Yazar "Oren, Merve" seçeneğine göre listele
Listeleniyor 1 - 5 / 5
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Does Decompressive Duraplasty Have a Neuroprotective Effect on Spinal Trauma?: An Experimental Study(Elsevier Science Inc, 2019) Camlar, Mahmut; Turk, Caglar; Buhur, Aylin; Oltulu, Fatih; Oren, Merve; Senoglu, Mehmet; Ozer, FusunBACKGROUND: Spinal cord injury (SCI) may result in neuromotor, sensory, and autonomic function damages. Edema because of spinal cord trauma can reach serious dimensions. The aim of this study was to histologically evaluate the effects of duraplasty on neural tissues. METHODS: Twenty-eight Wistar rats were randomly divided into 4 experimental groups: group 1 received laminectomy without SCI (sham); group 2 received laminectomy and SCI with the weight drop method; group 3 received laminectomy, SCI, and duraplasty within the first 6-8 hours of SCI; and group 4 received laminectomy, SCI, and duraplasty after 24 hours of SCI. The neurologic functions of the rats were tested periodically. All animals were euthanized 28 days after the surgery. Histopathologic and immunohistochemical evaluations were performed, and Kruskal-Wallis tests were used for statistical comparison of data between the groups. RESULTS: There was no significant difference in the Tarlov examination scores from different time points between the groups. The number of neurons stained with nuclear factor kappa beta was higher in group 3 than groups 1 and 4. The number of neurons stained with terminal deoxynucleotidyl transferase dUTP nick-end labeling was higher in group 2 than group 3. CONCLUSIONS: Decompressive laminectomy is a procedure frequently used in spinal trauma surgery. However, it is often unclear whether the decompression is fully adequate. Our results will aid the development of further studies regarding the reliability of duraplasty in the treatment of SCI.Öğe How Safe is the Use of Intrathecal Fluorescein? An Experimental Study(2019) Çamlar, Mahmut; Türk, Çağlar; Oltulu, Fatih; Oren, Merve; Buhur, Aylin; Yiğittürk, Gürkan; Gazioğlu, NurperiAIM: To investigate the effects of fluorescein-sodium on neural tissues. MATERIAL and METHODS: Twenty-one Wistar rats were randomly divided into three experimental groups: control (group 1) and fluorescein-sodium groups with different doses (groups 2 and 3). in the control group, craniectomy following with durotomy was performed with the help of a loupe microscope, and a dry sponge was overlayed to the brain tissue. in the study groups, the open dura was covered with a sponge soaked with 0.02 mg (group 2) and with 0.2 mg (group 3) fluorescein sodium following craniectomy. Three weeks postoperatively, rats were sacrificed for the histopathologic evaluations. RESULTS: Fluorescein-induced apoptosis occurs in a dose-dependent manner in rats’ neurons. It was determined that neuron and neuroglial cell TUNEL staining was statistically different among the three groups (p<0.001). Our results indicated that fluorescein induces apoptosis, resulting in increased nuclear factor kappa beta (NF-??) expression in a dose-dependent manner. CONCLUSION: Fluorescein sodium is used frequently during surgery for CSF fistulas. However, information in the literature about its safety is insufficient. Our study holds promise for the development of new studies on the reliability of this agent.Öğe How Safe is the Use of Intrathecal Fluorescein? An Experimental Study(2019) Çamlar, Mahmut; Türk, Çağlar; Oltulu, Fatih; Oren, Merve; Buhur, Aylin; Yiğittürk, Gürkan; Gazioğlu, NurperiAIM: To investigate the effects of fluorescein-sodium on neural tissues. MATERIAL and METHODS: Twenty-one Wistar rats were randomly divided into three experimental groups: control (group 1) and fluorescein-sodium groups with different doses (groups 2 and 3). In the control group, craniectomy following with durotomy was performed with the help of a loupe microscope, and a dry sponge was overlayed to the brain tissue. In the study groups, the open dura was covered with a sponge soaked with 0.02 mg (group 2) and with 0.2 mg (group 3) fluorescein