title: Cytotoxic T lymphocyte responses to Marek's disease herpesvirus-encoded glycoproteins.
abstract: Cell-mediated immune responses are important for protective immunity to Marek's disease (MD), especially because MD herpesvirus (MDV) infection is strictly cell-associated in chickens with the exception of the feather follicle epithelium. A system previously developed using reticuloendotheliosis (REV)-transformed cell lines stably expressing individual MDV genes allows the determination of relevant MDV proteins for the induction of cytotoxic T lymphocyte (CTL) responses. To examine the importance of glycoproteins for the induction of CTL, the MDV genes coding for glycoproteins (g) C, D, E, H, I, K, L, and M were stably transfected into the REV-transformed chicken cell lines RECC-CU205 (major histocompatibility complex (MHC): B(21)B(21)) and RECC-CU91 (MHC: B(19)B(19)). All transfected cell lines were lysed by REV-sensitized, syngeneic splenocytes obtained from MD-resistant N2a (MHC: B(21)B(21)) and MD-susceptible P2a (MHC: B(19)B(19)) chickens, indicating that the expression of individual MDV glycoproteins did not interfere with antigen processing pathways. Only cell lines expressing gI were recognized by CTL from both N2a and P2a MDV-infected chickens. Cell lines expressing glycoproteins gC and gK, and to a lesser extent, gH, gL, and gM were lysed by syngeneic MDV-sensitized splenocytes from N2a birds but not P2a birds. In contrast, gE was recognized by MDV-sensitized effector cells from the P2a line and not the N2a line. Glycoprotein D was not recognized by either line, with the exception of one marginally significant P2a assay. These results indicate that late viral glycoproteins are relevant for the induction of cell-mediated immunity during MDV infection.
authors.affiliation: Department of Microbiology and Immunology, Unit of Avian Health, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
authors.forename: Carrie J
authors.initials: CJ
authors.lastname: Markowski-Grimsrud
authors.forename: Karel A
authors.initials: KA
authors.lastname: Schat
mesh_terms: D000818:Animals; D002460:Cell Line; D002642:Chick Embryo; D002645:Chickens / Q000276:immunology* / Q000821:virology*; D003602:Cytotoxicity, Immunologic / Q000276:immunology; D015870:Gene Expression; D006023:Glycoproteins / Q000235:genetics / Q000276:immunology*; D008381:Herpesvirus 2, Gallid / Q000235:genetics / Q000276:immunology*; D008380:Marek Disease / Q000276:immunology* / Q000821:virology; D011201:Poultry Diseases / Q000276:immunology; D013047:Specific Pathogen-Free Organisms; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*; D014764:Viral Proteins / Q000235:genetics / Q000276:immunology*
chemical_list: D006023:Glycoproteins; D014764:Viral Proteins