Maintaining bone health involves a complex balance of factors, including the intake and absorption of minerals such as calcium and phosphorus. These processes are influenced by the presence of vitamin D and its receptor (VDR). The VDR gene is essential for regulating these processes, and variations in the gene can impact bone density and susceptibility to diseases.

To date, it has been established that the patient's genotype plays a significant role in the formation of trehalase enzymopathy: the level of enzyme activity decreases when the G→A allele replacement occurs in the rs2276064 locus of the TREH gene. To assess the prevalence of trehalase deficiency, extensive population-based studies are needed. Clinical observations show that the reduced activity of bowel trehalase is more common in the Arctic than in European populations. The aim of this research was to analyze the frequency of the alleles and variants of trehalase gene (rs2276064 TREH) in the indigenous small-numbered populations of Siberia and the Russian Far East. Material and methods. Using the Infinium iSelect HD Custom BeadChip biochip on the iScan platform and real-time polymerase chain reaction on a Bio-Rad CFX96 Touch amplifier, genotyping of 1068 DNA samples was carried out, of which 711 represent 10 ethnic groups of the indigenous people of the North of Siberia and the Far East of the Russian Federation. Two reference groups of Russians (n=311) and Yakuts (n=46) represented the "Caucasoid" and "Mongoloid" poles of the Russian population. Results. The reduced trehalase activity that the heterozygous GA*TREH genotype determines can manifest itself in 19.8-53.7% of indigenous northerners. An additional 1.0 to 19.7% of the population are carriers of the AA*TREH genotype, which is associated with apparent trehalose malabsorption. The carriers may experience nausea, abdominal pain, and other dyspeptic symptoms after eating trehalose containing foods. The total risk of trehalase enzymopathy among the indigenous northerners in the Asian part of the Russian Federation is very high and can reach 60-70%. There is a gradient in the A*TREH allele frequencies in the small-numbered indigenous northern groups of Russia from the west (Khanty, Mansi, Nenets) to the east (peoples of the Far East). Conclusion. The results are consistent with previously reported data on the higher carriage of the A*TREH mutant allele in Mongoloid populations compared to Caucasoid groups. It was hypothesized that, while the initial A*TREH allele prevalence in Mongoloid groups was moderately high, an adaptation to a low-sugar protein-lipid "high-latitude" diet led to a weaker control over the maintenance of the carriage of the ancestral G allele. Trehalose malabsorption requires special attention of specialists in the field of nutrition, gastroenterology, public health, and medical genetics working in high-latitude regions.

The study of the genetic determinants of the disaccharidase activity opens up new prospects for improving diagnostics and choosing medical tactics in gastroenterology. The aim of the study was to systematize the data on the role of the sucrase-isomaltase gene (SI) in regulating sucrose metabolism and the contribution of SI mutations to the prevalence of sucrose malabsorption disorders (sucrase-isomaltase deficiency, SID) and certain forms of enterological pathology in different population groups. Material and methods. A review of the peer-reviewed scientific literature, mainly in the PubMed database (https://pubmed.ncbi.nlm.nih.gov) and eLibrary (https://elibrary.ru), was conducted using key words: carbohydrate malabsorption, sucrase, sucrase-isomaltase deficiency, sucrase-isomaltase SI gene. The search depth was not specified, but particular attention was paid to recent publications. The gnomAD database (https://www.ncbi.nlm. nih.gov/snp/rs781470490) was also used. Results. According to the review results, 37 out of 150 known SI gene mutations have been confirmed to contribute to reduced sucrase activity or restricted sucrase production. The prevalence of point mutations in the SI gene is estimated at 0.0006%, but carrier rates of the SI delAG deletion (rs781470490), manifested as homozygosity in SID, are very high (5-21%) in indigenous populations of Arctic regions in East Asia and America. Medicalgenetic research methods improve the accuracy of differential diagnosis of primary and secondary SID and other forms of disaccharide and polysaccharide malabsorption. The formation of databases on the prevalence of genetic determinants of sucrase-isomaltase insufficiency is a promising way to refine the epidemiology of SID. There is an increased (0.2-2.3%) risk of clinical manifestations of SID in homozygous carriers of the SI delAG mutation in the Chukotka, Kamchatka, and Northern Priochotye populations. Verification of reports on a less pronounced tendency to lipid metabolism disorders in SI delAG carriers compared with the control group is recommended. Conclusion. Manifestations of mutant SI variants in the phenotype are associated with the presence of accompanying carbohydrate malabsorption variants and specific gut microbiota. The SI 15Phe variant (rs9290264) may contribute to the development of irritable bowel syndrome.

