کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5530748 1549388 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Research paperHepatic expansion of virus-specific CD8+BTLA+ T cells with regulatory properties in chronic hepatitis B virus infection
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
پیش نمایش صفحه اول مقاله
Research paperHepatic expansion of virus-specific CD8+BTLA+ T cells with regulatory properties in chronic hepatitis B virus infection
چکیده انگلیسی


- BTLA were expressed highly on intrahepatic HBV-specific T cells from patients with chronic HBV infection.
- BTLA+ HBV-specific T cells play regulatory role.
- BTLA signaling-mediated IL-10 secretion plays a key role in suppression.

Similar to programmed death-1 (PD-1), B and T lymphocyte attenuator (BTLA) is a co-inhibitory molecule of the CD28 family. PD-1 is involved in T cell exhaustion during chronic viral infection. However, the role of BTLA in virus-specific T cells is poorly defined. Here we investigated the expression and function of BTLA in T cells from patients with chronic hepatitis B virus (HBV) infection. The phenotype of peripheral and intrahepatic HBV-specific T cells from 43 patients with chronic HBV infection was assessed by flow cytometry. Functional evaluation was analyzed by T cell expansion and cytokine secretion after different treatments. In chronic HBV patients, a subset of inefficient interferon-γ producing antigen-specific CD8+ T cells recruited to the liver expressed high BTLA levels. The BTLA+ HBV-specific CD8+ T cell suppressive function was antigen-specific, at least in the induction phase, because they were only activated by a pool of HBV peptides but not with a pool of unrelated peptides. Suppression of T cell responses was restored by a BTLA signaling blockade and neutralizing IL-10, indicating that BTLA signaling-mediated IL-10 secretion plays a key role in suppression. This study provides important evidence that there is a subset of liver infiltrated virus-specific CD8+BTLA+ regulatory T cells in patients with chronic HBV infection. This subset of cells plays a pivotal role in controlling hepatic effector CD8+ T cell responses through BTLA signaling mediated regulatory factor IL-10 production.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cellular Immunology - Volume 311, January 2017, Pages 36-45
نویسندگان
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