Randomized phase II study of gemcitabine (G), cisplatin (C) with or without veliparib (V) (arms A, B) and a phase II single-arm study of single-agent veliparib (arm C) in patients with <i>BRCA or PALB2</i>-mutated pancreas adenocarcinoma (PC).
Bibliographic record
Abstract
TPS4144 Background: Germline mutations in BRCA1, 2 predispose to PC (Lal, G. Cancer Res, 2000). 5-8% PC have BRCA 1,2 mutations; higher in Ashkenazi Jewish (10-15%). Pre-clinical data demonstrates that platinums and poly-ADP ribose polymerase inhibitors (PARPi) have activity in BRCA-mutated PC models. Early clinical data supporting (Lowery, M. Oncol, 2011). We are evaluating the role of platinum agents and PARPi, veliparib (ABT-888), in BRCA or PALB2-mutated PC. Methods: Arm A, B: Includes non-randomized phase to optimize V dose combined with G, C (Arm A). Subsequently randomized phase II study will evaluate G, C +/- V. Primary endpoint: RECIST 1.1 response rate (RR) G, C, V (Arm A) and G, C (Arm B). Secondary endpoints: Progression-free survival, safety, disease-control rate, overall survival and correlatives involving pre, post biopsies to evaluate mechanisms of sensitivity, resistance to platinums, PARPi. Arm C: Evaluates single-agent V in previously-treated PC. Primary and secondary endpoints similar. Eligibility: BRCA, PALB2-mutated, measurable, stage III/IV PC; Untreated (Arm A, B), ≤ 2 lines therapy (Arm C); ECOG 0-1 (Arm A, B), ECOG 0-2 (Arm C). Treatment Plan: Arm A, B: V PO BID d1-12 (Arm A), q 3 weeks, G 600mg/m2 IV, C 25mg/m2IV, both d3, 10, q 3 weeks (Arm A, B). Arm C: V 400mg PO BID d1-28 q 4 weeks. Biostatistics: Arms A, B: Simon’s 2-stage minimax design per arm. Unacceptable RR 10%, promising 30%, type I, II errors 10%. N= 16 stage I, +N= 9 (stage II). If ≥ 5/25, then promising. If both arms promising, option to add N= 10, allows distinction between RR 20% and 40%, 83% power. Arm C: Simon’s 2-stage, single-arm, uninteresting RR 10%, promising if ≥ 28%. N= 15 stage I, +N= 18 (stage II). Promising RR ≥ 6/33. Total N 47- 95. Contingency for slow accrual. Progress to Date: Accrual: Arm A (non-randomized): 13 screened, N= 5 enrolled. Arm C: 9 screened, N= 4 enrolled. Israeli, Canadian, other U.S. sites opening 2013. Funding and acknowledgements: National Cancer Institute, Lustgarten Foundation. NCT01585805. Clinical trial information: NCT01585805.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.004 | 0.003 |
| Meta-epidemiology (narrow) | 0.003 | 0.002 |
| Meta-epidemiology (broad) | 0.003 | 0.002 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.003 | 0.006 |
| Insufficient payload (model declined to judge) | 0.013 | 0.002 |
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".