Novel expression and regulation of gastrin gene in human ovarian cancer cell line, SW626.

Abstract:

:Gastrin-secreting tumors have been identified in ectopic locations including the ovary; the mechanisms regulating gastrin gene expression, its distribution, and signaling pathways in these ectopic tissues are not known. The purpose of our present study was to determine: (1) whether the gastrin gene and peptide could be detected in ovarian cancer cell lines, (2) if functional gastrin releasing peptide receptors (GRP-R) are present, and (3) whether gastrin gene expression is altered by GRP. Five ovarian cancer cell lines (SW626, OVCA 420, OVCA 429, OVCA 432, and OVCA 433) were analyzed. We identified gastrin gene and peptide expression in the SW626 cell line but not in the OVCA lines. SW626 cells express a functional GRP-R that is correctly coupled to the Ca2+ signaling pathway. Treatment of SW626 cells with bombesin, the amphibian equivalent of GRP, inhibited expression of the gastrin gene in a time- and dose-dependent fashion. The SW626 ovarian cancer cell line will provide a useful model to further define regulation and expression of both the gastrin gene and peptide in ectopic (nongastrointestinal) tissues.

journal_name

Dig Dis Sci

authors

Kim HJ,Evers BM,Banker NA,Greeley GH Jr,Hellmich MR,Thompson JC,Townsend CM Jr

doi

10.1023/a:1018846311239

subject

Has Abstract

pub_date

1998-07-01 00:00:00

pages

1465-73

issue

7

eissn

0163-2116

issn

1573-2568

journal_volume

43

pub_type

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