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Lotta, Luca A.; Mokrosiński, Jacek; Mendes de Oliveira, Edson; Li, Chen; Sharp, Stephen J.; Luan, Jian’an; Brouwers, Bas; Ayinampudi, Vikram; Bowker, Nicholas; Kerrison, Nicola; Kaimakis, Vasileios; Hoult, Diana; Stewart, Isobel D.; Wheeler, Eleanor; Day, Felix R.; Perry, John R.B.; Langenberg, Claudia; Wareham, Nicholas J.; Farooqi, I. Sadaf
Cell, 04/2019, Letnik: 177, Številka: 3Journal Article
The melanocortin 4 receptor (MC4R) is a G protein-coupled receptor whose disruption causes obesity. We functionally characterized 61 MC4R variants identified in 0.5 million people from UK Biobank and examined their associations with body mass index (BMI) and obesity-related cardiometabolic diseases. We found that the maximal efficacy of β-arrestin recruitment to MC4R, rather than canonical Gαs-mediated cyclic adenosine-monophosphate production, explained 88% of the variance in the association of MC4R variants with BMI. While most MC4R variants caused loss of function, a subset caused gain of function; these variants were associated with significantly lower BMI and lower odds of obesity, type 2 diabetes, and coronary artery disease. Protective associations were driven by MC4R variants exhibiting signaling bias toward β-arrestin recruitment and increased mitogen-activated protein kinase pathway activation. Harnessing β-arrestin-biased MC4R signaling may represent an effective strategy for weight loss and the treatment of obesity-related cardiometabolic diseases. Display omitted •61 variants in the Melanocortin-4 Receptor gene were found in 0.5 million people•Variants causing a gain of function were associated with protection from obesity•Variants biased toward β-arrestin signaling mediated the protective effects Gain-of-function genetic variants in the Melanocortin-4 Receptor associated with protection against obesity exhibit signaling bias for the recruitment of β-arrestin rather than canonical Gαs-mediated cAMP production.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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