| Literature DB >> 36118132 |
Alissa J Cooper1, Alona Muzikansky2, Jochen Lennerz3, Farhaana Narinesingh3, Mari Mino-Kenudson3, Yin P Hung3, Zofia Piotrowska1, Ibiayi Dagogo-Jack1, Lecia V Sequist1, Justin F Gainor1, Jessica J Lin1, Rebecca S Heist1.
Abstract
Introduction: Co-occurring mutations in KRAS-mutant NSCLC are associated with discrete biological properties and modulate therapeutic susceptibilities. As G12D-specific inhibitors are expected to enter the clinic, we sought to investigate the characteristics and outcomes of patients with KRAS G12D-mutant NSCLC.Entities:
Keywords: Co-mutations; KRAS mutation; Non–small cell lung cancer; Targeted therapies
Year: 2022 PMID: 36118132 PMCID: PMC9471201 DOI: 10.1016/j.jtocrr.2022.100390
Source DB: PubMed Journal: JTO Clin Res Rep ISSN: 2666-3643
Characteristics of Patients With KRAS G12D-Mutant NSCLC
| Characteristics | Overall (N = 107) |
|---|---|
| Age at diagnosis, median (range) | 68 (29–90) |
| Sex | |
| Male | 43 (40.2) |
| Female | 64 (59.8) |
| Race | |
| White | 93 (86.9) |
| Black | 3 (2.8) |
| Asian | 3 (2.8) |
| Hispanic | 4 (3.7) |
| Unavailable | 4 (3.7) |
| Smoking status | |
| Never | 17 (15.9) |
| Former | 80 (74.8) |
| Current | 10 (9.4) |
| Pack-years, median (range) | 25 (0–150) |
| Initial stage | |
| Stage I | 27 (25.2) |
| Stage II | 8 (7.5) |
| Stage III | 21 (19.6) |
| Stage IV | 51 (47.7) |
| Ever metastatic | 75 (70.1) |
| CNS mets | 27 (36.0) |
| At initial diagnosis | 14 (18.7) |
| Extrathoracic mets | 51 (68.0) |
| At initial diagnosis | 37 (49.3) |
| Histology | |
| Adenocarcinoma | 93 (86.9) |
| Squamous cell | 2 (1.9) |
| Adenosquamous | 1 (0.9) |
| Other | 11 (10.3) |
| PD-L1 | |
| <1% | 24 (22.4) |
| 1%–49% | 19 (17.8) |
| | 13 (12.2) |
| Not evaluated | 51 (47.7) |
| Co-mutation present | |
| STK11 | 17 (15.9) |
| KEAP1 | 10 (9.4) |
| TP53 | 36 (33.6) |
| STK11/KEAP1 | 7 (6.5) |
| STK11/TP53 | 3 (2.8) |
| KEAP1/TP53 | 2 (1.9) |
| STK11/KEAP1/TP53 | 1 (0.9) |
| Metastatic (n = 57) | |
| First-line systemic treatment received | |
| Chemotherapy alone | 29 (50.9) |
| Platinum + pemetrexed | 19 (33.3) |
| Platinum + taxane | 2 (3.5) |
| Pemetrexed alone | 3 (5.3) |
| Included VEGF inhibitor | 5 (8.8) |
| Immunotherapy alone | 17 (29.8) |
| Pembrolizumab | 13 (22.8) |
| Atezolizumab | 1 (1.8) |
| Nivolumab | 1 (1.8) |
| Ipilimumab + nivolumab | 2 (3.5) |
| Chemotherapy + immunotherapy | 11 (19.3) |
| Treatment lines | |
| One | 24 (42.1) |
| Two | 22 (38.6) |
| Three | 4 (7.0) |
| Four or more | 7 (12.3) |
CNS, central nervous system; mets, metastases; PD-L1, programmed death-ligand 1; VEGF, vascular endothelial growth factor.
KEAP1 not evaluated in 49 patients (45.8%) with an earlier version of SNaPshot performed. Among 58 patients with KEAP1 testing, 10 (17.2%) were positive.
Figure 1Summary of PD-L1 level and molecular alterations in patients with KRAS G12D-mutated NSCLC. This heatmap summarizes the findings of PD-L1 level (top) and molecular alterations (bottom) for each patient in the cohort, with never smokers (blue), former smokers (green), and current smokers (peach) delineated. Squares populated with gray in the PD-L1 and KEAP1 fields indicate that these tests, respectively, were not available for inclusion. PD-L1, programmed death-ligand 1.
Figure 2Association of PD-L1 level with molecular alterations. Scatterplot of percent expression of PD-L1 (y axis) is illustrated in relationship to molecular wild-type (blue circles) or mutant (red triangles) status. PD-L1 expression was similar among wild-type and mutant for TP53 and SMARCA4 mutations, but relatively lower in STK11- and KEAP1-mutant samples compared with wild type. PD-L1, programmed death-ligand 1.
First-Line Systemic Therapy Among Patients With Metastatic KRAS G12D-Mutant NSCLC by Presence or Absence of Co-Mutation
| Co-Mutation | Chemotherapy Alone, n (%) | Immunotherapy Alone, n (%) | Chemoimmunotherapy, n (%) | Total n |
|---|---|---|---|---|
| 4 (40.0) | 2 (20.0) | 4 (40.0) | 10 | |
| 25 (53.2) | 15 (26.3) | 7 (14.9) | 47 | |
| 3 (42.9) | 1 (14.3) | 3 (42.9) | 7 | |
| 13 (40.1) | 11 (34.4) | 8 (13.3) | 32 | |
| 13 (72.2) | 5 (27.8) | 0 (0) | 18 | |
| 12 (57.1) | 9 (42.9) | 0 (0) | 21 | |
| 17 (47.2) | 8 (22.2) | 11 (30.1) | 36 | |
| 4 (50.0) | 3 (37.5) | 1 (12.5) | 8 | |
| 25 (51.0) | 14 (28.6) | 10 (20.4) | 49 |
mut, mutated; unk, unknown; WT, wild type.
Figure 3Median PFS among patients with metastatic disease treated with first-line therapy. PFS of the overall population is illustrated (A) and stratified by STK11 mutation (B), SMARCA4 mutation (C), KEAP1 mutation (D), and TP53 mutation (E). Plus signs represent data censored at the last time the patient was known to be without progression. CI, confidence interval; PFS, progression-free survival.
Figure 4Median OS among patients with metastatic disease treated with first-line therapy. OS of the overall population is illustrated (A) and stratified by STK11 mutation (B), SMARCA4 mutation (C), KEAP1 mutation (D), and TP53 mutation (E). Plus signs represent data censored at the last time the patient was known to be alive. CI, confidence interval; OS, overall survival.