Cytoprotective effect of epidermal growth factor on acid- and pepsin-induced damage to rat gastric epithelial cells: roles of Na+/H+ exchangers.

Abstract:

:We have previously established a cell damage model, with damage induced by either acid or pepsin treatment for 30 min, involving a rat gastric epithelial cell line (RGM1). In the present study, pretreatment of cells with epidermal growth factor (EGF; 0.1-10 ng/mL) or sucralfate (0.1-3 mg/mL) for 4 h prevented such cell damage in a concentration-dependent manner. Protection of cells by these drugs was not affected by pretreatment with indomethacin (10(-5) mol/L) for 4 h. Removal of Na+, but not Ca2+, from the acidified medium totally abolished the inhibitory effect of EGF, but not that of sucralfate. Genistein (a tyrosine kinase inhibitor) apparently reduced the inhibitory effect of EGF. DNA synthesis by RGM1 cells did not increase when cells were incubated with EGF for 4 h. We conclude that both EGF and sucralfate protect RGM1 cells from acid- and pepsin-induced damage and that the mechanism of protection by EGF against acid-induced damage seems to be via activation of Na+/H+ exchangers.

authors

Furukawa O,Okabe S

doi

10.1111/j.1440-1746.1997.tb00442.x

subject

Has Abstract

pub_date

1997-05-01 00:00:00

pages

353-9

issue

5

eissn

0815-9319

issn

1440-1746

journal_volume

12

pub_type

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