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The ischemic rat heart releases S100B

机译:缺血大鼠心脏释放S100B

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S100B is an astrocytic protein assessed in cerebrospinal fluid and serum as a biochemical marker of cerebral injuries. However, increasing evidences suggest the influence of extra cerebral sources on its serum levels. Since it was reported that the injured myocardiurn expresses S 10013, we investigated whether the isolated heart releases this protein. The rat hearts were excised and perfused by the Langendorff technique of isolated heart perfusion. After stabilization, 10 hearts (ischemic group) were submitted to 20 minutes of ischemia and 30 minutes of reperfusion, and 5 hearts (control group) were submitted to 50 minutes of perfusion. The perfusion fluid was collected at preischemia, and 0, 5, 10, 15 and 30 min after ischemia (or equivalent in controls) for S100B and cardiac troponin T (a heart injury marker) assays. In the ischemic group, S 10013 and troponin T levels increased significantly at time 0 min: S100B values [mu g/L, median (IQ25/IQ75)] increased from <= 0.02 (<= 0.02/0.03) to 0.38 (0.22/0.84), while troponin T values [mu g/L, median (IQ25/IQ75)] increased from 0.31 (0.15/0.45) to 2.84 (2.00/3.63). Our results point to the ischemic heart as an extra cerebral source of S100B. (c) 2005 Elsevier Inc. All rights reserved.
机译:S100B是一种在脑脊液和血清中评估的星形细胞蛋白,是脑损伤的生化指标。但是,越来越多的证据表明额外的大脑来源对其血清水平的影响。由于有报道说受伤的心肌表达S 10013,因此我们研究了离体心脏是否释放该蛋白。通过离体心脏灌注的Langendorff技术切除并灌注大鼠心脏。稳定后,将10个心脏(缺血组)进行20分钟缺血再灌注30分钟,将5个心脏(对照组)进行50分钟灌注。在缺血前和缺血后0、5、10、15和30分钟(或对照中的等效值)收集灌注液,以进行S100B和心肌肌钙蛋白T(心脏损伤标记物)检测。在缺血组中,S 10013和肌钙蛋白T水平在0分钟时显着增加:S100B值[μg / L,中位数(IQ25 / IQ75)]从<= 0.02(<= 0.02 / 0.03)增加到0.38(0.22 / 0.84),而肌钙蛋白T值[μg / L,中位数(IQ25 / IQ75)]从0.31(0.15 / 0.45)增加到2.84(2.00 / 3.63)。我们的研究结果表明缺血性心脏是S100B的额外大脑来源。 (c)2005 Elsevier Inc.保留所有权利。

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