title: The gastroprotective effect of tannins extracted from duhat (Syzygium cumini Skeels) bark on HCl/ethanol induced gastric mucosal injury in Sprague-Dawley rats.
abstract: The gastroprotective effect of quantified tannins (13.4%) from Syzygium cumini was determined. Gastric mucosal damage was induced in sixty eight rats by oral gavage administration of HCl/ethanol solution. For macroscopic and microscopic studies, 30 rats were divided into three groups consisting of a negative control, an Omeprazole group and a Tannins group. There was no significant difference in the number, size and surface area of macroscopic lesions between the three groups. Microscopic examination using Best's Ulcer Staging Index showed that Tannins had a very significant decrease in gastric mucosal damage with p<0.01. Average lymphocyte populations in the three groups showed no significant difference, although both the Tannins and Omeprazole group had fewer lymphocytes. Thirty-eight rats were studied for the amount of free radicals present after induction of gastric damage. A dose which consisted of 20.0 g tannins/kg rat weight showed significantly lower stomach free radical concentrations. These findings suggest that tannins extracted from S. cumini have gastroprotective and anti-ulcerogenic effects.
authors.affiliation: Department of Physiology, College of Medicine, University of the Philippines, Ermita, Manila, Philippines. cvlab@cm.upm.edu.ph
authors.forename: Rebecca O
authors.initials: RO
authors.lastname: Ramirez
authors.forename: Camilo C
authors.initials: CC
authors.lastname: Roa
mesh_terms: D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use; D000897:Anti-Ulcer Agents / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use*; D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use; D004305:Dose-Response Relationship, Drug; D004353:Drug Evaluation, Preclinical; D004359:Drug Therapy, Combination; D000431:Ethanol / Q000633:toxicity; D005260:Female; D016166:Free Radical Scavengers / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use; D005753:Gastric Mucosa / Q000187:drug effects / Q000473:pathology; D006851:Hydrochloric Acid / Q000633:toxicity; D018655:Lymphocyte Count; D009853:Omeprazole / Q000008:administration & dosage / Q000627:therapeutic use; D008517:Phytotherapy; D010865:Pilot Projects; D024301:Plant Bark / Q000737:chemistry; D010936:Plant Extracts / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use; D010946:Plants, Medicinal / Q000737:chemistry; D051381:Rats; D017207:Rats, Sprague-Dawley; D013276:Stomach Ulcer / Q000139:chemically induced / Q000188:drug therapy* / Q000473:pathology; D027842:Syzygium / Q000737:chemistry*; D013634:Tannins / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use*
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D000897:Anti-Ulcer Agents; D000975:Antioxidants; D016166:Free Radical Scavengers; D010936:Plant Extracts; D013634:Tannins; D000431:Ethanol; D009853:Omeprazole; D006851:Hydrochloric Acid