Neurokinin-1 receptor antagonism for the treatment of cough in lung cancer

消炎药 医学 肺癌 安慰剂 P物质 NK1受体拮抗剂 恶心 内科学 呕吐 胃肠病学 麻醉 昂丹司琼 临床终点 随机对照试验 止吐药 受体 病理 替代医学 神经肽
作者
Amélie Harle,F. Blackhall,Alex Molassiotis,Kimberley Holt,Rachel Dockry,Philip Russell,Katy Burns,Ryan Robinson,Mark A. Birrell,Maria G. Belvisi,Jennifer A. Smith
标识
DOI:10.1183/13993003.congress-2016.pa5060
摘要

Background: Effective cough treatments are a significant unmet need. Aprepitant blocks substance P at NK-1 receptors and is licensed for chemotherapy-induced nausea and vomiting. We assessed Aprepitant in vagal tissue and a proof of concept trial in lung cancer patients with cough. Methods: In vitro, isolated vagus nerve sections were placed in grease gap recording chambers and depolarization to test solutions measured. A randomised double-blind crossover trial enrolled lung cancer patients with cough who received aprepitant (125mg day 1, 80mg day 2&3) or matched placebo; following a 3 day wash out, patients crossed over. The primary endpoint was awake cough frequency (coughs/hr(c/h)) and patients reported cough severity and impact. Results: Substance P depolarised guinea pig (0.083mV±0.0066, n=5) and human vagus (0.0875mV, n=2). Aprepitant (10µM) reduced substance P depolarisation by 78% in guinea pig (0.0180mV±0.0080) and 94% in human vagus (0.0050 mV). Twenty lung cancer patients enrolled: mean age 66yrs(±7.69); 60% female; 70% ex, 25% current and 5% non-smokers; performance status 0=25%, 1=55% and 2=25%. 80% had non-small cell cancer, 50% advanced stage and 20% were on cancer therapy. Awake cough frequency improved with aprepitant [baseline 15.9c/h(95%CI 10.1-28.3), aprepitant 12.8(8.7-18.8), placebo 16.2(11.3-23.0), p=0.03]. Patients reported improved cough severity [VAS baseline 57.0mm (95% CI 47.4-67.2), aprepitant 40.8(34.3-47.3), placebo 49.8(44.2-55.4), p=0.008] and impact [Manchester Cough in Lung Cancer Scale, p<0.001]. Conclusions: This is the first study to show NK-1 antagonism has anti-tussive effects in lung cancer, with only 3 days treatment. Vagal inhibition may mediate this effect.

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