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Gurung M, Schlegel BT, Rajasundaram D, Fox R, Bode L, Yao T, Lindemann SR, LeRoith T, Read QD, Simecka C, Carroll L, Andres A, Yeruva L. Microbiota from human infants consuming secretors or non-secretors mothers' milk impacts the gut and immune system in mice. mSystems 2024; 9:e0029424. [PMID: 38530054 PMCID: PMC11019842 DOI: 10.1128/msystems.00294-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 03/04/2024] [Indexed: 03/27/2024] Open
Abstract
Maternal secretor status is one of the determinants of human milk oligosaccharides (HMOs) composition, which, in turn, influences the gut microbiota composition of infants. To understand if this change in gut microbiota impacts immune cell composition, intestinal morphology, and gene expression, 21-day-old germ-free C57BL/6 mice were transplanted with fecal microbiota from infants whose mothers were either secretors (SMM) or non-secretors (NSM) or from infants consuming dairy-based formula (MFM). For each group, one set of mice was supplemented with HMOs. HMO supplementation did not significantly impact the microbiota diversity; however, SMM mice had a higher abundance of genus Bacteroides, Bifidobacterium, and Blautia, whereas, in the NSM group, there was a higher abundance of Akkermansia, Enterocloster, and Klebsiella. In MFM, gut microbiota was represented mainly by Parabacteroides, Ruminococcaceae_unclassified, and Clostrodium_sensu_stricto. In mesenteric lymph node, Foxp3+ T cells and innate lymphoid cells type 2 were increased in MFM mice supplemented with HMOs, while in the spleen, they were increased in SMM + HMOs mice. Similarly, serum immunoglobulin A was also elevated in MFM + HMOs group. Distinct global gene expression of the gut was observed in each microbiota group, which was enhanced with HMOs supplementation. Overall, our data show that distinct infant gut microbiota due to maternal secretor status or consumption of dairy-based formula and HMO supplementation impacts immune cell composition, antibody response, and intestinal gene expression in a mouse model. IMPORTANCE Early life factors like neonatal diet modulate gut microbiota, which is important for the optimal gut and immune function. One such factor, human milk oligosaccharides (HMOs), the composition of which is determined by maternal secretor status, has a profound effect on infant gut microbiota. However, how the infant gut microbiota composition determined by maternal secretor status or consumption of infant formula devoid of HMOs impacts infant intestinal ammorphology, gene expression, and immune signature is not well explored. This study provides insights into the differential establishment of infant microbiota derived from infants fed by secretor or non-secretor mothers milk or those consuming infant formula and demonstrates that the secretor status of mothers promotes Bifidobacteria and Bacteroides sps. establishment. This study also shows that supplementation of pooled HMOs in mice changed immune cell composition in the spleen and mesenteric lymph nodes and immunoglobulins in circulation. Hence, this study highlights that maternal secretor status has a role in infant gut microbiota composition, and this, in turn, can impact host gut and immune system.
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Affiliation(s)
- Manoj Gurung
- Microbiome and Metabolism Research Unit (MMRU), USDA-ARS, SEA, Arkansas Children’s Nutrition Center, Little Rock, Arkansas, USA
| | - Brent Thomas Schlegel
- University of Pittsburgh Medical Center (UPMC), Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Dhivyaa Rajasundaram
- University of Pittsburgh Medical Center (UPMC), Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Renee Fox
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Lars Bode
- Larsson-Rosenquist Foundation Mother-Milk-Infant Center of Research Excellence, University of California San Diego, La Jolla, California, USA
- Department of Pediatrics, University of California San Diego, La Jolla, California, USA
| | - Tianming Yao
- Department of Food Science, Whistler Center for Carbohydrate Research, Purdue University, West Lafayette, Indiana, USA
| | - Stephen R. Lindemann
- Department of Food Science, Whistler Center for Carbohydrate Research, Purdue University, West Lafayette, Indiana, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, Virginia, USA
| | | | - Christy Simecka
- Division of Laboratory Animal Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Laura Carroll
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Aline Andres
- Microbiome and Metabolism Research Unit (MMRU), USDA-ARS, SEA, Arkansas Children’s Nutrition Center, Little Rock, Arkansas, USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Laxmi Yeruva
- Microbiome and Metabolism Research Unit (MMRU), USDA-ARS, SEA, Arkansas Children’s Nutrition Center, Little Rock, Arkansas, USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
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Piccolo BD, Graham JL, Tabor-Simecka L, Randolph CE, Moody B, Robeson MS, Kang P, Fox R, Lan R, Pack L, Woford N, Yeruva L, LeRoith T, Stanhope KL, Havel PJ. Colonic epithelial hypoxia remains constant during the progression of diabetes in male UC Davis type 2 diabetes mellitus rats. BMJ Open Diabetes Res Care 2024; 12:e003813. [PMID: 38453236 PMCID: PMC10921531 DOI: 10.1136/bmjdrc-2023-003813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 02/12/2024] [Indexed: 03/09/2024] Open
Abstract
INTRODUCTION Colonocyte oxidation of bacterial-derived butyrate has been reported to maintain synergistic obligate anaerobe populations by reducing colonocyte oxygen levels; however, it is not known whether this process is disrupted during the progression of type 2 diabetes. Our aim was to determine whether diabetes influences colonocyte oxygen levels in the University of California Davis type 2 diabetes mellitus (UCD-T2DM) rat model. RESEARCH DESIGN AND METHODS Age-matched male UCD-T2DM rats (174±4 days) prior to the onset of diabetes (PD, n=15), within 1 month post-onset (RD, n=12), and 3 months post-onset (D3M, n=12) were included in this study. Rats were administered an intraperitoneal injection of pimonidazole (60 mg/kg body weight) 1 hour prior to euthanasia and tissue collection to estimate colonic oxygen levels. Colon tissue was fixed in 10% formalin, embedded in paraffin, and processed for immunohistochemical detection of pimonidazole. The colonic microbiome was assessed by 16S gene rRNA amplicon sequencing and content of short-chain fatty acids was measured by liquid chromatography-mass spectrometry. RESULTS HbA1c % increased linearly across the PD (5.9±0.1), RD (7.6±0.4), and D3M (11.5±0.6) groups, confirming the progression of diabetes in this cohort. D3M rats had a 2.5% increase in known facultative anaerobes, Escherichia-Shigella, and Streptococcus (false discovery rate <0.05) genera in colon contents. The intensity of pimonidazole staining of colonic epithelia did not differ across groups (p=0.37). Colon content concentrations of acetate and propionate also did not differ across UCD-T2DM groups; however, colonic butyric acid levels were higher in D3M rats relative to PD rats (p<0.01). CONCLUSIONS The advancement of diabetes in UCD-T2DM rats was associated with an increase in facultative anaerobes; however, this was not explained by changes in colonocyte oxygen levels. The mechanisms underlying shifts in gut microbe populations associated with the progression of diabetes in the UCD-T2DM rat model remain to be identified.
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Affiliation(s)
- Brian D Piccolo
- USDA-ARS Arkansas Children's Nutrition Center, Little Rock, Arkansas, USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - James L Graham
- Department of Nutrition, University of California Davis, Davis, California, USA
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, California, USA
| | | | - Christopher E Randolph
- Center for Translational Pediatric Research, Arkansas Children's Research Institute, Little Rock, Arkansas, USA
| | - Becky Moody
- USDA-ARS Arkansas Children's Nutrition Center, Little Rock, Arkansas, USA
| | - Michael S Robeson
- Department of Biomedical Informatics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Ping Kang
- USDA-ARS Arkansas Children's Nutrition Center, Little Rock, Arkansas, USA
| | - Renee Fox
- USDA-ARS Arkansas Children's Nutrition Center, Little Rock, Arkansas, USA
| | - Renny Lan
- USDA-ARS Arkansas Children's Nutrition Center, Little Rock, Arkansas, USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Lindsay Pack
- USDA-ARS Arkansas Children's Nutrition Center, Little Rock, Arkansas, USA
| | - Noah Woford
- College of Osteopathic Medicine, Lincoln Memorial University, Harrogate, Tennessee, USA
| | - Laxmi Yeruva
- USDA-ARS Arkansas Children's Nutrition Center, Little Rock, Arkansas, USA
| | - Tanya LeRoith
- Department of Biomedical Science and Pathobiology, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
| | - Kimber L Stanhope
- Department of Nutrition, University of California Davis, Davis, California, USA
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, California, USA
| | - Peter J Havel
- Department of Nutrition, University of California Davis, Davis, California, USA
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, California, USA
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Kazmierczak J, Sugai NJ, Withowski KE, Jonatan A, LeRoith T, Cecere JT. Case report: A case of oviductal and uterine leiomyosarcoma in an 11-year-old dog. Front Vet Sci 2023; 10:1227799. [PMID: 38130438 PMCID: PMC10733494 DOI: 10.3389/fvets.2023.1227799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023] Open
Abstract
An 11-year-old, intact female Pomeranian dog was presented for evaluation due to an 18-h history of anorexia and lethargy. Abdominal ultrasound revealed a 3×3 cm mass of mixed echogenicity at the level of the left ovary. At laparotomy, a 5 mm mass was identified at the cranial region of the right uterine horn and a 3 cm round mass was visualized near the cranial aspect of the left uterine horn. Ovariohysterectomy was performed. A diagnosis of grade 1 oviductal and uterine leiomyosarcoma was made via histopathology for both masses. Oviductal leiomyosarcomas are rare and generally locally invasive similar to other soft tissue sarcomas but do not often metastasize. Uterine leiomyosarcomas are also uncommon but are one of the more common tumors affecting the female reproductive tract. This is the only known case report of oviductal leiomyosarcoma in the dog and the only report of uterine leiomyosarcoma in addition to oviductal leiomyosarcoma as well. This case illustrates the oviduct as an additional site that can be affected by leiomyosarcoma and demonstrates surgery as a treatment option for patients diagnosed with this condition.
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Affiliation(s)
- Jillian Kazmierczak
- DVM Candidate 2023 Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, United States
| | - Nicole J. Sugai
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, United States
| | - Katie E. Withowski
- Locum Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, United States
| | - Abe Jonatan
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, United States
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, United States
| | - Julie T. Cecere
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, United States
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Stevenson VB, Gudenschwager-Basso EK, Klahn S, LeRoith T, Huckle WR. Inhibitory checkpoint molecule mRNA expression in canine soft tissue sarcoma. Vet Comp Oncol 2023; 21:709-716. [PMID: 37680007 PMCID: PMC10841275 DOI: 10.1111/vco.12934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 07/31/2023] [Accepted: 08/10/2023] [Indexed: 09/09/2023]
Abstract
Canine soft tissue sarcomas (STS) are common neoplasms and considered immune deserts. Tumour infiltrating lymphocytes are sparse in STS and, when present, tend to organize around blood vessels or at the periphery of the neoplasm. This pattern is associated with an immunosuppressive tumour microenvironment linked to overexpression of molecules of the PD-axis. PD-1, PD-L1 and PD-L2 expression correlates with malignancy and poor prognosis in other neoplasms in humans and dogs, but little is known about their role in canine STS, their relationship to tumour grade, and how different therapies affect expression. The objective of this study was to evaluate the expression of checkpoint molecules across STS tumour grades and after tumour ablation treatment. Gene expression analysis was performed by reverse-transcriptase real-time quantitative PCR in soft tissue sarcomas that underwent histotripsy and from histologic specimens of STS from the Virginia Tech Animal Laboratory Services archives. The expression of PD-1, PD-L1 and PD-L2 was detected in untreated STS tissue representing grades 1, 2, and 3. Numerically decreased expression of all markers was observed in tissue sampled from the treatment interface relative to untreated areas of the tumour. The relatively lower expression of these checkpoint molecules at the periphery of the treated area may be related to liquefactive necrosis induced by the histotripsy treatment, and would potentially allow TILs to infiltrate the tumour. Relative increases of these checkpoint molecules in tumours of a higher grade and alongside immune cell infiltration are consistent with previous reports that associate their expression with malignancy.
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Affiliation(s)
- Valentina Beatriz Stevenson
- Department of Biomedical Sciences & Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, USA
| | - Erwin Kristobal Gudenschwager-Basso
- Department of Biomedical Sciences & Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, USA
| | - Shawna Klahn
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences & Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, USA
| | - William R. Huckle
- Department of Biomedical Sciences & Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, USA
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Engavale M, Hernandez CJ, Infante A, LeRoith T, Radovan E, Evans L, Villarreal J, Reilly CM, Sutton RB, Keyel PA. Deficiency of macrophage-derived Dnase1L3 causes lupus-like phenotypes in mice. J Leukoc Biol 2023; 114:547-556. [PMID: 37804110 PMCID: PMC10843819 DOI: 10.1093/jleuko/qiad115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 08/01/2023] [Accepted: 09/07/2023] [Indexed: 10/08/2023] Open
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease caused by environmental factors and loss of key proteins, including the endonuclease Dnase1L3. Dnase1L3 absence causes pediatric-onset lupus in humans, while reduced activity occurs in adult-onset SLE. The amount of Dnase1L3 that prevents lupus remains unknown. To genetically reduce Dnase1L3 levels, we developed a mouse model lacking Dnase1L3 in macrophages (conditional knockout [cKO]). Serum Dnase1L3 levels were reduced 67%, though Dnase1 activity remained constant. Homogeneous and peripheral antinuclear antibodies were detected in the sera by immunofluorescence, consistent with anti-double-stranded DNA (anti-dsDNA) antibodies. Total immunoglobulin M, total immunoglobulin G, and anti-dsDNA antibody levels increased in cKO mice with age. The cKO mice developed anti-Dnase1L3 antibodies. In contrast to global Dnase1L3-/- mice, anti-dsDNA antibodies were not elevated early in life. The cKO mice had minimal kidney pathology. Therefore, we conclude that an intermediate reduction in serum Dnase1L3 causes mild lupus phenotypes, and macrophage-derived DnaselL3 helps limit lupus.
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Affiliation(s)
- Minal Engavale
- Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409, United States
| | - Colton J. Hernandez
- Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409, United States
| | - Angelica Infante
- Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409, United States
| | - Tanya LeRoith
- Department of Cell Biology and Physiology, Virginia Tech, Blacksburg, VA 24061, United States
| | - Elliott Radovan
- Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409, United States
| | - Lauryn Evans
- Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409, United States
| | - Johanna Villarreal
- Department of Cell Physiology and Molecular Biophysics, Texas Tech University Health Sciences Center, Lubbock, TX 79430, United States
| | - Christopher M. Reilly
- Department of Cell Biology and Physiology, Virginia Tech, Blacksburg, VA 24061, United States
| | - R. Bryan Sutton
- Department of Cell Physiology and Molecular Biophysics, Texas Tech University Health Sciences Center, Lubbock, TX 79430, United States
| | - Peter A. Keyel
- Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409, United States
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Li W, Wang T, Rajendrakumar AM, Acharya G, Miao Z, Varghese BP, Yu H, Dhakal B, LeRoith T, Karunakaran A, Tuo W, Zhu X. An FcRn-targeted mucosal vaccine against SARS-CoV-2 infection and transmission. Nat Commun 2023; 14:7114. [PMID: 37932271 PMCID: PMC10628175 DOI: 10.1038/s41467-023-42796-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 10/21/2023] [Indexed: 11/08/2023] Open
Abstract
SARS-CoV-2 is primarily transmitted through droplets and airborne aerosols, and in order to prevent infection and reduce viral spread vaccines should elicit protective immunity in the airways. The neonatal Fc receptor (FcRn) transfers IgG across epithelial barriers and can enhance mucosal delivery of antigens. Here we explore FcRn-mediated respiratory delivery of SARS-CoV-2 spike (S). A monomeric IgG Fc was fused to a stabilized spike; the resulting S-Fc bound to S-specific antibodies and FcRn. Intranasal immunization of mice with S-Fc and CpG significantly induced antibody responses compared to the vaccination with S alone or PBS. Furthermore, we intranasally immunized mice or hamsters with S-Fc. A significant reduction of virus replication in nasal turbinate, lung, and brain was observed following nasal challenges with SARS-CoV-2 and its variants. Intranasal immunization also significantly reduced viral airborne transmission in hamsters. Nasal IgA, neutralizing antibodies, lung-resident memory T cells, and bone-marrow S-specific plasma cells mediated protection. Hence, FcRn delivers an S-Fc antigen effectively into the airway and induces protection against SARS-CoV-2 infection and transmission.
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Affiliation(s)
- Weizhong Li
- Division of Immunology, Virginia-Maryland College of Veterinary Medicine, University of Maryland, College Park, MD, 20742, USA
| | - Tao Wang
- Division of Immunology, Virginia-Maryland College of Veterinary Medicine, University of Maryland, College Park, MD, 20742, USA
| | - Arunraj M Rajendrakumar
- Division of Immunology, Virginia-Maryland College of Veterinary Medicine, University of Maryland, College Park, MD, 20742, USA
- Animal Parasitic Diseases Laboratory, ARS, United States Department of Agriculture, Beltsville, MD, 20705, USA
| | - Gyanada Acharya
- Division of Immunology, Virginia-Maryland College of Veterinary Medicine, University of Maryland, College Park, MD, 20742, USA
| | - Zizhen Miao
- Division of Immunology, Virginia-Maryland College of Veterinary Medicine, University of Maryland, College Park, MD, 20742, USA
| | - Berin P Varghese
- Division of Immunology, Virginia-Maryland College of Veterinary Medicine, University of Maryland, College Park, MD, 20742, USA
| | - Hailiang Yu
- Division of Immunology, Virginia-Maryland College of Veterinary Medicine, University of Maryland, College Park, MD, 20742, USA
| | - Bibek Dhakal
- Division of Immunology, Virginia-Maryland College of Veterinary Medicine, University of Maryland, College Park, MD, 20742, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech University, Blacksburg, VA, USA
| | - Athira Karunakaran
- Animal Parasitic Diseases Laboratory, ARS, United States Department of Agriculture, Beltsville, MD, 20705, USA
| | - Wenbin Tuo
- Animal Parasitic Diseases Laboratory, ARS, United States Department of Agriculture, Beltsville, MD, 20705, USA
| | - Xiaoping Zhu
- Division of Immunology, Virginia-Maryland College of Veterinary Medicine, University of Maryland, College Park, MD, 20742, USA.
