PATIENTS AND METHODS: Materials and methods: The study involved 120 patients with NAFLD, who were divided into two groups depending on BMI and the control group containing 20 practically healthy individuals.

RESULTS: Results: In patients with NAFLD with comorbid obesity, a statistically significant increase in the relative amount of Firmicutes (52.12 [42.38; 67.39]%) and Firmicutes/Bacteroidetes ratio (3.75 [1.7; 9.5]) against the background of a significant decrease in the amount of Bacteroidetes (13.41 [7.45; 26.07]%); in NAFLD patients with overweight, the relative amount of Firmicutes was 49.39 [37.47; 62.73]%, Firmicutes / Bacteroidetes ratio was 1.98 [1.15; 5.92], and the relative amount of Bacteroidetes was 23.69 [12.11; 36.16]%. In the control group, the distribution of the basic GM phylotypes was significantly different; the relative amount of Bacteroidetes was almost the same as of Firmicutes - 34.65 [24.58; 43.53]% and 29.97 [22.52; 41.75]% respectively, and the Firmicutes/Bacteroidetes ratio was 0.64 [0.52; 1.47].

AIM: The aim of study was to evaluate the relationship of β-adrenergic receptors gene polymorphisms with low triiodothyronine syndrome in patients with a heart failure.

MATERIALS AND METHODS: 354 patients with HF on a background of postinfarction cardiosclerosis were included to the study. At 89 (25.1%) patients LT3S was diagnosed. The course of HF was studied for 2 years. Mean levels of thyroid stimulating hormone (TSH), free T3f and T4f were evaluated. Genotyping of 4 single nucleotide polymorphisms (Gly389Arg of β1-AR gene, Ser49Gly of β1-AR gene, Gln27Glu of β2- AR gene and Ser275 of GNβ3 gene) was performed by polymerase chain reaction. Genetic and epidemiological analysis was performed using the SNPStats program.

RESULTS: The risk of LT3S in patients with HF increases with homozygous G/G variant of Gln27Glu polymorphism of the β2-AR gene (OR=2.21, p=0.037), described as a recessive model of inheritance. There was a tendency to increase the risk of LT3S development in the presence of the genotype C/T of the Ser275 polymorphism of the GNb3 gene (OR=1.75, p=0.054), described as an over-dominant model. The genotype C/G of the Gln27Glu polymorphism of the β2-AR gene was associated with a decreased risk of LT3S development (OR=0.54, p=0.037), described as over-dominant model. Patients with HF carriers the A allele (A/GA/A) of the Ser49Gly polymorphism of the β1-AR gene have a lower risk of repeated hospitalization due to HF decompensation (OR=0.50, p=0.032), described as a dominant model. There was a tendency to increase the risk of re-hospitalization in the G-allele (C/GG/ G) variant of the Gln27Glu polymorphism of the β2-AR gene (OR=1.68, p=0.057), described as a dominant heredity model. At patients with HF in combination with LT3S the risk of re-hospitalization increases at C/G variant of the Gln27Glu polymorphism of β2-AR gene (OR=1.25, p=0.025), described as an over-dominant model.