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Reily C, Moldoveanu Z, Pramparo T, Hall S, Huang ZQ, Rice T, Novak L, Komers R, Jenkinson CP, Novak J. Sparsentan ameliorates glomerular hypercellularity and inflammatory-gene networks induced by IgA1-IgG immune complexes in a mouse model of IgA nephropathy. Am J Physiol Renal Physiol 2024; 326:F862-F875. [PMID: 38511222 DOI: 10.1152/ajprenal.00253.2023] [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: 08/22/2023] [Revised: 02/07/2024] [Accepted: 03/02/2024] [Indexed: 03/22/2024] Open
Abstract
IgA nephropathy (IgAN) is characterized by glomerular deposition of immune complexes (ICs) consisting of IgA1 with O-glycans deficient in galactose (Gd-IgA1) and Gd-IgA1-specific IgG autoantibodies. These ICs induce kidney injury, and in the absence of disease-specific therapy, up to 40% of patients with IgAN progress to kidney failure. IgA1 with its clustered O-glycans is unique to humans, which hampered development of small-animal models of IgAN. Here, we used a model wherein engineered ICs (EICs) formed from human Gd-IgA1 and recombinant human IgG autoantibody are injected into nude mice to induce glomerular injury mimicking human IgAN. In this model, we assessed the protective effects of sparsentan, a single-molecule dual endothelin angiotensin receptor antagonist (DEARA) versus vehicle on EIC-induced glomerular proliferation and dysregulation of gene expression in the kidney. Oral administration of sparsentan (60 or 120 mg/kg daily) to mice intravenously injected with EIC attenuated the EIC-induced glomerular hypercellularity. Furthermore, analysis of changes in the whole kidney transcriptome revealed that key inflammatory and proliferative biological genes and pathways that are upregulated in this EIC model of IgAN were markedly reduced by sparsentan, including complement genes, integrin components, members of the mitogen-activated protein kinase family, and Fc receptor elements. Partial overlap between mouse and human differentially expressed genes in IgAN further supported the translational aspect of the immune and inflammatory components from our transcriptional findings. In conclusion, our data indicate that in the mouse model of IgAN, sparsentan targets immune and inflammatory processes leading to protection from mesangial hypercellularity.NEW & NOTEWORTHY The mechanisms by which deposited IgA1 immune complexes cause kidney injury during early phases of IgA nephropathy are poorly understood. We used an animal model we recently developed that involves IgA1-IgG immune complex injections and determined pathways related to the induced mesangioproliferative changes. Treatment with sparsentan, a dual inhibitor of endothelin type A and angiotensin II type 1 receptors, ameliorated the induced mesangioproliferative changes and the associated alterations in the expression of inflammatory genes and networks.
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Affiliation(s)
- Colin Reily
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Zina Moldoveanu
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Tiziano Pramparo
- Travere Therapeutics Incorporated, San Diego, California, United States
| | - Stacy Hall
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Zhi-Qiang Huang
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Terri Rice
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Lea Novak
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Radko Komers
- Travere Therapeutics Incorporated, San Diego, California, United States
| | - Celia P Jenkinson
- Travere Therapeutics Incorporated, San Diego, California, United States
| | - Jan Novak
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States
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2
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Baty JJ, Stoner SN, McDaniel MS, Huffines JT, Edmonds SE, Evans NJ, Novak L, Scoffield JA. An oral commensal attenuates Pseudomonas aeruginosa-induced airway inflammation and modulates nitrite flux in respiratory epithelium. Microbiol Spectr 2023; 11:e0219823. [PMID: 37800950 PMCID: PMC10715204 DOI: 10.1128/spectrum.02198-23] [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: 05/24/2023] [Accepted: 08/14/2023] [Indexed: 10/07/2023] Open
Abstract
IMPORTANCE Respiratory infections are a leading cause of morbidity and mortality in people with cystic fibrosis (CF). These infections are polymicrobial in nature with overt pathogens and other colonizing microbes present. Microbiome data have indicated that the presence of oral commensal bacteria in the lungs is correlated with improved outcomes. We hypothesize that one oral commensal, Streptococcus parasanguinis, inhibits CF pathogens and modulates the host immune response. One major CF pathogen is Pseudomonas aeruginosa, a Gram-negative, opportunistic bacterium with intrinsic drug resistance and an arsenal of virulence factors. We have previously shown that S. parasanguinis inhibits P. aeruginosa in vitro in a nitrite-dependent manner through the production of reactive nitrogen intermediates. In this study, we demonstrate that while this mechanism is evident in a cell culture model of the CF airway, an alternative mechanism by which S. parasanguinis may improve outcomes for people with CF is through immunomodulation.
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Affiliation(s)
- Joshua J. Baty
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Sara N. Stoner
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Melissa S. McDaniel
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Joshua T. Huffines
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Sara E. Edmonds
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Nicholas J. Evans
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Lea Novak
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Jessica A. Scoffield
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
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3
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Billiot CE, Novak L, McDaniel MS, Lindgren NR, Swords WE. Pathogenesis of Achromobacter xylosoxidans respiratory infections: colonization, persistence, and transcriptome profiling in synthetic cystic fibrosis sputum medium. Infect Immun 2023; 91:e0041623. [PMID: 37909751 PMCID: PMC10715085 DOI: 10.1128/iai.00416-23] [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: 10/12/2023] [Accepted: 10/13/2023] [Indexed: 11/03/2023] Open
Abstract
Cystic fibrosis (CF) is a genetic disease affecting epithelial ion transport, resulting in thickened mucus and impaired mucociliary clearance. Persons with CF (pwCF) experience life-long infections of the respiratory mucosa caused by a diverse array of opportunists, which are leading causes of morbidity and mortality. In recent years, there has been increased appreciation for the range and diversity of microbes causing CF-related respiratory infections. The introduction of new therapeutics and improved detection methodology has revealed CF-related opportunists such as Achromobacter xylosoxidans (Ax). Ax is a Gram-negative bacterial species which is widely distributed in environmental sources and has been increasingly observed in sputa and other samples from pwCF, typically in patients in later stages of CF disease. In this study, we characterized CF clinical isolates of Ax and tested colonization and persistence of Ax in respiratory infection using immortalized human CF respiratory epithelial cells and BALB/c mice. Genomic analyses of clinical Ax isolates showed homologs for factors including flagellar synthesis, antibiotic resistance, and toxin secretion systems. Ax isolates adhered to polarized cultures of CFBE41o- human immortalized CF bronchial epithelial cells and caused significant cytotoxicity and depolarization of cell layers. Ax colonized and persisted in mouse lungs for up to 72 h post infection, with inflammatory consequences that include increased neutrophil influx in the lung, lung damage, cytokine production, and mortality. We also identified genes that are differentially expressed in synthetic CF sputum media. Based on these results, we conclude that Ax is an opportunistic pathogen of significance in CF.
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Affiliation(s)
- Caitlin E. Billiot
- Department of Medicine, Pulmonary, Allergy, and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
- Gregory Fleming James Center for Cystic Fibrosis Research, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Lea Novak
- Department of Pathology, Division of Anatomic Pathology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Melissa S. McDaniel
- Department of Medicine, Pulmonary, Allergy, and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
- Gregory Fleming James Center for Cystic Fibrosis Research, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Natalie R. Lindgren
- Department of Medicine, Pulmonary, Allergy, and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
- Gregory Fleming James Center for Cystic Fibrosis Research, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - W. Edward Swords
- Department of Medicine, Pulmonary, Allergy, and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
- Gregory Fleming James Center for Cystic Fibrosis Research, University of Alabama at Birmingham, Birmingham, Alabama, USA
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4
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Rizk DV, Novak L, Hall SD, Moldoveanu Z, Julian BA, Novak J, Haas M. Colocalization of IgG and IgA Heavy Chains with Kappa and Lambda Light Chains in Glomerular Deposits of IgA Nephropathy Patients Using High-Resolution Confocal Microscopy and Correlation with Oxford MEST-C Scores. J Clin Med 2023; 12:7361. [PMID: 38068413 PMCID: PMC10707091 DOI: 10.3390/jcm12237361] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/20/2023] [Accepted: 11/23/2023] [Indexed: 02/12/2024] Open
Abstract
Routine immunofluorescence microscopy of glomerular immunodeposits in IgA nephropathy shows IgA, C3, and lambda light chains, and sometimes IgG, IgM, and kappa light chains. However, a previous study using high-resolution confocal microscopy showed IgG in all IgA nephropathy cases, likely representing autoantibodies specific for galactose-deficient IgA1. Here, we used high-resolution confocal microscopy to examine the composition of glomerular immunodeposits and colocalization of kappa and lambda light chains with IgA or IgG heavy chains in kidney-biopsy samples from twenty patients with IgA nephropathy, seventeen without IgG, and nine with no or trace kappa light chains by routine immunofluorescence microscopy. IgG was detected in all biopsies by high-resolution confocal microscopy. Single-optical-plane images showed similar colocalization of IgG heavy chains with kappa and lambda light chains. Colocalization of IgA heavy chains was greater with lambda light chains than with kappa light chains. Colocalization of IgG heavy chain with kappa light chains was higher than with lambda light chains in biopsies with endocapillary hypercellularity and crescents, i.e., biopsies with active lesions. We confirmed the utility of high-resolution confocal microscopy to detect components of glomerular immunodeposits not apparent on routine immunofluorescence microscopy and for colocalization of different components, potentially clarifying the pathogenesis of IgA nephropathy.
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Affiliation(s)
- Dana V. Rizk
- Department of Medicine, Division of Nephrology, University of Alabama at Birmingham, Birmingham, AL 35294, USA;
| | - Lea Novak
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (L.N.); (S.D.H.); (Z.M.); (J.N.)
| | - Stacy D. Hall
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (L.N.); (S.D.H.); (Z.M.); (J.N.)
| | - Zina Moldoveanu
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (L.N.); (S.D.H.); (Z.M.); (J.N.)
| | - Bruce A. Julian
- Department of Medicine, Division of Nephrology, University of Alabama at Birmingham, Birmingham, AL 35294, USA;
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (L.N.); (S.D.H.); (Z.M.); (J.N.)
| | - Jan Novak
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (L.N.); (S.D.H.); (Z.M.); (J.N.)
| | - Mark Haas
- Department of Pathology & Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA;
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5
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Harris ES, Novak L, Fernandez-Petty CM, Lindgren NR, Baker SM, Birket SE, Rowe SM. SNSP113 (PAAG) improves mucociliary transport and lung pathology in the Scnn1b-Tg murine model of CF lung disease. J Cyst Fibros 2023; 22:1104-1112. [PMID: 37714777 PMCID: PMC10843010 DOI: 10.1016/j.jcf.2023.08.011] [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: 02/22/2023] [Revised: 07/25/2023] [Accepted: 08/29/2023] [Indexed: 09/17/2023]
Abstract
BACKGROUND Mucus stasis, a hallmark of muco-obstructive disease, results from impaired mucociliary transport and leads to lung function decline and chronic infection. Although therapeutics that target mucus stasis in the airway, such as hypertonic saline or rhDNAse, show some therapeutic benefit, they do not address the underlying electrostatic defect apparent in mucins in CF and related conditions. We have previously shown poly (acetyl, arginyl) glucosamine (PAAG, developed as SNSP113), a soluble, cationic polymer, significantly improves mucociliary transport in a rat model of CF by normalizing the charge defects of CF mucin. Here, we report efficacy in the CFTR-sufficient, ENaC hyperactive, Scnn1b-Tg mouse model that develops airway muco-obstruction due to sodium hyperabsorption and airway dehydration. METHODS Scnn1b-Tg mice were treated with either 250 µg/mL SNSP113 or vehicle control (1.38% glycerol in PBS) via nebulization once daily for 7 days and then euthanized for analysis. Micro-Optical Coherence Tomography-based evaluation of excised mouse trachea was used to determine the effect on the functional microanatomy. Tissue analysis was performed by routine histopathology. RESULTS Nebulized treatment of SNSP113 significantly improved mucociliary transport in the airways of Scnn1b-Tg mice, without altering the airway surface or periciliary liquid layer. In addition, SNSP113 significantly reversed epithelial hypertrophy and goblet cell metaplasia. Finally, SNSP113 significantly ameliorated eosinophilic crystalline pneumonia and lung consolidation in addition to inflammatory macrophage influx in this model. CONCLUSION Overall, this study extends the efficacy of SNSP113 as a potential therapeutic to alleviate mucus stasis in muco-obstructive diseases in CF and potentially in related conditions.