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Mahsoub HM, Heffron CL, Hassebroek AM, Sooryanarain H, Wang B, LeRoith T, Raimundi Rodriguez G, Tian D, Meng XJ. Erratum for Mahsoub et al., "Fetal Loss in Pregnant Rabbits Infected with Genotype 3 Hepatitis E Virus Is Associated with Altered Inflammatory Responses, Enhanced Virus Replication, and Extrahepatic Virus Dissemination with Positive Correlations with Increased Estradiol Level". mBio 2023; 14:e0225623. [PMID: 37811953 PMCID: PMC10653902 DOI: 10.1128/mbio.02256-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023] Open
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Mahsoub HM, Heffron CL, Hassebroek AM, Sooryanarain H, Wang B, LeRoith T, Rodríguez GR, Tian D, Meng XJ. Fetal Loss in Pregnant Rabbits Infected with Genotype 3 Hepatitis E Virus Is Associated with Altered Inflammatory Responses, Enhanced Virus Replication, and Extrahepatic Virus Dissemination with Positive Correlations with Increased Estradiol Level. mBio 2023; 14:e0041823. [PMID: 36939322 PMCID: PMC10128027 DOI: 10.1128/mbio.00418-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 02/24/2023] [Indexed: 03/21/2023] Open
Abstract
Hepatitis E virus (HEV) causes adverse clinical outcomes in pregnant women, but the underlying mechanisms remain poorly understood. To delineate the mechanisms of pregnancy-associated adverse effects during HEV infection, we utilized a genotype 3 HEV from rabbit (HEV-3ra) and its cognate host (rabbits) to systematically investigate the clinical consequences, viral replication dynamics, and host immune and hormonal responses of HEV infection during pregnancy. We found a significant fetal loss of 23% in HEV-infected pregnant rabbits, indicating an early-stage miscarriage. HEV infection in pregnant rabbits was characterized by higher viral loads in feces, intestinal contents, liver, and spleen tissues, as well as a longer and earlier onset of viremia than in infected nonpregnant rabbits. HEV infection altered the pattern of cytokine gene expressions in the liver of pregnant rabbits and caused a transient increase of serum interferon gamma (IFN-γ) shortly after a notable increase in viral replication, which may contribute to early fetal loss. Histological lesions in the spleen were more pronounced in infected pregnant rabbits, although moderate liver lesions were seen in both infected pregnant and nonpregnant rabbits. Total bilirubin was elevated in infected pregnant rabbits. The serum levels of estradiol (E2) in HEV-infected pregnant rabbits were significantly higher than those in mock-infected pregnant rabbits at 14 days postinoculation (dpi) and correlated positively with higher viral loads in feces, liver, and spleen tissues at 28 dpi, suggesting that it may play a role in extrahepatic virus dissemination. The results have important implications for understanding the severe diseases associated with HEV infection during pregnancy. IMPORTANCE HEV causes adverse pregnancy outcomes, with a mortality rate of >30% in pregnant women, but the underlying mechanisms are poorly understood. In this study, we utilized HEV-3ra and its cognate host (pregnant rabbit) to delineate the potential underlying mechanisms of pregnancy-associated adverse outcomes during HEV infection. We found that infected pregnant rabbits had a fetal loss of 23%, which coincided with enhanced viral replication and an elevated systemic IFN-γ response, followed by longer viremia duration and extrahepatic viral dissemination. Estradiol levels were increased in infected pregnant rabbits and correlated positively with higher fecal viral shedding and higher viral loads in liver and spleen tissues. Infected pregnant rabbits had more pronounced splenic lesions, higher serum total bilirubin, and an altered cytokine gene expression profile in the liver. The results will contribute to our understanding of the mechanisms of HEV-associated adverse pregnancy outcomes.
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Affiliation(s)
- Hassan M. Mahsoub
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
- Center for Emerging, Zoonotic and Arthropod-borne Pathogens, Fralin Life Sciences Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
| | - C. Lynn Heffron
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
- Center for Emerging, Zoonotic and Arthropod-borne Pathogens, Fralin Life Sciences Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
| | - Anna M. Hassebroek
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
- Center for Emerging, Zoonotic and Arthropod-borne Pathogens, Fralin Life Sciences Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
| | - Harini Sooryanarain
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
- Center for Emerging, Zoonotic and Arthropod-borne Pathogens, Fralin Life Sciences Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
| | - Bo Wang
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
- Center for Emerging, Zoonotic and Arthropod-borne Pathogens, Fralin Life Sciences Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
- Center for Emerging, Zoonotic and Arthropod-borne Pathogens, Fralin Life Sciences Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
| | - Guillermo Raimundi Rodríguez
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
- Center for Emerging, Zoonotic and Arthropod-borne Pathogens, Fralin Life Sciences Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
| | - Debin Tian
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
- Center for Emerging, Zoonotic and Arthropod-borne Pathogens, Fralin Life Sciences Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
| | - Xiang-Jin Meng
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
- Center for Emerging, Zoonotic and Arthropod-borne Pathogens, Fralin Life Sciences Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
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9
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Engavale M, Hernandez CJ, Infante A, LeRoith T, Radovan E, Evans L, Villarreal J, Reilly CM, Sutton RB, Keyel PA. Deficiency of macrophage-derived Dnase1L3 causes lupus-like phenotypes in mice. bioRxiv 2023:2023.04.17.537232. [PMID: 37131692 PMCID: PMC10153119 DOI: 10.1101/2023.04.17.537232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Systemic Lupus Erythematosus (SLE) is a chronic autoimmune disease caused by environmental factors and loss of key proteins. One such protein is a serum endonuclease secreted by macrophages and dendritic cells, Dnase1L3. Loss of Dnase1L3 causes pediatric-onset lupus in humans is Dnase1L3. Reduction in Dnase1L3 activity occurs in adult-onset human SLE. However, the amount of Dnase1L3 necessary to prevent lupus onset, if the impact is continuous or requires a threshold, and which phenotypes are most impacted by Dnase1L3 remain unknown. To reduce Dnase1L3 protein levels, we developed a genetic mouse model with reduced Dnase1L3 activity by deleting Dnase1L3 from macrophages (cKO). Serum Dnase1L3 levels were reduced 67%, though Dnase1 activity remained constant. Sera were collected weekly from cKO and littermate controls until 50 weeks of age. Homogeneous and peripheral anti-nuclear antibodies were detected by immunofluorescence, consistent with anti-dsDNA antibodies. Total IgM, total IgG, and anti-dsDNA antibody levels increased in cKO mice with increasing age. In contrast to global Dnase1L3 -/- mice, anti-dsDNA antibodies were not elevated until 30 weeks of age. The cKO mice had minimal kidney pathology, except for deposition of immune complexes and C3. Based on these findings, we conclude that an intermediate reduction in serum Dnase1L3 causes mild lupus phenotypes. This suggest that macrophage-derived DnaselL3 is critical to limiting lupus.
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Cereghino C, Roesch F, Carrau L, Hardy A, Ribeiro-Filho HV, Henrion-Lacritick A, Koh C, Marano JM, Bates TA, Rai P, Chuong C, Akter S, Vallet T, Blanc H, Elliott TJ, Brown AM, Michalak P, LeRoith T, Bloom JD, Marques RE, Saleh MC, Vignuzzi M, Weger-Lucarelli J. The E2 glycoprotein holds key residues for Mayaro virus adaptation to the urban Aedes aegypti mosquito. PLoS Pathog 2023; 19:e1010491. [PMID: 37018377 PMCID: PMC10109513 DOI: 10.1371/journal.ppat.1010491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 04/17/2023] [Accepted: 03/13/2023] [Indexed: 04/06/2023] Open
Abstract
Adaptation to mosquito vectors suited for transmission in urban settings is a major driver in the emergence of arboviruses. To better anticipate future emergence events, it is crucial to assess their potential to adapt to new vector hosts. In this work, we used two different experimental evolution approaches to study the adaptation process of an emerging alphavirus, Mayaro virus (MAYV), to Ae. aegypti, an urban mosquito vector of many other arboviruses. We identified E2-T179N as a key mutation increasing MAYV replication in insect cells and enhancing transmission after escaping the midgut of live Ae. aegypti. In contrast, this mutation decreased viral replication and binding in human fibroblasts, a primary cellular target of MAYV in humans. We also showed that MAYV E2-T179N generates reduced viremia and displays less severe tissue pathology in vivo in a mouse model. We found evidence in mouse fibroblasts that MAYV E2-T179N is less dependent on the Mxra8 receptor for replication than WT MAYV. Similarly, exogenous expression of human apolipoprotein receptor 2 and Mxra8 enhanced WT MAYV replication compared to MAYV E2-T179N. When this mutation was introduced in the closely related chikungunya virus, which has caused major outbreaks globally in the past two decades, we observed increased replication in both human and insect cells, suggesting E2 position 179 is an important determinant of alphavirus host-adaptation, although in a virus-specific manner. Collectively, these results indicate that adaptation at the T179 residue in MAYV E2 may result in increased vector competence-but coming at the cost of optimal replication in humans-and may represent a first step towards a future emergence event.
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Affiliation(s)
- Chelsea Cereghino
- Department of Biomedical Sciences and Pathobiology, VA-MD Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, United States of America
- Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Tech, Blacksburg, Virginia, United States of America
| | - Ferdinand Roesch
- Institut Pasteur, Viral Populations and Pathogenesis Unit, Centre National de la Recherche Scientifique UMR 3569, Paris, France
- UMR 1282 ISP, INRAE Centre Val de Loire, Nouzilly, France
| | - Lucía Carrau
- Institut Pasteur, Viral Populations and Pathogenesis Unit, Centre National de la Recherche Scientifique UMR 3569, Paris, France
- Department of Microbiology, New York University Langone Medical Center, New York, New York, United States of America
| | - Alexandra Hardy
- Institut Pasteur, Viral Populations and Pathogenesis Unit, Centre National de la Recherche Scientifique UMR 3569, Paris, France
| | - Helder V. Ribeiro-Filho
- Brazilian Biosciences National Laboratory, Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, São Paulo, Brazil
| | - Annabelle Henrion-Lacritick
- Institut Pasteur, Viruses and RNA Interference Unit, Centre National de la Recherche Scientifique UMR 3569, Paris, France
| | - Cassandra Koh
- Institut Pasteur, Viruses and RNA Interference Unit, Centre National de la Recherche Scientifique UMR 3569, Paris, France
| | - Jeffrey M. Marano
- Department of Biomedical Sciences and Pathobiology, VA-MD Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, United States of America
- Translational Biology, Medicine, and Health Graduate Program, Virginia Tech, Roanoke, Virginia, United States of America
| | - Tyler A. Bates
- Department of Biomedical Sciences and Pathobiology, VA-MD Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, United States of America
| | - Pallavi Rai
- Department of Biomedical Sciences and Pathobiology, VA-MD Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, United States of America
| | - Christina Chuong
- Department of Biomedical Sciences and Pathobiology, VA-MD Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, United States of America
| | - Shamima Akter
- Department of Biomedical Sciences and Pathobiology, VA-MD Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, United States of America
- Department of Bioinformatics and Computational Biology, School of Systems Biology, George Mason University, Fairfax, Virginia, United States of America
| | - Thomas Vallet
- Institut Pasteur, Viral Populations and Pathogenesis Unit, Centre National de la Recherche Scientifique UMR 3569, Paris, France
| | - Hervé Blanc
- Institut Pasteur, Viruses and RNA Interference Unit, Centre National de la Recherche Scientifique UMR 3569, Paris, France
| | - Truitt J. Elliott
- Program in Genetics, Bioinformatics, and Computational Biology (GBCB), Virginia Tech, Blacksburg, Virginia, United States of America
- Research and Informatics, University Libraries, Virginia Tech, Blacksburg, Virginia, United States of America
- Department of Biochemistry, Virginia Tech, Blacksburg, Virginia, United States of America
| | - Anne M. Brown
- Program in Genetics, Bioinformatics, and Computational Biology (GBCB), Virginia Tech, Blacksburg, Virginia, United States of America
| | - Pawel Michalak
- Department of Biomedical Sciences and Pathobiology, VA-MD Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, United States of America
- Edward Via College of Osteopathic Medicine, Monroe, Louisiana, United States of America
- Center for One Health Research, VA-MD Regional College of Veterinary Medicine, Blacksburg, Virginia, Untied States of Ameria
- Institute of Evolution, University of Haifa, Haifa, Israel
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, VA-MD Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, United States of America
| | - Jesse D. Bloom
- Basic Sciences Division and Computational Biology Program, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- Howard Hughes Medical Institute, Chevy Chase, Maryland, United States of America
| | - Rafael Elias Marques
- Brazilian Biosciences National Laboratory, Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, São Paulo, Brazil
| | - Maria-Carla Saleh
- Institut Pasteur, Viruses and RNA Interference Unit, Centre National de la Recherche Scientifique UMR 3569, Paris, France
| | - Marco Vignuzzi
- Institut Pasteur, Viral Populations and Pathogenesis Unit, Centre National de la Recherche Scientifique UMR 3569, Paris, France
| | - James Weger-Lucarelli
- Department of Biomedical Sciences and Pathobiology, VA-MD Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia, United States of America
- Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Tech, Blacksburg, Virginia, United States of America
- Institut Pasteur, Viral Populations and Pathogenesis Unit, Centre National de la Recherche Scientifique UMR 3569, Paris, France
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11
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Zhu J, Naughton S, Bowman N, LeRoith T, Luo X, Leeth C. Maternal antibody repertoire restriction modulates the development of lupus-like disease in BXSB offspring. Int Immunol 2023; 35:95-104. [PMID: 36190342 DOI: 10.1093/intimm/dxac049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Accepted: 10/01/2022] [Indexed: 11/13/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is a complex autoimmune disease that has a strong preference for women of child-bearing age. Maternal factors play an essential role in shaping the immune system of the newborn, yet it is unknown whether maternal factors could modulate the development of SLE in the offspring. Activation-induced cytidine deaminase (AID) is an enzyme required for somatic hypermutation and class switch recombination. Given that IgG and IgA isotypes account for the vast majority of passive immunity in rodents, our previously established AID-deficient BXSB mice provide a model in which maternal antibodies that can be transferred to the offspring are greatly diminished and have restricted repertoire. In this study, we compared genotypically identical mice born to either AID-sufficient dams or AID-deficient dams and evaluated the effects of maternal antibodies in disease progression. Offspring from knockout dams developed disease at a faster rate, as shown by more severe nephritis and elevated pathogenic autoantibodies compared to their counterparts born to wild-type dams. When immune competent pups were cross fostered onto AID-deficient dams, these mice exhibited more severe disease characteristics, including exacerbated lupus nephritis, increased levels of circulating antinuclear antibodies, and more activated T cells. These results suggest that a protective antibody effect contributes to the modulation of SLE progression in postnatal period. Overall, these findings highlight the importance of maternal antibodies in programming the immune system and altering SLE development in offspring.
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Affiliation(s)
- Jing Zhu
- Department of Animal and Poultry Sciences, Virginia Tech, 175 West Campus Drive, 3280 Litton Reaves Hall, Blacksburg, VA 24061, USA.,Department of Biomedical Sciences and Pathobiology, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Samantha Naughton
- Department of Animal and Poultry Sciences, Virginia Tech, 175 West Campus Drive, 3280 Litton Reaves Hall, Blacksburg, VA 24061, USA
| | - Nina Bowman
- Department of Animal and Poultry Sciences, Virginia Tech, 175 West Campus Drive, 3280 Litton Reaves Hall, Blacksburg, VA 24061, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Xin Luo
- Department of Biomedical Sciences and Pathobiology, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Caroline Leeth
- Department of Animal and Poultry Sciences, Virginia Tech, 175 West Campus Drive, 3280 Litton Reaves Hall, Blacksburg, VA 24061, USA
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12
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Hassebroek AM, Sooryanarain H, Heffron CL, Hawks SA, LeRoith T, Cecere TE, Stone WB, Walter D, Mahsoub HM, Wang B, Tian D, Ivester HM, Allen IC, Auguste AJ, Duggal NK, Zhang C, Meng XJ. A hepatitis B virus core antigen-based virus-like particle vaccine expressing SARS-CoV-2 B and T cell epitopes induces epitope-specific humoral and cell-mediated immune responses but confers limited protection against SARS-CoV-2 infection. J Med Virol 2023; 95:e28503. [PMID: 36655751 PMCID: PMC9974889 DOI: 10.1002/jmv.28503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 01/11/2023] [Accepted: 01/13/2023] [Indexed: 01/20/2023]
Abstract
The hepatitis B virus core antigen (HBcAg) tolerates insertion of foreign epitopes and maintains its ability to self-assemble into virus-like particles (VLPs). We constructed a ∆HBcAg-based VLP vaccine expressing three predicted severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) B and T cell epitopes and determined its immunogenicity and protective efficacy. The recombinant ∆HBcAg-SARS-CoV-2 protein was expressed in Escherichia coli, purified, and shown to form VLPs. K18-hACE2 transgenic C57BL/6 mice were immunized intramuscularly with ∆HBcAg VLP control (n = 15) or ∆HBcAg-SARS-CoV-2 VLP vaccine (n = 15). One week after the 2nd booster and before virus challenge, five ∆HBcAg-SARS-CoV-2 vaccinated mice were euthanized to evaluate epitope-specific immune responses. There is a statistically significant increase in epitope-specific Immunoglobulin G (IgG) response, and statistically higher interleukin 6 (IL-6) and monocyte chemoattractant protein-1 (MCP-1) expression levels in ∆HBcAg-SARS-CoV-2 VLP-vaccinated mice compared to ∆HBcAg VLP controls. While not statistically significant, the ∆HBcAg-SARS-CoV-2 VLP mice had numerically more memory CD8+ T-cells, and 3/5 mice also had numerically higher levels of interferon gamma (IFN-γ) and tumor necrosis factor (TNF). After challenge with SARS-CoV-2, ∆HBcAg-SARS-CoV-2 immunized mice had numerically lower viral RNA loads in the lung, and slightly higher survival, but the differences are not statistically significant. These results indicate that the ∆HBcAg-SARS-CoV-2 VLP vaccine elicits epitope-specific humoral and cell-mediated immune responses but they were insufficient against SARS-CoV-2 infection.
