A Different Clinical Type of OSAS: REM-Related OSAS

Objective: Rapid eye movement (REM) is an entity in which the collapsibility of upper respiratory tract increases. Different opinions have been proposed with regard to the definition of REM-related obstructive sleep apnea syndrome (OSAS). Some authors consider REM-related OSAS as the first presentation, and others consider it as a different clinical type of OSAS. We aimed to compare the clinical and polysomnographic findings of REM-related and non-REM-related OSAS patients to test whether REM-related OSAS is a different clinical type OSAS or the manifestation of early stage or the onset of OSAS. Methods: The study had a retrospective design. Patients with an initial diagnosis of sleep-related breathing disorders were later diagnosed to have OSAS based on an apnea–hypopnea index (AHI) of ≥5 and were divided into the following two groups: patients with AHINREM of 2 whose REM recordings were obtained for at least 30 min were defined as having “REM-related OSAS,” and those who did not meet this description were defined as having “non-REM-related OSAS.” Results: A total of 329 patients with a mean age of 51±10 years were included in the study. Thirty-five (10.6%) patients with OSAS were REM-related and 294 (89.4%) were non-REM-related. Age, body mass index, smoking status, and concomitant diseases were comparable between groups (p>0.05). In REM-related patients, AHI was lower, REM duration was longer, and mean oxygen saturations were comparatively higher (p<0.05). Conclusion: Similarities between groups in age, body mass index, and concomitant disease suggest that REM-related OSAS is a different clinical type of OSAS, rather than the early phase of OSAS

The Relationship Between GPX1 Pro198Leu Manganese Superoxide Dismutase Ala16Val Variants and Obstructive Sleep Apnea Syndrome

Objective: To investigate the association between obstructive sleep apnea syndrome (OSAS), glutathione peroxidase-1 (GPX1) Pro198Leu, and manganese superoxide dismutase (MnSOD) Ala16Val gene polymorphisms. Materials and Methods: The study included 81 patients with OSAS and 75 healthy controls from the Turkish population. Genotypes of the MnSOD rs4880 T/C (Ala16Val) and GPX1 rs1050450 T/C (Pro198Leu) variants were determined via single-nucleotide polymorphisms genotyping analysis, which is based on simple probe melting curve analysis. Results: The frequencies of the MnSOD rs4880 T/T, T/C, and C/C were 35.8%, 50.6%, and 13.5% in patients with OSAS and 34.6%, 49.3%, and 16% in the controls, respectively. No statistically significant difference was determined between patients and controls in terms of MnSOD rs4880 variant genotype and allele distribution (odds ratio: 1.07; 95% confidence interval: 0.68-1.69; p>0.05). The frequencies of the GPX1 rs1050450T/T, T/C, and C/C were 12.0%, 38.5%, and 49.4% in patients with OSAS and 13.1%, 42.1%, and 44.7% in the controls, respectively. No statistically significant difference was determined in the genotype and allele frequencies of the GPX1 rs1050450 variant between the patients and controls (p>0.05). Additionally, the haplotype was examined on the basis of combined genotypes for the two variants in patients with OSAS and controls, which revealed no statistically significant correlation. Conclusion: Our study indicates that two polymorphisms in these antioxidant enzymes were not associated with Turkish patients with OSAS. Further studies may reveal an association between these two polymorphisms with some clinical parameters in patients with OSAS

A Case of Sinus Venous Thrombosis Caused by Obstructive Sleep Apnea Syndrome

Obstrüktif uyku apne sendromu (OSAS) serebrovasküler sistemle ilişkili birçok komplikasyona yol açabilmektedir. Hipoksi, inflamasyon, oksidatif stres ve hiperkoagülabilite, serebrovasküler patolojinin gelişiminde rol oynayan patofizyolojik mekanizmalardır. Bu yazıda sinüs ven trombozu ile seyreden ve pozitif havayolu basıncı tedavisi ile semptomlarında düzelme izlenen 31 yaşında bir OSAS olgusu sunulmuştur.Obstructive sleep apnea syndrome (OSAS) can lead to many complications associated with cerebrovascular system. Pathophysiological mechanisms in the development of cerebrovascular pathology include hypoxia, inflammation, oxidative stress and hypercoagulability. Herein, we report a 31-year-old patient with OSAS which was associated with sinus venous thrombosis whose symptoms improved with positive airway pressure therapy

The evaluation of airway inflammation in asymptomatic obeses

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Obstructive sleep apnea is a risk factor for osteoarthritis.

Obstructive sleep apnea (OSA) syndrome is closely associated with cardiovascular and metabolic disorders. Recent studies reported that osteoarthritis (OA) is associated with cardiovascular disease as well as inflammation defined as "metabolic disorder". Due to the strong association of metabolic disorders with both OA and OSA, we aimed to investigate the association between severity of OSA and osteoarthritis grade based on X-Ray

Endocan: a novel predictor of endothelial dysfunction in obstructive sleep apnea syndrome

Background and Aims: Obstructive sleep apnea syndrome (OSA) is an independent risk factor for endothelial dysfunction and cardiometabolic diseases. Plasma endocan levels are elevated in a large number of diseases, and is a novel surrogate endothelial cell dysfunction marker. We aimed to assess the role of serum endocan level as a potential mechanism of endothelial dysfunction in OSA patients