Search

The results of the study of genetic load and diversity of monogenic forms of hereditary pathology (MHP) among the child population from 11 districts of Kirov region (KR) obtained during genetic and epidemiological study of the region are presented. The total size of surveyed population is 286 616 individuals (including 37 348 children—13.03%), mainly Russians (88.1%). MHP included 91 diseases (287 patients from 255 families): 50 with autosomal dominant (AD) inheritance (153 patients from 129 families), 33 with autosomal recessive (AR) (107 patients from 104 families), and 8 nosologies with X-linked inheritance (27 patients from 22 families). All diseases were found in previously surveyed populations of the Russian Federation. Nine forms of MHP were detected with a prevalence higher than 1 : 5000: hereditary motor-sensory neuropathy (21.42/100 000), AD ichthyosis vulgaris (83.00/100 000), AD congenital ptosis (24.10/100 000), AD congenital cataract (29.45/100 000), AD syndactyly, type 1 (24.10/100 000), AR undifferentiated mental retardation (26.76/100 000), AR microcephaly with mental retardation (50.87/100 000), AR congenital cataract (26.78/100 000), and AR nonsyndromic sensorineural hearing loss (58.91/100 000). The average prevalence of MHP among the child population of KR was 1 : 130 children, with variation from 1 : 236 children in Vyatskopolyansky district to 1 : 51 children in Sunsky district. On the basis of the correlation analysis between load estimations and Fst values carried out, the reasons for revealed differentiation between districts are assumed.

The results of genetic and epidemiological study of monogenic hereditary diseases (HD) among children of the Karachay-Cherkess Republics are presented. The surveyed population comprised 410 368 individuals (Cherkessk and ten rural areas), including 90 739 children (22.11%). The examination was performed following the original protocol for genetic-epidemiological studies (developed by the Research Centre for Medical Genetics) making it possible to register not less than 3500 HD and syndromes. One hundred eighty-three nosological forms of HD (922 patients from 764 families) were registered in the child population, including 100 patients with AD (459 patients from 366 families), 60 patients with AR (372 patients from 326 families), and 23 patients with X-linked inheritance (91 patients from 72 families). The structure of diversity is determined, and frequent HDs are described in accordance with the main classification by organ and systemic types of disease: neurological, ophthalmic, genodermatoses, skeletal, hereditary syndromes, and other pathology. There were 55 frequent HDs (30.05%)—the number of patients in this group was 739 (80.15% of sick children). The load of AD, AR, and X-linked pathology for urban and rural child population was calculated. Differences in HD load were identified. On the basis of correlations between the load and FST, the causes of the observed differentiation of subpopulations were proposed.