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Affiliation(s)
- Elex S Harris
- Gregory Fleming James Cystic Fibrosis Research Center, Univ. of Alabama at Birmingham, Birmingham, AL, USA
| | - Lea Novak
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Courtney M Fernandez-Petty
- Gregory Fleming James Cystic Fibrosis Research Center, Univ. of Alabama at Birmingham, Birmingham, AL, USA
| | - Natalie R Lindgren
- Gregory Fleming James Cystic Fibrosis Research Center, Univ. of Alabama at Birmingham, Birmingham, AL, USA
| | | | - Susan E Birket
- Gregory Fleming James Cystic Fibrosis Research Center, Univ. of Alabama at Birmingham, Birmingham, AL, USA; Departments of Pediatrics, and Cell Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Steven M Rowe
- Gregory Fleming James Cystic Fibrosis Research Center, Univ. of Alabama at Birmingham, Birmingham, AL, USA; Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA; Departments of Pediatrics, and Cell Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, USA.
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6
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Stoner SN, Baty JJ, Novak L, Scoffield JA. Commensal colonization reduces Pseudomonas aeruginosa burden and subsequent airway damage. Front Cell Infect Microbiol 2023; 13:1144157. [PMID: 37305417 PMCID: PMC10248150 DOI: 10.3389/fcimb.2023.1144157] [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: 01/13/2023] [Accepted: 05/15/2023] [Indexed: 06/13/2023] Open
Abstract
Pseudomonas aeruginosa dominates the complex polymicrobial cystic fibrosis (CF) airway and is a leading cause of death in persons with CF. Interestingly, oral streptococcal colonization has been associated with stable CF lung function. The most abundant streptococcal species found in stable patients, Streptococcus salivarius, has been shown to downregulate pro-inflammatory cytokines in multiple colonization models. However, no studies have demonstrated how S. salivarius potentially improves lung function. Our lab previously demonstrated that the P. aeruginosa exopolysaccharide Psl promotes S. salivarius biofilm formation in vitro, suggesting a possible mechanism by which S. salivarius is incorporated into the CF airway microbial community. In this study, we demonstrate that co-infection of rats leads to enhanced S. salivarius colonization and reduced P. aeruginosa colonization. Histological scores for tissue inflammation and damage are lower in dual-infected rats compared to P. aeruginosa infected rats. Additionally, pro-inflammatory cytokines IL-1β, IL-6, CXCL2, and TNF-α are downregulated during co-infection compared to P. aeruginosa single-infection. Lastly, RNA sequencing of cultures grown in synthetic CF sputum revealed that P. aeruginosa glucose metabolism genes are downregulated in the presence of S. salivarius, suggesting a potential alteration in P. aeruginosa fitness during co-culture. Overall, our data support a model in which S. salivarius colonization is promoted during co-infection with P. aeruginosa, whereas P. aeruginosa airway bacterial burden is reduced, leading to an attenuated host inflammatory response.
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Affiliation(s)
| | | | | | - Jessica A. Scoffield
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, United States
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7
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Lindgren NR, McDaniel MS, Novak L, Swords WE. Acute polymicrobial airway infections: analysis in cystic fibrosis mice. Microbiology (Reading) 2023; 169:001290. [PMID: 36748431 PMCID: PMC9993112 DOI: 10.1099/mic.0.001290] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Cystic fibrosis (CF) is a genetic disorder affecting epithelial ion transport, which among other impacts results in defective mucociliary clearance and innate defenses in the respiratory tract. Consequently, people with CF experience lifelong infections of the respiratory mucosa that are chronic and polymicrobial in nature. Young children with CF are initially colonized by opportunists like nontypeable Haemophilus influenzae (NTHi), which normally resides within the microbiome of the nasopharynx and upper airways and can also cause infections of the respiratory mucosa that include bronchitis and otitis media. NTHi is typically supplanted by other microbes as patients age; for example, people with CF are often chronically infected with mucoid strains of Pseudomonas aeruginosa, which prior work in our laboratory has shown to promote colonization and persistence by other opportunists that include Stenotrophomonas maltophilia. Our previous work has shown that polymicrobial infection impacts host colonization and persistence of incoming microbes via diverse mechanisms that include priming of host immunity that can promote microbial clearance, and cooperativity within polymicrobial biofilms, which can promote persistence. In infection studies with BALB/c Cftrtm1UNC mice, results showed, as previously observed for WT BALB/c mice, preceding infection with NTHi decreased colonization and persistence by P. aeruginosa. Likewise, polymicrobial infection of BALB/c Cftrtm1UNC and C57BL/6 Cftrtm1UncTg(FABPhCFTR)1Jaw/J mice showed correlation between S. maltophilia and P. aeruginosa, with increased bacterial colonization and lung pathology. Based on these results, we conclude that our previous observations regarding polymicrobial infections with CF opportunists in WT mice are also validated using CF mice.
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Affiliation(s)
- Natalie R Lindgren
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Alabama, Birmingham, USA.,Gregory Fleming James Center for Cystic Fibrosis Research, University of Alabama, Birmingham, Birmingham, USA
| | - Melissa S McDaniel
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Alabama, Birmingham, USA.,Gregory Fleming James Center for Cystic Fibrosis Research, University of Alabama, Birmingham, Birmingham, USA
| | - Lea Novak
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, USA
| | - W Edward Swords
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Alabama, Birmingham, USA.,Gregory Fleming James Center for Cystic Fibrosis Research, University of Alabama, Birmingham, Birmingham, USA
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Morante S, Botticelli S, Chiaraluce R, Consalvi V, La Penna G, Novak L, Pasquo A, Petrosino M, Proux O, Rossi G, Salina G, Stellato F. Metal Ion Binding in Wild-Type and Mutated Frataxin: A Stability Study. Front Mol Biosci 2022; 9:878017. [PMID: 35712353 PMCID: PMC9195147 DOI: 10.3389/fmolb.2022.878017] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 04/12/2022] [Indexed: 11/13/2022] Open
Abstract
This work studies the stability of wild-type frataxin and some of its variants found in cancer tissues upon Co2+ binding. Although the physiologically involved metal ion in the frataxin enzymatic activity is Fe2+, as it is customarily done, Co2+ is most often used in experiments because Fe2+ is extremely unstable owing to the fast oxidation reaction Fe2+ → Fe3+. Protein stability is monitored following the conformational changes induced by Co2+ binding as measured by circular dichroism, fluorescence spectroscopy, and melting temperature measurements. The stability ranking among the wild-type frataxin and its variants obtained in this way is confirmed by a detailed comparative analysis of the XAS spectra of the metal-protein complex at the Co K-edge. In particular, a fit to the EXAFS region of the spectrum allows positively identifying the frataxin acidic ridge as the most likely location of the metal-binding sites. Furthermore, we can explain the surprising feature emerging from a detailed analysis of the XANES region of the spectrum, showing that the longer 81-210 frataxin fragment has a smaller propensity for Co2+ binding than the shorter 90-210 one. This fact is explained by the peculiar role of the N-terminal disordered tail in modulating the protein ability to interact with the metal.
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Affiliation(s)
- S. Morante
- Dipartimento di Fisica, Universitá di Roma Tor Vergata, Rome, Italy
- INFN, Sezione di Roma Tor Vergata, Rome, Italy
- *Correspondence: S. Morante ,
| | - S. Botticelli
- Dipartimento di Fisica, Universitá di Roma Tor Vergata, Rome, Italy
- INFN, Sezione di Roma Tor Vergata, Rome, Italy
| | - R. Chiaraluce
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Sapienza Universitá di Roma, Rome, Italy
| | - V. Consalvi
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Sapienza Universitá di Roma, Rome, Italy
| | - G. La Penna
- INFN, Sezione di Roma Tor Vergata, Rome, Italy
- CNR—Istituto di Chimica dei Composti Organometallici, Firenze, Italy
| | - L. Novak
- Dipartimento di Scienze Biochimiche “A. Rossi Fanelli”, Sapienza Universitá di Roma, Rome, Italy
| | - A. Pasquo
- ENEA CR Frascati, Diagnostics and Metrology Laboratory FSN-TECFIS-DIM, Frascati, Italy
| | - M. Petrosino
- Chair of Pharmacology, Section of Medicine, University of Fribourg, Fribourg, Switzerland
| | - O. Proux
- Observatoire des Sciences de L’Univers de Grenoble, UAR 832 CNRS, Université Grenoble Alpes, Grenoble, France
| | - G. Rossi
- Dipartimento di Fisica, Universitá di Roma Tor Vergata, Rome, Italy
- INFN, Sezione di Roma Tor Vergata, Rome, Italy
- Museo Storico della Fisica e Centro Studi e Ricerche E. Fermi, Roma, Italy
| | - G. Salina
- INFN, Sezione di Roma Tor Vergata, Rome, Italy
| | - F. Stellato
- Dipartimento di Fisica, Universitá di Roma Tor Vergata, Rome, Italy
- INFN, Sezione di Roma Tor Vergata, Rome, Italy
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Bian Q, Anderson JC, Zhang XW, Huang ZQ, Ebefors K, Nyström J, Hall S, Novak L, Julian BA, Willey CD, Novak J. Mesangioproliferative Kidney Diseases and Platelet-Derived Growth Factor-Mediated AXL Phosphorylation. Kidney Med 2021; 3:1003-1013.e1. [PMID: 34939009 PMCID: PMC8664734 DOI: 10.1016/j.xkme.2021.06.007] [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] [Indexed: 10/25/2022] Open
Abstract
Rationale & Objective Immunoglobulin A nephropathy (IgAN) is a common glomerular disease, with mesangial cell proliferation as a major feature. There is no disease-specific treatment. Platelet-derived growth factor (PDGF) contributes to the pathogenesis of IgAN. To better understand its pathogenic mechanisms, we assessed PDGF-mediated AXL phosphorylation in human mesangial cells and kidney tissue biopsy specimens. Study Design Immunostaining using human kidney biopsy specimens and in vitro studies using primary human mesangial cells. Setting & Participants Phosphorylation of AXL was assessed in cultured mesangial cells and 10 kidney-biopsy specimens from 5 patients with IgAN, 3 with minimal change disease, 1 with membranous nephropathy, and 1 with mesangioproliferative glomerulonephritis (GN). Predictor Glomerular staining for phospho-AXL in kidney biopsy specimens of patients with mesangioproliferative diseases. Outcomes Phosphorylated AXL detected in biopsy tissues of patients with IgAN and mesangioproliferative GN and in cultured mesangial cells stimulated with PDGF. Analytic Approach t test, Mann-Whitney test, and analysis of variance were used to assess the significance of mesangial cell proliferative changes. Results Immunohistochemical staining revealed enhanced phosphorylation of glomerular AXL in IgAN and mesangioproliferative GN, but not in minimal change disease and membranous nephropathy. Confocal-microscopy immunofluorescence analysis indicated that mesangial cells rather than endothelial cells or podocytes expressed phospho-AXL. Kinomic profiling of primary mesangial cells treated with PDGF revealed activation of several protein-tyrosine kinases, including AXL. Immunoprecipitation experiments indicated association of AXL and PDGF receptor proteins. An AXL-specific inhibitor (bemcentinib) partially blocked PDGF-induced cellular proliferation and reduced phosphorylation of AXL and PDGF receptor and the downstream signals (AKT1 and ERK1/2). Limitations Small number of kidney biopsy specimens to correlate the activation of AXL with disease severity. Conclusions PDGF-mediated signaling in mesangial cells involves transactivation of AXL. Finding appropriate inhibitors to block PDGF-mediated transactivation of AXL may provide new therapeutic options for mesangioproliferative kidney diseases such as IgAN.
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Affiliation(s)
- Qi Bian
- University of Alabama at Birmingham, Birmingham, AL.,Changhai Hospital, Second Military Medical University/Naval Medical University, Shanghai, China
| | | | - Xian Wen Zhang
- University of Alabama at Birmingham, Birmingham, AL.,Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | | | | | | | - Stacy Hall
- University of Alabama at Birmingham, Birmingham, AL
| | - Lea Novak
- University of Alabama at Birmingham, Birmingham, AL
| | | | | | - Jan Novak
- University of Alabama at Birmingham, Birmingham, AL
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10
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Dholakia J, Scalise CB, Katre AA, Goldsberry WN, Meza-Perez S, Randall TD, Norian LA, Novak L, Arend RC. Sequential modulation of the Wnt/β-catenin signaling pathway enhances tumor-intrinsic MHC I expression and tumor clearance. Gynecol Oncol 2021; 164:170-180. [PMID: 34844776 DOI: 10.1016/j.ygyno.2021.09.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 07/13/2021] [Revised: 09/01/2021] [Accepted: 09/07/2021] [Indexed: 12/31/2022]
Abstract
BACKGROUND Progress in immunotherapy use for gynecologic malignancies is hampered by poor tumor antigenicity and weak T cell infiltration of the tumor microenvironment (TME). Wnt/β-catenin pathway modulation demonstrated patient benefit in clinical trials as well as enhanced immune cell recruitment in preclinical studies. The purpose of this study was to characterize the pathways by which Wnt/β-catenin modulation facilitates a more immunotherapy-favorable TME. METHODS Human tumor samples and in vivo patient-derived xenograft and syngeneic murine models were administered Wnt/β-catenin modulating agents DKN-01 and CGX-1321 individually or in sequence. Analytical methods included immunohistochemistry, flow cytometry, multiplex cytokine/chemokine array, and RNA sequencing. RESULTS DKK1 blockade via DKN-01 increased HLA/MHC expression in human and murine tissues, correlating with heightened expression of known MHC I regulators: NFkB, IL-1, LPS, and IFNy. PORCN inhibition via CGX-1321 increased production of T cell chemoattractant CXCL10, providing a mechanism for observed increases in intra-tumoral T cells. Diverse leukocyte recruitment was noted with elevations in B cells and macrophages, with increased tumor expression of population-specific chemokines. Sequential DKK1 blockade and PORCN inhibition decreased tumor burden as evidenced by reduced omental weights. CONCLUSIONS Wnt/β-catenin pathway modulation increases MHC I expression and promotes tumor leukocytic infiltration, facilitating a pro-immune TME associated with decreased tumor burden. This intervention overcomes common tumor immune-evasion mechanisms and may render ovarian tumors susceptible to immunotherapy.
