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Hughes EP, Syage AR, Mehrabad EM, Lane TE, Spike BT, Tantin D. OCA-B promotes autoimmune demyelination through control of stem-like CD4 + T cells. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.11.29.569210. [PMID: 38076925 PMCID: PMC10705450 DOI: 10.1101/2023.11.29.569210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Stem-like T cell populations can selectively contribute to autoimmunity, but the activities that promote and sustain these populations are incompletely understood. Here, we show that T cell-intrinsic loss of the transcription cofactor OCA-B protects mice from experimental autoimmune encephalomyelitis (EAE) while preserving responses to CNS infection. In adoptive transfer EAE models driven by multiple antigen encounters, OCA-B deletion nearly eliminates CNS infiltration, proinflammatory cytokine production and clinical disease. OCA-B-expressing CD4 + T cells within the CNS of mice with EAE comprise a minority of the population but display a memory phenotype and preferentially confer disease. In a relapsing-remitting EAE model, OCA-B T cell deficiency specifically protects mice from relapse. During remission, OCA-B promotes the expression of Tcf7 , Slamf6 , and Sell in proliferating T cell populations. At relapse, OCA-B loss results in both the accumulation of an immunomodulatory CD4 + T cell population expressing Ccr9 and Bach2 , and the loss of pro-inflammatory gene expression from Th17 cells. These results identify OCA-B as a driver of pathogenic stem-like T cells.
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Ma Y, Deng X, Zhou L, Dong H, Xu P. HSV-1 selectively packs the transcription factor Oct-1 into EVs to facilitate its infection. Front Microbiol 2023; 14:1205906. [PMID: 37396389 PMCID: PMC10309031 DOI: 10.3389/fmicb.2023.1205906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 05/26/2023] [Indexed: 07/04/2023] Open
Abstract
HSV-1 hijacks the cellular vesicular secretion system and promotes the secretion of extracellular vesicles (EVs) from infected cells. This is believed to facilitate the maturation, secretion, intracellular transportation and immune evasion of the virus. Intriguingly, previous studies have shown that noninfectious EVs from HSV-1-infected cells exert antiviral effects on HSV-1 and have identified host restrictive factors, such as STING, CD63, and Sp100 packed in these lipid bilayer-enclosed vesicles. Octamer-binding transcription factor-1 (Oct-1) is shown here to be a pro-viral cargo in non-virion-containing EVs during HSV-1 infection and serves to facilitate virus dissemination. Specifically, during HSV-1 infection, the nuclear localized transcription factor Oct-1 displayed punctate cytosolic staining that frequently colocalized with VP16 and was increasingly secreted into the extracellular space. HSV-1 grown in cells bereft of Oct-1 (Oct-1 KO) was significantly less efficient at transcribing viral genes during the next round of infection. In fact, HSV-1 promoted increased exportation of Oct-1 in non-virion-containing EVs, but not the other VP16-induced complex (VIC) component HCF-1, and EV-associated Oct-1 was promptly imported into the nucleus of recipient cells to facilitate the next round of HSV-1 infection. Interestingly, we also found that EVs from HSV-1-infected cells primed cells for infection by another RNA virus, vesicular stomatitis virus. In summary, this investigation reports one of the first pro-viral host proteins packed into EVs during HSV-1 infection and underlines the heterogenetic nature and complexity of these noninfectious double-lipid particles.
