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    J Biol Chem. 1991 Dec 15;266(35):24053-8.

    An adipose tissue-specific beta-adrenergic receptor. Molecular cloning and down-regulation in obesity.

    Muzzin P, Revelli JP, Kuhne F, Gocayne JD, McCombie WR, Venter JC, Giacobino JP, Fraser CM.

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    Departement de Biochimie Medicale, Centre Medical Universitaire, Geneve, Switzerland.

    Abstract

    Clones encoding an atypical beta-adrenergic receptor were isolated from a rat brown adipose tissue cDNA library. This receptor expressed in Chinese hamster ovary (CHO) cells displays a low affinity for beta-adrenergic antagonists and a high affinity for BRL 37344, an agonist that selectively stimulates lipolysis in adipose tissue. The rank order of potency for agonist-mediated increases in intracellular cAMP in transfected cells correlates with that for agonist-mediated stimulation of lipolysis in brown adipocytes. Northern blot analysis demonstrates that this receptor subtype is expressed only in brown and white adipose tissue where it represents the predominant beta-receptor subtype. The amount of atypical beta-adrenergic receptor present in adipose tissue of obese (fa/fa) Zucker rats is reduced by up to 71% as compared with lean (Fa/Fa) control animals. These findings suggest that a change in the expression of this beta-adrenergic receptor subtype may play a role in obesity.

    PMID:
    1721063
    [PubMed - indexed for MEDLINE]

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