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    The effects of different intraabdominal pressure protocols in laparoscopic procedures on oxidative stress markers and morphology in rat ovaries
    (Wroclaw University of Medicine, 2014) Biler A.; Yucebilgin S.; Sendag F.; Akman L.; Akdemir A.; Ates U.; Uyanikgil Y.; Yilmaz-Dilsiz O.; Sezer E.
    Background: To determine the effects of different intraabdominal pressure (IAP) on the ovaries in a laparoscopic rat model. Objectives: The aim of the study was to determine the effects on the ovaries of different intraabdominal pressures (IAP) in laparoscopic surgery in a rat model. Material and Methods: Thirty-two post-pubertal nonpregnant Sprague-Dawley rats were divided randomly into four groups. In the control group, no intraabdominal pressure (IAP) was applied. In Group Pp10 and Group Ppl5, an IAP of 10 and 15 mm Hg, respectively, were applied by carbon dioxide insufflation for 60 min, and a 30-min desufflation was carried out. In Group IPp15, a 15 mm Hg IAP was applied for 10 min, and then CO2 was desufflated for 10 min. After this ischemic preconditioning, IAP was established at 15 mm Hg for 60 min, after which CO2 was desufflated for 30 min. Erythrocyte and ovarian tissue malondialdehyde (MDA) and histopathologic damage scores were evaluated. Results: In Groups Pp10 and Ppl5, ovarian tissue MDA values were significantly increased compared to the control group. In Groups Pp10 and Pp15, erythrocyte MDA values were significantly increased when compared to Group IPp15 and the control group. Ovarian histopatological assesment scores were significantly higher in Group Ppl5 than in Groups Pp10 and IPp15. Conclusions: Pneumoperitoneum causes injuries to abdominal organ such as the ovaries. The ischemic preconditioning method is more effective in reducing oxidative stress due to laparoscopic pneumoperitoneum than lowpressure pneumoperitoneum methods.
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    Effects of metoclopramide and ranitidine on survival of flat template McFarlane skin flaps in a rat wound healing model
    (2014) Yilmaz Dilsiz O.; Akhundzada I.; Bilkay U.; Uyanikgil Y.; Teymur H.; Ates U.; Baka M.
    Wound healing re-provides the morphological integrity after trauma. We investigated the effects of Metoclopramide and Ranitidine on survival of flat template McFarlane skin flaps in an experimental wound healing model. Rats (n:32) were randomly allocated in following groups: Flap control (Control), Metoclopramide(MET), Ranitidine(RAN) and Metoclopramide+Ranitidine (MET+RAN). After flap elevation, ip 10 mg/kg Ranitidin or 5 mg/kg Metoclopramide or the combination of both drugs were administered for 3 days. Next analgesia was maintained. No additional drugs were used for controls. On 10th day, whole cut skin flaps were excised, fixed in buffered formaldehyde and processed with histological techniques. Paraffine sections were stained with Hematoxylen-Eosin, Mallory-Azan and immunohistochemically with Desmin and Fibronectin and then evaluated with light microscopy. Experimental groups showed differences for epidermal degeneration, edema, hypertrophy of the hair follicles, neutrophil infiltration and areolar degeneration. Metoclopramide or Ranitidine administration positively impacts wound healing. This unique study emphasizes the importance of considering Metoclopramide or Ranitidine for possible adverse effects on flap survival in surgical clinics, therefore the combination of both drugs is not more effective. © Georg Thieme Verlag KG Stuttgart, New York.
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    The Protective Effect of Losartan on Diabetic Neuropathy in a Diabetic Rat Model
    (Georg Thieme Verlag, 2015) Cavusoglu T.; Karadeniz T.; Cagiltay E.; Karadeniz M.; Yigitturk G.; Acikgoz E.; Uyanikgil Y.; Ates U.; Tuglu M.I.; Erbas O.
    Aim: Involvement of the peripheral and autonomic nervous systems is possibly the most frequent complication of diabetes. Important risk factors included hyperglycemia, dyslipidemia, hypertension, and smoking. Angiotensin-converting-enzyme inhibitor (ACE) inhibitors should be beneficial in all vascular beds, including neuropathy and retinopathy. In this study we aimed to evaluate the effect of the angiotensin receptor blocker losartan on diabetic neuropathy in a diabetic rat model. Material and Methods: 24 male, Sprague Dawley albino mature rats were divided into 3 groups; (1) control group: No drug was administered to the remainder of rats which blood glucose levels were under 120mg/dl, (2) diabetic control: rats were given no medication, but 4ml per day of tap water was given by oral gavage, (3) losartan groups: rats were given 10mg/kg/day oral of losartan for 4 weeks. Electromyography (EMG) was applied to anesthetized rats at the end of 4th weekend. Then, the animals were euthanized and sciatic nerve was performed for histopathological examination. Results: Compound Muscle Action Potential (CMAP) amplitude of diabetic rats receiving the Saline in the EMG was significantly reduced when compared to the control group. Distal latency value and CMAP duration of diabetic rats receiving the saline were meaningfully increased when compared to the control group. CMAP amplitude and CMAP duration of diabetic rats receiving the Losartan treatment in the EMG were meaningfully reduced when compared to diabetic rats receiving the Saline. Perineural thickness in the rats receiving the Losartan treatment was found to be significantly reduced when compared to the group receiving the Saline. Conclusions: As a result, it has been shown in this study that perineural thickness of the Losartan treatment was significantly reduced when compared to saline receiving group, significantly increased the immunoexpression of NGF, and also provided a significantly recovery in EMG when compared to Saline receiving group. © J. A. Barth Verlag in Georg Thieme Verlag KG Stuttgart, New York.
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    Toxic effects of anatoxin-a on testes and sperm counts of male mice
    (2008) Yavasoglu A.; Karaaslan M.A.; Uyanikgil Y.; Sayim F.; Ates U.; Yavasoglu N.U.K.
    Anatoxin-a, a potent neurotoxin, is one of a number of toxins produced by cyanobacteria especially some strains of Anabaena. Toxic cyanobacteria are found worldwide in inland and coastal water environments. The present study was performed to evaluate the toxicity of anatoxin-a on testes and sperm counts of male mice. The animals of the treatment groups were administered with 50, 100 and 150 µg/kg/day anatoxin-a for seven consecutive days by intraperitoneal (i.p.) route. Although there were no significant changes in body weight gain, and absolute and relative testes weights, absolute and relative weights of cauda epididymis reduced significantly in the 100 and 150 µg/kg groups when compared with control group. The number of sperm count in cauda epididymis was reduced dose dependently in all treatment groups compared with control animals. Anatoxin-a caused dose-dependent histopathological changes in the testes of mice such as degenerations in seminiferous tubules, intercellular disassociation of spermatogenetic cell lines, sloughing of germ cells into tubular lumen, vacuolisation in Sertoli cells and loss of germ cells. The epithelial thickness of seminiferous tubules decreased significantly in all treatment groups in a dose-dependent manner. © 2008 Elsevier GmbH. All rights reserved.