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    Comparison of a manual walking platform and the CatWalk gait analysis system in a rat osteoarthritis model
    (Wroclaw Medical Univ, 2021) Kara, Halil; Caglar, Ceyhun; Asilturk, Mehmet; Karahan, Siyami; Ugurlu, Mahmut
    Background. Effects of osteoarthritis (OA) are observed in experimental animal models using different gait analysis systems. Objectives. The aim of this study was to determine whether the Noldus CatWalk XT v. 10.9 gait analysis sys-tem (CatWalk) device can be used effectively in a chemically induced rat OA model and to reveal the strengths and weaknesses of the system compared to manual gait analysis. Materials and methods. Ten Wistar rats were run on a manual walking platform as well as on the CatWalk and the basal values were recorded. For OA induction, monosodium iodoacetate (MIA) was injected into the left knee of all rats under anesthesia. After a period of 4 weeks for OA development, the rats were again run on both the manual and CatWalk gait platforms. For manual gait analysis, the stride length, paw print width and paw print length were measured on both knees. In addition to these parameters, the average run speed, run duration, maximum contact intensity, paw print area, mean stance, and swing speed were measured on the left knee (affected knee) using the CatWalk device. Results. Significant differences were observed in the stride width (p = 0.0272), left stride length (p = 0.0344), and left paw print length (p = 0.0233) recorded before and after OA via the manual walking platform. For CatWalk, a significant difference was detected in the left knee's average run speed (p = 0.0010), maximum contact intensity (p = 0.0155), paw print length (p = 0.0058), paw print width (p = 0.0324), and swing speed (p = 0.0066) based on data obtained before and after OA. Conclusions. The CatWalk gait analysis system is suitable for the evaluation of OA rat models and related interventions. It also provides additional parameters compared to the manual system and minimizes human-related variation.
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    Effect of Exenatide on Liver in an Iron Overload Rat Model
    (Wiley-Blackwell, 2015) Kuskonmaz, Serife Mehlika; Dursun, Ali Dogan; Kara, Halil; Sarikaya, Badegul; Bayraktar, Aslihan Cavunt; Kucuk, Aysegul; Arslan, Mustafa
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    Effects of alprostadil and iloprost on renal, lung, and skeletal muscle injury following hindlimb ischemia-reperfusion injury in rats
    (Dove Medical Press Ltd, 2016) Erer, Dilek; Ozer, Abdullah; Demirtas, Huseyin; Gonul, Ipek Isik; Kara, Halil; Arpaci, Hande; Kucuk, Aysegul
    Objectives: To evaluate the effects of alprostadil (prostaglandin [PGE1] analog) and iloprost (prostacyclin [PGI2] analog) on renal, lung, and skeletal muscle tissues after ischemia reperfusion (I/R) injury in an experimental rat model. Materials and methods: Wistar albino rats underwent 2 hours of ischemia via infrarenal aorta clamping with subsequent 2 hours of reperfusion. Alprostadil and iloprost were given starting simultaneously with the reperfusion period. Effects of agents on renal, lung, and skeletal muscle (gastrocnemius) tissue specimens were examined. Results: Renal medullary congestion, cytoplasmic swelling, and mean tubular dilatation scores were significantly lower in the alprostadil-treated group than those found in the I/R-only group (P<0.0001, P=0.015, and P<0.01, respectively). Polymorphonuclear leukocyte infiltration, pulmonary partial destruction, consolidation, alveolar edema, and hemorrhage scores were significantly lower in alprostadil- and iloprost-treated groups (P=0.017 and P=0.001; P<0.01 and P<0.0001). Polymorphonuclear leukocyte infiltration scores in skeletal muscle tissue were significantly lower in the iloprost-treated group than the scores found in the nontreated I/R group (P<0.0001). Conclusion: Alprostadil and iloprost significantly reduce lung tissue I/R injury. Alprostadil has more prominent protective effects against renal I/R injury, while iloprost is superior in terms of protecting the skeletal muscle tissue against I/R injury.
