CRTH2拮抗剂对鼻病毒感染引起哮喘急性加重的影响

2021-11-10 小文子 MedSci原创

timapiprant是否能降低或预防实验性鼻病毒(RV)诱导的哮喘急性加重?

一项2期研究表明,CRTH2拮抗剂替玛匹仑(timapiprant)可改善肺功能和哮喘控制,并减少哮喘急性加重。发表在Thorax杂志的一项研究评估timapiprant是否能降低或预防实验性鼻病毒(RV)诱导的哮喘急性加重。

采用随机双盲对照研究,将接受维持吸入糖皮质激素治疗的哮喘部分控制患者随机分配至timapiprant组(n = 22)和安慰剂组(n = 22),3周后接受RV-A16激发。主要终点是感染后14天内的累积下呼吸道症状评分。RV-A16感染前和感染期间评估上呼吸道症状、肺活量测定、气道高反应性、呼出气一氧化氮、RV-A16病毒载量和上下气道中的可溶性介质,以及支气管活检中的CRTH2染色。

6例受试者退出研究,8例未出现RV感染;对16例接受timapiprant治疗和14例接受安慰剂治疗的成功感染受试者的结局进行评估。

受试者在RV感染期间上下呼吸道症状显著增加。与基线相比,感染期间肺功能降低,仅timapiprant组的最大呼气流量(PEF)显著下降。感染后14天的中位累积下呼吸道症状得分,timapiprant组为21.0(IQR 13.3~46.5),安慰剂组为18.0(9.8~51.5),差值为3.0(95%CI, −29.0~17.0;p=0.78)。治疗组与安慰剂组之间的临床恶化严重程度无差异,包括每个时间点单独评估的上呼吸道症状、肺功能或气道高反应性,或曲线下累积面积(AUC)值。

在支气管活检样本中,安慰剂组在RV感染期间CRTH2+细胞被募集,而timapiprant治疗的受试者中不存在这种情况,差异为5%,尽管组间差异不显著,但2型炎症和对病毒感染的促炎反应在很大程度上不受timapiprant的影响Timapiprant具有良好的安全性,Timapiprant组和安慰剂组的不良事件发生率相似,无死亡、严重不良事件或药物相关停药。

结果表明,CRTH2拮抗剂Timapiprant不能减轻哮喘部分控制的ICS治疗组受试者RV诱导的症状和哮喘病理过程。正在进行的Timapiprant治疗哮喘的3期临床试验的结果值得关注。

原文出处:

Hugo Farne, Nicholas Glanville, et al, Effect of CRTH2 antagonism on the response to experimental rhinovirus infection in asthma: a pilot randomised controlled trial, Thorax, 2021, http://dx.doi.org/10.1136/thoraxjnl-2021-217429.

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