Biomaterials:通过肝素功能化靶向递送干细胞显著增强急性肝衰竭的恢复

2019-04-27 不详 网络

急性肝功能衰竭(ALF)是由于肝脏中有毒物质的解毒不足,产生过量的活性氧(ROS)。间充质干细胞(MSC)疗法可以是通过抗炎活性和与组织再生相关的细胞因子分泌来治疗包括ALF在内的肝脏疾病的一种有前景的方法。然而,MSC治疗的功效通常很差,主要是由于施用细胞的存活率和植入率低。在这项研究中,我们证明了通过涂覆脂质缀合的肝素增强人脂肪来源的干细胞(hADSCs)向受损肝脏的递送可以导致小鼠模型中AL

急性肝功能衰竭(ALF)是由于肝脏中有毒物质的解毒不足,产生过量的活性氧(ROS)。间充质干细胞(MSC)疗法可以是通过抗炎活性和与组织再生相关的细胞因子分泌来治疗包括ALF在内的肝脏疾病的一种有前景的方法。然而,MSC治疗的功效通常很差,主要是由于施用细胞的存活率和植入率低。在这项研究中,我们证明了通过涂覆脂质缀合的肝素增强人脂肪来源的干细胞(hADSCs)向受损肝脏的递送可以导致小鼠模型中ALF的恢复显着改善。

首先,证实了hADSCs的分泌蛋白组对对乙酰氨基酚(APAP)诱导的肝细胞损伤的治疗作用,无论hADSCs是否有脂质缀合的肝素包被。然后,使用体内APAP诱导的ALF模型,与hADSCs本身(hADSC组)相比,分析脂质缀合的肝素包被的hADSCs(Lip-Hep / hADSC组)的治疗效果。静脉内给予hADSCs可降低天冬氨酸转氨酶(AST)和丙氨酸转氨酶(ALT)血清水平升高,但与hADSC组相比,Lip-Hep / hADSC组血清AST和ALT水平降低至正常值。通过使用标记细胞的分离器官的光学成像和针对人核的肝组织切片的免疫荧光染色,证实通过涂覆脂质缀合的肝素在肝脏损伤中增强的递送和更长的hADSCs保留。与hADSC组相比,通过Lip-Hep / hADSC组的免疫荧光染色检测到显着增加的人肝脏生长因子(hHGF)水平,来自hADSC的代表性分泌蛋白组,显着降低的巨噬细胞和CYP2E1水平,暗示减轻的炎症反应。这些结果与组织学分析中来自Lip-Hep / hADSC组的受损肝脏的恢复比hADSC组的恢复更好地一致。

因此,该研究结果表明,在hADSCs上涂覆脂质缀合的肝素具有改善细胞对肝损伤的治疗效果的巨大潜力。

原始出处:

Hwang Y, Kim JC, Tae G. Significantly enhanced recovery of acute liver failure by liver targeted delivery of stem cells via heparin functionalization. Biomaterials. 2019 Apr 17;209:67-78. doi: 10.1016/j.biomaterials.2019.04.019.

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    2020-02-18 sunylz
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