The Journal of Immunology, Vol 142, Issue 8 2847-2854, Copyright © 1989 by American Association of Immunologists

ARTICLES

Measles virus-specific human T cell clones. Characterization of specificity and function of CD4+ helper/cytotoxic and CD8+ cytotoxic T cell clones

RS van Binnendijk, MC Poelen, P de Vries, HO Voorma, AD Osterhaus and FG Uytdehaag
Department of Immunobiology, National Institute of Public Health and Environmental Protection, Bilthoven, The Netherlands.

PBMC from healthy adult individuals seropositive for measles virus (MV) were tested for their capacity to proliferate to UV-inactivated MV (UV- MV) or to autologous MV-infected EBV-transformed B cell lines (EBV-BC). MV-specific T cell responses were observed in 11 of 15 donors tested (stimulation index greater than 2), when optimal doses of UV-MV were used in proliferative assays. T cell clones were generated from PBMC of three donors responding to MV, by using either UV-MV or MV-infected autologous EBV-BC as APC. Stimulation with UV-MV generated exclusively CD3+ CD4+ CD8- MV-specific T cells, whereas after stimulation of PBMC with MV-infected EBV-BC, both CD3+ CD4+ CD8- and CD3+ CD4- CD8+ MV- specific T cell clones were obtained. Of 19 CD4+ T cell clones tested so far, 7 clones reacted specifically with purified fusion protein and 1 with purified hemagglutinin protein. Seven clones proliferated in response to the internal proteins of MV. Three clones reacted to whole virus but not to one of the purified proteins, whereas one clone seemed to recognize more than one polypeptide. Some of the T cell clones, generated from in vitro stimulation of PBMC with UV-MV, failed to recognize MV Ag when MV-infected EBV-BC were used as APC instead of UV- MV and PBMC. CD3+ CD4+ CD8- T cell clones recognized MV in association with HLA class II Ag (HLA-DQ or -DR), and most of them displayed CTL activity to autologous MV-infected EBV-BC. All CD4+ HLA class II- restricted CTL clones thus far tested were capable of assisting B lymphocytes for the production of MV-specific antibody. The CD4- CD8+ T cell clone MARO 1 recognized MV in association with HLA class I molecules and displayed cytotoxic activity toward MV-infected EBV-BC.

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