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Khadka S, Omura S, Sato F, Tsunoda I. Adjuvant Injections Altered the Ileal and Fecal Microbiota Differently with Changes in Immunoglobulin Isotypes and Antimycobacterial Antibody Responses. Int J Mol Sci 2023; 24:ijms24032818. [PMID: 36769136 PMCID: PMC9917480 DOI: 10.3390/ijms24032818] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/28/2023] [Accepted: 01/30/2023] [Indexed: 02/05/2023] Open
Abstract
Alterations in the gut microbiota, "dysbiosis," have been reported in autoimmune diseases, including multiple sclerosis (MS), and their animal models. Although the animal models were induced by injections of autoantigens with adjuvants, including complete Freund's adjuvant (CFA) and pertussis toxin (PT), the effects of adjuvant injections on the microbiota are largely unknown. We aimed to clarify whether adjuvant injections could affect the microbiota in the ileum and feces. Using 16S rRNA sequencing, we found decreased alpha diversities of the gut microbiota in mice injected with CFA and PT, compared with naïve mice. Overall, microbial profiles visualized by principal component analysis demonstrated dysbiosis in feces, but not in the ileum, of adjuvant-injected mice, where the genera Lachnospiraceae NK4A136 group and Alistipes contributed to dysbiosis. When we compared the relative abundances of individual bacteria, we found changes in 16 bacterial genera in feces and seven genera in the ileum of adjuvant-injected mice, in which increased serum levels of antibody against mycobacteria (a component of CFA) and total IgG2c were correlated with the genus Facklamia. On the other hand, increased IgG1 and IgA concentrations were correlated with the genus Atopostipes. Therefore, adjuvant injections alone could alter the overall microbial profiles (i.e., microbiota) and individual bacterial abundances with altered antibody responses; dysbiosis in animal models could be partly due to adjuvant injections.
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Jaalkhorol M, Dulamsuren O, Dashtseren A, Byambajav EA, Khaidav N, Bat-Orgil B, Bold A, Amgalan E, Chuluunbaatar A, Tsunoda I. Multiple Sclerosis in Mongolia; the First Study Exploring Predictors of Disability and Depression in Mongolian MS Patients. Pathophysiology 2023; 30:15-26. [PMID: 36810422 DOI: 10.3390/pathophysiology30010003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 01/09/2023] [Accepted: 01/17/2023] [Indexed: 01/24/2023] Open
Abstract
Mongolia is located at 45° north latitude in the center of the Asian continent, and about 80% of the territory is at 1000 m above sea level. Epidemiologically, multiple sclerosis (MS) has not been investigated in Mongolia, although there have been a few MS case reports. We investigated the characteristics of MS in Mongolia for the first time, focusing on the association between MS-related parameters and depression levels. We initiated cross-sectional analyses, using data from 27 MS patients aged 20 to 60 years in Ulaanbaatar, Mongolia. The patients completed a questionnaire on their lifestyles and clinical information. We classified the MS patients on the basis of disability levels using the expanded disability status scale (EDSS) scores: 11.1% mild disability and 88.9% moderate to severe disability (median EDSS score, 5.5). We also classified the patients on the basis of depression levels using the 9-item patient health questionnaire (PHQ-9) scores: 44.4% mild depression, 40.7% moderate depression, and 14.8% severe depression (mean PHQ-9's score, 9.96 ± 5.05). We used multivariate logistical regression analyses to identify predictors of EDSS or PHQ-9 scores. Disability levels were associated with vision and balance problems. Depression levels were associated with corticosteroid treatment; no patients were treated with disease-modifying drugs (DMDs). The odds ratios for disease onset age and treatment duration were associated with EDSS scores. In conclusion, MS onset age and treatment duration were independent predicting factors influencing the level of disability. Appropriate DMD treatment would lower the disability and depression levels.
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Matsumura N, Shiro R, Tsunoda I. Critical evaluation on roles of macrophagic myofasciitis and aluminum adjuvants in HPV vaccine-induced adverse events. Cancer Sci 2023; 114:1218-1228. [PMID: 36601818 PMCID: PMC10067403 DOI: 10.1111/cas.15714] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 11/29/2022] [Accepted: 12/29/2022] [Indexed: 01/06/2023] Open
Abstract
Cervical cancer is caused by human papillomavirus (HPV) infection, which is preventable by HPV vaccines. In Japan, the HPV vaccination rate has remained extremely low due to the concerns for alleged neuropsychological symptoms or "diverse symptoms" following injections of two HPV vaccines, Cervarix and Gardasil, in HPV vaccine lawsuits. In the lawsuits, the attorneys' group has used several manuscripts proposing that aluminum (Al) adjuvant contained in HPV vaccines causes an immune-mediated disease, called macrophagic myofasciitis (MMF), as well as pathology in the central nervous system (CNS). We scientifically evaluated these manuscripts describing the "Al adjuvant-induced pathologies," particularly MMF. Although MMF patients have been reported to develop clinical symptoms/signs in various organs, including the CNS, muscle biopsy of the patients and animal experiments demonstrated that MMF pathology was localized only at the injected muscle. No muscle pathology which characterizes MMF was observed in any other muscles; thus, the systemic and neurological signs of MMF cases were irrelevant to localized MMF pathology. We evaluated that MMF-like pathology was induced as a local inflammatory response following vaccinations; MMF pathology was not the cause of systemic inflammation or "diverse symptoms." Lastly, MMF cases have been reported after vaccinations with Al-hydroxide-containing vaccines exclusively. As Al-hydroxide is a component of Cervarix, but not Gardasil, "diverse symptoms" following two HPV vaccinations in Japan cannot be explained by MMF. Our evaluation would help readers understand the validity of the manuscripts on the role of Al adjuvants or MMF for the alleged "diverse symptoms."
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Affiliation(s)
- Noriomi Matsumura
- Department of Obstetrics and Gynecology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Reona Shiro
- Department of Obstetrics and Gynecology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
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Omura S, Shimizu K, Kuwahara M, Morikawa-Urase M, Kusunoki S, Tsunoda I. Exploratory factor analysis determines latent factors in Guillain-Barré syndrome. Sci Rep 2022; 12:21837. [PMID: 36528634 DOI: 10.1038/s41598-022-26422-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022] Open
Abstract
Exploratory factor analysis (EFA) has been developed as a powerful statistical procedure in psychological research. EFA's purpose is to identify the nature and number of latent constructs (= factors) underlying a set of observed variables. Since the research goal of EFA is to determine what causes the observed responses, EFA is ideal for hypothesis-based studies, such as identifying the number and nature of latent factors (e.g., cause, risk factors, etc.). However, the application of EFA in the biomedical field has been limited. Guillain-Barré syndrome (GBS) is peripheral neuropathy, in which the presence of antibodies to glycolipids has been associated with clinical signs. Although the precise mechanism for the generation of anti-glycolipid antibodies is unclear, we hypothesized that latent factors, such as distinct autoantigens and microbes, could induce different sets of anti-glycolipid antibodies in subsets of GBS patients. Using 55 glycolipid antibody titers from 100 GBS and 30 control sera obtained by glycoarray, we conducted EFA and extracted four factors related to neuroantigens and one potentially suppressive factor, each of which was composed of the distinct set of anti-glycolipid antibodies. The four groups of anti-glycolipid antibodies categorized by unsupervised EFA were consistent with experimental and clinical findings reported previously. Therefore, we proved that unsupervised EFA could be applied to biomedical data to extract latent factors. Applying EFA for other biomedical big data may elucidate latent factors of other diseases with unknown causes or suppressing/exacerbating factors, including COVID-19.
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Park AM, Tsunoda I. Helicobacter pylori infection in the stomach induces neuroinflammation: the potential roles of bacterial outer membrane vesicles in an animal model of Alzheimer's disease. Inflamm Regen 2022; 42:39. [PMID: 36058998 PMCID: PMC9442937 DOI: 10.1186/s41232-022-00224-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 08/09/2022] [Indexed: 02/06/2023] Open
Abstract
Helicobacter pylori (HP) is a Gram-negative bacterium that colonizes the human stomach chronically. Colonization of HP in the gastric mucosa not only causes gastrointestinal diseases, but also is associated with extra-gastric diseases, such as idiopathic thrombocytopenic purpura and neurological diseases. Among neurological diseases, epidemiological studies have shown that HP infection increases the prevalence of Alzheimer's disease (AD) and Parkinson's disease (PD). Since HP does not invade the central nervous system (CNS), it has been considered that systemic immunological changes induced by HP infection may play pathogenic roles in AD and PD. Here, we investigated the effects of HP infection on the CNS in vivo and in vitro. In the CNS, chronically HP-infected mice had microglial activation without HP colonization, although systemic immunological changes were not observed. This led us to explore the possibility that HP-derived outer membrane vesicles (HP-OMVs) could cause neuroinflammation. OMVs are small, spherical bilayer vesicles (20-500 nm) released into the extracellular space from the outer membrane of Gram-negative bacteria; OMVs contain lipopolysaccharide, proteins, peptidoglycan, DNA, and RNA. OMVs have also been shown to activate both innate and acquired immune cells in vitro, and to disrupt the tight junctions of the gastric epithelium ("leaky gut") as well as cross the blood-brain barrier in vivo. Thus, in theory, OMVs can activate immune responses in the remote organs, including the lymphoid organs and CNS, if only OMVs enter the systemic circulation. From the exosome fraction of sera from HP-infected mice, we detected HP-specific DNA, suggesting the presence of HP-OMVs. We also found that microglia incubated with HP-OMVs in vitro increased the cell proliferation, inflammatory cytokine production, and migration. On the other hand, HP-OMVs suppressed the cell proliferation of neuroblastoma in vitro. Lastly, we found that AD model mice infected with HP had amyloid plaques adjacent to activated microglia and astrocytes in vivo. Based on the literature review and our experimental data, we propose our working hypothesis that OMVs produced in chronic HP infection in the gut induce neuroinflammation in the CNS, explaining the higher prevalence of AD in HP-infected people.
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Affiliation(s)
- Ah-Mee Park
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan.
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan
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Park AM, Khadka S, Sato F, Omura S, Fujita M, Hashiwaki K, Tsunoda I. Bacterial and fungal isolation from face masks under the COVID-19 pandemic. Sci Rep 2022; 12:11361. [PMID: 35851044 PMCID: PMC9293923 DOI: 10.1038/s41598-022-15409-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 03/01/2022] [Accepted: 06/23/2022] [Indexed: 02/08/2023] Open
Abstract
The COVID-19 pandemic has led people to wear face masks daily in public. Although the effectiveness of face masks against viral transmission has been extensively studied, there have been few reports on potential hygiene issues due to bacteria and fungi attached to the face masks. We aimed to (1) quantify and identify the bacteria and fungi attaching to the masks, and (2) investigate whether the mask-attached microbes could be associated with the types and usage of the masks and individual lifestyles. We surveyed 109 volunteers on their mask usage and lifestyles, and cultured bacteria and fungi from either the face-side or outer-side of their masks. The bacterial colony numbers were greater on the face-side than the outer-side; the fungal colony numbers were fewer on the face-side than the outer-side. A longer mask usage significantly increased the fungal colony numbers but not the bacterial colony numbers. Although most identified microbes were non-pathogenic in humans; Staphylococcus epidermidis, Staphylococcus aureus, and Cladosporium, we found several pathogenic microbes; Bacillus cereus, Staphylococcus saprophyticus, Aspergillus, and Microsporum. We also found no associations of mask-attached microbes with the transportation methods or gargling. We propose that immunocompromised people should avoid repeated use of masks to prevent microbial infection.
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Affiliation(s)
- Ah-Mee Park
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan.
| | - Sundar Khadka
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan
| | - Fumitaka Sato
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan
| | - Seiichi Omura
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan
| | - Mitsugu Fujita
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan
| | - Kazuki Hashiwaki
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan
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Matsumura N, Tsunoda I. Scientific evaluation of alleged findings in HPV vaccines; molecular mimicry and mouse models of vaccine-induced disease. Cancer Sci 2022; 113:3313-3320. [PMID: 35781393 PMCID: PMC9530884 DOI: 10.1111/cas.15482] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 06/19/2022] [Accepted: 06/27/2022] [Indexed: 02/05/2023] Open
Abstract
Cervical cancer is caused by infections of the human papillomavirus (HPV), which can be preventable by vaccinations. In Japan, although about 3,000 people died of cervical cancer annually, the HPV vaccination rate has remained extremely low in the eligible population, since many Japanese have been concerned that "diverse symptoms," such as chronic pain, movement disorders, and cognitive impairment, may occur as adverse reactions after HPV vaccination. The concern has been raised by media coverage of the ongoing HPV vaccine lawsuits, in which the plaintiffs complained of their symptoms caused by HPV vaccination. The claims have been based on the alleged pathogenic findings in research articles on HPV vaccines, summarized in the document prepared by the plaintiffs' attorneys. We critically evaluated these articles, in which the authors proposed the following findings/hypothesis: (i) molecular mimicry between HPV L1 and human proteins leads to the production of cross-reactive antibodies; and (ii) HPV vaccine injection in mice causes damage in the brain, a mouse model for "HPV vaccine associated neuro-immunopathic syndrome (HANS)." We found that they were based mainly on the findings from a few research groups and that all the articles had flaws in the method, result, or discussion sections. Our current evaluation would help better understand the validity of the findings, which have been often misunderstood as the truth by the general public. We propose to accumulate high-quality data on potential adverse events following HPV vaccination and to continue critically evaluating them.
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Affiliation(s)
- Noriomi Matsumura
- Department of Obstetrics and Gynecology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
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Khadka S, Omura S, Sato F, Nishio K, Kakeya H, Tsunoda I. Corrigendum: Curcumin β-D-Glucuronide Modulates an Autoimmune Model of Multiple Sclerosis with Altered Gut Microbiota in the Ileum and Feces. Front Cell Infect Microbiol 2022; 12:855411. [PMID: 35300380 PMCID: PMC8922402 DOI: 10.3389/fcimb.2022.855411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 02/01/2022] [Indexed: 02/05/2023] Open
Affiliation(s)
- Sundar Khadka
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Seiichi Omura
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Fumitaka Sato
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Kazuto Nishio
- Department of Genome Biology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Hideaki Kakeya
- Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
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Hafedh M, Parnow AH, Jalili C, I. Patel D, Tsunoda I. Regular Exercise Training Enhances Spatial Memory and Regulates Glucocorticoid System in Experimental Autoimmune Encephalomyelitis. JABS 2022. [DOI: 10.18502/jabs.v11i4.8632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Background & objective: Exercise has been shown to improve cognitive function in patients with multiple sclerosis (MS). Experimentally, glucocorticoids (GCs) treatment has been observed to improve cognitive deterioration in an autoimmune model for MS, experimental autoimmune encephalomyelitis (EAE). We aimed to determine the combined effect of exercise and 4 mg/kg of dexamethasone (Dex) for 4 weeks on spatial memory in EAE.
