Comparison of Atypical /33-Adrenoceptor Agonists With Their Respective Metabolic Activities in Rat White Adipocytes
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概要
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The metabolic activities of four types of β3-adrenoceptor (AR) agonists, BRL35135A, BRL28410, ICI215001 and CL316243, were compared with those of other β1- and β2-AR agonists in rat white adipocytes. All the β3-AR agonists caused cAMP formation, free fatty acid release and 2-deoxyglucose uptake; the maximum activity levels were similar except for ICI215001, which was lower. However, the magnitude of potency and selectivity of these agonists differed. The most potent and selective β3-agonist was CL316243. Metabolic activities and Northern blotting showed that there were three β-AR subtypes that were coupled to adenylyl cyclase and contributed to the induction of lipolysis and glucose uptake. The rank order of the amounts of β-AR subtypes was β3>>β1 > β2. However, the physiological functions of β-AR subtypes were essentially similar in rat white adipocytes. On the other hand, cAMP accumulation and Northern blotting showed that human adipocytes predominantly contained β2-AR, with far lower levels of β1- and β3-ARs. These findings suggested that the β3-AR plays an important role in energy metabolism and thermogenesis in which cross talk exists between β1- and β3-ARs in rat adipocytes, while β2-AR is the most important for the lipolysis regulation in human subcutaneous adipocytes.
- 社団法人 日本薬理学会の論文
- 1998-05-01
著者
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Murakami Takeshi
Department Of Accelerator And Medical Physics National Institute Of Radiological Sciences
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Yoshida Toshihide
First Departmen T Of Internal Medicine Kyoto Prefectural University Of Medicine
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Tokumitsu Yukiko
Department Of Ph Ysiological Chemistry Faculty Of Pharmaceutical Sciences Hokkaido University
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OHSAKA Yasuhito
Department of Ph ysiological Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University
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Ohsaka Yasuhito
Department Of Ph Ysiological Chemistry Faculty Of Pharmaceutical Sciences Hokkaido University
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Murakami Takeshi
Department Of Clinical Biochemistry Hokkaido University School Of Medicine
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