Sequence-specific alterations of epitope production by HIV protease inhibitors.
Sequence-specific alterations of epitope production by HIV protease inhibitors.
复制标题
DOI:
10.4049/jimmunol.1302805
复制
发表时间:
2014-04-15
期刊:
影响因子:
--
通讯作者:
Le Gall S
中科院分区:
文献类型:
--
作者:
Kourjian G;Xu Y;Mondesire-Crump I;Shimada M;Gourdain P;Le Gall S
Antigen processing by intracellular proteases and peptidases and epitope presentation are critical for recognition of pathogen-infected cells by CD8+ T lymphocytes. First generation HIV protease inhibitors (PIs) alter proteasome activity, but the effect of first or second generation PIs on other cellular peptidases, the underlying mechanism and impact on antigen processing and epitope presentation to CTL are still unknown. Here we demonstrate that several HIV PIs altered not only proteasome but also aminopeptidase activities in PBMC. Using an in vitro degradation assay involving PBMC cytosolic extracts we showed that PIs altered the degradation patterns of oligopeptides and peptide production in a sequence-specific manner, enhancing the cleavage of certain residues and reducing others’. PIs affected the sensitivity of peptides to intracellular degradation, altered the kinetics and amount of HIV epitopes produced intracellularly. Accordingly the endogenous degradation of incoming virions in the presence of PIs led to variations in CTL-mediated killing of HIV-infected cells. By altering host protease activities and the degradation patterns of proteins in a sequence-specific manner, HIV PIs may diversify peptides available for MHC-I presentation to CTL, alter the patters of CTL responses, and may provide a complementary approach to current therapies for the CTL-mediated clearance of abnormal cells in infection, cancer or other immune disease.
登录
查看更多内容
DOI:
10.4049/jimmunol.0803663
发表时间:
2009-11-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Hearn A;York IA;Rock KL
通讯作者:
Rock KL
影响因子:
4.4
作者:
Feeney, ME;Tang, YH;Goulder, PJR
通讯作者:
Goulder, PJR
影响因子:
2.9
作者:
Batchelor, RH;Zhou, MJ
通讯作者:
Zhou, MJ
DOI:
10.1097/00126334-200304010-00005
发表时间:
2003-04-01
影响因子:
3.6
作者:
Cardiello, PG;Monhaphol, T;Phanuphak, P
通讯作者:
Phanuphak, P
DOI:
10.3324/haematol.2011.049981
发表时间:
2012-07-01
期刊:
HAEMATOLOGICA-THE HEMATOLOGY JOURNAL
影响因子:
--
作者:
Bono, Camille;Karlin, Lionel;Arnulf, Bertrand
通讯作者:
Arnulf, Bertrand