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H. Kushner
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P3.01 - Poster Session/ Treatment of Advanced Diseases – NSCLC (ID 208)
- Event: WCLC 2015
- Type: Poster
- Track: Treatment of Advanced Diseases - NSCLC
- Presentations: 1
- Moderators:
- Coordinates: 9/09/2015, 09:30 - 17:00, Exhibit Hall (Hall B+C)
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P3.01-054 - Etirinotecan Pegol (NKTR-102) in the Treatment of Patients with Metastatic NSCLC after Failure of 2nd Line Treatment: A Phase II Study (ID 717)
09:30 - 09:30 | Author(s): H. Kushner
- Abstract
Background:
3rd line treatment options are limited for patient (pts) with metastatic NSCLC. NKTR-102 is a long-acting topoisomerase-I inhibitor designed to concentrate in tumors and provide continuous exposure throughout the chemotherapy cycle. Based on clinical activity of irinotecan in NSCLC, we conducted a Phase II single arm trial to evaluate efficacy of NKTR-102.
Methods:
Pts >18 yrs with histologically proven NSCLC who received 2 prior systemic therapy regimens were eligible. Measurable disease, ECOG PS ≤1 and adequate end organ function were required. NKTR-102, 145mg/m2 was administered IV q3 weeks till progression. Response was assessed q6 weeks by RECIST 1.1. Primary endpoint was overall response rate. Secondary endpoints were progression free survival (PFS), overall survival (OS) and safety. Simon two-stage design was implemented; if 0/12 responses were observed in the 1st stage, the study would be terminated for futility. If there was at least 1 objective response in the 1st stage, the study would continue to stage 2, enrolling an additional 25 pts, for a total of 37.
Results:
Between 01/2013 and 01/2015, 37 pts have been enrolled. Median age 63 yrs (18-82), 45% female, ECOG PS 0=8 pts, 92% current/former smokers, 9 pts with squamous cell, 28 had adenocarcinoma. Median time from diagnosis to initiation of NKTR-102 was 18 mos (6-72). Pts received a median of 3 cycles (1-13). All pts were evaluable for response rate and toxicity. One pt in Stage I (adenocarcinoma) had a partial response. Fifteen pts had stable disease, 7 pts are still on treatment. 3 pts had Grade 3 GI toxicity attributable to NKTR-102. 6 pts required a dose reduction to 120 mg/m2 due to diarrhea. There was no hematological toxicity. Median PFS was 2.3 mos. For pts with >1 yr follow up (n=20), median OS was 5.5 mos. Complete PFS and OS data will be presented.
Conclusion:
NKTR-102 is well tolerated and leads to stabilization of disease in third line treatment of metastatic NSCLC. These clinical data combined with a favorable safety profile warrant further clinical investigation of this agent. Clinical trial information: NCT01773109.
