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. 1993 Oct;67(10):6259–6264. doi: 10.1128/jvi.67.10.6259-6264.1993

Specificity analysis of human CD4+ T-cell clones directed against human herpesvirus 6 (HHV-6), HHV-7, and human cytomegalovirus.

M Yasukawa 1, Y Yakushijin 1, M Furukawa 1, S Fujita 1
PMCID: PMC238049  PMID: 8396680

Abstract

In order to clarify antigenic variations among various isolates of human herpesvirus 6 (HHV-6) and cross-reactivity among HHV-6, HHV-7, and human cytomegalovirus (HCMV) in the T-cell immune response, the antigenic specificity of the proliferative response mediated by 232 CD4+ human T-cell clones directed against HHV-6, HHV-7, or HCMV was examined. The results obtained were as follows. (i) Although the majority of T-cell clones directed against HHV-6 proliferated in response to stimulation with all strains of HHV-6 used (U1102, Z29, SF, and HST), 7% (8 of 122) of the T-cell clones showed distinct patterns of proliferative response against strain U1102 (group A) and other strains of HHV-6 (group B). (ii) Of 99 T-cell clones, 71 showed a distinct proliferative response to HHV-6 and HHV-7, whereas 28 proliferated in response to stimulation with both HHV-6 and HHV-7. (iii) A small number of T-cell clones (9 of 232) showed cross-reactivity against HHV-6 and HCMV, and 2 of the 232 clones were reactive with HCMV as well as with HHV-6 and HHV-7. (iv) The specificity of gamma interferon production by T-cell clones following the stimulation with virus antigen was identical to that of their proliferative response. These data thus indicate the presence of antigenic variations among isolates of HHV-6 and also epitopes common to HHV-6 and HHV-7 and to HHV-6, HHV-7, and HCMV which are recognized by CD4+ T cells.

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Selected References

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