ArticleBulletin of experimental biology and medicine2023
The State of the LPO-AOD System and the Relative Length of Telomeric Repeats in the Chromosomes of Blood Leukocytes in Obstructive Sleep Apnea Syndrome.
Article in Bulletin of experimental biology and medicine, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
We analyzed the relative length of telomeric repeats in peripheral blood leukocytes and indicators of oxidative stress in 32 men (mean age 51.2±3.1 years) with obstructive sleep apnea syndrome (OSAS). The control group consisted of volunteers without OSAS. The relative length of telomeres was determined in a DNA sample isolated from venous whole blood samples. The length of telomeric repeats of chromosomes was determined using quantitative real-time PCR (3 times for each DNA sample); albumin served as an internal control. The intensity of LPO processes and antioxidant protection was assessed by conventional spectrophotometric methods. It was found that in patients with OSAS, the relative length of telomeric repeats was lower by 48%, the levels of substrates and products of LPO were higher (double bonds and diene conjugates by 34 and 19%, respectively), and antioxidant protection indicators were lower (concentrations of fat-soluble vitamins α-tocopherol and retinol by 18 and 19.3%, respectively, total antioxidant activity by 32.9%) than in volunteers of the control group. Thus, we can conclude that the nucleotide sequences are reduced in patients with OSAS under conditions of intensified free radical oxidation.
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