生物材料移植治疗急性完全性脊髓损伤临床研究取得突破

2016-06-22 佚名 中科院遗传与发育生物学研究所 重大科技任

图1:戴建武(左二)在关注手术进程 图2:医务人员准备把神经再生胶原支架放入患者体中 脊髓损伤是一类严重的中枢神经系统损伤。脊髓损伤后由于损伤及继发的一系列病理生理反应,患者损伤平面以下的感觉及运动功能会丧失,导致截瘫,将严重影响生活质量,给家庭和社会造成沉重负担。迄今为止,脊髓损伤修复一直是世界性难题,尚无有效的治疗方法。 中国科学院遗传与发育生物学研究所戴建武

图1:戴建武(左二)在关注手术进程

图2:医务人员准备把神经再生胶原支架放入患者体中

脊髓损伤是一类严重的中枢神经系统损伤。脊髓损伤后由于损伤及继发的一系列病理生理反应,患者损伤平面以下的感觉及运动功能会丧失,导致截瘫,将严重影响生活质量,给家庭和社会造成沉重负担。迄今为止,脊髓损伤修复一直是世界性难题,尚无有效的治疗方法。

中国科学院遗传与发育生物学研究所戴建武再生医学研究团队长期从事脊髓损伤的再生修复研究。他们发现,脊髓损伤后内源性神经干细胞会响应损伤的刺激,迅速大量增殖并向损伤区域迁移,这些神经干细胞为急性脊髓损伤的再生修复提供了宝贵的细胞来源。然而,由于损伤部位已经形成了抑制神经再生的微环境,使得迁移来的神经干细胞主要向胶质细胞分化,而极少分化为神经元。针对上述问题,戴建武团队率先提出了以生物材料为基础构建适合脊髓再生的微环境,促进神经干细胞向神经元定向分化,引导神经再生的急性脊髓损伤再生修复的科学策略。

在中科院“干细胞与再生医学研究”战略性A类科技先导专项的支持下,戴建武团队设计和研发了基于胶原蛋白的神经再生支架,制订了神经再生胶原支架的产品标准并完成了型式检测。团队首创了大鼠和犬的大段脊髓全横断缺损损伤模型,并通过大量动物实验研究证实,功能神经再生胶原支架可有效引导神经干细胞定向分化为神经元,并能显著抑制瘢痕中神经再生抑制分子的产生,从而能够有效促进运动功能恢复。

2015年4月22日,戴建武团队在武警后勤学院附属医院(天津)开展了首例神经再生胶原支架治疗急性完全性脊髓损伤临床研究。首例急性脊髓损伤受试者腰部以下失去感觉运动功能,经过一年的康复,运动功能方面得到显著改善,受试者下肢肌力明显增强,髋关节的活动功能大幅度改善,并可在支具辅助下通过髋关节的活动行走。电生理检查表明,受试者感觉诱发电位和运动诱发电位均可跨过损伤平面进行传导,表明损伤部位已有神经连接。同时,受试者能够准确感知到小便,生活自理能力显著提高。2015年9月,团队又开展了一例颈段的急性完全性脊髓损伤临床研究。受试者经过近9个月的康复,目前上肢运动功能大幅度改善,生活自理能力显著提高。

临床研究证实,神经再生胶原支架可有效促进急性脊髓损伤患者的损伤修复,实现了我国在生物材料移植治疗急性完全性脊髓损伤临床研究中的重大突破。戴建武团队认为,由于急性脊髓损伤有大量内源神经干细胞迁移到损伤部位,另外受伤者外周神经系统及肌肉运动系统功能尚未受损,神经再生胶原支架的及时移植将可为受伤者提供宝贵的再生修复机会。他们计划近期加大急性脊髓损伤患者再生医学修复的临床研究规模,并开始设计急性部分性脊髓损伤患者的临床研究方案。

完全性脊髓损伤修复是一个世界性难题,其每一点进展都意义重大。戴建武团队表示无论脊髓损伤再生修复的临床研究之路多么漫长艰辛,他们都会继续探索创新,为满足我国脊髓损伤患者再生修复的重大需求而不断努力,为保持我国在脊髓损伤再生修复临床研究领域的领先地位而不懈奋斗。

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    2018-07-13 jyh_359549394

    突破进展在哪里?成功案例在哪里?

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    2016-09-02 doctorJiangchao

    继续关注

    0

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    2016-09-02 doctorJiangchao

    继续学习

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