Mirvetuximab soravtansine, a folate receptor alpha (FRα)-targeting antibody-drug conjugate (ADC), in combination with bevacizumab in patients (pts) with platinum-agnostic ovarian cancer: Final analysis.
Bibliographic record
Abstract
5504 Background: Mirvetuximab soravtansine (MIRV) is an ADC comprising a FRα-binding antibody, cleavable linker, and the maytansinoid DM4, a potent tubulin-targeting agent. As part of the Phase 1b FORWARD II trial (NCT02606305), the combination of MIRV with bevacizumab (BEV) was evaluated in pts with FRα-positive (medium/high expression; ≥50%/ ≥75% of cells with PS2+ staining intensity), platinum agnostic ovarian cancer, defined as pts with either platinum resistant (PROC) (recurrence within 6 months after last platinum dose) or platinum sensitive (PSOC)responded to the last platinum therapy and did not progress within 6 months) for whom a non-platinum based doublet would be appropriate. Methods: Pts received MIRV (6 mg/kg; adjusted ideal body weight) and BEV (15 mg/kg) on Day 1 of a 21-day cycle. Responses were assessed by investigator according to RECIST 1.1 and adverse events (AEs) evaluated by CTCAE v4.03. Results: In total, 60 pts received the combination, with a median age of 60 years, a median of 2 prior lines of systemic therapy (range 1-4) and a median follow-up of 17.5 months. The cohort included 32 pts (53%) with PROC disease and 28 (47%) with PSOC disease. Objective responses were seen in 28 of 60 pts for a confirmed overall response rate (ORR) of 47% (95% CI, 34, 60), median duration of response (mDOR) of 9.7 months (95% CI 6.7, 12.9), and median progression free survival (mPFS) of 8.3 months (95% CI 5.6, 10.6). In pts with high FRα expression (n=33), the confirmed ORR was 64% (95% CI 45, 80), mDOR of 11.8 months (95% CI 6.7, 13.7), and mPFS of 10.6 months (95% CI 8.3, 13.3); efficacy results in PROC and PSOC subsets of pts with high FRα expression are shown in the table below. The most common treatment related AEs (all grade, grade 3+) were diarrhea (68%, 2%), blurred vision (63%, 2%), fatigue (58%, 7%), and nausea (57%, 0%). The most common treatment related grade 3 and 4 AEs were neutropenia and hypertension, (12%, 3% and 13%, 0%, respectively); all other grade 3+ events occurred in ≤ 10% of pts. Conclusions: The combination of MIRV with BEV demonstrates impressive anti-tumor activity with durable responses and favorable tolerability in high FRα recurrent ovarian cancer. These results build on data previously reported for MIRV/BEV in PROC patients ( Gyn Oncology O’Malley, et al 2020), suggesting that MIRV has the potential to be a preferred partner for BEV in patients with high FRα recurrent ovarian cancer regardless of platinum sensitivity. Clinical trial information: NCT02606305. [Table: see text]
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.002 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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 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".