Materials & Methods: Rats with EAE were subjected to the Morris water maze (MWM) for four days and a prop test for one day. The prop test was repeated on day 40 post-induction (dpi). Rats were randomly assigned to one of four groups (10 rats per group): control EAE without treatment; EAE + dexamethasone, (EAE + Dex); EAE + exercise (EAE + Ex); and EAE+Dex+Ex. Rats receiving dexamethasone were administered 4 mg/kg injections daily for two weeks after EAE induction. Exercise training was initiated on a motorized treadmill 2 weeks before EAE induction and continued until 14 dpi. On day 41, animals were dissected and CORT level was assessed by enzyme-linked immunosorbent assay corticosterone kit.
Results: One-way analysis of variance (ANOVA) with repeated measures followed by a protected LSD post hoc test indicated that, EAE+Ex group increased body weight (P < 0.001) and it displayed a significantly lower CORT concentration (P <0.001) with delayed clinical score until day 13 dpi. Further EAE+Ex improved memory by time spent (p > 0.001) and swimming speed (p>0.002).
Conclusion: The protocol selected in this study was an effective treatment for the EAE model to improve spatial memory and regulate corticosterone concentrations.
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Sato F, Nakamura Y, Katsuki A, Khadka S, Ahmad I, Omura S, Martinez NE, Tsunoda I. Curdlan, a Microbial β-Glucan, Has Contrasting Effects on Autoimmune and Viral Models of Multiple Sclerosis. Front Cell Infect Microbiol 2022; 12:805302. [PMID: 35198458 PMCID: PMC8859099 DOI: 10.3389/fcimb.2022.805302] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 01/06/2022] [Indexed: 02/05/2023] Open
Abstract
Multiple sclerosis (MS) is an immune-mediated disease characterized by inflammatory demyelination and axonal degeneration in the central nervous system (CNS). Bacterial and fungal infections have been associated with the development of MS; microbial components that are present in several microbes could contribute to MS pathogenesis. Among such components, curdlan is a microbial 1,3-β-glucan that can stimulate dendritic cells, and enhances T helper (Th) 17 responses. We determined whether curdlan administration could affect two animal models for MS: an autoimmune model, experimental autoimmune encephalomyelitis (EAE), and a viral model, Theiler’s murine encephalomyelitis virus (TMEV)-induced demyelinating disease (TMEV-IDD). We induced relapsing-remitting EAE by sensitizing SJL/J mice with the myelin proteolipid protein (PLP)139-151 peptide and found that curdlan treatment prior to PLP sensitization converted the clinical course of EAE into hyperacute EAE, in which the mice developed a progressive motor paralysis and died within 2 weeks. Curdlan-treated EAE mice had massive infiltration of T cells and neutrophils in the CNS with higher levels of Th17 and Th1 responses, compared with the control EAE mice. On the other hand, in TMEV-IDD, we found that curdlan treatment reduced the clinical scores and axonal degeneration without changes in inflammation or viral persistence in the CNS. In summary, although curdlan administration exacerbated the autoimmune MS model by enhancing inflammatory demyelination, it suppressed the viral MS model with reduced axonal degeneration. Therefore, microbial infections may play contrasting roles in MS depending on its etiology: autoimmunity versus viral infection.
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Affiliation(s)
- Fumitaka Sato
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan.,Department of Microbiology and Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, Shreveport, LA, United States
| | - Yumina Nakamura
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan
| | - Aoshi Katsuki
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan
| | - Sundar Khadka
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan
| | - Ijaz Ahmad
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan
| | - Seiichi Omura
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan.,Department of Microbiology and Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, Shreveport, LA, United States
| | - Nicholas E Martinez
- Department of Microbiology and Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, Shreveport, LA, United States
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan.,Department of Microbiology and Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, Shreveport, LA, United States
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Khadka S, Omura S, Sato F, Nishio K, Kakeya H, Tsunoda I. Curcumin β-D-Glucuronide Modulates an Autoimmune Model of Multiple Sclerosis with Altered Gut Microbiota in the Ileum and Feces. Front Cell Infect Microbiol 2021; 11:772962. [PMID: 34926318 PMCID: PMC8677657 DOI: 10.3389/fcimb.2021.772962] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 11/08/2021] [Indexed: 02/05/2023] Open
Abstract
We developed a prodrug type of curcumin, curcumin monoglucuronide (CMG), whose intravenous/intraperitoneal injection achieves a high serum concentration of free-form curcumin. Although curcumin has been reported to alter the gut microbiota and immune responses, it is unclear whether the altered microbiota could be associated with inflammation in immune-mediated diseases, such as multiple sclerosis (MS). We aimed to determine whether CMG administration could affect the gut microbiota at three anatomical sites (feces, ileal contents, and the ileal mucosa), leading to suppression of inflammation in the central nervous system (CNS) in an autoimmune model for MS, experimental autoimmune encephalomyelitis (EAE). We injected EAE mice with CMG, harvested the brains and spinal cords for histological analyses, and conducted microbiome analyses using 16S rRNA sequencing. CMG administration modulated EAE clinically and histologically, and altered overall microbiota compositions in feces and ileal contents, but not the ileal mucosa. Principal component analysis (PCA) of the microbiome showed that principal component (PC) 1 values in ileal contents, but not in feces, correlated with the clinical and histological EAE scores. On the other hand, when we analyzed the individual bacteria of the microbiota, the EAE scores correlated with significant increases in the relative abundance of two bacterial species at each anatomical site: Ruminococcus bromii and Blautia (Ruminococcus) gnavus in feces, Turicibacter sp. and Alistipes finegoldii in ileal contents, and Burkholderia spp. and Azoarcus spp. in the ileal mucosa. Therefore, CMG administration could alter the gut microbiota at the three different sites differentially in not only the overall gut microbiome compositions but also the abundance of individual bacteria, each of which was associated with modulation of neuroinflammation.
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Affiliation(s)
- Sundar Khadka
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Seiichi Omura
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Fumitaka Sato
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Kazuto Nishio
- Department of Genome Biology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Hideaki Kakeya
- Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
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Khadka S, Pandit R, Dhital S, Baniya JB, Tiwari S, Shrestha B, Pandit S, Sato F, Fujita M, Sharma M, Tsunoda I, Mishra SK. Evaluation of Five International HBV Treatment Guidelines: Recommendation for Resource-Limited Developing Countries Based on the National Study in Nepal. Pathophysiology 2020; 27:3-13. [PMID: 34321716 PMCID: PMC8315108 DOI: 10.3390/pathophysiology27010002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Hepatitis B virus (HBV) infects the liver, causing cirrhosis and cancer. In developed countries, five international guidelines have been used to make a decision for the management of patients with chronic HBV infection. In this review, since the guidelines were established by clinical and epidemiological data of developed countries, we aimed to evaluate whether (1) HBV patient profiles of developing countries are similar to developed countries, and (2) which guideline can be applicable to resource-limited developing countries. First, as an example of the most recent data of HBV infections among developing countries, we evaluated the national HBV viral load study in Nepal, which were compared with the data from other developing countries. In Nepal, the highest number of patients had viral loads of 20–2000 IU/mL (36.7%) and belonged to the age group of 21–30 years; HBV epidemiology in Nepal, based on the viral loads, gender, and age groups was similar to those of not only other developing countries but also developed countries. Next, we reviewed five international HBV treatment guidelines of the World Health Organization (WHO), American Association for the Study of Liver Diseases (AASLD), National Institute for Health and Care Excellence (NICE), European Association for the Study of the Liver (EASL), and Asian Pacific Association for the Study of the Liver (APASL). All guidelines require the viral load and alanine aminotransferase (ALT) levels for decision making. Although four guidelines recommend elastography to assess liver cirrhosis, the WHO guideline alternatively recommends using the aspartate aminotransferase (AST)-to-platelet ratio index (APRI), which is inexpensive and conducted routinely in most hospitals. Therefore, in resource-limited developing countries like Nepal, we recommend the WHO guideline for HBV treatment based on the viral load, ALT, and APRI information.
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Affiliation(s)
- Sundar Khadka
- National Public Health Laboratory (NPHL), Department of Health Services, Ministry of Health and Population, Teku, Kathmandu 44-600, Nepal; (R.P.); (S.D.); (J.B.B.); (S.T.); (B.S.); (S.P.); (M.S.); (S.K.M.)
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka 589-8511, Japan; (F.S.); (M.F.)
- Correspondence: (S.K.); (I.T.)
| | - Roshan Pandit
- National Public Health Laboratory (NPHL), Department of Health Services, Ministry of Health and Population, Teku, Kathmandu 44-600, Nepal; (R.P.); (S.D.); (J.B.B.); (S.T.); (B.S.); (S.P.); (M.S.); (S.K.M.)
| | - Subhash Dhital
- National Public Health Laboratory (NPHL), Department of Health Services, Ministry of Health and Population, Teku, Kathmandu 44-600, Nepal; (R.P.); (S.D.); (J.B.B.); (S.T.); (B.S.); (S.P.); (M.S.); (S.K.M.)
| | - Jagat Bahadur Baniya
- National Public Health Laboratory (NPHL), Department of Health Services, Ministry of Health and Population, Teku, Kathmandu 44-600, Nepal; (R.P.); (S.D.); (J.B.B.); (S.T.); (B.S.); (S.P.); (M.S.); (S.K.M.)
| | - Surendra Tiwari
- National Public Health Laboratory (NPHL), Department of Health Services, Ministry of Health and Population, Teku, Kathmandu 44-600, Nepal; (R.P.); (S.D.); (J.B.B.); (S.T.); (B.S.); (S.P.); (M.S.); (S.K.M.)
| | - Bimal Shrestha
- National Public Health Laboratory (NPHL), Department of Health Services, Ministry of Health and Population, Teku, Kathmandu 44-600, Nepal; (R.P.); (S.D.); (J.B.B.); (S.T.); (B.S.); (S.P.); (M.S.); (S.K.M.)
| | - Sanjeet Pandit
- National Public Health Laboratory (NPHL), Department of Health Services, Ministry of Health and Population, Teku, Kathmandu 44-600, Nepal; (R.P.); (S.D.); (J.B.B.); (S.T.); (B.S.); (S.P.); (M.S.); (S.K.M.)
| | - Fumitaka Sato
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka 589-8511, Japan; (F.S.); (M.F.)
| | - Mitsugu Fujita
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka 589-8511, Japan; (F.S.); (M.F.)
| | - Mukunda Sharma
- National Public Health Laboratory (NPHL), Department of Health Services, Ministry of Health and Population, Teku, Kathmandu 44-600, Nepal; (R.P.); (S.D.); (J.B.B.); (S.T.); (B.S.); (S.P.); (M.S.); (S.K.M.)
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka 589-8511, Japan; (F.S.); (M.F.)
- Correspondence: (S.K.); (I.T.)
| | - Shravan Kumar Mishra
- National Public Health Laboratory (NPHL), Department of Health Services, Ministry of Health and Population, Teku, Kathmandu 44-600, Nepal; (R.P.); (S.D.); (J.B.B.); (S.T.); (B.S.); (S.P.); (M.S.); (S.K.M.)
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13
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Bodily JM, Tsunoda I, Alexander JS. Scientific Evaluation of the Court Evidence Submitted to the 2019 Human Papillomavirus Vaccine Libel Case and Its Decision in Japan. Front Med (Lausanne) 2020; 7:377. [PMID: 32850893 PMCID: PMC7405595 DOI: 10.3389/fmed.2020.00377] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 06/18/2020] [Indexed: 02/05/2023] Open
Affiliation(s)
- Jason M Bodily
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, United States.,Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, United States
| | - Ikuo Tsunoda
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, United States.,Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, United States.,Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Japan
| | - J Steven Alexander
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, United States
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14
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Omura S, Sato F, Park AM, Fujita M, Khadka S, Nakamura Y, Katsuki A, Nishio K, Gavins FNE, Tsunoda I. Bioinformatics Analysis of Gut Microbiota and CNS Transcriptome in Virus-Induced Acute Myelitis and Chronic Inflammatory Demyelination; Potential Association of Distinct Bacteria With CNS IgA Upregulation. Front Immunol 2020; 11:1138. [PMID: 32733435 PMCID: PMC7358278 DOI: 10.3389/fimmu.2020.01138] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 05/11/2020] [Indexed: 02/05/2023] Open
Abstract
Virus infections have been associated with acute and chronic inflammatory central nervous system (CNS) diseases, e.g., acute flaccid myelitis (AFM) and multiple sclerosis (MS), where animal models support the pathogenic roles of viruses. In the spinal cord, Theiler's murine encephalomyelitis virus (TMEV) induces an AFM-like disease with gray matter inflammation during the acute phase, 1 week post infection (p.i.), and an MS-like disease with white matter inflammation during the chronic phase, 1 month p.i. Although gut microbiota has been proposed to affect immune responses contributing to pathological conditions in remote organs, including the brain pathophysiology, its precise role in neuroinflammatory diseases is unclear. We infected SJL/J mice with TMEV; harvested feces and spinal cords on days 4 (before onset), 7 (acute phase), and 35 (chronic phase) p.i.; and examined fecal microbiota by 16S rRNA sequencing and CNS transcriptome by RNA sequencing. Although TMEV infection neither decreased microbial diversity nor changed overall microbiome patterns, it increased abundance of individual bacterial genera Marvinbryantia on days 7 and 35 p.i. and Coprococcus on day 35 p.i., whose pattern-matching with CNS transcriptome showed strong correlations: Marvinbryantia with eight T-cell receptor (TCR) genes on day 7 and with seven immunoglobulin (Ig) genes on day 35 p.i.; and Coprococcus with gene expressions of not only TCRs and IgG/IgA, but also major histocompatibility complex (MHC) and complements. The high gene expression of IgA, a component of mucosal immunity, in the CNS was unexpected. However, we observed substantial IgA positive cells and deposition in the CNS, as well as a strong correlation between CNS IgA gene expression and serum anti-TMEV IgA titers. Here, changes in a small number of distinct gut bacteria, but not overall gut microbiota, could affect acute and chronic immune responses, causing AFM- and MS-like lesions in the CNS. Alternatively, activated immune responses would alter the composition of gut microbiota.
