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  • Title: Cloning, expression, and mapping of a gene that is upregulated in adipose tissue of mice deficient in bombesin receptor subtype-3.
    Author: Aoki K, Sun YJ, Aoki S, Wada K, Wada E.
    Journal: Biochem Biophys Res Commun; 2002 Feb 01; 290(4):1282-8. PubMed ID: 11812002.
    Abstract:
    To identify novel obesity-related genes in adipose tissue, differential display was performed using bombesin receptor subtype-3 (BRS-3)-deficient mice. These mice exhibit mild late-onset obesity. We report that a gene, Urb, is upregulated in these mice. Full-length Urb cDNA is approximately 3 kb long and comprises an open reading frame of 949 amino acid residues. Interestingly, Urb mRNA expression in brown adipose tissue of BRS-3-deficient mice is fourfold higher than that in wild-type controls. Enhanced Urb mRNA expression was also observed in brain, digestive tissues, kidney, and lung. Within the brain, Urb mRNA is detected in the dorsal endopiriform nucleus and choroid plexus. A T31 radiation hybrid mapping panel revealed that the Urb gene maps to mouse chromosome 16. Collectively, these findings suggest that Urb may have a unique function in the regulation of body weight and energy metabolism.
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