PMID- 18346054 OWN - NLM STAT- MEDLINE DCOM- 20080717 LR - 20181217 IS - 1742-7843 (Electronic) IS - 1742-7835 (Linking) VI - 102 IP - 5 DP - 2008 May TI - Insulin-secretagogue activity of p-methoxycinnamic acid in rats, perfused rat pancreas and pancreatic beta-cell line. PG - 476-82 LID - 10.1111/j.1742-7843.2008.00218.x [doi] AB - This study investigated the effect of p-methoxycinnamic acid (p-MCA) on plasma glucose and insulin concentrations in normal and streptozotocin-induced diabetic rats. In both fasting and glucose-loading conditions, an oral administration of p-MCA (40-100 mg/kg) significantly decreased plasma glucose and also increased plasma insulin concentrations in both normal and diabetic rats. The onset of the p-MCA-induced antihyperglycaemia/hypoglycaemia was observed at 1 hr after administration. In perfused rat pancreas, p-MCA (10-100 microM) stimulated insulin secretion about 1.4- and 3.1-fold of basal-control group. In addition, p-MCA (10 microM) enhanced glucose-induced insulin secretion. Moreover, p-MCA stimulated insulin secretion and increased intracellular Ca(2+) concentration ([Ca(2+)](i)) in insulinoma-1 cells. Taken together, our findings suggested that p-MCA exerted antihyperglycaemic/hypoglycaemic effect by stimulating insulin secretion from pancreas and could be developed into a new potential for therapeutic agent used in type 2 diabetic patients. FAU - Yibchok-anun, Sirintorn AU - Yibchok-anun S AD - Department of Pharmacology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand. sirintorn.y@chula.ac.th FAU - Adisakwattana, Sirichai AU - Adisakwattana S FAU - Moonsan, Preecha AU - Moonsan P FAU - Hsu, Walter H AU - Hsu WH LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20080316 PL - England TA - Basic Clin Pharmacol Toxicol JT - Basic & clinical pharmacology & toxicology JID - 101208422 RN - 0 (Blood Glucose) RN - 0 (Cinnamates) RN - 0 (Hypoglycemic Agents) RN - 0 (Insulin) RN - 5W494URQ81 (Streptozocin) RN - 6G4ML8401A (4-methoxycinnamic acid) RN - SY7Q814VUP (Calcium) SB - IM MH - Animals MH - Blood Glucose/metabolism MH - Calcium/metabolism MH - Cell Line, Tumor MH - Cinnamates/*pharmacology/therapeutic use MH - Diabetes Mellitus, Experimental/drug therapy MH - Glucose Tolerance Test MH - Hypoglycemic Agents/*pharmacology/therapeutic use MH - In Vitro Techniques MH - Insulin/*blood/metabolism MH - Insulin Secretion MH - Insulin-Secreting Cells/cytology/drug effects/metabolism MH - Intracellular Space/metabolism MH - Male MH - Pancreas/*drug effects/metabolism MH - Perfusion MH - Rats MH - Rats, Wistar MH - Streptozocin EDAT- 2008/03/19 09:00 MHDA- 2008/07/18 09:00 CRDT- 2008/03/19 09:00 PHST- 2008/03/19 09:00 [pubmed] PHST- 2008/07/18 09:00 [medline] PHST- 2008/03/19 09:00 [entrez] AID - PTO218 [pii] AID - 10.1111/j.1742-7843.2008.00218.x [doi] PST - ppublish SO - Basic Clin Pharmacol Toxicol. 2008 May;102(5):476-82. doi: 10.1111/j.1742-7843.2008.00218.x. Epub 2008 Mar 16.