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Affiliation(s)
- Seiichi Omura
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan.,Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - Fumitaka Sato
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan.,Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - Ah-Mee Park
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Mitsugu Fujita
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Sundar Khadka
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Yumina Nakamura
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Aoshi Katsuki
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Kazuto Nishio
- Department of Genome Biology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Felicity N E Gavins
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States.,Department of Biosciences, College of Health and Life Sciences, Brunel University London, Uxbridge, United Kingdom
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan.,Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
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15
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Park AM, Khadka S, Sato F, Omura S, Fujita M, Hsu DK, Liu FT, Tsunoda I. Galectin-3 as a Therapeutic Target for NSAID-Induced Intestinal Ulcers. Front Immunol 2020; 11:550366. [PMID: 33072090 PMCID: PMC7539695 DOI: 10.3389/fimmu.2020.550366] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 09/02/2020] [Indexed: 02/05/2023] Open
Abstract
UNLABELLED Non-steroidal anti-inflammatory drugs (NSAIDs) induce ulcers in the gastrointestinal tract, including the stomach and small intestine. NSAID-induced gastric ulcers can be prevented by taking acid-neutralizing/inhibitory drugs and cytoprotective agents. In contrast, there are no medicines to control NSAID-induced small intestinal ulcers, which are accompanied by a mucosal invasion of bacteria and subsequent activation of immune cells. Galectin-3 (Gal3), an endogenous lectin, has anti-microbial and pro-inflammatory functions. In the small intestine, since Gal3 is highly expressed in epithelial cells constitutively and macrophages inducibly, the Gal3 level can affect microbiota composition and macrophage activation. We hypothesized that the modulation of Gal3 expression could be beneficial in NSAID-induced intestinal ulcers. Using Gal3 knockout (Gal3KO) mice, we determined whether Gal3 could be a therapeutic target in NSAID-induced intestinal ulcers. Following the administration of indomethacin, an NSAID, we found that small intestinal ulcers were less severe in Gal3KO mice than in wild-type (WT) mice. We also found that the composition of intestinal microbiota was different between WT and Gal3KO mice and that bactericidal antibiotic polymyxin B treatment significantly suppressed NSAID-induced ulcers. Furthermore, clodronate, a macrophage modulator, attenuated NSAID-induced ulcers. Therefore, Gal3 could be an exacerbating factor in NSAID-induced intestinal ulcers by affecting the intestinal microbiota population and macrophage activity. Inhibition of Gal3 may be a therapeutic strategy in NSAID-induced intestinal ulcers. CLINICAL TRIAL REGISTRATION www.ClinicalTrials.gov, identifier NCT03832946.
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Affiliation(s)
- Ah-Mee Park
- Department of Microbiology, Faculty of Medicine, Kindai University, Osaka, Japan
- *Correspondence: Ah-Mee Park,
| | - Sundar Khadka
- Department of Microbiology, Faculty of Medicine, Kindai University, Osaka, Japan
| | - Fumitaka Sato
- Department of Microbiology, Faculty of Medicine, Kindai University, Osaka, Japan
| | - Seiichi Omura
- Department of Microbiology, Faculty of Medicine, Kindai University, Osaka, Japan
| | - Mitsugu Fujita
- Department of Microbiology, Faculty of Medicine, Kindai University, Osaka, Japan
| | - Daniel K. Hsu
- Department of Dermatology, University of California Davis Health System, Sacramento, CA, United States
| | - Fu-Tong Liu
- Department of Dermatology, University of California Davis Health System, Sacramento, CA, United States
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Ikuo Tsunoda
- Department of Microbiology, Faculty of Medicine, Kindai University, Osaka, Japan
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16
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Yun JW, Cvek U, Kilgore PCSR, Tsunoda I, Omura S, Sato F, Zivadinov R, Ramanathan M, Minagar A, Alexander JS. Neurolymphatic biomarkers of brain endothelial inflammatory activation: Implications for multiple sclerosis diagnosis. Life Sci 2019; 229:116-23. [PMID: 31082401 DOI: 10.1016/j.lfs.2019.05.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/01/2019] [Accepted: 05/09/2019] [Indexed: 02/08/2023]
Abstract
AIMS Multiple sclerosis (MS) is the leading cause of non-traumatic neurological disability in young adults, and its diagnosis is often delayed due to the lack of diagnostic markers. Initiation of disease -modifying therapy in the early stages of MS is especially critical because currently available therapy mostly target relapsing-remitting MS, and is less effective as disease progresses into the more chronic form of secondary-progressive MS. Therefore, exploring specific and sensitive biomarkers will facilitate an expedited and more accurate diagnosis to allow currently available therapies to be more effective. MAIN METHODS Western blotting was conducted to detect the expression of neurolymphatic proteins in human brain endothelial cells in culture. Additionally, using a cohort of 150 patients with relapsing remitting MS, 26 with secondary progressive MS, and 60 healthy control samples, neurolymphatic protein expression was detected in serum samples using dot blot analysis. KEY FINDINGS Human brain microvascular endothelial cells express neurolymphatic markers. Neurolymphatic protein abundance increases with tumor necrosis factor (TNF)-α stimulation but decreases with interferon (IFN)- γ or combined (TNF + IFN) treatment. Circulating neurolymphatic protein levels is significantly lower in MS patients. Further, one of the markers, FOXC2, is associated with the clinical stages of MS, with significantly lower expression in secondary progressive MS compared to relapsing remitting MS. SIGNIFICANCE Our findings describe brain endothelial expression of neurolymphatic proteins, which is altered under inflammatory stress, and provide a possibility of using a collective pool of circulating neurolymphatic proteins as a diagnostic and prognostic biomarker of MS.
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17
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Omura S, Sato F, Martinez NE, Park AM, Fujita M, Kennett NJ, Cvek U, Minagar A, Alexander JS, Tsunoda I. Bioinformatics Analyses Determined the Distinct CNS and Peripheral Surrogate Biomarker Candidates Between Two Mouse Models for Progressive Multiple Sclerosis. Front Immunol 2019; 10:516. [PMID: 30941144 PMCID: PMC6434997 DOI: 10.3389/fimmu.2019.00516] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 02/26/2019] [Indexed: 02/05/2023] Open
Abstract
Previously, we have established two distinct progressive multiple sclerosis (MS) models by induction of experimental autoimmune encephalomyelitis (EAE) with myelin oligodendrocyte glycoprotein (MOG) in two mouse strains. A.SW mice develop ataxia with antibody deposition, but no T cell infiltration, in the central nervous system (CNS), while SJL/J mice develop paralysis with CNS T cell infiltration. In this study, we determined biomarkers contributing to the homogeneity and heterogeneity of two models. Using the CNS and spleen microarray transcriptome and cytokine data, we conducted computational analyses. We identified up-regulation of immune-related genes, including immunoglobulins, in the CNS of both models. Pro-inflammatory cytokines, interferon (IFN)-γ and interleukin (IL)-17, were associated with the disease progression in SJL/J mice, while the expression of both cytokines was detected only at the EAE onset in A.SW mice. Principal component analysis (PCA) of CNS transcriptome data demonstrated that down-regulation of prolactin may reflect disease progression. Pattern matching analysis of spleen transcriptome with CNS PCA identified 333 splenic surrogate markers, including Stfa2l1, which reflected the changes in the CNS. Among them, we found that two genes (PER1/MIR6883 and FKBP5) and one gene (SLC16A1/MCT1) were also significantly up-regulated and down-regulated, respectively, in human MS peripheral blood, using data mining.
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Affiliation(s)
- Seiichi Omura
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Japan.,Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - Fumitaka Sato
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Japan.,Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - Nicholas E Martinez
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - Ah-Mee Park
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Japan
| | - Mitsugu Fujita
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Japan
| | - Nikki J Kennett
- Department of Pathology, University of Utah, Salt Lake City, UT, United States
| | - Urška Cvek
- Department of Computer Science, Louisiana State University Shreveport, Shreveport, LA, United States
| | - Alireza Minagar
- Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - J Steven Alexander
- Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States.,Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Japan.,Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States.,Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
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18
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Omura S, Kawai E, Sato F, Martinez NE, Minagar A, Al-Kofahi M, Yun JW, Cvek U, Trutschl M, Alexander JS, Tsunoda I. Theiler's Virus-Mediated Immunopathology in the CNS and Heart: Roles of Organ-Specific Cytokine and Lymphatic Responses. Front Immunol 2018; 9:2870. [PMID: 30619258 PMCID: PMC6295469 DOI: 10.3389/fimmu.2018.02870] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 11/21/2018] [Indexed: 02/05/2023] Open
Abstract
Theiler's murine encephalomyelitis virus (TMEV) induces different diseases in the central nervous system (CNS) and heart, depending on the mouse strains and time course, with cytokines playing key roles for viral clearance and immune-mediated pathology (immunopathology). In SJL/J mice, TMEV infection causes chronic TMEV-induced demyelinating disease (TMEV-IDD) in the spinal cord about 1 month post-inoculation (p.i.). Unlike other immunopathology models, both pro- and anti-inflammatory cytokines can play dual roles in TMEV-IDD. Pro-inflammatory cytokines play beneficial roles in viral clearance while they are also detrimental in immune-mediated demyelination. Anti-inflammatory cytokines suppress not only protective anti-viral immune responses but also detrimental autoreactive immune responses. Conversely, in C3H mice, TMEV infection induces a non-CNS disease, myocarditis, with three distinctive phases: phase I, viral pathology with interferon and chemokine responses; phase II, immunopathology mediated by acquired immune responses; and phase III, cardiac fibrosis. Although the exact mechanism(s) by which a single virus, TMEV, induces these different diseases in different organs is unclear, our bioinformatics approaches, especially principal component analysis (PCA) of transcriptome data, allow us to identify the key factors contributing to organ-specific immunopathology. The PCA demonstrated that in vitro infection of a cardiomyocyte cell line reproduced the transcriptome profile of phase I in TMEV-induced myocarditis; distinct interferon/chemokine-related responses were induced in vitro in TMEV-infected cardiomyocytes, but not in infected neuronal cells. In addition, the PCA of the in vivo CNS transcriptome data showed that decreased lymphatic marker expressions were weakly associated with inflammation in TMEV infection. Here, dysfunction of lymphatic vessels is shown to potentially contribute to immunopathology by delaying the clearance of cytokines and immune cells from the inflammatory site, although this can also confine the virus at these sites, preventing virus spread via lymphatic vessels. On the other hand, in the heart, dysfunction of lymphatics was associated with reduced lymphatic muscle contractility provoked by pro-inflammatory cytokines. Therefore, TMEV infection may induce different patterns of cytokine expressions as well as lymphatic vessel dysfunction by rather different mechanisms between the CNS and heart, which might explain observed patterns of organ-specific immunopathology.
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Affiliation(s)
- Seiichi Omura
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan.,Department of Microbiology and Immunology, Center for Molecular and Tumor Virology, Center for Cardiovascular Diseases and Sciences, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - Eiichiro Kawai
- Department of Microbiology and Immunology, Center for Molecular and Tumor Virology, Center for Cardiovascular Diseases and Sciences, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - Fumitaka Sato
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan.,Department of Microbiology and Immunology, Center for Molecular and Tumor Virology, Center for Cardiovascular Diseases and Sciences, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - Nicholas E Martinez
- Department of Microbiology and Immunology, Center for Molecular and Tumor Virology, Center for Cardiovascular Diseases and Sciences, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - Alireza Minagar
- Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - Mahmoud Al-Kofahi
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - J Winny Yun
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - Urska Cvek
- Department of Computer Science, Louisiana State University Shreveport, Shreveport, LA, United States
| | - Marjan Trutschl
- Department of Computer Science, Louisiana State University Shreveport, Shreveport, LA, United States
| | - J Steven Alexander
- Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States.,Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan.,Department of Microbiology and Immunology, Center for Molecular and Tumor Virology, Center for Cardiovascular Diseases and Sciences, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States.,Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, United States
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19
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Choi J, Cooper ML, Staser K, Ashami K, Vij KR, Wang B, Marsala L, Niswonger J, Ritchey J, Alahmari B, Achilefu S, Tsunoda I, Schroeder MA, DiPersio JF. Baricitinib-induced blockade of interferon gamma receptor and interleukin-6 receptor for the prevention and treatment of graft-versus-host disease. Leukemia 2018; 32:2483-2494. [PMID: 29691471 PMCID: PMC6168427 DOI: 10.1038/s41375-018-0123-z] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [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: 11/30/2017] [Revised: 02/26/2018] [Accepted: 03/15/2018] [Indexed: 02/08/2023]
Abstract
The therapeutic benefits of allogeneic hematopoietic stem cell transplantation (allo-HSCT) are derived from the graft-versus-leukemia (GvL) effects of the procedure. There is a strong association between the GvL effects and graft-versus-host disease (GvHD), a major life-threatening complication of allo-HSCT. The limiting of GvHD while maintaining the GvL effect remains the goal of allo-HSCT. Therefore, identifying optimal therapeutic targets to selectively suppress GvHD while maintaining the GvL effects represents a significant unmet medical need. We demonstrate that the dual inhibition of interferon gamma receptor (IFNγR) and interleukin-6 receptor (IL6R) results in near-complete elimination of GvHD in a fully major histocompatibility complex-mismatched allo-HSCT model. Furthermore, baricitinib (an inhibitor of Janus kinases 1 and 2 (JAK1/JAK2) downstream of IFNγR/IL6R) completely prevented GvHD; expanded regulatory T cells by preserving JAK3-STAT5 signaling; downregulated CXCR3 and helper T cells 1 and 2 while preserving allogeneic antigen-presenting cell-stimulated T-cell proliferation; and suppressed the expression of major histocompatibility complex II (I-Ad), CD80/86, and PD-L1 on host antigen-presenting cells. Baricitinib also reversed established GvHD with 100% survival, thus demonstrating both preventive and therapeutic roles for this compound. Remarkably, baricitinib enhanced the GvL effects, possibly by downregulating tumor PD-L1 expression.
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Affiliation(s)
- Jaebok Choi
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA.
| | - Matthew L Cooper
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Karl Staser
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Medicine, Division of Dermatology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Kidist Ashami
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Kiran R Vij
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Bing Wang
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Lynne Marsala
- Department of Radiology, Molecular Imaging Center, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Jessica Niswonger
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Julie Ritchey
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Bader Alahmari
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Samuel Achilefu
- Department of Radiology, Molecular Imaging Center, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, 589-8511, Japan
| | - Mark A Schroeder
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - John F DiPersio
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA.