"Thrifty genotypes" are the risk factors for obesity and lipid and energy metabolism disorders. Hence, it is important to assess the contribution of environmental factors that influenced the thrifty genotypes' population distribution. Aim of the study - systematization and critical analysis of published data on population variability, relationship with climatic and environmental characteristics, association with traditional types of lifestyles, and nutrition for the «thrifty genotypes» of APOE, UCP1, UCP3, and FTO genes. Material and methods. The selection of publications from the last 20-25 years presented in the PubMed database (https://pubmed.ncbi.nlm.nih.gov) was carried out by the keywords of the generalizing rank (thrifty genotype, thrifty phenotype, drifty genotype), then narrowed down to the APOE, UCP, FTO. The final set includes publications that consider the association of genotypes with the ecological conditions of the population. Results. Our analysis of publications has confirmed the ethnic and geographical variability in the allele distribution of APOE, UCP1, UCP3, and FTO genes. However, the nature of this variability hasn't been studied sufficiently; the contribution of individual factors of the natural and anthropogenic environment remains unclear. The information on the geographical distribution of the APOE gene alleles is quite complete, while the data on the «thrifty genotypes» of UCP and FTO require further study. Conclusion. The frequency of the UCP1 and UCP3 alleles associated with effective non-contractile thermogenesis is increased in populations adapted to low temperatures. However, the population-geographical pattern of the UCP thrifty genotypes' variability as a determinant of increased fat deposition has been studied insufficiently. The carriage of FTO mutant variants increases the adaptability of groups with a traditional lifestyle and diet but is maladaptive in an urbanized environment. The influence of natural and ecological conditions on the formation of the FTO allele geographical distribution requires more attention. The results obtained allow us to propose the included groups' ranking according to the past environmental management and nutrition will facilitate the search for ecological factors that influenced the geographical distribution of genotypes (and, accordingly, populations with different levels of risk of metabolic disorders).

In order to be digested, the disaccharide trehalose needs to be cleaved by the trehalase enzyme. There were reports suggesting that trehalase deficiency was more common in high-latitude than in the temperate climate populations. New horizons were opened for the epidemiologic research of trehalase enzymopathy when it became clear that reduced trehalase activity is determined by the A allele of tTREH gene (rs2276064). The aim of this study was to analyze the frequencies of the trehalase gene alleles and genotypes among the indigenous peoples of Siberia and the Russian Far East. We genotyped 567 samples representing the indigenous peoples of Siberia and the Russian Far East and 146 samples representing Eastern Slavs as the reference dataset. We found that the frequencies of the A*TREH alleles increased to the east. The A*TREH allele frequency was 0.03 in the reference group, 0.13-0.26 in the North-West Siberian indigenous populations, 0.29-0.30 in the South Siberia, 0.43 in West Siberia, and 0.46 in the low Amur populations. The highest frequency of the A allele (0.63) was observed in the Chukchi and Koryak populations. From 1 to 5% of European origin individuals are at risk of trehalase enzymopathy. In the indigenous populations, the frequency of the A*TREH allele varies 13% to 63%, whereas the frequency of the AA*TREH genotype from 3% to 39%. Thus, the total risk of trehalase enzymopathy among the homo- and heterozygous carriers of the A*TREH allele in the studied indigenous populations may be as high as 24% to 86%.