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Affiliation(s)
- Jhalak Dholakia
- University of Alabama in Birmingham, Division of Gynecologic Oncology, Birmingham, AL, United States of America
| | - Carly B Scalise
- University of Alabama in Birmingham, Division of Gynecologic Oncology, Birmingham, AL, United States of America
| | - Ashwini A Katre
- University of Alabama in Birmingham, Division of Gynecologic Oncology, Birmingham, AL, United States of America
| | - Whitney N Goldsberry
- University of Alabama in Birmingham, Division of Gynecologic Oncology, Birmingham, AL, United States of America
| | - Selene Meza-Perez
- University of Alabama at Birmingham, Division of Immunology & Rheumatology, Birmingham, AL, United States of America
| | - Troy D Randall
- University of Alabama at Birmingham, Division of Immunology & Rheumatology, Birmingham, AL, United States of America; University of Alabama at Birmingham, O'Neal Comprehensive Cancer Center, Birmingham, AL, United States of America
| | - Lyse A Norian
- University of Alabama at Birmingham, O'Neal Comprehensive Cancer Center, Birmingham, AL, United States of America; University of Alabama at Birmingham, Department of Nutrition Sciences, Birmingham, AL, United States of America
| | - Lea Novak
- University of Alabama at Birmingham, Department of Anatomic Pathology, Birmingham, AL, United States of America
| | - Rebecca C Arend
- University of Alabama in Birmingham, Division of Gynecologic Oncology, Birmingham, AL, United States of America; University of Alabama at Birmingham, O'Neal Comprehensive Cancer Center, Birmingham, AL, United States of America.
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11
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Lindgren N, Novak L, McDaniel M, Swords W. 424: Impact of sequentially introduced non-typeable Haemophilus influenzae and Pseudomonas aeruginosa on CF lungs. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01848-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Lai L, Liu S, Azrad M, Hall S, Hao C, Novak J, Julian BA, Novak L. IgA Vasculitis with Nephritis in Adults: Histological and Clinical Assessment. J Clin Med 2021; 10:4851. [PMID: 34768371 PMCID: PMC8584405 DOI: 10.3390/jcm10214851] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/13/2021] [Accepted: 10/17/2021] [Indexed: 02/07/2023] Open
Abstract
Patients with IgA vasculitis (IgAV), an immune complex-mediated disease, may exhibit kidney involvement-IgAV with nephritis (IgAVN). The kidney-biopsy histopathologic features of IgAVN are similar to those of IgA nephropathy, but little is known about histopathologic disease severity based on the interval between purpura onset and diagnostic kidney biopsy. We assessed kidney histopathology and clinical and laboratory data in a cohort of adult patients with IgAVN (n = 110). The cases were grouped based on the interval between the onset of purpura and kidney biopsy: Group 1 (G1, <1 month, n = 14), Group 2 (G2, 1-6 months, n = 58), and Group 3 (G3, >6 months, n = 38). Glomerular leukocytes were more common in G1 than in the other groups (p = 0.0008). The proportion of neutrophils among peripheral-blood leukocytes was the highest in the patients biopsied within a month after onset of purpura (G1: 71 ± 8%). In the patients with an interval >6 months, the neutrophil proportion was lower, 60%. Moreover, the glomerular mesangial proliferation score correlated with the serum total IgA concentration (p = 0.0056). In conclusion, IgAVN patients biopsied <1 month from purpura onset showed an elevated percentage of blood neutrophils and glomerular leukocytes, consistent with an acute-onset inflammatory reaction. In all IgAVN patients, the mesangial proliferation score correlated with the serum IgA level.
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Affiliation(s)
- Lingyun Lai
- Division of Nephrology, Fudan University Huashan Hospital, Shanghai 200040, China; (L.L.); (S.L.); (C.H.)
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (S.H.); (J.N.)
| | - Shaojun Liu
- Division of Nephrology, Fudan University Huashan Hospital, Shanghai 200040, China; (L.L.); (S.L.); (C.H.)
| | - Maria Azrad
- Department of Nutrition, University of Alabama at Birmingham, Birmingham, AL 35294, USA;
| | - Stacy Hall
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (S.H.); (J.N.)
| | - Chuanming Hao
- Division of Nephrology, Fudan University Huashan Hospital, Shanghai 200040, China; (L.L.); (S.L.); (C.H.)
| | - Jan Novak
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (S.H.); (J.N.)
| | - Bruce A. Julian
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA;
| | - Lea Novak
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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13
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Stenina IA, Yurova PA, Novak L, Achoh AR, Zabolotsky VI, Yaroslavtsev AB. Improvement of ion conductivity and selectivity of heterogeneous membranes by sulfated zirconia modification. Colloid Polym Sci 2021. [DOI: 10.1007/s00396-020-04800-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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Moldoveanu Z, Suzuki H, Reily C, Satake K, Novak L, Xu N, Huang ZQ, Knoppova B, Khan A, Hall S, Yanagawa H, Brown R, Winstead CJ, O'Quinn DB, Weinmann A, Gharavi AG, Kiryluk K, Julian BA, Weaver CT, Suzuki Y, Novak J. Experimental evidence of pathogenic role of IgG autoantibodies in IgA nephropathy. J Autoimmun 2021; 118:102593. [PMID: 33508637 DOI: 10.1016/j.jaut.2021.102593] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [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: 11/08/2020] [Revised: 12/30/2020] [Accepted: 12/31/2020] [Indexed: 01/13/2023]
Abstract
BACKGROUND IgA nephropathy is thought to be an autoimmune disease wherein galactose-deficient IgA1 (Gd-IgA1) is recognized by IgG autoantibodies, resulting in formation and renal accumulation of nephritogenic immune complexes. Although this hypothesis is supported by recent findings that, in renal immunodeposits of IgA nephropathy patients, IgG is enriched for Gd-IgA1-specific autoantibodies, experimental proof is still lacking. METHODS IgG isolated from sera of IgA nephropathy patients or produced as a recombinant IgG (rIgG) was mixed with human Gd-IgA1 to form immune complexes. IgG from healthy individuals served as a control. Nude and SCID mice were injected with human IgG and Gd-IgA1, in immune complexes or individually, and their presence in kidneys was ascertained by immunofluorescence. Pathologic changes in the glomeruli were evaluated by quantitative morphometry and exploratory transcriptomic profiling was performed by RNA-Seq. RESULTS Immunodeficient mice injected with Gd-IgA1 mixed with IgG autoantibodies from patients with IgA nephropathy, but not Gd-IgA1 mixed with IgG from healthy individuals, displayed IgA, IgG, and mouse complement C3 glomerular deposits and mesangioproliferative glomerular injury with hematuria and proteinuria. Un-complexed Gd-IgA1 or IgG did not induce pathological changes. Moreover, Gd-IgA1-rIgG immune complexes injected into immunodeficient mice induced histopathological changes characteristic of human disease. Exploratory transcriptome profiling of mouse kidney tissues indicated that these immune complexes altered gene expression of multiple pathways, in concordance with the changes observed in kidney biopsies of patients with IgA nephropathy. CONCLUSIONS This study provides the first in vivo evidence for a pathogenic role of IgG autoantibodies specific for Gd-IgA1 in the pathogenesis of IgA nephropathy.
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Affiliation(s)
| | - Hitoshi Suzuki
- University of Alabama at Birmingham, Birmingham, AL, USA; Department of Nephrology, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Colin Reily
- University of Alabama at Birmingham, Birmingham, AL, USA
| | - Kenji Satake
- Department of Nephrology, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Lea Novak
- University of Alabama at Birmingham, Birmingham, AL, USA
| | - Nuo Xu
- University of Alabama at Birmingham, Birmingham, AL, USA
| | | | | | - Atlas Khan
- Department of Medicine, Division of Nephrology, College of Physicians & Surgeons, Columbia University, New York, NY, USA
| | - Stacy Hall
- University of Alabama at Birmingham, Birmingham, AL, USA
| | - Hiroyuki Yanagawa
- Department of Nephrology, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Rhubell Brown
- University of Alabama at Birmingham, Birmingham, AL, USA
| | | | | | - Amy Weinmann
- University of Alabama at Birmingham, Birmingham, AL, USA
| | - Ali G Gharavi
- Department of Medicine, Division of Nephrology, College of Physicians & Surgeons, Columbia University, New York, NY, USA
| | - Krzysztof Kiryluk
- Department of Medicine, Division of Nephrology, College of Physicians & Surgeons, Columbia University, New York, NY, USA
| | - Bruce A Julian
- University of Alabama at Birmingham, Birmingham, AL, USA
| | - Casey T Weaver
- University of Alabama at Birmingham, Birmingham, AL, USA
| | - Yusuke Suzuki
- Department of Nephrology, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Jan Novak
- University of Alabama at Birmingham, Birmingham, AL, USA.
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15
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Pier B, Crellin C, Katre A, Conner MG, Novak L, Young SL, Arend R. Large, Non-Cavity Distorting Intramural Leiomyomas Decrease Leukemia Inhibitory Factor in the Secretory Phase Endometrium. Reprod Sci 2020; 27:569-574. [PMID: 32046421 PMCID: PMC7539805 DOI: 10.1007/s43032-019-00056-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 02/19/2019] [Accepted: 06/07/2019] [Indexed: 12/11/2022]
Abstract
Despite mounting evidence that large intramural leiomyomas decrease fecundity during in vitro fertilization cycles, few studies have demonstrated a mechanism for this impact. We hypothesize that large intramural leiomyomas (IM) decrease the expression of endometrial implantation factors during the window of implantation. We prospectively recruited sub-fertile patients with IM 3 cm or greater in size planning myomectomy and performed endometrial biopsies the day of planned myomectomy (n = 9). Preoperative screening demonstrated no intercavitary lesions. Control endometrial samples were obtained from young, normally menstruating women free of uterine leiomyomas (n = 8). Endometrial samples were obtained in the mid-secretory phase (average cycle day for control patients and intramural leiomyoma patients were 24.5 and 21.3, respectively). Expression of implantation markers HOXA10, leukemia inhibitory factor (LIF), ER-α, and PR was compared using quantitative immunohistochemistry. Standard descriptive statistics were used to compare H-scores between the cohorts. Patients with intramural leiomyomas were found to have decreased LIF compared to controls (p value < 0.001). Expressions of HOXA10 and PR were no different between cohorts; however, ER-α showed a trend toward increased expression in the fibroid cohort (p value 0.07). LIF is downregulated in the endometrium of patients with large IM. This study is among the first to show decreased LIF expression in patients with uterine leiomyomas. We hypothesize that this difference from previously published work is due to sampling the endometrium at the height of LIF expression. Further work is needed to show if LIF downregulation is corrected with leiomyoma resection.
