Increased CD95/Fas-induced apoptosis of HIV-specific CD8(+) T cells.

Abstract:

:Why HIV-specific CD8(+) T cells ultimately fail to clear or control HIV infection is not known. We show here that HIV-specific CD8(+) T cells exhibit increased sensitivity to CD95/Fas-induced apoptosis. This apoptosis is 3-fold higher compared to CMV-specific CD8(+) T cells from the same patients. HIV-specific CD8(+) T cells express the CD45RA(-)CD62L(-) but lack the CD45RA(+)CD62L(-) T cell effector memory (T(EM)) phenotype. This skewing is not found in CMV- and EBV-specific CD8(+) T cells in HIV-infected individuals. CD95/Fas-induced apoptosis is much higher in the CD45RA(-)CD62L(-) T(EM) cells. However, cytotoxicity and IFNgamma production by HIV-specific CD8(+) T cells is not impaired. Our data suggest that the survival and differentiation of HIV-specific CD8(+) T cells may be compromised by CD95/Fas apoptosis induced by FasL-expressing HIV-infected cells.

journal_name

Immunity

journal_title

Immunity

authors

Mueller YM,De Rosa SC,Hutton JA,Witek J,Roederer M,Altman JD,Katsikis PD

doi

10.1016/s1074-7613(01)00246-1

keywords:

subject

Has Abstract

pub_date

2001-12-01 00:00:00

pages

871-82

issue

6

eissn

1074-7613

issn

1097-4180

pii

S1074-7613(01)00246-1

journal_volume

15

pub_type

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