This article problematizes the organization of higher education for indigenous minorities, considering alternative strategies, namely segregation and inclusion, at the theoretical and empirical levels. Based on the analysis of publications by Russian and foreign researchers, representatives of indigenous peoples are presented as one of the categories, along with students from remote regions and from families with low socioeconomic status, whose opportunities for higher education are limited by a number of economic and social factors. The empirical study focuses on a group of Komi-Permyak (one of the indigenous ethnic groups of the Russian North) students studying in a large industrial city, Perm. The Department of Komi-Permyak Language and Literature of the Faculty of Philology at the Perm State University of Humanities and Pedagogy (PSUHP) provides professional training for teachers majoring in “Native (Komi-Permyak) Language and Literature and the Russian Language”. In addition to pedagogical disciplines, the curriculum includes a wide range of disciplines related to the linguistic aspects of the Komi-Permyak language, literature and regional studies. In the course of the interdisciplinary study, indicators of cortisol and anxiety levels -markers of stress response - were obtained. Their comparison with the same indicators of Russian students of other faculties of the same university (N=268) allowed us to conclude that Komi-Permyak students are adapted to the learn- © Козлова М.А., Козлов А.И., Корниенко Д.С., 2022 ing conditions. This fact distinguishes this group from students from other ethnic minorities of the Arctic and subarctic regions who study at other universities. The data provided by the department's administration on the composition of students indicate a low dropout rate of Komi-Permyaks, which indicates that the main factor of educational inequality in relation to this category of students has been overcome. The second stage of the study, carried out in a qualitative methodology (semi-structured interviews, N=9), analyzed aspects of the biographical situation, including migration experience, features of the organization of the educational process and individual strategies of education-al/career formation and building social ties within and outside the ethno-cultural community. Based on the barriers identified in the narratives of the informants and new opportunities for integration into a new sociocultural environment, the key factors of successful adaptation of indigenous students to learning conditions are reconstructed. On the basis of the obtained data, a conclusion is made about the adaptive and integrative potential of soft strategies of educational inclusion, which involve the creation of conditions that allow an individual to independently vary the degree of cultural closeness-openness and social inclusion-exclusion.

The changes in the prevalence of overweight and obesity in countries with different levels of economic development are contra-directional. Information on the matter in the regions of the Russian Federation is incomplete, making monitoring difficult. The weight status of the child and youth population is of particular interest. The study aimed to assess the prevalence of overweight and obesity in school-age children living in rural settlements, a small town, and a city of Perm Krai. Materials and methods. The data on schoolchildren aged 7–18 (1688 males and 1754 females) was collected in Perm city, Kudymkar town, and rural settlements of Perm Krai in 2019–20. The body weight (BW) status was determined according to the procedure recommended by the Ministry of Health of the Russian Federation (2017). Results. Excess BW was found in 23.6-26.3% of the rural and urban children (including obesity in 8.3–10.2%). The rural-urban differences within gender subgroups were statistically non-significant (p> 0.05). Males were more likely than females to be overweight (p < 0.05) and obese (p = 0.057 in rural, p< 0.02 in urban subgroups). The mode of the excess BW distribution in both gender subgroups falls at 11 years of age. Conclusion. According to our data, the prevalence of excess BW and obesity in the schoolchildren of Perm Krai in 2019-2020 turned to be high and close to that in the Komi Republic, Udmurtia, Bashkiria, and Moscow; independent from the type of residency (city, town, or rural settlement); dependent from the sex factor. As far as the sex differences in the prevalence of excess BW and obesity were found significant, and the sex ratio varies in populations, the comparison should be done in male and female groups separately, or take into account the sex ratio.

Introduction. The diet of indigenous northerners is changing significantly on account of the rapid growth in volume and variety of consummated food sugars. Concurrently, an arrow of northern aboriginal groups are known to have an increased percentage of genetically determined disorders of disaccharide metabolism. The study aimed to assess the polymorphism of genes and alleles that determine production or activity of sucrase-isomaltase, trehalase and lactase enzymes in the groups of Nenets of Western Siberia and European Arctic. Materials and methods. The genotyping of the samples of biomaterial from 236 unrelated individuals formed the basis of the study. We analyzed the genotype and allele frequencies of the SI (rs781470490), TREH (rs2276064) and LCT (rs4988235) genes in the groups of Forest, Gydan, Yamal and European Tundra Nenets. Results. There were not a single sample with the AG dinucleotide deletion at the rs781470490 locus of the sucrase-isomaltase gene (SI gene) found. The TREH allele distributions appeared to be extremely close in all the sub-ethnic groups of Nenets. The frequency of the associated with trehalase deficiency A*TREH allele in the Nenets groups is at 0.25-0.26, which is significantly higher than in the non-arctic populations of Russia (0.01-0.06). We have confirmed a high prevalence in the Nenets populations of the CC*LCT variant of the lactase gene, which determines the limited production of the enzyme. The frequencies of the genotype vary in the Nenets sub-groups from 0.90 in the Gydan and European Tundra Nenets to 0.70 in the Forest (the difference from the European Tundra group is significant at the level of p = 0.06) and 0.65 in the Yamal Nenets (significantly differ from both the Gydan and European Tundra groups, p < 0.05). Conclusion. The difference in metabolism-related gene complexes can be found not only between peoples, but even between sub-ethnic groups.

