PMID- 28091547 OWN - NLM STAT- MEDLINE DCOM- 20181015 LR - 20181217 IS - 2045-2322 (Electronic) IS - 2045-2322 (Linking) VI - 7 DP - 2017 Jan 16 TI - Corydalis edulis Maxim. Promotes Insulin Secretion via the Activation of Protein Kinase Cs (PKCs) in Mice and Pancreatic beta Cells. PG - 40454 LID - 10.1038/srep40454 [doi] LID - 40454 AB - Corydalis edulis Maxim., a widely grown plant in China, had been proposed for the treatment for type 2 diabetes mellitus. In this study, we found that C. edulis extract (CE) is protective against diabetes in mice. The treatment of hyperglycemic and hyperlipidemic apolipoprotein E (ApoE)-/- mice with a high dose of CE reduced serum glucose by 28.84% and serum total cholesterol by 17.34% and increased insulin release. We also found that CE significantly enhanced insulin secretion in a glucose-independent manner in hamster pancreatic beta cell (HIT-T15). Further investigation revealed that CE stimulated insulin exocytosis by a protein kinase C (PKC)-dependent signaling pathway and that CE selectively activated novel protein kinase Cs (nPKCs) and atypical PKCs (aPKCs) but not conventional PKCs (cPKCs) in HIT-T15 cells. To the best of our knowledge, our study is the first to identify the PKC pathway as a direct target and one of the major mechanisms underlying the antidiabetic effect of CE. Given the good insulinotropic effect of this herbal medicine, CE is a promising agent for the development of new drugs for treating diabetes. FAU - Zheng, Jiao AU - Zheng J AD - Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China. FAU - Zhao, Yunfang AU - Zhao Y AD - Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China. FAU - Lun, Qixing AU - Lun Q AD - Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China. AD - School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China. FAU - Song, Yuelin AU - Song Y AD - Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China. FAU - Shi, Shepo AU - Shi S AD - Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China. FAU - Gu, Xiaopan AU - Gu X AD - Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China. AD - School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China. FAU - Pan, Bo AU - Pan B AD - Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China. AD - School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China. FAU - Qu, Changhai AU - Qu C AD - Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China. FAU - Li, Jun AU - Li J AD - Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China. FAU - Tu, Pengfei AU - Tu P AD - Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20170116 PL - England TA - Sci Rep JT - Scientific reports JID - 101563288 RN - 0 (Apolipoproteins E) RN - 0 (Blood Glucose) RN - 0 (Insulin) RN - 0 (Plant Extracts) RN - 0 (RNA, Small Interfering) RN - 0 (Triglycerides) RN - 97C5T2UQ7J (Cholesterol) RN - EC 2.7.11.13 (Protein Kinase C) SB - IM MH - Animals MH - Apolipoproteins E/deficiency/metabolism MH - Blood Glucose/metabolism MH - Cell Membrane/drug effects/metabolism MH - Cholesterol/metabolism MH - Corydalis/*chemistry MH - Cricetinae MH - Cytosol/drug effects/metabolism MH - Enzyme Activation/drug effects MH - Exocytosis/drug effects MH - Fasting/blood MH - Glucose Tolerance Test MH - Insulin/blood/*metabolism MH - Insulin Secretion MH - Insulin-Secreting Cells/drug effects/*enzymology MH - Male MH - Mice MH - Plant Extracts/*pharmacology MH - Protein Kinase C/*metabolism MH - Protein Transport/drug effects MH - RNA, Small Interfering/metabolism MH - Transfection MH - Triglycerides/metabolism PMC - PMC5238372 EDAT- 2017/01/17 06:00 MHDA- 2018/10/16 06:00 PMCR- 2017/01/16 CRDT- 2017/01/17 06:00 PHST- 2016/08/16 00:00 [received] PHST- 2016/11/30 00:00 [accepted] PHST- 2017/01/17 06:00 [entrez] PHST- 2017/01/17 06:00 [pubmed] PHST- 2018/10/16 06:00 [medline] PHST- 2017/01/16 00:00 [pmc-release] AID - srep40454 [pii] AID - 10.1038/srep40454 [doi] PST - epublish SO - Sci Rep. 2017 Jan 16;7:40454. doi: 10.1038/srep40454.