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Affiliation(s)
- Bruce Pier
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Tripler Army Medical Center, Jarrett White Road, Honolulu, Hawaii 96859 USA
| | - Christopher Crellin
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Tripler Army Medical Center, Jarrett White Road, Honolulu, Hawaii 96859 USA
| | - Ashwini Katre
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, USA
| | - Michael G. Conner
- Department of Pathology, University of Alabama at Birmingham, Birmingham, USA
| | - Lea Novak
- Department of Pathology, University of Alabama at Birmingham, Birmingham, USA
| | - Steven L Young
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, University of North Carolina at Chapel Hill, North Carolina, USA
| | - Rebecca Arend
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, USA
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16
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Rizk DV, Saha MK, Hall S, Novak L, Brown R, Huang ZQ, Fatima H, Julian BA, Novak J. Glomerular Immunodeposits of Patients with IgA Nephropathy Are Enriched for IgG Autoantibodies Specific for Galactose-Deficient IgA1. J Am Soc Nephrol 2019; 30:2017-2026. [PMID: 31444275 DOI: 10.1681/asn.2018111156] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [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: 11/24/2018] [Accepted: 07/12/2019] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND IgA nephropathy (IgAN) is the leading primary GN worldwide. The disease is thought to result from glomerular deposition of circulating immune complexes of IgG bound to galactose-deficient IgA1 (Gd-IgA1). However, routine immunofluorescence microscopy fails to detect IgG in many kidney biopsies from patients with IgAN and the specificity of IgG in immunodeposits has not been tested. METHODS We used remnant frozen kidney-biopsy specimens from 34 patients with IgAN; 14 were IgG-positive and 20 were IgG-negative by routine immunofluorescence microscopy. Six patients with primary membranous nephropathy (MN) and eight with lupus nephritis (LN) served as controls. IgG in the kidney tissue was extracted and its amount determined by ELISA. IgG molecular integrity was assessed by SDS-PAGE immunoblotting. Antigenic specificity of extracted IgG was determined by ELISA using phospholipase A2 receptor (PLA2R) or Gd-IgA1 as antigen. In addition, ten other IgAN cases, six IgG-positive and four IgG-negative by routine immunofluorescence, were used for colocalization studies by confocal microscopy. RESULTS IgG extracted from MN but not IgAN immunodeposits reacted with PLA2R. Conversely, IgG extracted from IgAN but not MN or LN immunodeposits reacted with Gd-IgA1. Even IgAN kidney-biopsy specimens without IgG by routine immunofluorescence microscopy had IgG specific for Gd-IgA1. Confocal microscopy confirmed the presence of IgG in the IgAN biopsies with colocalization of glomerular IgA and IgG. CONCLUSIONS These results reveal for the first time that IgAN kidney biopsies, with or without IgG by routine immunofluorescence, contain Gd-IgA1-specific IgG autoantibodies. These findings support the importance of these autoantibodies in the pathogenesis of IgAN.
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Affiliation(s)
- Dana V Rizk
- Division of Nephrology, Department of Medicine,
| | | | | | - Lea Novak
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama
| | | | | | - Huma Fatima
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Bruce A Julian
- Division of Nephrology, Department of Medicine.,Department of Microbiology, and
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17
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Akberova E, Vasil'eva V, Zabolotsky V, Novak L. Effect of the sulfocation-exchanger dispersity on the surface morphology, microrelief of heterogeneous membranes and development of electroconvection in intense current modes. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.08.042] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Shenoy AT, Beno SM, Brissac T, Bell JW, Novak L, Orihuela CJ. Severity and properties of cardiac damage caused by Streptococcus pneumoniae are strain dependent. PLoS One 2018; 13:e0204032. [PMID: 30216364 PMCID: PMC6138390 DOI: 10.1371/journal.pone.0204032] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 08/31/2018] [Indexed: 01/15/2023] Open
Abstract
Streptococcus pneumoniae is an opportunistic Gram-positive pathogen that can cause invasive disease. Recent studies have shown that S. pneumoniae is able to invade the myocardium and kill cardiomyocytes, with one-in-five adults hospitalized for pneumococcal pneumonia having a pneumonia-associated adverse cardiac event. Furthermore, clinical reports have shown up to a 10-year increased risk of adverse cardiac events in patients formerly hospitalized for pneumococcal bacteremia. In this study, we investigated the ability of nine S. pneumoniae clinical isolates, representing eight unique serotypes, to cause cardiac damage in a mouse model of invasive disease. Following intraperitoneal challenge of C57BL/6 mice, four of these strains (D39, WU2, TIGR4, and 6A-10) caused high-grade bacteremia, while CDC7F:2617-97 and AMQ16 caused mid- and low-grade bacteremia, respectively. Three strains did not cause any discernible disease. Of note, only the strains capable of high-grade bacteremia caused cardiac damage, as inferred by serum levels of cardiac troponin-I. This link between bacteremia and heart damage was further corroborated by Hematoxylin & Eosin and Trichrome staining which showed cardiac cytotoxicity only in D39, WU2, TIGR4, and 6A-10 infected mice. Finally, hearts infected with these strains showed varying histopathological characteristics, such as differential lesion formation and myocytolysis, suggesting that the mechanism of heart damage varied between strains.
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Affiliation(s)
- Anukul T. Shenoy
- Department of Microbiology, The University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Sarah M. Beno
- Department of Microbiology, The University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Terry Brissac
- Department of Microbiology, The University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Jeremiah W. Bell
- Department of Microbiology, The University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Lea Novak
- Department of Pathology, The University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Carlos J. Orihuela
- Department of Microbiology, The University of Alabama at Birmingham, Birmingham, Alabama, United States of America
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19
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Michael Straughn J, Boitano T, Smith HJ, Dilley SE, Liang MI, Novak L. Treatment of low-grade endometrial stromal sarcoma in a nulligravid woman. Gynecol Oncol 2018; 151:6-9. [PMID: 29887484 DOI: 10.1016/j.ygyno.2018.05.027] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A 32 year-old nulligravid woman with a uterine mass underwent exploratory laparotomy with myomectomy. Final pathology revealed a low-grade endometrial stromal sarcoma (ESS) with positive margins. She subsequently underwent definitive robotic hysterectomy and bilateral salpingectomy with ovarian preservation. She was diagnosed with a stage IB low-grade ESS. She is currently undergoing observation. Discussion of classification, surgical options, and adjuvant therapy is presented.
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Affiliation(s)
- J Michael Straughn
- University of Alabama at Birmingham, Division of Gynecologic Oncology, United States.
| | - Teresa Boitano
- University of Alabama at Birmingham, Division of Gynecologic Oncology, United States
| | - Haller J Smith
- University of Alabama at Birmingham, Division of Gynecologic Oncology, United States
| | - Sarah E Dilley
- University of Alabama at Birmingham, Division of Gynecologic Oncology, United States
| | - Margaret I Liang
- University of Alabama at Birmingham, Division of Gynecologic Oncology, United States
| | - Lea Novak
- University of Alabama at Birmingham, Department of Pathology, United States
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20
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Arend RC, Londoño AI, Montgomery AM, Smith HJ, Dobbin ZC, Katre AA, Martinez A, Yang ES, Alvarez RD, Huh WK, Bevis KS, Straughn JM, Estes JM, Novak L, Crossman DK, Cooper SJ, Landen CN, Leath CA. Molecular Response to Neoadjuvant Chemotherapy in High-Grade Serous Ovarian Carcinoma. Mol Cancer Res 2018. [PMID: 29523763 DOI: 10.1158/1541-7786.mcr-17-0594] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
While high-grade serous ovarian carcinoma (HGSOC) is the most common histologic subtype of ovarian cancer, significant tumor heterogeneity exists. In addition, chemotherapy induces changes in gene expression and alters the mutational profile. To evaluate the notion that patients with HGSOC could be better classified for optimal treatment based on gene expression, we compared genetic variants [by DNA next-generation sequencing (NGS) using a 50 gene Ion Torrent panel] and gene expression (using the NanoString PanCancer 770 gene Panel) in the tumor from 20 patients with HGSOC before and after neoadjuvant chemotherapy (NACT). NGS was performed on plasma cell free DNA (cfDNA) on a select group of patients (n = 14) to assess the utility of using cfDNA to monitor these changes. A total of 86 genes had significant changes in RNA expression after NACT. Thirty-eight genetic variants (including SNPs) from 6 genes were identified in tumors pre-NACT, while 59 variants from 19 genes were detected in the cfDNA. The number of DNA variants were similar after NACT. Of the 59 variants in the plasma pre-NACT, only 6 persisted, whereas 33 of 38 specific variants in the tumor DNA remained unchanged. Pathway analysis showed the most significant alterations in the cell cycle and DNA damage pathways.Implications: Gene expression profiles at the time of interval debulking provide additional genetic information that could help impact treatment decisions after NACT; although, continued collection and analysis of matched tumor and cfDNA from multiple time points are needed to determine the role of cfDNA in the management of HGSOC. Mol Cancer Res; 16(5); 813-24. ©2018 AACR.
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Affiliation(s)
- Rebecca C Arend
- Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama.
| | - Angelina I Londoño
- Department of Radiation Oncology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Allison M Montgomery
- Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Haller J Smith
- Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Zachary C Dobbin
- Department of Obstetrics and Gynecology, University of Chicago, Chicago, Illinois
| | - Ashwini A Katre
- Department of Radiation Oncology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Alba Martinez
- Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Eddy S Yang
- Department of Radiation Oncology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Ronald D Alvarez
- Department of Obstetrics and Gynecology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Warner K Huh
- Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Kerri S Bevis
- Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
| | - J Michael Straughn
- Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Jacob M Estes
- Department of Obstetrics and Gynecology, Ochsner Health System, New Orleans, Louisiana
| | - Lea Novak
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama
| | - David K Crossman
- Department of Genetics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Sara J Cooper
- HudsonAlpha Institute for Biotechnology, Huntsville, Alabama
| | - Charles N Landen
- Department of Obstetrics and Gynecology, University of Virginia, Charlottesville, Virginia
| | - Charles A Leath
- Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
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21
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Baalmann CG, Galgano SJ, Pietryga JA, Novak L, Robbin ML. A Case of a Chorionic Bump: New Sonographic-Histopathologic Findings With Review of the Literature. J Ultrasound Med 2017; 36:1968-1970. [PMID: 28503780 DOI: 10.1002/jum.14240] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
| | - Samuel J Galgano
- Department of Radiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Jason A Pietryga
- Department of Radiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Lea Novak
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Michelle L Robbin
- Department of Radiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
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22
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Toboni MD, Smith HJ, Dilley SE, Novak L, Leath CA. Malignant Brenner tumor associated with a germline BRCA2 mutation. Gynecol Oncol Rep 2017; 21:17-19. [PMID: 28616458 PMCID: PMC5458647 DOI: 10.1016/j.gore.2017.05.006] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 05/22/2017] [Accepted: 05/29/2017] [Indexed: 11/18/2022] Open
Abstract
•The first woman with a Malignant Brenner tumor and a BRCA2 mutation is described.•Not all women with epithelial ovarian cancers are referred for genetic counseling.•Women should be referred for genetics regardless of how rare the histology.
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Affiliation(s)
- Michael D. Toboni
- University of Alabama at Birmingham, Department of Obstetrics & Gynecology, United States
| | - Haller J. Smith
- University of Alabama at Birmingham, Division of Gynecologic Oncology, United States
| | - Sarah E. Dilley
- University of Alabama at Birmingham, Division of Gynecologic Oncology, United States
| | - Lea Novak
- University of Alabama at Birmingham, Department of Pathology, United States
| | - Charles A. Leath
- University of Alabama at Birmingham, Division of Gynecologic Oncology, United States
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Thomas E, Hoepfner L, Schointuch M, Miller K, Straughn J, Leath C, Conner M, Novak L, Boone J, Kim K. Correlation between frozen section and final pathology in women with suspected gynecologic malignancies. Gynecol Oncol 2017. [DOI: 10.1016/j.ygyno.2017.03.311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Walker MM, Novak L, Widener R, Grubbs JA, King J, Hale JY, Ochs MM, Myers LE, Briles DE, Deshane J. PcpA Promotes Higher Levels of Infection and Modulates Recruitment of Myeloid-Derived Suppressor Cells during Pneumococcal Pneumonia. J Immunol 2016; 196:2239-48. [PMID: 26829988 DOI: 10.4049/jimmunol.1402518] [Citation(s) in RCA: 6] [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: 10/02/2014] [Accepted: 12/30/2015] [Indexed: 12/16/2022]
Abstract
We used two different infection models to investigate the kinetics of the PcpA-dependent pneumococcal disease in mice. In a bacteremic pneumonia model, we observed a PcpA-dependent increase in bacterial burden in the lungs, blood, liver, bronchoalveolar lavage, and spleens of mice at 24 h postinfection. This PcpA-dependent effect on bacterial burden appeared earlier (within 12 h) in the focal pneumonia model, which lacks bacteremia or sepsis. Histological changes show that the ability of pneumococci to make PcpA was associated with unresolved inflammation in both models of infection. Using our bacteremic pneumonia model we further investigated the effects of PcpA on recruitment of innate immune regulatory cells. The presence of PcpA was associated with increased IL-6 levels, suppressed production of TRAIL, and reduced infiltration of polymorphonuclear cells. The ability of pneumococci to make PcpA negatively modulated both the infiltration and apoptosis of macrophages and the recruitment of myeloid-derived suppressor-like cells. The latter have been shown to facilitate the clearance and control of bacterial pneumonia. Taken together, the ability to make PcpA was strongly associated with increased bacterial burden, inflammation, and negative regulation of innate immune cell recruitment to the lung tissue during bacteremic pneumonia.