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Scott MA, Woolums AR, Karisch BB, Harvey KM, Capik SF. Impact of preweaning vaccination on host gene expression and antibody titers in healthy beef calves. Front Vet Sci 2022; 9:1010039. [PMID: 36225796 PMCID: PMC9549141 DOI: 10.3389/fvets.2022.1010039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 08/25/2022] [Indexed: 11/13/2022] Open
Abstract
The impact of preweaning vaccination for bovine respiratory viruses on cattle health and subsequent bovine respiratory disease morbidity has been widely studied yet questions remain regarding the impact of these vaccines on host response and gene expression. Six randomly selected calves were vaccinated twice preweaning (T1 and T3) with a modified live vaccine for respiratory pathogens and 6 randomly selected calves were left unvaccinated. Whole blood samples were taken at first vaccination (T1), seven days later (T2), at revaccination and castration (T3), and at weaning (T4), and utilized for RNA isolation and sequencing. Serum from T3 and T4 was analyzed for antibodies to BRSV, BVDV1a, and BHV1. Sequenced RNA for all 48 samples was bioinformatically processed with a HISAT2/StringTie pipeline, utilizing reference guided assembly with the ARS-UCD1.2 bovine genome. Differentially expressed genes were identified through analyzing the impact of time across all calves, influence of vaccination across treatment groups at each timepoint, and the interaction of time and vaccination. Calves, regardless of vaccine administration, demonstrated an increase in gene expression over time related to specialized proresolving mediator production, lipid metabolism, and stimulation of immunoregulatory T-cells. Vaccination was associated with gene expression related to natural killer cell activity and helper T-cell differentiation, enriching for an upregulation in Th17-related gene expression, and downregulated genes involved in complement system activity and coagulation mechanisms. Type-1 interferon production was unaffected by the influence of vaccination nor time. To our knowledge, this is the first study to evaluate mechanisms of vaccination and development in healthy calves through RNA sequencing analysis.
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Affiliation(s)
- Matthew A. Scott
- Veterinary Education, Research, and Outreach Center, Texas A&M University and West Texas A&M University, Canyon, TX, United States
- *Correspondence: Matthew A. Scott
| | - Amelia R. Woolums
- Department of Pathobiology and Population Medicine, Mississippi State University, Mississippi State, MS, United States
| | - Brandi B. Karisch
- Department of Animal and Dairy Sciences, Mississippi State University, Mississippi State, MS, United States
| | - Kelsey M. Harvey
- Prairie Research Unit, Mississippi State University, Prairie, MS, United States
| | - Sarah F. Capik
- Texas A&M AgriLife Research, Texas A&M University System, Amarillo, TX, United States
- Department of Veterinary Pathobiology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, United States
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Hu L, Zhou Y, Yang J, Zhao X, Mao L, Zheng W, Zhao J, Guo M, Chen C, He Z, Xu L. MicroRNA-7 overexpression positively regulates the CD8 + SP cell development via targeting PIK3R1. Exp Cell Res 2021; 407:112824. [PMID: 34516985 DOI: 10.1016/j.yexcr.2021.112824] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 08/22/2021] [Accepted: 09/04/2021] [Indexed: 12/21/2022]
Abstract
microRNA-7 (miR-7), a distinct miRNA family member, has been reported to be involved in the biological functions of immune cells. However, the potential role of miR-7 in the CD8+ T cell development remains to be elucidated. In this study, we estimated the potential effects of miR-7 overexpression in the thymic CD8+ SP cell development using miR-7 overexpression mice. Our results showed that compared with those in control wild type (WT) mice, the volume, weight and total cell numbers of thymus in miR-7 overexpression (OE) mice increased significantly. The absolute cell number of CD8+ SP cells in miR-7 OE mice increased and its ability of activation and proliferation enhanced. Futhermore, we clarified that miR-7 overexpression had an intrinsic promote role in CD8+ SP cell development by adoptive cell transfer assay. Mechanistically, the expression level of PIK3R1, a target of miR-7, decreased significantly in CD8+ SP cells of miR-7 OE mice. Moreover, the expression level of phosphorylated (p)-AKT and p-ERK changed inversely and indicating that miR-7 overexpression impaired the balance of AKE and ERK pathways. In summary, our work reveals an essential role of miR-7 in promoting CD8+ SP cell development through the regulation of PIK3R1 and balance of AKT and ERK pathways.
