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  • Title: Fat-specific transgenic expression of resistin in the spontaneously hypertensive rat impairs fatty acid re-esterification.
    Author: Pravenec M, Kazdová L, Cahová M, Landa V, Zídek V, Mlejnek P, Simáková M, Wang J, Qi N, Kurtz TW.
    Journal: Int J Obes (Lond); 2006 Jul; 30(7):1157-9. PubMed ID: 16432541.
    Abstract:
    OBJECTIVE: To investigate the mechanism by which fat-specific transgenic expression of resistin affects fatty acid metabolism in the spontaneously hypertensive rat (SHR). DESIGN: Basal- and adrenaline-stimulated lipolysis, basal- and insulin-stimulated lipogenesis as well as the site (glycerol versus acyl moiety) of glucose incorporated into triglycerides were determined in adipose tissue isolated from SHR-Resistin transgenic and SHR control rats. RESULTS: A moderate expression of transgenic resistin in adipose tissue was associated with significant increase in the FFA/glycerol ratio during adrenaline-stimulated lipolysis in the SHR-Resistin transgenic rats (3.27+/-0.26) compared to SHR controls (2.11+/-0.10, P=0.0005). Transgenic SHR also exhibited a significant decrease in FFA re-esterification in adipose tissue (approximately by 23%). CONCLUSION: These findings raise the possibility that the prodiabetic effects of transgenic resistin may be partly mediated by increased FFA release from adipose tissue due to impaired FFA re-esterification in adipocytes.
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