Circulation:人类诱导多能干细胞衍生的心脏细胞制作的大型心肌修补物能够改善猪心肌梗塞预后。

2017-12-17 hzangs “外泌体之家”微信号

在纤维蛋白支架中通过悬浮心肌细胞,平滑肌细胞和从人诱导多能干细胞分化的内皮细胞,产生临床相关维度(4cm×2cm×1.25mm)的人心脏肌肉片(hCMP) ,然后在动态(摇摆)平台上培养该构建体。

摘要:在纤维蛋白支架中通过悬浮心肌细胞,平滑肌细胞和从人诱导多能干细胞分化的内皮细胞,产生临床相关维度(4cm×2cm×1.25mm)的人心脏肌肉片(hCMP) ,然后在动态(摇摆)平台上培养该构建体。体外评估hCMPs表明成熟响应动态培养刺激。体内评估在心肌梗塞(MI)的猪模型中进行。动物组包括:用两种hCMP(MI + hCMP,N = 13)处理的MI心脏,用两种无细胞开放纤维蛋白斑块(MI + OP,n = 14)或者没有实验斑块(MI,n = 15) );第四组动物进行假手术(SHAM,n = 8)。通过磁共振成像评估心脏功能和梗塞面积,通过植入环记录仪评估心律失常发生率,并通过计算人Y染色体表达的定量PCR测量来评估植入率。另外的研究检查了心肌蛋白表达谱变化以及与来自细胞修补物的外泌体有关的可能的作用机制。结果显示HCMP在制造1天内开始同步跳动,经过7天的动态培养刺激后,体外评估显示出与电子机械耦合,钙处理和产生力的改进有关的机制。移植后4周植入率为10.9±1.8%。 hCMP移植可显着改善左心室(LV)功能,梗死面积,心肌壁应力,心肌肥厚,减少周围瘢痕边界区心肌细胞凋亡。 hCMP移植也逆转了肌节蛋白调节蛋白磷酸化中一些MI相关的变化。从hCMP释放的外泌体似乎具有改善心肌细胞存活的细胞保护性质。综合以上结果可知,我们制造了一种临床相关大小的hCMP,来自hiPSC的心脏细胞。动态培养7天后,hCMP体外成熟。这种类型的hCMP的移植导致梗塞面积的显着减小以及与LV壁应力降低相关的心脏功能的改善。 hCMP治疗与致心律失常性的显着变化无关。

PS:这是一篇研究型论文,论文研究了人诱导多能干细胞衍生的心肌细胞在前临床应用于猪心肌梗塞模型治疗中的作用。其中评价了部分外泌体可能的功能影响。

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    2017-12-19 muzishouyi
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    2017-12-17 有备才能无患

    在纤维蛋白支架中通过悬浮心肌细胞.平滑肌细胞和从人诱导多能干细胞分化的内皮细胞.产生临床相关维度(4cm×2cm×1.25mm)的人心脏肌肉片(hCMP).然后在动态(摇摆)平台上培养该构建体.

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    2017-12-17 天地飞扬

    心梗患者看到了希望

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