DNA microarray analysis of white adipose tissue from obese (fa/fa) Zucker rats treated with a beta3-adrenoceptor agonist, KTO-7924.

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 Res

journal_title

Pharmacological research

authors

Oana F,Homma T,Takeda H,Matsuzawa A,Akahane S,Isaji M,Akahane M

doi

10.1016/j.phrs.2005.05.014

keywords:

subject

Has Abstract

pub_date

2005-11-01 00:00:00

pages

395-400

issue

5

eissn

1043-6618

issn

1096-1186

pii

S1043-6618(05)00122-2

journal_volume

52

pub_type

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