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20
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Park AM, Tsunoda I, Yoshie O. Heat shock protein 27 promotes cell cycle progression by down-regulating E2F transcription factor 4 and retinoblastoma family protein p130. J Biol Chem 2018; 293:15815-15826. [PMID: 30166342 DOI: 10.1074/jbc.ra118.003310] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 08/23/2018] [Indexed: 02/05/2023] Open
Abstract
Heat shock protein 27 (HSP27) protects cells under stress. Here, we demonstrate that HSP27 also promotes cell cycle progression of MRC-5 human lung fibroblast cells. Serum starvation for 24 h induced G1 arrest in these cells, and upon serum refeeding, the cells initiated cell cycle progression accompanied by an increase in HSP27 protein levels. HSP27 levels peaked at 12 h, and transcriptional up-regulation of six G2/M-related genes (CCNA2, CCNB1, CCNB2, CDC25C, CDCA3, and CDK1) peaked at 24-48 h. siRNA-mediated HSP27 silencing in proliferating MRC-5 cells induced G2 arrest coinciding with down-regulation of these six genes. Of note, the promoters of all of these genes have the cell cycle-dependent element and/or the cell cycle gene-homology region. These promoter regions are known to be bound by the E2F family proteins (E2F-1 to E2F-8) and retinoblastoma (RB) family proteins (RB1, p107, and p130), among which E2F-4 and p130 were strongly up-regulated in HSP27-knockdown cells. E2F-4 or p130 knockdown concomitant with the HSP27 knockdown rescued MRC-5 cells from G2 arrest and up-regulated the six cell cycle genes. Moreover, we observed cellular senescence in MRC-5 cells on day 3 after the HSP27 knockdown, as evidenced by increased senescence-associated β-gal activity and up-regulated inflammatory cytokines. The cellular senescence was also suppressed by the concomitant knockdown of E2F-4/HSP27 or p130/HSP27. Our findings indicate that HSP27 promotes cell cycle progression of MRC-5 cells by suppressing expression of the transcriptional repressors E2F-4 and p130.
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Affiliation(s)
- Ah-Mee Park
- From the Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka 589-8511, Japan and
| | - Ikuo Tsunoda
- From the Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka 589-8511, Japan and
| | - Osamu Yoshie
- From the Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka 589-8511, Japan and.,the Health and Kampo Institute, 1-11-10 Murasakiyama, Sendai, Miyagi 981-3205, Japan
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21
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Al-Kofahi M, Omura S, Tsunoda I, Sato F, Becker F, Gavins FNE, Woolard MD, Pattillo C, Zawieja D, Muthuchamy M, Gashev A, Shihab I, Ghoweba M, Von der Weid PY, Wang Y, Alexander JS. IL-1β reduces cardiac lymphatic muscle contraction via COX-2 and PGE 2 induction: Potential role in myocarditis. Biomed Pharmacother 2018; 107:1591-1600. [PMID: 30257377 DOI: 10.1016/j.biopha.2018.08.004] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Revised: 08/01/2018] [Accepted: 08/03/2018] [Indexed: 02/05/2023] Open
Abstract
The role of lymphatic vessels in myocarditis is largely unknown, while it has been shown to play a key role in other inflammatory diseases. We aimed to investigate the role of lymphatic vessels in myocarditis using in vivo model induced with Theiler's murine encephalomyelitis virus (TMEV) and in vitro model with rat cardiac lymphatic muscle cells (RCLMC). In the TMEV model, we found that upregulation of a set of inflammatory mediator genes, including interleukin (IL)-1β, tumor necrosis factor (TNF)-αand COX-2 were associated with disease activity. Thus, using in vitro collagen gel contraction assays, we decided to clarify the role(s) of these mediators by testing contractility of RCLMC in response to IL-1β and TNF-α individually and in combination, in the presence or absence of: IL-1 receptor antagonist (Anakinra); cyclooxygenase (COX) inhibitors inhibitors (TFAP, diclofenac and DuP-697). IL-1β impaired RCLMC contractility dose-dependently, while co-incubation with both IL-1β and TNF-α exhibited synergistic effects in decreasing RCLMC contractility with increased COX-2 expression. Anakinra maintained RCLMC contractility; Anakinra blocked the mobilization of COX-2 induced by IL-1β with or without TNF-α. COX-2 inhibition blocked the IL-1β-mediated decrease in RCLMC contractility. Mechanistically, we found that IL-1β increased prostaglandin (PG) E2 release dose-dependently, while Anakinra blocked IL-1β mediated PGE2 release. Using prostaglandin E receptor 4 (EP4) receptor antagonist, we demonstrated that EP4 receptor blockade maintained RCLMC contractility following IL-1β exposure. Our results indicate that IL-1β reduces RCLMC contractility via COX-2/PGE2 signaling with synergistic cooperation by TNF-α. These pathways may help provoke inflammatory mediator accumulation within the heart, driving progression from acute myocarditis into dilated cardiomyopathy.
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Affiliation(s)
- Mahmoud Al-Kofahi
- Department of Molecular & Cellular Physiology, United States; Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, United States
| | - Seiichi Omura
- Department of Microbiology and Immunology, United States; Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Ikuo Tsunoda
- Department of Microbiology and Immunology, United States; Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, LA, United States; Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Fumitaka Sato
- Department of Microbiology and Immunology, United States; Department of Microbiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Felix Becker
- Department of Molecular & Cellular Physiology, United States; Department of General, Visceral and Transplant Surgery, University Hospital Muenster, Muenster, Germany
| | - Felicity N E Gavins
- Department of Molecular & Cellular Physiology, United States; Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, LA, United States
| | | | | | - David Zawieja
- Texas A&M University, College Station, TX, United States
| | | | | | - Israa Shihab
- Department of Molecular & Cellular Physiology, United States
| | - Mohamed Ghoweba
- Department of Molecular & Cellular Physiology, United States
| | | | - Yuping Wang
- Department of Molecular & Cellular Physiology, United States; Department of Obstetrics and Gynecology, United States
| | - J Steven Alexander
- Department of Molecular & Cellular Physiology, United States; Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, LA, United States.
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22
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Abstract
Fecal occult blood (FOB) is a sign of gastrointestinal diseases, such as intestinal ulcers and colorectal cancer. In experimental animal studies, there is no standard method to detect FOB. Here, we present a simple protocol to detect FOB in mice, using the Luminol Reaction Experiment Kit® that was originally designed to detect bloodstains at a crime scene in criminal forensics. To obtain positive control bloody feces, we used an indomethacin-induced intestinal ulcer model in mice. By mixing small pieces of feces with a luminol solution, the fecal solution emitted visible blue–white chemiluminescence in dark field when feces contained hemoglobin. We also established a method for semi-quantification of hemoglobin content in the fecal solution, using a luminometer. This method is simple, quick, economical and semi-quantitative, allowing researchers to detect FOB in experimental mice.
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Affiliation(s)
- Ah-Mee Park
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka 589-8511, Japan
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka 589-8511, Japan
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23
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Kanai K, Park AM, Watanabe A, Arikawa T, Yasui T, Yoshida H, Tsunoda I, Yoshie O. Murine γ-Herpesvirus 68 Induces Severe Lung Inflammation in IL-27-Deficient Mice with Liver Dysfunction Preventable by Oral Neomycin. J Immunol 2018; 200:2703-2713. [PMID: 29500240 DOI: 10.4049/jimmunol.1700412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 02/06/2018] [Indexed: 02/05/2023]
Abstract
IL-27 is an immunoregulatory cytokine consisting of p28 and EBI3. Its receptor also has two subunits, WSX1 and gp130. Although IL-27 promotes Th1 differentiation in naive T cells, it also induces IL-10 expression in effector Th1 cells to curtail excessive immune responses. By using p28-deficient mice and WSX1-deficient mice (collectively called IL-27-deficient mice), we examined the role of IL-27 in primary infection by murine γ-herpesvirus 68 (MHV68), a murine model of EBV. Upon airway infection with MHV68, IL-27-deficient mice had more aggravated lung inflammation than wild-type mice, although MHV68 infection per se was better controlled in IL-27-deficient mice. Although epithelial cells and alveolar macrophages were primarily infected by MHV68, interstitial macrophages and dendritic cells were the major producers of IL-27. The lung inflammation of IL-27-deficient mice was characterized by more IFN-γ-producing CD8+ T cells and fewer IL-10-producing CD8+ T cells than that of wild-type mice. An infectious mononucleosis-like disease was also aggravated in IL-27-deficient mice, with prominent splenomegaly and severe hepatitis. Infiltration of IFN-γ-producing effector cells and upregulation of the CXCR3 ligand chemokines CXCL9, CXCL10, and CXCL11 were noted in the liver of MHV68-infected mice. Oral neomycin effectively ameliorated hepatitis, with decreased production of these chemokines in the liver, suggesting that the intestinal microbiota plays a role in liver inflammation through upregulation of these chemokines. Collectively, IL-27 is essential for the generation of IL-10-producing effector cells in primary infection by MHV68. Our findings may also provide new insight into the mechanism of hepatitis associated with infectious mononucleosis.
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Affiliation(s)
- Kyosuke Kanai
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka 589-8511, Japan.,Division of Virology, Department of Microbiology and Immunology, Tottori University Faculty of Medicine, Yonago, Tottori 683-8503, Japan
| | - Ah-Mee Park
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka 589-8511, Japan
| | - Akiko Watanabe
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka 589-8511, Japan
| | - Tomohiro Arikawa
- Division of General Education, Department of Biology, Kanazawa Medical University, Uchinada, Kahoku-gun, Ishikawa 920-0293, Japan
| | - Teruhito Yasui
- Laboratory of Infectious Diseases and Immunity, National Institute of Biomedical Innovation, Health and Nutrition, Ibaraki, Osaka 567-0085, Japan
| | - Hiroki Yoshida
- Division of Molecular and Cellular Immunoscience, Department of Biomolecular Sciences, Faculty of Medicine, Saga University, Saga 840-8502, Japan; and
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka 589-8511, Japan
| | - Osamu Yoshie
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka 589-8511, Japan; .,The Health and Kampo Institute, Sendai, Miyagi 981-3205, Japan
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24
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Omura S, Sato F, Martinez NE, Range T, Ekshyyan L, Minagar A, Alexander JS, Tsunoda I. Immunoregulation of Theiler's virus-induced demyelinating disease by glatiramer acetate without suppression of antiviral immune responses. Arch Virol 2018; 163:1279-1284. [PMID: 29362931 DOI: 10.1007/s00705-018-3729-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 01/03/2018] [Indexed: 02/05/2023]
Abstract
While most disease-modifying drugs (DMDs) regulate multiple sclerosis (MS) by suppressing inflammation, they can potentially suppress antiviral immunity, causing progressive multifocal leukoencephalopathy (PML). The DMD glatiramer acetate (GA) has been used for MS patients who are at high risk of PML. We investigated whether GA is safe for use in viral infections by using a model of MS induced by infection with Theiler's murine encephalomyelitis virus (TMEV). Treatment of TMEV-infected mice with GA neither enhanced viral loads nor suppressed antiviral immune responses, while it resulted in an increase in the Foxp3/Il17a ratio and IL-4/IL-10 production. This is the first study to suggest that GA could be safe for MS patients with a proven viral infection.
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Affiliation(s)
- Seiichi Omura
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA.,Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA.,Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan
| | - Fumitaka Sato
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA.,Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA.,Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan
| | - Nicholas E Martinez
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA.,Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA
| | - Tierra Range
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA.,Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA
| | - Lesya Ekshyyan
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA.,Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA
| | - Alireza Minagar
- Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA
| | - J Steven Alexander
- Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA.,Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA
| | - Ikuo Tsunoda
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA. .,Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA. .,Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA. .,Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan.
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25
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Matsuo K, Nagakubo D, Yamamoto S, Shigeta A, Tomida S, Fujita M, Hirata T, Tsunoda I, Nakayama T, Yoshie O. CCL28-Deficient Mice Have Reduced IgA Antibody-Secreting Cells and an Altered Microbiota in the Colon. J Immunol 2018; 200:800-809. [PMID: 29237777 DOI: 10.4049/jimmunol.1700037] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 11/14/2017] [Indexed: 02/05/2023]
Abstract
CCL28 induces the migration of IgA Ab-secreting cells (ASCs) via CCR10 and also displays a potent antimicrobial activity in vitro. To explore the role of CCL28 in vivo, we generated CCL28-deficient mice. The mice exhibited a significant reduction and abnormal distribution of IgA ASCs in the lamina propria of the colon. The concentrations of total and Ag-specific IgA in the fecal extracts of CCL28-deficient mice were also drastically reduced. The average amount of IgA secreted by a single IgA ASC derived from the colon was also substantially reduced in CCL28-deficient mice. Furthermore, CCL28 was found to significantly increase the average amount of IgA secreted by a single IgA ASC derived from the colon in vitro. In contrast, the generation of IgA ASCs in Peyer's and cecal patches was not significantly impaired in CCL28-deficient mice. We also found a relative increase in the Class Bacilli in the fecal extracts of CCL28-deficient mice and demonstrated a potent antimicrobial activity of CCL28 against Bacillus cereus and Enterococcus faecalis, both of which belong to Class Bacilli. Thus, CCL28 may also suppress the outgrowth of some bacterial species by its direct antimicrobial activity. Finally, CCL28-deficient mice exhibited a highly aggravated dextran sodium sulfate-induced colitis that was ameliorated by pretreatment with antibiotics. Collectively, CCL28 plays a pivotal role in the homing, distribution, and function of IgA ASCs in the colon and may also affect the intestinal microbiota through its direct antimicrobial activity.
