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Structure and function of the beta 3-adrenergic receptor
1Institut Cochin de Génétique Moléculaire, Laboratoire d'Immuno-Pharmacologie Moléculaire, CNRS UPR 0415, Paris, France.
Annual Review of Pharmacology and Toxicology
|January 1, 1997
Summary
The beta 3-adrenergic receptor plays a key role in regulating lipid metabolism. Genetic variants and disruptions in this receptor are linked to obesity and non-insulin-dependent diabetes mellitus.
Area of Science:
- Pharmacology
- Molecular Biology
- Genetics
Background:
- The beta 3-adrenergic receptor (β3-AR) is a distinct subtype of adrenoceptors.
- Its structural and functional characteristics differ significantly from β1- and β2-AR subtypes.
- Earlier pharmacologic studies reported atypical responses now understood to be β3-AR mediated.
Purpose of the Study:
- To elucidate the role of the beta 3-adrenergic receptor in metabolic regulation.
- To investigate the association of β3-AR variants with obesity and non-insulin-dependent diabetes mellitus (NIDDM).
Main Methods:
- Ligand binding assays to characterize receptor affinity.
- Adenylyl cyclase activation studies to assess functional responses.
- Genetic analysis of human populations and gene disruption in mice.
Main Results:
- Human, mammalian, and rodent β3-AR share common properties, with species-specific variations.
- Naturally occurring human β3-AR variants correlate with hereditary obesity and NIDDM in various ethnic groups.
- Gene disruption of β3-AR in female mice led to mild weight gain.
Conclusions:
- The beta 3-adrenoceptor is crucial for regulating lipid metabolism.
- β3-AR is a significant therapeutic target for managing obesity and related metabolic disorders like NIDDM.