Protein-truncating variants in BSNare associated with severe adult-onset obesity, type 2 diabetes and fatty liver disease

Autor: Zhao, Yajie, Chukanova, Maria, Kentistou, Katherine A., Fairhurst-Hunter, Zammy, Siegert, Anna Maria, Jia, Raina Y., Dowsett, Georgina K. C., Gardner, Eugene J., Lawler, Katherine, Day, Felix R., Kaisinger, Lena R., Tung, Yi-Chun Loraine, Lam, Brian Yee Hong, Chen, Hsiao-Jou Cortina, Wang, Quanli, Berumen-Campos, Jaime, Kuri-Morales, Pablo, Tapia-Conyer, Roberto, Alegre-Diaz, Jesus, Barroso, Inês, Emberson, Jonathan, Torres, Jason M., Collins, Rory, Saleheen, Danish, Smith, Katherine R., Paul, Dirk S., Merkle, Florian, Farooqi, I. Sadaf, Wareham, Nick J., Petrovski, Slavé, O’Rahilly, Stephen, Ong, Ken K., Yeo, Giles S. H., Perry, John R. B.
Zdroj: Nature Genetics; April 2024, Vol. 56 Issue: 4 p579-584, 6p
Abstrakt: Obesity is a major risk factor for many common diseases and has a substantial heritable component. To identify new genetic determinants, we performed exome-sequence analyses for adult body mass index (BMI) in up to 587,027 individuals. We identified rare loss-of-function variants in two genes (BSNand APBA1) with effects substantially larger than those of well-established obesity genes such as MC4R. In contrast to most other obesity-related genes, rare variants in BSNand APBA1were not associated with normal variation in childhood adiposity. Furthermore, BSNprotein-truncating variants (PTVs) magnified the influence of common genetic variants associated with BMI, with a common variant polygenic score exhibiting an effect twice as large in BSNPTV carriers than in noncarriers. Finally, we explored the plasma proteomic signatures of BSNPTV carriers as well as the functional consequences of BSNdeletion in human induced pluripotent stem cell-derived hypothalamic neurons. Collectively, our findings implicate degenerative processes in synaptic function in the etiology of adult-onset obesity.
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