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    Effectiveness of the biophysical barriers on the peridural fibrosis of a postlaminectomy rat model: An experimental research
    (Elsevier Sci Ltd, 2011) Kasimcan, Mustafa Omur; Bakar, Bulent; Aktas, Savas; Alhan, Aslihan; Yilmaz, Mustafa
    Purpose: Long term results after surgical treatment of disc herniation have shown that epidural and/or peridural fibrosis formed during the healing process after surgical intervention. We conducted this experimental study to evaluation of the effectiveness of the bioresorbable barriers (ADCON-L and Seprafilm (R) Adhesion Barrier) on formation of the peridural fibrosis in rat model performed laminectomy. Methods: Thirty-two male Wistar albino rats 250-350 g body weight were distributed into three groups (CONTROL, AL group received ADCON-L; SAB group received Seprafilm (R) Adhesion Barrier). A dorsal laminectomy at L3, L4, L5 was performed, and then except those of the CONTROL group, the experimental material was left on the dura mater. Six weeks later spinal column of all rats was totally removed between the T10 and L5 levels, and peridural fibrosis, and dural adhesions were evaluated histologically and graded. The results were compared statistically by using the chi-square (chi(2)) test. Also three random regions were examined, and the fibroblast cells were counted. The fibroblast count results were statistically analysed by using the One-Way ANOVA test. Results: The variation of histopathological grades was statistically significant regarding the comparison of the all groups obtained from the chi(2) test (chi(2) = 16.40; p = 0.003). However, the variation in the mean values of the fibroblast count result was not statistically significant obtained from the One-Way ANOVA test (F = 2.114; p > 0.05). Conclusion: Our study results suggest that Seprafilm (R) Adhesion Barrier and ADCON-L can be effective in reducing the prevalence of the postoperative peridural adhesions in rat laminectomy model. On the other hand, the fibroblast densities of the experimental groups were not different between groups. So, we could say that these materials can act as a foreign body in long term period in rat. (C) 2010 Elsevier Ltd. All rights reserved.
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    Effects of low-dose methotrexate in spinal cord injury in rats
    (Turkish Assoc Trauma Emergency Surgery, 2013) Bakar, Bulent; Kose, Emine Arzu; Kupana Ayva, Sebnem; Sarkarati, Bahram; Kasimcan, Mustafa Omur; Kilinc, Kamer
    BACKGROUND This study was designed to evaluate the possible protective effects of low-dose methotrexate in the spinal cord injury (SCI) in rats. METHODS Thirty-seven Wistar albino rats were used in the present study. Except for the animals of the Sham group, all animals were divided into two main groups, which were used in acute and subacute stage investigations. Then, thoracal laminectomy was performed, and except for the Sham group, SCI was induced using a temporary aneurysm clip. After clip compression, the experimental material (methotrexate or methylprednisolone) was administered intraperitoneally, except in the Sham and Control groups. Then, the spinal cords were removed to evaluate the SCI histopathologically and biochemically at the scheduled date. RESULTS Neither experimental material was shown to reduce the histopathological grade in either stage of SCI. Low-dose methotrexate was shown to decrease lipid peroxidation levels only in the subacute stage of SCI. However, methylprednisolone and low-dose methotrexate could not decrease or block myeloperoxidase enzyme activation in either stage of SCI. CONCLUSION Low-dose methotrexate was effective in reducing the lipid peroxidation levels in the subacute stage of SCI, although histopathological evaluation results and myeloperoxidase levels of all groups did not support this finding at either stage.
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    Methylene blue vital staining of nerve stumps in secondary peripheral nerve repair
    (Elsevier Sci Ltd, 2011) Yazici, Ilker; Kasimcan, Mustafa Omur; Karakaya, Esen Ibrahim; Gurel, Murat; Cavusoglu, Tarik
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