PMID- 27158744 OWN - NLM STAT- MEDLINE DCOM- 20170207 LR - 20220321 IS - 1744-5116 (Electronic) IS - 1388-0209 (Linking) VI - 54 IP - 11 DP - 2016 Nov TI - Effect of mulberry leaf (Folium Mori) on insulin resistance via IRS-1/PI3K/Glut-4 signalling pathway in type 2 diabetes mellitus rats. PG - 2685-2691 AB - CONTEXT: Folium Mori, the leaf of Morus alba L. (Moraceae), has been used in traditional Chinese medicine (TCM) for treating diabetes. However, it is unclear which components in the mulberry leaf are effective for the treatment of type 2 diabetes mellitus (T2DM). OBJECTIVE: To investigate the flavonoids and polyphenols in mulberry leaves and their antihyperglycemic and antihyperlipidemic effects in T2DM rats. MATERIALS AND METHODS: Male Sprague-Dawley rats were divided into five groups: normal control (NC), diabetic control (DBC), diabetic group with 0.3 mg/kg b.w./day rosiglitazone (RSG), diabetic group with 7 g/kg b.w./day TCM formula and diabetic group with 2 g/kg b.w./day Folium Mori extract (FME). After 4 weeks, the rats were sacrificed; biochemical parameters, gene and protein expression were measured. RESULTS: The FBG level was significantly lower in the FME group than in the DBC group (p < 0.05). In oral glucose tolerance test, the AUC was significantly lower in the FME group (p < 0.05). The HOMA-IR level was significantly decreased in the FME group (p < 0.05). FME decreased the total cholesterol (TC), triglyceride (TG) and low density lipoprotein (LDL) levels (p < 0.05). FME increased the mRNA and protein expression of IRS-1, PI3K p85alpha and Glut-4 increased significantly (p < 0.05). Histological analysis revealed amelioration of lipid accumulation following FME treatment. Additionally, immunohistochemical analysis displayed stronger staining of Glut-4 in the FME group compared to the DBC group. DISCUSSION AND CONCLUSION: FME could decrease the body weight, blood glucose, TG, TC and LDL levels, and improve insulin resistance. FME possessed significant antihyperglycemic and antihyperlipidemic activities via the IRS-1/PI3K/Glut-4 signalling pathway. FAU - Cai, Shengyu AU - Cai S AD - a Beijing University of Chinese Medicine , Beijing , P.R. China. FAU - Sun, Wen AU - Sun W AD - b Key Laboratory of the Health-Cultivation of the Ministry of Education , Beijing University of Chinese Medicine , Beijing , P.R. China. AD - c Beijing Key Laboratory of the Health-Cultivation , Beijing , P.R. China. AD - d Beijing International Technology Cooperation Base for Prevention and Treatment of Diabetes Mellitus with Chinese Medicine , Beijing , P.R. China. FAU - Fan, Yixin AU - Fan Y AD - e Department of Science and Technology , Beijing University of Chinese Medicine , Beijing , P.R. China. FAU - Guo, Xuan AU - Guo X AD - f Dongfang Hospital Affiliated to Beijing University of Chinese Medicine , Beijing , P.R. China. FAU - Xu, Guangyuan AU - Xu G AD - f Dongfang Hospital Affiliated to Beijing University of Chinese Medicine , Beijing , P.R. China. FAU - Xu, Tunhai AU - Xu T AD - g School of Chinese Pharmacy , Beijing University of Chinese Medicine , Beijing , P.R. China. FAU - Hou, Yi AU - Hou Y AD - f Dongfang Hospital Affiliated to Beijing University of Chinese Medicine , Beijing , P.R. China. FAU - Zhao, Baosheng AU - Zhao B AD - h Scientific Research Experiment Center, Beijing University of Chinese Medicine , Beijing , P.R. China. FAU - Feng, Xingzhong AU - Feng X AD - i Beijing Shijitan Hospital, Capital Medical University , Beijing , P.R. China. FAU - Liu, Tonghua AU - Liu T AD - b Key Laboratory of the Health-Cultivation of the Ministry of Education , Beijing University of Chinese Medicine , Beijing , P.R. China. AD - c Beijing Key Laboratory of the Health-Cultivation , Beijing , P.R. China. AD - d Beijing International Technology Cooperation Base for Prevention and Treatment of Diabetes Mellitus with Chinese Medicine , Beijing , P.R. China. LA - eng PT - Journal Article DEP - 20160509 PL - England TA - Pharm Biol JT - Pharmaceutical biology JID - 9812552 RN - 0 (Glucose Transporter Type 4) RN - 0 (Insulin Receptor Substrate Proteins) RN - 0 (Irs1 protein, rat) RN - 0 (Plant Extracts) RN - EC 2.7.1.- (Phosphatidylinositol 3-Kinases) RN - IY9XDZ35W2 (Glucose) SB - IM MH - Animals MH - Diabetes Mellitus, Type 2/*drug therapy/metabolism MH - Glucose/metabolism MH - Glucose Transporter Type 4/*physiology MH - Insulin Receptor Substrate Proteins/*physiology MH - *Insulin Resistance MH - Lipid Metabolism/drug effects MH - Male MH - *Morus MH - Muscle, Skeletal/drug effects/metabolism MH - Phosphatidylinositol 3-Kinases/*physiology MH - Plant Extracts/*pharmacology MH - Plant Leaves MH - Rats MH - Rats, Sprague-Dawley MH - Signal Transduction/*drug effects OTO - NOTNLM OT - Antihyperglycemic effect OT - antihyperlipidemic effect OT - flavonoids OT - polyphenols OT - skeletal muscle EDAT- 2016/05/10 06:00 MHDA- 2017/02/09 06:00 CRDT- 2016/05/10 06:00 PHST- 2016/05/10 06:00 [pubmed] PHST- 2017/02/09 06:00 [medline] PHST- 2016/05/10 06:00 [entrez] AID - 10.1080/13880209.2016.1178779 [doi] PST - ppublish SO - Pharm Biol. 2016 Nov;54(11):2685-2691. doi: 10.1080/13880209.2016.1178779. Epub 2016 May 9.