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MA 17 - Locally Advanced NSCLC (ID 671)
- Event: WCLC 2017
- Type: Mini Oral
- Track: Locally Advanced NSCLC
- Presentations: 1
- Moderators:S. Jheon, Georgios Stamatis
- Coordinates: 10/17/2017, 15:45 - 17:30, F203 + F204 (Annex Hall)
MA 17.07 - Veliparib in Combination with Paclitaxel/Carboplatin (P/C)-Based Chemoradiotherapy (CRT) in Patients with Stage III NSCLC (ID 10210)
15:45 - 17:30 | Author(s): W. Petty
CRT is a standard for patients with Stage III non-small cell lung cancer (NSCLC). Veliparib (V) is a potent, orally bioavailable PARP1/2 inhibitor that can delay DNA repair following chemotherapy or radiation induced damage. A phase 2 study indicated favorable efficacy of V vs placebo when added to P/C in advanced NSCLC (Ramalingam et al. Clin Cancer Res. 2016). Based on these results, a phase 1/2 trial was initiated to study the safety and efficacy of V/P/C-based CRT in the treatment of Stage III NSCLC.
Patients without prior NSCLC therapy suitable for definitive CRT received V plus C AUC 2 + P 45 mg/m weekly + 60 Gy over 6-9 weeks. V was escalated from 60 mg BID to a maximum planned dose based on prior studies of 240 mg BID via 3+3 design with over-enrollment allowed followed by consolidation therapy of V 120 mg BID + C AUC 6 + P 200 mg/m for up to two 21-day cycles.
Thirty-nine patients (median age 66; 14 male) have been enrolled to date into dosing cohorts at 60 mg (7), 80 mg (9), 120 mg (7), 200 mg (8), and a maximum planned dose of 240 mg (8). Median tumor volume at screening was 81 cc (16-555 cc). PK of V was dose proportional. CRT or V required dose reduction for 0 or 1 patient, respectively. Four (10%) patients discontinued study during CRT. No DLTs were observed and an MTD has not been identified. The most common any-grade AEs were esophagitis (23), nausea (22), fatigue (20), neutropenia (19), and thrombocytopenia (19). 27 SAEs occurred including 12 SAEs with reasonable attribution to V but outside the DLT window including G3/4 febrile neutropenia (2), G3 dehydration (1), G3 vomiting (1), G3 esophagitis (1), G3 radiation esophagitis (1), G3 esophageal stricture (1), G3 intractable N/V (1), G3 aspiration pneumonia (1), G3 radiation pneumonitis (1), G4 sepsis (1), and G5 sepsis during consolidation (1). Of 29 patients evaluable for tumor assessment, best response was CR (2), PR (22), SD (3), and PD (2).
V/P/C-based CRT followed by V/P/C consolidation therapy is a tolerable regimen for the treatment of Stage III NSCLC. The RPTD for V during CRT is 240mg BID. A randomized placebo-controlled phase 2 extension of this study is planned. Clinical trial information: NCT02412371
P1.01 - Advanced NSCLC (ID 757)
- Event: WCLC 2017
- Type: Poster Session with Presenters Present
- Track: Advanced NSCLC
- Presentations: 1
- Coordinates: 10/16/2017, 09:30 - 16:00, Exhibit Hall (Hall B + C)
P1.01-059 - Combination Pembrolizumab and Low Dose Weekly Carboplatin/Paclitaxel for Patients with Recurrent/Metastatic NSCLC and PS of 2 (ID 9169)
09:30 - 16:00 | Author(s): W. Petty
Chemotherapy and immunotherapy have been shown to be beneficial for patients with non-small cell lung cancer (NSCLC) and performance status (PS) of 0 or 1; there still is debate, however, regarding its efficacy for patients with a PS of 2 which comprises approximately 30% of the NSCLC population. Pre-clinical data have demonstrated that low dose carboplatin/paclitaxel have resulted in superior immune efficacy compared to the maximum tolerated dose regimen. Given the significant unmet need for treatment options in this patient population, our study evaluated low-dose weekly carboplatin/paclitaxel combined with pembrolizumab in patients with NSCLC and a PS of 2.
Patients with metastatic or recurrent NSCLC and PS of 2 were randomized to single agent pembrolizumab at 200mg every 3 weeks or pembrolizumab plus weekly carboplatin AUC 1 and paclitaxel 25 mg/m irrespective to PDL-1 status. Response was determined using immune-related RECIST, and toxicity was graded using CTCAE 4.0.
Between 6/2016 and 2/2017, 20 patients were enrolled, and 19 patients were evaluable for response. The median age was 69 years (54-83). All 19 patients (100%) had a PS of 2. Ten patients were randomized to the single agent arm and 9 patients to the combination arm. Six patients received the therapy as second line (2 combination arm and 4 single agent arm). Mean 3 week cycles per patient: 9 (4-16) in combination arm and 7 (2-14) in single arm group. Response at 9 weeks in the combination arm: partial response (PR) 6 (67%), stable disease (SD) 2 (22%), and progressive disease (PD) 1 (11%). Response at 9 weeks in the single agent arm, PR 2 (20%), SD 4 (40%), and PD 4 (40%). Adverse events in combination arm: 1 (11%) discontinued therapy due to grade 3 fatigue, 3 (33%) discontinued carboplatin due to allergic reactions at 7, 9, and 10 months of treatment but continued pembrolizumab and paclitaxel, and 1 (11%) on hormone replacement therapy due to treatment-induced hypothyroidism. Adverse events in single agent arm: 1 (10%) discontinued treatment due to complete A-V block successfully resolved with pacemaker insertion, and 2 (20%) are on hormone replacement therapy due to treatment-induced hypothyroidism.
Combination pembrolizumab and weekly low dose carboplatin/paclitaxel is an active and well tolerated regimen in patients with advanced NSCLC with PS of 2.