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329 results on '"Churnosov M"'

25. LOXL1 gene polymorphism candidates for exfoliation glaucoma are also associated with a risk for primary open-angle glaucoma in a Caucasian population from central Russia

Author

Eliseeva, N., Ponomarenko, I., Evgeny Reshetnikov, Dvornyk, V., and Churnosov, M.

Subjects
eye diseases, Research Article
Abstract

Purpose This study was aimed to replicate the previously reported associations of the three LOXL1 gene polymorphisms with exfoliation glaucoma (XFG) and to analyze these genetic variants for their possible contribution to primary open-angle glaucoma (POAG) in Caucasians from central Russia. Methods In total, 932 participants were recruited for the study, including 328 patients with XFG, 208 patients with POAG, and 396 controls. The participants were of Russian ethnicity (self-reported) and born in Central Russia. They were genotyped at three single nucleotide polymorphisms (SNPs) of the LOXL1 gene (rs2165241, rs4886776, and rs893818). The association was analyzed using logistic regression. Results Allele C of rs2165241 was associated with a decreased risk of XFG (odds ratio [OR] =0.27–0.45, pperm ≤5*10−6) and POAG (OR=0.35–0.47, рperm≤0.001), and allele A of rs4886776 and rs893818 were associated with a lower risk of XFG (OR=0.53–0.57, рperm≤0.001). Haplotype TGG of loci rs2165241-rs4886776-rs893818 was associated with an elevated risk of XFG (OR=2.23, рperm=0.001) and POAG (OR=2.01, рperm=0.001), haplotype CGG was also associated with a decreased risk of XFG (OR=0.45, рperm=0.001) and POAG (OR=0.35, рperm=0.001). Haplotype CAA was associated with a decreased risk of XFG only (OR=0.50, рperm=0.001). Conclusions Polymorphisms rs2165241, rs4886776, and rs893818 of the LOXL1 gene showed association with XFG and POAG in a Caucasian sample from central Russia.

Published
2021

47. Characterizing the genetic history of admixture across inner Eurasia

Author

Jeong, C., Balanovsky, O., Lukianova, E., Kahbatkyzy, N., Flegontov, P., Zaporozhchenko, V., Immel, A., Wang, C., Ixan, O., Khussainova, E., Bekmanov, B., Zaibert, V., Lavryashina, M., Pocheshkhova, E., Yusupov, Y., Agdzhoyan, A., Sergey, K., Bukin, A., Nymadawa, P., Churnosov, M., Skhalyakho, R., Daragan, D., Bogunov, Y., Bogunova, A., Shtrunov, A., Dubova, N., Zhabagin, M., Yepiskoposyan, L., Churakov, V., Pislegin, N., Damba, L., Saroyants, L., Dibirova, K., Artamentova, L., Utevska, O., Idrisov, E., Kamenshchikova, E., Evseeva, I., Metspalu, M., Robbeets, M., Djansugurova, L., Balanovska, E., Schiffels, S., Haak, W., Reich, D., and Krause, J.

Abstract

The indigenous populations of inner Eurasia, a huge geographic region covering the central Eurasian steppe and the northern Eurasian taiga and tundra, harbor tremendous diversity in their genes, cultures and languages. In this study, we report novel genome-wide data for 763 individuals from Armenia, Georgia, Kazakhstan, Moldova, Mongolia, Russia, Tajikistan, Ukraine, and Uzbekistan. We furthermore report genome-wide data of two Eneolithic individuals (~5,400 years before present) associated with the Botai culture in northern Kazakhstan. We find that inner Eurasian populations are structured into three distinct admixture clines stretching between various western and eastern Eurasian ancestries. This genetic separation is well mirrored by geography. The ancient Botai genomes suggest yet another layer of admixture in inner Eurasia that involves Mesolithic hunter-gatherers in Europe, the Upper Paleolithic southern Siberians and East Asians. Admixture modeling of ancient and modern populations suggests an overwriting of this ancient structure in the Altai-Sayan region by migrations of western steppe herders, but partial retaining of this ancient North Eurasian-related cline further to the North. Finally, the genetic structure of Caucasus populations highlights a role of the Caucasus Mountains as a barrier to gene flow and suggests a post-Neolithic gene flow into North Caucasus populations from the steppe.

Published
2018

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