Báo cáo sinh học: Combination of cyclosporine and erythropoietin improves brain infarct size and neurological function in rats after ischemic stroke

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Combination of cyclosporine and erythropoietin improves brain infarct size and neurological function in rats after ischemic stroke
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Báo cáo sinh học: "Combination of cyclosporine and erythropoietin improves brain infarct size and neurological function in rats after ischemic stroke"Yuen et al. Journal of Translational Medicine 2011, 9:141http://www.translational-medicine.com/content/9/1/141 RESEARCH Open AccessCombination of cyclosporine and erythropoietinimproves brain infarct size and neurologicalfunction in rats after ischemic strokeChun-Man Yuen1, Cheuk-Kwan Sun2, Yu-Chun Lin3, Li-Teh Chang4, Ying-Hsien Kao3, Chia-Hung Yen5,Yung-Lung Chen6, Tzu-Hsien Tsai6, Sarah Chua6, Pei-Lin Shao7, Steve Leu8† and Hon-Kan Yip6,8*† Abstract Background: This study tested the superiority of combined cyclosporine A (CsA)-erythropoietin (EPO) therapy compared with either one in limiting brain infarction area (BIA) and preserving neurological function in rat after ischemic stroke (IS). Methods: Fifty adult-male SD rats were equally divided into sham control (group 1), IS plus intra-peritoneal physiological saline (at 0.5/24/48 h after IS) (group 2), IS plus CsA (20.0 mg/kg at 0.5/24h, intra-peritoneal) (group 3), IS plus EPO (5,000IU/kg at 0.5/24/48h, subcutaneous) (group 4), combined CsA and EPO (same route and dosage as groups 3 and 4) treatment (group 5) after occlusion of distal left internal carotid artery. Results: BIA on day 21 after acute IS was higher in group 2 than in other groups and lowest in group 5 (all p < 0.01). The sensorimotor functional test showed higher frequency of left turning in group 2 than in other groups and lowest in group 5 (all p < 0.05). mRNA and protein expressions of apoptotic markers and number of apoptotic nuclei on TUNEL were higher in group 2 than in other groups and lowest in group 1 and 5, whereas the anti- apoptotic markers exhibited an opposite trend (all p < 0.05). The expressions of inflammatory and oxidized protein were higher in group 2 than in other groups and lowest in group 1 and 5, whereas anti-inflammatory markers showed reversed changes in group 1 and other groups (all p < 0.05). The number of aquaporin-4+ and glial fibrillary acid protein+ stained cells were higher in group 2 as compared to other groups and lowest in groups 1 and 5 (all p < 0.01). Conclusion: combined treatment with CsA and EPO was superior to either one alone in protecting rat brain from ischemic damage after IS.Background social economic burden worldwide. Although growing data indicate that the newly developed thrombolyticDespite current advances in medicine and implementa- therapy offers a promising treatment option for sometion of the state-of-the-art management guidelines, patients with acute IS early after the onset of symptomsischemic stroke (IS) remains the leading cause of death [6,7], its clinical application is impeded by major limita-in the industrial countries regardless of etiologies [1-4]. tions [7-10]. Besides, thrombolytic therapy has beenIndeed, this unsavory clinical problem has vexed neurol- reported to be associated with a relatively high incidenceogists for decades. Not only the death but also the high of intracranial hemorrhage [10,11] contributing to itsincidence of severe neurological impairment after IS notable mortality and morbidity. Accordingly, the treat-with permanent disability [5] that cause a tremendous ment of acute IS patients remains problematic. There- fore, finding a safe and effective therapeutic regimen for* Correspondence: han.gung@msa.hinet.net† Contributed equally patients following acute IS, especially for those unsuita-6 Division of cardiology, Department of Internal Medicine, Kaohsiung Chang ble for thrombolytic therapy, is of utmost importanceGung Memorial Hospital and Chang Gung University College of Medicine, for physicians.Kaohsiung, TaiwanFull list of author information is available at the end of the article © 2011 Yuen et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.Yuen et al. Journal of Translational Medicine 2011, 9:141 Page 2 of 14http://www.translational-medicine.com/content/9/1/141 supplying area. The nylon filament was removed three N ot only has erythropoietin (EPO) therapy been hours after occlusion, followed by closure of ...