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Affiliation(s)
- Melissa M Walker
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Lea Novak
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Rebecca Widener
- Department of Pediatrics, University of South Carolina School of Medicine, Columbia, SC 29203
| | - James Aaron Grubbs
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Janice King
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Joanetha Y Hale
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Martina M Ochs
- Sanofi Pasteur, Non-Clinical Product Performance, 69280 Marcy L'Etoile, France
| | - Lisa E Myers
- Sanofi Pasteur, Non-Clinical Product Performance, 69280 Marcy L'Etoile, France
| | - David E Briles
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294; Department of Genetics, University of Alabama at Birmingham, Birmingham, AL 35294; Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL 35294; and
| | - Jessy Deshane
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294; Division of Pulmonary, Allergy and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, AL 35294
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Dennis EA, Coats MT, Griffin SE, Hale JY, Novak L, Briles DE, Crain MJ. The Effects of CFTR and Mucoid Phenotype on Susceptibility and Innate Immune Responses in a Mouse Model of Pneumococcal Lung Disease. PLoS One 2015; 10:e0140335. [PMID: 26469863 PMCID: PMC4607445 DOI: 10.1371/journal.pone.0140335] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 09/24/2015] [Indexed: 12/18/2022] Open
Abstract
Recent studies have reported the isolation of highly mucoid serotype 3 Streptococcus pneumoniae (Sp) from the respiratory tracts of children with cystic fibrosis (CF). Whether these highly mucoid Sp contribute to, or are associated with, respiratory failure among patients with CF remains unknown. Other mucoid bacteria, predominately Pseudomonas aeruginosa, are associated with CF respiratory decline. We used a mouse model of CF to study pneumococcal pneumonia with highly mucoid serotype 3 and non-mucoid serotype 19A Sp isolates. We investigated susceptibility to infection, survival, and bacterial counts from bronchoaviolar lavage samples and lung homogenates, as well as associated inflammatory cytokines at the site of infection, and lung pathology. Congenic CFTR-/- mice and wild-type (WT)-mice were infected intranasally with CHB756, CHB1126, and WU2 (highly mucoid capsular serotype 3, intermediately mucoid serotype 3, and less mucoid serotype 3, respectively), or CHB1058 (non-mucoid serotype 19A). BAL, lung homogenates, and blood were collected from mice 5 days post-infection. Higher CFU recovery and shorter survival were observed following infection of CFTR-/- mice with CHB756 compared to infection with CHB1126, WU2, or CHB1058 (P≤0.001). Additionally, CFTR-/- mice infected with CHB756 and CHB1126 were more susceptible to infection than WT-mice (P≤0.05). Between CFTR-/- mice and WT-mice, no significant differences in TNF-α, CXCL1/KC concentrations, or lung histopathology were observed. Our results indicate that highly mucoid type 3 Sp causes more severe lung disease than non-mucoid Sp, and does so more readily in the lungs of CFTR-/- than WT-mice.
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Affiliation(s)
- Evida A. Dennis
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Mamie T. Coats
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Biological Sciences, Alabama State University, Montgomery, Alabama, United States of America
| | - Sarah E. Griffin
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Joanetha Y. Hale
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Lea Novak
- Department of Anatomic Pathology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - David E. Briles
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Marilyn J. Crain
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
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26
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Vassileva J, Rehani M, Kostova-Lefterova D, Al-Naemi HM, Al Suwaidi JS, Arandjic D, Bashier EHO, Kodlulovich Renha S, El-Nachef L, Aguilar JG, Gershan V, Gershkevitsh E, Gruppetta E, Hustuc A, Jauhari A, Kharita MH, Khelassi-Toutaoui N, Khosravi HR, Khoury H, Kralik I, Mahere S, Mazuoliene J, Mora P, Muhogora W, Muthuvelu P, Nikodemova D, Novak L, Pallewatte A, Pekarovič D, Shaaban M, Shelly E, Stepanyan K, Thelsy N, Visrutaratna P, Zaman A. A study to establish international diagnostic reference levels for paediatric computed tomography. Radiat Prot Dosimetry 2015; 165:70-80. [PMID: 25836685 DOI: 10.1093/rpd/ncv116] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The article reports results from the largest international dose survey in paediatric computed tomography (CT) in 32 countries and proposes international diagnostic reference levels (DRLs) in terms of computed tomography dose index (CTDI vol) and dose length product (DLP). It also assesses whether mean or median values of individual facilities should be used. A total of 6115 individual patient data were recorded among four age groups: <1 y, >1-5 y, >5-10 y and >10-15 y. CTDIw, CTDI vol and DLP from the CT console were recorded in dedicated forms together with patient data and technical parameters. Statistical analysis was performed, and international DRLs were established at rounded 75th percentile values of distribution of median values from all CT facilities. The study presents evidence in favour of using median rather than mean of patient dose indices as the representative of typical local dose in a facility, and for establishing DRLs as third quartile of median values. International DRLs were established for paediatric CT examinations for routine head, chest and abdomen in the four age groups. DRLs for CTDI vol are similar to the reference values from other published reports, with some differences for chest and abdomen CT. Higher variations were observed between DLP values, based on a survey of whole multi-phase exams. It may be noted that other studies in literature were based on single phase only. DRLs reported in this article can be used in countries without sufficient medical physics support to identify non-optimised practice. Recommendations to improve the accuracy and importance of future surveys are provided.
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Affiliation(s)
- J Vassileva
- International Atomic Energy Agency, Vienna, Austria
| | - M Rehani
- Harvard Medical School and Massachusetts General Hospital, Boston, USA
| | | | | | - J S Al Suwaidi
- Medical Education Department, Dubai Health Authority, Dubai, UAE
| | - D Arandjic
- Radiation Protection Department, Vinca Institute of Nuclear Sciences, Belgrade, Serbia
| | | | | | - L El-Nachef
- Lebanese Atomic Eneregy Commission, Beirut, Lebanon
| | - J G Aguilar
- National Institute for Nuclear Research, Carretera Mexico-Toluca, La Marquesa, Ocoyoacac, Mexico
| | - V Gershan
- Institute of Physics, Ss Cyril and Methodius University, Skopje, The former Yugoslav Republic of Macedonia
| | | | | | - A Hustuc
- National Centre of Public Health, Chisinau, Republic of Moldova
| | - A Jauhari
- Pusat Kajian Radiografi dan Imajing, Depok, Indonesia
| | | | - N Khelassi-Toutaoui
- Département de Physique Médicale, Centre de Recherche Nucléaire D'Alger, Algiers, Algiers
| | - H R Khosravi
- National Radiation Protection Department, Iranian Nuclear Regulatory Authority, Tehran, Iran
| | - H Khoury
- Universidade Federal de Pernambuco, Cidade Universitaria, Recife PE, Brazil
| | - I Kralik
- State Office for Radiological and Nuclear Safety, Zagreb, Croatia
| | - S Mahere
- Children Clinical University Hospital, Riga, Latvia
| | - J Mazuoliene
- Hospital of Lithuanian University of Health Science Kauno Klinikos, Kaunas, Lithuania
| | - P Mora
- Centro de Investigación en Ciencias Atómicas, Nucleares y Moleculares, Universidad de Costa Rica, San José, Costa Rica
| | - W Muhogora
- Tanzania Atomic Energy Commission, Arusha, Tanzania
| | - P Muthuvelu
- Ministry of Health Malaysia, Putrajaya Wilayah Persekutuan, Malaysia
| | - D Nikodemova
- Slovak Medical University, Limbova, Bratislava, Slovakia
| | - L Novak
- National Radiation Protection Institute, Prague, Czech Republic
| | - A Pallewatte
- Department of Radiology, The National Hospital of Sri Lanka, Colombo, Sri Lanka
| | - D Pekarovič
- Clinical Radiology Institute, University Medical Center, Ljubljana, Slovenia
| | - M Shaaban
- Al-Sabah Hospital, Kuwait City, Kuwait
| | - E Shelly
- Ministry of Health, Medical Technology and Infrastructure Administration, Jerusalem, Israel
| | - K Stepanyan
- Research Center of Radiation Medicine and Burns, Yerevan, Armenia
| | - N Thelsy
- Radiologist Ministry of Health, Yangon, Myanmar
| | - P Visrutaratna
- Faculty of Medicine, Department of Radiology, Chiang Mai University, Chiang Mai, Thailand
| | - A Zaman
- Institute of Nuclear Medicine and Oncology, PAEC, Lahore, Pakistan
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Novak J, Rizk D, Takahashi K, Zhang X, Bian Q, Ueda H, Ueda Y, Reily C, Lai LY, Hao C, Novak L, Huang ZQ, Renfrow MB, Suzuki H, Julian BA. New Insights into the Pathogenesis of IgA Nephropathy. Kidney Dis 2015; 1:8-18. [PMID: 26568951 DOI: 10.1159/000382134] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND IgA nephropathy, a frequent cause of end-stage renal disease, is an autoimmune disease wherein immune complexes consisting of IgA1 with galactose-deficient O-glycans (autoantigen) and anti-glycan autoantibodies deposit in glomeruli and induce renal injury. Multiple genetic loci associated with disease risk have been identified. The prevalence of risk alleles varies geographically, highest in eastern Asia and northern Europe, fewer in other parts of Europe and North America, and the least in Africa. IgA nephropathy is diagnosed from pathological assessment of a renal biopsy specimen. Currently, therapy is not disease-targeted but rather is focused on maintaining control of blood pressure and proteinuria, ideally with suppression of angiotensin II. Possible additional approaches differ between countries. Disease-specific therapy as well as new tools for diagnosis, prognosis, and assessment of responses to therapy are needed. SUMMARY Glycosylation pathways associated with aberrant O-glycosylation of IgA1 and, thus, production of autoantigen, have been identified. Furthermore, unique characteristics of the autoantibodies in IgA nephropathy have been uncovered. Many of these biochemical features are shared by patients with IgA nephropathy and Henoch-Schönlein purpura nephritis, suggesting that the two diseases may represent opposite ends of a spectrum of a disease process. Understanding the molecular mechanisms involved in formation of pathogenic IgA1-containing immune complexes will enable development of disease-specific therapies as well as diagnostic and prognostic biomarkers. KEY MESSAGES IgA nephropathy is an autoimmune disease caused by glomerular deposition of nephritogenic circulating immune complexes consisting of galactose-deficient IgA1 (autoantigen) bound by anti-glycan autoantibodies. A better understanding of the multi-step process of pathogenesis of IgA nephropathy and the genetic and environmental contributing factors will lead to development of biomarkers to identify patients with progressive disease who would benefit from a future disease-specific therapy.
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Affiliation(s)
- Jan Novak
- University of Alabama at Birmingham, Birmingham, AL, USA
| | - Dana Rizk
- University of Alabama at Birmingham, Birmingham, AL, USA
| | - Kazuo Takahashi
- University of Alabama at Birmingham, Birmingham, AL, USA ; School of Medicine, Fujita Health University, Toyoake, Japan
| | - XianWen Zhang
- University of Alabama at Birmingham, Birmingham, AL, USA ; Longhua Hospital, Shanghai University of TCM, Shanghai, China
| | - Qi Bian
- University of Alabama at Birmingham, Birmingham, AL, USA ; Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Hirouki Ueda
- University of Alabama at Birmingham, Birmingham, AL, USA
| | - Yoshimi Ueda
- University of Alabama at Birmingham, Birmingham, AL, USA
| | - Colin Reily
- University of Alabama at Birmingham, Birmingham, AL, USA
| | - Ling-Yun Lai
- University of Alabama at Birmingham, Birmingham, AL, USA ; Fudan University Huashan Hospital, Shanghai, China
| | | | - Lea Novak
- University of Alabama at Birmingham, Birmingham, AL, USA
| | | | | | - Hitoshi Suzuki
- University of Alabama at Birmingham, Birmingham, AL, USA ; Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Bruce A Julian
- University of Alabama at Birmingham, Birmingham, AL, USA
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28
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Smith PD, Shimamura M, Musgrove LC, Dennis EA, Bimczok D, Novak L, Ballestas M, Fenton A, Dandekar S, Britt WJ, Smythies LE. Cytomegalovirus enhances macrophage TLR expression and MyD88-mediated signal transduction to potentiate inducible inflammatory responses. J Immunol 2014; 193:5604-12. [PMID: 25355920 DOI: 10.4049/jimmunol.1302608] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Circulating monocytes carrying human CMV (HCMV) migrate into tissues, where they differentiate into HCMV-infected resident macrophages that upon interaction with bacterial products may potentiate tissue inflammation. In this study, we investigated the mechanism by which HCMV promotes macrophage-orchestrated inflammation using a clinical isolate of HCMV (TR) and macrophages derived from primary human monocytes. HCMV infection of the macrophages, which was associated with viral DNA replication, significantly enhanced TNF-α, IL-6, and IL-8 gene expression and protein production in response to TLR4 ligand (LPS) stimulation compared with mock-infected LPS-stimulated macrophages during a 6-d in vitro infection. HCMV infection also potentiated TLR5 ligand-stimulated cytokine production. To elucidate the mechanism by which HCMV infection potentiated inducible macrophage responses, we show that infection by HCMV promoted the maintenance of surface CD14 and TLR4 and TLR5, which declined over time in mock-infected macrophages, and enhanced both the intracellular expression of adaptor protein MyD88 and the inducible phosphorylation of IκBα and NF-κB. These findings provide additional information toward elucidating the mechanism by which HCMV potentiates bacteria-induced NF-κB-mediated macrophage inflammatory responses, thereby enhancing organ inflammation in HCMV-infected tissues.