sodium following craniectomy. Three weeks postoperatively, rats were sacrificed for the histopathologic evaluations. RESULTS: Fluorescein-induced apoptosis occurs in a dose-dependent manner in rats’ neurons. It was determined that neuron and neuroglial cell TUNEL staining was statistically different among the three groups (p<0.001). Our results indicated that fluorescein induces apoptosis, resulting in increased nuclear factor kappa beta (NF-??) expression in a dose-dependent manner. CONCLUSION: Fluorescein sodium is used frequently during surgery for CSF fistulas. However, information in the literature about its safety is insufficient. Our study holds promise for the development of new studies on the reliability of this agent.Öğe How Safe is the Use of Intrathecal Fluorescein? An Experimental Study(Turkish Neurosurgical Soc, 2019) Camlar, Mahmut; Turk, Caglar; Oltulu, Fatih; Oren, Merve; Buhur, Aylin; Yigitturk, Gurkan; Ozer, Fusun; Gazioglu, NurperiAIM: To investigate the effects of fluorescein-sodium on neural tissues. MATERIAL and METHODS: Twenty-one Wistar rats were randomly divided into three experimental groups: control (group 1) and fluorescein-sodium groups with different doses (groups 2 and 3). In the control group, craniectomy following with durotomy was performed with the help of a loupe microscope, and a dry sponge was overlayed to the brain tissue. In the study groups, the open dura was covered with a sponge soaked with 0.02 mg (group 2) and with 0.2 mg (group 3) fluorescein sodium following craniectomy. Three weeks postoperatively, rats were sacrificed for the histopathologic evaluations. RESULTS: Fluorescein-induced apoptosis occurs in a dose-dependent manner in rats' neurons. It was determined that neuron and neuroglial cell TUNEL staining was statistically different among the three groups (p<0.001). Our results indicated that fluorescein induces apoptosis, resulting in increased nuclear factor kappa beta (NF-kappa beta) expression in a dose-dependent manner. CONCLUSION: Fluorescein sodium is used frequently during surgery for CSF fistulas. However, information in the literature about its safety is insufficient. Our study holds promise for the development of new studies on the reliability of this agent.Öğe How Safe Is the Use of Intrathecal Vancomycin?(Elsevier Science Inc, 2022) Demir, Abdulkadir; Camlar, Mahmut; Kuscu, Gokce Ceren; Gurel, Cevik; Oltulu, Fatih; Oren, Merve; Aldag, CeydaBACKGROUND: Central nervous system infection after neurosurgical procedures is a severe complication with high morbidity rates and sometimes mortality. Our experimental study aimed to investigate the biochemical and histopathologic effects of vancomycin on neural tissues when applied to the cisterna magna. METHODS: Wistar albino rats were randomly divided into 4 groups: Control (Group 1) and different vancomycin dose groups (Groups 2, 3, and 4). In Group 1, 0.1 mL cerebrospinal fluid was drained from the cisterna magna and 0.1 mL 0.9% NaCI (normal saline) was administered into the subarachnoid space. In the study groups, 0.1 mL cerebrospinal fluid was drained from the cisterna magna and 0.1 mg/200g rat per day (Group 2), 0.2 mg/200g rat per day (Group 3), and 0.4 mg/200g rat per day (Group 4) vancomycin were administered into the subarachnoid space for 7 days. All rats were sacrificed on the eighth day. Serum super-oxide dismutase and catalase levels were measured. Histopathologic and immunohistochemical analyses were conducted. RESULTS: The findings showed that the administration of 0.2 and 0.4 mg/kg doses had significant differences in superoxide dismutase and catalase activity compared with the controls (P < 0.05). These vancomycin doses also induced the apoptotic process, and the enzyme activity results correlated with immunohistochemical results. CONCLUSIONS: Dose-related neurotoxicity of intrathecal vancomycin was shown at the cellular level. The importance of dose regulation of intrathecal vancomycin has come into view. To our knowledge, this is the first study in the literature that has investigated the neurotoxic effects of vancomycin.
