A phase 1b/2 study of napabucasin with weekly paclitaxel in advanced, previously treated non-squamous non-small cell lung cancer.
Bibliographic record
Abstract
9052 Background: Napabucasin is a first-in-class cancer stemness inhibitor, identified by its ability to inhibit STAT3-driven gene transcription and spherogenesis of cancer stem cells (Li et al PNAS 112 (6):1839, 2015). Napabucasin has shown potent synergistic preclinical anti-tumor activity with paclitaxel (PTX). In a phase Ib dose escalation study in patients (pts) with advanced solid tumors, napabucasin plus weekly PTX was well tolerated. A phase II expansion cohort was opened for pts with advanced non-small cell lung cancer (NSCLC). Methods: Pts with metastatic non-squamous NSCLC were enrolled to confirm safety and preliminary anti-cancer activity. Prior platinum-based systemic therapy was required, and patients with an EGFR or ALK mutation required appropriately targeted therapy. Napabucasin was administered orally at a starting dose of 240 or 480 mg BID with PTX 80 mg/m2 IV weekly 3 of every 4 weeks. AEs were evaluated using CTCAE v4.03 and objective assessments were performed every 8 weeks per RECIST 1.1. Results: A cohort of 23 pts with advanced non-squamous NSCLC was evaluated. The median number of prior systemic treatment lines was 3, including taxane-based therapy in 100% and immune checkpoint inhibitor in 48% (n = 11). Treatment was well tolerated; related grade 3 AE included diarrhea (n = 4) and fatigue (n = 1). The objective response rate was 26% (6 partial responses [PR]) and the disease control rate (DCR; proportion with SD at 8 weeks plus PR per RECIST) was 70% (n = 16). Tumor regression, including PR, occurred in 35% (n = 8). The median progression-free survival (mPFS) was 5.4 months, and 43% (n = 10) of pts were alive and free of progression at the 24 week time-point or longer. The median overall survival (mOS) was 11.0 months, and 30% (n = 7) of pts were alive for 52 weeks or longer. Conclusions: Clinical safety and encouraging signs of anti-cancer activity were observed in pts with heavily pretreated non-squamous NSCLC who received napabucasin plus weekly paclitaxel. The objective response rate, progression free survival, and overall survival in this population warrant further clinical evaluation and a controlled phase 2/3 trial (CanStem43L) has been initiated. Clinical trial information: NCT01325441.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.003 |
| Insufficient payload (model declined to judge) | 0.005 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".