CD4+ T cells from HIV-1-infected patients recognize wild-type and mutant human immunodeficiency virus-1 protease epitopes.
CD4+ T cells from HIV-1-infected patients recognize wild-type and mutant human immunodeficiency virus-1 protease epitopes.
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HIV-1 感染患者的 CD4 T 细胞可识别野生型和突变型人类免疫缺陷病毒 1 蛋白酶表位。
DOI:
10.1111/j.1365-2249.2011.04319.x
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发表时间:
2011
影响因子:
4.6
通讯作者:
Moraes,SL
中科院分区:
文献类型:
--
作者:
Muller,NG;Alencar,R;Jamal,L;Hammer,J;Sidney,J;Sette,A;Brindeiro,RM;Kalil,J;Cunha-Neto,E;Moraes,SL
Abstract Human immunodeficiency virus (HIV)-1 protease is a known target of CD8 T cell responses, but it is the only HIV-1 protein in which no fully characterized HIV-1 protease CD4 epitopes have been identified to date. We investigated the recognition of HIV-1 protease by CD4 T cells from 75 HIV-1-infected, protease inhibitor (PI)-treated patients, using the 5, 6-carboxyfluorescein diacetate succinimidyl ester-based proliferation assay. In order to identify putative promiscuous CD4 T cell epitopes, we used the TEPITOPE algorithm to scan the sequence of the HXB2 HIV-1 protease. Protease regions 4-23, 45-64 and 73-95 were identified; 32 sequence variants of the mentioned regions, encoding frequent PI-induced mutations and polymorphisms, were also tested. On average, each peptide bound to five of 15 tested common human leucocyte antigen D-related (HLA-DR) molecules. More than 80% of the patients displayed CD4 as well as CD8 T cell recognition of at least one of the protease peptides. All 35 peptides were recognized. The response was not associated with particular HLA-DR or-DQ alleles. Our results thus indicate that protease is a frequent target of CD4 along with CD8 proliferative T cell responses by the majority of HIV-1-infected patients under PI therapy. The frequent finding of matching CD4 and CD8 T cell responses to the same peptides may indicate that CD4 T cells provide cognate T cell help for the maintenance of long-living protease-specific functional CD8 T cells.
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影响因子:
5.3
作者:
C. Giuli;C. Pieri;L. Piantanelli;N. Fabris
通讯作者:
N. Fabris
DOI:
--
发表时间:
1983
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Dialynas,DP;Quan,ZS;Wall,KA;Pierres,A;Quintans,J;Loken,MR;Pierres,M;Fitch,FW
通讯作者:
Fitch,FW
DOI:
10.1172/jci111545
发表时间:
1984
期刊:
The Journal of clinical investigation
影响因子:
--
作者:
Perez,HD;Roll,FJ;Bissell,DM;Shak,S;Goldstein,IM
通讯作者:
Goldstein,IM
DOI:
--
发表时间:
1986
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Lammie,PJ;Michael,AI;Linette,GP;Phillips,SM
通讯作者:
Phillips,SM
DOI:
--
发表时间:
1980
期刊:
Nordisk veterinaermedicin
影响因子:
--
作者:
L. Eriksen
通讯作者:
L. Eriksen