title: Effect of regulatory T cells and adherent cells on the expansion of HBcAg-specific CD8+ T cells in patients with chronic hepatitis B virus infection.
abstract: Patients with chronic HBV infection show poor immune response to HBV-specific CD8+ T cells. Several studies demonstrate that regulatory T cells (Treg) and dendritic cells (DC) are important to maintain peripheral immune tolerance. In this study, we investigated the effects of CD4+CD25+Treg and/or the adherent cells (AC) on the proliferation of HBc18-27-specific CD8+ T cells (c18-27-CD8Ts) in response to in vitro stimulation. The frequency of c18-27-CD8Ts in four different mixed leukocyte reactions (MLRs) were analyzed using an HLA-A2-HBc18-27 tetramer. The data indicated that the median percentage of c18-27-CD8Ts in four different MLRs were significant difference in patients with chronic HBV infection. Our results showed that Treg and/or AC might suppress the frequency of HBc18-27-specific CD8+ T cell proliferation in response to in vitro stimulation in chronic HBV patients, and AC might be more effective than Treg.
authors.affiliation: Department of Laboratory Medicine, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
authors.forename: Xuefen
authors.initials: X
authors.lastname: Li
authors.forename: Yu
authors.initials: Y
authors.lastname: Chen
authors.forename: Zhaowen
authors.initials: Z
authors.lastname: Ma
authors.forename: Bo
authors.initials: B
authors.lastname: Ye
authors.forename: Wei
authors.initials: W
authors.lastname: Wu
authors.forename: Lanjuan
authors.initials: L
authors.lastname: Li
mesh_terms: D000328:Adult; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology / Q000378:metabolism* / Q000473:pathology; D002448:Cell Adhesion; D002450:Cell Communication; D002452:Cell Count; D002460:Cell Line; D049109:Cell Proliferation; D005260:Female; D015789:HLA-A2 Antigen / Q000378:metabolism; D006512:Hepatitis B Core Antigens / Q000276:immunology* / Q000378:metabolism; D006515:Hepatitis B virus / Q000276:immunology* / Q000472:pathogenicity; D019694:Hepatitis B, Chronic / Q000276:immunology*; D006801:Humans; D056747:Immunomodulation; D008297:Male; D008875:Middle Aged; D010446:Peptide Fragments / Q000276:immunology* / Q000378:metabolism; D050378:T-Lymphocytes, Regulatory / Q000276:immunology / Q000378:metabolism* / Q000473:pathology
chemical_list: D015789:HLA-A2 Antigen; D006512:Hepatitis B Core Antigens; D010446:Peptide Fragments