WORTMANNIN INHIBITS TRANSCYTOSIS OF DIMERIC IEA BY THE POLYMERIC IMMUNOGLOBULIN RECEPTOR

被引：35

作者：

CARDONE, M

MOSTOV, K

机构：

[1] UNIV CALIF SAN FRANCISCO,DEPT ANAT,SAN FRANCISCO,CA 94143

[2] UNIV CALIF SAN FRANCISCO,DEPT BIOCHEM & BIOPHYS,SAN FRANCISCO,CA 94143

[3] UNIV CALIF SAN FRANCISCO,INST CARDIOVASC RES,SAN FRANCISCO,CA 94143

来源：

FEBS LETTERS | 1995年 / 376卷 / 1-2期

关键词：

REGIONAL IMMUNITY; EPITHELIAL CELL; CELL SIGNALING; SIGNALING MOLECULE; PHOSPHATIDYLINOSITOL; 3-KINASE;

D O I：

10.1016/0014-5793(95)01251-8

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Phosphatidyl inositol 3-kinase (PI3K) plays an essential role in numerous signaling events, and increasingly has been implicated in regulation of certain membrane traffic events, The polymeric immunoglobulin receptor (pIgR) transcytoses dimeric IgA (dlgA) across epithelial cells and into external secretions, where the dIgA forms the first specific immunological defense against infection, We show here that wortmannin, a highly specific inhibitor of PI3K, inhibits transcytosis of dIgA by the pIgR. Instead, the dIgA is recycled back to the basolateral surface of the epithelial cell, PI3K therefore plays an essential role in regulating the transcytosis of dIgA, a key step in the mucosal immune response.

引用

页码：74 / 76

页数：3

共 30 条

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