SR 59230A hydrochloride is a selective and potent antagonist of β3 adrenoceptor, with IC50 values being 40, 408, and 648 nM for β3, β1, and β2 adrenergic receptors, respectively. β3 adrenoceptor, predominately located in adipose tissue, is mainly responsible for the regulation of lipolysis and thermogenesis. In addition, β3 adrenoceptor has also been found to be involved in different tumor conditions, such as neuroblastoma, via the regulation of the bioactive lipid sphingosine 1-phosphate metabolism and signaling.
References:
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