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Affiliation(s)
- Lin Hu
- Special Key Laboratory of Gene Detection & Therapy of Guizhou Provincial Education Department, Guizhou, 563000, China; Department of Immunology & Talent Base of Biological Therapy of Guizhou Province, Zunyi Medical University, Guizhou, 563000, China
| | - Ya Zhou
- Special Key Laboratory of Gene Detection & Therapy of Guizhou Provincial Education Department, Guizhou, 563000, China; Department of Medical Physics, Zunyi Medical University, Zunyi, Guizhou, 563003, China
| | - Jing Yang
- Special Key Laboratory of Gene Detection & Therapy of Guizhou Provincial Education Department, Guizhou, 563000, China; Department of Immunology & Talent Base of Biological Therapy of Guizhou Province, Zunyi Medical University, Guizhou, 563000, China
| | - Xu Zhao
- Special Key Laboratory of Gene Detection & Therapy of Guizhou Provincial Education Department, Guizhou, 563000, China; Department of Immunology & Talent Base of Biological Therapy of Guizhou Province, Zunyi Medical University, Guizhou, 563000, China
| | - Ling Mao
- Special Key Laboratory of Gene Detection & Therapy of Guizhou Provincial Education Department, Guizhou, 563000, China; Department of Immunology & Talent Base of Biological Therapy of Guizhou Province, Zunyi Medical University, Guizhou, 563000, China
| | - Wen Zheng
- Department of Laboratory Medicine, Qiannan Medical University for Nationalities, Guizhou 558000, China
| | - Juanjuan Zhao
- Special Key Laboratory of Gene Detection & Therapy of Guizhou Provincial Education Department, Guizhou, 563000, China; Department of Immunology & Talent Base of Biological Therapy of Guizhou Province, Zunyi Medical University, Guizhou, 563000, China
| | - Mengmeng Guo
- Special Key Laboratory of Gene Detection & Therapy of Guizhou Provincial Education Department, Guizhou, 563000, China; Department of Immunology & Talent Base of Biological Therapy of Guizhou Province, Zunyi Medical University, Guizhou, 563000, China
| | - Chao Chen
- Special Key Laboratory of Gene Detection & Therapy of Guizhou Provincial Education Department, Guizhou, 563000, China; Department of Immunology & Talent Base of Biological Therapy of Guizhou Province, Zunyi Medical University, Guizhou, 563000, China
| | - Zhixu He
- Department of Paediatrics, Affiliated Hospital of Zunyi Medical University, Guizhou, 563000, China; Key Laboratory of Adult Stem Cell Transformation Research, Chinese Academy of Medical Sciences, Guizhou, 563000, China
| | - Lin Xu
- Special Key Laboratory of Gene Detection & Therapy of Guizhou Provincial Education Department, Guizhou, 563000, China; Department of Immunology & Talent Base of Biological Therapy of Guizhou Province, Zunyi Medical University, Guizhou, 563000, China.
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POU2F1 Promotes Cell Viability and Tumor Growth in Gastric Cancer through Transcriptional Activation of lncRNA TTC3-AS1. JOURNAL OF ONCOLOGY 2021; 2021:5570088. [PMID: 34257651 PMCID: PMC8260299 DOI: 10.1155/2021/5570088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 05/10/2021] [Accepted: 06/09/2021] [Indexed: 11/18/2022]
Abstract
POU domain, class 2, transcription factor 1 (POU2F1) is involved in the development of gastric cancer (GC). However, the molecular mechanism has not been fully elucidated. Here, we identified a novel lncRNA named TTC3-AS1 that was potentially regulated by POU2F1 and investigated their roles in GC progression. Bioinformatics analysis suggested that high expression of POU2F1 predicted poor prognosis in patients with GC. We further screened out an lncRNA TTC3-AS1 that may be transcriptionally activated by POU2F1 according to the JASPAR database, and POU2F1 and TTC3-AS1 were highly expressed in GC cells and tissues compared with normal controls (NCs). Function analysis revealed that both POU2F1 and TTC3-AS1 played oncogenic roles by promoting cell viability, migration, and invasion in GC. qRT-PCR analysis showed that POU2F1 improved the expression of TTC3-AS1 in GC cells, while TTC3-AS1 knockdown or overexpression had no effect on POU2F1 expression. The results of chromatin immunoprecipitation and DNA-affinity precipitation assays indicated that POU2F1 directly bound to the promoter region of TTC3-AS1 and activated its transcription. TTC3-AS1 knockdown neutralized the protumor effects of POU2F1 overexpression in GC cell lines as well as mouse models of GC, which suggested that TTC3-AS1 mediates the oncogenic function of POU2F1. In summary, POU2F1 promoted GC progression by transcriptionally activating TTC3-AS1; thus, this study provided a new perspective for the mechanism of GC progression.
