Research output: Contribution to journal › Article › peer-review
Marital Structure, Genetic Fitness, and the GJB2 Gene Mutations among Deaf People in Yakutia (Eastern Siberia, Russia). / Romanov, G. P.; Barashkov, N. A.; Teryutin, F. M. et al.
In: Russian Journal of Genetics, Vol. 54, No. 5, 01.05.2018, p. 554-561.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Marital Structure, Genetic Fitness, and the GJB2 Gene Mutations among Deaf People in Yakutia (Eastern Siberia, Russia)
AU - Romanov, G. P.
AU - Barashkov, N. A.
AU - Teryutin, F. M.
AU - Lashin, S. A.
AU - Solovyev, A. V.
AU - Pshennikova, V. G.
AU - Bondar, A. A.
AU - Morozov, I. V.
AU - Sazonov, N. N.
AU - Tomsky, M. I.
AU - Dzhemileva, L. U.
AU - Khusnutdinova, E. K.
AU - Posukh, O. L.
AU - Fedorova, S. A.
N1 - Publisher Copyright: © 2018, Pleiades Publishing, Inc.
PY - 2018/5/1
Y1 - 2018/5/1
N2 - Autosomal recessive deafness type 1A (DFNB1A) caused by mutations in the GJB2 gene (Cx26) is the main cause of nonsyndromic hearing impairment in many populations worldwide. It is considered that widespread prevalence of DFNB1A can be due to the long tradition of intermarriages between deaf people (assortative marriages) combined with their increased social adaptation and genetic fitness after widespread introduction of sign language. For the first time, the data on mating structure and reproduction of deaf people living in Yakutia (Eastern Siberia, Russia) are presented in comparison with contribution of the GJB2 gene mutations to the etiology of hearing impairment. The relative fertility of deaf people compared to their hearing siblings is 0.78 (mean number of children 1.76 ± 0.10 and 2.24 ± 0.09 to deaf and their hearing siblings, respectively, p = 0.0018). The rate of assortative marriages among deaf people is 77.1% (81 of 105 marriages). Biallelic mutations in the GJB2 gene were found in 42.2% (43 of 102) of examined deaf people, which corresponded to diagnosis DFNB1A for these patients. A comparison of deaf marital partners by GJB2 status revealed a proportion of noncomplementary marriages (24%) in which hearing loss in both partners was caused by the presence of biallelic GJB2 gene mutations resulting in the birth of only deaf children in such couples. Thus, the set of obtained data including a relatively high genetic fitness (expressed as relative fertility) of deaf people in Yakutia in combination with a high rate of assortative marriages among them and high incidence of DFNB1A indicates a possible weakening of selection against such trait as “deafness” and a possible increase in the frequency of GJB2 mutant alleles in subsequent generations.
AB - Autosomal recessive deafness type 1A (DFNB1A) caused by mutations in the GJB2 gene (Cx26) is the main cause of nonsyndromic hearing impairment in many populations worldwide. It is considered that widespread prevalence of DFNB1A can be due to the long tradition of intermarriages between deaf people (assortative marriages) combined with their increased social adaptation and genetic fitness after widespread introduction of sign language. For the first time, the data on mating structure and reproduction of deaf people living in Yakutia (Eastern Siberia, Russia) are presented in comparison with contribution of the GJB2 gene mutations to the etiology of hearing impairment. The relative fertility of deaf people compared to their hearing siblings is 0.78 (mean number of children 1.76 ± 0.10 and 2.24 ± 0.09 to deaf and their hearing siblings, respectively, p = 0.0018). The rate of assortative marriages among deaf people is 77.1% (81 of 105 marriages). Biallelic mutations in the GJB2 gene were found in 42.2% (43 of 102) of examined deaf people, which corresponded to diagnosis DFNB1A for these patients. A comparison of deaf marital partners by GJB2 status revealed a proportion of noncomplementary marriages (24%) in which hearing loss in both partners was caused by the presence of biallelic GJB2 gene mutations resulting in the birth of only deaf children in such couples. Thus, the set of obtained data including a relatively high genetic fitness (expressed as relative fertility) of deaf people in Yakutia in combination with a high rate of assortative marriages among them and high incidence of DFNB1A indicates a possible weakening of selection against such trait as “deafness” and a possible increase in the frequency of GJB2 mutant alleles in subsequent generations.
KW - assortative marriages
KW - deafness
KW - GJB2 gene
KW - relative fertility
KW - Yakutia
UR - http://www.scopus.com/inward/record.url?scp=85047237520&partnerID=8YFLogxK
U2 - 10.1134/S1022795418050071
DO - 10.1134/S1022795418050071
M3 - Article
AN - SCOPUS:85047237520
VL - 54
SP - 554
EP - 561
JO - Russian Journal of Genetics
JF - Russian Journal of Genetics
SN - 1022-7954
IS - 5
ER -
ID: 13487297