The S allele frequencies of serotonin transporter gene 5-HTTLPR, which is associated with a number of psychiatric disorders, were found for 21 populations of Eurasia and Africa. The principal components of genetic variability (PC1 and PC2) based on the published frequencies for 68 alleles at five STR loci of CODIS, which are supposed to be neutral, were calculated for the same populations. The S allele frequency is correlated to PC2 (R = 0.820, p < 0.0001); this means that the correlation corresponds to the general genetic variability in the studied populations. The correlation between the STR allele frequency and Hofstede’s individualism-collectivism dimension index for 4 of the 68 studied alleles is even higher than the correlation of the S allele frequency. Our findings do not support the hypothesis (Chiao and Blizinsky, 2010) on the culture-gene coevolution of the S allele frequency and the level of collectivism.

Allele and genotype frequencies of the − 174G / C polymorphism (rs1800795) in the regulatory region of the IL6 gene, which encode anti-inflammatory cytokine interleukin 6, were determined in seven populations representing five ethnic groups from the European part of Russia (440 individuals), as well as in small cohorts that represent populations from 24 countries of Africa and Eurasia (365 individuals). The maps of the geographic distribution of the − 174G / C allele frequencies were constructed based on personal (22 populations) and the literature data (66 populations), and the data from dbSNP database obtained by the HapMap project (10 populations). The frequency of the − 174G allele varied from 45 to 100% and was characterized by nonrandom geographic distribution. These data could reflect the adaptive load of the alleles examined, which was different in different regions of the world. It is suggested that the level of pathogen prevalence is one of the environmental factors that determine different adaptive values of the IL6*-174G / C alleles. This suggestion is supported by a positive correlation between the − 174G allele frequency and level of pathogen prevalence calculated based on historical data ( R = 0.768; p < 0.0001).

Allele and genotype frequencies of the -174G/C polymorphism (rs1800795) in the regulatory region of the IL6 gene, which encode anti-inflammatory cytokine interleukin 6, were determined in seven populations representing five ethnic groups from the European part of Russia (440 individuals), as well as in small cohorts that represent populations from 24 countries of Africa and Eurasia (365 individuals). The maps of the geographic distribution of the -174G/C allele frequencies were constructed based on personal (22 populations) and the literature data (66 populations), and the data from dbSNP database obtained by the HapMap project (10 populations). The frequency of the -174G allele varied from 45 to 100% and was characterized by nonrandom geographic distribution. These data could reflect the adaptive load of the alleles examined, which was different in different regions of the world. It is suggested that the level of pathogen prevalence is one of the environmental factors that determine different adaptive values of the IL6*--174G/C alleles. This suggestion is supported by a positive correlation between the -174G allele frequency and level of pathogen prevalence calculated based on historical data (R = 0.768; p < 0.0001).

The pedigree with familial hypercholesterolemia is presented. Heterozygous and homozygous forms of familial hypercholesterolemia were detected among family members by means of number LDL-receptor determination.