This study aimed to investigate the role ofESR1 and PGR gene polymorphisms in development of intrauterine growth restriction (IUGR) among Russian women in Central Russia.Study design: This case-control study recruited a total of 520 women in the third trimester of pregnancy, including 196 IUGR patients and 324 controls. The participants were unrelated women of self-reported Russian ethnicity. Participants were genotyped at 4 functionally significant polymorphisms of theESR1 (rs2234693, rs9340799) and the PGR (rs484389, rs1042838) genes. The association analysis was performed using logistic regression. Two polymorphisms, which were associated with IUGR, and 26 polymorphisms linked to them (r 2 !0.6) were analyzed for their functional significance in silico. Results: Haplotype TG of loci rs2234693-rs9340799ESR1 (OR = 1.94, p perm = 0.006) was associated with an increased risk of IUGR. Allele T of rs2234693 decreases expression of ESR1 in thyroid gland, allele T of rs2234693 and allele G of rs9340799 increase affinity to eight transcription factors (AP-4, HEN1, E2A, LBP-1, RP58, LUN, Ets and Hand). The loci that are linked (r 2 !0.6) to the IUGR-associated SNPs, have the cis-eQTL value (expression ESR1 in thyroid gland) and showed their regulatory effects in organs and tissues related to pathogenesis of IUGR. Conclusion:Haplotype TG defined by polymorphisms rs2234693-rs9340799 of theESR1 gene is associated with the development of IUGR in Russian women from Central Russia.

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The aim of this study was to explore the effects of pre-pregnancy overweight/obesity on the pattern of association of hypertension susceptibility genes with preeclampsia (PE). Ten single-nucleotide polymorphisms (SNPs) of the 10 genome-wide association studies (GWAS)-significant hypertension/blood pressure (BP) candidate genes were genotyped in 950 pregnant women divided into two cohorts according to their pre-pregnancy body mass index (preBMI): preBMI ≥ 25 (162 with PE and 159 control) and preBMI < 25 (290 with PE and 339 control). The PLINK software package was utilized to study the association (analyzed four genetic models using logistic regression). The functionality of PE-correlated loci was analyzed by performing an in silico database analysis. Two SNP hypertension/BP genes, rs805303 BAG6 (OR: 0.36–0.66) and rs167479 RGL3 (OR: 1.86), in subjects with preBMI ≥ 25 were associated with PE. No association between the studied SNPs and PE in the preBMI < 25 group was determined. Further analysis showed that two PE-associated SNPs are functional (have weighty eQTL, sQTL, regulatory, and missense values) and could be potentially implicated in PE development. In conclusion, this study was the first to discover the modifying influence of overweight/obesity on the pattern of association of GWAS-significant hypertension/BP susceptibility genes with PE: these genes are linked with PE in preBMI ≥ 25 pregnant women and are not PE-involved in the preBMI < 25 group.

In modern medicine, close attention is paid to the issues of reducing maternal morbidity and mortality, to the structure of which hypertensive disorders of gestation, especially preeclampsia, make a significant contribution. The complex pathomorphological mechanisms underlying the etiopathogenesis of this pregnancy complication occur long before the manifestation of pronounced clinical signs, which complicates the early diagnosis of preeclampsia and determines the relevance of the search for new preeclampsia-specific markers, including genetic ones. The aim of the study: To evaluate the associations of polymorphic markers of GWAS-significant candidate genes of hypertension with the development of severe preeclampsia. Materials and methods: The sample of women with moderate preeclampsia included 145 individuals, and the sample of women with severe preeclampsia included 72 patients. All subjects underwent genotyping of four polymorphic loci (rs8068318 TBX2, rs2681472 ATP2B1, rs4387287 OBFC1, rs1799945 HFE). The empirical distribution of genotypes and its correspondence to the theoretically expected one within the framework of the Hardy-Weinberg regularity are studied. Logistic regression analysis was carried out and associations of polymorphic loci with the development of severe and moderate preeclampsia were studied according to four genetic models, with the introduction of corrections for covariates. Results: It was found that rs8068318 of the TBX2 gene is associated with the development of severe preeclampsia in the framework of allelic (OR = 0.45; рperm = 0.004), additive (OR = 0.46; рperm = 0.002), dominant (OR = 0.42; рperm = 0.005) and recessive (OR = 0.22; рperm = 0.04) genetic models. The polymorphic locus rs8068318 of the TBX2 gene is localized in the region of hypersensitivity to DNase, the region of DNA regulatory motifs to four transcription factors, the region of histone tags marking enhancers and promoters in various organs and tissues, negatively regulates the expression of the TBX2-AS1 gene in adipose tissue and brain, the TBX2 gene in the thyroid gland, and is associated with the level of alternative splicing of TBX2-AS1 and RP11-332H18.5 genes in various tissues. Conclusion: The rs8068318 polymorphic marker of the TBX2 gene is associated with the development of severe preeclampsia in the population of the Central Chernozem region of the Russian Federation.

The aim of the study was directed at studying the sex-specific features of the correlation between genome-wide association studies (GWAS)-noticeable polymorphisms and hypertension (HTN). In two groups of European subjects of Russia (n = 1405 in total), such as men (n = 821 in total: n = 564 HTN, n = 257 control) and women (n = 584 in total: n = 375 HTN, n = 209 control), the distribution of ten specially selected polymorphisms (they have confirmed associations of GWAS level with blood pressure (BP) parameters and/or HTN in Europeans) has been considered. The list of studied loci was as follows: (PLCE1) rs932764 A > G, (AC026703.1) rs1173771 G > A, (CERS5) rs7302981 G > A, (HFE) rs1799945 C > G, (OBFC1) rs4387287 C > A, (BAG6) rs805303 G > A, (RGL3) rs167479 T > G, (ARHGAP42) rs633185 C > G, (TBX2) rs8068318 T > C, and (ATP2B1) rs2681472 A > G. The contribution of individual loci and their inter-locus interactions to the HTN susceptibility with bioinformatic interpretation of associative links was evaluated separately in men’s and women’s cohorts. The men–women differences in involvement in the disease of the BP/HTN-associated GWAS SNPs were detected. Among women, the HTN risk has been associated with HFE rs1799945 C > G (genotype GG was risky; ORGG = 11.15 ppermGG = 0.014) and inter-locus interactions of all 10 examined SNPs as part of 26 intergenic interactions models. In men, the polymorphism BAG6 rs805303 G > A (genotype AA was protective; ORAA = 0.30 ppermAA = 0.0008) and inter-SNPs interactions of eight loci in only seven models have been founded as HTN-correlated. HTN-linked loci and strongly linked SNPs were characterized by pronounced polyvector functionality in both men and women, but at the same time, signaling pathways of HTN-linked genes/SNPs in women and men were similar and were represented mainly by immune mechanisms. As a result, the present study has demonstrated a more pronounced contribution of BP/HTN-associated GWAS SNPs to the HTN susceptibility (due to weightier intergenic interactions) in European women than in men.