Up-regulation of muscle UCP2 gene expression by a new beta3- adrenoceptor agonist, trecadrine, in obese (cafeteria) rodents, but down-regulation in lean animals. - Berraondo,B.; Marti,A.; Duncan,J.S.; Trayhurn,P.; Martinez,J.A. (Int J Obes Relat Metab Disord, 2000)