PMID- 24586567 OWN - NLM STAT- MEDLINE DCOM- 20150127 LR - 20220331 IS - 1932-6203 (Electronic) IS - 1932-6203 (Linking) VI - 9 IP - 2 DP - 2014 TI - Novel CoQ10 antidiabetic mechanisms underlie its positive effect: modulation of insulin and adiponectine receptors, Tyrosine kinase, PI3K, glucose transporters, sRAGE and visfatin in insulin resistant/diabetic rats. PG - e89169 LID - 10.1371/journal.pone.0089169 [doi] LID - e89169 AB - As a nutritional supplement, coenzyme Q10 (CoQ10) was tested previously in several models of diabetes and/or insulin resistance (IR); however, its exact mechanisms have not been profoundly explicated. Hence, the objective of this work is to verify some of the possible mechanisms that underlie its therapeutic efficacy. Moreover, the study aimed to assess the potential modulatory effect of CoQ10 on the antidiabetic action of glimebiride. An insulin resistance/type 2 diabetic model was adopted, in which rats were fed high fat/high fructose diet (HFFD) for 6 weeks followed by a single sub-diabetogenic dose of streptozotocin (35 mg/kg, i.p.). At the end of the 7(th) week animals were treated with CoQ10 (20 mg/kg, p.o) and/or glimebiride (0.5 mg/kg, p.o) for 2 weeks. CoQ10 alone opposed the HFFD effect and increased the hepatic/muscular content/activity of tyrosine kinase (TK), phosphatidylinositol kinase (PI3K), and adiponectin receptors. Conversely, it decreased the content/activity of insulin receptor isoforms, myeloperoxidase and glucose transporters (GLUT4; 2). Besides, it lowered significantly the serum levels of glucose, insulin, fructosamine and HOMA index, improved the serum lipid panel and elevated the levels of glutathione, sRAGE and adiponectin. On the other hand, CoQ10 lowered the serum levels of malondialdehyde, visfatin, ALT and AST. Surprisingly, CoQ10 effect surpassed that of glimepiride in almost all the assessed parameters, except for glucose, fructosamine, TK, PI3K, and GLUT4. Combining CoQ10 with glimepiride enhanced the effect of the latter on the aforementioned parameters. CONCLUSION: These results provided a new insight into the possible mechanisms by which CoQ10 improves insulin sensitivity and adjusts type 2 diabetic disorder. These mechanisms involve modulation of insulin and adiponectin receptors, as well as TK, PI3K, glucose transporters, besides improving lipid profile, redox system, sRAGE, and adipocytokines. The study also points to the potential positive effect of CoQ10 as an adds- on to conventional antidiabetic therapies. FAU - Amin, Mohamed M AU - Amin MM AD - Department of Pharmacology, Medical Division, National Research Center, Cairo, Egypt. FAU - Asaad, Gihan F AU - Asaad GF AD - Department of Pharmacology, Medical Division, National Research Center, Cairo, Egypt. FAU - Abdel Salam, Rania M AU - Abdel Salam RM AD - Department of Pharmacology & Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt. FAU - El-Abhar, Hanan S AU - El-Abhar HS AD - Department of Pharmacology & Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt. FAU - Arbid, Mahmoud S AU - Arbid MS AD - Department of Pharmacology, Medical Division, National Research Center, Cairo, Egypt. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20140220 PL - United States TA - PLoS One JT - PloS one JID - 101285081 RN - 0 (Glucose Transport Proteins, Facilitative) RN - 0 (Hypoglycemic Agents) RN - 0 (Membrane Proteins) RN - 0 (Receptor for Advanced Glycation End Products) RN - 0 (Receptors, Adiponectin) RN - 0 (Receptors, Immunologic) RN - 1339-63-5 (Ubiquinone) RN - EC 1.11.1.7 (Peroxidase) RN - EC 2.- (Transferases) RN - EC 2.4.2.12 (Nicotinamide Phosphoribosyltransferase) RN - EC 2.7.1.- (Phosphatidylinositol 3-Kinases) RN - EC 2.7.10.1 (Protein-Tyrosine Kinases) RN - EC 2.7.10.1 (Receptor, Insulin) RN - EJ27X76M46 (coenzyme Q10) SB - IM MH - Animals MH - Diabetes Mellitus, Experimental/*drug therapy/enzymology/*metabolism MH - Drug Interactions MH - Glucose Transport Proteins, Facilitative/metabolism MH - Hypoglycemic Agents/*pharmacology/therapeutic use MH - *Insulin Resistance MH - Liver/drug effects/metabolism MH - Male MH - Membrane Proteins/*metabolism MH - Muscle, Skeletal/drug effects/metabolism MH - Nicotinamide Phosphoribosyltransferase/metabolism MH - Peroxidase/metabolism MH - Phosphatidylinositol 3-Kinases/metabolism MH - Protein-Tyrosine Kinases/metabolism MH - Rats MH - Receptor for Advanced Glycation End Products MH - Receptor, Insulin/metabolism MH - Receptors, Adiponectin/metabolism MH - Receptors, Immunologic/chemistry/metabolism MH - Transferases/*metabolism MH - Ubiquinone/*analogs & derivatives/pharmacology/therapeutic use PMC - PMC3930675 COIS- Competing Interests: The authors have declared that no competing interests exist. EDAT- 2014/03/04 06:00 MHDA- 2015/01/28 06:00 PMCR- 2014/02/20 CRDT- 2014/03/04 06:00 PHST- 2013/09/15 00:00 [received] PHST- 2014/01/16 00:00 [accepted] PHST- 2014/03/04 06:00 [entrez] PHST- 2014/03/04 06:00 [pubmed] PHST- 2015/01/28 06:00 [medline] PHST- 2014/02/20 00:00 [pmc-release] AID - PONE-D-13-37921 [pii] AID - 10.1371/journal.pone.0089169 [doi] PST - epublish SO - PLoS One. 2014 Feb 20;9(2):e89169. doi: 10.1371/journal.pone.0089169. eCollection 2014.