Randomized comparison of two doses of the anti-PD-1 monoclonal antibody MK-3475 for ipilimumab-refractory (IPI-R) and IPI-naive (IPI-N) melanoma (MEL).
Bibliographic record
Abstract
3000 Background: MK-3475 has shown durable antitumor activity in MEL across multiple doses and schedules. We compared the efficacy and safety of 2 MK-3475 doses in MEL patients (pts). Methods: In separate cohorts, IPI-N and IPI-R pts were randomized 1:1 to MK-3475 2 or 10 mg/kg every 3 wk (2 Q3W or 10 Q3W). IPI-N pts received ≤2 prior systemic therapies. IPI-R pts had any number of prior therapies and unequivocal or confirmed PD per immune-related response criteria (irRC) after ≥2 IPI doses; all BRAF-mutant pts were previously treated with BRAF inhibitors. Primary endpoint was ORR assessed by RECIST 1.1 every 12 wk by independent central review. Investigator-assessed response by irRC was also obtained. Results: A total of 276 pts were randomized (103 IPI-N [2 Q3W, n = 51; 10 Q3W, n = 52] and 173 IPI-R [2 Q3W, n = 89; 10 Q3W, n = 84]. In both cohorts, treatment arms were well balanced for known prognostic factors. As of the 10/18/2013 cutoff, all IPI-N and 47% of IPI-T pts had ≥9 mo of follow-up. Among evaluable pts, no significant differences in ORR by RECIST were observed between doses in IPI-N (33% vs 40%) or IPI-R (26% vs 26%) pts. By RECIST, response duration ranged from 6+ wk to 39+ wk in both cohorts (median not reached), with ~90% of responses ongoing. PFS by RECIST was similar between doses. The safety profile was generally similar between pts treated with 2 Q3W and 10 Q3W. There were no drug-related deaths. Conclusions: MK-3475 2 mg/kg Q3W and 10 mg/kg Q3W provided similar efficacy and safety in both IPI-N pts and IPI-R pts. Treatment was well tolerated with acceptable toxicity profile. The high ORR provided by MK-3475 comes with long durability in both IPI-N and IPI-R MEL. Clinical trial information: NCT01295827. RECIST 1.1 irRC 2 Q3W 10 Q3W 2-sided P 2 Q3W 10 Q3W 2-sided P IPI-N ORR, % (95% CI) 33 (20-49) 40 (26-56) .4835 39 (26-54) 40 (27-55) .9040 Response duration, wk, range 7+ – 36+ 6+ – 39+ — 12+ – 42+ 10+ – 39+ — Median PFS, wk(95% CI) 27 (12-NR) 23 (12-48) — 36 (13-NR) 26 (12-NR) — 24-wk PFS, % 51 48 — 60 50 — IPI-R ORR, % (95% CI) 26 (17-37) 26 (17-38) .9558 27 (18-37) 32 (22-43) .4568 Response duration, wk, range 6+ – 37+ 8+ – 37+ — 12+ – 42+ 4+ – 37+ — Median PFS, wk (95% CI) 22 (12-36) 14 (12-24) — 31 (22-48) 35 (24-NR) — 24-wk PFS, % 45 37 — 57 57 —
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.005 | 0.004 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 teacher head, 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".