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Affiliation(s)
- Phillip D Smith
- Division of Gastroenterology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294; Veterans Affairs Medical Center, Birmingham, AL 35233;
| | - Masako Shimamura
- Division of Infectious Diseases, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Lois C Musgrove
- Division of Gastroenterology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Evida A Dennis
- Division of Gastroenterology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294; Division of Infectious Diseases, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Diane Bimczok
- Division of Gastroenterology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Lea Novak
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294; and
| | - Mary Ballestas
- Division of Infectious Diseases, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Anne Fenton
- Department of Medical Microbiology and Immunology, University of California, Davis, Davis, CA 95616
| | - Satya Dandekar
- Department of Medical Microbiology and Immunology, University of California, Davis, Davis, CA 95616
| | - William J Britt
- Division of Infectious Diseases, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Lesley E Smythies
- Division of Gastroenterology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294; Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294; and
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29
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Agnese R, Anderson AJ, Asai M, Balakishiyeva D, Basu Thakur R, Bauer DA, Beaty J, Billard J, Borgland A, Bowles MA, Brandt D, Brink PL, Bunker R, Cabrera B, Caldwell DO, Cerdeno DG, Chagani H, Chen Y, Cherry M, Cooley J, Cornell B, Crewdson CH, Cushman P, Daal M, DeVaney D, Di Stefano PCF, Silva EDCE, Doughty T, Esteban L, Fallows S, Figueroa-Feliciano E, Godfrey GL, Golwala SR, Hall J, Hansen S, Harris HR, Hertel SA, Hines BA, Hofer T, Holmgren D, Hsu L, Huber ME, Jastram A, Kamaev O, Kara B, Kelsey MH, Kenany S, Kennedy A, Kiveni M, Koch K, Leder A, Loer B, Lopez Asamar E, Mahapatra R, Mandic V, Martinez C, McCarthy KA, Mirabolfathi N, Moffatt RA, Nelson RH, Novak L, Page K, Partridge R, Pepin M, Phipps A, Platt M, Prasad K, Pyle M, Qiu H, Rau W, Redl P, Reisetter A, Resch RW, Ricci Y, Ruschman M, Saab T, Sadoulet B, Sander J, Schmitt RL, Schneck K, Schnee RW, Scorza S, Seitz DN, Serfass B, Shank B, Speller D, Tomada A, Upadhyayula S, Villano AN, Welliver B, Wright DH, Yellin S, Yen JJ, Young BA, Zhang J. Search for low-mass weakly interacting massive particles with SuperCDMS. Phys Rev Lett 2014; 112:241302. [PMID: 24996080 DOI: 10.1103/physrevlett.112.241302] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Indexed: 06/03/2023]
Abstract
We report a first search for weakly interacting massive particles (WIMPs) using the background rejection capabilities of SuperCDMS. An exposure of 577 kg days was analyzed for WIMPs with mass <30 GeV/c(2), with the signal region blinded. Eleven events were observed after unblinding. We set an upper limit on the spin-independent WIMP-nucleon cross section of 1.2×10(-42) cm(2) at 8 GeV/c(2). This result is in tension with WIMP interpretations of recent experiments and probes new parameter space for WIMP-nucleon scattering for WIMP masses <6 GeV/c(2).
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Affiliation(s)
- R Agnese
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - A J Anderson
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - M Asai
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - D Balakishiyeva
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - R Basu Thakur
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA and Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - D A Bauer
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - J Beaty
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - J Billard
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Borgland
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M A Bowles
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - D Brandt
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - P L Brink
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - R Bunker
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - B Cabrera
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D O Caldwell
- Department of Physics, University of California, Santa Barbara, California 93106, USA
| | - D G Cerdeno
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - H Chagani
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Y Chen
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - M Cherry
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - J Cooley
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - B Cornell
- Division of Physics, Mathematics, & Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - C H Crewdson
- Department of Physics, Queen's University, Kingston, Ontario K7 L 3N6, Canada
| | - P Cushman
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Daal
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - D DeVaney
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - P C F Di Stefano
- Department of Physics, Queen's University, Kingston, Ontario K7 L 3N6, Canada
| | - E Do Couto E Silva
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - T Doughty
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - L Esteban
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - S Fallows
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Figueroa-Feliciano
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - G L Godfrey
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S R Golwala
- Division of Physics, Mathematics, & Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - J Hall
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - S Hansen
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - H R Harris
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - S A Hertel
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - B A Hines
- Department of Physics, University of Colorado Denver, Denver, Colorado 80217, USA
| | - T Hofer
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - D Holmgren
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - L Hsu
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - M E Huber
- Department of Physics, University of Colorado Denver, Denver, Colorado 80217, USA
| | - A Jastram
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - O Kamaev
- Department of Physics, Queen's University, Kingston, Ontario K7 L 3N6, Canada
| | - B Kara
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - M H Kelsey
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S Kenany
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - A Kennedy
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Kiveni
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - K Koch
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - A Leder
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - B Loer
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - E Lopez Asamar
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - R Mahapatra
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - V Mandic
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - C Martinez
- Department of Physics, Queen's University, Kingston, Ontario K7 L 3N6, Canada
| | - K A McCarthy
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - N Mirabolfathi
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - R A Moffatt
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - R H Nelson
- Division of Physics, Mathematics, & Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - L Novak
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - K Page
- Department of Physics, Queen's University, Kingston, Ontario K7 L 3N6, Canada
| | - R Partridge
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M Pepin
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - A Phipps
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - M Platt
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - K Prasad
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - M Pyle
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - H Qiu
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - W Rau
- Department of Physics, Queen's University, Kingston, Ontario K7 L 3N6, Canada
| | - P Redl
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - A Reisetter
- Department of Physics, University of Evansville, Evansville, Indiana 47722, USA
| | - R W Resch
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Y Ricci
- Department of Physics, Queen's University, Kingston, Ontario K7 L 3N6, Canada
| | - M Ruschman
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - T Saab
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - B Sadoulet
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA and Department of Physics, University of California, Berkeley, California 94720, USA
| | - J Sander
- Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA
| | - R L Schmitt
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - K Schneck
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - R W Schnee
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - S Scorza
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - D N Seitz
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - B Serfass
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - B Shank
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D Speller
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - A Tomada
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S Upadhyayula
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - A N Villano
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - B Welliver
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - D H Wright
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S Yellin
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - J J Yen
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - B A Young
- Department of Physics, Santa Clara University, Santa Clara, California 95053, USA
| | - J Zhang
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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Libby EF, Azrad M, Novak L, Vazquez AI, Wilson TR, Demark-Wahnefried W. Obesity is associated with higher 4E-BP1 expression in endometrial cancer. ACTA ACUST UNITED AC 2014; 2014:1-7. [PMID: 24639918 PMCID: PMC3955094 DOI: 10.2147/cbf.s53530] [Citation(s) in RCA: 3] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
PURPOSE Obesity is associated with risk and prognosis of endometrial cancer (EC), and the mammalian target of rapamycin complex 1 (mTORC1) pathway may play an instrumental role. We sought to explore the associations between cellular proliferation, Akt, and 4E binding protein-1 (4E-BP1) (a downstream target of mTORC1), in obese and nonobese women with and without EC. METHODS Archival tissue-specimens from endometrial biopsies were grouped into two broad categories based on the observed disease behavior and similarities in tissue staining patterns: benign/hyperplasia (without cytologic atypia) (n=18) versus atypia (complex hyperplasia with cytologic atypia)/carcinoma (n=25). The characteristics of the study population, including height and weight to determine body mass index (BMI: kg/m2), were abstracted from medical records. Immunohistochemistry was used to assess the phosphorylated (p)Akt, p4E-BP1, and antigen Ki67. RESULTS Cytoplasmic and nuclear pAkt were significantly associated with cytoplasmic p4E-BP1 (ρ=+0.48, ρ=+0.50) (P<0.05) and nuclear p4E-BP1 (ρ=+0.40, ρ=+0.44) (P<0.05); cytoplasmic and nuclear p4E-BP1 were significantly associated with Ki67 (ρ=+0.46, ρ=+0.59) (P<0.05). Compared with the benign/hyperplasia group, the women with atypia/carcinoma had significantly higher cytoplasmic and nuclear p4E-BP1 and Ki67. This staining pattern was similar in obese women; however, in nonobese women, neither cytoplasmic nor nuclear p4E-BP1staining differed between benign/hyperplasia versus atypia/carcinoma. CONCLUSION The activation of 4E-BP1 was higher in the obese women with EC. Adiposity may be a key factor to consider in future studies investigating the role of 4E-BP1 as a biomarker and therapeutic target in EC.
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Affiliation(s)
- Emily Falk Libby
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Maria Azrad
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Lea Novak
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Ana I Vazquez
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Tamara R Wilson
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL, USA
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Cui X, Peker D, Novak L, Conner M. Leiomyoma With Extramedullary Hematopoiesis and Intravascular Thrombosis. Am J Clin Pathol 2013. [DOI: 10.1093/ajcp/140.suppl1.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Zabolotskii VI, Pis’menskii VF, Demina OA, Novak L. Effect of concentration polarization on electrodialytic concentrating of dilute NaCl and NH4NO3 solutions. RUSS J ELECTROCHEM+ 2013. [DOI: 10.1134/s1023193513060153] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Trianni A, Farah J, Carinou E, Clairand I, Dabin J, Deangelis C, Domienik J, Knezevic Z, Kopec R, Malchair F, Negri A, Novak L, Siiskonen T, Vanhavere F. TU-A-116-11: Maximum Patient Skin Dose From Interventional Radiology Procedures and Definition of Alert Thresholds. Med Phys 2013. [DOI: 10.1118/1.4815358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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34
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Farah J, Trianni A, Carinou E, Dabin J, Deangelis C, Domienik J, Knezevic Z, Kopec R, Malchair F, Negri A, Novak L, Siiskonen T, Vanhavere F, Clairand I. SU-E-I-28: Assessment of Maximum Patient Skin Dose for Interventional Radiology Procedures: Method and Uncertainty Analysis. Med Phys 2013. [DOI: 10.1118/1.4814138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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35
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Libby EF, Azrad M, Novak L, Demark-Wahnefried W. Abstract 151: Obesity is independently associated with mTORC1 pathway activation in the progression of endometrial cancer. Cancer Res 2013. [DOI: 10.1158/1538-7445.am2013-151] [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] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Obesity is a major risk factor for endometrial cancer (EC) yet, with the exception of estrogen, the mechanisms underlying this association remain unclear. The mammalian target of rapamycin complex 1 (mTORC1) cascade links energy balance to cell proliferation via the PI3K/Akt pathway. Phosphorylation of Akt by hormone and growth factor signaling activates mTORC1 and results in the downstream phosphorylation of 4EBP1. Activated 4EBP1 positively regulates cap-dependent translation and cell growth, and correlates with EC progression. Thus, we explored the associations between obesity and pAkt and p4EBP1 expression, and cell proliferation rates (Ki67) in benign and malignant endometrial tissues.
Methods: Medical records were reviewed to identify women who underwent endometrial biopsy at UAB Hospital from 2008-2010. Women who had recurrent EC or diagnoses of any other cancer were excluded. Data on diagnosis, height, weight, race, age, menopausal status, number of children, medications, and comorbid conditions were extracted from medical records. Height and weight were used to calculate body mass index (BMI: kg/m2). A gynecologic pathologist reviewed H&E slides for concordance with the pathology report, and additional sections were obtained from formalin-fixed paraffin-embedded tissue blocks. Immunohistochemistry was used to assess p4EBP1, pAkt, and Ki67. The pathologist employed a semiquantitative scoring system based on percent positive and staining intensity for p4EBP1 and pAkt, and scored on percent positive for Ki67. Wilcoxon rank-sum tests were used to compare marker activity between women with and without EC in the overall and BMI-stratified sample.
