PMID- 33708129 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210313 IS - 1663-9812 (Print) IS - 1663-9812 (Electronic) IS - 1663-9812 (Linking) VI - 12 DP - 2021 TI - Ginsenoside Rc Ameliorates Endothelial Insulin Resistance via Upregulation of Angiotensin-Converting Enzyme 2. PG - 620524 LID - 10.3389/fphar.2021.620524 [doi] LID - 620524 AB - Type 2 diabetes mellitus (T2DM) is a major health concern which may cause cardiovascular complications. Insulin resistance (IR), regarded as a hallmark of T2DM, is characterized by endothelial dysfunction. Ginsenoside Rc is one of the main protopanaxadiol-type saponins with relatively less research on it. Despite researches confirming the potent anti-inflammatory and antioxidant activities of ginsenoside Rc, the potential benefits of ginsenoside Rc against vascular complications have not been explored. In the present study, we investigated the effects of ginsenoside Rc on endothelial IR and endothelial dysfunction with its underlying mechanisms using high glucose- (HG-) cultured human umbilical vein endothelial cells (HUVECs) in vitro and a type 2 diabetic model of db/db mice in vivo. The results showed that ginsenoside Rc corrected the imbalance of vasomotor factors, reduced the production of Ang (angiotensin) II, and activated angiotensin-converting enzyme 2 (ACE2)/Ang-(1-7)/Mas axis in HG-treated HUVECs. Besides, ginsenoside Rc improved the impaired insulin signaling pathway and repressed oxidative stress and inflammatory pathways which constitute key factors leading to IR. Interestingly, the effects of ginsenoside Rc on HG-induced HUVECs were abolished by the selective ACE2 inhibitor MLN-4760. Furthermore, ginsenoside Rc exhibited anti-inflammatory as well as antioxidant properties and ameliorated endothelial dysfunction via upregulation of ACE2 in db/db mice, which were confirmed by the application of MLN-4760. In conclusion, our findings reveal a novel action of ginsenoside Rc and demonstrate that ginsenoside Rc ameliorated endothelial IR and endothelial dysfunction, at least in part, via upregulation of ACE2 and holds promise for the treatment of diabetic vascular complications. CI - Copyright (c) 2021 Wang, Fu, Xue, Lu, Li, Yu, Yu, Xu and Sui. FAU - Wang, Yaozhen AU - Wang Y AD - Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, China. FAU - Fu, Wenwen AU - Fu W AD - Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, China. FAU - Xue, Yan AU - Xue Y AD - Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, China. AD - Department of Burn Surgery, The First Hospital of Jilin University, Changchun, China. FAU - Lu, Zeyuan AU - Lu Z AD - Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, China. FAU - Li, Yuangeng AU - Li Y AD - Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, China. FAU - Yu, Ping AU - Yu P AD - Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, China. FAU - Yu, Xiaofeng AU - Yu X AD - Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, China. FAU - Xu, Huali AU - Xu H AD - Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, China. FAU - Sui, Dayun AU - Sui D AD - Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, China. LA - eng PT - Journal Article DEP - 20210223 PL - Switzerland TA - Front Pharmacol JT - Frontiers in pharmacology JID - 101548923 PMC - PMC7940763 OTO - NOTNLM OT - ACE2 OT - MLN-4760 OT - endothelial cells OT - endothelial dysfunction OT - ginsenoside Rc OT - insulin resistance COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2021/03/13 06:00 MHDA- 2021/03/13 06:01 PMCR- 2021/02/23 CRDT- 2021/03/12 07:13 PHST- 2020/10/23 00:00 [received] PHST- 2021/01/11 00:00 [accepted] PHST- 2021/03/12 07:13 [entrez] PHST- 2021/03/13 06:00 [pubmed] PHST- 2021/03/13 06:01 [medline] PHST- 2021/02/23 00:00 [pmc-release] AID - 620524 [pii] AID - 10.3389/fphar.2021.620524 [doi] PST - epublish SO - Front Pharmacol. 2021 Feb 23;12:620524. doi: 10.3389/fphar.2021.620524. eCollection 2021.