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    Effects of iron overload and exenatide on erythrocyte deformability in a rat model
    (Comenius Univ, 2015) Kuşkonmaz, Şerife Mehlika; Kara, Halil; Çomu, Faruk Metin; Küçük, Ayşegül; Arslan, Mustafa
    Iron overload is known to affect erythrocyte membrane properties and erythrocyte shape. We hypothesized that iron overload which directly affects the erythrocyte morphology may also interfere with erythrocyte deformability (ED). Exenatide, a glucagon like peptide -1 (GLP-1) analogue used in the treatment of diabetes, is known to have beneficial pleiotropic effects on endothelial function and blood flow which are different from its glucose-lowering effects. In our study we aimed to test the effect of iron overload on ED in a rat model (1) and to evaluate the effect of exenatide on ED in the same model (2). For this purpose, the animals were randomly divided into three groups, each containing 6 rats. Rats in the control group (Group C) were given intraperitoneal injections of saline as placebo. The second group (Group Fe) was given intraperitoneal iron dextran (60 mg/kg/day) five days a week for 4 weeks to develop iron overload. The third group (Group Fe + E) received subcutaneous injections of 10 mcg exenatide (Byetta (R) Lilly Pharma) in two divided doses for 4 weeks in addition to iron dextran. We observed that ED index was significantly higher in Group Fe when compared to Group C and Group Fe+E (p <0.0001, p <0.0001). Administration of exenatide to the iron-loaded rats (Group Fe +E) led to a significant decrease in the deformability index (p < 0.017) when compared to Group Fe. Our study shows a decrease in ED with iron and beneficial effect of exenatide on ED in the iron-overloaded rat model (Fig. 1, Ref. 24). Text in PDF www.elis.sk.
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    Effects of iron overload and exenatide on erythrocyte deformability in a rat model (conferenceObject)
    (Wiley-Blackwell, 2015) Kuşkonmaz, Şerife Mehlika; Kara, Halil; Çomu, Faruk Metin; Küçük, Ayşegül; Arslan, Mustafa
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    Factors Affecting Burden of Psychopharmacological Medication in Patients with Autism Spectrum Disorder: The Importance of Early Diagnosis
    (Kure Iletisim Grubu A S, 2016) Bodur, Şahin; Taşkıran, Candan; Işıldar, Yetiş; Alan, Burcu Ersöz; Çetinkaya, Miray; Kara, Halil; Şahin, Mehmet
    Objective: The aim of the present study is to specify the frequency in psychopharmacological medication use in children with autism spectrum disorder (ASD) and determine their age range at diagnosis. Methods: Five hundred and twenty three children with ASD who applied to Dr. Sami Ulus Maternity and Children Research and Training Hospital between 2010-2015 were reviewed retrospectively. Data has been obtained from computerized hospital information system. Individuals with the diagnosis of Autism (F84.0), Atypical Autism (F84.1) and Pervasive Developmental Disorder Not Other Specified (F84.9) were screened. Results: Psychotropic medication was recommended to 28.5% of the 523 children and adolescents diagnosed with ASD. Antipsychotics were the most common drugs of choice among psychotropic medications. The mean age at diagnosis of patients taking psychotropic medication was significantly higher than that of the patients who were not taking psychotropic medication (t=-3.064; p<0.01). The rate of psychotropic drug usage in female patients was significantly high than male patients (chi(2)=6.675; p=0.01). Conclusion: The results of the present study suggest that the delay of diagnosis can be included as a factor for psychotropic medication need of patients with ASD. Nearly half of the patients have been diagnosed in the first three years of their life. For further benefits of studies in Turkey, evaluating the psychopharmacological drug prescription rate, age of diagnosis and related factors to determine the present situation of psychotropic medication in our country will be necessary.
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    The relationship of serum vitamin D receptor levels with disease activity and clinical parameters in patients with ankylosing spondylitis
    (Baycinar Medical Publ-Baycinar Tibbi Yayincilik, 2019) Kultur, Turgut; Oztas, Dilek; Keskin, Dilek; Keskin, Goksal; Inal, Ali; Kara, Halil
    Objectives: The aim of this study was to investigate the relationship between serum vitamin D receptor (SVDR) levels and disease activity parameters in patients with ankylosing spondylitis (AS). Patients and methods: Between July 2016 and January 2017, a total of 62 patients (51 males, 11 females; mean age 36.5 +/- 12.8 years; range, 23 to 49 years) with AS and 32 healthy volunteers (25 males, 7 females; mean age 41.57 +/- 13.6 years; range, 26 to 48 years) were included in the study. The SVDR levels were measured using the enzyme-linked immunosorbent assay. Erythrocyte sedimentation rate (ESR) and serum C-reactive protein (CRP) levels were recorded. The Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) scores were used to assess disease activity. Results: Although there was no significant difference between the patient and control groups (p=0.66), SVDR levels were significantly elevated in patients with active AS (BASDAI score >= 4) (p=0.01). The SVDR levels significantly increased in AS patients with peripheral joint involvement and enthesitis (p=0.01, p=0.05, respectively). The SVDR levels significantly elevated in patients treated with non-steroidal anti-inflammatory drugs, compared to those treated with biological agents and control group (p=0.01, p=0.03, respectively). The SVDR levels were positively correlated with the BASDAI, CRP and ESR in the patient group (p=0.01, r=0.751; p=0.01, r=0.75; p=0.01, r=0.81, respectively). Conclusion: Our study results suggest that serum SVDR levels are associated with the disease activity and clinical parameters in patients with AS. Based on these findings, SVDR level may be used as a marker of disease activity in AS.