Pan-tumor activity of olomorasib (LY3537982), a second-generation KRAS G12C inhibitor (G12Ci), in patients with <i>KRAS</i> G12C-mutant advanced solid tumors.
Bibliographic record
Abstract
3007 Background: Olomorasib is a potent and highly selective second-generation inhibitor of GDP-bound KRAS G12C, which preclinically delivers >90% sustained target occupancy. Here, we report updated results from LOXO-RAS-20001, a phase 1/2 study of olomorasib in patients with KRAS G12C-mutant advanced solid tumors (NCT04956640). Methods: Patients (pts) with advanced solid tumors positive for KRAS G12C (tissue or plasma) were eligible. Dose escalation used a mTPI-2 method, followed by expansion cohorts in NSCLC (with/without prior G12Ci), CRC, and other solid tumors. Safety was evaluated across all pts dosed. Antitumor activity per RECIST v1.1 was studied in all pts who had ≥1 post-baseline response assessment (PBRA) or had discontinued before the first PBRA. Serial ctDNA analysis was performed using FoundationOne Liquid CDx. Results: As of 30 October 2023, 157 pts (58 NSCLC, 32 CRC, 24 PANC, 43 other solid tumors) received single agent olomorasib (50-200 mg BID PO); 29 pts with NSCLC had received a prior KRAS G12Ci. Median age was 65 yrs (range, 36-85), median number of prior systemic therapies was 3 (range, 0-11). Any grade TRAEs were 62%; TRAEs ≥10% were diarrhea (24%), fatigue (10%), and nausea (10%); grade ≥3 TRAEs were 5%. TRAEs led to dose hold in 10% of pts, dose reduction in 3%, and discontinuation in 2%. Among 10 pts treated after discontinuing prior G12Ci due to toxicity (5/10 due to LFT increase), 1 pt (10%) required olomorasib dose reduction and none discontinued due to toxicity. 68 pts are ongoing and 89 discontinued treatment. 146 pts were efficacy evaluable (120 G12Ci-naïve; 26 with prior G12Ci) with a median follow-up of 10 months (95% CI, 7-13). As anticipated, ORR was lower in 32 pts with CRC (9%, 3 PR; DCR 84%) 1 and higher in 88 pts with non-CRC tumors (40%, 30 PR and 5 uPR pending/ongoing in 13 unique tumor types; DCR 90%). mPFS ranged across tumor types from 4 months (CRC, 95% CI, 3-7) to 9 months (NSCLC, 95% CI, 3-NE). In the 26 efficacy evaluable NSCLC pts with prior KRAS G12Ci treatment (16 discontinued due to PD, 9 due to AE), the ORR was 39% (9 PR, 1 uPR pending/ongoing; DCR 73%); mPFS was 6 months (95% CI, 3-NE). In 37 pts with ctDNA results at baseline and ongoing, ctDNA response (>50% KRAS G12C VAF reduction) was seen in pts with PR (11/11), SD (17/22), and PD (1/4). Conclusions: Olomorasib demonstrates efficacy across a range of KRAS G12C-mutant solid tumors with a favorable safety profile including in pts with prior G12Ci intolerance. Activity of the second-generation G12Ci olomorasib after prior exposure to G12Ci demonstrates the increased potency and target coverage these agents can deliver compared to first generation inhibitors. Phase 2 expansion is currently enrolling pts with PANC, and a global registrational study investigating olomorasib in combination with pembrolizumab in first-line NSCLC is ongoing (NCT06119581). 1. Hollebecque A. et al. ASCO-GI 2024. Clinical trial information: NCT04956640 .
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 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 | 0.002 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".