Results: Immunohistochemical data were available for 18 benign and 25 type 1 endometrioid EC cases, of which 29 were obese (BMI > 29.9) and 14 were non-obese (BMI ≤ 29.9); the overall mean BMI was 35.5 (SD=11.6). Mean age was 56.7 (12.2). Women with vs. without EC had significantly elevated median [interquartile range] expression of cytoplasmic p4EBP1 (95 [30-180] vs. 0 [0-20], p=0.001), nuclear p4EBP1 (170 [95-195] vs. 70 [20-100], p=0.003), and Ki67 (50 [40-80] vs. 10 [5-20], p<0.0001). EC was not associated with pAKT activity. While obese women with vs. without EC had significantly higher expression of cytoplasmic p4EBP1 (100 [80-180] vs. 0 [0-10], p=0.002) and nuclear p4EBP1 (180 [100-200] vs. 65 [20-100], p=0.002), neither cytoplasmic nor nuclear p4EBP1 activity differed by EC status among non-obese women. No associations between obesity and Ki67 or pAKT were detected.
Conclusions: Results from this exploratory study suggest that p4EBP1 expression is elevated in obese women with EC. These preliminary findings suggest that obesity may play a role in EC-related activation of the mTORC1 pathway and 4EBP1, a biomarker for EC outcomes.
Citation Format: Emily Falk Libby, Maria Azrad, Lea Novak, Wendy Demark-Wahnefried. Obesity is independently associated with mTORC1 pathway activation in the progression of endometrial cancer. [abstract]. In: Proceedings of the 104th Annual Meeting of the American Association for Cancer Research; 2013 Apr 6-10; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2013;73(8 Suppl):Abstract nr 151. doi:10.1158/1538-7445.AM2013-151
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Affiliation(s)
| | - Maria Azrad
- University of Alabama at Birmingham, Birmingham, AL
| | - Lea Novak
- University of Alabama at Birmingham, Birmingham, AL
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Mestecky J, Raska M, Julian BA, Gharavi AG, Renfrow MB, Moldoveanu Z, Novak L, Matousovic K, Novak J. IgA nephropathy: molecular mechanisms of the disease. Annu Rev Pathol 2012; 8:217-40. [PMID: 23092188 DOI: 10.1146/annurev-pathol-011110-130216] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Studies of molecular and cellular interactions involved in the pathogenesis of IgA nephropathy have revealed the autoimmune nature of this most common primary glomerulonephritis. In patients with this disease, altered glycan structures in the unique hinge region of the heavy chains of IgA1 molecules lead to the exposure of antigenic determinants, which are recognized by naturally occurring antiglycan antibodies of the IgG and/or IgA1 isotype. As a result, nephritogenic immune complexes form in the circulation and deposit in the glomerular mesangium. Deposited immune complexes induce proliferation of resident mesangial cells, increased production of extracellular matrix proteins and cytokines, and ultimately loss of glomerular function. Structural elucidation of the nature of these immune complexes and their biological activity should provide a rational basis for an effective, immunologically mediated inhibition of the formation of nephritogenic immune complexes that could be used as a disease-specific therapeutic approach.
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Affiliation(s)
- Jiri Mestecky
- Department of Microbiology, University of Alabama at Birmingham, AL 35294, USA
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37
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McCarthy DD, Kujawa J, Wilson C, Papandile A, Poreci U, Porfilio EA, Ward L, Lawson MA, Macpherson AJ, McCoy KD, Pei Y, Novak L, Lee JY, Julian BA, Novak J, Ranger A, Gommerman JL, Browning JL. Mice overexpressing BAFF develop a commensal flora–dependent, IgA-associated nephropathy. J Clin Invest 2012. [DOI: 10.1172/jci62188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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38
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Sukupova L, Novak L, Kala P, Cervinka P, Stasek J. Patient skin dosimetry in interventional cardiology in the Czech Republic. Radiat Prot Dosimetry 2011; 147:106-110. [PMID: 21757443 DOI: 10.1093/rpd/ncr284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this study, skin dosimetry of patients undergoing interventional cardiology procedures is presented. Three hospitals were included. Two methods were used for skin dosimetry--radiochromic dosimetry films and reconstruction of skin dose distribution based on examination protocol. Maximum skin doses (MSD) obtained from both methods were compared for 175 patients. For patients for whom the film MSD was >1 Gy, the reconstruction MSD differed from the film MSD in the range of ± 50 % for 83 % of patients. For remaining patients, the difference was higher and it was caused by longer fluoroscopy time. For 59 patients for whom the cumulative dose was known, the cumulative dose was compared with the film MSD. Skin dosimetry with radiochromic films is more accurate than the reconstruction method, but films do not include X-ray fields from lateral projections whilest reconstructions do.
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Affiliation(s)
- L Sukupova
- National Radiation Protection Institute, Bartoskova 28, 140 00 Prague 4, Czech Republic.
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McCarthy DD, Kujawa J, Wilson C, Papandile A, Poreci U, Porfilio EA, Ward L, Lawson MAE, Macpherson AJ, McCoy KD, Pei Y, Novak L, Lee JY, Julian BA, Novak J, Ranger A, Gommerman JL, Browning JL. Mice overexpressing BAFF develop a commensal flora-dependent, IgA-associated nephropathy. J Clin Invest 2011; 121:3991-4002. [PMID: 21881212 DOI: 10.1172/jci45563] [Citation(s) in RCA: 177] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Accepted: 07/13/2011] [Indexed: 12/19/2022] Open
Abstract
B cell activation factor of the TNF family (BAFF) is a potent B cell survival factor. BAFF overexpressing transgenic mice (BAFF-Tg mice) exhibit features of autoimmune disease, including B cell hyperplasia and hypergammaglobulinemia, and develop fatal nephritis with age. However, basal serum IgA levels are also elevated, suggesting that the pathology in these mice may be more complex than initially appreciated. Consistent with this, we demonstrate here that BAFF-Tg mice have mesangial deposits of IgA along with high circulating levels of polymeric IgA that is aberrantly glycosylated. Renal disease in BAFF-Tg mice was associated with IgA, because serum IgA was highly elevated in nephritic mice and BAFF-Tg mice with genetic deletion of IgA exhibited less renal pathology. The presence of commensal flora was essential for the elevated serum IgA phenotype, and, unexpectedly, commensal bacteria-reactive IgA antibodies were found in the blood. These data illustrate how excess B cell survival signaling perturbs the normal balance with the microbiota, leading to a breach in the normal mucosal-peripheral compartmentalization. Such breaches may predispose the nonmucosal system to certain immune diseases. Indeed, we found that a subset of patients with IgA nephropathy had elevated serum levels of a proliferation inducing ligand (APRIL), a cytokine related to BAFF. These parallels between BAFF-Tg mice and human IgA nephropathy may provide a new framework to explore connections between mucosal environments and renal pathology.
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Affiliation(s)
- Douglas D McCarthy
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
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Dufek V, Horakova I, Novak L. Organ and effective doses from verification techniques in image-guided radiotherapy. Radiat Prot Dosimetry 2011; 147:277-280. [PMID: 21816726 DOI: 10.1093/rpd/ncr335] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The purpose of this work was an evaluation of organ doses and effective doses from three verification techniques in Image-Guided Radiotherapy: from kilovoltage (kV) cone beam computed tomography (CBCT) scans, from two orthogonal kV images and from two orthogonal megavoltage (MV) images for two different treatment sites: pelvis and head and neck (H&N). For comparison reasons, organ doses and effective doses from prostate and H&N radiotherapy were also evaluated. Measurements of organ doses were performed in a male anthropomorphic Rando phantom by means of thermoluminescent dosemeters. In this investigation, measured organ doses from one CBCT scan, from two MV images and from two kV images of pelvis represent typically 1-6, 1-10 and 0.05-1 %, respectively, of organ doses resulting from one fraction of prostate radiotherapy. The maximum effective doses from CBCT scans, kV images and MV images of pelvis are 5.6, 0.8 and 11.9 mSv, respectively.
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Affiliation(s)
- V Dufek
- National Radiation Protection Institute, Bartoskova 28, 14000 Prague, Czech Republic.
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41
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Novak J, Raskova Kafkova L, Suzuki H, Tomana M, Matousovic K, Brown R, Hall S, Sanders JT, Eison TM, Moldoveanu Z, Novak L, Novak Z, Mayne R, Julian BA, Mestecky J, Wyatt RJ. IgA1 immune complexes from pediatric patients with IgA nephropathy activate cultured human mesangial cells. Nephrol Dial Transplant 2011; 26:3451-7. [PMID: 21828345 DOI: 10.1093/ndt/gfr448] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Circulating immune complexes (CIC) containing galactose (Gal)-deficient IgA1 from adults with IgA nephropathy (IgAN) induce proliferation of cultured mesangial cells, but activities of CIC from pediatric patients with the disease have not been studied. METHODS CIC of different sizes were isolated from sera of pediatric and adult IgAN patients and their effects on cultured human mesangial cells (MC) were assessed by measuring cellular proliferation, expression of IL-6 and IL-8 and laminin and phosphotyrosine signaling. RESULTS Large CIC from pediatric IgAN patients (>800 kDa) containing Gal-deficient IgA1 stimulated cellular proliferation, whereas in some patients, smaller CIC were inhibitory. Addition of stimulatory and inhibitory CIC to MC differentially altered phosphorylation patterns of three major tyrosine-phosphorylated proteins of molecular mass 37, 60 and 115 kDa. The stimulatory CIC transiently increased tyrosine-phosphorylation of the 37-kDa protein and decreased phosphorylation of the other two proteins, whereas the inhibitory CIC increased phosphorylation of all three proteins. Furthermore, we investigated the influence of IgA1-containing CIC from sera of children with IgAN with clinically active disease (i.e., abnormal urinalysis and/or serum creatinine concentration) or inactive disease (i.e., normal urinalysis and serum creatinine concentration) on the expression of IL-6 and IL-8 genes by mesangial cells. Real-time reverse transcription-polymerase chain reaction results showed that the CIC from a patient with active disease stimulated MC to express the two cytokine genes at higher levels than did the CIC from a patient with inactive disease. Moreover, stimulatory CIC increased production of the extracellular matrix protein laminin. CONCLUSION These data indicate that sera of pediatric IgAN patients contain biologically active CIC with Gal-deficient IgA1.
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Affiliation(s)
- Jan Novak
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, USA.
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Mangieri D, Palmisano A, Libri I, Corradi D, Carnevali ML, Buzio C, Vaglio A, Zikou X, Rousouli K, Tellis C, Tselepis A, Siamopoulos K, Zawada AM, Rogacev KS, Rotter B, Winter P, Marell RR, Fliser D, Heine GH, Fligny C, Milon M, Huang J, Schordan S, Mesnard L, Endlich N, Tharaux PL, Yurkevich M, Komissarov K, Pilotovich V, Zafranskaya M, Smykal-Jankowiak K, Niemir Z, Polcyn-Adamczak M, Szramka-Pawlak B, Zaba R, Wornle M, Ribeiro A, Merkle M, Hiemstra TF, Charles PD, Hester SS, Al-Lamki R, Su Y, Robinson C, Floto RA, Lilley KS, Karet FE, Wu CC, Lu KC, Chen JS, Lin YF, Sytwu HK, Esposito P, Gabanti E, Bianzina S, Rampino T, Dal Canton A, Hung KY, Lang CL, Lu KC, Liu SY, Rakityanskaya I, Ryabova T, Novak J, Suzuki H, Yamada K, Moldoveanu Z, Takahashi K, Horynova M, Novakova J, Julian BA, Novak L, Poulsen K, Kilian M, Gharavi AG, Renfrow MB, Mestecky J, Raska M, Camilla R, Loiacono E, Dapra V, Morando L, Peruzzi L, Conrieri M, Bianciotto M, Bosetti FM, Gallo R, Amore A, Coppo R, Ito S, Higuchi Y, Nishijima F, Yamato H, Ishii H, Yoshida M, Na KY, Oh SW, Chin HJ, Chae DW, Oh YK, Joo KW, Han JS, Mazanowska O, Kaminska D, Krajewska M, Zabinska M, Kopec W, Boratynska M, Klinger M, Wornle M, Merkle M, Ribeiro A, Cohen G, Raupachova J, Borchhardt K, Horl WH, Pletinck A, Glorieux G, Schepers E, Van Landschoot M, Van De Voorde J, Van Biesen W, Vanholder R, Bansal V, Davis R, Litinas E, Hoppensteadt D, Fareed J, Abdgawad M, Gunnarsson L, Segelmark M, Hellmark T, Izuka I, Quinto B, Goes M, Monte J, Pavao O, Santos B, Pereira V, Dalboni M, Cendoroglo M, Batista M, Quinto B, Goes M, Izuka I, Monte J, Durao M, Pavao O, Pereira V, Dalboni M, Cendoroglo M, Batista M, Lai CF, Lin SL, Chen YM, Chiang WC, Wu KD, Kuo ML, Tsai TJ. Immune and inflammatory mechanisms. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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43
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Greer HO, Frederick PJ, Falls NM, Tapley EB, Samples KL, Kimball KJ, Kendrick JE, Conner MG, Novak L, Straughn JM. Impact of a weekly multidisciplinary tumor board conference on the management of women with gynecologic malignancies. Int J Gynecol Cancer 2011; 20:1321-5. [PMID: 21051971 DOI: 10.1111/igc.0b013e3181f5871e] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND The objective of this study was to evaluate the impact of a weekly tumor board conference on the management of patients with gynecologic malignancies. METHODS The medical records of consecutive patients referred to a multidisciplinary gynecologic oncology tumor board were reviewed. Patient demographics were abstracted from medical records and tumor board minutes. An evaluation was made whether the pathological or radiological findings were changed by the tumor board consultants. If a discrepancy existed, it was determined whether the change impacted clinical management. RESULTS From January 2004 to December 2006, 741 patients presented at the tumor board were evaluable. Seventy-one percent of the patients were presented for pathology review and 29% for radiology review. The most common diagnoses were ovarian cancer (29%), endometrial cancer (26%), and cervical cancer (12%). Of the 526 pathology reviews, 27% had a change in diagnosis; this discrepancy altered clinical management 74% of the time (20% of all reviews). Of the 215 radiology presentations, 89% were reviewed to confirm recurrent or persistent disease; malignant disease was confirmed 74% of the time. Review of imaging studies resulted in a new diagnosis or upstaging 10% of the time. CONCLUSIONS A multidisciplinary tumor board allows a wide range of gynecologic diagnoses and clinical scenarios to be discussed. Careful review of pathology results in a change in the clinical management of 20% of patients presented at the tumor board. The majority of radiology reviews are presented to confirm persistent or recurrent cancer before recommending further therapy.
