title: Supplementation of cyanidin-3-O-β-glucoside promotes endothelial repair and prevents enhanced atherogenesis in diabetic apolipoprotein E-deficient mice.
abstract: Atherosclerosis is accelerated in diabetes mellitus mainly due to the reduced availability and function of endothelial progenitor cells (EPCs). The purpose of this study was to determine the protective effects of the anthocyanin cyanidin-3-O-β-glucoside (C3G) on EPC function and endothelial repair in diabetic apolipoprotein E-deficient (apoE(-/-)) mice. Diabetes mellitus was induced in 8-wk-old male apoE(-/-) mice with streptozotocin. Diabetic apoE(-/-) mice were fed the AIN-93 diet or an AIN-93 diet supplemented with C3G (0.2% wt:wt) for 6 wk. Sham-injected apoE(-/-) mice fed the AIN-93 diet served as nondiabetic controls. The endothelium-dependent relaxation response to acetylcholine in the aortas of C3G-fed mice was greater by 51% compared with diabetic mice fed the AIN-93 diet (P < 0.05) and was similar to that in nondiabetic apoE(-/-) mice. The capacity of in vitro adhesion to fibronectin, migration, and tube formation was significantly impaired in diabetic EPCs (decreased by 83, 61.9, and 74.5%, respectively, compared with nondiabetic controls; all P < 0.01), which was significantly rescued in response to C3G (increased by 3.9-, 2-, and 1.8-fold compared with diabetic EPCs, respectively; all P < 0.05). At the molecular level, the phosphorylation levels of AMP-activated protein kinase (AMPK) Thr 172 and endothelial nitric oxide synthase (eNOS) Ser1177 were higher in EPCs derived from the C3G-treated diabetic mice compared with those in nondiabetic mice. Furthermore, compared with nondiabetic controls, diabetic apoE(-/-) mice had a 3.5-fold increase in the aortic lesion area, which was lowered by 45% in C3G-fed diabetic mice. This study extends our current knowledge that C3G improves the impairment of EPC function, enhances endothelial repair, and thus limits accelerated atherogenesis caused by diabetes. Our findings emphasize the potential utility of anthocyanin in the prevention and treatment of diabetic vascular complications.
authors.affiliation: Guangdong Provincial Key Laboratory of Food, Nutrition, and Health, School of Public Health, Sun Yat-sen University (Northern Campus), Guangzhou, Guangdong Province, China.
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Wang
authors.forename: Yun
authors.initials: Y
authors.lastname: Wang
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.forename: Min
authors.initials: M
authors.lastname: Xia
mesh_terms: D055372:AMP-Activated Protein Kinases / Q000235:genetics / Q000378:metabolism; D000109:Acetylcholine / Q000378:metabolism; D000818:Animals; D000872:Anthocyanins / Q000008:administration & dosage*; D001011:Aorta / Q000187:drug effects / Q000473:pathology; D001057:Apolipoproteins E / Q000172:deficiency*; D050197:Atherosclerosis / Q000473:pathology / Q000517:prevention & control*; D003921:Diabetes Mellitus, Experimental / Q000188:drug therapy / Q000473:pathology*; D003925:Diabetic Angiopathies / Q000188:drug therapy / Q000517:prevention & control; D004032:Diet; D019587:Dietary Supplements; D042783:Endothelial Cells / Q000187:drug effects / Q000378:metabolism; D004727:Endothelium / Q000187:drug effects* / Q000378:metabolism; D005960:Glucosides / Q000008:administration & dosage*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D052250:Nitric Oxide Synthase Type III / Q000235:genetics / Q000378:metabolism; D013234:Stem Cells / Q000187:drug effects / Q000378:metabolism; D013311:Streptozocin; D014945:Wound Healing / Q000187:drug effects
chemical_list: D000872:Anthocyanins; D001057:Apolipoproteins E; D005960:Glucosides; C462279:cyanidin-3-O-beta-glucopyranoside; D013311:Streptozocin; D052250:Nitric Oxide Synthase Type III; C496315:Nos3 protein, mouse; D055372:AMP-Activated Protein Kinases; D000109:Acetylcholine