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基于微流控芯片技术建立缺血再灌注心肌损伤模型

Establishment of myocardial ischemia-reperfusion injury model based on microfluidic chip

  • 摘要: 基于微流控芯片技术建立体外大鼠缺血再灌注(I/R)心肌细胞损伤模型并验证其适用性,该模型为研究各种心血管药物以及新药快速、有效筛选提供基础。本实验采用软光刻技术和模塑法制作一种扇形微流控芯片,芯片中培养心肌细胞并进行细胞活力检测,通过缺血台氏液建立I/R损伤模型;利用瑞氏-吉姆萨染液检测模型中心肌细胞形态变化;通过ELISA试剂盒检测模型中损伤指标含量变化;最后采用心肌损伤治疗药物葛根素验证该I/R损伤模型的适用性。实验结果表明,芯片中心肌细胞活力接近98%以上;与空白组相比,I/R损伤模型中心肌细胞发生明显凋亡变化,损伤指标CK-MB、LDH蛋白分泌量显著增加;葛根素组与模型组比较,细胞凋亡形态缓解,CK-MB、LDH蛋白分泌量显著降低,I/R损伤模型的适用性良好。基于微流控芯片技术建立的体外大鼠I/R心肌细胞损伤模型成功,本研究为微流控芯片技术在心血管修复新药开发领域开拓一种新思路和新方法。

     

    Abstract: This study was aimed to establish the ischemia-reperfusion(I/R)myocardial cells injury model using microfluidic technology in vitro. This model was fast and efficient to be used for drug screening especially in the field of cardiovascular drug. In the present study, we firstly made a fan-shaped microfluidic chip using soft lithography technology and molding technology, then the myocardial cells were cultured in this chips. Then the cells were exposed to ischemic tyrode′s reagents to mimic the I/R injury followed by the cell viability analysis. The morphology and the content of damage index were analyzed by Wright-Giemsa dye and ELISA kit, respectively. Finally, puerarin was used to evaluate the efficiency of this model since Compared with the control group, the cell viability of myocardial cells cultured in this chip was up to 98% in the chip. Also, there was not significant diffe-rence of myocyte apoptosis and damage index′ content between cells cultured in normal condition and that cultured in chip. Furthermore, puerarin treatment ameliorated the myocyte apoptosis, and the content of damage index induced by the I/R injury. Therefore, we successfully established the injury model based on microfluidic technology in vitro, providing novel idea and method for drug screening in the field of cardiovascular repair by microfluidic technology.

     

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