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Affiliation(s)
- Heather O Greer
- Department of Obstetrics and Gynecology, University of Alabama at Birmingham, 619 19th Street S., Birmingham, AL 35249, USA
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Smythies LE, Shen R, Bimczok D, Novak L, Clements RH, Eckhoff DE, Bouchard P, George MD, Hu WK, Dandekar S, Smith PD. Inflammation anergy in human intestinal macrophages is due to Smad-induced IkappaBalpha expression and NF-kappaB inactivation. J Biol Chem 2010; 285:19593-604. [PMID: 20388715 PMCID: PMC2885238 DOI: 10.1074/jbc.m109.069955] [Citation(s) in RCA: 148] [Impact Index Per Article: 10.6] [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: 09/25/2009] [Revised: 03/15/2010] [Indexed: 12/13/2022] Open
Abstract
Human intestinal macrophages contribute to tissue homeostasis in noninflamed mucosa through profound down-regulation of pro-inflammatory cytokine release. Here, we show that this down-regulation extends to Toll-like receptor (TLR)-induced cytokine release, as intestinal macrophages expressed TLR3-TLR9 but did not release cytokines in response to TLR-specific ligands. Likely contributing to this unique functional profile, intestinal macrophages expressed markedly down-regulated adapter proteins MyD88 and Toll interleukin receptor 1 domain-containing adapter-inducing interferon beta, which together mediate all TLR MyD88-dependent and -independent NF-kappaB signaling, did not phosphorylate NF-kappaB p65 or Smad-induced IkappaBalpha, and did not translocate NF-kappaB into the nucleus. Importantly, transforming growth factor-beta released from intestinal extracellular matrix (stroma) induced identical down-regulation in the NF-kappaB signaling and function of blood monocytes, the exclusive source of intestinal macrophages. Our findings implicate stromal transforming growth factor-beta-induced dysregulation of NF-kappaB proteins and Smad signaling in the differentiation of pro-inflammatory blood monocytes into noninflammatory intestinal macrophages.
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Affiliation(s)
| | - Ruizhong Shen
- From the Departments of Medicine (Gastroenterology) and
| | - Diane Bimczok
- From the Departments of Medicine (Gastroenterology) and
| | | | | | - Devin E. Eckhoff
- Transplantation, University of Alabama at Birmingham, Birmingham, Alabama 35294
| | | | - Michael D. George
- the Department of Medical Microbiology, University of California School of Medicine, Davis, California 95616, and
| | - William K. Hu
- the Department of Medical Microbiology, University of California School of Medicine, Davis, California 95616, and
| | - Satya Dandekar
- the Department of Medical Microbiology, University of California School of Medicine, Davis, California 95616, and
| | - Phillip D. Smith
- From the Departments of Medicine (Gastroenterology) and
- the Veterans Affairs Medical Center, Birmingham, Alabama 35233
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Abstract
To dissect the early events in the transmission of HIV-1 from mother to child, we investigated whether DCs participate in HIV-1 entry into human small intestinal mucosa. We isolated human MNLs from jejunal lamina propria and identified a subpopulation of CD11c(+)HLA-DR(+) MNLs that expressed DC-SIGN, CD83, CD86, CD206, and CCR7, indicating a DC phenotype. Jejunal DCs also expressed the HIV-1 receptor CD4 and coreceptors CCR5 and CXCR4 and in suspension rapidly took up cell-free HIV-1. HIV-1 inoculated onto the apical surface of explanted jejunum was transported by lamina propria DCs through the mucosa and transmitted in trans to blood and intestinal lymphocytes. These findings indicate that in addition to intestinal epithelial cells, which we showed previously transcytose infectious HIV-1 to indicator cells, intestinal DCs play an important role in transporting HIV-1 through the intestinal mucosa and the subsequent transmission to T cells.
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Affiliation(s)
- Ruizhong Shen
- Departmentsof Medicine (Gastroenterology), University of Alabama at Birmingham, Birmingham, AL 35294-2182, USA
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Shen R, Richter HE, Clements RH, Novak L, Huff K, Bimczok D, Sankaran-Walters S, Dandekar S, Clapham PR, Smythies LE, Smith PD. Macrophages in vaginal but not intestinal mucosa are monocyte-like and permissive to human immunodeficiency virus type 1 infection. J Virol 2009; 83:3258-67. [PMID: 19153236 PMCID: PMC2655566 DOI: 10.1128/jvi.01796-08] [Citation(s) in RCA: 146] [Impact Index Per Article: 9.7] [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: 08/27/2008] [Accepted: 01/06/2009] [Indexed: 12/11/2022] Open
Abstract
Mucosal surfaces play a major role in human immunodeficiency virus type 1 (HIV-1) transmission and pathogenesis, and yet the role of lamina propria macrophages in mucosal HIV-1 infection has received little investigative attention. We report here that vaginal and intestinal macrophages display distinct phenotype and HIV-1 permissiveness profiles. Vaginal macrophages expressed the innate response receptors CD14, CD89, CD16, CD32, and CD64 and the HIV-1 receptor/coreceptors CD4, CCR5, and CXCR4, similar to monocytes. Consistent with this phenotype, green fluorescent protein-tagged R5 HIV-1 entered macrophages in explanted vaginal mucosa as early as 30 min after inoculation of virus onto the epithelium, and purified vaginal macrophages supported substantial levels of HIV-1 replication by a panel of highly macrophage-tropic R5 viruses. In sharp contrast, intestinal macrophages expressed no detectable, or very low levels of, innate response receptors and HIV-1 receptor/coreceptors and did not support HIV-1 replication, although virus occasionally entered macrophages in intestinal tissue explants. Thus, vaginal, but not intestinal, macrophages are monocyte-like and permissive to R5 HIV-1 after the virus has translocated across the epithelium. These findings suggest that genital and gut macrophages have different roles in mucosal HIV-1 pathogenesis and that vaginal macrophages play a previously underappreciated but potentially important role in mucosal HIV-1 infection in the female genital tract.
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Affiliation(s)
- Ruizhong Shen
- Department of Medicine (Gastroenterology), University of Alabama at Birmingham, Birmingham, Alabama 35294, USA
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47
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Ahmed Z, Akerib DS, Arrenberg S, Attisha MJ, Bailey CN, Baudis L, Bauer DA, Beaty J, Brink PL, Bruch T, Bunker R, Burke S, Cabrera B, Caldwell DO, Cooley J, Cushman P, Dejongh F, Dragowsky MR, Duong L, Emes J, Figueroa-Feliciano E, Filippini J, Fritts M, Gaitskell RJ, Golwala SR, Grant DR, Hall J, Hennings-Yeomans R, Hertel S, Holmgren D, Huber ME, Mahapatra R, Mandic V, McCarthy KA, Mirabolfathi N, Nelson H, Novak L, Ogburn RW, Pyle M, Qiu X, Ramberg E, Rau W, Reisetter A, Saab T, Sadoulet B, Sander J, Schmitt R, Schnee RW, Seitz DN, Serfass B, Sirois A, Sundqvist KM, Tarka M, Tomada A, Wang G, Yellin S, Yoo J, Young BA. Search for weakly interacting massive particles with the first five-tower data from the cryogenic dark matter search at the soudan underground laboratory. Phys Rev Lett 2009; 102:011301. [PMID: 19257177 DOI: 10.1103/physrevlett.102.011301] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2008] [Indexed: 05/27/2023]
Abstract
We report results from the Cryogenic Dark Matter Search at the Soudan Underground Laboratory (CDMS II) featuring the full complement of 30 detectors. A blind analysis of data taken between October 2006 and July 2007 sets an upper limit on the weakly interacting massive particle (WIMP) nucleon spin-independent cross section of 6.6x10;{-44} cm;{2} (4.6x10;{-44} cm;{2} when combined with previous CDMS II data) at the 90% confidence level for a WIMP mass of 60 GeV/c;{2}. This achieves the best sensitivity for dark matter WIMPs with masses above 44 GeV/c;{2}, and significantly restricts the parameter space for some favored supersymmetric models.
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Affiliation(s)
- Z Ahmed
- Department of Physics, California Institute of Technology, Pasadena, California 91125, USA
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Novak L, Shen R, Smythies LE, Smith PD. Improved visualization of GFP‐labeled HIV‐1 virions in human mucosa using confocal microscopy and image analysis. FASEB J 2008. [DOI: 10.1096/fasebj.22.2_supplement.493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Ruizhong Shen
- GastroenterologyUniversity of Alabama at BirminghamBirminghamAL
| | | | - Phillip D Smith
- GastroenterologyUniversity of Alabama at BirminghamBirminghamAL
- GastroenterologyVeterans AdministrationBirminghamAL
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Suzuki H, Moldoveanu Z, Hall S, Brown R, Vu HL, Novak L, Julian BA, Tomana M, Wyatt RJ, Edberg JC, Alarcón GS, Kimberly RP, Tomino Y, Mestecky J, Novak J. IgA1-secreting cell lines from patients with IgA nephropathy produce aberrantly glycosylated IgA1. J Clin Invest 2008; 118:629-39. [PMID: 18172551 DOI: 10.1172/jci33189] [Citation(s) in RCA: 149] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2007] [Accepted: 10/24/2007] [Indexed: 01/05/2023] Open
Abstract
Aberrant glycosylation of IgA1 plays an essential role in the pathogenesis of IgA nephropathy. This abnormality is manifested by a deficiency of galactose in the hinge-region O-linked glycans of IgA1. Biosynthesis of these glycans occurs in a stepwise fashion beginning with the addition of N-acetylgalactosamine by the enzyme N-acetylgalactosaminyltransferase 2 and continuing with the addition of either galactose by beta1,3-galactosyltransferase or a terminal sialic acid by a N-acetylgalactosamine-specific alpha2,6-sialyltransferase. To identify the molecular basis for the aberrant IgA glycosylation, we established EBV-immortalized IgA1-producing cells from peripheral blood cells of patients with IgA nephropathy. The secreted IgA1 was mostly polymeric and had galactose-deficient O-linked glycans, characterized by a terminal or sialylated N-acetylgalactosamine. As controls, we showed that EBV-immortalized cells from patients with lupus nephritis and healthy individuals did not produce IgA with the defective galactosylation pattern. Analysis of the biosynthetic pathways in cloned EBV-immortalized cells from patients with IgA nephropathy indicated a decrease in beta1,3-galactosyltransferase activity and an increase in N-acetylgalactosamine-specific alpha2,6-sialyltransferase activity. Also, expression of beta1,3-galactosyltransferase was significantly lower, and that of N-acetylgalactosamine-specific alpha2,6-sialyltransferase was significantly higher than the expression of these genes in the control cells. Thus, our data suggest that premature sialylation likely contributes to the aberrant IgA1 glycosylation in IgA nephropathy and may represent a new therapeutic target.
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Affiliation(s)
- Hitoshi Suzuki
- University of Alabama at Birmingham, Birmingham, Alabama 35294, USA
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50
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Cocaign-Bousquet M, Garrigues C, Novak L, Lindley N, Loublere P. Rational development of a simple synthetic medium for the sustained growth ofLactococcus lactis. ACTA ACUST UNITED AC 2008. [DOI: 10.1111/j.1365-2672.1995.tb03131.x] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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