Abstract
Functional variations in the mannose-binding lectin (MBL2) gene causing low levels of serum MBL are associated with susceptibility to numerous infectious diseases. We investigated whether there is genetic association of MBL2 variant alleles with cutaneous leishmaniasis (CL) caused by Leishmania guyanensis. We used PCR-restriction fragment length polymorphism to genotype six MBL2 variants, three in the promoter region and three in the exon 1. An association was noted between the single nucleotide polymorphism −221X/Y of the MBL2 gene and CL (P=2.9 × 10−6; odds ratio (OR)=1.9 (1.4–2.5) consistent with the hypothesis that the −221X allele confers high risk to development of CL among L. guyanensis-infected individuals. Furthermore, L. guyanensis-infected individuals bearing the codon 57 allele C had a higher risk of developing CL (P=5 × 10−5; OR=1.9 (1.4–2.6)). The low MBL expressor haplotype LXPB was also associated to CL (P=6 × 10−4). This study raises the possibility that functional polymorphisms in MBL2 gene play a role in clinical outcome of Leishmania infection.
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Acknowledgements
This work was funded by the Brazilian Council for Scientific and technological Development (CNPq) to RR (grant number: Processo 404181/2012-0).
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de Araujo, F., Mesquita, T., da Silva, L. et al. Functional variations in MBL2 gene are associated with cutaneous leishmaniasis in the Amazonas state of Brazil. Genes Immun 16, 284–288 (2015). https://doi.org/10.1038/gene.2015.6
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DOI: https://doi.org/10.1038/gene.2015.6