Functional Haplotypes of Fc Gamma (Fcy) Receptor (FcyRIIA and FcyRIIB) Predict Risk to Repeated Episodes of Severe Malarial Anaemia and Mortality in Kenyan...
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Development of protective immunity against Plasmodium falciparum is partially mediated through binding of malaria-specific IgG to Fc gamma (γ) receptors. Variations in human FcγRIIA-H/R-131 and FcγRIIIB-NA1/NA2 affect differential binding of IgG sub-classes. Since variability in FcγR may play an important role in severe malarial anemia (SMA) pathogenesis by mediating phagocytosis of red blood cells and triggering cytokine production, the relationship between FcγRIIA-H/R131 and FcγRIIIB-NA1/NA2 haplotypes and susceptibility to SMA (Hb< 6.0 g/dL) was investigated in Kenyan children (n= 528) with acute malaria residing in a holoendemic P. falciparum transmission region. In addition, the association between carriage of the haplotypes and repeated episodes of SMA and all- cause mortality were investigated over a 3-year follow-up period. Since variability in FcγR …