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Affiliation(s)
- Anna M. Hassebroek
- Department of Biomedical Sciences and Pathobiology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Harini Sooryanarain
- Department of Biomedical Sciences and Pathobiology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - C. Lynn Heffron
- Department of Biomedical Sciences and Pathobiology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Seth A. Hawks
- Department of Biomedical Sciences and Pathobiology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Thomas E. Cecere
- Department of Biomedical Sciences and Pathobiology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - William B. Stone
- Department of Entomology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Debra Walter
- Department of Biological System Engineering, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Hassan M. Mahsoub
- Department of Biomedical Sciences and Pathobiology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Bo Wang
- Department of Biomedical Sciences and Pathobiology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Debin Tian
- Department of Biomedical Sciences and Pathobiology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Hannah M. Ivester
- Department of Biomedical Sciences and Pathobiology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Irving C. Allen
- Department of Biomedical Sciences and Pathobiology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Albert J. Auguste
- Department of Entomology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Nisha K. Duggal
- Department of Biomedical Sciences and Pathobiology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Chenming Zhang
- Department of Biological System Engineering, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Xiang-Jin Meng
- Department of Biomedical Sciences and Pathobiology, Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
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13
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Gurung M, Rosa F, Yelvington B, Terry N, Read QD, Piccolo BD, Moody B, Tripp P, Pittman HE, Fay BL, Ross TJ, Sikes JD, Flowers JB, Fox R, LeRoith T, Talatala R, Bar-Yoseph F, Yeruva L. Evaluation of a Plant-Based Infant Formula Containing Almonds and Buckwheat on Gut Microbiota Composition, Intestine Morphology, Metabolic and Immune Markers in a Neonatal Piglet Model. Nutrients 2023; 15:383. [PMID: 36678256 PMCID: PMC9861483 DOI: 10.3390/nu15020383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/10/2023] [Accepted: 01/11/2023] [Indexed: 01/14/2023] Open
Abstract
A controlled-neonatal piglet trial was conducted to evaluate the impact of a plant-based infant formula containing buckwheat and almonds as the main source of protein compared to a commercially available dairy-based formula on the gut health parameters. Two day old piglets were fed either a plant-based or a dairy-based formula until day 21. Gut microbiome, cytokines, growth and metabolism related outcomes, and intestinal morphology were evaluated to determine the safety of the plant-based infant formula. This study reported that the plant-based formula-fed piglets had a similar intestinal microbiota composition relative to the dairy-based formula-fed group. However, differential abundance of specific microbiota species was detected within each diet group in the small and large intestinal regions and fecal samples. Lactobacillus delbrueckii, Lactobacillus crispatus, and Fusobacterium sp. had higher abundance in the small intestine of plant-based formula-fed piglets compared to the dairy-based group. Bacteroides nordii, Enterococcus sp., Lactobacillus crispatus, Prevotella sp., Ruminococcus lactaris, Bacteroides nordii, Eisenbergiella sp., Lactobacillus crispatus, Prevotella sp., and Akkermansia muciniphila had greater abundance in the large intestine of the plant based diet fed piglets relative to the dairy-based diet group. In the feces, Clostridiales, Bacteroides uniformis, Butyricimonasvirosa, Cloacibacillus porcorum, Clostridium clostridioforme, and Fusobacterium sp. were abundant in dairy-based group relative to the plant-based group. Lachnospiraceae, Clostridium scindens, Lactobacillus coleohominis, and Prevetolla sp. had greater abundance in the feces of the plant-based group in comparison to the dairy-based group. Gut morphology was similar between the plant and the dairy-based formula-fed piglets. Circulatory cytokines, magnesium, triiodothyronine (T3), thyroxine (T4), thyroid stimulating hormone (TSH), vitamin D, vitamin K, and IgE levels were similar among all piglets independent of dietary group. Overall, the present study demonstrated that a plant-based formula with buckwheat and almonds as the primary source of protein can support similar gut microbiota growth and health outcomes compared to a dairy-based infant formula.
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Affiliation(s)
- Manoj Gurung
- USDA-ARS, South East Area, Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA
| | - Fernanda Rosa
- USDA-ARS, South East Area, Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA
- School of Veterinary Medicine, Texas Tech University, Amarillo, TX 79409, USA
| | - Brooke Yelvington
- USDA-ARS, South East Area, Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA
| | - Nathan Terry
- USDA-ARS, South East Area, Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA
| | - Quentin D. Read
- USDA-ARS, Southeast Area, North Carolina State University, Raleigh, NC 27695, USA
| | - Brian D. Piccolo
- USDA-ARS, South East Area, Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA
| | - Becky Moody
- USDA-ARS, South East Area, Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA
| | - Patricia Tripp
- USDA-ARS, South East Area, Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA
| | - Hoy E. Pittman
- USDA-ARS, South East Area, Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA
| | - Bobby L. Fay
- USDA-ARS, South East Area, Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA
| | - Talyor J. Ross
- USDA-ARS, South East Area, Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA
| | - James D. Sikes
- USDA-ARS, South East Area, Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA
| | | | - Renee Fox
- USDA-ARS, South East Area, Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences & Pathobiology, Virginia Tech, Blacksburg, VA 24061, USA
| | - Rachelanne Talatala
- USDA-ARS, South East Area, Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA
| | | | - Laxmi Yeruva
- USDA-ARS, South East Area, Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA
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14
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Stevenson VB, Klahn S, LeRoith T, Huckle WR. Canine melanoma: A review of diagnostics and comparative mechanisms of disease and immunotolerance in the era of the immunotherapies. Front Vet Sci 2023; 9:1046636. [PMID: 36686160 PMCID: PMC9853198 DOI: 10.3389/fvets.2022.1046636] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 12/12/2022] [Indexed: 01/09/2023] Open
Abstract
Melanomas in humans and dogs are highly malignant and resistant to therapy. Since the first development of immunotherapies, interest in how the immune system interacts within the tumor microenvironment and plays a role in tumor development, progression, or remission has increased. Of major importance are tumor-infiltrating lymphocytes (TILs) where distribution and cell frequencies correlate with survival and therapeutic outcomes. Additionally, efforts have been made to identify subsets of TILs populations that can contribute to a tumor-promoting or tumor-inhibiting environment, such as the case with T regulatory cells versus CD8 T cells. Furthermore, cancerous cells have the capacity to express certain inhibitory checkpoint molecules, including CTLA-4, PD-L1, PD-L2, that can suppress the immune system, a property associated with poor prognosis, a high rate of recurrence, and metastasis. Comparative oncology brings insights to comprehend the mechanisms of tumorigenesis and immunotolerance in humans and dogs, contributing to the development of new therapeutic agents that can modulate the immune response against the tumor. Therapies that target signaling pathways such as mTOR and MEK/ERK that are upregulated in cancer, or immunotherapies with different approaches such as CAR-T cells engineered for specific tumor-associated antigens, DNA vaccines using human tyrosinase or CGSP-4 antigen, anti-PD-1 or -PD-L1 monoclonal antibodies that intercept their binding inhibiting the suppression of the T cells, and lymphokine-activated killer cells are already in development for treating canine tumors. This review provides concise and recent information about diagnosis, comparative mechanisms of tumor development and progression, and the current status of immunotherapies directed toward canine melanoma.
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Affiliation(s)
- Valentina B. Stevenson
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - Shawna Klahn
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States,Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - William R. Huckle
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States,*Correspondence: William R. Huckle ✉
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15
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Hicks K, LeRoith T, Partridge B, Dervisis N. In-Transit Metastasis in a Dog with High-Grade Soft Tissue Sarcoma: A Case Report. J Am Anim Hosp Assoc 2023; 59:36-39. [PMID: 36584319 DOI: 10.5326/jaaha-ms-7281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/30/2021] [Indexed: 12/31/2022]
Abstract
A 6 yr old male castrated American Staffordshire terrier was referred for a nonhealing wound at the site of a previously incompletely excised, high-grade soft tissue sarcoma. Physical examination revealed right popliteal lymphadenopathy and a fungating mass of the right pelvic limb at the level of the hock. Thoracic and abdominal computed tomography revealed mild lymphadenopathy of multiple iliac and inguinal lymph nodes. Right pelvic limb amputation and inguinal lymphadenectomy were performed. Histopathology was consistent of a high-grade soft tissue sarcoma with diffuse spread through the lymphatic vessels of the right pelvic limb up to the right inguinal lymph node but not affecting the lymph node itself. Doxorubicin chemotherapy was elected postoperatively as adjuvant therapy. Approximately 4 mo following initiation of chemotherapy, the patient developed a firm, tubular subcutaneous mass starting near the previous amputation site with tracking toward the thorax. Fine needle aspiration of the new mass was consistent with atypical spindle cell proliferation. Palliative care was elected, and the patient was euthanized 3 mo later because of progressive disease. In-transit metastasis is a rare behavior for soft tissue sarcomas across all species, and this is the first report of such a presentation for canine soft tissue sarcoma.
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Affiliation(s)
- Kelly Hicks
- From the Department of Clinical Sciences, Carlson College of Veterinary Medicine, Oregon State University, Corvallis, Oregon (K.H.)
| | - Tanya LeRoith
- From the Department of Biomedical Sciences and Pathobiology (T.L.), Virginia-Maryland College of Veterinary Medicine, Blacksburg, Virginia
| | - Brittanie Partridge
- From the Department of Small Animal Clinical Sciences (B.P.), Virginia-Maryland College of Veterinary Medicine, Blacksburg, Virginia
| | - Nikolaos Dervisis
- From the Department of Small Animal Clinical Sciences, Virginia Tech, Blacksburg, Virginia (N.D.)
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16
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Li W, Wang T, Rajendrakumar AM, Acharya G, Miao Z, Varghese BP, Yu H, Dhakal B, LeRoith T, Tuo W, Zhu X. An FcRn-targeted mucosal vaccine against SARS-CoV-2 infection and transmission. bioRxiv 2022:2022.11.23.517678. [PMID: 36451890 PMCID: PMC9709799 DOI: 10.1101/2022.11.23.517678] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
SARS-CoV-2 and its variants cause COVID-19, which is primarily transmitted through droplets and airborne aerosols. To prevent viral infection and reduce viral spread, vaccine strategies must elicit protective immunity in the airways. FcRn transfers IgG across epithelial barriers; we explore FcRn-mediated respiratory delivery of SARS-CoV-2 spike (S). A monomeric IgG Fc was fused to a stabilized S protein; the resulting S-Fc bound to S-specific antibodies (Ab) and FcRn. A significant increase in Ab responses was observed following the intranasal immunization of mice with S-Fc formulated in CpG as compared to the immunization with S alone or PBS. Furthermore, we intranasally immunize adult or aged mice and hamsters with S-Fc. A significant reduction of virus replication in nasal turbinate, lung, and brain was observed following nasal challenges with SARS-CoV-2, including Delta and Omicron variants. Intranasal immunization also significantly reduced viral transmission between immunized and naive hamsters. Protection was mediated by nasal IgA, serum-neutralizing Abs, tissue-resident memory T cells, and bone marrow S-specific plasma cells. Hence FcRn delivers an S-Fc antigen effectively into the airway and induces protection against SARS-CoV-2 infection and transmission. Based on these findings, FcRn-targeted non-invasive respiratory immunizations are superior strategies for preventing highly contagious respiratory viruses from spreading.
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Affiliation(s)
- Weizhong Li
- Division of Immunology, VA-MD College of Veterinary Medicine, *Maryland Pathogen Research Institute, University of Maryland, College Park, MD 20742
| | - Tao Wang
- Division of Immunology, VA-MD College of Veterinary Medicine, *Maryland Pathogen Research Institute, University of Maryland, College Park, MD 20742
| | - Arunraj M. Rajendrakumar
- Division of Immunology, VA-MD College of Veterinary Medicine, *Maryland Pathogen Research Institute, University of Maryland, College Park, MD 20742
- Animal Parasitic Diseases Laboratory, ARS, United States Department of Agriculture, Beltsville, MD 20705
| | - Gyanada Acharya
- Division of Immunology, VA-MD College of Veterinary Medicine, *Maryland Pathogen Research Institute, University of Maryland, College Park, MD 20742
| | - Zizhen Miao
- Division of Immunology, VA-MD College of Veterinary Medicine, *Maryland Pathogen Research Institute, University of Maryland, College Park, MD 20742
| | - Berin P. Varghese
- Division of Immunology, VA-MD College of Veterinary Medicine, *Maryland Pathogen Research Institute, University of Maryland, College Park, MD 20742
| | - Hailiang Yu
- Division of Immunology, VA-MD College of Veterinary Medicine, *Maryland Pathogen Research Institute, University of Maryland, College Park, MD 20742
| | - Bibek Dhakal
- Division of Immunology, VA-MD College of Veterinary Medicine, *Maryland Pathogen Research Institute, University of Maryland, College Park, MD 20742
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland Regional College of Veterinary Medicine, Virginia Tech University, Blacksburg, VA, USA
| | - Wenbin Tuo
- Animal Parasitic Diseases Laboratory, ARS, United States Department of Agriculture, Beltsville, MD 20705
| | - Xiaoping Zhu
- Division of Immunology, VA-MD College of Veterinary Medicine, *Maryland Pathogen Research Institute, University of Maryland, College Park, MD 20742
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17
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Rosa F, Sharma AK, Gurung M, Casero D, Matazel K, Bode L, Simecka C, Elolimy AA, Tripp P, Randolph C, Hand TW, Williams KD, LeRoith T, Yeruva L. Human Milk Oligosaccharides Impact Cellular and Inflammatory Gene Expression and Immune Response. Front Immunol 2022; 13:907529. [PMID: 35844612 PMCID: PMC9278088 DOI: 10.3389/fimmu.2022.907529] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 05/25/2022] [Indexed: 11/13/2022] Open
Abstract
Human milk harbors complex carbohydrates, including human milk oligosaccharides (HMOs), the third most abundant component after lactose and lipids. HMOs have been shown to impact intestinal microbiota, modulate the intestinal immune response, and prevent pathogenic bacterial binding by serving as decoy receptors. However, the direct effect of HMOs on intestinal function and immunity remains to be elucidated. To address this knowledge gap, 21-day-old germ-free mice (C57BI/6) were orally gavaged with 15 mg/day of pooled HMOs for 7 or 14 days and euthanized at day 28 or 35. A set of mice was maintained until day 50 to determine the persistent effects of HMOs. Control groups were maintained in the isolators for 28, 35, or 50 days of age. At the respective endpoints, intestinal tissues were subjected to histomorphometric and transcriptomic analyses, while the spleen and mesenteric lymph nodes (MLNs) were subjected to flow cytometric analysis. The small intestine (SI) crypt was reduced after HMO treatment relative to control at days 28 and 35, while the SI villus height and large intestine (LI) gland depth were decreased in the HMO-treated mice relative to the control at day 35. We report significant HMO-induced and location-specific gene expression changes in host intestinal tissues. HMO treatment significantly upregulated genes involved in extracellular matrix, protein ubiquitination, nuclear transport, and mononuclear cell differentiation. CD4+ T cells were increased in both MLNs and the spleen, while CD8+ T cells were increased in the spleen at day 50 in the HMO group in comparison to controls. In MLNs, plasma cells were increased in HMO group at days 28 and 35, while in the spleen, only at day 28 relative to controls. Macrophages/monocytes and neutrophils were lower in the spleen of the HMO group at days 28, 35, and 50, while in MLNs, only neutrophils were lower at day 50 in the 14-day HMO group. In addition, diphtheria toxoid and tetanus toxoid antibody-secreting cells were higher in HMO-supplemented group compared to controls. Our data suggest that HMOs have a direct effect on gastrointestinal tract metabolism and the immune system even in the absence of host microbiota.
