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Orally Administered Phosphatidic Acids and Lysophosphatidic Acids Ameliorate Aspirin-Induced Stomach Mucosal Injury in Mice.
MedLine Citation:
PMID:  23161268     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Recent investigations revealed that lysophosphatidic acid (LPA), a phospholipid with a growth factor-like activity, plays an important role in the integrity of the gastrointestinal tract epithelium. AIM: This paper attempts to clarify the effect of orally administered phosphatidic acid (PA) and LPA on aspirin-induced gastric lesions in mice. MATERIALS AND METHODS: Phospholipids, a free fatty acid, a diacylglycerol and a triglyceride at 1 mM (5.7 μmol/kg body weight) or 0.1 mM were orally administered to mice 0.5 h before oral administration of aspirin (1.7 mmol/kg). The total length of lesions formed on the stomach wall was measured as a lesion index. Formation of LPA from PA in the mouse stomach was examined by in vitro (in stomach lavage fluid), ex vivo (in an isolated stomach) and in vivo (in the stomach of a living mouse) examinations of phospholipase activity. RESULTS: Palmitic acid, dioleoyl-glycerol, olive oil and lysophosphatidylcholine did not affect the aspirin-induced lesions. In contrast, phosphatidylcholine (1 mM), LPA (1 mM) and PA (0.1, 1 mM) significantly reduced the lesion index. Evidence for formation of LPA from PA in the stomach by gastric phospholipase A(2) was obtained by in vitro, ex vivo and in vivo experiments. An LPA-specific receptor, LPA2, was found to be localized on the gastric surface-lining cells of mice. CONCLUSION: Pretreatment with PA-rich diets may prevent nonsteroidal anti-inflammatory drug-induced stomach ulcers.
Authors:
Tamotsu Tanaka; Katsuya Morito; Masafumi Kinoshita; Mayumi Ohmoto; Mai Urikura; Kiyoshi Satouchi; Akira Tokumura
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-18
Journal Detail:
Title:  Digestive diseases and sciences     Volume:  -     ISSN:  1573-2568     ISO Abbreviation:  Dig. Dis. Sci.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7902782     Medline TA:  Dig Dis Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, 770-8505, Japan, tanaka.tamotsu@tokushima-u.ac.jp.
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