Demonstration of identical expanded clones within both CD8+CD28+ and CD8+CD28- T cell subsets in HIV type 1-infected individuals.

Important note: Information in this article was accurate in 1998. The state of the art may have changed since the publication date.

Demonstration of identical expanded clones within both CD8+CD28+ and CD8+CD28- T cell subsets in HIV type 1-infected individuals.

Eur J Immunol. 1998 May;28(5):1738-42. Unique Identifier : AIDSLINE MED/98264644
Mugnaini EN; Spurkland A; Egeland T; Sannes M; Brinchmann JE; Institute of Transplantation Immunology, Rikshospitalet National; Hospital, Oslo, Norway.

Abstract: In HIV-1-infected individuals, the CD8+CD28- T cell subset is considerably expanded and is frequently the largest subset of T cells found in peripheral blood. It has been assumed, but not proven, that CD8+CD28- T cells derive from CD8+CD28+ T cells in vivo. To further study the ontogeny of CD8+CD28- T cells, we have performed analyses of the complementarity determining region 3 CDR3) of the TCRB of CD8+CD28+ and CD8+CD28- T cells from the peripheral blood of HIV-1-infected individuals. When cells from the same individual were compared, expanded peaks in CDR3 length analysis within a given BV family were frequently observed at the same location in both CD8+ subsets (p < 0.001). Sequencing of cDNA corresponding to dominant peaks revealed the presence of identical expanded CD8+ T cell clones within both the CD28+ and CD28- subsets on eight of nine attempts. Our results show that CD8+CD28+ and CD8+CD28- T cells are phenotypic variants of the same lineage, most likely evolving from CD8+CD28+ to end-stage CD8+CD28- T cells.

Keywords: *Antigens, CD28/BLOOD *Antigens, CD8/BLOOD *HIV Infections/IMMUNOLOGY *HIV-1/IMMUNOLOGY *T-Lymphocyte Subsets/CYTOLOGY *T-Lymphocyte Subsets/IMMUNOLOGY
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