The object of the study is the indigenous population of the North and the Arctic of the Russian Federation. The subject of the study is changes in nutrition during transition from the traditional to modernized lifestyle. The purpose of the study is to consider the risk to the health of the northerners in the quantitative and qualitative changes in the consumption of flour and starch-containing products. The consumption of bread products and starch by the population of the northern regions of the Russian Federation in the 19th – 20th centuries and in the 2010s – 2020s was estimated. Estimates of the frequencies of the amylase genes AMY1, AMY2B, AMY2A in the populations that differ in geographic localization and type of management are systemized. In the 20th century, per-capita consumption of bread in Russia decreased from 700 to 260 g/day, among the indeginous northerners — from 300 to 250 g/day. The inclusion of pasta products and potato in the diet of the northerners changed the volume and structure of the consumed carbohydrate foods. The intake of high glycemic load starch increased from 100 to 250 g/day. Replacing the dried crusts with pasta and potato meals eased mastication of food, thus inducing a reflectory rise in serum glucose at ingestion and increasing the risk of developing chronic carbohydrate metabolism disorders. High-latitude populations are distinct in the prevalence of the genotypes that determine low activity of the polysaccharidase enzymes necessary for starch digestion. The ample production of amylase and less prominent blood glucose upswing in response to the consumption of starchy foods are determined by the number of successive copies of the amylase genes on the AMY locus. For the AMY1 gene, a negative correlation was found between the gene copy number and the geographical latitude of the population area (rSp = -0.19), for the AMY2A gene rSp = -0.33 (p < 0.001 in both cases). In addition, in the Arctic groups there is a high frequency of deletions of the AMY2A gene, which also lead to insufficient synthesis of pancreatic amylase. In the European populations, AMY2A deletions occur in 10–11 %; among the Khanty, Mansi, and Selkups — in 28 %; among the indigenous population of Chukotka — in 52 %. Changes in the “Arctic diet” in the 20th century led to a sharp increase in the starch consumption. With the traditional way of life, the northerners did not form adaptations to the nutrient intake of large volumes of starchy foods. In modern conditions, accumulation of nutritional, physiological and genetic factors increases the risk of metabolic disorders related to the consumption of high-starch food.

BACKGROUND: There was not enough information on the spread of obesity among schoolchildren in rural settlements and small towns of Northern Russia in recent years. This study aimed to trace the prevalence of overweight and obesity in children aged 617 years living in rural areas of Northern Russia between 1994 and 2019. METHODS: Data, including sex, age, body weight, and stature, were collected during regular medical examinations of 7548 children aged 617 years living in the rural settlements of Murmansk Oblast, Khanty-Mansi Autonomous Okrug, Komi Republic, Komi-Permyak Okrug in 1994, 19971998, 20052009, and 20162019. Individual assessments were made using body mass indices according to the procedures and cutoffs recommended by the World Health Organization. RESULTS: The prevalence of excess body weight has substantially increased in all localities. It was 47% (including 0.6%0.8% obesity) in 19941998, 7.518.7% (obesity 0.95.0%) in 20052009, and 23.926.6% (obesity 7.711.9%) in 20162019. As 2019 data showed, no difference was found between schoolchildren residing in rural settlements, small towns, large industrial centers, and Moscow. CONCLUSION: A rapid spread of overweight and obesity among Russian children occurred in the second decade of the 21st century. The northern populations encounter this process in the same degree and extent as others. Geographic (Arctic, non-Arctic North, and Central Russia) and socioeconomic (various levels of urbanization) factors do not play a major role in that negative dynamics.

