title: HCV-core and NS3 antigens play disparate role in inducing regulatory or effector T cells in vivo: Implications for viral persistence or clearance.
abstract: A distinguishing feature of HCV is its ability to persist in majority of the infected people. We investigated the role of HCV-core and NS3 in inducing effector T cells to mediate antiviral immunity. Our studies revealed that immunization with recombinant adenoviral vector containing HCV-core or NS3 leads to differential development of regulatory vs. effector T cells in mice, resulting in distinct outcomes of virus infection. For the first time, our studies directly demonstrate that HCV-core enhances both CD4(+) and CD8(+) T(regs) which possibly contribute to persistent infection, whereas HCV NS3 induces both CD4(+) and CD8(+) effector T cells to allow viral clearance.
authors.affiliation: Department of Surgery, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada.
authors.forename: Deepa K
authors.initials: DK
authors.lastname: Krishnadas
authors.forename: Wen
authors.initials: W
authors.lastname: Li
authors.forename: Rakesh
authors.initials: R
authors.lastname: Kumar
authors.forename: D Lorne
authors.initials: DL
authors.lastname: Tyrrell
authors.forename: Babita
authors.initials: B
authors.lastname: Agrawal
mesh_terms: D000818:Animals; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology* / Q000821:virology; D049109:Cell Proliferation; D005260:Female; D053804:Granzymes / Q000276:immunology; D006526:Hepatitis C / Q000276:immunology* / Q000517:prevention & control; D018936:Hepatitis C Antigens / Q000276:immunology*; D007371:Interferon-gamma / Q000276:immunology; D008213:Lymphocyte Activation; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D013154:Spleen / Q000166:cytology / Q000276:immunology; D016176:T-Lymphocyte Subsets / Q000276:immunology / Q000821:virology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology* / Q000821:virology; D014758:Viral Core Proteins / Q000276:immunology*; D014761:Viral Hepatitis Vaccines / Q000276:immunology; D017361:Viral Nonstructural Proteins / Q000276:immunology*; D010948:Viral Plaque Assay; D012697:Serine Endopeptidases; D043583:Nucleoside-Triphosphatase; D053487:DEAD-box RNA Helicases; D000085242:Viral Proteases
chemical_list: D053804:Granzymes; D018936:Hepatitis C Antigens; D007371:Interferon-gamma; D014758:Viral Core Proteins; D014761:Viral Hepatitis Vaccines; D017361:Viral Nonstructural Proteins; C084422:NS3 protein, hepatitis C virus; D012697:Serine Endopeptidases; D043583:Nucleoside-Triphosphatase; D053487:DEAD-box RNA Helicases; D000085242:Viral Proteases