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Nat Med:用于特应性皮炎相关细菌疗法的开发及其临床研究

2021-02-24 xiaozeng MedSci原创

小儿湿疹,即特应性皮炎(atopic dermatitis,AD),又称为遗传过敏性皮炎,其是一种常见的疾病,在全球儿童中的患病率为15–20%,成人为1–3%。

小儿湿疹,即特应性皮炎(atopic dermatitis,AD),又称为遗传过敏性皮炎,其是一种常见的疾病,在全球儿童中的患病率为15–20%,成人为1–3%。AD通常与哮喘和过敏性疾病相关,且由于感染增加以及社会心理和生理生活质量下降而导致严重的发病率。

目前尚未找到AD的单一发病原因。相反的,AD的病理生理学涉及了包括宿主遗传学、皮肤屏障功能改变和免疫学异常在内的多种因素。AD经常以金黄色葡萄球菌的过度生长为特征,后者通过促进炎症来加剧疾病的进展。


在该研究中,研究人员主要分析了健康人皮肤中分离出的一种人葡萄球菌A9(ShA9)的安全性和作用机理,以探究AD的局部疗法。研究显示,ShA9能够杀死小鼠皮肤上的金黄色葡萄球菌,并抑制促炎的金黄色葡萄球菌毒素(psmα)的表达。

小鼠模型中ShA9活性的临床前验证

该研究报道了一项1期双盲随机试验(NCT03151148),该实验共招募了54位金黄色葡萄球菌阳性的AD成人患者,试验设计为在患者前臂皮肤上局部采用ShA9或对照溶剂一周,该实验达到了其主要安全性终点,且研究人员发现,接受ShA9的参与者中AD相关的不良事件更少。


在所有接受ShA9治疗的参与者中,湿疹的严重程度并无显著差异,但在观察至次要终点时,金黄色葡萄球菌明显减少,且ShA9 DNA增加。进一步的研究显示,参与者的一些金黄色葡萄球菌菌株并未被ShA9直接杀死,但psmα的mRNA表达在所有菌株中均受到了抑制。在ShA9直接杀死金黄色葡萄球菌的参与者的事后分析显示,局部湿疹的严重程度有所改善。

ShA9治疗的受试者皮肤上的细菌种类分析

总而言之,该研究结果显示,针对AD的最佳治疗方法应该是恢复表皮屏障缺陷且同时抑制炎症的进展。该临床试验也说明了细菌疗法对AD的安全性和潜在益处。


原始出处:

Nakatsuji, T., Hata, T.R., Tong, Y. et al. Development of a human skin commensal microbe for bacteriotherapy of atopic dermatitis and use in a phase 1 randomized clinical trial. Nat Med (22 February 2021).

 

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    2022-03-16 屋顶瞄爱赏月

    学习了

    0

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    2021-06-21 liye789132251
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