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Affiliation(s)
- Kazuhiko Matsuo
- Division of Chemotherapy, Kindai University Faculty of Pharmacy, Higashi-Osaka, Osaka 577-8502, Japan
| | - Daisuke Nagakubo
- Department of Fundamental Biosciences, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan
| | - Shinya Yamamoto
- Division of Chemotherapy, Kindai University Faculty of Pharmacy, Higashi-Osaka, Osaka 577-8502, Japan
| | - Akiko Shigeta
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka 589-8511, Japan; and
| | - Shuta Tomida
- Department of Biobank, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Kita-ku, Okayama 700-8558, Japan
| | - Mitsugu Fujita
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka 589-8511, Japan; and
| | - Takako Hirata
- Department of Fundamental Biosciences, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka 589-8511, Japan; and
| | - Takashi Nakayama
- Division of Chemotherapy, Kindai University Faculty of Pharmacy, Higashi-Osaka, Osaka 577-8502, Japan;
| | - Osamu Yoshie
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka 589-8511, Japan; and
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26
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Smith HK, Omura S, Vital SA, Becker F, Senchenkova EY, Kaur G, Tsunoda I, Peirce SM, Gavins FNE. Metallothionein I as a direct link between therapeutic hematopoietic stem/progenitor cells and cerebral protection in stroke. FASEB J 2017; 32:2381-2394. [PMID: 29269399 DOI: 10.1096/fj.201700746r] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Stroke continues to be a leading cause of death and disability worldwide, yet effective treatments are lacking. Previous studies have indicated that stem-cell transplantation could be an effective treatment. However, little is known about the direct impact of transplanted cells on injured brain tissue. We wanted to help fill this knowledge gap and investigated effects of hematopoietic stem/progenitor cells (HSPCs) on the cerebral microcirculation after ischemia-reperfusion injury (I/RI). Treatment of HSPCs in I/RI for up to 2 wk after cerebral I/RI led to decreased mortality rate, decreased infarct volume, improved functional outcome, reduced microglial activation, and reduced cerebral leukocyte adhesion. Confocal microscopy and fluorescence-activated cell sorting analyses showed transplanted HSPCs emigrate preferentially into ischemic cortex brain parenchyma. We isolated migrated HSPCs from the brain; using RNA sequencing to investigate the transcriptome, we found metallothionein (MT, particularly MT-I) transcripts were dramatically up-regulated. Finally, to confirm the significance of MT, we exogenously administered MT-I after cerebral I/RI and found that it produced neuroprotection in a manner similar to HSPC treatment. These findings provide novel evidence that the mechanism through which HSPCs promote repair after stroke maybe via direct action of HSPC-derived MT-I and could therefore be exploited as a useful therapeutic strategy for stroke.-Smith, H. K., Omura, S., Vital, S. A., Becker, F., Senchenkova, E. Y., Kaur, G., Tsunoda, I., Peirce, S. M., Gavins, F. N. E. Metallothionein I as a direct link between therapeutic hematopoietic stem/progenitor cells and cerebral protection in stroke.
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Affiliation(s)
- Helen K Smith
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, Louisiana, USA.,Pathology and Laboratory Medicine, Weill Cornell Medical College, New York City, New York, USA
| | - Seiichi Omura
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, Louisiana, USA.,Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan
| | - Shantel A Vital
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, Louisiana, USA
| | - Felix Becker
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, Louisiana, USA.,Department for General and Visceral Surgery, University Hospital Muenster, Muenster, Germany
| | - Elena Y Senchenkova
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, Louisiana, USA
| | - Gaganpreet Kaur
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, Louisiana, USA
| | - Ikuo Tsunoda
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, Louisiana, USA.,Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan.,Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, Louisiana, USA
| | - Shayn M Peirce
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA
| | - Felicity N E Gavins
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, Louisiana, USA.,Department of Neurology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, Louisiana, USA
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27
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Sato F, Kawai E, Martinez NE, Omura S, Park AM, Takahashi S, Yoh K, Tsunoda I. T-bet, but not Gata3, overexpression is detrimental in a neurotropic viral infection. Sci Rep 2017; 7:10496. [PMID: 28874814 PMCID: PMC5585213 DOI: 10.1038/s41598-017-10980-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 04/25/2017] [Accepted: 08/17/2017] [Indexed: 02/08/2023] Open
Abstract
Intracerebral Theiler's murine encephalomyelitis virus (TMEV) infection in mice induces inflammatory demyelination in the central nervous system. Although C57BL/6 mice normally resistant to TMEV infection with viral clearance, we have previously demonstrated that RORγt-transgenic (tg) C57BL/6 mice, which have Th17-biased responses due to RORγt overexpression in T cells, became susceptible to TMEV infection with viral persistence. Here, using T-bet-tg C57BL/6 mice and Gata3-tg C57BL/6 mice, we demonstrated that overexpression of T-bet, but not Gata3, in T cells was detrimental in TMEV infection. Unexpectedly, T-bet-tg mice died 2 to 3 weeks after infection due to failure of viral clearance. Here, TMEV infection induced splenic T cell depletion, which was associated with lower anti-viral antibody and T cell responses. In contrast, Gata3-tg mice remained resistant, while Gata3-tg mice had lower IFN-γ and higher IL-4 production with increased anti-viral IgG1 responses. Thus, our data identify how overexpression of T-bet and Gata3 in T cells alters anti-viral immunity and confers susceptibility to TMEV infection.
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Affiliation(s)
- Fumitaka Sato
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka 589-8511, Japan.,Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport (LSUHSC-S), 1501 Kings Highway, Shreveport, LA 71130, USA.,Center for Molecular and Tumor Virology (CMTV), Louisiana State University Health Sciences Center-Shreveport (LSUHSC-S), 1501 Kings Highway, Shreveport, LA 71130, USA.,Center for Cardiovascular Diseases and Sciences (CCDS), Louisiana State University Health Sciences Center-Shreveport (LSUHSC-S), 1501 Kings Highway, Shreveport, LA 71130, USA
| | - Eiichiro Kawai
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport (LSUHSC-S), 1501 Kings Highway, Shreveport, LA 71130, USA.,Center for Molecular and Tumor Virology (CMTV), Louisiana State University Health Sciences Center-Shreveport (LSUHSC-S), 1501 Kings Highway, Shreveport, LA 71130, USA
| | - Nicholas E Martinez
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport (LSUHSC-S), 1501 Kings Highway, Shreveport, LA 71130, USA.,Center for Molecular and Tumor Virology (CMTV), Louisiana State University Health Sciences Center-Shreveport (LSUHSC-S), 1501 Kings Highway, Shreveport, LA 71130, USA
| | - Seiichi Omura
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka 589-8511, Japan.,Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport (LSUHSC-S), 1501 Kings Highway, Shreveport, LA 71130, USA.,Center for Molecular and Tumor Virology (CMTV), Louisiana State University Health Sciences Center-Shreveport (LSUHSC-S), 1501 Kings Highway, Shreveport, LA 71130, USA.,Center for Cardiovascular Diseases and Sciences (CCDS), Louisiana State University Health Sciences Center-Shreveport (LSUHSC-S), 1501 Kings Highway, Shreveport, LA 71130, USA
| | - Ah-Mee Park
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka 589-8511, Japan
| | - Satoru Takahashi
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan.,International Institute for Investigative Sleep Medicine (WPI-IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan.,Life Science Center, Tsukuba Research Alliance (TARA), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan.,Laboratory Animal Resource Center (LARC), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Keigyou Yoh
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka 589-8511, Japan. .,Department of Microbiology and Immunology, Louisiana State University Health Sciences Center-Shreveport (LSUHSC-S), 1501 Kings Highway, Shreveport, LA 71130, USA. .,Center for Molecular and Tumor Virology (CMTV), Louisiana State University Health Sciences Center-Shreveport (LSUHSC-S), 1501 Kings Highway, Shreveport, LA 71130, USA. .,Center for Cardiovascular Diseases and Sciences (CCDS), Louisiana State University Health Sciences Center-Shreveport (LSUHSC-S), 1501 Kings Highway, Shreveport, LA 71130, USA.
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28
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Tsunoda I. Lymphatic system and gut microbiota affect immunopathology of neuroinflammatory diseases, including multiple sclerosis, neuromyelitis optica and Alzheimer's disease. ACTA ACUST UNITED AC 2017; 8:177-179. [PMID: 29201154 DOI: 10.1111/cen3.12405] [Citation(s) in RCA: 19] [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] [Indexed: 02/05/2023]
Abstract
Microbial infections lead to neurological damages either by direct infection in the nervous tissues or by uncontrolled immune responses (immunopathology). For example, in Zika virus infection, microcephaly can be caused by the former, i.e., direct viral infection in the brain, while Guillain-Barré syndrome (GBS) seems to be antibody-mediated immunopathology. Although a variety of factors affect immunopathology, two essential systems maintaining whole-body homeostasis had long been neglected: 1) the lymphatic system and 2) microbiota. Only recently, the role of the lymphatic system in immunopathology is beginning to be clarified. During infection, increased lymphatic flow limits edema and prevent tissue dendritic cell retention, while lymphostasis can lead to chronic inflammation. The role of gut microbiota, particularly bacterial community, in immunopathology has also been clarified recently; "bad bacteria" are proposed to exacerbate any immunopathology. For example, Helicobacter pylori is associated with not only gastritis but also extra-intestinal diseases, including neuromyelitis optica (NMO) and Alzheimer's disease. However, H. pylori and another bad bacterium Clostridium perfringens type A have been proposed to be protective against multiple sclerosis (MS). The above discrepancy on the roles of microbiota can be attributed to several conflicting factors, such as oversimplification, methodology, and taxonomy, which are summarized as "10 pitfalls of microbiota studies."
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Affiliation(s)
- Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka 589-8511, Japan
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29
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Park AM, Omura S, Fujita M, Sato F, Tsunoda I. Helicobacter pylori and gut microbiota in multiple sclerosis versus Alzheimer's disease: 10 pitfalls of microbiome studies. Clin Exp Neuroimmunol 2017; 8:215-232. [PMID: 29158778 DOI: 10.1111/cen3.12401] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Alteration of microbiota has been associated with intestinal, inflammatory, and neurological diseases. Abundance of "good bacteria" such as Bifidobacterium, or their products have been generally believed to be beneficial for any diseases, while "bad bacteria" such as pathogenic Helicobacter pylori are assumed to be always detrimental for hosts. However, this is not the case when we compare and contrast the association of the gut microbiota with two neurological diseases, multiple sclerosis (MS) and Alzheimer's disease (AD). Following H. pylori infection, pro-inflammatory T helper (Th)1 and Th17 immune response are initially induced to eradicate bacteria. However, H. pylori evades the host immune response by inducing Th2 cells and regulatory T cells (Tregs) that produce anti-inflammatory interleukin (IL)-10. Suppression of anti-bacterial Th1/Th17 cells by Tregs may enhance gastric H. pylori propagation, followed by a cascade reaction involving vitamin B12 and folic acid malabsorption, plasma homocysteine elevation, and reactive oxygen species induction. This can damage the blood-brain barrier (BBB), leading to accumulation of amyloid-β in the brain, a hallmark of AD. On the other hand, this suppression of pro-inflammatory Th1/Th17 responses to H. pylori has protective effects on the hosts, since it prevents uncontrolled gastritis as well as suppresses the induction of encephalitogenic Th1/Th17 cells, which can mediate neuroinflammation in MS. The above scenario may explain why chronic H. pylori infection is positively associated with AD, while it is negatively associated with MS. Lastly, we list "10 pitfalls of microbiota studies", which will be useful for evaluating and designing clinical and experimental microbiota studies.
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Affiliation(s)
- Ah-Mee Park
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka 589-8511, Japan
| | - Seiichi Omura
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka 589-8511, Japan
| | - Mitsugu Fujita
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka 589-8511, Japan
| | - Fumitaka Sato
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka 589-8511, Japan
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka 589-8511, Japan
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Kanai K, Park AM, Yoshida H, Tsunoda I, Yoshie O. IL-35 Suppresses Lipopolysaccharide-Induced Airway Eosinophilia in EBI3-Deficient Mice. J Immunol 2017; 198:119-127. [PMID: 27881708 DOI: 10.4049/jimmunol.1600506] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 10/19/2016] [Indexed: 02/05/2023]
Abstract
EBI3 functions as the subunit of immune-regulatory cytokines, such as IL-27 and IL-35, by pairing with p28 and p35, respectively. We treated wild-type and EBI3-deficient mice with intratracheal administration of LPS and obtained bronchoalveolar lavage fluid (BALF) 24 h later. Although neutrophils were the predominant cells in BALF from both groups of mice, eosinophils were highly enriched and there was increased production of eosinophil-attracting chemokines CCL11 and CCL24 in BALF of EBI3-deficient mice. The bronchial epithelial cells and alveolar macrophages were the major producers of CCL11 and CCL24. Because no such increases in eosinophils were seen in BALF of p28/IL-27-deficient mice or WSX-1/IL-27Rα subunit-deficient mice upon intratracheal stimulation with LPS, we considered that the lack of IL-35 was responsible for the enhanced airway eosinophilia in EBI3-deficient mice. In vitro, IL-35 potently suppressed production of CCL11 and CCL24 by human lung epithelial cell lines treated with TNF-α and IL-1β. IL-35 also suppressed phosphorylation of STAT1 and STAT3 and induced suppressor of cytokine signaling 3. In vivo, rIL-35 dramatically reduced LPS-induced airway eosinophilia in EBI3-deficient mice, with concomitant reduction of CCL11 and CCL24, whereas neutralization of IL-35 significantly increased airway eosinophils in LPS-treated wild-type mice. Collectively, our results suggest that IL-35 negatively regulates airway eosinophilia, at least in part by reducing the production of CCL11 and CCL24.
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Affiliation(s)
- Kyosuke Kanai
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka 589-8511, Japan; and
| | - Ah-Mee Park
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka 589-8511, Japan; and
| | - Hiroki Yoshida
- Division of Molecular and Cellular Immunoscience, Department of Biomolecular Sciences, Saga University Faculty of Medicine, Saga 840-8502, Japan
| | - Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka 589-8511, Japan; and
| | - Osamu Yoshie
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka 589-8511, Japan; and
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Tsunoda I, Sato F, Omura S, Fujita M, Sakiyama N, Park AM. Three immune-mediated disease models induced by Theiler's virus: Multiple sclerosis, seizures and myocarditis. ACTA ACUST UNITED AC 2016; 7:330-345. [PMID: 28603559 DOI: 10.1111/cen3.12341] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Theiler's murine encephalomyelitis virus (TMEV) infection has been used as a viral model for multiple sclerosis (MS), as TMEV can induce chronic inflammatory demyelinating lesions with viral persistence in the spinal cord of SJL/J mice. In contrast, when C57BL/6 mice are infected with TMEV, the mice can clear the virus from the central nervous system (CNS), without viral persistence or demyelination, but develop seizures and hippocampal sclerosis, which has been used as a viral model for seizures/epilepsy. In the two TMEV-induced CNS disease models, not only viral infection, but also immune responses contribute to the pathogenesis. Interestingly, acquired immunity plays an effector role in the MS model, whereas innate immunity appears to contribute to the development of seizures. Recently, we have established the third TMEV-induced disease model, a mouse model for viral myocarditis, using C3H mice. TMEV-induced myocarditis is a triphasic disease, which mimics human myocarditis; phase I, mediated by viral replication in the heart and innate immunity; phase II, mediated by acquired immunity; and phase III, resulted from cardiac fibrosis. The genetic susceptibility to the aforementioned three models (MS, seizures and myocarditis) differs among mouse strains. We have compared and contrasted the three models induced by one single pathogen, TMEV, particularly in regard to the roles of T helper cells and natural killer T cells, which will give an insight into how interactions between the immune system and the host's genetic background determine the tissue tropism of virus and the development of virus-induced organ-specific immunopathology.
