Related Experiment Video
Updated: Jun 24, 2026

Stem Cell-Derived Viral Ag-Specific T Lymphocytes Suppress HBV Replication in Mice
Published on: September 25, 2019
Altered T cell costimulation during chronic hepatitis B infection
Luisa Barboza1, Siham Salmen, Darrell L Peterson
1Institute of Clinical Immunology, University of Los Andes, Mérida-Venezuela.
Chronic hepatitis B virus (HBV) infection impairs T-cell responses. In chronically infected patients, CD4+ T cells show reduced activation and increased IL-10, hindering viral clearance and promoting persistence.
Area of Science:
- Immunology
- Virology
- Hepatology
Background:
- Hepatitis B virus (HBV) infection leads to distinct T-cell responses in acute versus chronic disease.
- Understanding T-cell dysfunction is crucial for addressing HBV persistence.
Purpose of the Study:
- To investigate T-cell activation and cytokine profiles in chronic HBV infection.
- To compare responses between chronically infected patients (CIP) and naturally immune subjects (NIS).
Main Methods:
- Analysis of CD4+ T-cell activation markers (CD40L, CD69) and cytokine production (IL-10).
- Stimulation with hepatitis B core antigen (HBcAg) and CD28 crosslinking in vitro.
- Comparison of cellular responses between CIP and NIS groups.
Main Results:
- CD4+ T cells from CIP showed significantly lower CD40L and CD69 induction upon HBcAg stimulation compared to NIS.
- CD4+ T cells from CIP produced elevated levels of IL-10 in response to HBcAg.
- Impaired T-cell costimulation and a predominant inhibitory environment were observed in chronic HBV.
Conclusions:
- Altered T-cell costimulation and elevated IL-10 contribute to T-cell dysfunction in chronic HBV.
- These immune alterations represent a pathogenic mechanism driving viral persistence in HBV infection.
More Related Videos
11:34A Competent Hepatocyte Model Examining Hepatitis B Virus Entry through Sodium Taurocholate Cotransporting Polypeptide as a Therapeutic Target
Published on: May 10, 2022
10:37Analysis of HBV-Specific CD4 T-cell Responses and Identification of HLA-DR-Restricted CD4 T-Cell Epitopes Based on a Peptide Matrix
Published on: October 20, 2021
Related Concept Videos
Hepatitis
T Cell Activation and Clonal Selection
Naive T cells that have not yet encountered an antigen express two primary CD...
B Cell Activation and Differentiation
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
Cirrhosis II: Pathophysiology
Immunodeficiency Diseases
There are three main causes of immunodeficiency disorders...