Geographical distribution of complement receptor type 1 variants and their associated disease risk

PloS One
Thaisa Lucas SandriT P Velavan

Abstract

Pathogens exert selective pressure which may lead to substantial changes in host immune responses. The human complement receptor type 1 (CR1) is an innate immune recognition glycoprotein that regulates the activation of the complement pathway and removes opsonized immune complexes. CR1 genetic variants in exon 29 have been associated with expression levels, C1q or C3b binding and increased susceptibility to several infectious diseases. Five distinct CR1 nucleotide substitutions determine the Knops blood group phenotypes, namely Kna/b, McCa/b, Sl1/Sl2, Sl4/Sl5 and KCAM+/-. CR1 variants were genotyped by direct sequencing in a cohort of 441 healthy individuals from Brazil, Vietnam, India, Republic of Congo and Ghana. The distribution of the CR1 alleles, genotypes and haplotypes differed significantly among geographical settings (p≤0.001). CR1 variants rs17047660A/G (McCa/b) and rs17047661A/G (Sl1/Sl2) were exclusively observed to be polymorphic in African populations compared to the groups from Asia and South-America, strongly suggesting that these two SNPs may be subjected to selection. This is further substantiated by a high linkage disequilibrium between the two variants in the Congolese and Ghanaian populations. A total of ni...Continue Reading

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Citations

Jan 13, 2018·Scientific Reports·Thaisa Lucas SandriThirumalaisamy P Velavan
Mar 23, 2021·Frontiers in Molecular Neuroscience·Nicholas Peoples, Candace Strang

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Software Mentioned

Stata
Haploview
Geneious
Arlequin
GraphPad Prism

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