Abstract:
:We aimed to examine the effects of KTO-7924 (beta3-adrenoceptor agonist) on lipid metabolism and mRNA expressions in retroperitoneal white adipose tissue (RP WAT) in obese (fa/fa) Zucker rats using DNA microarray. Oral KTO-7924 for 28 days significantly decreased RP WAT weight, plasma triglyceride, free fatty acid, and insulin, and improved insulin resistance in oral glucose tolerance tests. In RP WAT of KTO-7924-treated rats, DNA microarray analysis revealed specifically enhanced mRNA expressions of uncoupling protein 1 (UCP1) and cytochrome c oxidase subunit VIII-H (COX8H), which are reportedly highly expressed in brown adipose tissue (BAT). Since these mRNA expression levels in RP WAT were significantly lower in obese (fa/fa) Zucker rats than in lean Zucker rats, these genes may be important in lipid metabolism. Our results imply that in obese (fa/fa) Zucker rats, continuous stimulation of beta3-adrenoceptors by KTO-7924 causes BAT-like adipocytes to appear in RP WAT, and improves lipid metabolism.
journal_name
Pharmacol Resjournal_title
Pharmacological researchauthors
Oana F,Homma T,Takeda H,Matsuzawa A,Akahane S,Isaji M,Akahane Mdoi
10.1016/j.phrs.2005.05.014keywords:
subject
Has Abstractpub_date
2005-11-01 00:00:00pages
395-400issue
5eissn
1043-6618issn
1096-1186pii
S1043-6618(05)00122-2journal_volume
52pub_type
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