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Am J Respir Crit Care Med:新的研究发现或可延长囊性纤维化患者的生存期

2016-05-14 MedSci MedSci原创

Am J Respir Crit Care Med:新的研究发现或可延长囊性纤维化患者的生存期近日,一项新的研究发现一种蛋白酶抑制剂(QUB-TL1)可阻断细胞中的离子通道从而显著减少气道炎症和感染的周期,研究人员表示,该分子或可延长肺囊肿性纤维化患者的生存期,该研究发现已在线发表于American Journal of Respiratory and Critical Care Medicine

近日,一项新的研究发现一种蛋白酶抑制剂(QUB-TL1)可阻断细胞中的离子通道从而显著减少气道炎症和感染的周期,研究人员表示,该分子或可延长肺囊肿性纤维化患者的生存期,该研究发现已在线发表于American Journal of Respiratory and Critical Care Medicine。

该研究小组来自于英国贝尔法斯特女王大学,他们解释了QUB-TL1如何阻止上皮钠通道ENaC的激活。

实验中发现,该分子具有改善气道水合作用的潜能,且可显著改善粘液的清除。

该研究的通讯作者Lorraine Martin,来自女王大学药学院,说道:“这或可以预防感染和炎症慢性循环所造成的严重肺损伤,并可改善患者的生活质量以及预期寿命。”

囊性纤维化(CF)是一种遗传性疾病,可损害内脏器官,尤其是肺和消化系统。据WHO统计显示,全球约100000人患有CF。

随着治疗方法的不断提高,CF成年患者的数量也在稳定增加。仅30年前,CF患者还无法活到成年。而现在,约一半的CF患者可度过30岁,有的甚至可存活到50多岁和60多岁。

QUB-TL1抑制了一些通道激活酶

机体遗传了一个缺陷基因(CFTR)的两次错误拷贝从而可发生CF。均携带CFTR的夫妻孕育的后代发生CF的几率为25%。

CFTR可破坏离子进出细胞的通道,从而导致粘液存留在组织表面上(如呼吸道和消化道内壁),使得组织表面脱水,变厚,便粘,且难以清除粘液。粘液可粘连细菌,引起慢性感染,炎症,肺部疤痕以及消化困难。

本研究中,研究人员测试了该分子在实验室培养的原代气道上皮细胞中的作用。结果发现,该分子可以抑制一些通道激活酶(包括前列腺蛋白,蛋白分解酵素,弗林蛋白酶),这些激活酶在CF气道上皮细胞表面活性异常高。抑制这些酶可降低钠通道的活性,从而改善机体的气道水合作用和粘液的清除。

作者认为,该研究发现或延缓或预防CFTR突变所致的CF患者肺部疾病的发展,从而延长患者的生存期。

原始出处:

James A Reihill et al., Inhibition of protease-ENaC signaling Improves mucociliary function in cystic fibrosis airways, American Journal of Respiratory and Critical Care Medicine, doi:10.1164/rccm.201511-2216OC, published online 25 March 2016.

Catharine Paddock. Cystic fibrosis: New molecule may prolong patient survival. MNT, 13 May 2016.

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    2016-10-03 wolongzxh
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    2016-09-18 1e10c84am36(暂无匿称)

    不错哦继续关注

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