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Mannose-binding lectin gene polymorphisms in the East Siberia and Russian Arctic populations

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Abstract

Mannose-binding lectin (MBL) encoded by MBL2 gene is a protein with the ability to form carbohydrate complexes with microbial wall promoting their subsequent elimination. Genetically determined levels of MBL can modify the risk and clinical characteristics of many infectious diseases. The frequency of MBL2 genotypes exhibits significant population differences. The data on the distribution of MBL2 genotypes among the aborigines of the Russian Arctic territories have not yet been published. A total of 880 specimens of dried blood spots of the newborns were genotyped. The newborns represented four populations: Nenets, Dolgan-Nganasans, Mixed aboriginal population, and Russians (Caucasians, Krasnoyarsk). Six polymorphisms of the MBL2 gene were studied: rs11003125, rs7096206, rs7095891, rs5030737, rs1800450, and rs1800451. The frequency of the combined rare O allele (composed of the coding region variants rs5030737, rs1800450, and rs1800451) in the homozygous state was significantly higher in Russians: 10% vs 2% in Nenets and 1% in Dolgan-Nganosans (p < 0.001 for Russians vs other populations). The frequency of the high-producing haplotype (HYPA) was 35.4% in the Russian newborns, in keeping with European populations (27–33%); 64% for Nenets and 56% for Dolgan-Nganasans, similar to the estimates obtained for Eskimos and North Amerinds (64–81%). Our study results are in line with the hypothesis that human evolution has been moving in the direction of accumulation of the genotypes associated with low activity of the lectin complement activation pathway because of the prevalence of some intracellular infections such as tuberculosis, whereby low MBL activity may have a protective effect.

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Data availability

Available at https://datadryad.org/stash/dataset/doi:10.5061/dryad.15dv41nvd, https://datadryad.org/stash/share/eAgaS5gub5TdmsSDJP8YKFXIzuoVR9NXw6cxeVxr0FE

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Funding

This study was carried out under the state assignment (theme # 003) for Scientific Research Institute of Medical Problems of the North, Krasnoyarsk, Russia.

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Contributions

ST designed and coordinated the study. MS performed the genotyping. ST, MS, and MF performed the data analysis and drafted the manuscript. All authors commented on the manuscript and agreed on the final version to be published.

Corresponding author

Correspondence to Sergey Yu Tereshchenko.

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Conflict of interest

The authors declare that they have no conflict of interest.

Ethics approval

The study was approved by the Ethical Committee of the Scientific Research Institute of Medical Problems of the North (# 9 of 8.09.2014).

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Signed informed consent was obtained from parents of all participated children.

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Signed informed consent was obtained from parents of all participated children.

Code availability

Available at https://datadryad.org/stash/dataset/doi:10.5061/dryad.15dv41nvd, https://datadryad.org/stash/share/eAgaS5gub5TdmsSDJP8YKFXIzuoVR9NXw6cxeVxr0FE

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Tereshchenko, S.Y., Smolnikova, M.V. & Freidin, M.B. Mannose-binding lectin gene polymorphisms in the East Siberia and Russian Arctic populations. Immunogenetics 72, 347–354 (2020). https://doi.org/10.1007/s00251-020-01175-5

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  • DOI: https://doi.org/10.1007/s00251-020-01175-5

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