Effect of age on brown adipose tissue activity in the obese (ob/ob) mouse
| Autor: | Hideki Ohno, Yasushi Fukuwatari, Misa Nishida, M Segawa, Tomomi Ookawara, Nobumasa Ueno, Shuji Oh-ishi, Takako Kizaki |
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| Rok vydání: | 1998 |
| Předmět: |
Male
Aging medicine.medical_specialty Ratón Mice Obese White adipose tissue Mitochondrion Biology Guanosine Diphosphate Mice Adipose Tissue Brown Internal medicine Brown adipose tissue medicine Animals Uncoupling protein RNA Messenger Body Weight Proteins ob/ob mouse medicine.disease Obesity Mice Inbred C57BL Endocrinology medicine.anatomical_structure Ageing Developmental Biology |
| Zdroj: | Mechanisms of Ageing and Development. 100:67-76 |
| ISSN: | 0047-6374 |
| Popis: | Brown adipose tissue (BAT), a highly thermogenic tissue in young animals, is relatively atrophied and thermogenetically quiescent (e.g. as measured by colonic temperature) in mice that are obese or old. The aim of the current study was to investigate the effect of aging (3.1 (young) versus 14.6 (old) months old) on BAT activity in lean and obese (ob/ob) mice. In young but not in old mice, BAT mass in terms of weight per unit body weight was significantly lower in obese mice than in lean mice. A significant increase in BAT mass of obese mice with age was noted in terms of weight or weight per unit body weight, probably because of a tendency to become white adipose tissue and the deposit of fat, accompanied by the lowest levels of total protein, guanosine 5′-diphosphate binding, and uncoupling protein (UCP) antigen in the mitochondria of BAT, as well as the lowest colonic temperature among the groups examined. Unlike old lean animals, the old obese (ob/ob) animals did not increase but rather decreased the expression of mRNA for UCP in the mitochondria of BAT. These findings suggest that a marked decrease in BAT themogenic capacity and activity is noted in old obese mice, probably due to synergism of aging and obesity. |
| Databáze: | OpenAIRE |
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