成功植入生物工程的内在神经支配的、人体内部肛门括约肌

2011-07-28 MedSci原创 MedSci原创

来源:医学论坛网        最近,美国学者Shreya Raghavan等,将生物工程制造的内在神经支配的人肛门内括约肌(IAS)成功植入小鼠,成为大便失禁患者的治疗选择之一。相关研究发表于《胃肠病学》(Gastroenterology)杂志上。     为了恢复排便的控制性,必须增强IAS减弱的压力

来源:医学论坛网

       最近,美国学者Shreya Raghavan等,将生物工程制造的内在神经支配的人肛门内括约肌(IAS)成功植入小鼠,成为大便失禁患者的治疗选择之一。相关研究发表于《胃肠病学》(Gastroenterology)杂志上。

    为了恢复排便的控制性,必须增强IAS减弱的压力。研究者们使用生物工程制造的内在神经支配的人IAS,在体外模拟括约肌的生理。

    研究人员将人IAS环形平滑肌,与永生化的小鼠胚胎肠道神经元共培养;并研究了生物工程制造的内在神经支配的人IAS,植入RAG1−/−小鼠、经历新生血管形成,以及保存构成肌原性和神经元组件的生理功能的能力。

    植入的IAS在体内经历了新生血管化;多数血管没有炎症或感染迹象。从植入的和植入前的IAS获得的实时压力表明,IAS生理具有各自的特点。这些特点包括自发的肌原性基本电位的形成;抑制性神经递质血管活性肠肽(VIP)反应性的基本电位100%的松弛和内在神经支配的直接电场刺激;一氧化氮性或VIP性的电场诱发松弛的抑制(通过对抗一氧化氮合成或受体相互作用);回应乙酰胆碱所引起的胆碱能刺激的收缩;完整的机电耦联(通过氯化钾直接反应证实)。植入的、内在神经支配的、生物工程的人IAS组织保存了肌原性的和神经元的组件的完整性和生理机能。

相关链接:Successful Implantation of Bioengineered, Intrinsically Innervated, Human Internal Anal Sphincter

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    2011-10-26 hxj0127
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    2011-07-30 jiyangfei