Abstract:
BACKGROUND/AIMS:Early weaning has been shown to induce intestinal ornithine decarboxylase (ODC) activities and cell proliferation in rats. No information is available about the effect of early weaning on ODC activity in the stomach. METHODS:Suckling rats were prematurely weaned on postnatal day 15 and followed through day 21. Oxyntic gland mucosa of stomach was obtained on postnatal days 15, 16, 18 and 21 (days 0, 1, 3 and 6 after early weaning) and assayed for ODC activity, DNA, protein and pepsinogen activity. alpha-Difluoromethyl ornithine (DFMO), a specific ODC inhibitor, was given orally to early-weaned pups and its resultant effects were assessed on days 1 and 6 after early weaning. RESULTS:Stomach mucosal wet weight, DNA, protein and pepsinogen activities significantly increased on day 6 after early weaning. ODC activity increased on days 1, 3, and 6 after early weaning, with the highest increase (3-fold) on day 1 when compared to controls. The increases of ODC activity, DNA and protein contents as induced by early weaning were significantly suppressed when pups were exposed to DFMO. However, no suppression of pepsinogen activity was observed. CONCLUSIONS:Our study shows that early weaning induces ODC activity and functional growth in the stomach. Gastric ODC activity is essential in gastric mucosal growth processes but not in differentiation. The induction of stomach ODC may act as an early marker in the growth of stomach mucosa induced by early weaning in rats.
journal_name
Digestionjournal_title
Digestionauthors
Lin CH,Lyons H,Seelbach MS,Tolia V,Vijesurier Rdoi
10.1159/000051892subject
Has Abstractpub_date
2001-01-01 00:00:00pages
214-9issue
4eissn
0012-2823issn
1421-9867pii
51892journal_volume
63pub_type
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