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In modern medical science great attention is paid to the clarification of the molecular mechanisms, which are the basis of adaptation to environmental factors of unusual origin and/or extraordinary strength. The aim of the study is to determine the features of a group of genes with low expression level, associated with hypoxia in the pancreas of Wistar rats under conditions of intermittent hypoxia. Materials and methods. The study was conducted on 10 white, sexually mature Wistar rats, which were divided into 2 groups (5 animals in each). Animals of group 1 were part of the control (intact) group. The animals of the 2nd group were subjected to hypoxic training according to the following scheme: for 15 days, 6 hours daily, namely on days 1–5 they simulated an ascent to a height of one to five kilometers above sea level under the conditions of a barometer, and the last 10 days 6 km above the sea level. To analyze gene expression, we used the polymerase chain reaction method with real-time reverse transcription (PCR) CFX-96 Touch™ (Bio-Rad, USA) and the RT2 Profiler™ PCR Array Rat Hypoxia Signaling Pathway kit (QIAGEN, Germany), where 84 genes were the subject of research in experimental animals. Results. According to the results of the PCR study of genes in the pancreas samples of intact animals and animals exposed to hypoxic training, it was established that out of 84 genes associated with hypoxia, a group of 5 genes with a low expression level (∆∆Ct < 30) was found. This pattern includes Bhlhe40 genes, Ctsa, Hif1a, Lox, and Slc16a3, the expression of which is statistically reduced. Thus, compared to the level of their expression in intact animals, the expression of Bhlhe40 decreased by 2.59 times, Ctsa by 6.02 times, Hif1a by 3.85 times, Lox by 3.01 times, and Slc16a3 by 2.40 times. Conclusions. Intermittent hypoxia reduces the expression of the Bhlhe40 gene by 2.59 times, which can be considered as an element of adaptation of cells to a low level of oxygen and modulation of genetic programs. The decrease in Ctsa gene expression by 6.02, Hif1a by 3.85, and Lox by 3.01 times during intermittent hypoxia demonstrates, that these effects can be used as sanogenic factors in insulin resistance and type 2 diabetes. The 2.40-fold decreased expression level of Slc16a3 is probably an element of metabolic adaptation and adaptation of the metabolic pathway of cells to hypoxia conditions.

The article presents data on the differential expression of genes of structural and regulatory proteins of connective tissue (COLIA1, fibronectin, elastin, TGF-β1, LOX) in women with pelvic organ prolapse and stigmas of undifferentiated connective tissue dysplasia (UCTD) compared to patients with prolapse but without UCTD stigmas. Research objectives: analysis of the prognostic significance of differential expression of structural and regulatory genes of connective tissue proteins COLIA1, fibronectin, elastin, TGF-β1, LOX as factors associated with the vaginal prolapse among Ukrainian women. Materials and methods. Vaginal tissue samples were taken from 18 patients at the menopausal age with vaginal prolapse III, IV degree, which required surgical correction during vaginal hysterectomy and/or plastic surgery of vaginal walls. The main group included 11 patients with clinical and anamnestic UCTD stigmas, the comparison group included 7 women without it. Gene expression analysis of structural and regulatory proteins of the extracellular matrix of connective tissue was performed using real-time quantitative polymerase chain reaction. The relative number of transcripts of the studied genes was normalized by the expression level of the GAPDH gene. The data were calculated using the 2–ΔΔCt method. Results. There was decrease in gene expression of the main structural proteins of the extracellular matrix of the connective tissue: COLIA1 (t=-1.7; p=0.044), fibronectin (t=1.66; p=0.047), elastin (t=-1.75, p=0,04), gene of the regulatory protein LOX (t=-1.8, p=0.035) and no statistically significant difference in the TGF-β1 gene in patients with pelvic organ prolapse and clinical and anamnestic UCTD stigmas. Conclusions. Statistically significant lower expression of the genes of the main structural proteins of the extracellular matrix of the connective tissue and the gene of the regulatory protein LOX in patients with pelvic organ prolapse and clinical and anamnestic UCTD stigmas is evidence of the importance of genetically determined pathological remodeling of the connective tissue in the etiology of genital prolapse.

In modern medical science great attention is paid to the clarification of the molecular mechanisms, which are the basis of adaptation to environmental factors of unusual origin and/or extraordinary strength. The aim of the study is to determine the features of a group of genes with low expression level, associated with hypoxia in the pancreas of Wistar rats under conditions of intermittent hypoxia. Materials and methods. The study was conducted on 10 white, sexually mature Wistar rats, which were divided into 2 groups (5 animals in each). Animals of group 1 were part of the control (intact) group. The animals of the 2nd group were subjected to hypoxic training according to the following scheme: for 15 days, 6 hours daily, namely on days 1–5 they simulated an ascent to a height of one to five kilometers above sea level under the conditions of a barometer, and the last 10 days 6 km above the sea level. To analyze gene expression, we used the polymerase chain reaction method with real-time reverse transcription (PCR) CFX96 TouchTM (Bio-Rad, USA) and the RT2 ProfilerTM PCR Array Rat Hypoxia Signaling Pathway kit (QIAGEN, Germany), where 84 genes were the subject of research in experimental animals. Results. According to the results of the PCR study of genes in the pancreas samples of intact animals and animals exposed to hypoxic training, it was established that out of 84 genes associated with hypoxia, a group of 5 genes with a low expression level (∆∆Ct < 30) was found. This pattern includes Bhlhe40 genes, Ctsa, Hif1a, Lox, and Slc16a3, the expression of which is statistically reduced. Thus, compared to the level of their expression in intact animals, the expression of Bhlhe40 decreased by 2.59 times, Ctsa by 6.02 times, Hif1a by 3.85 times, Lox by 3.01 times, and Slc16a3 by 2.40 times. Conclusions. Intermittent hypoxia reduces the expression of the Bhlhe40 gene by 2.59 times, which can be considered as an element of adaptation of cells to a low level of oxygen and modulation of genetic programs. The decrease in Ctsa gene expression by 6.02, Hif1a by 3.85, and Lox by 3.01 times during intermittent hypoxia demonstrates, that these effects can be used as sanogenic factors in insulin resistance and type 2 diabetes. The 2.40-fold decreased expression level of Slc16a3 is probably an element of metabolic adaptation and adaptation of the metabolic pathway of cells to hypoxia conditions. [ABSTRACT FROM AUTHOR]