African Americans have a significantly higher risk of developing chronic kidney disease, especially focal segmental glomerulosclerosis -, than European Americans. Two coding variants (G1 and G2) in the APOL1 gene play a major role in this disparity. While 13% of African Americans carry the high-risk recessive genotypes, only a fraction of these individuals develops FSGS or kidney failure, indicating the involvement of additional disease modifiers. Here, we show that the presence of the APOL1 p.N264K missense variant, when co-inherited with the G2 APOL1 risk allele, substantially reduces the penetrance of the G1G2 and G2G2 high-risk genotypes by rendering these genotypes low-risk. These results align with prior functional evidence showing that the p.N264K variant reduces the toxicity of the APOL1 high-risk alleles. These findings have important implications for our understanding of the mechanisms of APOL1-associated nephropathy, as well as for the clinical management of individuals with high-risk genotypes that include the G2 allele.

Strong protective effect of the APOL1 p.N264K variant against G2-associated focal segmental glomerulosclerosis and kidney disease / Gupta, Y., Friedman, D.J., Mcnulty, M.T., Khan, A., Lane, B., Wang, C., Ke, J., Jin, G., Wooden, B., Knob, A.L., Lim, T.Y., Appel, G.B., Huggins, K., Liu, L., Mitrotti, A., Stangl, M.C., Bomback, A., Westland, R., Bodria, M., Marasa, M., et al.. - In: NATURE COMMUNICATIONS. - ISSN 2041-1723. - 14:1(2023), pp. 7836.1-7836.8. [10.1038/s41467-023-43020-9]

Strong protective effect of the APOL1 p.N264K variant against G2-associated focal segmental glomerulosclerosis and kidney disease

Bodria M.;Rao M.;Pisani I.;Fiaccadori E.;Amoroso A.;
2023-01-01

Abstract

African Americans have a significantly higher risk of developing chronic kidney disease, especially focal segmental glomerulosclerosis -, than European Americans. Two coding variants (G1 and G2) in the APOL1 gene play a major role in this disparity. While 13% of African Americans carry the high-risk recessive genotypes, only a fraction of these individuals develops FSGS or kidney failure, indicating the involvement of additional disease modifiers. Here, we show that the presence of the APOL1 p.N264K missense variant, when co-inherited with the G2 APOL1 risk allele, substantially reduces the penetrance of the G1G2 and G2G2 high-risk genotypes by rendering these genotypes low-risk. These results align with prior functional evidence showing that the p.N264K variant reduces the toxicity of the APOL1 high-risk alleles. These findings have important implications for our understanding of the mechanisms of APOL1-associated nephropathy, as well as for the clinical management of individuals with high-risk genotypes that include the G2 allele.
2023
Strong protective effect of the APOL1 p.N264K variant against G2-associated focal segmental glomerulosclerosis and kidney disease / Gupta, Y., Friedman, D.J., Mcnulty, M.T., Khan, A., Lane, B., Wang, C., Ke, J., Jin, G., Wooden, B., Knob, A.L., Lim, T.Y., Appel, G.B., Huggins, K., Liu, L., Mitrotti, A., Stangl, M.C., Bomback, A., Westland, R., Bodria, M., Marasa, M., et al.. - In: NATURE COMMUNICATIONS. - ISSN 2041-1723. - 14:1(2023), pp. 7836.1-7836.8. [10.1038/s41467-023-43020-9]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/3034374
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