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Item Mechanism of acitretin-induced relaxations in isolated rat thoracic aorta preparations(2022) Efe, Oguzhan Ekin; Aydos, Tolga Resat; Aydingoz, Selda Emre; 0000-0002-3243-7843; 0000-0001-7823-7620; 34411501; W-7908-2019; ABA-4291-2020Acitretin is a member of vitamin A-derived retinoids, and its effect on vascular smooth muscle had not yet been studied. The aim of this study is to investigate the effect of acitretin, a retinoid, on vascular smooth muscle contractility. Thoracic aorta preparations obtained from 34 male Sprague-Dawley rats (355 +/- 15 g) were studied in isolated organ baths containing Krebs-Henseleit solution. The relaxation responses were obtained with acitretin (10-12-10-4 M) in endotheliumpreserved and endothelium-denuded aorta preparations precontracted with submaximal concentration of phenylephrine (10-6 M). The role of retinoic acid receptors (RARs), nitric oxide, adenylyl, and guanylyl cyclase enzymes, and potassium channels in these relaxation responses were investigated. Acitretin produced concentration-dependent relaxations, which were independent of its solvent dimethylsulfoxide (DMSO), in endothelium-denuded phenylephrine-precontracted thoracic aorta preparations. While incubation with the RAR antagonist (AGN193109, 10-5 M) had no effect on these relaxations; nitric oxide synthase inhibitor (L-NG-Nitro arginine methyl ester (L-NAME), 10-4 M), adenylyl cyclase inhibitor (SQ2253, 10-5 M), guanylyl cyclase inhibitor (oxadiazolo [4,3-a] quinoxalin-1-one (ODQ), 10-6 M), and potassium channel blocker (tetraethylammonium (TEA), 10-2 M) significantly eliminated the relaxation responses induced by acitretin. Acitretin induces relaxation in rat isolated thoracic aorta preparations without endothelium, which may be mediated by nitric oxide, cyclic adenosine monophosphate, and cyclic guanosine monophosphate-dependent kinases and potassium channels.Item POLYPHARMACY PREVALENCE AMONG GERIATRIC PATIENTS IN PRIMARY HEALTHCARE SETTINGS ACROSS TURKEY: A CROSS-SECTIONAL ANALYSIS THROUGH THE NATIONWIDE PRESCRIPTION INFORMATION SYSTEM(2020) Aydos, ToIga Resat; Emre Aydingoz, Selda; Lux, Karl Michael; Efe, Oguzhan Ekin; Isli, Fatma; Aksoy, Mesil; Kadidoi, Esma; 0000-0002-3243-7843; 0000-0002-1832-9336; 0000-0001-7823-7620; W-7908-2019; AAJ-7279-2020; ABA-4291-2020Introduction: Polypharmacy has become a common health problem as populations age. We aimed to determine the prevalence of chronic and cumulative polypharmacy in the geriatric population using primary healthcare services in Turkey. Materials and Methods: The electronic prescriptions ordered by family physicians across Turkey for geriatric patients (>= 6.5 years) in the Prescription Information System during 2018 were studied. Chronic polypharmacy criteria were proportion of patients who were given prescriptions containing >= 5 drugs four or more times during a year. Cumulative polypharmacy was defined as proportion of patients who were prescribed >= 5 drugs with different ATC4 codes in a month or in each quarter of the year. Results: Turkey's total population is 82 million; 7,186,204 are aged 65 and over, constituting 8.8% of the total. Of this geriatric population, 6,104,798 (85.0%) had at least one prescription in 2018. Each geriatric patient had 6.4 prescriptions, with each prescription containing an average of 2.9 drugs with different fourth-level Anatomical Therapeutic Chemical codes. Each drug was prescribed in 2.7 boxes on average. Of these prescribed patients, 14.3% received prescriptions containing >= 5 drugs four or more times during 2018. The percentage of patients who received at least one prescription per month containing >= 5 drugs ranged between 16.4% and 20.7%. The most commonly prescribed drugs were acetylsalicylic acid, diclofenac, paracetamol, and pantoprazole. Conclusion: Polypharmacy is a critical health problem among geriatric population in Turkey as in other industrialized countries. Educating physicians as well as the public is essential to overcome polypharmacy.Item Effects of ozone therapy and taurine on ischemia/reperfusion-induced testicular injury in a rat testicular torsion model(2014) Aydos, Tolga Resat; Basar, Mehmet Murad; Kul, Oguz; Atmaca, Hasan Tank; Uzunalioglu, Tuba; Kisa, Ucler; Efe, Oguzhan Ekin; 25539540Background/aim: To investigate the effect of ozone and/or taurine treatment comparatively on testicular damage due to ischemia/reperfusion (I/R) injury in an experimental torsion model in rats. Materials and methods: Adult Wistar rats with and without torsion/detorsion were used. In order to monitor the effect of ozone and/or taurine treatment on testicular damage due to I/R injury, following histopathological investigation apoptotic indexes were scored by TUNEL method. Moreover, tumor necrosis factor receptor 1 (TNFR1), caspase 3, caspase 8, endothelial nitric oxide synthase (eNOS), tumor necrosis factor alpha (TNF alpha), and cytochrome C immunostainings were performed and the levels of malondialdehyde, glutathione peroxidase, superoxide dismutase, catalase, total sulthydryl, and nitric oxide were determined in the testicular tissue. Results: Intraperitoneal ozone and/or taurine treatment prevented both histopathological damage and increase in the apoptotic index. Torsion did not exert an effect on the levels of TNFa and cytochrome C. Ozone and/or taurine treatment prevented increases in TNFR1, caspase 3, and caspase 8. The level of oxidative stress markers was unchanged. The increases in NO level and eNOS expression were prevented by ozone and/or taurine treatment in I/R groups. Conclusion: Using ozone therapy and/or taurine before reperfusion may be a solution for germ cell degeneration resulting from testicular torsion and related infertility.