title: Miglitol protects against age-dependent weight gain in mice: A potential role of increased UCP1 content in brown adipose tissue.
abstract: Miglitol is an absorbable alpha-glucosidase inhibitor that is used to control post-prandial hyperglycemia. We previously found that miglitol stimulates brown adipose tissue and prevents diet-induced obesity in mice that are fed a high-fat, high-carbohydrate diet. In this study, we examined whether miglitol can also protect against aging-dependent weight gain in mice that are fed a normal chow diet. Male C57Bl/6J mice were fed normal chow with or without miglitol (800 ppm) for 12 weeks, starting at 12 weeks of age. Food intake and body weight were monitored. After 12 weeks, adiposity, energy expenditure, and locomotor activities were measured. After sacrifice, weight of the epididymal white adipose tissue and adipocyte size were measured. Finally, Ucp1 gene expression and UCP1 protein abundance in brown adipose tissue were quantified by RT-PCR and Western analyses, respectively. Miglitol prevented age-related weight gain without affecting growth of the animals. Miglitol-treated mice showed reduced adiposity and increased oxygen consumption compared to controls, accompanied by higher UCP1 protein abundance in brown adipose tissue. Food intake and locomotor activities were not affected. These results suggest that miglitol can protect against age-dependent weight gain. Elucidating the molecular targets of miglitol in brown adipose tissue and optimizing drug delivery and efficacy may provide new strategies to combat obesity.
authors.affiliation: Laboratory of Metabolic Signal, Institute of Molecular and Cellular Regulation, Gunma University, Maebashi, Gunma, 371-8512, Japan.
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Sasaki
authors.forename: Haruna
authors.initials: H
authors.lastname: Hiraga
authors.forename: Hiromi
authors.initials: H
authors.lastname: Yokota-Hashimoto
authors.forename: Tadahiro
authors.initials: T
authors.lastname: Kitamura
mesh_terms: D017485:1-Deoxynojirimycin / Q000008:administration & dosage / Q000031:analogs & derivatives*; D002001:Adipose Tissue, Brown / Q000737:chemistry*; D050154:Adiposity / Q000187:drug effects; D000375:Aging / Q000502:physiology*; D000818:Animals; D004032:Diet; D004734:Energy Metabolism / Q000187:drug effects; D015870:Gene Expression / Q000187:drug effects; D007004:Hypoglycemic Agents; D007473:Ion Channels / Q000032:analysis* / Q000235:genetics / Q000502:physiology; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D024101:Mitochondrial Proteins / Q000032:analysis* / Q000235:genetics / Q000502:physiology; D009043:Motor Activity / Q000187:drug effects; D009765:Obesity / Q000209:etiology / Q000517:prevention & control; D010101:Oxygen Consumption / Q000187:drug effects; D000071256:Uncoupling Protein 1; D015430:Weight Gain / Q000187:drug effects*
chemical_list: D007004:Hypoglycemic Agents; D007473:Ion Channels; D024101:Mitochondrial Proteins; C000604372:Ucp1 protein, mouse; D000071256:Uncoupling Protein 1; C045621:miglitol; D017485:1-Deoxynojirimycin