Association of FCN2 polymorphisms and Ficolin-2 levels with dengue fever in Vietnamese patients.
2020
Abstract Background and Objective The human ficolin-2, encoded by FCN2, recognizes pathogen-associated acetylated residues on their cell surfaces and activates the lectin complement cascade. This study aimed to investigate the contribution of human ficolin-2 and the functional FCN2 genetic variants in dengue virus (DENV) infection and in clinical progression. Methods FCN2 genetic polymorphisms in the promoter, intron 7 and exon 8 were genotyped in 279 patients with dengue fever and in 200 healthy controls by direct Sanger sequencing. The ficolin-2 levels were measured in serum samples by ELISA and correlated with clinical data. Results The frequencies of +6031GG, +6220GG and +6424TT genotypes were significantly higher in dengue patients compared to healthy controls indicating an increased risk of dengue fever. The SNPs rs11103563 (+6031A/G), rs7872508 (+6220 T/G), and rs7851696 (+6424 G/T) significantly regulated ficolin-2 levels in dengue patients (P Conclusions FCN2 polymorphisms are associated with dengue fever in the Vietnamese population. Ficolin-2 levels are modulated during the progression of dengue fever and correlated with clinical parameters and thus may play a possible role in the pathogenesis of DENV infection.
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