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Affiliation(s)
- Ikuo Tsunoda
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan
| | - Fumitaka Sato
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan
| | - Seiichi Omura
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan
| | - Mitsugu Fujita
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan
| | - Namie Sakiyama
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan
| | - Ah-Mee Park
- Department of Microbiology, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan
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Yun JW, Xiao A, Tsunoda I, Minagar A, Alexander JS. From trash to treasure: The untapped potential of endothelial microparticles in neurovascular diseases. Pathophysiology 2016; 23:265-274. [PMID: 27531185 DOI: 10.1016/j.pathophys.2016.08.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 08/04/2016] [Accepted: 08/12/2016] [Indexed: 02/08/2023] Open
Abstract
Discovered in 1947, microparticles (MP) represent a group of sub-micron cell-derived particles isolated by high speed centrifugation. Once regarded as cellular 'trash', in the past decade MP have gained tremendous attention in both basic sciences and medical research both as biomarkers and mediators of infection, injury and response to therapy. Because MP bear cell surface markers derived from parent cells, accumulate in extracellular fluids (plasma, serum, milk, urine, cerebrospinal fluid) MP based tests are being developed commercially as important components in 'liquid biopsy' approaches, providing valuable readouts in cardiovascular disease and cancer, as well as stroke, Alzheimer's disease and Multiple Sclerosis. Importantly, MP have been reported as mobile transport vectors in the intercellular transfer of mRNAs, microRNAs, lipids and proteins. Here we discuss MP structure, properties and functions with particular relevance to neurological and neurovascular diseases.
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Affiliation(s)
- J Winny Yun
- Departments of Molecular & Cellular Physiology, LSU Health Sciences Center, Shreveport, LA, United States
| | - Adam Xiao
- Departments of Molecular & Cellular Physiology, LSU Health Sciences Center, Shreveport, LA, United States
| | - Ikuo Tsunoda
- Departments of Neurology, LSU Health Sciences Center, Shreveport, LA, United States; Department of Microbiology, Kindai University, Faculty of Medicine, 377-2 Ohnohigashi, Osakasayama, Osaka, 589-8511, Japan
| | - Alireza Minagar
- Departments of Neurology, LSU Health Sciences Center, Shreveport, LA, United States
| | - J Steven Alexander
- Departments of Molecular & Cellular Physiology, LSU Health Sciences Center, Shreveport, LA, United States; Departments of Neurology, LSU Health Sciences Center, Shreveport, LA, United States.
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Becker F, Kurmaeva E, Gavins FN, Stevenson EV, Navratil AR, Jin L, Tsunoda I, Orr AW, Alexander JS, Ostanin DV. A Critical Role for Monocytes/Macrophages During Intestinal Inflammation-associated Lymphangiogenesis. Inflamm Bowel Dis 2016; 22:1326-45. [PMID: 26950310 DOI: 10.1097/MIB.0000000000000731] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Inflammation-associated lymphangiogenesis (IAL) is frequently observed in inflammatory bowel diseases. IAL is believed to limit inflammation by enhancing fluid and immune cell clearance. Although monocytes/macrophages (MΦ) are known to contribute to intestinal pathology in inflammatory bowel disease, their role in intestinal IAL has never been studied mechanistically. We investigated contributions of monocytes/MΦ to the development of intestinal inflammation and IAL. METHODS Because inflammatory monocytes express CC chemokine receptor 2 (CCR2), we used CCR2 diphtheria toxin receptor transgenic (CCR2.DTR) mice, in which monocytes can be depleted by diphtheria toxin injection, and CCR2 mice, which have reduced circulating monocytes. Acute or chronic colitis was induced by dextran sodium sulfate or adoptive transfer of CD4CD45RB T cells, respectively. Intestinal inflammation was assessed by flow cytometry, immunofluorescence, disease activity, and histopathology, whereas IAL was assessed by lymphatic vessel morphology and density. RESULTS We demonstrated that intestinal MΦ expressed vascular endothelial growth factor-C/D. In acute colitis, monocyte-depleted mice were protected from intestinal injury and showed reduced IAL, which was reversed after transfer of wild-type monocytes into CCR2 mice. In chronic colitis, CCR2 deficiency did not attenuate inflammation but reduced IAL. CONCLUSIONS We propose a dual role of MΦ in (1) promoting acute inflammation and (2) contributing to IAL. Our data suggest that intestinal inflammation and IAL could occur independently, because IAL was reduced in the absence of monocytes/MΦ, even when inflammation was present. Future inflammatory bowel disease therapies might exploit promotion of IAL and suppression of MΦ independently, to restore lymphatic clearance and reduce inflammation.
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Tsunoda I, Omura S, Sato F, Kusunoki S, Fujita M, Park AM, Hasanovic F, Yanagihara R, Nagata S. Neuropathogenesis of Zika Virus Infection : Potential Roles of Antibody-Mediated Pathology. Acta Med Kinki Univ 2016; 41:37-52. [PMID: 28428682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Zika virus (ZIKV) is an enveloped, positive-sense, single-stranded RNA virus that belongs to the genus Flavivirus, family Flaviviridae, which includes many human and animal pathogens, such as dengue virus (DENV), West Nile virus, and Japanese encephalitis virus. In the original as well as subsequent experimental and clinical reports, ZIKV seems to have moderate neurotropism (in animal models) and neurovirulence (in human fetuses), but no neuroinvasiveness (in human adults). Intrauterine ZIKV infection (viral pathology) has been linked to an increased incidence of microcephaly, while increased Guillain-Barré syndrome (GBS) following ZIKV infection is likely immune-mediated (immunopathology). Clinically, in ZIKV infection, antibodies against other flaviviruses, such as DENV, have been detected; these antibodies can cross-react with ZIKV without ZIKV neutralization. In theory, such non-neutralizing antibodies are generated at the expense of decreased production of neutralizing antibodies ("antigenic sin"), leading to poor viral clearance, while the non-neutralizing antibodies can also enhance viral replication in Fc receptor (FcR)-bearing cells via antibody-dependent enhancement (ADE). Here, we propose three potential roles of the antibody-mediated pathogenesis of ZIKV infection: 1) cross-reactive antibodies that recognize ZIKV and neural antigens cause GBS; 2) ZIKV-antibody complex is transported transplacentally via neonatal FcR (FcRn), resulting in fetal infection; and 3) ZIKV-antibody complex is taken up at peripheral nerve endings and transported to neurons in the central nervous system (CNS), by which the virus can enter the CNS without crossing the blood-brain barrier.
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Sato F, Martinez NE, Stewart EC, Omura S, Alexander JS, Tsunoda I. "Microglial nodules" and "newly forming lesions" may be a Janus face of early MS lesions; implications from virus-induced demyelination, the Inside-Out model. BMC Neurol 2015; 15:219. [PMID: 26499989 PMCID: PMC4619492 DOI: 10.1186/s12883-015-0478-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [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: 01/22/2015] [Accepted: 10/16/2015] [Indexed: 02/08/2023] Open
Abstract
Background Although the precise mechanism of initial lesion development in multiple sclerosis (MS) remains unclear, two different neuropathological findings have been reported as a potential early pathology of MS: “microglial nodules” and “newly forming lesions”, both of which contain neither T cell infiltration nor demyelination. In microglial nodules, damaged axons were associated with a small number of aggregated macrophages/microglia, while oligodendrocyte apoptosis was a characteristic in newly forming lesions. However, is the presence of “microglial nodules” and “oligodendrogliopathy” mutually exclusive? Might these two different observations be the same neuropathology (as proposed by the concept, “preactive lesions”), but interpreted differently based on the different theories of early MS lesion development, using different staining methods? Discussion Since two studies are looking at two distinct aspects of early MS pathogenesis (one focused on axons and the other on oligodendrocytes), in a sense, one can say that these two studies are complementary. On the other hand, experimentally, Wallerian degeneration (WD) has been demonstrated to induce both microglial nodules and oligodendrocyte apoptosis in the central nervous system (CNS). Here, when encephalitogenic T cells are present in the periphery in both autoimmune and viral models of MS, induction of WD in the CNS has been shown to result in the recruitment of T cells along the degenerated tract, leading to demyelination (Inside-Out model). These experimental findings are consistent with early MS pathology described by both “microglial nodules” and “newly forming lesions”. Conclusions The differences between the two neuropathological findings may be based on the preference of staining methods, where one group observed axonal and microglial pathology and the other observed oligodendrocyte apoptosis; a Janus face that is looked at from the two different sides.
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Affiliation(s)
- Fumitaka Sato
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130, USA. .,Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130, USA.
| | - Nicholas E Martinez
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130, USA. .,Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130, USA.
| | - Elaine Cliburn Stewart
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130, USA. .,Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130, USA.
| | - Seiichi Omura
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130, USA. .,Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130, USA.
| | - J Steven Alexander
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130, USA. .,Department of Neurology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130, USA.
| | - Ikuo Tsunoda
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130, USA. .,Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130, USA. .,Department of Neurology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71130, USA.
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Alexander JS, Chervenak R, Weinstock-Guttman B, Tsunoda I, Ramanathan M, Martinez N, Omura S, Sato F, Chaitanya GV, Minagar A, McGee J, Jennings MH, Monceaux C, Becker F, Cvek U, Trutschl M, Zivadinov R. Blood circulating microparticle species in relapsing-remitting and secondary progressive multiple sclerosis. A case-control, cross sectional study with conventional MRI and advanced iron content imaging outcomes. J Neurol Sci 2015; 355:84-9. [PMID: 26073484 DOI: 10.1016/j.jns.2015.05.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [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: 10/29/2014] [Revised: 05/12/2015] [Accepted: 05/20/2015] [Indexed: 02/08/2023]
Abstract
BACKGROUND Although multiple sclerosis (MS) is thought to represent an excessive and inappropriate immune response to several central nervous system (CNS) autoantigens, increasing evidence also suggests that MS may also be a neurovascular inflammatory disease, characterized by endothelial activation and shedding of cell membrane microdomains known as 'microparticles' into the circulation. OBJECTIVE To investigate the relationships between these endothelial biomarkers and MS. METHODS We examined the relative abundance of CD31(+)/PECAM-1, CD51(+)CD61(+) (αV-β3) and CD54(+) (ICAM-1) bearing microparticles in sera of healthy individuals, patients with relapsing-remitting MS, and secondary-progressive MS. We also investigated the correlation among circulating levels of different microparticle species in MS with conventional MRI (T2- and T1-lesion volumes and brain atrophy), as well as novel MR modalities [assessment of iron content on susceptibility-weighted imaging (SWI)-filtered phase]. RESULTS Differences in circulating microparticle levels were found among MS groups, and several microparticle species (CD31(+)/CD51(+)/CD61(+)/CD54(+)) were found to correlate with conventional MRI and SWI features of MS. CONCLUSION These results indicate that circulating microparticles' profiles in MS may support mechanistic roles for microvascular stress and injury which is an underlying contributor not only to MS initiation and progression, but also to pro-inflammatory responses.
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Affiliation(s)
- J S Alexander
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA
| | - R Chervenak
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - B Weinstock-Guttman
- The Jacobs Neurological Institute, Department of Neurology, University of Buffalo, Buffalo, NY, USA
| | - I Tsunoda
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - M Ramanathan
- Department of Pharmaceutical Sciences, State University of New York, Buffalo, NY, USA
| | - N Martinez
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - S Omura
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - F Sato
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - G V Chaitanya
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA
| | - A Minagar
- Department of Neurology, Louisiana State University Health-Shreveport, LA, USA.
| | - J McGee
- Department of Neurology, Louisiana State University Health-Shreveport, LA, USA
| | - M H Jennings
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA
| | - C Monceaux
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA
| | - F Becker
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA; Department for General and Visceral Surgery, Muenster, Germany
| | - U Cvek
- Computer Sciences Department, Louisiana State University-Shreveport, LA, USA
| | - M Trutschl
- Computer Sciences Department, Louisiana State University-Shreveport, LA, USA
| | - R Zivadinov
- The Jacobs Neurological Institute, Department of Neurology, University of Buffalo, Buffalo, NY, USA; Buffalo Neuroimaging Analysis Center, Department of Neurology, University of Buffalo, Buffalo, NY, USA
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Al-Kofahi M, Becker F, Gavins FNE, Woolard MD, Tsunoda I, Wang Y, Ostanin D, Zawieja DC, Muthuchamy M, von der Weid PY, Alexander JS. IL-1β reduces tonic contraction of mesenteric lymphatic muscle cells, with the involvement of cycloxygenase-2 and prostaglandin E2. Br J Pharmacol 2015; 172:4038-51. [PMID: 25989136 DOI: 10.1111/bph.13194] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 04/02/2015] [Accepted: 04/28/2015] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND AND PURPOSE The lymphatic system maintains tissue homeostasis by unidirectional lymph flow, maintained by tonic and phasic contractions within subunits, 'lymphangions'. Here we have studied the effects of the inflammatory cytokine IL-1β on tonic contraction of rat mesenteric lymphatic muscle cells (RMLMC). EXPERIMENTAL APPROACH We measured IL-1β in colon-conditioned media (CM) from acute (AC-CM, dextran sodium sulfate) and chronic (CC-CM, T-cell transfer) colitis-induced mice and corresponding controls (Con-AC/CC-CM). We examined tonic contractility of RMLMC in response to CM, the cytokines h-IL-1β or h-TNF-α (5, 10, 20 ng·mL(-1) ), with or without COX inhibitors [TFAP (10(-5) M), diclofenac (0.2 × 10(-5) M)], PGE2 (10(-5) M)], IL-1-receptor antagonist, Anakinra (5 μg·mL(-1) ), or a selective prostanoid EP4 receptor antagonist, GW627368X (10(-6) and 10(-7) M). KEY RESULTS Tonic contractility of RMLMC was reduced by AC- and CC-CM compared with corresponding control culture media, Con-AC/CC-CM. IL-1β or TNF-α was not found in Con-AC/CC-CM, but detected in AC- and CC-CM. h-IL-1β concentration-dependently decreased RMLMC contractility, whereas h-TNF-α showed no effect. Anakinra blocked h-IL-1β-induced RMLMC relaxation, and with AC-CM, restored contractility to RMLMC. IL-1β increased COX-2 protein and PGE2 production in RMLMC.. PGE2 induced relaxations in RMLMC, comparable to h-IL-1β. Conversely, COX-2 and EP4 receptor inhibition reversed relaxation induced by IL-1β. CONCLUSIONS AND IMPLICATIONS The IL-1β-induced decrease in RMLMC tonic contraction was COX-2 dependent, and mediated by PGE2 . In experimental colitis, IL-1β and tonic lymphatic contractility were causally related, as this cytokine was critical for the relaxation induced by AC-CM and pharmacological blockade of IL-1β restored tonic contraction.
