Glycemic traits are used to diagnose and monitor type 2 diabetes and cardiometabolic health. To date, most genetic studies of glycemic traits have focused on individuals of European ancestry. Here we aggregated genome-wide association studies comprising up to 281,416 individuals without diabetes (30% non-European ancestry) for whom fasting glucose, 2-h glucose after an oral glucose challenge, glycated hemoglobin and fasting insulin data were available. Trans-ancestry and single-ancestry meta-analyses identified 242 loci (99 novel; P < 5 × 10−8), 80% of which had no significant evidence of between-ancestry heterogeneity. Analyses restricted to individuals of European ancestry with equivalent sample size would have led to 24 fewer new loci. Compared with single-ancestry analyses, equivalent-sized trans-ancestry fine-mapping reduced the number of estimated variants in 99% credible sets by a median of 37.5%. Genomic-feature, gene-expression and gene-set analyses revealed distinct biological signatures for each trait, highlighting different underlying biological pathways. Our results increase our understanding of diabetes pathophysiology by using trans-ancestry studies for improved power and resolution.

The trans-ancestral genomic architecture of glycemic traits / Chen, J., Spracklen, C.N., Marenne, G., Varshney, A., Corbin, L.J., Luan, J., Willems, S.M., Wu, Y., Zhang, X., Horikoshi, M., Boutin, T.S., Magi, R., Waage, J., Li-Gao, R., Chan, K.H.K., Yao, J., Anasanti, M.D., Chu, A.Y., Claringbould, A., Heikkinen, J., et al.. - In: NATURE GENETICS. - ISSN 1061-4036. - 53:6(2021), pp. 840-860. [10.1038/s41588-021-00852-9]

The trans-ancestral genomic architecture of glycemic traits

Mangino M.;Pistis G.;Cucca F.;Ferrucci L.;
2021-01-01

Abstract

Glycemic traits are used to diagnose and monitor type 2 diabetes and cardiometabolic health. To date, most genetic studies of glycemic traits have focused on individuals of European ancestry. Here we aggregated genome-wide association studies comprising up to 281,416 individuals without diabetes (30% non-European ancestry) for whom fasting glucose, 2-h glucose after an oral glucose challenge, glycated hemoglobin and fasting insulin data were available. Trans-ancestry and single-ancestry meta-analyses identified 242 loci (99 novel; P < 5 × 10−8), 80% of which had no significant evidence of between-ancestry heterogeneity. Analyses restricted to individuals of European ancestry with equivalent sample size would have led to 24 fewer new loci. Compared with single-ancestry analyses, equivalent-sized trans-ancestry fine-mapping reduced the number of estimated variants in 99% credible sets by a median of 37.5%. Genomic-feature, gene-expression and gene-set analyses revealed distinct biological signatures for each trait, highlighting different underlying biological pathways. Our results increase our understanding of diabetes pathophysiology by using trans-ancestry studies for improved power and resolution.
2021
The trans-ancestral genomic architecture of glycemic traits / Chen, J., Spracklen, C.N., Marenne, G., Varshney, A., Corbin, L.J., Luan, J., Willems, S.M., Wu, Y., Zhang, X., Horikoshi, M., Boutin, T.S., Magi, R., Waage, J., Li-Gao, R., Chan, K.H.K., Yao, J., Anasanti, M.D., Chu, A.Y., Claringbould, A., Heikkinen, J., et al.. - In: NATURE GENETICS. - ISSN 1061-4036. - 53:6(2021), pp. 840-860. [10.1038/s41588-021-00852-9]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11388/346512
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