Effect of chronic aspirin ingestion on epithelial proliferation in rat fundus, antrum, and duodenum.

Abstract:

:We studied the effect of chronic aspirin ingestion on gastroduodenal epithelial proliferation by feeding rats aspirin in the drinking water. A control group of rats received plain water. At the end of 4 wk, [3H]-thymidine was given intravenously to label proliferating cells, and the rats were killed 1 h later. Sections of fundus, antrum, and proximal duodenum were processed for light autoradiography. We found that chronic aspirin ingestion stimulated epithelial proliferation in fundic mucosa but had no effect in the antrum. In the duodenum, aspirin increased proliferation in the lowest four crypt-cell positions, which most likely indicates an increase in stem-cell production. None of the tissues contained evidence of inflammation or ulceration. The proliferative effects of aspirin may help explain the previously observed phenomenon of mucosal adaptation in the rat after repeated exposure to aspirin. Further, if human gastroduodenal epithelium responds in a similar manner to chronic aspirin exposure, the effects on proliferation may explain in part the distribution of aspirin-associated ulcers.

journal_name

Gastroenterology

journal_title

Gastroenterology

authors

Eastwood GL,Quimby GF

subject

Has Abstract

pub_date

1982-05-01 00:00:00

pages

852-6

issue

5 Pt 1

eissn

0016-5085

issn

1528-0012

pii

S0016508582000882

journal_volume

82

pub_type

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