The aim of this work was to compare the prevalence of opisthorchiasis, diphyllobothriasis, and ascariasis among the rural indigenous and long-term resident people of Khanty-Mansi Autonomous Okrug (KMAO) in the years 1988–89 and 2018–19. Helminth infections were identified by faecal microscopic examinations conducted during health check-ups. We analysed 399 medical records for years 1988–89 and 549 records for 2018–19. There were found a decrease in the prevalence of ascariasis among the indigenous people, but the region remains a hotbed of fish-transmitted helminthiases. The spread of D. latus infestation has remained close to 5% in the indigenous adults. The number of opisthorchiasis-infected children, both indigenous and non-indigenous, has increased significantly (p < 0.05). Among the indigenous adults, opisthorchiasis in 2018–19 was at as high level as in 1988–89 (57.5% vs 54.4%). The non-indigenous adults had O. felineus infestations in 2018–19 frequently than in 1988–89 (p = 0.06). The results of our study on the prevalence of helminth infection in the population of the northern Ob River basin agree with the many years average annual incidence of helminthiases in KMAO.

Due to the low specificity and sensitivity of non-invasive clinical tests trehalose malabsorption remained out of sight of gastroenterologists. Therefore, the specialists regard this disorder as rare. Trehalose became widely used in the food industry as a harmless sucrose substitute, sweetener and stabilizer. After the discovery of the trehalase gene (rs2276064 TREH), it was found that the A*TREH allele is the determinant of the disaccharide absorption disorders, and the allele's carriership may be high in some groups. There is not enough information on the A*TREH frequency in the population of Russia. The aim of the study was to analyze the allele and genotype frequencies of the trehalase gene (rs2276064 TREH) in the main population groups of the Russian Federation and neighboring countries. Methods. DNA samples from 1146 unrelated subjects belonging to 21 population groups of Russia, Azerbaijan, Tajikistan and Mongolia were genotyped by the two following methods: 1) using the Infinium iSelect HD Custom Genotyping BeadChip (Illumina, USA) on the iScan platform; 2) by the real time polymer-chain reaction (PCR) method on the Bio-Rad CFX96 Touch amplifier. Results. It has been found that on the territory of the Russian Federation the frequency of the A*TREH allele increases from the west to the east. The frequencies are lowest in the groups of Russians and Finns of the Northwest (0.01-0.03), up to 0.07 in the populations of Central Russia and the Volga region, and even higher toward the Southern Urals (Bashkirs 0.15), in the Transurals and Southern Siberia (0.19 in the Altai people, 0.30 in the Tuvinians and Mongols). Up to 1% of the population of the European part of the Russian Federation have the AA*TREH genotype (i.e. trehalose intolerance in phenotype), and up to 15% (GA*TREH genotype) have a reduced ability to absorb the disaccharide. In the Asian part of the country (Siberia, Altai, Baikal) the genotypes carriers constitute up to 12 and 46% respectively. Conclusion. Trehalose malabsorbtion is an underappreciated problem of particular practical importance for regions with high concentrations of indigenous population (Yakutia-Sakha, Buryatia, Tyva, etc.). It would be feasible to consider food labelling of trehalose.

