Genetic Variations in β3-Adrenergic Receptor and Metabolic Disorders

β3-Adrenergic receptor (β3-AR) is a G protein-coupled receptor predominantly expressed in adipose tissue where it orchestrates lipolysis and adaptive thermogenesis. Genetic variations in the ADRB3 gene, most notably the Trp64Arg (W64R) polymorphism, have been implicated in obesity, type 2 diabetes and dyslipidaemia. The Arg64 allele correlates with reduced resting metabolic rate, impaired fat oxidation and altered adipokine profiles, thereby promoting adiposity and insulin resistance. At the cellular level, β3-AR signalling elevates cyclic AMP to drive brown and beige adipocyte differentiation, enhance energy expenditure and maintain glucose homeostasis. Variants that alter receptor expression, desensitisation or downstream signalling can shift the energy balance towards storage, exacerbating metabolic risk. Insights into these genetic influences inform risk stratification, personalised interventions and the development of β3-AR–targeted therapies to alleviate the global burden of metabolic disorders.

Research from Nature Portfolio

Recent studies have revealed how transcriptional control of β3-AR abundance modulates systemic metabolism. In mouse models, adipose-specific deletion of a key transcriptional repressor led to upregulated β3-AR expression in brown and beige fat, increased adaptive thermogenesis and protection against diet-induced obesity and insulin resistance. Conversely, overexpression of the same factor suppressed receptor levels, blunted thermogenic programmes and predisposed animals to metabolic dysfunction. These findings demonstrate a direct molecular mechanism by which transcriptional regulation of ADRB3 fine-tunes energy expenditure and metabolic health.

Genetic Variations in β3-Adrenergic Receptor and Metabolic Disorders publication trend

The graph below shows the total number of articles in genetic variations in β3-adrenergic receptor and metabolic disorders across all publications each year (not limited to Nature Index journals).

Technical terms

β3-Adrenergic receptor (β3-AR): A G protein-coupled receptor in adipocytes that mediates lipolysis and heat production upon catecholamine binding.

Trp64Arg (W64R) polymorphism: A single-nucleotide change in ADRB3 resulting in tryptophan being replaced by arginine at position 64, associated with altered metabolic traits.

Cyclic AMP (cAMP): A second messenger generated by adenylate cyclase activation that regulates key metabolic pathways in adipocytes.

Beige adipocyte: A subtype of white adipose cell capable of acquiring brown-fat characteristics and thermogenic capacity under sympathetic stimulation.

Adipokines: Bioactive peptides secreted by adipose tissue, such as leptin and adiponectin, that influence systemic energy homeostasis and insulin sensitivity.

References

1. Foxp1 controls brown/beige adipocyte differentiation and thermogenesis through regulating β3-AR desensitization. Nature Communications (2019).
2. An association between TRP64ARG polymorphism of the B3 adrenoreceptor gene and some metabolic disturbances. Cardiovascular Diabetology (2011).
3. Trp64Arg Polymorphism in Beta3‐Adrenergic Receptor Gene Is Associated with Decreased Fat Oxidation Both in Resting and Aerobic Exercise in the Japanese Male. Journal of Diabetes Research (2009).
4. The Trp64Arg polymorphism in β3 adrenergic receptor (ADRB3) gene is associated with adipokines and plasma lipids: a systematic review, meta-analysis, and meta-regression. Lipids in Health and Disease (2020).
5. The ADRB3 rs4994 polymorphism increases risk of childhood and adolescent overweight/obesity for East Asia’s population: an evidence-based meta-analysis. Adipocyte (2020).
6. Functional Characterization of the Obesity-Linked Variant of the β3-Adrenergic Receptor. International Journal of Molecular Sciences (2021).