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Affiliation(s)
- M Al-Kofahi
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA
| | - F Becker
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA.,Department for General and Visceral Surgery, University Hospital Muenster, Muenster, Germany
| | - F N E Gavins
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA
| | - M D Woolard
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA
| | - I Tsunoda
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA
| | - Y Wang
- Department of Obstetrics and Gynecology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA
| | - D Ostanin
- Department of Medicine, Division of Rheumatology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA
| | - D C Zawieja
- Department of Medicine, Cardiovascular Research Institute, Texas A&M Health Science Center, College Station, TX, USA
| | - M Muthuchamy
- Department of Medicine, Cardiovascular Research Institute, Texas A&M Health Science Center, College Station, TX, USA
| | - P Y von der Weid
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada
| | - J S Alexander
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA
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Becker F, Potepalov S, Shehzahdi R, Bernas M, Witte M, Abreo F, Traylor J, Orr WA, Tsunoda I, Alexander JS. Downregulation of FoxC2 Increased Susceptibility to Experimental Colitis: Influence of Lymphatic Drainage Function? Inflamm Bowel Dis 2015; 21:1282-96. [PMID: 25822012 DOI: 10.1097/MIB.0000000000000371] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Although inflammation-induced expansion of the intestinal lymphatic vasculature (lymphangiogenesis) is known to be a crucial event in limiting inflammatory processes, through clearance of interstitial fluid and immune cells, considerably less is known about the impact of an impaired lymphatic clearance function (as seen in inflammatory bowel diseases) on this cascade. We aimed to investigate whether the impaired intestinal lymphatic drainage function observed in FoxC2 mice would influence the course of disease in a model of experimental colitis. METHODS Acute dextran sodium sulfate colitis was induced in wild-type and haploinsufficient FoxC2 mice, and survival, disease activity, colonic histopathological injury, neutrophil, T-cell, and macrophage infiltration were evaluated. Functional and structural changes in the intestinal lymphatic vessel network were analyzed, including submucosal edema, vessel morphology, and lymphatic vessel density. RESULTS We found that FoxC2 downregulation in FoxC2 mice significantly increased the severity and susceptibility to experimental colitis, as displayed by lower survival rates, increased disease activity, greater histopathological injury, and elevated colonic neutrophil, T-cell, and macrophage infiltration. These findings were accompanied by structural (dilated torturous lymphatic vessels) and functional (greater submucosal edema, higher immune cell burden) changes in the intestinal lymphatic vasculature. CONCLUSIONS These results indicate that sufficient lymphatic clearance plays a crucial role in limiting the initiation and perpetuation of experimental colitis and those disturbances in the integrity of the intestinal lymphatic vessel network could intensify intestinal inflammation. Future therapies might be able to exploit these processes to restore and maintain adequate lymphatic clearance function in inflammatory bowel disease.
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Greenlee JE, Clawson SA, Hill KE, Wood B, Clardy SL, Tsunoda I, Carlson NG. Anti-Yo antibody uptake and interaction with its intracellular target antigen causes Purkinje cell death in rat cerebellar slice cultures: a possible mechanism for paraneoplastic cerebellar degeneration in humans with gynecological or breast cancers. PLoS One 2015; 10:e0123446. [PMID: 25885452 PMCID: PMC4401511 DOI: 10.1371/journal.pone.0123446] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [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: 08/21/2014] [Accepted: 03/03/2015] [Indexed: 02/05/2023] Open
Abstract
Anti-Yo antibodies are immunoglobulin G (IgG) autoantibodies reactive with a 62 kDa Purkinje cell cytoplasmic protein. These antibodies are closely associated with paraneoplastic cerebellar degeneration in the setting of gynecological and breast malignancies. We have previously demonstrated that incubation of rat cerebellar slice cultures with patient sera and cerebrospinal fluid containing anti-Yo antibodies resulted in Purkinje cell death. The present study addressed three fundamental questions regarding the role of anti-Yo antibodies in disease pathogenesis: 1) Whether the Purkinje cell cytotoxicity required binding of anti-Yo antibody to its intraneuronal 62 kDa target antigen; 2) whether Purkinje cell death might be initiated by antibody-dependent cellular cytotoxicity rather than intracellular antibody binding; and 3) whether Purkinje cell death might simply be a more general result of intracellular antibody accumulation, rather than of specific antibody-antigen interaction. In our study, incubation of rat cerebellar slice cultures with anti-Yo IgG resulted in intracellular antibody binding, and cell death. Infiltration of the Purkinje cell layer by cells of macrophage/microglia lineage was not observed until extensive cell death was already present. Adsorption of anti-Yo IgG with its 62 kDa target antigen abolished both antibody accumulation and cytotoxicity. Antibodies to other intracellular Purkinje cell proteins were also taken up by Purkinje cells and accumulated intracellularly; these included calbindin, calmodulin, PCP-2, and patient anti-Purkinje cell antibodies not reactive with the 62 kDa Yo antigen. However, intracellular accumulation of these antibodies did not affect Purkinje cell viability. The present study is the first to demonstrate that anti-Yo antibodies cause Purkinje cell death by binding to the intracellular 62 kDa Yo antigen. Anti-Yo antibody cytotoxicity did not involve other antibodies or factors present in patient serum and was not initiated by brain mononuclear cells. Purkinje cell death was not simply due to intraneuronal antibody accumulation.
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Affiliation(s)
- John E Greenlee
- Neurology Service, George E. Wahlen Veterans Affairs Health Care System, Salt Lake City, Utah, United States of America; Department of Neurology, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Susan A Clawson
- Department of Neurology, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Kenneth E Hill
- Department of Neurology, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Blair Wood
- Department of Neurology, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Stacey L Clardy
- Neurology Service, George E. Wahlen Veterans Affairs Health Care System, Salt Lake City, Utah, United States of America; Department of Neurology, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Ikuo Tsunoda
- Department of Microbiology and Immunology Center for Molecular and Tumor Virology (CMTV), Louisiana State University Health Sciences Center, Shreveport, Louisiana, United States of America
| | - Noel G Carlson
- Department of Neurology, University of Utah School of Medicine, Salt Lake City, Utah, United States of America; Geriatric Research, Education, and Care Center (GRECC), George E. Wahlen Veterans Affairs Health Care System, Salt Lake City, Utah, United States of America; Research Service, George E. Wahlen Veterans Affairs Health Care System, Salt Lake City, Utah, United States of America; Department of Neurobiology and Anatomy, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
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Kawai E, Sato F, Omura S, Martinez NE, Reddy PC, Taniguchi M, Tsunoda I. Organ-specific protective role of NKT cells in virus-induced inflammatory demyelination and myocarditis depends on mouse strain. J Neuroimmunol 2015; 278:174-84. [PMID: 25434008 DOI: 10.1016/j.jneuroim.2014.11.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 10/14/2014] [Accepted: 11/03/2014] [Indexed: 02/08/2023]
Abstract
Theiler's murine encephalomyelitis virus (TMEV) can induce demyelination or myocarditis in susceptible mouse strains. A deficiency of NKT cells exacerbated TMEV-induced demyelinating disease (TMEV-IDD) in SJL/J and BALB/c mice. In C57BL/6 background, however, NKT-cell-deficient Jα18 KO mice remained as resistant to TMEV-IDD as wild-type mice. Echocardiography and histology showed that Jα18 KO mice developed more severe myocarditis (greater T cell infiltration and fibrosis) than wild-type mice, suggesting a protective role of NKT cells in myocarditis in C57BL/6 mice. Jα18 KO mice had higher cardiac viral RNA and anti-viral antibody titers, but had lower lymphoproliferation and IL-4 and IL-10 production.
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Martinez NE, Sato F, Kawai E, Omura S, Takahashi S, Yoh K, Tsunoda I. Th17-biased RORγt transgenic mice become susceptible to a viral model for multiple sclerosis. Brain Behav Immun 2015; 43:86-97. [PMID: 25046854 DOI: 10.1016/j.bbi.2014.07.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 07/01/2014] [Accepted: 07/10/2014] [Indexed: 02/08/2023] Open
Abstract
In a viral model for multiple sclerosis (MS), Theiler's murine encephalomyelitis virus-induced demyelinating disease (TMEV-IDD), both immune-mediated tissue damage (immunopathology) and virus persistence have been shown to cause pathology. T helper (Th) 17 cells are a Th cell subset, whose differentiation requires the transcription factor retinoic acid-related orphan receptor (ROR) γt, secrete pro-inflammatory cytokines, including IL-17, and can antagonize Th1 cells. Although Th17 cells have been shown to play a pathogenic role in immune-mediated diseases or a protective role in bacterial and fungal infections, their role in viral infections is unclear. Using newly established Th17-biased RORγt Tg mice, we tested whether Th17 cells could play a pathogenic or protective role in TMEV-IDD by contributing to immunopathology and/or by modulating anti-viral Th1 immune responses. While TMEV-infected wild-type littermate C57BL/6 mice are resistant to TMEV-IDD, RORγt Tg mice developed inflammatory demyelinating lesions with virus persistence in the spinal cord. TMEV-infected RORγt Tg mice had higher levels of IL-17, lower levels of interferon-γ, and fewer CD8(+) T cells, without alteration in overall levels of anti-viral lymphoproliferative and antibody responses, compared with TMEV-infected wild-type mice. This suggests that a Th17-biased "gain-of-function" mutation could increase susceptibility to virus-mediated demyelinating diseases.
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Martinez NE, Sato F, Omura S, Kawai E, Takahashi S, Yoh K, Tsunoda I. RORγt, but not T-bet, overexpression exacerbates an autoimmune model for multiple sclerosis. J Neuroimmunol 2014; 276:142-9. [PMID: 25288300 DOI: 10.1016/j.jneuroim.2014.09.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 09/08/2014] [Accepted: 09/09/2014] [Indexed: 02/05/2023]
Abstract
Th17 cells play an important role in multiple sclerosis (MS) and its autoimmune model, experimental autoimmune encephalomyelitis (EAE). However, studies have not addressed how enhanced Th17 immune responses can affect demyelinating diseases. We induced EAE with MOG in RORγt transgenic C57BL/6 mice that overexpress a Th17 inducing transcription factor. RORγt transgenic mice developed more severe EAE than wild-type mice with more robust anti-MOG Th17 immune responses. In contrast, mice overexpressing T-bet, a Th1-inducing transcription factor, were resistant to EAE. Therefore, a genetic bias toward Th17 immune responses could contribute to CNS immunopathology.
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Sato F, Omura S, Kawai E, Martinez NE, Acharya MM, Reddy PC, Chaitanya GV, Alexander JS, Tsunoda I. Distinct kinetics of viral replication, T cell infiltration, and fibrosis in three phases of myocarditis following Theiler's virus infection. Cell Immunol 2014; 292:85-93. [PMID: 25460083 DOI: 10.1016/j.cellimm.2014.10.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Revised: 10/20/2014] [Accepted: 10/22/2014] [Indexed: 02/08/2023]
Abstract
We established a novel model of myocarditis induced with Theiler’s murine encephalomyelitis virus (TMEV), which has been used as a viral model for multiple sclerosis and seizure/epilepsy. Following TMEV infection, C3H mice developed severe myocarditis with T cell infiltration, while C57BL/6 mice had mild lesions and SJL/J mice had no inflammation in the heart. In C3H mice, myocarditis was divided into three phases: acute viral, subacute immune, and chronic fibrotic phases. Using toll-like receptor (TLR) 4-deficient C3H mice, we found that interleukin (IL)-6, IL-17, TLR4, and anti-viral immune responses were associated with myocarditis susceptibility.
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Greenlee JE, Clawson SA, Hill KE, Wood B, Clardy SL, Tsunoda I, Jaskowski TD, Carlson NG. Neuronal uptake of anti-Hu antibody, but not anti-Ri antibody, leads to cell death in brain slice cultures. J Neuroinflammation 2014; 11:160. [PMID: 25228406 PMCID: PMC4174281 DOI: 10.1186/s12974-014-0160-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 08/23/2014] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Anti-Hu and anti-Ri antibodies are paraneoplastic immunoglobulin (Ig)G autoantibodies which recognize cytoplasmic and nuclear antigens present in all neurons. Although both antibodies produce similar immunohistological labeling, they recognize different neuronal proteins. Both antibodies are associated with syndromes of central nervous system dysfunction. However, the neurological deficits associated with anti-Hu antibody are associated with neuronal death and are usually irreversible, whereas neurological deficits in patients with anti-Ri antibody may diminish following tumor removal or immunosuppression. METHODS To study the effect of anti-Hu and anti-Ri antibodies on neurons, we incubated rat hippocampal and cerebellar slice cultures with anti-Hu or anti-Ri sera from multiple patients. Cultures were evaluated in real time for neuronal antibody uptake and during prolonged incubation for neuronal death. To test the specificity of anti-Hu antibody cytotoxic effect, anti-Hu serum IgG was incubated with rat brain slice cultures prior to and after adsorption with its target Hu antigen, HuD. RESULTS We demonstrated that: 1) both anti-Hu and anti-Ri antibodies were rapidly taken up by neurons throughout both cerebellum and hippocampus; 2) antibody uptake occurred in living neurons and was not an artifact of antibody diffusion into dead cells; 3) intracellular binding of anti-Hu antibody produced neuronal cell death, whereas uptake of anti-Ri antibody did not affect cell viability during the period of study; and 4) adsorption of anti-Hu antisera against HuD greatly reduced intraneuronal IgG accumulation and abolished cytotoxicity, confirming specificity of antibody-mediated neuronal death. CONCLUSIONS Both anti-Hu and anti-Ri antibodies were readily taken up by viable neurons in slice cultures, but the two antibodies differed markedly in terms of their effects on neuronal viability. The ability of anti-Hu antibodies to cause neuronal death could account for the irreversible nature of paraneoplastic neurological deficits in patients with this antibody response. Our results raise questions as to whether anti-Ri antibody might initially induce reversible neuronal dysfunction, rather than causing cell death. The ability of IgG antibodies to access and react with intracellular neuronal proteins could have implications for other autoimmune diseases involving the central nervous system.