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Affiliation(s)
- Fernanda Rosa
- Arkansas Children’s Nutrition Center, United States Department of Agriculture-Agricultural Research Service (USDA-ARS), Little Rock, AR, United States
- School of Veterinary Medicine, Texas Tech University, Amarillo, TX, United States
| | - Ashok K. Sharma
- Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai, Los Angeles, CA, United States
| | - Manoj Gurung
- Arkansas Children’s Nutrition Center, United States Department of Agriculture-Agricultural Research Service (USDA-ARS), Little Rock, AR, United States
| | - David Casero
- Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai, Los Angeles, CA, United States
| | - Katelin Matazel
- Arkansas Children’s Nutrition Center, United States Department of Agriculture-Agricultural Research Service (USDA-ARS), Little Rock, AR, United States
| | - Lars Bode
- Larsson-Rosenquist Foundation Mother-Milk-Infant Center of Research Excellence, University of California San Diego, La Jolla, CA, United States
- Department of Pediatrics, University of California San Diego, La Jolla, CA, United States
| | - Christy Simecka
- Division of Laboratory Animal Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, United States
| | - Ahmed A. Elolimy
- Arkansas Children’s Nutrition Center, United States Department of Agriculture-Agricultural Research Service (USDA-ARS), Little Rock, AR, United States
- Animal Production Department, National Research Centre, Giza, Egypt
| | - Patricia Tripp
- Arkansas Children’s Nutrition Center, United States Department of Agriculture-Agricultural Research Service (USDA-ARS), Little Rock, AR, United States
| | - Christopher Randolph
- Center for Translational Pediatric Research, Arkansas Children’s Research Institute, Little Rock, AR, United States
| | - Timothy W. Hand
- University of Pittsburgh School of Medicine, R.K. Mellon Foundation Institute for Pediatric Research, University of Pittsburgh Medical Center (UPMC) Children’s Hospital of Pittsburgh, Pittsburgh, PA, United States
| | - Keith D. Williams
- Department of Biostatistics, University of Arkansas for Medical Sciences, Little Rock, AR, United States
| | - Tanya LeRoith
- Department of Biomedical Sciences & Pathobiology, Virginia Tech, Blacksburg, VA, United States
| | - Laxmi Yeruva
- Arkansas Children’s Nutrition Center, United States Department of Agriculture-Agricultural Research Service (USDA-ARS), Little Rock, AR, United States
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18
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Piccolo BD, Graham JL, Kang P, Randolph CE, Shankar K, Yeruva L, Fox R, Robeson MS, Moody B, LeRoith T, Stanhope KL, Adams SH, Havel PJ. Progression of diabetes is associated with changes in the ileal transcriptome and ileal-colon morphology in the UC Davis Type 2 Diabetes Mellitus rat. Physiol Rep 2021; 9:e15102. [PMID: 34806320 PMCID: PMC8606862 DOI: 10.14814/phy2.15102] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 10/15/2021] [Accepted: 10/18/2021] [Indexed: 12/12/2022] Open
Abstract
Deterioration in glucose homeostasis has been associated with intestinal dysbiosis, but it is not known how metabolic dysregulation alters the gastrointestinal environment. We investigated how the progression of diabetes alters ileal and colonic epithelial mucosal structure, microbial abundance, and transcript expression in the University of California Davis Type 2 Diabetes Mellitus (UCD-T2DM) rat model. Male UCD-T2DM rats (age ~170 days) were included if <1-month (n = 6, D1M) or 3-month (n = 6, D3M) post-onset of diabetes. Younger nondiabetic UCD-T2DM rats were included as a nondiabetic comparison (n = 6, ND, age ~70 days). Ileum villi height/crypt depths and colon crypt depths were assessed by histology. Microbial abundance of colon content was measured with 16S rRNA sequencing. Ileum and colon transcriptional abundances were analyzed using RNA sequencing. Ileum villi height and crypt depth were greater in D3M rats compared to ND. Colon crypt depth was greatest in D3M rats compared to both ND and D1M rats. Colon abundances of Akkermansia and Muribaculaceae were lower in D3M rats relative to D1M, while Oscillospirales, Phascolarctobacterium, and an unidentified genus of Lachnospiraceae were higher. Only two transcripts were altered by diabetes advancement within the colon; however, 2039 ileal transcripts were altered. Only colonic abundances of Sptlc3, Enpp7, Slc7a15, and Kctd14 had more than twofold changes between D1M and D3M rats. The advancement of diabetes in the UCD-T2DM rat results in a trophic effect on the mucosal epithelia and was associated with regulation of gastrointestinal tract RNA expression, which appears more pronounced in the ileum relative to the colon.
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Affiliation(s)
- Brian D. Piccolo
- USDA‐ARS Arkansas Children's Nutrition CenterLittle RockArkansasUSA
- Department of PediatricsUniversity of Arkansas for Medical SciencesLittle RockArkansasUSA
| | - James L. Graham
- Department of Molecular BiosciencesSchool of Veterinary MedicineUniversity of California DavisDavisCaliforniaUSA
- Department of NutritionUniversity of California DavisDavisCaliforniaUSA
| | - Ping Kang
- USDA‐ARS Arkansas Children's Nutrition CenterLittle RockArkansasUSA
| | - Christopher E. Randolph
- Center for Translational Pediatric ResearchArkansas Children's Research InstituteLittle RockArkansasUSA
| | - Kartik Shankar
- Department of PediatricsSection of NutritionUniversity of Colorado School of MedicineAnschutz Medical CampusAuroraColoradoUSA
| | - Laxmi Yeruva
- USDA‐ARS Arkansas Children's Nutrition CenterLittle RockArkansasUSA
- Department of PediatricsUniversity of Arkansas for Medical SciencesLittle RockArkansasUSA
- Arkansas Children's Research InstituteLittle RockArkansasUSA
| | - Renee Fox
- USDA‐ARS Arkansas Children's Nutrition CenterLittle RockArkansasUSA
| | - Michael S. Robeson
- Department of Biomedical InformaticsUniversity of Arkansas for Medical SciencesLittle RockArkansasUSA
| | - Becky Moody
- USDA‐ARS Arkansas Children's Nutrition CenterLittle RockArkansasUSA
| | - Tanya LeRoith
- Department of Biomedical Science and PathobiologyVirginia Polytechnic Institute and State UniversityBlacksburgVirginiaUSA
| | - Kimber L. Stanhope
- Department of Molecular BiosciencesSchool of Veterinary MedicineUniversity of California DavisDavisCaliforniaUSA
- Department of NutritionUniversity of California DavisDavisCaliforniaUSA
| | - Sean H. Adams
- Department of SurgeryUniversity of California Davis School of MedicineSacramentoCaliforniaUSA
- Center for Alimentary and Metabolic ScienceUniversity of California Davis School of MedicineSacramentoCaliforniaUSA
| | - Peter J. Havel
- Department of Molecular BiosciencesSchool of Veterinary MedicineUniversity of California DavisDavisCaliforniaUSA
- Department of NutritionUniversity of California DavisDavisCaliforniaUSA
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19
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Hay AN, Wagner B, Leeth CM, LeRoith T, Cecere TE, Lahmers KK, Andrews FM, Werre SR, Johnson AL, Clark CK, Pusterla N, Reed SM, Lindsay DS, Taylor S, Estell KE, Furr M, MacKay RJ, Del Piero F, Witonsky SG. Horses affected by EPM have increased sCD14 compared to healthy horses. Vet Immunol Immunopathol 2021; 242:110338. [PMID: 34717126 DOI: 10.1016/j.vetimm.2021.110338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 10/05/2021] [Accepted: 10/11/2021] [Indexed: 11/29/2022]
Abstract
Equine protozoal myeloencephalitis (EPM) is a debilitating neurologic disease affecting horses across the Americas. Gaps in understanding the inflammatory immune response in EPM-affected horses create difficulties with diagnosis and treatment, subsequently negatively impacting the prognosis of affected horses. The purpose of the current study was to evaluate circulating levels of the inflammatory immune marker soluble CD14 (sCD14), in horses with EPM (n = 7) and determine if they differed from healthy neurologically normal horses (n = 6). Paired sera and cerebrospinal fluid (CSF) samples were analyzed for sCD14. Inclusion criteria for EPM horses consisted of the presence of neurologic signs consistent with EPM, Sarcocystis neurona surface antigens 2, 4/3 (SnSAG 2, 4/3) ELISA serum: CSF antibody ratio ≤ 100, and a postmortem diagnosis of EPM. Control horses were neurologically normal, healthy horses with SnSAG 2, 4/3 ELISA serum: CSF antibody ratios of > 100. Serum anti-Sarcocystis neurona antibodies indicate that healthy control horses were exposed to S. neurona but resistant to developing clinical EPM. EPM cases had significantly greater concentrations of sCD14 in CSF samples compared to control horses and increased serum sCD14 concentrations. A positive correlation between sCD14 serum and CSF concentrations was observed in EPM-affected horses but not healthy horses. Soluble CD14 is an inflammatory marker, and the study results suggest it is elevated in EPM patients. When performed in conjunction with clinical evaluation and standard antibody testing, there may be potential for sCD14 to be utilized as a correlate for EPM.
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Affiliation(s)
- Alayna N Hay
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Bettina Wagner
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY, USA
| | - Caroline M Leeth
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia- Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA
| | - Thomas E Cecere
- Department of Biomedical Sciences and Pathobiology, Virginia- Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA
| | - Kevin K Lahmers
- Department of Biomedical Sciences and Pathobiology, Virginia- Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA
| | - Frank M Andrews
- Equine Health Studies Program, Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
| | - Stephen R Werre
- Department of Population Health Sciences, Virginia- Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA
| | - Amy L Johnson
- Department of Clinical Studies, University of Pennsylvania, School of Veterinary Medicine, New Bolton Center, Kennett Square, PA, USA
| | | | - Nicola Pusterla
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, Davis, CA, USA
| | | | - David S Lindsay
- Department of Biomedical Sciences and Pathobiology, Virginia- Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA
| | - Sandra Taylor
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, USA
| | - Krista E Estell
- Department of Large Animal Clinical Sciences, Marion duPont Scott Equine Medical Center, Leesburg, VA, USA
| | - Martin Furr
- Department of Physiological Sciences, Center for Veterinary Health Sciences, Oklahoma State University, Stillwater, OK, USA
| | - Robert J MacKay
- Department of Large Animal Clinical Sciences, University of Florida, Gainesville, FL, USA
| | - Fabio Del Piero
- Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
| | - Sharon G Witonsky
- Department of Large Animal Clinical Sciences, Virginia- Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA.
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20
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Rai P, Chuong C, LeRoith T, Smyth JW, Panov J, Levi M, Kehn-Hall K, Duggal NK, Lucarelli JW. Adenovirus transduction to express human ACE2 causes obesity-specific morbidity in mice, impeding studies on the effect of host nutritional status on SARS-CoV-2 pathogenesis. Virology 2021; 563:98-106. [PMID: 34509029 PMCID: PMC8414371 DOI: 10.1016/j.virol.2021.08.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 08/27/2021] [Accepted: 08/31/2021] [Indexed: 01/08/2023]
Abstract
The COVID-19 pandemic has paralyzed the global economy and resulted in millions of deaths globally. People with co-morbidities like obesity, diabetes and hypertension are at an increased risk for severe COVID-19 illness. This is of overwhelming concern because 42% of Americans are obese, 30% are pre-diabetic and 9.4% have clinical diabetes. Here, we investigated the effect of obesity on disease severity following SARS-CoV-2 infection using a well-established mouse model of diet-induced obesity. Diet-induced obese and lean control C57BL/6 N mice, transduced for ACE2 expression using replication-defective adenovirus, were infected with SARS-CoV-2, and monitored for lung pathology, viral titers, and cytokine expression. No significant differences in tissue pathology or viral replication was observed between AdV transduced lean and obese groups, infected with SARS-CoV-2, but certain cytokines were expressed more significantly in infected obese mice compared to the lean ones. Notably, significant weight loss was observed in obese mice treated with the adenovirus vector, independent of SARS-CoV-2 infection, suggesting an obesity-dependent morbidity induced by the vector. These data indicate that the adenovirus-transduced mouse model of SARS-CoV-2 infection, as described here and elsewhere, may be inappropriate for nutrition studies.
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Affiliation(s)
- Pallavi Rai
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, USA
| | - Christina Chuong
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, USA
| | - James W Smyth
- Center for Heart and Reparative Medicine, Fralin Biomedical Research Institute, Roanoke, VA, USA; Department of Biological Sciences, College of Science, Virginia Polytechnic State Institute and State University, Blacksburg, VA, USA; Department of Basic Science Education, Virginia Tech Carilion School of Medicine, Roanoke, VA, USA
| | - Julia Panov
- Tauber Bioinformatics Research Center, Haifa 3498838, Israel; Sagol Department of Neurobiology, University of Haifa, Haifa 3498838, Israel
| | - Moshe Levi
- Department of Biochemistry and Molecular & Cellular Biology, Georgetown University, Washington, DC, USA
| | - Kylene Kehn-Hall
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, USA
| | - Nisha K Duggal
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, USA
| | - James-Weger Lucarelli
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, USA.
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21
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Hay AN, Potter A, Lindsay D, LeRoith T, Zhu J, Cashwell S, Witonsky S, Leeth C. Interferon gamma protective against Sarcocystis neurona encephalitis in susceptible murine model. Vet Immunol Immunopathol 2021; 240:110319. [PMID: 34474260 DOI: 10.1016/j.vetimm.2021.110319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 07/30/2021] [Accepted: 08/26/2021] [Indexed: 11/27/2022]
Abstract
Sarcocystis neurona is the predominant etiological agent of the infectious equine neurologic disease, equine protozoal myeloencephalitis (EPM), which is prevalent in the United States. A wealth of knowledge about S. neurona biology and its life cycle has accumulated over the last several decades. However, much remains unknown about the aberrant equine host's immune response to S. neurona and the relatively high prevalence of exposure to the protozoa but relatively infrequent occurrence of clinical neurologic disease. Mouse models simulating EPM are commonly used to study the disease due to numerous challenges associated with studying the disease in horses. The critical role of the cytokine, interferon gamma (IFNγ), in protection against S. neurona encephalitis has been well established as Ifnγ-/- mice are highly susceptible to S. neurona encephalitis. However, there are discrepancies in the literature regarding S. neurona disease susceptibility in lymphocyte deficient mice, lacking T-lymphocytes and their associated Ifnγ production. In the current study, we investigated S. neurona encephalitis susceptibility in 2 genetically different strains of lymphocyte null mice, C57Bl/6 (B6).scid and Balb/c.scid. The B6.scid mouse was determined to be susceptible to S. neurona encephalitis as 100 % of infected mice developed neurologic disease within 60 days post infection (DPI). The Balb/c.scid mouse was nearly disease resistant as only 10 % of mice developed neurologic disease 60 DPI. Encephalitis was histologically demonstrable and S. neurona was identified in cerebellar samples collected from B6.scid but absent in Balb/c.scid mice. To further investigate the importance of T-lymphocyte derived Ifnγ, T- lymphocytes were adoptively transferred into B6.scid mice. The adoptive transfer of Ifnγ competent T- lymphocytes offered complete protection against S. neurona encephalitis but transfer of Ifnγ deficient T- lymphocytes did not with 100 % of these recipient mice succumbing to S. neruona encephalitis. Histological analysis of collected cerebellar samples confirmed the presences of S. neurona and encephalitis in recipient mice that developed neurologic disease. These studies show that the background strain is critical in studying SCID susceptibility to S. neurona disease and suggest a protective role of Ifnγ producing T- lymphocytes in S. neurona encephalitis susceptible mice.
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Affiliation(s)
- Alayna N Hay
- Virginia Tech, Department of Animal and Poultry Sciences, 175 West Campus Drive, 3280 Litton Reaves Hall, Blacksburg, VA, 24061, United States
| | - Ashley Potter
- Virginia Tech, Department of Animal and Poultry Sciences, 175 West Campus Drive, 3280 Litton Reaves Hall, Blacksburg, VA, 24061, United States
| | - David Lindsay
- Department of Biomedical Sciences and Pathobiology, Virginia- Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, 24061, United States
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia- Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, 24061, United States
| | - Jing Zhu
- Virginia Tech, Department of Animal and Poultry Sciences, 175 West Campus Drive, 3280 Litton Reaves Hall, Blacksburg, VA, 24061, United States
| | - Sarah Cashwell
- Virginia Tech, Department of Animal and Poultry Sciences, 175 West Campus Drive, 3280 Litton Reaves Hall, Blacksburg, VA, 24061, United States
| | - Sharon Witonsky
- Department of Large Animal Clinical Sciences, Virginia- Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, 24061, United States
| | - Caroline Leeth
- Virginia Tech, Department of Animal and Poultry Sciences, 175 West Campus Drive, 3280 Litton Reaves Hall, Blacksburg, VA, 24061, United States.
