Browsing by Author "Yilmaz, Zeki"
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Publication Choline or cdp-choline restores hypotension and improves myocardial and respiratory functions in dogs with experimentally-induced endotoxic shock(Elsevier, 2021-10-27) Ozarda, Yesim; Ceron, Jose Joaquin; Buturak, Ali; Ulus, Ismail H.; Kocaturk, Meric; KOCATÜRK, MERİÇ; Yilmaz, Zeki; YILMAZ, ZEKİ; Cansev, Mehmet; CANSEV, MEHMET; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Farmakoloji Anabilim Dalı.; Bursa Uludağ Üniversitesi/Veteriner Fakültesi.; 0000-0002-2849-1222; 0000-0001-9836-0749; 0000-0003-2918-5064; 0000-0002-8654-1793; H-9043-2015; D-5340-2015; V-5578-2017; A-9637-2008Endotoxin shock is associated with severe impairments in cardiovascular and respiratory functions. We showed previously that choline or cytidine-5 '-diphosphocholine (CDP-choline) provides beneficial effects in experimental endotoxin shock in dogs. The objective of the present study was to determine the effects of choline or CDPcholine on endotoxin-induced cardiovascular and respiratory dysfunctions. Dogs were treated intravenously (i.v.) with saline or endotoxin (LPS, 0.1 mg/kg) 5 min before i.v. infusion of saline, choline (20 mg/kg) or CDP-choline (70 mg/kg). Blood pressure, cardiac rate, myocardial and left ventricular functions, respiratory rate, blood gases, serum electrolytes and cardiac injury markers were determined before and at 0.5-48 h after endotoxin. Plasma tumor necrosis factor alpha (TNF-alpha), high mobility group box-1 (HMGB1), catecholamine and nitric oxide (NO) levels were measured 2 h and 24 h after the treatments. Endotoxin caused immediate and sustained reductions in blood pressure, cardiac output, pO2 and pH; changes in left ventricular functions, structure and volume parameters; and elevations in heart rate, respiratory rate, pCO2 and serum electrolytes (Na, K, Cl, Ca and P). Endotoxin also resulted in elevations in blood levels of cardiac injury markers, TNF-alpha, HMGB1, catecholamine and NO. In choline- or CDP-choline-treated dogs, all endotoxin effects were much smaller in magnitude and shorter in duration than observed values in controls. These data show that treatment with choline or CDP-choline improves functions of cardiovascular and respiratory systems in experimental endotoxemia and suggest that they may be useful in treatment of endotoxin shock in clinical setting.Publication Effect of pimobendan in the treatment of pulmonary hypertension in a cat with giant right atrium(Kafkas Univ, Veteriner Fakultesi Dergisi, 2020-09-01) Tanaka, Ryou; Levent, Pınar; Sarıl, Ahmet; SARIL, AHMET; Kocatürk, Meriç; KOCATÜRK, MERİÇ; Yilmaz, Zeki; YILMAZ, ZEKİ; Bursa Uludağ Üniversitesi/Veteriner Fakültesi/Dahiliye Anabilim Dalı.; 0000-0002-2849-1222; 0000-0001-9836-0749; V-5578-2017; A-9637-2008Publication Estimation of pulmonary arterial wave reflection by echo-doppler: A preliminary study in dogs with experimentally-induced acute pulmonary embolism(Frontiers Media Sa, 2021-12-08) Yoshida, Tomohiko; Uejima, Tokuhisa; Komeda, Syunta; Matsuura, Katsuhiro; Uemura, Akiko; Hayama, Hiromasa; Yamashita, Takeshi; Tanaka, Ryou; Yilmaz, Zeki; YILMAZ, ZEKİ; Bursa Uludağ Üniversitesi/Veteriner Fakültesi.; 0000-0003-4311-9311; 0000-0002-6047-2865; 0000-0003-2671-5074; 0000-0001-6702-7150; 0000-0002-2544-8464; 0000-0001-9836-0749; 0000-0001-9948-6490; HQY-9709-2023; CAH-7393-2022; AHB-6165-2022; A-9637-2008; M-3078-2019Background: Pulmonary arterial (PA) wave reflection provides additional information for assessing right ventricular