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Omura S, Kawai E, Sato F, Martinez NE, Chaitanya GV, Rollyson PA, Cvek U, Trutschl M, Alexander JS, Tsunoda I. Bioinformatics multivariate analysis determined a set of phase-specific biomarker candidates in a novel mouse model for viral myocarditis. Circ Cardiovasc Genet 2014; 7:444-54. [PMID: 25031303 PMCID: PMC4332820 DOI: 10.1161/circgenetics.114.000505] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Myocarditis is an inflammatory disease of the cardiac muscle and is mainly caused by viral infections. Viral myocarditis has been proposed to be divided into 3 phases: the acute viral phase, the subacute immune phase, and the chronic cardiac remodeling phase. Although individualized therapy should be applied depending on the phase, no clinical or experimental studies have found biomarkers that distinguish between the 3 phases. Theiler's murine encephalomyelitis virus belongs to the genus Cardiovirus and can cause myocarditis in susceptible mouse strains. METHODS AND RESULTS Using this novel model for viral myocarditis induced with Theiler's murine encephalomyelitis virus, we conducted multivariate analysis including echocardiography, serum troponin and viral RNA titration, and microarray to identify the biomarker candidates that can discriminate the 3 phases. Using C3H mice infected with Theiler's murine encephalomyelitis virus on 4, 7, and 60 days post infection, we conducted bioinformatics analyses, including principal component analysis and k-means clustering of microarray data, because our traditional cardiac and serum assays, including 2-way comparison of microarray data, did not lead to the identification of a single biomarker. Principal component analysis separated heart samples clearly between the groups of 4, 7, and 60 days post infection. Representative genes contributing to the separation were as follows: 4 and 7 days post infection, innate immunity-related genes, such as Irf7 and Cxcl9; 7 and 60 days post infection, acquired immunity-related genes, such as Cd3g and H2-Aa; and cardiac remodeling-related genes, such as Mmp12 and Gpnmb. CONCLUSIONS Sets of molecules, not single molecules, identified by unsupervised principal component analysis, were found to be useful as phase-specific biomarkers.
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Affiliation(s)
- Seiichi Omura
- From the Departments of Microbiology and Immunology (S.O., E.K., F.S., N.E.M., I.T.) and Molecular and Cellular Physiology (G.V.C., J.S.A.), Louisiana State University Health Sciences Center, Shreveport; and Department of Computer Science, Louisiana State University Shreveport (P.A.R., U.C., M.T.)
| | - Eiichiro Kawai
- From the Departments of Microbiology and Immunology (S.O., E.K., F.S., N.E.M., I.T.) and Molecular and Cellular Physiology (G.V.C., J.S.A.), Louisiana State University Health Sciences Center, Shreveport; and Department of Computer Science, Louisiana State University Shreveport (P.A.R., U.C., M.T.)
| | - Fumitaka Sato
- From the Departments of Microbiology and Immunology (S.O., E.K., F.S., N.E.M., I.T.) and Molecular and Cellular Physiology (G.V.C., J.S.A.), Louisiana State University Health Sciences Center, Shreveport; and Department of Computer Science, Louisiana State University Shreveport (P.A.R., U.C., M.T.)
| | - Nicholas E Martinez
- From the Departments of Microbiology and Immunology (S.O., E.K., F.S., N.E.M., I.T.) and Molecular and Cellular Physiology (G.V.C., J.S.A.), Louisiana State University Health Sciences Center, Shreveport; and Department of Computer Science, Louisiana State University Shreveport (P.A.R., U.C., M.T.)
| | - Ganta V Chaitanya
- From the Departments of Microbiology and Immunology (S.O., E.K., F.S., N.E.M., I.T.) and Molecular and Cellular Physiology (G.V.C., J.S.A.), Louisiana State University Health Sciences Center, Shreveport; and Department of Computer Science, Louisiana State University Shreveport (P.A.R., U.C., M.T.)
| | - Phoebe A Rollyson
- From the Departments of Microbiology and Immunology (S.O., E.K., F.S., N.E.M., I.T.) and Molecular and Cellular Physiology (G.V.C., J.S.A.), Louisiana State University Health Sciences Center, Shreveport; and Department of Computer Science, Louisiana State University Shreveport (P.A.R., U.C., M.T.)
| | - Urska Cvek
- From the Departments of Microbiology and Immunology (S.O., E.K., F.S., N.E.M., I.T.) and Molecular and Cellular Physiology (G.V.C., J.S.A.), Louisiana State University Health Sciences Center, Shreveport; and Department of Computer Science, Louisiana State University Shreveport (P.A.R., U.C., M.T.)
| | - Marjan Trutschl
- From the Departments of Microbiology and Immunology (S.O., E.K., F.S., N.E.M., I.T.) and Molecular and Cellular Physiology (G.V.C., J.S.A.), Louisiana State University Health Sciences Center, Shreveport; and Department of Computer Science, Louisiana State University Shreveport (P.A.R., U.C., M.T.)
| | - J Steven Alexander
- From the Departments of Microbiology and Immunology (S.O., E.K., F.S., N.E.M., I.T.) and Molecular and Cellular Physiology (G.V.C., J.S.A.), Louisiana State University Health Sciences Center, Shreveport; and Department of Computer Science, Louisiana State University Shreveport (P.A.R., U.C., M.T.)
| | - Ikuo Tsunoda
- From the Departments of Microbiology and Immunology (S.O., E.K., F.S., N.E.M., I.T.) and Molecular and Cellular Physiology (G.V.C., J.S.A.), Louisiana State University Health Sciences Center, Shreveport; and Department of Computer Science, Louisiana State University Shreveport (P.A.R., U.C., M.T.).
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Martinez NE, Karlsson F, Sato F, Kawai E, Omura S, Minagar A, Grisham MB, Tsunoda I. Protective and detrimental roles for regulatory T cells in a viral model for multiple sclerosis. Brain Pathol 2014; 24:436-51. [PMID: 24417588 DOI: 10.1111/bpa.12119] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [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: 10/23/2013] [Accepted: 01/07/2014] [Indexed: 02/06/2023] Open
Abstract
Multiple sclerosis (MS) has been proposed to be an immune-mediated disease in the central nervous system (CNS) that can be triggered by virus infections. In Theiler's murine encephalomyelitis virus (TMEV) infection, during the first week (acute stage), mice develop polioencephalomyelitis. After 3 weeks (chronic stage), mice develop immune-mediated demyelination with virus persistence, which has been used as a viral model for MS. Regulatory T cells (Tregs) can suppress inflammation, and have been suggested to be protective in immune-mediated diseases, including MS. However, in virus-induced inflammatory demyelination, although Tregs can suppress inflammation, preventing immune-mediated pathology, Tregs may also suppress antiviral immune responses, leading to more active viral replication and/or persistence. To determine the role and potential translational usage of Tregs in MS, we treated TMEV-infected mice with ex vivo generated induced Tregs (iTregs) on day 0 (early) or during the chronic stage (therapeutic). Early treatment worsened clinical signs during acute disease. The exacerbation of acute disease was associated with increased virus titers and decreased immune cell recruitment in the CNS. Therapeutic iTreg treatment reduced inflammatory demyelination during chronic disease. Immunologically, iTreg treatment increased interleukin-10 production from B cells, CD4(+) T cells and dendritic cells, which may contribute to the decreased CNS inflammation.
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Affiliation(s)
- Nicholas E Martinez
- Department of Microbiology and Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health Sciences Center, Shreveport, LA
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Fernando V, Omura S, Sato F, Kawai E, Martinez NE, Elliott SF, Yoh K, Takahashi S, Tsunoda I. Regulation of an autoimmune model for multiple sclerosis in Th2-biased GATA3 transgenic mice. Int J Mol Sci 2014; 15:1700-18. [PMID: 24463292 DOI: 10.3390/ijms15021700] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 01/11/2014] [Accepted: 01/14/2014] [Indexed: 02/05/2023] Open
Abstract
T helper (Th)2 cells have been proposed to play a neuroprotective role in multiple sclerosis (MS). This is mainly based on “loss-of-function” studies in an animal model for MS, experimental autoimmune encephalomyelitis (EAE), using blocking antibodies against Th2 related cytokines, and knockout mice lacking Th2-related molecules. We tested whether an increase of Th2 responses (“gain-of-function” approach) could alter EAE, the approach of novel GATA binding protein 3 (GATA3)-transgenic (tg) mice that overexpress GATA3, a transcription factor required for Th2 differentiation. In EAE induced with myelin oligodendrocyte glycoprotein (MOG)35–55 peptide, GATA3-tg mice had a significantly delayed onset of disease and a less severe maximum clinical score, compared with wild-type C57BL/6 mice. Histologically, GATA3-tg mice had decreased levels of meningitis and demyelination in the spinal cord, and anti-inflammatory cytokine profiles immunologically, however both groups developed similar levels of MOG-specific lymphoproliferative responses. During the early stage, we detected higher levels of interleukin (IL)-4 and IL-10, with MOG and mitogen stimulation of regional lymph node cells in GATA3-tg mice. During the late stage, only mitogen stimulation induced higher IL-4 and lower interferon-γ and IL-17 production in GATA3-tg mice. These results suggest that a preexisting bias toward a Th2 immune response may reduce the severity of inflammatory demyelinating diseases, including MS.
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Chaitanya GV, Omura S, Sato F, Martinez NE, Minagar A, Ramanathan M, Guttman BW, Zivadinov R, Tsunoda I, Alexander JS. Inflammation induces neuro-lymphatic protein expression in multiple sclerosis brain neurovasculature. J Neuroinflammation 2013; 10:125. [PMID: 24124909 PMCID: PMC3854084 DOI: 10.1186/1742-2094-10-125] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [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: 07/10/2013] [Accepted: 09/24/2013] [Indexed: 02/08/2023] Open
Abstract
Background Multiple sclerosis (MS) is associated with ectopic lymphoid follicle formation. Podoplanin+ (lymphatic marker) T helper17 (Th17) cells and B cell aggregates have been implicated in the formation of tertiary lymphoid organs (TLOs) in MS and experimental autoimmune encephalitis (EAE). Since podoplanin expressed by Th17 cells in MS brains is also expressed by lymphatic endothelium, we investigated whether the pathophysiology of MS involves inductions of lymphatic proteins in the inflamed neurovasculature. Methods We assessed the protein levels of lymphatic vessel endothelial hyaluronan receptor and podoplanin, which are specific to the lymphatic system and prospero-homeobox protein-1, angiopoietin-2, vascular endothelial growth factor-D, vascular endothelial growth factor receptor-3, which are expressed by both lymphatic endothelium and neurons. Levels of these proteins were measured in postmortem brains and sera from MS patients, in the myelin proteolipid protein (PLP)-induced EAE and Theiler’s murine encephalomyelitis virus (TMEV) induced demyelinating disease (TMEV-IDD) mouse models and in cell culture models of inflamed neurovasculature. Results and conclusions Intense staining for LYVE-1 was found in neurons of a subset of MS patients using immunohistochemical approaches. The lymphatic protein, podoplanin, was highly expressed in perivascular inflammatory lesions indicating signaling cross-talks between inflamed brain vasculature and lymphatic proteins in MS. The profiles of these proteins in MS patient sera discriminated between relapsing remitting MS from secondary progressive MS and normal patients. The in vivo findings were confirmed in the in vitro cell culture models of neuroinflammation.
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Affiliation(s)
- Ganta Vijay Chaitanya
- Department of Molecular & Cellular Physiology, School of Medicine, Louisiana State University Health-Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA.
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Abstract
The role of the venous system in the pathogenesis of inflammatory neurological/neurodegenerative diseases remains largely unknown and underinvestigated. Aside from cerebral venous infarcts, thromboembolic events, and cerebrovascular bleeding, several inflammatory central nervous system (CNS) diseases, such as multiple sclerosis (MS), acute disseminated encephalomyelitis (ADEM), and optic neuritis, appear to be associated with venous vascular dysfunction, and the neuropathologic hallmark of these diseases is a perivenous, rather than arterial, lesion. Such findings raise fundamental questions about the nature of these diseases, such as the reasons why their pathognomonic lesions do not develop around the arteries and what exactly are the roles of cerebral venous inflammation in their pathogenesis. Apart from this inflammatory-based view, a new hypothesis with more focus on the hemodynamic features of the cerebral and extracerebral venous system suggests that MS pathophysiology might be associated with the venous system that drains the CNS. Such a hypothesis, if proven correct, opens new therapeutic windows in MS and other neuroinflammatory diseases. Here, we present a comprehensive review of the pathophysiology of MS, ADEM, pseudotumor cerebri, and optic neuritis, with an emphasis on the roles of venous vascular system programming and dysfunction in their pathogenesis. We consider the fundamental differences between arterial and venous endothelium, their dissimilar responses to inflammation, and the potential theoretical contributions of venous insufficiency in the pathogenesis of neurovascular diseases.
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Affiliation(s)
- Jonathan S Alexander
- Department of Molecular and Cellular Physiology, LSU Health Sciences Center, 1501 Kings Highway, Shreveport, LA 71130-3932, USA.
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Sato F, Martinez NE, Shahid M, Rose JW, Carlson NG, Tsunoda I. Resveratrol exacerbates both autoimmune and viral models of multiple sclerosis. Am J Pathol 2013; 183:1390-6. [PMID: 24091251 DOI: 10.1016/j.ajpath.2013.07.006] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Revised: 07/10/2013] [Accepted: 07/15/2013] [Indexed: 02/07/2023]
Abstract
The polyphenol compound resveratrol is reported to have multiple functions, including neuroprotection, and no major adverse effects have been reported. Although the neuroprotective effects have been associated with sirtuin 1 activation by resveratrol, the mechanisms by which resveratrol exerts such functions are a matter of controversy. We examined whether resveratrol can be neuroprotective in two models of multiple sclerosis: experimental autoimmune encephalomyelitis (EAE) and Theiler's murine encephalomyelitis virus-induced demyelinating disease (TMEV-IDD). EAE was induced in C57BL/6 mice, which were fed a control diet or a diet containing resveratrol during either the induction or effector phase or through the whole course of EAE. SJL/J mice were infected with TMEV and fed a control diet or a diet containing resveratrol during the chronic phase of TMEV-IDD. In EAE, all groups of mice treated with resveratrol had more severe clinical signs than the control group. In particular, resveratrol treatment during the induction phase resulted in the most severe EAE, both clinically and histologically. Similarly, in the viral model, the mice treated with resveratrol developed significantly more severe TMEV-IDD than the control group. Thus, surprisingly, the resveratrol treatment significantly exacerbated demyelination and inflammation without neuroprotection in the central nervous system in both models. Our findings indicate that caution should be exercised in potential therapeutic applications of resveratrol in human inflammatory demyelinating diseases, including multiple sclerosis.
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