BACKGROUND: The current obstructive sleep apnea (OSA) diagnostic uses polysomnography or limited polygraphy and requires specialized personnel and technical equipment. Glycoprotein biomarkers and microRNAs are being explored as a possible new method for screening. We aimed to evaluate whether certain biomarkers and microRNA, previously identified as related to OSA, could be influenced by factors such as gender, age, and obesity level in patients with OSA. METHODS: In this retrospective analytical study, patients with moderate to severe OSA (n = 130) were compared with the control group. Serum levels of selected biomarkers and microRNA were taken from both groups. The group of OSA patients was then stratified by gender, obesity level, and age to see the possible influence of those variables on biomarker levels. RESULTS: Levels of all studied biomarkers - C-reactive protein (CRP), high-sensitivity troponin I (hsTnI), pentraxin-3 (PTX-3), and microRNA-499 were significantly higher in patients with OSA compared to the control group. In the OSA group only hsTnI showed a statistically significant relationship with gender. Levels of CRP and hsTnI showed a significant dependence on the level of obesity. Dependency on age was proven for hsTnI. CRP, PTX-3, and microRNA-499 did not have any statistically significant relationship with age. CONCLUSION: We found that serum levels of pentraxin-3 and microRNA-499 in patients with moderate to severe obstructive sleep apnoea are independent of gender, obesity, and age. CRP was affected by the level of obesity and hsTnI was influenced by all 3 variables. We consider these findings important for further research of OSA biomarkers.

• Klíčová slova
• Biomarkers, Diagnostic process, Obstructive sleep apnoea, microRNA,
• MeSH
• biologické markery * krev   MeSH
• C-reaktivní protein * analýza   metabolismus   MeSH
• dospělí MeSH
• glykoproteiny krev   genetika   MeSH
• lidé středního věku MeSH
• lidé MeSH
• mikro RNA * krev   MeSH
• obezita * krev   genetika   MeSH
• obstrukční spánková apnoe * krev   genetika   MeSH
• retrospektivní studie MeSH
• senioři MeSH
• sérový amyloidový protein metabolismus   analýza   genetika   MeSH
• sexuální faktory MeSH
• troponin I krev   MeSH
• věkové faktory MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• biologické markery * MeSH
• C-reaktivní protein * MeSH
• glykoproteiny MeSH
• mikro RNA * MeSH
• MIRN499 microRNA, human MeSH Prohlížeč
• PTX3 protein MeSH Prohlížeč
• sérový amyloidový protein MeSH
• troponin I MeSH

Background: Obstructive sleep apnea syndrome (OSAS) is one of the most common sleep-related breathing disorders. The aim of this study was to improve diagnostics in OSAS using blood circulating biomarkers. We consider the potential of cardiac-specific miRNAs in the diagnosis and risk assessment of cardiovascular complications. Materials & methods: Plasmatic levels of miR-1-3p, miR-133a-3p and miR-499a-5p were measured by reverse transcription-PCR and compared with the clinical status of OSAS patients and controls. Results: The level of miR-499 was higher (p = 0.0343) in OSAS patients (mean expression: 0.00561) compared with the controls (mean expression: 0.00003), using the multivariate logistic regression. Conclusion: The role of miR-499 in gene expression regulation during hypoxia and our findings indicate that miR-499 could be a new diagnostic biomarker for OSAS.

• Klíčová slova
• biomarker, cardiovascular disease, miR1, miR133a, miR499, miRNA, sleep apnea syndrome,
• MeSH
• biologické markery krev   MeSH
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• logistické modely MeSH
• mikro RNA genetika   MeSH
• multivariační analýza MeSH
• obstrukční spánková apnoe krev   diagnóza   genetika   MeSH
• polymerázová řetězová reakce s reverzní transkripcí MeSH
• regulace genové exprese MeSH
• ROC křivka MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• biologické markery MeSH
• mikro RNA MeSH
• MIRN499 microRNA, human MeSH Prohlížeč

Obstructive sleep apnea (OSA) is associated with insulin resistance, glucose intolerance, and type 2 diabetes. Causal mechanisms mediating this association are not well defined; however, augmented lipolysis in adipose might be involved. Here, we investigated the effect of acipimox treatment (lipolysis inhibitor) on glucose tolerance and insulin sensitivity in mice exposed to intermittent hypoxia (IH). C57BL6/J mice were exposed for 14 days to IH or control conditions. IH was created by decreasing the fraction of inspired oxygen from 20.9 to 6.5%, 60 times/h. Control exposure was air (fraction of inspired oxygen, 20.9%) delivered at an identical flow rate. Acipimox was provided in drinking water (0.5 g/ml) during exposures. After exposures, intraperitoneal insulin (0.5 IU/kg) and glucose (1 g/kg) tolerance tests were performed, and primary adipocytes were isolated for lipolysis experiments. IH elevated fasting glucose by 51% and worsened glucose tolerance and insulin sensitivity by 33 and 102%, respectively. In parallel, IH increased spontaneous lipolysis by 264%, and reduced epididymal fat mass by 15% and adipocyte size by 8%. Acipimox treatment prevented IH-induced lipolysis and increased epididymal fat mass and adipocyte size by 19 and 10%, respectively. Acipimox fully prevented IH-induced impairments in fasting glycemia, glucose tolerance, and insulin sensitivity. For all reported results, P less than 0.05 was considered significant. Augmented lipolysis contributes to insulin resistance and glucose intolerance observed in mice exposed to IH. Acipimox treatment ameliorated the metabolic consequences of IH and might represent a novel treatment option for patients with obstructive sleep apnea.

• Klíčová slova
• diabetes, insulin resistance, intermittent hypoxia, lipolysis, obstructive sleep apnea,
• MeSH
• adipozita účinky léků   MeSH
• experimentální diabetes mellitus krev   komplikace   genetika   patologie   MeSH
• fenotyp MeSH
• glukosa metabolismus   MeSH
• hypoxie komplikace   metabolismus   MeSH
• inzulin metabolismus   MeSH
• lipolýza * účinky léků   MeSH
• mastné kyseliny krev   MeSH
• modely nemocí na zvířatech MeSH
• myši inbrední C57BL MeSH
• obstrukční spánková apnoe krev   komplikace   genetika   patologie   MeSH
• pyraziny farmakologie   MeSH
• regulace genové exprese účinky léků   MeSH
• signální transdukce účinky léků   MeSH
• tukové buňky účinky léků   patologie   MeSH
• zvířata MeSH
• Check Tag
• mužské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Research Support, N.I.H., Extramural MeSH
• Názvy látek
• acipimox MeSH Prohlížeč
• glukosa MeSH
• inzulin MeSH
• mastné kyseliny MeSH
• pyraziny MeSH