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Lysophosphatidic acid (LPA) promotes E-cadherin ectodomain shedding and OVCA429 cell invasion in an uPA-dependent manner.

Abstract：

OBJECTIVES:To evaluate the role of LPA in regulating E-cadherin cell surface expression, adhesion, and invasion in epithelial ovarian carcinoma (EOC) cells. METHODS:E-cadherin mRNA expression in OVCA429 and IOSE-29 cells was evaluated by real-time RT-PCR. Immunofluorescence and Western blot analysis were performed to determine cell surface expression and shedding of E-cadherin 80-kDa soluble fragment by LPA. Kinetics of LPA-induced uPA activity was followed with a colorimetric enzymatic assay. Invasion assays were performed in a modified Boyden chamber where cells were allowed to migrate to the bottom compartment through a porous filter coated with collagen. Additionally we measured the 80-kDa form from the ascites of women with stage III/IV EOC. RESULTS:LPA induces E-cadherin shedding of a soluble 80-kDa fragment. We found that this process is mediated by the uPA proteolytic cascade. High levels of soluble E-cadherin were found in the ascites from women with advanced stage EOC. LPA and a soluble recombinant E-cadherin-Fc chimera promotes invasion of OVCA429 cells. CONCLUSIONS:LPA induces shedding of an 80-kDa E-cadherin-soluble fragment in an uPA-dependent manner and promotes in vitro invasion. High levels of soluble E-cadherin in malignant ascites may also affect ovarian metastasis.

journal_name

Gynecol Oncol

journal_title

Gynecologic oncology

authors

Gil OD,Lee C,Ariztia EV,Wang FQ,Smith PJ,Hope JM,Fishman DA

doi

10.1016/j.ygyno.2007.10.027

subject

Has Abstract

pub_date

2008-02-01 00:00:00

pages

361-9

issue

2

eissn

0090-8258

issn

1095-6859

pii

S0090-8258(07)00850-5

journal_volume

108

pub_type

杂志文章

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