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22
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Kuchinsky SC, Frere F, Heitzman-Breen N, Golden J, Vázquez A, Honaker CF, Siegel PB, Ciupe SM, LeRoith T, Duggal NK. Pathogenesis and shedding of Usutu virus in juvenile chickens. Emerg Microbes Infect 2021; 10:725-738. [PMID: 33769213 PMCID: PMC8043533 DOI: 10.1080/22221751.2021.1908850] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Usutu virus (USUV; family: Flaviviridae, genus: Flavivirus), is an emerging zoonotic arbovirus that causes severe neuroinvasive disease in humans and has been implicated in the loss of breeding bird populations in Europe. USUV is maintained in an enzootic cycle between ornithophilic mosquitos and wild birds. As a member of the Japanese encephalitis serocomplex, USUV is closely related to West Nile virus (WNV) and St. Louis encephalitis virus (SLEV), both neuroinvasive arboviruses endemic in wild bird populations in the United States. An avian model for USUV is essential to understanding zoonotic transmission. Here we describe the first avian models of USUV infection with the development of viremia. Juvenile commercial ISA Brown chickens were susceptible to infection by multiple USUV strains with evidence of cardiac lesions. Juvenile chickens from two chicken lines selected for high (HAS) or low (LAS) antibody production against sheep red blood cells showed markedly different responses to USUV infection. Morbidity and mortality were observed in the LAS chickens, but not HAS chickens. LAS chickens had significantly higher viral titers in blood and other tissues, as well as oral secretions, and significantly lower development of neutralizing antibody responses compared to HAS chickens. Mathematical modelling of virus-host interactions showed that the viral clearance rate is a stronger mitigating factor for USUV viremia than neutralizing antibody response in this avian model. These chicken models provide a tool for further understanding USUV pathogenesis in birds and evaluating transmission dynamics between avian hosts and mosquito vectors.
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Affiliation(s)
- Sarah C Kuchinsky
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Francesca Frere
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Nora Heitzman-Breen
- Department of Mathematics, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Jacob Golden
- Department of Biological Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Ana Vázquez
- National Centre for Microbiology, Instituto de Salud Carlos III (ISCIII), Epidemiology and Public Health Network of Biomedical Research Centre (CIBERESP), Madrid, Spain
| | - Christa F Honaker
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Paul B Siegel
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Stanca M Ciupe
- Department of Mathematics, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Nisha K Duggal
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
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23
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Stevenson VB, Perry SN, Todd M, Huckle WR, LeRoith T. PD-1, PD-L1, and PD-L2 Gene Expression and Tumor Infiltrating Lymphocytes in Canine Melanoma. Vet Pathol 2021; 58:692-698. [PMID: 34169800 DOI: 10.1177/03009858211011939] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Melanoma in humans and dogs is considered highly immunogenic; however, the function of tumor-infiltrating lymphocytes (TILs) is often suppressed in the tumor microenvironment. In humans, current immunotherapies target checkpoint molecules (such as PD-L1, expressed by tumor cells), inhibiting their suppressive effect over TILs. The role of PD-L2, an alternative PD-1 ligand also overexpressed in malignant tumors and in patients with anti-PD-L1 resistance, remains poorly understood. In the current study, we evaluated the expression of checkpoint molecule mRNAs in canine melanoma and TILs. Analysis of checkpoint molecule gene expression was performed by RT-qPCR (real-time quantitative polymerase chain reaction) using total RNA isolated from formalin-fixed and paraffin-embedded melanomas (n = 22) and melanocytomas (n = 9) from the Virginia Tech Animal Laboratory Services archives. Analysis of checkpoint molecule expression revealed significantly higher levels of PDCD1 (PD-1) and CD274 (PD-L1) mRNAs and an upward trend in PDCD1LG2 (PD-L2) mRNA in melanomas relative to melanocytomas. Immunohistochemistry revealed markedly increased numbers of CD3+ T cells in the highest PD-1-expressing subgroup of melanomas compared to the lowest PD-1 expressors, whereas densities of IBA1+ cells (macrophages) were similar in both groups. CD79a+ cell numbers were low for both groups. As in human melanoma, overexpression of the PD-1/PD-L1/PD-L2 axis is a common feature of canine melanoma. High expression of PD-1 and PD-L1 correlates with increased numbers of CD3+ cells. Additionally, the high level of IBA1+ cells in melanomas with low PD-1 expression and low CD3+ cells levels suggest that the expression of checkpoint molecules is modulated by interactions between T cells and cancer cells rather than histiocytes.
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Tian D, Subramaniam S, Heffron CL, Mahsoub HM, Sooryanarain H, Wang B, Cao QM, Hassebroek A, LeRoith T, Foss DL, Calvert JG, Meng XJ. Construction and efficacy evaluation of novel swine leukocyte antigen (SLA) class I and class II allele-specific poly-T cell epitope vaccines against porcine reproductive and respiratory syndrome virus. J Gen Virol 2021; 101:1191-1201. [PMID: 32894211 DOI: 10.1099/jgv.0.001492] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) causes an economically important global swine disease. Here we report the development of subunit PRRSV-2 vaccines by expressing swine leucocyte antigen (SLA) class I and class II allele-specific epitope antigens in a robust adenovirus vector. SLA I-specific CD8 and SLA II-specific CD4 T cell epitopes of PRRSV-2 NADC20 were predicted in silico. Stable murine leukaemia cell lines (RMA-S), which are TAP-deficient and lacking endogenous class I epitope loading, were established to express different SLA I alleles. The binding stability of PRRSV T cell epitope peptides with SLA I alleles expressed on RMA-S cells was characterized. Two PRRSV poly-T cell epitope peptides were designed. NADC20-PP1 included 39 class I epitopes, consisting of 8 top-ranked epitopes specific to each of 5 SLA I alleles, and fused to 5 class II epitopes specific to SLA II alleles. NADC20-PP2, a subset of PP1, included two top-ranked class I epitopes specific to each of the five SLA I alleles. Two vaccine candidates, Ad-NADC20-PP1 and Ad-NADC20-PP2, were constructed by expressing the polytope peptides in a replication-incompetent human adenovirus 5 vector. A vaccination and challenge study in 30 piglets showed that animals vaccinated with the vaccines had numerically lower gross and histopathology lung lesions, and numerically lower PRRSV RNA loads in lung and serum after challenge compared to the controls, although there was no statistical significance. The results suggested that the Ad-NADC20-PP1 and Ad-NADC20-PP2 vaccines provided little or no protection, further highlighting the tremendous challenges faced in developing an effective subunit PRRSV-2 vaccine.
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Affiliation(s)
- Debin Tian
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Sakthivel Subramaniam
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - C Lynn Heffron
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Hassan M Mahsoub
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Harini Sooryanarain
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Bo Wang
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Qian M Cao
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Anna Hassebroek
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | | | | | - Xiang-Jin Meng
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
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Chuong C, Bates TA, Akter S, Werre SR, LeRoith T, Weger-Lucarelli J. Nutritional status impacts dengue virus infection in mice. BMC Biol 2020; 18:106. [PMID: 32854687 PMCID: PMC7453574 DOI: 10.1186/s12915-020-00828-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 07/11/2020] [Indexed: 01/09/2023] Open
Abstract
Background Dengue virus (DENV) is estimated to infect 390 million people annually. However, few host factors that alter disease severity are known. Malnutrition, defined as both over- and undernutrition, is a growing problem worldwide and has long been linked to dengue disease severity by epidemiological and anecdotal observations. Accordingly, we sought to establish a mouse model to assess the impact of nutritional status on DENV disease severity. Results Using transiently immunocompromised mice, we established a model of mild dengue disease with measurable viremia. We then applied it to study the effects of healthy weight, obese, and low-protein diets representing normal, over-, and undernutrition, respectively. Upon infection with DENV serotype 2, obese mice experienced more severe morbidity in the form of weight loss and thrombocytopenia compared to healthy weight groups. Additionally, obesity altered cytokine expression following DENV infection. Although low protein-fed mice did not lose significant weight after DENV2 infection, they also experienced a reduction in platelets as well as increased spleen pathology and viral titers. Conclusions Our results indicate that obese or undernourished mice incur greater disease severity after DENV infection. These studies establish a role for nutritional status in DENV disease severity.
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Affiliation(s)
- Christina Chuong
- Department of Biomedical Sciences and Pathobiology, VA-MD College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA
| | - Tyler A Bates
- Department of Biomedical Sciences and Pathobiology, VA-MD College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA
| | - Shamima Akter
- Department of Biomedical Sciences and Pathobiology, VA-MD College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA.,Present Address: Department of Bioinformatics and Computational Biology, School of Systems Biology, George Mason University, Fairfax, VA, USA
| | - Stephen R Werre
- Department of Population Health Sciences, VA-MD College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, VA-MD College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA
| | - James Weger-Lucarelli
- Department of Biomedical Sciences and Pathobiology, VA-MD College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, USA.
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Zajac A, Fairman D, McGee E, Wells B, Peregrine A, Jenkins E, LeRoith T, St John B. Alveolar echinococcosis in a dog in the eastern United States. J Vet Diagn Invest 2020; 32:742-746. [PMID: 32715926 DOI: 10.1177/1040638720943842] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
An 8-y-old Labrador Retriever was presented to a small animal practice in northern Virginia with a history of recent lethargy. Physical examination findings were unremarkable. Ultrasound revealed several large hepatic masses and multiple smaller masses involving the pancreas. Cytologic findings on fine-needle aspirates of the hepatic masses included inflammation and necrosis with eosinophilic, membranous oval structures consistent with cestode infection. Histopathologic findings for biopsies of these masses included extensive necrosis, inflammation, and PAS-positive hyaline-like membranous material interpreted as metacestode cyst wall. A PCR product was generated from aspirate material using primers specific for Echinococcus multilocularis. Subsequent sequence data were 100% homologous to E. multilocularis NADH dehydrogenase subunit I gene sequences. The dog received daily oral albendazole (10 mg/kg) treatment, but its condition deteriorated, and the dog was euthanized. The dog, born in Mississippi, was brought as a puppy to Virginia with no other travel history. To our knowledge, alveolar echinococcosis has not been reported previously in a dog in the United States; E. multilocularis infection was apparently acquired in the mid-Atlantic region of the United States.
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Affiliation(s)
- Anne Zajac
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
| | - Donald Fairman
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
| | - Evan McGee
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
| | - Bridgette Wells
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
| | - Andrew Peregrine
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
| | - Emily Jenkins
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
| | - Tanya LeRoith
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
| | - Bethany St John
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
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Lu Y, Clark-Deener S, Gillam F, Heffron CL, Tian D, Sooryanarain H, LeRoith T, Zoghby J, Henshaw M, Waldrop S, Pittman J, Meng XJ, Zhang C. Virus-like particle vaccine with B-cell epitope from porcine epidemic diarrhea virus (PEDV) incorporated into hepatitis B virus core capsid provides clinical alleviation against PEDV in neonatal piglets through lactogenic immunity. Vaccine 2020; 38:5212-5218. [PMID: 32565343 DOI: 10.1016/j.vaccine.2020.06.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 05/25/2020] [Accepted: 06/04/2020] [Indexed: 01/27/2023]
Abstract
Porcine epidemic diarrhea virus (PEDV) has had a negative economic impact on the global swine industry for decades since its first emergence in the 1970s in Europe. In 2013, PEDV emerged for the first time in the United States, causing immense economic losses to the swine industry. Efforts to protect U.S. swine herds from PEDV infection and limit PEDV transmission through vaccination had only limited success so far. Following the previous success in our virus-like particle (VLP) based vaccine in mouse model, in this study we determined the immunogenicity and protective efficacy of a VLP-based vaccine containing B-cell epitope 748YSNIGVCK755 from the spike protein of PEDV incorporated into the hepatitis B virus core capsid (HBcAg), in a comprehensive pregnant gilt vaccination and piglet challenge model. The results showed that the vaccine was able to induce significantly higher virus neutralization response in gilt milk, and provide alleviation of clinical signs for piglets experimentally infected with PEDV. Piglets from pregnant gilt that was vaccinated with the VLP vaccine had faster recovery from the clinical disease, less small intestinal lesions, and higher survival rate at 10 days post-challenge (DPC).
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Affiliation(s)
- Yi Lu
- Department of Biological Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
| | - Sherrie Clark-Deener
- Department of Large Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
| | - Frank Gillam
- Department of Biological Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
| | - Connie Lynn Heffron
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
| | - Debin Tian
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
| | - Harini Sooryanarain
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
| | - Jessica Zoghby
- Doctor of Veterinary Medicine Professional Program, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
| | - Mallori Henshaw
- Doctor of Veterinary Medicine Professional Program, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
| | - Steven Waldrop
- Doctor of Veterinary Medicine Professional Program, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
| | - Jeremy Pittman
- Smithfield Foods, Inc., 434 E Main St., Waverly, VA 23890, USA.
| | - Xiang-Jin Meng
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
| | - Chenming Zhang
- Department of Biological Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
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Abstract
CLINICAL PRESENTATION A 6-month-old female spayed domestic shorthair cat was presented for investigation of acute right hindlimb lameness and paresis. WHAT IS YOUR DIAGNOSIS? Readers are encouraged to review the case history and consider what their diagnostic suspicion is. Also what is the preferred treatment for this injury? And what is the primary cause of this injury?
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Affiliation(s)
- Michael Nappier
- 1 Department of Small Animal Clinical Sciences, Virginia Maryland College of Veterinary Medicine, Blacksburg, Virginia, USA
| | - Brooke Robertson
- 1 Department of Small Animal Clinical Sciences, Virginia Maryland College of Veterinary Medicine, Blacksburg, Virginia, USA
| | - Tanya LeRoith
- 2 Department of Biomedical Sciences and Pathobiology, Virginia Maryland College of Veterinary Medicine, Blacksburg, Virginia, USA
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Abdelhamid L, Cabana-Puig X, Swartwout B, Lee J, Li S, Sun S, Li Y, Ross AC, Cecere TE, LeRoith T, Wang H, Reilly CM, Luo XM. Retinoic acid exerts disease stage-dependent and tissue-specific effects on pristane-induced lupus. The Journal of Immunology 2020. [DOI: 10.4049/jimmunol.204.supp.236.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
We previously showed that all-trans-retinoic acid (tRA) exacerbated pre-existing autoimmunity in lupus; however, its effects before disease onset are unknown. Here, using a pristane-induced model, we show that tRA exerts tissue-specific effects when given at the initiation vs. continuation phase of lupus. Pre-pristane treatment with tRA aggravated glomerulonephritis through increasing renal expression of pro-fibrotic protein laminin β1, activating bone marrow CD11b- conventional dendritic cells, increasing the splenic CD4:CD8 ratio, and upregulating the interaction of ICAM-1 and LFA-1 that led to the infiltration of inflammatory cells to the spleen. Transcriptomic analysis revealed that prior to lupus induction, tRA significantly upregulated genes associated with cell differentiation, activation, and migration. Moreover, compared to pristane alone, tRA pre-treatment potentiated, whereas tRA post-treatment significantly suppressed, the renal expression of proinflammatory TNF-α, IL-1β, CCL2, and CCL3. While it may benefit the kidney, post-pristane treatment with tRA worsened the onset and severity of pristane-induced arthritis through promoting neutrophil and mononuclear cell infiltration into the joints. Together, these findings suggest that tRA supplementation regardless of the time of administration promotes chemokine-driven migration and tissue-specific infiltration of inflammatory cells, thereby exacerbating lupus-associated kidney or joint inflammation. Interestingly, both pre- and post-treatments with tRA modulated the gut microbiota in a similar fashion, suggesting a gut microbiota-independent mechanism by which tRA affects the initiation vs. continuation phase of lupus.
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Affiliation(s)
| | | | | | | | - Song Li
- 1Virginia Polytechnic Inst. and State Univ
| | - Sha Sun
- 2University of California, Irvine
| | - Yaqi Li
- 3Pennsylvania State University
| | | | | | | | - Haifeng Wang
- 4College of Animal Science, Zhejiang University, China
| | | | - Xin M. Luo
- 1Virginia Polytechnic Inst. and State Univ
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Abdelhamid L, Cabana-Puig X, Swartwout B, Lee J, Li S, Sun S, Li Y, Ross AC, Cecere TE, LeRoith T, Werre SR, Wang H, Reilly CM, Luo XM. Retinoic Acid Exerts Disease Stage-Dependent Effects on Pristane-Induced Lupus. Front Immunol 2020; 11:408. [PMID: 32265909 PMCID: PMC7103630 DOI: 10.3389/fimmu.2020.00408] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 02/21/2020] [Indexed: 12/17/2022] Open
Abstract
We previously showed that all-trans-retinoic acid (tRA), an active metabolite of vitamin A, exacerbated pre-existing autoimmunity in lupus; however, its effects before the development of autoimmunity are unknown. Here, using a pristane-induced model, we show that tRA exerts differential effects when given at the initiation vs. continuation phase of lupus. Unlike tRA treatment during active disease, pre-pristane treatment with tRA aggravated glomerulonephritis through increasing renal expression of pro-fibrotic protein laminin β1, activating bone marrow conventional dendritic cells (cDCs), and upregulating the interaction of ICAM-1 and LFA-1 in the spleen, indicating an active process of leukocyte activation and trafficking. Transcriptomic analysis revealed that prior to lupus induction, tRA significantly upregulated the expression of genes associated with cDC activation and migration. Post-pristane tRA treatment, on the other hand, did not significantly alter the severity of glomerulonephritis; rather, it exerted immunosuppressive functions of decreasing circulatory and renal deposition of autoantibodies as well as suppressing the renal expression of proinflammatory cytokines and chemokines. Together, these findings suggest that tRA differentially modulate lupus-associated kidney inflammation depending on the time of administration. Interestingly, both pre- and post-pristane treatments with tRA reversed pristane-induced leaky gut and modulated the gut microbiota in a similar fashion, suggesting a gut microbiota-independent mechanism by which tRA affects the initiation vs. continuation phase of lupus.
