@article{mbs:/content/journal/jgv/10.1099/vir.0.18735-0, author = "Lenfant, Françoise and Pizzato, Nathalie and Liang, Siyuan and Davrinche, Christian and Le Bouteiller, Philippe and Horuzsko, Anatolij", title = "Induction of HLA-G-restricted human cytomegalovirus pp65 (UL83)-specific cytotoxic T lymphocytes in HLA-G transgenic mice", journal= "Journal of General Virology", year = "2003", volume = "84", number = "2", pages = "307-317", doi = "https://doi.org/10.1099/vir.0.18735-0", url = "https://www.microbiologyresearch.org/content/journal/jgv/10.1099/vir.0.18735-0", publisher = "Microbiology Society", issn = "1465-2099", type = "Journal Article", abstract = "The non-classical major histocompatibility complex class I molecule HLA-G is expressed mainly by extravillous trophoblasts at the materno–foetal interface. HLA-G has been found to bind endogenously processed nonameric peptides but its function as a restriction element for a cytotoxic T cell response to viruses with tropism for trophoblastic cells has never been demonstrated. In this study, candidate viral peptides derived from human cytomegalovirus (HCMV) pp65 (UL83), which stabilized the HLA-G molecule on HLA-G-transfected T2 cells, were identified. The specific anti-pp65 cytotoxic T lymphocyte (CTL) response restricted by HLA-G in triple transgenic mice (HLA-G, human β2m, human CD8α) was then investigated by injection of dendritic cells loaded with synthetic pp65-derived peptides or by infection with canarypox virus expressing pp65. Results showed that CTLs from HLA-G mice have the capacity to kill target cells either infected with recombinant vaccinia viruses expressing pp65 or loaded with specific pp65-derived peptides using HLA-G as an antigen-presenting molecule. It was also demonstrated that these HLA-G-restricted pp65-specific T cells are able to kill the human astrocytoma cell line U373, which was transfected with HLA-G and infected with HCMV. Moreover, using HLA-G tetramers refolded with a synthetic pp65-derived peptide, peptide-specific CD8+ cells restricted by HLA-G have been detected in vivo. These findings provide the first evidence that HLA-G can select anti-HCMV-restricted CTLs in vivo, although the potency of this cytolytic response is limited (20–25 %). The weak HLA-G-restricted anti-HCMV response is probably due to HLA-G-mediated inhibitory signals on the development of an antiviral CTL response.", }