Hepatitis B virus (HBV) core antigen-specific regulatory T cells confer sustained remission to anti-HBV therapy in chronic hepatitis B with acute exacerbation

Abstract Acute exacerbations (AEs) of chronic hepatitis B (CH-B) are thought to be the result of breakdown of immune tolerance on the natural history of chronic hepatitis B virus (HBV) infection. Immune tolerance to HBV maintained in CH-B patients without hepatitis is under the control of the host&#...

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Veröffentlicht in:Human immunology 2011-09, Vol.72 (9), p.687-698
Hauptverfasser: Koay, Lok-Beng, Feng, I-Che, Sheu, Ming-Jen, Kuo, Hsing-Tao, Lin, Chin-Yih, Chen, Jyh-Jou, Wang, Shih-Ling, Tang, Ling-Yu, Tsai, Sun-Lung
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container_issue 9
container_start_page 687
container_title Human immunology
container_volume 72
creator Koay, Lok-Beng
Feng, I-Che
Sheu, Ming-Jen
Kuo, Hsing-Tao
Lin, Chin-Yih
Chen, Jyh-Jou
Wang, Shih-Ling
Tang, Ling-Yu
Tsai, Sun-Lung
description Abstract Acute exacerbations (AEs) of chronic hepatitis B (CH-B) are thought to be the result of breakdown of immune tolerance on the natural history of chronic hepatitis B virus (HBV) infection. Immune tolerance to HBV maintained in CH-B patients without hepatitis is under the control of the host's forkhead box p3-expressing regulatory T cells (Tregs). Its breakdown mimics the occurrence of autoimmune diseases. Severe AEs may lead to liver decompensation and mortalities. Consequently, AEs are currently the major therapeutic targets in patient treatment. In this study, we employed the SYFPEITHI scoring system to identify epitopes on HBV core antigen (HBcAg) for the construction of human leukocyte antigen class II tetramers to measure HBcAg-specific Treg frequencies (Tregf). Upregulation of Treg gene profiling accompanied by increased HBcAg-specific Tregf was detected in AE patients with sustained remission (SR) to anti-HBV therapy. Depletion of Tregs from peripheral blood mononuclear cells enhanced proliferation to HBcAg. HBcAg-specific Treg clones inhibited the killing capacity of cytotoxic T lymphocyte clones in an antigen-independent manner. A greater posttherapy increase in HBcAg-specific Tregf correlated with a higher SR rate to anti-HBV therapy. These results suggest that HBcAg-specific Tregs function as suppressor effectors and confer SR to anti-HBV therapy.
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Immune tolerance to HBV maintained in CH-B patients without hepatitis is under the control of the host's forkhead box p3-expressing regulatory T cells (Tregs). Its breakdown mimics the occurrence of autoimmune diseases. Severe AEs may lead to liver decompensation and mortalities. Consequently, AEs are currently the major therapeutic targets in patient treatment. In this study, we employed the SYFPEITHI scoring system to identify epitopes on HBV core antigen (HBcAg) for the construction of human leukocyte antigen class II tetramers to measure HBcAg-specific Treg frequencies (Tregf). Upregulation of Treg gene profiling accompanied by increased HBcAg-specific Tregf was detected in AE patients with sustained remission (SR) to anti-HBV therapy. Depletion of Tregs from peripheral blood mononuclear cells enhanced proliferation to HBcAg. HBcAg-specific Treg clones inhibited the killing capacity of cytotoxic T lymphocyte clones in an antigen-independent manner. 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Immune tolerance to HBV maintained in CH-B patients without hepatitis is under the control of the host's forkhead box p3-expressing regulatory T cells (Tregs). Its breakdown mimics the occurrence of autoimmune diseases. Severe AEs may lead to liver decompensation and mortalities. Consequently, AEs are currently the major therapeutic targets in patient treatment. In this study, we employed the SYFPEITHI scoring system to identify epitopes on HBV core antigen (HBcAg) for the construction of human leukocyte antigen class II tetramers to measure HBcAg-specific Treg frequencies (Tregf). Upregulation of Treg gene profiling accompanied by increased HBcAg-specific Tregf was detected in AE patients with sustained remission (SR) to anti-HBV therapy. Depletion of Tregs from peripheral blood mononuclear cells enhanced proliferation to HBcAg. HBcAg-specific Treg clones inhibited the killing capacity of cytotoxic T lymphocyte clones in an antigen-independent manner. 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Immune tolerance to HBV maintained in CH-B patients without hepatitis is under the control of the host's forkhead box p3-expressing regulatory T cells (Tregs). Its breakdown mimics the occurrence of autoimmune diseases. Severe AEs may lead to liver decompensation and mortalities. Consequently, AEs are currently the major therapeutic targets in patient treatment. In this study, we employed the SYFPEITHI scoring system to identify epitopes on HBV core antigen (HBcAg) for the construction of human leukocyte antigen class II tetramers to measure HBcAg-specific Treg frequencies (Tregf). Upregulation of Treg gene profiling accompanied by increased HBcAg-specific Tregf was detected in AE patients with sustained remission (SR) to anti-HBV therapy. Depletion of Tregs from peripheral blood mononuclear cells enhanced proliferation to HBcAg. HBcAg-specific Treg clones inhibited the killing capacity of cytotoxic T lymphocyte clones in an antigen-independent manner. A greater posttherapy increase in HBcAg-specific Tregf correlated with a higher SR rate to anti-HBV therapy. These results suggest that HBcAg-specific Tregs function as suppressor effectors and confer SR to anti-HBV therapy.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>21215784</pmid><doi>10.1016/j.humimm.2010.11.001</doi><tpages>12</tpages></addata></record>
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ispartof Human immunology, 2011-09, Vol.72 (9), p.687-698
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subjects Allergy and Immunology
Antiviral Agents - therapeutic use
Autoimmune diseases
Cell Proliferation
Chronic hepatitis B
Chronic infection
Core protein
Cytotoxicity
Cytotoxicity, Immunologic
Epitope Mapping
Epitopes
Epitopes - metabolism
Forkhead protein
Forkhead Transcription Factors - biosynthesis
Gene profiling
Hepatitis B
Hepatitis B Core Antigens - immunology
Hepatitis B Core Antigens - metabolism
Hepatitis B virus
Hepatitis B virus - immunology
Hepatitis B virus - pathogenicity
Hepatitis B, Chronic - drug therapy
Hepatitis B, Chronic - immunology
Hepatitis B, Chronic - physiopathology
Histocompatibility antigen HLA
Histocompatibility Antigens Class II - metabolism
HLA-class II tetramer
Humans
Immunological tolerance
Immunoregulation
Immunosuppression
Liver
Liver Failure
Lymphocytes T
Mortality
Peripheral blood mononuclear cells
Protein Binding
Regulatory T-cell clone
Remission
Remission Induction
SYFPEITHI score
T-Cell Antigen Receptor Specificity
T-Lymphocyte Subsets - immunology
T-Lymphocyte Subsets - metabolism
T-Lymphocyte Subsets - pathology
T-Lymphocyte Subsets - virology
T-Lymphocytes, Regulatory - immunology
T-Lymphocytes, Regulatory - metabolism
T-Lymphocytes, Regulatory - pathology
T-Lymphocytes, Regulatory - virology
title Hepatitis B virus (HBV) core antigen-specific regulatory T cells confer sustained remission to anti-HBV therapy in chronic hepatitis B with acute exacerbation
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