title: Cyanidin 3-glucoside improves diet-induced metabolic syndrome in rats.
abstract: Increased consumption of dark-coloured fruits and vegetables may mitigate metabolic syndrome. This study has determined the changes in metabolic parameters, and in cardiovascular and liver structure and function, following chronic administration of either cyanidin 3-glucoside (CG) or Queen Garnet plum juice (QG) containing cyanidin glycosides to rats fed either a corn starch (C) or a high-carbohydrate, high-fat (H) diet. Eight to nine-week-old male Wistar rats were randomly divided into six groups for 16-week feeding with C, C with CG or QG, H or H with CG or QG. C or H were supplemented with CG or QG at a dose of ∼ 8 mg/kg/day cyanidin glycosides from week 8 to 16. H rats developed signs of metabolic syndrome including visceral adiposity, impaired glucose tolerance, hypertension, cardiovascular remodelling, increased collagen deposition in left ventricle, non-alcoholic fatty liver disease, increased plasma liver enzymes and increased inflammatory cell infiltration in the heart and liver. Both CG and QG reversed these cardiovascular, liver and metabolic signs. However, no intact anthocyanins or common methylated/conjugated metabolites could be detected in the plasma samples and plasma hippuric acid concentrations were unchanged. Our results suggest CG is the most likely mediator of the responses to QG but that further investigation of the pharmacokinetics of oral CG in rats is required.
authors.affiliation: Centre for Chronic Disease Prevention and Management, College of Health & Biomedicine, Victoria University, Melbourne, Australia; School of Health and Wellbeing, University of Southern Queensland, Toowoomba, Australia.
authors.forename: Maharshi
authors.initials: M
authors.lastname: Bhaswant
authors.affiliation: Department of Agriculture and Fisheries, Coopers Plains, Queensland, Australia.
authors.forename: Kent
authors.initials: K
authors.lastname: Fanning
authors.affiliation: Centre for Nutrition and Food Sciences, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Australia.
authors.forename: Michael
authors.initials: M
authors.lastname: Netzel
authors.affiliation: Centre for Chronic Disease Prevention and Management, College of Health & Biomedicine, Victoria University, Melbourne, Australia.
authors.forename: Michael L
authors.initials: ML
authors.lastname: Mathai
authors.affiliation: Institute for Agriculture and the Environment, University of Southern Queensland, Toowoomba, Australia.
authors.forename: Sunil K
authors.initials: SK
authors.lastname: Panchal
authors.affiliation: School of Health and Wellbeing, University of Southern Queensland, Toowoomba, Australia; Institute for Agriculture and the Environment, University of Southern Queensland, Toowoomba, Australia. Electronic address: Lindsay.Brown@usq.edu.au.
authors.forename: Lindsay
authors.initials: L
authors.lastname: Brown
mesh_terms: D000818:Animals; D000872:Anthocyanins / Q000494:pharmacology*; D002319:Cardiovascular System / Q000187:drug effects / Q000378:metabolism; D059305:Diet, High-Fat / Q000009:adverse effects*; D004040:Dietary Carbohydrates / Q000009:adverse effects; D004041:Dietary Fats / Q000009:adverse effects; D019587:Dietary Supplements; D000067030:Fruit and Vegetable Juices; D005960:Glucosides / Q000494:pharmacology*; D006973:Hypertension / Q000188:drug therapy / Q000378:metabolism; D008099:Liver / Q000187:drug effects / Q000378:metabolism; D008297:Male; D024821:Metabolic Syndrome / Q000188:drug therapy* / Q000378:metabolism; D065626:Non-alcoholic Fatty Liver Disease / Q000188:drug therapy / Q000378:metabolism; D000068242:Prunus domestica / Q000737:chemistry; D051381:Rats; D017208:Rats, Wistar
chemical_list: D000872:Anthocyanins; D004040:Dietary Carbohydrates; D004041:Dietary Fats; D005960:Glucosides; C462279:cyanidin-3-O-beta-glucopyranoside
keywords: Anthocyanins; Cyanidin 3-glucoside; Inflammation; Metabolic syndrome; Obesity; Queen Garnet plum