PMID- 26063468 OWN - NLM STAT- MEDLINE DCOM- 20151217 LR - 20220317 IS - 1520-5118 (Electronic) IS - 0021-8561 (Linking) VI - 63 IP - 26 DP - 2015 Jul 8 TI - Effects of D-Pinitol on Insulin Resistance through the PI3K/Akt Signaling Pathway in Type 2 Diabetes Mellitus Rats. PG - 6019-26 LID - 10.1021/acs.jafc.5b01238 [doi] AB - D-pinitol, a compound isolated from Pinaceae and Leguminosae plants, has been reported to possess insulin-like properties. Although the hypoglycemic activity of D-pinitol was recognized in recent years, the molecular mechanism of D-pinitol in the treatment of diabetes mellitus remains unclear. In this investigation, a model of type 2 diabetes mellitus (T2DM) with insulin resistance was established by feeding a high-fat diet (HFD) and injecting streptozocin (STZ) to Sprague-Dawley (SD) rats, targeting the exploration of more details of the mechanism in the therapy of T2DM. D-pinitol was administrated to the diabetic rats as two doses [30, 60 mg/(kg.body weight.day)]. The level of fasting blood glucose (FBG) was decreased 12.63% in the high-dosage group, and the ability of oral glucose tolerance was improved in D-pinitol-treated groups. The biochemical indices revealed that D-pinitol had a positive effect on hypoglycemic activity. Western boltting suggested that D-pinitol could promote the expression of the phosphatidylinositol-3-kinase (PI3K) p85, PI3Kp110, as well as the downstream target protein kinase B/Akt (at Ser473). Besides, D-pinitol inhibited the expression of glycogen synthesis kinase-3beta (GSK-3beta) protein and regulated the expression of glycogen synthesis (GS) protein and then accelerated the glycogen synthesis. Above all, D-pinitol played a positive role in regulating insulin-mediated glucose uptake in the liver through translocation and activation of the PI3K/Akt signaling pathway in T2DM rats. FAU - Gao, Yunfeng AU - Gao Y FAU - Zhang, Mengna AU - Zhang M FAU - Wu, Tianchen AU - Wu T FAU - Xu, Mengying AU - Xu M FAU - Cai, Haonan AU - Cai H FAU - Zhang, Zesheng AU - Zhang Z LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150623 PL - United States TA - J Agric Food Chem JT - Journal of agricultural and food chemistry JID - 0374755 RN - 0 (Blood Glucose) RN - 0 (Plant Extracts) RN - 484-68-4 (pinitol) RN - 4L6452S749 (Inositol) RN - EC 2.7.1.137 (Phosphatidylinositol 3-Kinase) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - EC 2.7.11.26 (Glycogen Synthase Kinase 3) SB - IM MH - Animals MH - Blood Glucose/metabolism MH - Diabetes Mellitus, Type 2/*drug therapy/enzymology/genetics/metabolism MH - Fabaceae/*chemistry MH - Glucose Tolerance Test MH - Glycogen Synthase Kinase 3/genetics/metabolism MH - Humans MH - Inositol/administration & dosage/*analogs & derivatives MH - *Insulin Resistance MH - Liver/drug effects/metabolism MH - Male MH - Phosphatidylinositol 3-Kinase/genetics/*metabolism MH - Pinaceae/*chemistry MH - Plant Extracts/*administration & dosage/chemistry MH - Proto-Oncogene Proteins c-akt/genetics/*metabolism MH - Rats MH - Rats, Sprague-Dawley MH - Signal Transduction/*drug effects OTO - NOTNLM OT - PI3K/Akt signaling pathway OT - d-pinitol OT - diabetes mellitus EDAT- 2015/06/13 06:00 MHDA- 2015/12/19 06:00 CRDT- 2015/06/12 06:00 PHST- 2015/06/12 06:00 [entrez] PHST- 2015/06/13 06:00 [pubmed] PHST- 2015/12/19 06:00 [medline] AID - 10.1021/acs.jafc.5b01238 [doi] PST - ppublish SO - J Agric Food Chem. 2015 Jul 8;63(26):6019-26. doi: 10.1021/acs.jafc.5b01238. Epub 2015 Jun 23.