The Expression and Function of Cathepsin E in Dendritic Cells1
The Expression and Function of Cathepsin E in Dendritic Cells1
复制标题
组织蛋白酶E在树突状细胞中的表达和功能1
作者:
B. Chain;P. Free;P. Medd;Claire Swetman;A. Tabor;N. Terrazzini
Cathepsin E is an aspartic proteinase that has been implicated in Ag processing within the class II MHC pathway. In this study, we document the presence of cathepsin E message and protein in human myeloid dendritic cells, the preeminent APCs of the immune system. Cathepsin E is found in a perinuclear compartment, which is likely to form part of the endoplasmic reticulum, and also a peripheral compartment just beneath the cell membrane, with a similar distribution to that of Texas Red-dextran within 2 min of endocytosis. To investigate the function of cathepsin E in processing, a new soluble targeted inhibitor was synthesized by linking the microbial aspartic proteinase inhibitor pepstatin to mannosylated BSA via a cleavable disulfide linker. This inhibitor was shown to block cathepsin D/E activity in cell-free assays and within dendritic cells. The inhibitor blocked the ability of dendritic cells from wild-type as well as cathepsin D-deficient mice to present intact OVA, but not an OVA-derived peptide, to cognate T cells. The data therefore support the hypothesis that cathepsin E has an important nonredundant role in the class II MHC Ag processing pathway within dendritic cells.
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DOI:
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发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Finley,EM;Kornfeld,S
通讯作者:
Kornfeld,S
DOI:
--
发表时间:
1992
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Rodriguez,GM;Diment,S
通讯作者:
Diment,S
影响因子:
2.9
作者:
Martzen,MR;McMullen,BA;Smith,NE;Fujikawa,K;Peanasky,RJ
通讯作者:
Peanasky,RJ
影响因子:
32.4
作者:
Riese, RJ;Wolf, PR;Chapman, HA
通讯作者:
Chapman, HA
影响因子:
--
作者:
Zalatoris,J;Rao-Naik,C;Fecho,G;Girdwood,K;Kay,J;Dunn,BM
通讯作者:
Dunn,BM