Oakland University William Beaumont School of Medicine, Rochester, Michigan.
Department of Medicine, The University of Chicago Medicine, Chicago, Illinois.
Head Neck. 2019 Nov;41(11):3842-3849. doi: 10.1002/hed.25910. Epub 2019 Sep 4.
This study assessed the maximum tolerated dose (MTD) of the PI3K inhibitor buparlisib given concurrently with cetuximab in recurrent and metastatic (R/M) head and neck squamous cell carcinoma (HNSCC).
Twelve patients with R/M HNSCC were enrolled. Patients were given oral buparlisib starting day 7 and daily thereafter. The dose of buparlisib was escalated in a 3 + 3 design followed by a dose expansion cohort of 6 patients. The MTD of buparlisib per protocol was 100 mg daily with cetuximab given intravenously every 14 days starting day 0.
Ten patients had ≥2 previous treatment regimens (11 with prior cetuximab). There were no dose limiting toxicities observed during dose escalation. One patient achieved a partial response and 4 achieved stable disease.
Based on this pilot study, buparlisib at 100 mg daily plus cetuximab proved to be well-tolerated. Patients previously treated with cetuximab monotherapy showed benefit from this combination.
本研究评估了在复发性和转移性(R/M)头颈部鳞状细胞癌(HNSCC)患者中,与西妥昔单抗联合应用时,PI3K 抑制剂 Buparlisib 的最大耐受剂量(MTD)。
共纳入 12 例 R/M HNSCC 患者。患者从第 7 天开始口服 Buparlisib,每天一次。Buparlisib 剂量采用 3+3 设计递增,随后进行了 6 例患者的扩展队列研究。方案规定的 Buparlisib 的 MTD 为每日 100mg,西妥昔单抗于第 0 天开始每 14 天静脉滴注一次。
10 例患者有≥2 种既往治疗方案(11 例有既往西妥昔单抗治疗)。在剂量递增期间未观察到剂量限制毒性。1 例患者部分缓解,4 例患者疾病稳定。
基于这项初步研究,每日 100mg 的 Buparlisib 联合西妥昔单抗显示出良好的耐受性。既往接受西妥昔单抗单药治疗的患者从该联合治疗中获益。