Heterogeneous effects of exogenous IL‐2 on HIV‐specific cell‐mediated immunity (CMI)
Heterogeneous effects of exogenous IL‐2 on HIV‐specific cell‐mediated immunity (CMI)
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外源性 IL-2 对 HIV 特异性细胞介导免疫 (CMI) 的异质效应
DOI:
10.1111/j.1365-2249.1992.tb05823.x
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发表时间:
1992
影响因子:
4.6
通讯作者:
R. Penny
中科院分区:
文献类型:
--
作者:
S. Bell;D. Cooper;B. Kemp;R. Doherty;R. Penny
A characteristic feature associated with HIV‐1 infection of the human host is a chronic decline in circulating CD4+ T helper/inducer cell numbers. Impaired cell‐mediated immune functions usually occur in parallel with the decline in CD4+ T cells. Activated CD4+ T helper cells are a major source of endogenous IL‐2 which is required for the immunoregulation of both antigen‐specific B cells and CD8+ T cells. HIV‐specific T cell proliferative responses are said to be weak and inconsistent, even during the asymptomatic phase of disease. We thus wished to determine how exogenous IL‐2 affected HIV‐specific T cell proliferation at different stages of the disease. Our cohort of 81 included both asymptomatic and symptomatic HIV‐infected patients as well as uninfected normal donors. Proliferative responses of peripheral blood mononuclear cells (PBMC) that were elicited during culture with an immunodominant gp41‐derived synthetic peptide, gp41 (8), and which were known to be CD8+ cell‐associated in asymptomatics only, were used to analyse the effects of exogenous IL‐2. IL‐2 had three main effects on HIV‐specific proliferation, namely (i) an additive effect, (ii) a synergistic effect, and (iii) an induced effect. More specifically, low dose exogenous IL‐2 frequently augmented lymphoproliferation in both asymptomatic and symptomatic gp4l(8) rcspondcrs. In most symptomatics, however, who were predominantly gp4l(8) non‐responders, exogenous IL‐2 induced lymphoproliferation. Flow cytometric analyses using dual immunofluorescence were used to analyse the T cell subset distribution of proliferating PBMC cultures. During culture with gp4l(8), bothCD4+and CD8+ T cell numbers increased. However, after the addition of exogenous IL‐2 to gp4l(8)‐containing cultures, CD8+ cell‐associated lymphoproliferative responses were preferentially augmented. These results suggest that in symptomatics there is an inadequate supply of endogenous IL‐2 to help maintain the strong and effective CD8+ cell‐associated anti‐viral immunity, and an exogenous supply of IL‐2 may be required.
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影响因子:
4.6
作者:
Gupta,S;Gillis,S;Thornton,M;Goldberg,M
通讯作者:
Goldberg,M
影响因子:
4.6
作者:
Murray,JL;Hersh,EM;Reuben,JM;Munn,CG;Mansell,PW
通讯作者:
Mansell,PW
DOI:
10.1172/jci112194
发表时间:
1985
期刊:
The Journal of clinical investigation
影响因子:
--
作者:
Murray,HW;Welte,K;Jacobs,JL;Rubin,BY;Mertelsmann,R;Roberts,RB
通讯作者:
Roberts,RB
DOI:
--
发表时间:
1984
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Prince,HE;Kermani-Arab,V;Fahey,JL
通讯作者:
Fahey,JL
DOI:
--
发表时间:
1988
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Rinaldo,C;Piazza,P;Wang,YZ;Armstrong,J;Gupta,P;Ho,M;Petteway,S;Reed,D;Lyter,D;Kingsley,L
通讯作者:
Kingsley,L