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- W4200082284 abstract "Genome-wide association studies (GWAS) for severe malaria have identified 30 genetic variants that are mostly located in non-coding regions, with only a few associations replicated in independent populations. In this study, we aimed at identifying potential causal genetic variants located in these loci and demonstrate their functional activity. We systematically investigated the regulatory effect of the SNPs in linkage disequilibrium with the tagSNPs associated with severe malaria in several populations. Annotating and prioritizing genetic variants led to the identification of a regulatory region containing 5 ATP2B4 SNPs in linkage disequilibrium with the tagSNP rs10900585. We confirmed the association of rs10900585 and also found significant associations of severe malaria with our candidate SNPs (rs11240734, rs1541252, rs1541253, rs1541254, and rs1541255) in a Senegalese population. Then, we showed that this region had both promoter and enhancer activities and that both individual SNPs and the combination of SNPs had regulatory effects using luciferase reporter assays. Moreover, CRISPR/Cas9-mediated deletion of this region decreased ATP2B4 transcript and protein levels and increased Ca2+ intracellular concentration in the K562 cell line. Taken together, our data show that severe malaria-associated genetic variants alter the activity of a promoter with enhancer function. We showed that this regulatory element controls the expression of ATP2B4 that encodes a plasma membrane calcium-transporting ATPase 4 (PMCA4), which is the major calcium pump on red blood cells. Altering the activity of this regulatory element affects the risk of severe malaria probably through calcium concentration effect on parasitaemia." @default.
- W4200082284 created "2021-12-31" @default.
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- W4200082284 date "2021-12-05" @default.
- W4200082284 modified "2023-10-16" @default.
- W4200082284 title "Identification of ATP2B4 regulatory element containing functional genetic variants associated with severe malaria" @default.
- W4200082284 doi "https://doi.org/10.1101/2021.12.03.21267245" @default.
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