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Affiliation(s)
- Leila Abdelhamid
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Xavier Cabana-Puig
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Brianna Swartwout
- Translational Biology, Medicine and Health Graduate Program, Virginia Polytechnic Institute and State University, Roanoke, VA, United States
| | - Jiyoung Lee
- Department of Crop and Soil Environmental Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Song Li
- Department of Crop and Soil Environmental Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Sha Sun
- Department of Development and Cell Biology, University of California, Irvine, Irvine, CA, United States
| | - Yaqi Li
- Department of Nutritional Sciences, Pennsylvania State University, University Park, PA, United States
| | - A Catharine Ross
- Department of Nutritional Sciences, Pennsylvania State University, University Park, PA, United States
| | - Thomas E Cecere
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Stephen R Werre
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Haifeng Wang
- College of Animal Science, Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou, China
| | - Christopher M Reilly
- Department of Cell Biology and Physiology, Edward via College of Osteopathic Medicine, Blacksburg, VA, United States
| | - Xin M Luo
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
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Zhu J, Hay AN, Potter AA, Richwine MW, Sproule T, LeRoith T, Wilson J, Hasham MG, Roopenian DC, Leeth CM. Abrogated AID Function Prolongs Survival and Diminishes Renal Pathology in the BXSB Mouse Model of Systemic Lupus Erythematosus. J Immunol 2020; 204:1091-1100. [PMID: 31988182 DOI: 10.4049/jimmunol.1900501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 12/22/2019] [Indexed: 12/31/2022]
Abstract
Almost a decade has passed since the approval of belimumab, an mAb directed against B lymphocyte stimulation and the first targeted therapy approved for systemic lupus erythematous (SLE) in over 50 y. Although well tolerated, the efficacy of belimumab remains limited and is not labeled for patients suffering from nephritis, the leading cause of patient mortality. We sought to explore alternative targets of autoreactive B lymphocytes through manipulation of affinity maturation. The BXSB/MpJ mouse, a well-established model of human SLE, develops elevated antinuclear Abs and immune complex-mediated nephritis along with other manifestations of SLE-like disease. To limit interfering with critical background genetics, we used CRISPR-Cas9 to disrupt activation-induced cytidine deaminase (AID; Aicda) directly in BXSB zygotes. Homozygous null mice demonstrated significantly prolonged survival compared with wild-type. Although mice continued to develop plasma cells, splenic follicular structure was restored, and renal pathology was reduced. Mice developed expanded germinal center B lymphocyte populations as in other models of AID deficiency as well as increased populations of CD73+ B lymphocytes. Treatment with the small molecule inhibitor of RAD51, 4,4'-diisothiocyano-2,2'-stilbenedisulfonic acid, resulted in minimal changes in disease markers in BXSB mice. The prolonged survival in AID-deficient BXSB mice appears attributed primarily to the reduced renal pathology, warranting further exploration, as current therapeutics targeting lupus nephritis are limited and, thus, in great demand.
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Affiliation(s)
- Jing Zhu
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
| | - Alayna N Hay
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
| | - Ashley A Potter
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
| | - Madison W Richwine
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
| | | | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
| | - John Wilson
- The Jackson Laboratory, Bar Harbor, ME 04609; and
| | | | | | - Caroline M Leeth
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061;
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Cletzer E, Klahn S, Dervisis N, LeRoith T. Identification of the JAK-STAT pathway in canine splenic hemangiosarcoma, thyroid carcinoma, mast cell tumor, and anal sac adenocarcinoma. Vet Immunol Immunopathol 2019; 220:109996. [PMID: 31958674 DOI: 10.1016/j.vetimm.2019.109996] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 12/04/2019] [Accepted: 12/11/2019] [Indexed: 12/18/2022]
Abstract
Dysregulation of the Janus Kinase (JAK) - Signal Transducer and Activator of Transcription (STAT) cellular signaling pathway has been associated with the development and progression of multiple human cancers. STAT3 has been reported to be present and constitutively active in a number of veterinary cancers, and few studies have reported mutations or activation of JAK1 or JAK2. Archived tissue samples from 54 client-owned dogs with histologically-diagnosed HSA, MCT, TC, or AGASACA were evaluated by immunohistochemical scoring of JAK1, JAK2, STAT3, and the phosphorylated counterparts pJAK1, pJAK2, and pSTAT3. IHC scoring was retrospectively analyzed with retrospectively-collected clinical parameters, including patient characteristics, metastasis, and survival. JAK1, pJAK1, JAK2, pJAK2, STAT3, and pSTAT3 were present in all tumor types evaluated. Significant correlations between JAK 1/2 or STAT3 and activated or downstream components were identified in all tumor types. Clinically, pSTAT3 was correlated with development of metastasis in dogs with MCT, while increased JAK1 expression or activation may impact survival in dogs with MCT or HSA. These findings provide a foundation to further investigate the JAK-STAT pathway in canine malignancies for additional therapeutic options.
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Affiliation(s)
- Erin Cletzer
- Department of Small Animal Clinical Sciences, Virginia Maryland College of Veterinary Medicine, Virginia Tech, 205 Duck Pond Dr, Blacksburg, VA, 24061, USA
| | - Shawna Klahn
- Department of Small Animal Clinical Sciences, Virginia Maryland College of Veterinary Medicine, Virginia Tech, 205 Duck Pond Dr, Blacksburg, VA, 24061, USA.
| | - Nikolaos Dervisis
- Department of Small Animal Clinical Sciences, Virginia Maryland College of Veterinary Medicine, Virginia Tech, 205 Duck Pond Dr, Blacksburg, VA, 24061, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia Maryland College of Veterinary Medicine, Virginia Tech, 205 Duck Pond Dr, Blacksburg, VA, 24061, USA
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Weger-Lucarelli J, Carrau L, Levi LI, Rezelj V, Vallet T, Blanc H, Boussier J, Megrian D, Coutermarsh-Ott S, LeRoith T, Vignuzzi M. Host nutritional status affects alphavirus virulence, transmission, and evolution. PLoS Pathog 2019; 15:e1008089. [PMID: 31710653 PMCID: PMC6872174 DOI: 10.1371/journal.ppat.1008089] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 11/21/2019] [Accepted: 09/17/2019] [Indexed: 12/13/2022] Open
Abstract
Malnourishment, specifically overweight/obesity and undernourishment, affects more than 2.5 billion people worldwide, with the number affected ever-increasing. Concurrently, emerging viral diseases, particularly those that are mosquito-borne, have spread dramatically in the past several decades, culminating in outbreaks of several viruses worldwide. Both forms of malnourishment are known to lead to an aberrant immune response, which can worsen disease outcomes and reduce vaccination efficacy for viral pathogens such as influenza and measles. Given the increasing rates of malnutrition and spread of arthropod-borne viruses (arboviruses), there is an urgent need to understand the role of host nutrition on the infection, virulence, and transmission of these viruses. To address this gap in knowledge, we infected lean, obese, and undernourished mice with arthritogenic arboviruses from the genus Alphavirus and assessed morbidity, virus replication, transmission, and evolution. Obesity and undernourishment did not consistently influence virus replication in the blood of infected animals except for reductions in virus in obese mice late in infection. However, morbidity was increased in obese mice under all conditions. Using Mayaro virus (MAYV) as a model arthritogenic alphavirus, we determined that both obese and undernourished mice transmit virus less efficiently to mosquitoes than control (lean) mice. In addition, viral genetic diversity and replicative fitness were reduced in virus isolated from obese compared to lean controls. Taken together, nutrition appears to alter the course of alphavirus infection and should be considered as a critical environmental factor during outbreaks. Over- and undernutrition, collectively known as malnutrition, affect over 2.5 billion people worldwide. Associations between malnutrition and mosquito-borne virus infection and resulting disease have been identified in epidemiological studies but have not been explored in controlled studies. Here, we infect obese or undernourished mice with different arthritis inducing viruses in the genus Alphavirus and measure disease symptoms, viral replication, transmission, and evolution. We found that markers of disease, namely weight loss and footpad swelling, were increased in obese mice. We also found that replication differences between mice fed different diets were minimal except late in infection for obese mice when levels of virus dropped significantly. When mosquitoes were allowed to feed on mice fed different diets, we observed reduced infection and transmission rates, depending on the diet. Finally, we found reduced genetic diversity and replicative fitness of virus isolated from obese mice. This study provides insights into the influence of nutrition on alphavirus pathogenesis and evolution.
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Affiliation(s)
- James Weger-Lucarelli
- Institut Pasteur, Viral Populations and Pathogenesis Unit, Paris, France.,Department of Biomedical Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, United States of America
| | - Lucia Carrau
- Institut Pasteur, Viral Populations and Pathogenesis Unit, Paris, France
| | - Laura I Levi
- Institut Pasteur, Viral Populations and Pathogenesis Unit, Paris, France.,Ecole doctorale BioSPC, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Veronica Rezelj
- Institut Pasteur, Viral Populations and Pathogenesis Unit, Paris, France
| | - Thomas Vallet
- Institut Pasteur, Viral Populations and Pathogenesis Unit, Paris, France
| | - Hervé Blanc
- Institut Pasteur, Viral Populations and Pathogenesis Unit, Paris, France
| | - Jérémy Boussier
- Institut Pasteur, Immunobiology of Dendritic Cells, Institut National de la Santé et de la Recherche Médicale, Paris, France
| | - Daniela Megrian
- Institut Pasteur, Evolutionary Biology of the Microbial Cell, Department of Microbiology, Paris, France
| | - Sheryl Coutermarsh-Ott
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, United States of America
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, United States of America
| | - Marco Vignuzzi
- Institut Pasteur, Viral Populations and Pathogenesis Unit, Paris, France
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Oakes VJ, Yabsley MJ, Schwartz D, LeRoith T, Bissett C, Broaddus C, Schlater JL, Todd SM, Boes KM, Brookhart M, Lahmers KK. Theileria orientalis Ikeda Genotype in Cattle, Virginia, USA. Emerg Infect Dis 2019; 25:1653-1659. [PMID: 31237835 PMCID: PMC6711211 DOI: 10.3201/eid2509.190088] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Theileria orientalis Ikeda genotype is a parasite that causes a disease in cattle that results in major economic issues in Asia, New Zealand, and Australia. The parasite is transmitted by Haemaphysalis longicornis ticks, which have recently been reported in numerous states throughout the eastern United States. Concurrently, cattle in Virginia showed clinical signs consistent with a hemoprotozoan infection. We used amplicons specific for the major piroplasm surface protein and small subunit rDNA of piroplasms to test blood samples from the cattle by PCR. Bidirectional Sanger sequencing showed sequences with 100% identity with T. orientalis Ikeda genotype 2 sequences. We detected the parasite in 3 unrelated herds and from various animals sampled at 2 time points. Although other benign T. orientalis genotypes are endemic to the United States, detection of T. orientalis Ikeda genotype might represent a risk for the cattle industry in Virginia.
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Rogers E, Todd SM, Pierson FW, Kenney SP, Heffron CL, Yugo DM, Matzinger SR, Mircoff E, Ngo I, Kirby C, Jones M, Siegel P, Jobst P, Hall K, Etches RJ, Meng XJ, LeRoith T. CD8 + lymphocytes but not B lymphocytes are required for protection against chronic hepatitis E virus infection in chickens. J Med Virol 2019; 91:1960-1969. [PMID: 31317546 DOI: 10.1002/jmv.25548] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 07/09/2019] [Indexed: 12/12/2022]
Abstract
Hepatitis E is an important global disease, causing outbreaks of acute hepatitis in many developing countries and sporadic cases in industrialized countries. Hepatitis E virus (HEV) infection typically causes self-limiting acute hepatitis but can also progress to chronic disease in immunocompromised individuals. The immune response necessary for the prevention of chronic infection is T cell-dependent; however, the arm of cellular immunity responsible for this protection is not currently known. To investigate the contribution of humoral immunity in control of HEV infection and prevention of chronicity, we experimentally infected 20 wild-type (WT) and 18 immunoglobulin knockout (JH-KO) chickens with a chicken strain of HEV (avian HEV). Four weeks postinfection (wpi) with avian HEV, JH-KO chickens were unable to elicit anti-HEV antibody but had statistically significantly lower liver lesion scores than the WT chickens. At 16 wpi, viral RNA in fecal material and liver, and severe liver lesions were undetectable in both groups. To determine the role of cytotoxic lymphocytes in the prevention of chronicity, we infected 20 WT and 20 cyclosporine and CD8+ antibody-treated chickens with the same strain of avian HEV. The CD8 + lymphocyte-depleted, HEV-infected chickens had higher incidences of prolonged fecal viral shedding and statistically significantly higher liver lesion scores than the untreated, HEV-infected birds at 16 wpi. The results indicate that CD8 + lymphocytes are required for viral clearance and reduction of liver lesions in HEV infection while antibodies are not necessary for viral clearance but may contribute to the development of liver lesions in acute HEV infection.
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Affiliation(s)
- Eda Rogers
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Stephanie Michelle Todd
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Frank William Pierson
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Scott P Kenney
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Connie Lynn Heffron
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Danielle M Yugo
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Shannon R Matzinger
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Elena Mircoff
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Irene Ngo
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Charles Kirby
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Michaela Jones
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Paul Siegel
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Peter Jobst
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Karen Hall
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | | | - Xiang-Jin Meng
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
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Hay AN, Witonsky SG, Lindsay DS, LeRoith T, Zhu J, Kasmark L, Leeth CM. Sarcocystis neurona-Induced Myeloencephalitis Relapse Following Anticoccidial Treatment. J Parasitol 2019. [PMID: 31033388 DOI: 10.1645/18-193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Sarcocystis neurona is a ubiquitous parasite in the eastern United States, which is the principal causative agent in the neurologic disorder equine protozoal myeloencephalitis (EPM). While much is known about this protozoa's life cycle in its natural host, the opossum (Didelphis virginiana), little is known of how it acts in the aberrant equine host, which displays a high incidence of exposure with a relatively low rate of morbidity. For this study, we employed the popular interferon gamma knockout mouse model to determine the potential for recrudescence of S. neurona infection after treatment with the anticoccidial drug diclazuril. Mice were infected with S. neurona merozoites, and 7-days post-infection (DPI) they were treated with diclazuril for 30 or 60 days or not treated at all. All infected non-treated mice developed neurologic signs consistent with S. neurona infection within 30 DPI. All diclazuril-treated infected mice remained clinically normal while on treatment but developed neurologic signs within 60 days of treatment cessation. Histological examination of cerebella from all infected mice demonstrated characteristic lesions of S. neurona infection, regardless of treatment status. Cerebellar samples collected from infected treated mice, displaying neurologic signs, produced viable S. neurona in culture. However, cerebellar samples collected from infected and neurologically normal mice at the end of a 30-day treatment period did not produce viable S. neurona in culture. Analysis of the humoral immune response in infected mice showed that during treatment IgM antibody production decreased, suggesting the organism was sequestered from immune surveillance. The cessation of treatment and subsequent development of neurologic disease resulted in increased IgM antibody production, suggesting recognition by the immune system at that time. Based on the study results the authors propose that diclazuril was able to inhibit the replication and migration of S. neurona but not fully eliminate the parasite, suggesting recrudescence of infection after treatment is possible.
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Affiliation(s)
- Alayna N Hay
- 1 Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, Virginia 24061
| | - Sharon G Witonsky
- 2 Department of Large Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia 24061
| | - David S Lindsay
- 3 Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia 24061
| | - Tanya LeRoith
- 3 Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia 24061
| | - Jing Zhu
- 1 Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, Virginia 24061
| | - Leah Kasmark
- 1 Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, Virginia 24061
| | - Caroline M Leeth
- 1 Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, Virginia 24061
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Kani Y, Cecere TE, Lahmers K, LeRoith T, Zimmerman KL, Isom S, Hsu FC, Debinksi W, Robertson JL, Rossmeisl JH. Diagnostic accuracy of stereotactic brain biopsy for intracranial neoplasia in dogs: Comparison of biopsy, surgical resection, and necropsy specimens. J Vet Intern Med 2019; 33:1384-1391. [PMID: 30990928 PMCID: PMC6524398 DOI: 10.1111/jvim.15500] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 04/03/2019] [Indexed: 01/07/2023] Open
Abstract
Background Stereotactic brain biopsy (SBB) is a technique that allows for definitive diagnosis of brain lesions. Little information is available regarding the diagnostic utility of SBB in dogs with intracranial diseases. Objective To investigate the diagnostic accuracy (DA) of SBB in dogs with brain tumors. Animals Thirty‐one client‐owned dogs that underwent SBB followed by surgical resection or necropsy examinations. Methods Retrospective observational study. Two pathologists blinded to SBB and reference standard diagnoses reviewed histologic specimens and typed and graded tumors according to World Health Organization and revised canine glioma classification criteria. Agreement between tumor type and grade from SBB were compared to reference standards and assessed using kappa statistics. Patient and technical factors associated with agreement also were examined. Results Stereotactic brain biopsy specimens were obtained from 24 dogs with gliomas and 7 with meningiomas. Tumor type agreement between SBB and the reference standard was observed in 30/31 cases (κ = 0.95). Diagnostic concordance was perfect for meningiomas. Grade agreement among gliomas was observed in 18/23 cases (κ = 0.47). Stereotactic brain biopsy underrepresented the reference standard glioma grade in cases with disagreement. The DA of SBB was 81%, with agreement noted in 56/69 biopsy samples. Smaller tumors and fewer SBB specimens obtained were significantly associated with diagnostic discordance. Conclusions and Clinical Importance The DA of SBB readily allows for the diagnosis of common brain tumors in dogs. Although glioma grade discordance was frequent, diagnoses obtained from SBB are sufficient to currently inform therapeutic decisions. Multiple SBB specimens should be collected to maximize DA.