The subject of the study is autochthonous population of the Northern and Middle Cis-Urals: Komi-Permyaks, Komi (Zyryans), and Komi-Izhems. The aim of the study is to compare the population frequencies of the LCT (rs4988235) and VDR (FokI rs2228570 and BsmI rs1544410) genes and to consider the contribution of environ-mental and cultural factors to the formation of differences in the genetic determinants of bone tissue metabolism. In total, 181 Komi-Permyak, 223 Komi, and 200 Komi-Izhem subjects were tested clinically and genetically. The evaluation consisted of the determination of polymorphic loci of VDR and LCT genes variants and assessment of clinical and laboratory lactase activity. The information on traditional diet and food composition was obtained from ethnographic materials. The study group of Komi-Izhems differs by a high proportion of C*LCT carriers (0.85) from the other two groups (p < 0.05). The prevalence of hypolactasia, i.e., limited lactase production, is also higher (p < 0.05) in Komi-Izhems (0.64) than in Komi-Permyaks (0.47) and Zyryans (0.41). The T*BsmI allele frequency is higher in Komi-Izems (0.493) in hetero- CT* (0.463) and homozygote TT* (0.261) genotypes, as compared to Zyryans (p < 0.05, where the frequencies are 0.377, 0.329 and 0.212, respectively). The values of BsmI allele and genotype frequencies in Komi-Permyaks are intermediate and do not differ significantly from those in Komi-Izhems and Zyryans. The concentration of T*FokI is highest in Komi-Permyaks (0.528). They are followed by Zyryans (the difference is insignificant, p > 0.05). Komi-Izhems have the smallest proportion of T*FokI allele carriers (0.400) and significantly differ from Komi-Permyaks (p = 0.01). The genotype distributions in FokI locus of VDR in the groups of Komi-Permyaks and Zyryans do not differ, but both show higher CT*FokI genotype frequencies than Komi-Izhems (0.549 and 0.569 against 0.288; p < 0.001). Poor livestock production and a lack of milk in the traditional subsistence economy of the Komi-Permyaks weakened the selection in favor of T*LCT allele and lactase persistence. The low intake of calcium with milk was compensated by an increase in the sensitivity of the target organs to calciferol, the regulator of mineral metabolism, by maintaining the high frequency of carriers of T*BsmI and T*FokI alleles of VDR gene in the population. The more productive dairy farming of Zyryans stimulated selection in favor of lactase persistence. The possibility of continuous consumption of calcium from milk eased the selection pressure on VDR loci. The regulation by T*FokI produced a physiologically sufficient effect and T*BsmI carriership remained low. The diet of the Komi-Izhems, who were accustomed to high-latitude regions, comprised low-lactose dairy products. The population preserved a high carriage of C*LCT and the phenotype of hypolactasia. Moderately intensive selection for vitamin D receptor sensitivity showed up in the increase of VDR T*BsmI frequency only. The high D-vitamin status of the Izhem people was leveraged by the traditional diet with a considerable intake of ergocalciferol-rich venison and fish. The Komi-Permyaks, Komi (Zyryans) and Komi-Izhems occupied different ecological niches and the groups found different ways to adapt to the unfavorable bone-homeorhesis conditions. The flexible responses to the pressure of the environmental factors were imple-mented by the selection of variants of LCT, VDR FokI and VDR BsmI genes, which are located in different chro-mosomes and determine different stages of mineral metabolism. We contend that modern interpopulation differences in distribution of the genotypes and alleles are the manifestations of different strategies of ecological adaptation of anthropologically related groups.

The study populations have been grouped into two clusters. The first constituted the ethnic groups that are anthropologically affine but differ in adaptive types and husbandry practices. The second included the anthropologically unrelated ethnic groups having similar environment economy systems and adaptive types. We analyzed the genotype and allele frequencies of the metabolism-associated APOE, LCT, TREH, UCP1 genes, and Fok1 and BsmI polymorphisms of VDR gene. A total of 749 samples in the study represents the ethnic groups of Komi-Permyaks (n=181), Komi (n=235), Komi-Izhems (n=200), Shores (n=133). Results. A resemblance in the morphological and physiological complexes that have convergently developed in the course of environmental adaptations have been shown to reflect similarities in the gene features of anthropologically unrelated populations. In contrast, in the historically related groups that have utilized different biotopes and types of husbandry, there are growing divergence in the frequencies of metabolism-associated genotypes and alleles. These findings imply that ecological adaptations of modern human populations drive the minor changes in allele frequencies, which have occurred over a few generations. Conclusion. The apparent morpho-physiological and population-genetic specificity of the adaptive types allows us to regard the process of their formation as microevolution.

