Scopus İndeksli Açık & Kapalı Erişimli Yayınlar

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Author: search.filters.author.Efe, Oguzhan Ekin

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    Effect of rosuvastatin on spatial learning, memory, and anxiety-like behaviour in ovariectomized rats
    (2022) Emre-Aydingoz, Selda; Lux, Karl Michael; Efe, Oguzhan Ekin; Topcu, Deniz Ilhan; Erdem, Saban Remzi; 0000-0001-7823-7620; 0000-0002-3243-7843; 0000-0002-1219-6368; 35993621; ABA-4291-2020; W-7908-2019; E-3717-2019
    The effect of rosuvastatin (Ros) on cognitive function and anxiety-like behaviour in ovariectomized rats were evaluated. Eighteen female Wistar rats (218-310g, 6-8 months old) were allocated into sham (n = 6), ovariectomy (Ovx, n = 6) or Ovx + Ros (up to eighth week n = 6, then n = 4) groups. Ros was administered at 20 mg/kg/day by oral gavage for 12 weeks. Behavioural tests were performed at 4, 8 and 12 weeks following Ovx. At 12weeks, Ovx group had significantly longer escape latency than the sham group at the first day of the four-day training period of the Morris Water Maze test (p < .01). In the Elevated Plus Maze test, Ovx group spent significantly more time in the closed arms than the sham group (p < .01), and this anxiety-like behavioural effect of Ovx was prevented by 12-weeks Ros treatment (p < .05). In conclusion, Ros prevents memory deficit and anxiety-like behaviour in the ovariectomized rats, a model for human surgical menopause.
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    Reporting quality of animal studies published in journals listed in ULAKBIM TR index: a systematic review on compliance to the ARRIVE guidelines
    (2022) Aydingoz, Selda Emre; Efe, Oguzhan Ekin; Caliskan, Gokce; 0000-0001-7823-7620; 0000-0002-3243-7843; ABA-4291-2020; W-7908-2019
    Transparent reporting of animal studies is key to ensure reproducibility. The primary guideline for reporting animal studies is the ARRIVE (Animal Research: Reporting of In Vivo Experiments). We aimed to evaluate the compliance to the updated ARRIVE guidelines (version 2.0, date 2020) in animal studies published in journals indexed by the Turkish Academic Network and Information Centre (ULAKBIM TR Index). This was a retrospective analysis of reporting quality of animal studies published in journals listed in ULAKBIM TR Index between January 2010 and August 2021. The percentage of articles that fully reported each " of the ARRIVE Essential 10: Compliance Questionnaire was calculated, and effects of journal- and article-related factors were evaluated. Totally, 235 articles published in 89 journals were included into the analysis. The mean percentage of fully reported items was 59.1%+/- 10.9%, the least reported items being those related with bias - "blinding", "allocation to study groups", "assessment of statistical assumptions", "excluded animals", and "sample size calculation" (0.9%-10.6%). The journal's publisher, frequency, language, being indexed in the Science Citation Index Expanded, and the ratio of animal studies had no significant effect on this percentage (p>0.05). However, journals supporting the ARRIVE guidelines had significantly and higher compliance (62.1 %+/- 10.1% vs. 58.2%+/- 11.0% for supporters and non-supporters, respectively; p=0.017, 95%CI -7.0 to-0.7). Articles published after 2015 had higher compliance to the ARRIVE guidelines than those published previously (60.9%+/- 10.4% vs. 57.9%+/- 11.1%, respectively; p=0.037, 95%CI -5.8 to -0.2). Although progress has been made, compliance to the ARRIVE guidelines is still low in animal studies published in journals listed in ULAKBIM TR Index-Turkey's scientific journal database that covers over 800 peer-review journals. In order to increase the reporting quality and reproducibility of animal studies, it is imperative to raise awareness among researchers and journals, and to enforce the ARRIVE guidelines in editorial policy of journals.
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    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-4291-2020
    Acitretin 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.