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Wound Repair Regen:B淋巴细胞有潜力成为糖尿病足治疗手段

2017-11-01 佚名 “药明康德”微信号

糖尿病的并发症之一是下肢血管病变,引起足部溃疡和坏死,严重者需要截肢。糖尿病足溃疡是全球非创伤性截肢的最常见原因,也是护理成本最高的慢性伤口,因此,对廉价且安全的加速愈合方式的医疗需求巨大。近日,麻省总医院(MGH)的研究团队研发出了有潜力解决慢性伤口愈合的医疗方案,即用成熟的B淋巴细胞——也即产生抗体的免疫细胞——来在糖尿病和非糖尿病小鼠中加速急性和慢性伤口愈合。这种治疗也改善了再生组织的质量,

糖尿病的并发症之一是下肢血管病变,引起足部溃疡和坏死,严重者需要截肢。糖尿病足溃疡是全球非创伤性截肢的最常见原因,也是护理成本最高的慢性伤口,因此,对廉价且安全的加速愈合方式的医疗需求巨大。近日,麻省总医院(MGH)的研究团队研发出了有潜力解决慢性伤口愈合的医疗方案,即用成熟的B淋巴细胞——也即产生抗体的免疫细胞——来在糖尿病和非糖尿病小鼠中加速急性和慢性伤口愈合。这种治疗也改善了再生组织的质量,减少了瘢痕形成。该论文发表在《Wound Repair and Regeneration》上。

健康的伤口愈合有四个阶段:血液凝固以止血,炎症消除死亡细胞和受损细胞,新组织的增殖,以及组织重塑。人们认为,慢性伤口是卡在炎症期,导致低氧微环境以及分解组织蛋白质的酶的持续存在。之前来自MGH的研究发现B淋巴细胞能分泌强大的抗炎症分子,并且动物实验显示,将B淋巴细胞注入因心脏病受损的心脏组织能改善心脏的结构和功能恢复。

在这项新研究里,研究者从糖尿病和非糖尿病小鼠的脾脏中分离出成熟的B细胞。试验结果表明,施用一次浓缩的成熟B细胞即可加速伤口愈合,提高两种动物模型中组织修复的质量。用B细胞治疗也迅速减小了糖尿病小鼠的慢性皮肤溃疡的大小并改善愈合情况,增加了再生组织中神经末梢和血管的数量。这些实验动物对应的是55至60岁,身患不受控制的糖尿病的过度肥胖患者,他们是最难治疗的人群。这项研究有望给这类患者带来治疗新希望。

该论文的主要暨通讯作者Ruxandra Sirbulescu博士指出:“虽然还需要更多的研究来阐明B细胞在伤口愈合中发挥的有益功能的细胞分子机制,我们已经在申请相关的监管批准,准备进行糖尿病足溃疡患者的首次临床试验。如果有足够的资金,我们相信可以在一到两年内将这项技术应用到临床。”该团队正与论文合作者Dennis Orgill医学博士合作,在布莱根妇女医院(Brigham and Women's Hospital)整形外科部创伤护理中心设立糖尿病足溃疡患者的临床研究。

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    2017-11-03 gwc384
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    2017-11-01 三生有幸9135

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