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Kim H, Perovanovic J, Shakya A, Shen Z, German CN, Ibarra A, Jafek JL, Lin NP, Evavold BD, Chou DHC, Jensen PE, He X, Tantin D. Targeting transcriptional coregulator OCA-B/Pou2af1 blocks activated autoreactive T cells in the pancreas and type 1 diabetes. J Exp Med 2021; 218:e20200533. [PMID: 33295943 PMCID: PMC7731945 DOI: 10.1084/jem.20200533] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 04/27/2020] [Accepted: 10/09/2020] [Indexed: 11/04/2022] Open
Abstract
The transcriptional coregulator OCA-B promotes expression of T cell target genes in cases of repeated antigen exposure, a necessary feature of autoimmunity. We hypothesized that T cell-specific OCA-B deletion and pharmacologic OCA-B inhibition would protect mice from autoimmune diabetes. We developed an Ocab conditional allele and backcrossed it onto a diabetes-prone NOD/ShiLtJ strain background. T cell-specific OCA-B loss protected mice from spontaneous disease. Protection was associated with large reductions in islet CD8+ T cell receptor specificities associated with diabetes pathogenesis. CD4+ clones associated with diabetes were present but associated with anergic phenotypes. The protective effect of OCA-B loss was recapitulated using autoantigen-specific NY8.3 mice but diminished in monoclonal models specific to artificial or neoantigens. Rationally designed membrane-penetrating OCA-B peptide inhibitors normalized glucose levels and reduced T cell infiltration and proinflammatory cytokine expression in newly diabetic NOD mice. Together, the results indicate that OCA-B is a potent autoimmune regulator and a promising target for pharmacologic inhibition.
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MESH Headings
- Alleles
- Amino Acid Sequence
- Animals
- Autoantigens/immunology
- CD4-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/immunology
- Crosses, Genetic
- Cytokines/metabolism
- Diabetes Mellitus, Type 1/genetics
- Diabetes Mellitus, Type 1/immunology
- Diabetes Mellitus, Type 1/prevention & control
- Disease Models, Animal
- Female
- Gene Deletion
- Germ Cells/metabolism
- Humans
- Inflammation Mediators/metabolism
- Lymph Nodes/metabolism
- Lymphocyte Activation
- Male
- Mice, Inbred C57BL
- Mice, Inbred NOD
- Ovalbumin
- Pancreas/metabolism
- Pancreas/pathology
- Peptides/pharmacology
- Receptors, Antigen, T-Cell/metabolism
- Spleen/pathology
- T-Lymphocytes/immunology
- Trans-Activators/deficiency
- Trans-Activators/metabolism
- Transcription, Genetic
- Mice
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Affiliation(s)
- Heejoo Kim
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT
- Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT
| | - Jelena Perovanovic
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT
- Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT
| | - Arvind Shakya
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT
| | - Zuolian Shen
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT
- Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT
| | - Cody N German
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT
| | - Andrea Ibarra
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT
- Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT
| | - Jillian L Jafek
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT
- Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT
| | - Nai-Pin Lin
- Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT
| | - Brian D Evavold
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT
| | - Danny H-C Chou
- Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT
| | - Peter E Jensen
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT
| | - Xiao He
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT
| | - Dean Tantin
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT
- Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT
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