Abstract:
AIM:To investigate omeprazole-induced transepithelial gastric leak and its effects on the permeability of the peptides bradykinin and oxytocin. METHODS:Rat gastric corpus tissue was isolated and mounted in an Ussing chamber apparatus to evaluate the permeability of (3)H-bradykinin, (3)H-oxytocin, and (14)C-EDTA in the presence or absence of omeprazole. Thin-layer chromatography was performed to identify any metabolic breakdown products of the peptides resulting from permeation through the gastric tissue, and thereby calculate the true flux of the peptide. RESULTS:The flux rate of intact (3)H-bradykinin increased substantially after omeprazole addition (109.5%) compared to the DMSO vehicle control (14%). No corresponding change in flux of intact (3)H-oxytocin was observed under the same conditions (11.9% and 6.4% in the DMSO- and omeprazole-treated conditions, respectively). After exposure to omeprazole, the flux rate of (14)C-EDTA also increased dramatically (122.3%) compared to the DMSO condition (36.3%). CONCLUSION:The omeprazole-induced gastric leak allows for transmucosal permeability to charged molecules as well as non-electrolytes. This induced leak will allow certain peptides to permeate.
journal_name
World J Gastroenteroljournal_title
World journal of gastroenterologyauthors
Gabello M,Valenzano MC,Zurbach EP,Mullin JMdoi
10.3748/wjg.v16.i9.1097subject
Has Abstractpub_date
2010-03-07 00:00:00pages
1097-103issue
9eissn
1007-9327issn
2219-2840journal_volume
16pub_type
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