Person: SALMAN, BERNA
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Publication Anti-apoptotic and anti-oxidant effects of systemic uridine treatment in an experimental model of sciatic nerve injury(Türk Nöroloji Derneği, 2021-01-01) Khezri, Marzieh Karimi; Turkkan, Alper; Khezri, Marzieh Karimi; Koç, Cansu; KOÇ, CANSU; Salman, Berna; SALMAN, BERNA; Levent, Pinar; Cakir, Aysen; Kafa, Ilker Mustafa; Cansev, Mehmet; Bekar, Ahmet; ÇAKIR, AYŞEN; KAFA, İLKER MUSTAFA; CANSEV, MEHMET; BEKAR, AHMET; Tıp Fakültesi; Fizyoloji Ana Bilim Dalı; 0000-0002-6097-5585; 0000-0001-8309-0934; 0000-0003-2918-5064; AAA-4754-2022; ABX-9081-2022; A-6819-2018AIM: To investigate the anti-apoptotic and anti-oxidant effects of systemic uridine treatment in a rat model of sciatic nerve injury.MATERIAL and METHODS: Thirty-two adult male rats were equally randomized to Sham, Control, U100, and U500 groups. Sham rats received a sham operation by exposing the right sciatic nerve without transection, while those in the Control, U100, and U500 groups underwent right sciatic nerve transection followed by immediate primary anostomosis. Sham and Control groups received saline (0.9% NaCl) injections intraperitoneally (i.p.), while U100 and U500 groups received 100 mg/kg and 500 mg/kg uridine injections (i.p.), respectively, once a day for 7 days after the surgery. Rats in all the groups were sacrificed on the eighth day; sciatic nerve samples were analyzed for apoptosis by Western Blotting and for oxidation parameters including myeloperoxidase (MPO), malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase (GPx) and catalase (CAT) by Enzyme-Linked Immunosorbent Assay (ELISA).RESULTS: Uridine treatment at the dose of 500 mg/kg significantly decreased as apoptosis determined by Caspase-3/Actin ratio and exhibited significant anti-oxidant effects as determined by decreased levels of MPO and MDA as well as increased levels of SOD, GPx, and CAT compared to controls. Uridine at 100 mg/kg was only found to decrease the Caspase-3/Actin ratio, although it significantly decreased MDA and increased CAT levels compared to controls.CONCLUSION: Treatment with uridine reduces apoptosis and oxidation in a rat model of sciatic nerve injury dose-dependently. Thus, uridine may be beneficial in peripheral nerve regeneration by exhibiting anti-apoptotic and anti-oxidant effects.Publication Uridine treatment improves nerve regeneration and functional recovery in a rat model of sciatic nerve injury(Turkish Neurosurgical Soc, 2022-01-01) Khezri, Marzieh Karimi; Türkkan, Alper; KOÇ, CANSU; Salman, Berna; SALMAN, BERNA; Levent, Pınar; Çakır, Aysen; ÇAKIR, AYŞEN; CANSEV, MEHMET; KAFA, İLKER MUSTAFA; Bekar, Ahmet; BEKAR, AHMET; Tıp Fakültesi; Farmaoloji Ana Bilim Dalı; 0000-0002-6097-5585; 0000-0001-8309-0934; 0000-0003-2918-5064; A-6819-2018; ABX-9081-2022AIM: To investigate the regenerative potential and long-term functional effects of uridine treatment in a rat model of sciatic nerve injury.MATERIAL and METHODS: Male Sprague-Dawley rats were randomized to receive sham surgery plus saline (Sham group), right sciatic nerve transection and primary repair plus saline (Control group), right sciatic nerve transection, and primary repair plus 500 mg/kg uridine (Uridine group). Saline or uridine was injected intraperitoneally (i.p.) for seven days, and the rats were monitored for 12 weeks after surgery. We evaluated electrophysiological and functional recovery using electromyography (EMG) and sciatic functional index (SFI) at six and 12 weeks, respectively. At 12 weeks, rats were decapitated and their right sciatic nerves were examined in macroscopic and histomorphologic manners.RESULTS: Functional evaluation by SFI and sciatic nerve conduction velocity analyzed by EMG both decreased in the Control group but recovered in the Uridine group 12 weeks after surgery. Additionally, upon experiment completion, Uridine treatment was observed to enhance nerve adherence, separability scores, and the number of myelinated axons.CONCLUSION: These results reveal that short-term Uridine treatment provides morphological and electrophysiological benefits, which are represented by long-term functional improvement in a rat model of sciatic nerve injury. These findings validate and extend our knowledge on Uridine's regenerative effects in peripheral nerve injuries.Publication Preventive effects of antenatal CDP-choline in a rat model of neonatal hyperoxia-induced lung injury(Canadian Science Publishing, 2022-12-16) Koç, Cansu; Çakır, Ayşen; Salman, Berna; Öcalan, Büşra; Alkan, Tülin; Kafa, Ilker Mustafa; Çetinkaya, Merih; Cansev, Mehmet; KOÇ, CANSU; ÇAKIR, AYŞEN; SALMAN, BERNA; Öcalan, Büşra; ALKAN, TÜLİN; KAFA, İLKER MUSTAFA; CANSEV, MEHMET; Tıp Fakültesi; Fizyoloji Ana Bilim Dalı; 0000-0001-8309-0934; 0000-0002-6097-5585; A-6819-2018; N-9927-2019; AAH-1792-2021; LGY-8580-2024; M-9071-2019; AAG-7125-2021; DQU-6929-2022Antenatal steroid administration to pregnant women at risk of prematurity provides pulmonary maturation in infants, while it has limited effects on incidence of bronchopulmonary dysplasia (BPD), the clinical expression of hyperoxia-induced lung injury (HILI). Cytidine-5'-diphosphate choline (CDP-choline) was shown to alleviate HILI when administered to newborn rats. Therefore, we investigated effects of maternal administration of CDP-choline, alone or in combination with betamethasone, on lung maturation in neonatal rats subjected to HILI immediately after birth. Pregnant rats were randomly assigned to one of the four treatments: saline (1 mL/kg), CDP-choline (300 mg/kg), betamethasone (0.4 mg/kg), or CDP-choline plus betamethasone (combination therapy). From postnatal day 1 to 11, pups born to mothers in the same treatment group were pooled and randomly assigned to either normoxia or hyperoxia group. Biochemical an d histopathological effects of CDP-choline on neonatal lung tissue were evaluated. Antenatal CDP-choline treatment increased levels of phosphatidylcholine and total lung phospholipids, decreased apoptosis, and improved alveolarization. The outcomes were further improved with combination therapy compared to the administration of CDP-choline or betamethasone alone. These results demonstrate that antenatal CDP-choline treatment provides benefit in experimental HILI either alone or more intensively when administered along with a steroid, suggesting a possible utility for CDP-choline against BPD.