title: Regulation of B7-H1 expression on peripheral monocytes and IFN-γ secretion in T lymphocytes by HBeAg.
abstract: This study is to observe the expression of B7-H1, PD-1 and TLR2 on peripheral blood monocytes (PBMCs) regulated by HBeAg in chronic hepatitis B (CHB), and to illustrate the relation between HBeAg and persistent infection of HBV. In both CHB patients and healthy controls, the expression of B7-H7 was significantly increased on CD14(+) monocytes incubated with HBeAg, while that of TLR2 was significantly reduced; the expression of specific IFN-γ was significantly decreased in CD3(+)CD4(+) T lymphocytes incubated with HBeAg, while IL-6 and IL-10 in conditioned media were significantly increased. HBeAg is able to significantly up-regulate B7-H1, down-regulate TLR2 on monocytes, reduce IFN-γ produced by T lymphocytes and increase Th2-type cytokines secretion. These findings suggest that HBeAg suppresses the specific cellular immunity to clear the virus, and eventually lead to immune tolerance to HBV infection. Therefore, HBeAg plays an important role in immune suppression in chronic HBV patients.
authors.affiliation: Department of Infectious Diseases, The First Affiliated Hospital with Nanjing Medical University, Nanjing 210029, China.
authors.forename: Yaping
authors.initials: Y
authors.lastname: Han
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Longfeng
authors.initials: L
authors.lastname: Jiang
authors.forename: Qingqing
authors.initials: Q
authors.lastname: Xu
authors.forename: Bo
authors.initials: B
authors.lastname: Liu
authors.forename: Ke
authors.initials: K
authors.lastname: Jin
authors.forename: Yuan
authors.initials: Y
authors.lastname: Liu
authors.forename: Zuhu
authors.initials: Z
authors.lastname: Huang
mesh_terms: D000293:Adolescent; D000328:Adult; D060890:B7-H1 Antigen / Q000096:biosynthesis*; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology* / Q000378:metabolism; D005260:Female; D006513:Hepatitis B e Antigens / Q000276:immunology*; D019694:Hepatitis B, Chronic / Q000276:immunology* / Q000378:metabolism; D006801:Humans; D007108:Immune Tolerance / Q000276:immunology; D007371:Interferon-gamma / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D009000:Monocytes / Q000276:immunology / Q000378:metabolism*; D055815:Young Adult
chemical_list: D060890:B7-H1 Antigen; D006513:Hepatitis B e Antigens; D007371:Interferon-gamma
keywords: B7-H1; Hepatitis B virus E antigen; Innate immunity; Monocyte; PD-1; Regulate; Toll-like receptors 2