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Affiliation(s)
- Yukitaka Kani
- Veterinary and Comparative Neuro-oncology Laboratory, Department of Small Animal Clinical Sciences, Virginia Tech, Blacksburg, Virginia
| | - Thomas E Cecere
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia
| | - Kevin Lahmers
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia
| | - Kurt L Zimmerman
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, Virginia
| | - Scott Isom
- Department of Biostatistical Sciences, Wake Forest University, Winston-Salem, North Carolina
| | - Fang-Chi Hsu
- Department of Biostatistical Sciences, Wake Forest University, Winston-Salem, North Carolina
| | - Waldemar Debinksi
- Cancer Biology, Comprehensive Cancer Center and Brain Tumor Center of Excellence, School of Medicine, Wake Forest University, Winston-Salem, North Carolina
| | - John L Robertson
- Veterinary and Comparative Neuro-oncology Laboratory, Department of Small Animal Clinical Sciences, Virginia Tech, Blacksburg, Virginia.,Cancer Biology, Comprehensive Cancer Center and Brain Tumor Center of Excellence, School of Medicine, Wake Forest University, Winston-Salem, North Carolina
| | - John H Rossmeisl
- Veterinary and Comparative Neuro-oncology Laboratory, Department of Small Animal Clinical Sciences, Virginia Tech, Blacksburg, Virginia.,Cancer Biology, Comprehensive Cancer Center and Brain Tumor Center of Excellence, School of Medicine, Wake Forest University, Winston-Salem, North Carolina
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Tavella VJ, Walters JN, Crofton LM, LeRoith T. Mixed germ cell tumor composed of a tridermic testicular teratoma and seminoma in a rooster. J Vet Diagn Invest 2019; 31:395-398. [PMID: 30862303 DOI: 10.1177/1040638719838001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A 5-y-old backyard Araucana-Americana rooster was presented to the regional diagnostic laboratory with a history of progressive lethargy and respiratory signs. Autopsy revealed a single large mass of testicular origin in the coelomic cavity, causing compression of other organs. Histologically, the mass was 1 neoplasm with mixed components of 2 different germ cell tumors, namely a teratoma composed of elements of all 3 primordial germ cell lines (ectoderm, mesoderm, and endoderm), and a seminoma consisting of round or polygonal cells arranged in sheets supported by a scant fibrovascular stroma. Teratomas and seminomas are both considered to be uncommon neoplasms in poultry medicine. A testicular teratoma is composed of mature embryonic tissue derived from at least 2 of the 3 germinal layers. Seminomas and teratomas both arise from the germinal epithelium of seminiferous tubules and are classified as germ cell tumors. This neoplastic mass thus is a rare case of a mixed germ cell tumor.
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Affiliation(s)
- Vincent J Tavella
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Tavella, LeRoith).,Harrisonburg Regional Animal Health Laboratory, Division of Animal and Food Industry Services, Virginia Department of Agriculture and Consumer Services, Harrisonburg, VA (Walters, Crofton)
| | - Jessica N Walters
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Tavella, LeRoith).,Harrisonburg Regional Animal Health Laboratory, Division of Animal and Food Industry Services, Virginia Department of Agriculture and Consumer Services, Harrisonburg, VA (Walters, Crofton)
| | - Lisa M Crofton
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Tavella, LeRoith).,Harrisonburg Regional Animal Health Laboratory, Division of Animal and Food Industry Services, Virginia Department of Agriculture and Consumer Services, Harrisonburg, VA (Walters, Crofton)
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Tavella, LeRoith).,Harrisonburg Regional Animal Health Laboratory, Division of Animal and Food Industry Services, Virginia Department of Agriculture and Consumer Services, Harrisonburg, VA (Walters, Crofton)
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Abstract
Dilated cardiomyopathy (DCM) is a myocardial disease characterized by ventricular chamber dilation associated with systolic myocardial dysfunction in the absence of other cardiac lesions. DCM occasionally develops in conjunction with proliferation of fibroelastic fibers in the endocardium, producing endocardial fibroelastosis (EFE). Although early reports describe EFE as a primary disease, evidence now suggests that EFE may develop as a response to myocardial dysfunction. Echocardiographic evaluation of a 4-wk-old Pallas cat ( Otocolobus manul) with respiratory distress revealed enlargement of both atria, enlarged end-systolic left ventricular dimension, and left ventricular dilation. DCM was diagnosed, and the cat was euthanized, given the poor prognosis. Postmortem examination revealed pericardial effusion and biventricular and biatrial enlargement. The interventricular septum and free walls of ventricles were thin. Histologically, the endocardium of the left and right ventricles was diffusely thickened; Verhoeff-Van Gieson staining of the left ventricular endocardium revealed a moderate amount of endocardial accumulation of elastin and collagen. These fibers were more prominent in papillary muscles and around coronary blood vessels. Based on these findings, we diagnosed DCM with EFE. Cardiac diseases are rarely diagnosed in wild felids.
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Affiliation(s)
- Erwin K Gudenschwager
- Departments of Biomedical Sciences and Pathobiology (Gudenschwager, LeRoith), Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA.,Small Animal Clinical Sciences (Abbott), Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA
| | - Jonathan A Abbott
- Departments of Biomedical Sciences and Pathobiology (Gudenschwager, LeRoith), Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA.,Small Animal Clinical Sciences (Abbott), Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA
| | - Tanya LeRoith
- Departments of Biomedical Sciences and Pathobiology (Gudenschwager, LeRoith), Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA.,Small Animal Clinical Sciences (Abbott), Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA
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Miklavcic JJ, Badger TM, Bowlin AK, Matazel KS, Cleves MA, LeRoith T, Saraf MK, Chintapalli SV, Piccolo BD, Shankar K, Yeruva L. Human Breast-Milk Feeding Enhances the Humoral and Cell-Mediated Immune Response in Neonatal Piglets. J Nutr 2018; 148:1860-1870. [PMID: 30247686 PMCID: PMC6209812 DOI: 10.1093/jn/nxy170] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 06/22/2018] [Accepted: 07/03/2018] [Indexed: 12/24/2022] Open
Abstract
Background The benefits of breastfeeding infants are well characterized, including those on the immune system. However, determining the mechanism by which human breast milk (HBM) elicits effects on immune response requires investigation in an appropriate animal model. Objective The primary aim of this study was to develop a novel porcine model and to determine the differential effects of feeding HBM and a commercial milk formula (MF) on immune response and gastrointestinal microbial colonization in a controlled environment. Methods Male piglets were fed HBM (n = 26) or MF (n = 26) from day 2 through day 21. Piglets were vaccinated (n = 9/diet group) with cholera toxin and cholera toxin subunit B (CTB) and tetanus toxoid at 21 d or were fed placebo (n = 6/diet group) and then weaned to a standard solid diet at the age of 21 d. Humoral and cell-mediated immune responses were assessed from blood on days 35 and 48. Immune response was further examined from tissues, including mesenteric lymph nodes (MLNs), Peyer's patches (PPs), and spleen. The colonization of gut microbiota was characterized from feces on days 16 and 49. Results Serum antibody titers in piglets fed HBM were 4-fold higher (P < 0.05) to CTB and 3-fold higher (P < 0.05) to tetanus toxoid compared with piglets fed MF on day 48. Compared with MF, the numbers of immunoglobulin A antibody-producing cells to CTB were 13-fold higher (P < 0.05) in MLNs and 11-fold higher (P < 0.05) in PPs in the HBM diet group on day 51. In addition, significantly increased T cell proliferation was observed in the HBM group relative to the MF group. Furthermore, microbial diversity in the HBM group was lower (P < 0.05) than in the MF group. Conclusions This porcine model appears to be valid for studying the effects of early postnatal diet on immune responses and the gastrointestinal microbiome. Our results lay the groundwork for future studies defining the role of infant diet on microbiota and immune function.
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Affiliation(s)
- John J Miklavcic
- Arkansas Children's Nutrition Center, Little Rock, AR
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR
| | - Thomas M Badger
- Arkansas Children's Nutrition Center, Little Rock, AR
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR
| | - Anne K Bowlin
- Arkansas Children's Nutrition Center, Little Rock, AR
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR
| | - Katelin S Matazel
- Arkansas Children's Nutrition Center, Little Rock, AR
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR
| | - Mario A Cleves
- Arkansas Children's Nutrition Center, Little Rock, AR
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR
- Arkansas Children's Research Institute, Little Rock, AR
| | - Tanya LeRoith
- Department of Biomedical Science and Pathobiology, Virginia Polytechnic Institute and State University, Blacksburg, VA
| | - Manish K Saraf
- Arkansas Children's Nutrition Center, Little Rock, AR
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR
| | - Sree V Chintapalli
- Arkansas Children's Nutrition Center, Little Rock, AR
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR
| | - Brian D Piccolo
- Arkansas Children's Nutrition Center, Little Rock, AR
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR
| | - Kartik Shankar
- Arkansas Children's Nutrition Center, Little Rock, AR
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR
| | - Laxmi Yeruva
- Arkansas Children's Nutrition Center, Little Rock, AR
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR
- Arkansas Children's Research Institute, Little Rock, AR
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Zimmerman KL, Panciera DL, Hoeschele I, Monroe WE, Todd SM, Werre SR, LeRoith T, Fecteau K, Lake BB. Adrenocortical Challenge Response and Genomic Analyses in Scottish Terriers With Increased Alkaline Phosphate Activity. Front Vet Sci 2018; 5:231. [PMID: 30356827 PMCID: PMC6189480 DOI: 10.3389/fvets.2018.00231] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 09/06/2018] [Indexed: 11/13/2022] Open
Abstract
Scottish terriers (ST) frequently have increased serum alkaline phosphatase (ALP) of the steroid isoform. Many of these also have high serum concentrations of adrenal sex steroids. The study's objective was to determine the cause of increased sex steroids in ST with increased ALP. Adrenal gland suppression and stimulation were compared by low dose dexamethasone (LDDS), human chorionic gonadotropin (HCG) and adrenocorticotropic hormone (ACTH) response tests. Resting plasma pituitary hormones were measured. Steroidogenesis-related mRNA expression was evaluated in six ST with increased ALP, eight dogs of other breeds with pituitary-dependent hyperadrenocorticism (HAC), and seven normal dogs. The genome-wide association of single nucleotide polymorphisms (SNP) with ALP activity was evaluated in 168 ST. ALP (reference interval 8–70 U/L) was high in all ST (1,054 U/L) and HAC (985 U/L) dogs. All HAC dogs and 2/8 ST had increased cortisol post-ACTH administration. All ST and 2/7 Normal dogs had increased sex steroids post-ACTH. ST and Normal dogs had similar post-challenge adrenal steroid profiles following LDDS and HCG. Surprisingly, mRNA of hydroxysteroid 17-beta dehydrogenase 2 (HSD17B2) was lower in ST and Normal dogs than HAC. HSD17B2 facilities metabolism of sex steroids. A SNP region was identified on chromosome 5 in proximity to HSD17B2 that correlated with increased serum ALP. ST in this study with increased ALP had a normal pituitary-adrenal axis in relationship to glucocorticoids and luteinizing hormone. We speculate the identified SNP and HSD17B2 gene may have a role in the pathogenesis of elevated sex steroids and ALP in ST.
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Affiliation(s)
- Kurt L Zimmerman
- Department of Biomedical Sciences and Pathobiology, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - David L Panciera
- Department of Small Animal Clinical Sciences, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - Ina Hoeschele
- Department of Statistics, College of Science, and Biocomplexity Institute, Virginia Tech, Blacksburg, VA, United States
| | - W Edward Monroe
- Department of Small Animal Clinical Sciences, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - Stephanie Michelle Todd
- Veterinary Medicine Experiment Station, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - Stephen R Werre
- Study Design and Statistical Analysis Laboratory, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - Kellie Fecteau
- Department of Biomedical and Diagnostic Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN, United States
| | - Bathilda B Lake
- Department of Biomedical Sciences and Pathobiology, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
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Cao D, Sooryanarain H, Yugo DM, Tian D, Rogers AJ, Heffron CL, Thimmasandra Narayanappa A, LeRoith T, Overend C, Matzinger SR, Elankumaran S, Hermann JR, Patterson AR, Meng XJ. Evaluation of the pathogenicity of mammalian orthoreovirus type 3 (MRV3) in germ-free gnotobiotic pigs and of the efficacy of an inactivated vaccine against MRV3 infection in neonatal conventional piglets. Vet Microbiol 2018; 224:23-30. [PMID: 30269786 DOI: 10.1016/j.vetmic.2018.08.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 08/10/2018] [Accepted: 08/20/2018] [Indexed: 12/23/2022]
Abstract
A novel U.S. strain of mammalian orthoreovirus type 3 (MRV3) isolated from diarrheic pigs in 2015 was reportedly highly pathogenic in pigs. In this study, we first developed an inactivated MRV3 vaccine and determined its protective efficacy against MRV3 infection in conventional neonatal piglets. A pathogenicity study was also conducted in gnotobiotic pigs to further assess the pathogenicity of MRV3. To evaluate if piglets could be protected against MRV3 infection after immunization of pregnant sows with an inactivated MRV3 vaccine, pregnant sows were vaccinated with 2 or 3 doses of the vaccine or with PBS buffer. Four-day-old piglets born to vaccinated and unvaccinated sows were subsequently challenged with MRV3. The results showed that piglets born from vaccinated sows had lower levels of fecal viral RNA shedding at 1, 3, and 4 days post-challenge, suggesting that the inactivated MRV3 vaccine can reduce MRV3 replication. Surprisingly, although the conventional piglets were infected, they did not develop severe enteric disease as reported previously. Therefore, in an effort to further definitively assess the pathogenicity of MRV3, we experimentally infected gnotobiotic pigs, a more sensitive model for pathogenicity study, with the wild-type MRV3 virus. The infected gnotobiotic piglets all survived and exhibited only very mild diarrhea in some pigs. Taken together, the results indicate that the novel strain of MRV3 recently isolated in the United States infected but caused only very mild diarrhea in pigs, and that maternal immunity acquired from sows vaccinated with an inactivated vaccine can reduce MRV3 replication in neonatal pigs.
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Affiliation(s)
- Dianjun Cao
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Harini Sooryanarain
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Danielle M Yugo
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Debin Tian
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Adam J Rogers
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - C Lynn Heffron
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Athmaram Thimmasandra Narayanappa
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Christopher Overend
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Shannon R Matzinger
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Subbiah Elankumaran
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | | | | | - Xiang-Jin Meng
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States.
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44
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Dunford KM, LeRoith T, Kemper AR. Effects of postmortem time and storage fluid on the material properties of bovine liver parenchyma in tension. J Mech Behav Biomed Mater 2018; 87:240-255. [PMID: 30096512 DOI: 10.1016/j.jmbbm.2018.05.043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 05/28/2018] [Accepted: 05/29/2018] [Indexed: 11/28/2022]
Abstract
In motor vehicle collisions (MVCs), liver injuries are one of the most frequently reported types of abdominal organ trauma. Although finite element models are utilized to evaluate the risk of sustaining an abdominal organ injury in MVCs, these models must be validated based on biomechanical data in order to accurately assess injury risk. Given that previous studies that have quantified the tensile failure properties of human liver parenchyma have been limited to testing at 48 h postmortem, it is currently unknown how the material properties change between time of death and 48 h postmortem. Therefore, the objective of this study was to quantify the effects of postmortem degradation on the tensile material properties of bovine liver parenchyma with increasing postmortem time when stored in DMEM or saline. A total of 148 uniaxial tension tests were successfully conducted on parenchyma samples of fourteen bovine livers acquired immediately after death. Liver tissue was submerged in DMEM or saline and kept cool during sample preparation and storage. Twelve livers were stored as large blocks of tissue, while two livers were stored as small blocks and slices. Tension tests were performed on multiple dog-bone samples from each liver at three time points: ~6 h, ~24 h, and ~48 h postmortem. The data were then analyzed using a Linear Mixed Effect Model to determine if there were significant changes in the failure stress, failure strain, and modulus with respect to postmortem time. The results of the current study showed that the failure strain of bovine liver parenchyma decreased significantly between 6 h and 48 h after death when stored as large blocks in saline and refrigerated. Conversely, neither the failure stress nor failure strain changed significantly with respect to postmortem time when stored as large blocks in DMEM. The modulus did not change significantly with respect to postmortem time for tissue stored as large blocks in either saline or DMEM. Cellular disruption increased with postmortem time for tissue stored as large blocks, with tissue stored in saline showing the greatest increase at each time point. In addition, preliminary results indicated that reducing the tissue storage size had a negative effect on the material properties and cellular architecture. Overall, this study illustrated that the effects of postmortem liver degradation varied with respect to the preservation fluid, storage time, and storage block size.
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Affiliation(s)
- Kristin M Dunford
- Virginia Tech, Center for Injury Biomechanics, Department of Biomedical Engineering and Mechanics, 440 Kelly Hall, 325 Stanger St., Blacksburg, VA 24061, USA.
| | - Tanya LeRoith
- Virginia-Maryland College of Veterinary Medicine, Anatomic Pathology, Department of Biomedical Sciences & Pathobiology, 132 IDRF, 295 Duckpond Dr., Blacksburg, VA 24061, USA.
| | - Andrew R Kemper
- Virginia Tech, Center for Injury Biomechanics, Department of Biomedical Engineering and Mechanics, 449 Kelly Hall, 325 Stanger St., Blacksburg, VA 24061, USA.