afterload, but its applications is hampered by the need for invasive pressure and flow measurements. We tested the hypothesis that PA pressure and flow waveforms estimated by Doppler echocardiography could be used to quantify PA wave reflection.Methods: Doppler echocardiographic images of tricuspid regurgitation and right ventricular outflow tract flow used to estimate PA pressure and flow waveforms were acquired simultaneously with direct measurements with a dual sensor-tipped catheter under various hemodynamic conditions in a canine model of pulmonary hypertension (n = 8). Wave separation analysis was performed on echo-Doppler derived as well as catheter derived waveforms to separate PA pressure into forward (Pf) and backward (Pb) pressures and derive wave reflection coefficient (RC) defined as the ratio of peak Pb to peak Pf.Results: Wave reflection indices by echo-Doppler agreed well with corresponding indices by catheter (Pb: mean difference = 0.4 mmHg, 95% limits of agreement = -4.3 to 5.0 mmHg; RC: bias = 0.13, 95% limits of agreement = -0.25 to 0.26). RC correlated negatively with PA compliance.Conclusion: This echo-Doppler method yields reasonable measurement of reflected wave in the pulmonary circulation, paving the way to a more integrative assessment of pulmonary hemodynamics in the clinical setting.Publication Identification of serum proteins in dogs naturally infected with Anaplasma phagocytophilum and Borrelia burgdorferi: A pilot study(Hellenic Veterinary Medical Soc, 2021-10-01) Martinez, L. F.; Escribano, D.; Schanilec, P.; Martinez-Subiela, S.; Tvarijonaviciute, A.; Ceron, J. J.; Yilmaz, Z.; Kocatürk, M.; Levent, P.; Sarıl, A.; SARIL, AHMET; Cihan, H.; Yilmaz, Zeki; YILMAZ, ZEKİ; Yalcin, E.; YALÇIN, EBRU; Bursa Uludağ Üniversitesi/Veteriner Fakültesi; 0000-0001-9836-0749; 0000-0002-6697-6079; ; ACP-9956-2022; A-9637-2008; ACP-9956-2022Serum proteomic analysis would aid in better understanding the pathophysiology of several diseases. The aim of this study was to identify the serum proteomes of dogs with anaplasmosis and Lyme disease using a pro-teomic approach. Diseases were diagnosed by a commercial rapid in-clinic ELISA. Borrelia antibodies were evaluated by IFAT. Four groups were designated: symptomatic dogs with anaplasmosis (n=5), dogs with Lyme disease (n=5), dual-positive dogs (n=5), and healthy control dogs (n=5). Serum samples were collected before treatment. Two-dimen-sional electrophoresis of pooled samples in each group were run in triplicate. Ten out of 57 differentially expressed spots between groups were evaluated for identification by mass spectrometry. Compared to those of controls, levels of vitamin D-binding protein (VDBP), glycoprotein-9 (GP9) and kininogen-1 (KGN-1) decreased, while haptoglobin (Hp) and immunoglobulin (Ig) heavy chain levels increased in dual infection group. Serum apolipoprotein-A1 (Apo-A1) levels decreased in dogs with anaplasmosis, Lyme disease and dual in-fections compared to those in control dogs. Serum clusterin levels decreased in dogs with anaplasmosis but were not differentially expressed in dogs with Lyme disease or dogs with dual infections compared to those in control dogs. Calpain-3 decreased in dogs with anaplasmosis and Lyme disease. This study showed that many protein levels might be changed in dogs with naturally acquired anaplasmosis and Lyme disease. Understanding the role of these proteins in different biological processes can provide information of interest for diagnostic and therapeutic approaches for these clinical conditions.