Õîòÿ ñåãîäíÿ ìàññà òåëà ìëàäåíöåâ ÷àñòî èñïîëüçóåòñÿ äåìîãðàôàìè è ñïåöèàëèñòàìè â îáëàñòè ñîöèàëüíîé (ïîïóëÿöèîííîé) ìåäèöèíû â êà÷åñòâå èíòåãðàëüíîãî ïîêàçàòåëÿ áëàãîïîëó÷èÿ òîé èëè èíîé ãðóïïû, ðÿä âîïðîñîâ òåîðåòè÷åñêîãî ïëàíà âñ¸ åù¸ òðåáóåò óãëóáë¸ííîãî

ДИВЕРГЕНЦИЯ ГЕНЕТИЧЕСКИХ КОМПЛЕКСОВ У АНТРОПОЛОГИЧЕСКИ РОДСТВЕННЫХ ПОПУЛЯЦИЙ ПРИ РАЗНЫХ ТИПАХ ХОЗЯЙСТВОВАНИЯ Öåëü -ïðîâåñòè îöåíêó ïîëèìîðôèçìà ãåíîâ àäàïòàöèè â àíòðîïîëîãè÷åñêè ðîäñòâåííûõ ïîïóëÿöèÿõ êîìè-ïåðìÿêîâ è çûðÿí (êîìè-èaeåìöåâ), îñâîèâøèõ ðàçíûå âàðèàíòû õîçÿéñòâîâàíèÿ.Ìàòåðèàëû è ìåòîäû. àíàëèç âêëþ÷åíû îáðàçöû ÄÍÊ 127 êîìè-ïåðìÿêîâ è 134 êîìè-èaeåìöåâ.Ïðîâåäåíî ãåíîòèïèðîâàíèå ïîëèìîðôíûõ ëîêóñîâ ãåíîâ APOE, LCT, UCP1 è VDR

A characteristic feature of the "global obesity epidemic" in recent decades is the rapid spread of overweight among the rural population. However, there is a lack of objective data on how this process is unfolding in the northern and Arctic regions of the Russian Federation. The aim of the work was to analyze the prevalence of malnutrition and rates of overweight and obesity in children living in Khanty-Mansi Autonomous Okrug - Yugra (KhMAO) and the Komi Republic (KR). Material and methods. We conducted a study of the nutritional status of rural children in the northern regions of the Russian Federation in 2018-2019. The subjects of the study were children aged 3-17 years of KhMAO, ethnic Khanty, Mansi and of various non-indigenous descent in small remote settlements (n=302) and 956 children in the administrative center of the northern district, a town-type residency. We also examined 7-17-year-old children (n=628) in large settlements of the KR, over 90% of them were ethnic Komi. For each individual, body mass index values (BMI) were calculated. The nutritional status was assessed by comparing the individual BMI with the age and sex specific standards set by the Ministry of Health of the Russian Federation (2017). Results and discussion. 74.4% of children aged 3-6 in KhMAO, and 70% of the 7-17-year-old children of KR and KhMAO meet the standards for their age-sex groups; 6.1% of children aged 3-17 are underweight and 19.5% are overweight. Among the 7-17-year-olds, the ratio of the underweight and overweight (including obese) differs significantly in the settlement dwellers of the KR from that in the living in small settlements of KhMAO (p=0.004), as well as in the group of town residents of KhMAO (p=0.017). The children of the KR have slightly higher percentage of the overweight and obese (26.6 vs 25.7 and 24.8% in the town and settlements of KhMAO, respectively), but significantly lower percentage of those who are underweight (1.9 vs 5.0 and 6.8%). The proportion of obese schoolchildren in small remote settlements of KhMAO is higher than that in the large settlements of KhMAO and in large settlements of the KR (13.1, 7.7 and 9.2%, respectively). Conclusion. There were no differences found between ethnic groups, however the role of social and anthropological factors in the formation of the nutritional status differences between the indigenous and non-indigenous children in Western Siberia calls for further investigation.

ВведениеÈññëåäîâàíèÿ â îáëàñòè ôèçè÷åñêîé àíòðîïîëîãèè ïîêàçàëè, ÷òî â áëèçêèõ óñëîâèÿõ îáèòàíèÿ äàaeå â íåðîäñòâåííûõ ïîïóëÿöèÿõ ìîãóò êîíâåðãåíòíî ñêëàäûâàòüñÿ ñõîäíûå êîìïëåêñû ìîðôî-ôèçèîëîãè÷åñêèõ ÷åðò