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45
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Si H, Wang X, Zhang L, Parnell LD, Admed B, LeRoith T, Ansah TA, Zhang L, Li J, Ordovás JM, Si H, Liu D, Lai CQ. Dietary epicatechin improves survival and delays skeletal muscle degeneration in aged mice. FASEB J 2018; 33:965-977. [PMID: 30096038 PMCID: PMC6355074 DOI: 10.1096/fj.201800554rr] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We recently reported that epicatechin, a bioactive compound that occurs naturally in various common foods, promoted general health and survival of obese diabetic mice. It remains to be determined whether epicatechin extends health span and delays the process of aging. In the present study, epicatechin or its analogue epigallocatechin gallate (EGCG) (0.25% w/v in drinking water) was administered to 20-mo-old male C57BL mice fed a standard chow. The goal was to determine the antiaging effect. The results showed that supplementation with epicatechin for 37 wk strikingly increased the survival rate from 39 to 69%, whereas EGCG had no significant effect. Consistently, epicatechin improved physical activity, delayed degeneration of skeletal muscle (quadriceps), and shifted the profiles of the serum metabolites and skeletal muscle general mRNA expressions in aging mice toward the profiles observed in young mice. In particular, we found that dietary epicatechin significantly reversed age-altered mRNA and protein expressions of extracellular matrix and peroxisome proliferator–activated receptor pathways in skeletal muscle, and reversed the age-induced declines of the nicotinate and nicotinamide pathway both in serum and skeletal muscle. The present study provides evidence that epicatechin supplementation can exert an antiaging effect, including an increase in survival, an attenuation of the aging-related deterioration of skeletal muscles, and a protection against the aging-related decline in nicotinate and nicotinamide metabolism.—Si, H., Wang, X., Zhang, L., Parnell, L. D., Ahmed, B., LeRoith, T., Ansah, T.-A., Zhang, L., Li, J., Ordovás, J. M., Si, H., Liu, D., Lai, C.-Q. Dietary epicatechin improves survival and delays skeletal muscle degeneration in aged mice.
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Affiliation(s)
- Hongwei Si
- Department of Human Sciences, Tennessee State University, Nashville, Tennessee, USA
| | - Xiaoyong Wang
- Department of Human Sciences, Tennessee State University, Nashville, Tennessee, USA
| | - Longyun Zhang
- Department of Human Sciences, Tennessee State University, Nashville, Tennessee, USA
| | - Laurence D Parnell
- United States Department of Agriculture (USDA) Agricultural Research Service, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, USA
| | - Bulbul Admed
- Department of Human Sciences, Tennessee State University, Nashville, Tennessee, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland Regional College of Veterinary Medicine, Blacksburg, Virginia, USA
| | - Twum-Ampofo Ansah
- Department of Neuroscience and Pharmacology, Meharry Medical College, Nashville, Tennessee, USA
| | - Lijuan Zhang
- Department of Human Sciences, Tennessee State University, Nashville, Tennessee, USA
| | - Jianwei Li
- Department of Agriculture and Environmental Sciences, Tennessee State University, Nashville, Tennessee, USA
| | - José M Ordovás
- Nutrition and Genomics Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, USA.,Research Institute on Food and Health Sciences, Madrid Institute of Advanced Studies (IMDEA), Campus of Universal Excellence (CEI), Autonomous University of Madrid (UAM), Madrid, Spain.,Superior Council of Scientific Investigations (CSIC), Madrid, Spain
| | - Hongzong Si
- Institute of Computational Science and Engineering, Qingdao University, Qingdao, China; and
| | - Dongmin Liu
- Department of Human Nutrition, Foods and Exercise, Virginia Tech, Blacksburg, Virginia, USA
| | - Chao-Qiang Lai
- United States Department of Agriculture (USDA) Agricultural Research Service, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, USA
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46
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Petruzzi B, Dalloul RA, LeRoith T, Evans NP, Pierson FW, Inzana TJ. Biofilm formation and avian immune response following experimental acute and chronic avian cholera due to Pasteurella multocida. Vet Microbiol 2018; 222:114-123. [PMID: 30080666 DOI: 10.1016/j.vetmic.2018.07.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 06/21/2018] [Accepted: 07/06/2018] [Indexed: 12/15/2022]
Abstract
Pasteurella multocida is the causative agent of avian cholera, an important economic and ecological disease that can present as a peracute, acute, chronic, or asymptomatic infection. Acute avian cholera is associated with encapsulated P. multocida, while chronic and asymptomatic cases of avian cholera may be associated with capsule-deficient P. multocida isolates. We hypothesize that biofilm formation is also associated with chronic and asymptomatic avian cholera. Experimental infections of chickens with encapsulated, biofilm-deficient P. multocida strain X73, proficient biofilm forming P. multocida strain X73ΔhyaD, and proficient biofilm forming clinical strains 775 and 756 showed that virulence was inversely correlated with biofilm formation. Biofilm-proficient isolates induced chronic avian cholera in the chicken host. Histopathological analysis was used to show that biofilm-proficient isolates induced little inflammation in the lungs, heart, and liver, while biofilm-deficient isolates induced greater inflammation and induced the recruitment of heterophil granulocytes. Putative biofilm matrix material and exopolysaccharide was detected in pulmonary tissue of chickens diagnosed with chronic avian cholera using scanning electron microscopy and a fluorescently-tagged lectin, respectively, supporting a role for biofilm in chronic avian cholera. P. multocida induced Th1 and Th17 immune responses during acute and chronic avian cholera, as determined by quantitative real-time PCR of splenic cytokine genes. Chickens that succumbed to acute avian cholera after experimental challenge with strain X73 had high levels of INF-γ, IL-1β, IL-6, IL-12A, IL-22, IL-17A, and IL-17RA expressed in the spleen compared to all other experimental groups. Birds infected with capsule-deficient strains had chronic infections lasting 7 days or longer, and had increased levels of IL-17RA, CCR6, and IL-16 compared to non-infected control chickens. However, specific antibody titers increased only transiently to capsule-deficient strains and were low, indicating that antibodies are less important in managing and clearing P. multocida infections.
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Affiliation(s)
- Briana Petruzzi
- Virginia-Maryland College of Veterinary Medicine, Department of Biomedical Sciences & Pathobiology, Virginia Tech, Blacksburg, VA, 24061, United States
| | - Rami A Dalloul
- College of Agriculture and Life Sciences, Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA, 24061, United States
| | - Tanya LeRoith
- Virginia-Maryland College of Veterinary Medicine, Department of Biomedical Sciences & Pathobiology, Virginia Tech, Blacksburg, VA, 24061, United States
| | - Nicholas P Evans
- Virginia-Maryland College of Veterinary Medicine, Department of Population Health Sciences, Virginia Tech, Blacksburg, VA, 24061, United States
| | - F William Pierson
- Virginia-Maryland College of Veterinary Medicine, Department of Population Health Sciences, Virginia Tech, Blacksburg, VA, 24061, United States
| | - Thomas J Inzana
- Virginia-Maryland College of Veterinary Medicine, Department of Biomedical Sciences & Pathobiology, Virginia Tech, Blacksburg, VA, 24061, United States; Virginia Tech Carilion School of Medicine, Virginia Tech, Blacksburg, VA, 24061, United States.
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47
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Coutermarsh-Ott S, Simmons A, Capria V, LeRoith T, Wilson JE, Heid B, Philipson CW, Qin Q, Hontecillas-Magarzo R, Bassaganya-Riera J, Ting JPY, Dervisis N, Allen IC. NLRX1 suppresses tumorigenesis and attenuates histiocytic sarcoma through the negative regulation of NF-κB signaling. Oncotarget 2018; 7:33096-110. [PMID: 27105514 PMCID: PMC5078078 DOI: 10.18632/oncotarget.8861] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 03/28/2016] [Indexed: 11/25/2022] Open
Abstract
Histiocytic sarcoma is an uncommon malignancy in both humans and veterinary species. Research exploring the pathogenesis of this disease is scarce; thus, diagnostic and therapeutic options for patients are limited. Recent publications have suggested a role for the NLR, NLRX1, in acting as a tumor suppressor. Based on these prior findings, we hypothesized that NLRX1 would function to inhibit tumorigenesis and thus the development of histiocytic sarcoma. To test this, we utilized Nlrx1-/- mice and a model of urethane-induced tumorigenesis. Nlrx1-/- mice exposed to urethane developed splenic histiocytic sarcoma that was associated with significant up-regulation of the NF-κB signaling pathway. Additionally, development of these tumors was also significantly associated with the increased regulation of genes associated with AKT signaling, cell death and autophagy. Together, these data show that NLRX1 suppresses tumorigenesis and reveals new genetic pathways involved in the pathobiology of histiocytic sarcoma.
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Affiliation(s)
- Sheryl Coutermarsh-Ott
- Department of Biological Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, USA
| | - Alysha Simmons
- Department of Biological Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, USA
| | - Vittoria Capria
- Department of Biological Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, USA
| | - Tanya LeRoith
- Department of Biological Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, USA
| | - Justin E Wilson
- Department of Genetics, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Bettina Heid
- Department of Biological Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, USA
| | - Casandra W Philipson
- Virginia Tech, Virginia Bioinformatics Institute, Nutritional Immunology and Molecular Medicine Laboratory, Blacksburg, VA, USA
| | - Qizhi Qin
- Department of Biological Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, USA
| | - Raquel Hontecillas-Magarzo
- Virginia Tech, Virginia Bioinformatics Institute, Nutritional Immunology and Molecular Medicine Laboratory, Blacksburg, VA, USA
| | - Josep Bassaganya-Riera
- Virginia Tech, Virginia Bioinformatics Institute, Nutritional Immunology and Molecular Medicine Laboratory, Blacksburg, VA, USA
| | - Jenny P-Y Ting
- Department of Genetics, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Nikolaos Dervisis
- Department of Small Animal Clinical Sciences, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, USA
| | - Irving C Allen
- Department of Biological Sciences and Pathobiology, Virginia Tech, VA-MD Regional College of Veterinary Medicine, Blacksburg, VA, USA
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48
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Subramaniam S, Yugo DM, Heffron CL, Rogers AJ, Sooryanarain H, LeRoith T, Overend C, Cao D, Meng XJ. Vaccination of sows with a dendritic cell-targeted porcine epidemic diarrhea virus S1 protein-based candidate vaccine reduced viral shedding but exacerbated gross pathological lesions in suckling neonatal piglets. J Gen Virol 2018; 99:230-239. [PMID: 29300158 DOI: 10.1099/jgv.0.001001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Porcine epidemic diarrhea virus (PEDV) poses a serious threat to swine worldwide as evidenced by its recent introduction into the USA and the devastating economic impact it caused to the USA swine industry. Commercial vaccines against PEDV are available but their efficacies are inadequate. Therefore, vaccines with improved efficacy are needed to effectively control PEDV infections. We previously determined the immunogenicity of a novel dendritic cell (DC)-targeted PEDV S1 protein-based subunit vaccine in weaned piglets in which the PEDV antigen was targeted to DCs through a porcine Langerin-specific antibody. In this study, we evaluated the protective efficacy of this DC-targeting vaccine by immunizing sows at 5 and 2 weeks prior to farrowing and by challenging the 5-day-old piglets with PEDV. The results showed that immunization of sow with DC-targeted PEDV vaccine did not eliminate faecal virus shedding in piglets but significantly reduced faecal viral RNA levels in the early days after virus challenge. The vaccine also reduced the amount of PEDV antigen in intestinal tissues presented with intestinal villi regrowth. However, the DC-targeted vaccine neither mitigated PEDV clinical signs nor affected viral RNA loads in intestinal tissues of piglets. In the vaccinated sow, DC-targeted PEDV vaccine enhanced T helper 1-like cluster of differentiation (CD)4 T cell responses and induced IgG but not IgA-specific immune responses. The suckling piglets in the DC-targeted vaccine group showed increased gross pathological lesions in the small intestine. Results in this study provide insights into the effects of sow cellular immune responses to PEDV infection in suckling piglets.
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Affiliation(s)
- Sakthivel Subramaniam
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA
| | - Danielle M Yugo
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA
| | - C Lynn Heffron
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA
| | - Adam J Rogers
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA
| | - Harini Sooryanarain
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA
| | - Christopher Overend
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA.,Present address: Environmental Health and Safety Division, University of Florida, Gainesville, FL, USA
| | - Dianjun Cao
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA
| | - Xiang-Jin Meng
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA
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49
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Saraf MK, Piccolo BD, Bowlin AK, Mercer KE, LeRoith T, Chintapalli SV, Shankar K, Badger TM, Yeruva L. Formula diet driven microbiota shifts tryptophan metabolism from serotonin to tryptamine in neonatal porcine colon. Microbiome 2017; 5:77. [PMID: 28705171 PMCID: PMC5513086 DOI: 10.1186/s40168-017-0297-z] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 07/04/2017] [Indexed: 05/06/2023]
Abstract
BACKGROUND The gut microbiota of breast-fed and formula-fed infants differ significantly, as do the risks for allergies, gut dysfunction, and upper respiratory tract infections. The connections between breast milk, various formulas, and the profiles of gut bacteria to these childhood illnesses, as well as the mechanisms underlying the effects, are not well understood. METHODS We investigated distal colon microbiota by 16S RNA amplicon sequencing, morphology by histomorphometry, immune response by cytokine expression, and tryptophan metabolism in a pig model in which piglets were sow-fed, or fed soy or dairy milk-based formula from postnatal day (PND) 2 to 21. RESULTS Formula feeding significantly (p < 0.05) altered the colon microbiota relative to the sow feeding. A significant reduction in microbial diversity was noted with formula groups in comparison to sow-fed. Streptococcus, Blautia, Citrobacter, Butrycimonas, Parabacteroides, Lactococcus genera were increased with formula feeding relative to sow feeding. In addition, relative to sow feeding, Anaerotruncus, Akkermansia, Enterococcus, Acinetobacter, Christensenella, and Holdemania were increased in milk-fed piglets, and Biliophila, Ruminococcus, Clostridium were increased in soy-fed piglets. No significant gut morphological changes were noted. However, higher cytokine mRNA expression (BMP4, CCL11, CCL21) was observed in the distal colon of formula groups. Formula feeding reduced enterochromaffin cell number and serotonin, but increased tryptamine levels relative to sow feeding. CONCLUSION Our data confirm that formula diet alters the colon microbiota and appears to shift tryptophan metabolism from serotonin to tryptamine, which may lead to greater histamine levels and risk of allergies in infants.
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Affiliation(s)
- Manish Kumar Saraf
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, USA
| | - Brian D. Piccolo
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, USA
| | - Anne K. Bowlin
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, USA
| | - Kelly E. Mercer
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, USA
| | - Tanya LeRoith
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland Regional College of Veterinary Medicine, Blacksburg, USA
| | - Sree V. Chintapalli
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, USA
| | - Kartik Shankar
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, USA
| | - Thomas M. Badger
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, USA
| | - Laxmi Yeruva
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, USA
- Arkansas Children’s Research Institute, Little Rock, USA
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Rothschild DE, Zhang Y, Diao N, Lee CK, Chen K, Caswell CC, Slade DJ, Helm RF, LeRoith T, Li L, Allen IC. Functional characterization of Irakm
rΔ9–11 splice variant in mice. The Journal of Immunology 2017. [DOI: 10.4049/jimmunol.198.supp.222.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Ulcerative colitis (UC) and Crohn’s disease (CD) are two pathologies collectively referred to as Inflammatory Bowel Disease (IBD). While a definitive etiology is currently unknown, a complex interplay of environmental factors and genetic predispositions has been linked to IBD development. The Toll-like receptors (TLRs) are a family of pattern recognition receptors (PPRs) involved in the signaling pathways that regulate the inflammatory response, and as such, represent essential targets for therapeutic intervention of UC and CD. Interleukin receptor associated kinase M (IRAKM) is an important negative regulator of TLR signaling acting to attenuate an overzealous innate immune response. Metadata analysis of human patient samples afflicted with IBD revealed increased expression of IRAKM compared to both healthy controls and patients with inactive forms of IBD. Furthermore, our findings in murine studies have identified that commercially available Irakm−/− mice contain a spliced mRNA variant of the Irakm gene as a result of the knockout strategy; defined here to be IrakmrΔ9–11. We have found that the truncated IrakmrΔ9–11 protein robustly activates a NF-κB dependent luciferase reporter when overexpressed in mammalian cells. These results, together with data supporting the mechanistic role of this truncated protein, suggest an alternative explanation for the function of IRAK-M in TLR signaling and in modulating gastrointestinal immune homeostasis with potential therapeutic implications for IBD patients.
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Affiliation(s)
- Daniel E Rothschild
- 1Virginia-Maryland College of Veterinary Medicine
- 2Virginia Polytechnic Inst. and State Univ
| | - Yao Zhang
- 2Virginia Polytechnic Inst. and State Univ
| | - Na Diao
- 2Virginia Polytechnic Inst. and State Univ
| | | | | | - Clayton C Caswell
- 1Virginia-Maryland College of Veterinary Medicine
- 2Virginia Polytechnic Inst. and State Univ
| | | | | | - Tanya LeRoith
- 1Virginia-Maryland College of Veterinary Medicine
- 2Virginia Polytechnic Inst. and State Univ
| | - Liwu Li
- 2Virginia Polytechnic Inst. and State Univ
| | - Irving C Allen
- 1Virginia-Maryland College of Veterinary Medicine
- 2Virginia Polytechnic Inst. and State Univ
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