CCR | 儿童复发难治横纹肌肉瘤创新疗法:瑞戈非尼联合长春新碱和伊立替康
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*本文由深圳市拾玉儿童公益基金会“儿童肿瘤前沿”团队编译或约稿,文中图表均源引自文献原文。本文著作权归文章作者所有,欢迎个人转发分享,未经允许禁止转载,作者拥有所有法定权利,违者必究。如需转载,请留言或联系[email protected]。本文旨在分享儿童肿瘤科研前沿成果,不是治疗方案推荐。如需获得疾病治疗方案指导,请前往正规医院就诊。
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原文摘要(Abstract)
Purpose: This phase Ib study defined the safety, maximum tolerated dose (MTD), and recommended phase II dose (RP2D) of regorafenib combined with vincristine and irinotecan (VI). Secondary objectives were evaluation of antitumor activity and pharmacokinetics (PK) of regorafenib and irinotecan.
Patients and methods: Patients aged 6 months to <18 years with relapsed/refractory solid malignancies (≥50% with rhabdomyosarcoma [RMS]) received regorafenib (starting dose 72 mg/m2/day) concomitantly or sequentially with vincristine 1.5 mg/m2 on days 1 and 8 and irinotecan 50 mg/m2 on days 1-5 (21-day cycle). Adverse events (AEs) and tumor response were assessed. PK (regorafenib and irinotecan) were evaluated using a population PK model.
Results: We enrolled 21 patients (median age 10 years; 12 RMS; five Ewing sarcoma [EWS]). The MTD/RP2D of regorafenib in the sequential schedule was 82 mg/m2. The concomitant dosing schedule was discontinued because of dose-limiting toxicities in 2/2 patients treated. Most common grade 3/4 (>30% of patients) AEs were neutropenia, anemia, thrombocytopenia, and leukopenia. The overall response rate was 48% and disease control rate (complete response/partial response/stable disease/non-CR/non-PD) was 86%. Median progression-free survival was 7.0 months (95% CI, 2.9 to 14.8) and median overall survival was 8.7 months (95% CI, 5.5 to 16.3). When combined with VI, regorafenib PK were comparable to single-agent PK in children and adults (treated with regorafenib 160 mg/day).
Conclusions: Regorafenib can be combined sequentially with standard dose VI in pediatric patients with relapsed/refractory solid tumors with appropriate dose modifications. Clinical activity was observed in patients with RMS and EWS (clinicaltrials.gov NCT02085148).
DOI: 10.1158/1078-0432.CCR-23-0257