1
|
Taieb J, Sinicrope FA, Pederson L, Lonardi S, Alberts SR, George TJ, Yothers G, Van Cutsem E, Saltz L, Ogino S, Kerr R, Yoshino T, Goldberg RM, André T, Laurent-Puig P, Shi Q. Different prognostic values of KRAS exon 2 submutations and BRAF V600E mutation in microsatellite stable (MSS) and unstable (MSI) stage III colon cancer: an ACCENT/IDEA pooled analysis of seven trials. Ann Oncol 2023; 34:1025-1034. [PMID: 37619846 PMCID: PMC10938565 DOI: 10.1016/j.annonc.2023.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/05/2023] [Accepted: 08/10/2023] [Indexed: 08/26/2023] Open
Abstract
BACKGROUND The prognostic value of KRAS and BRAFV600E mutations in stage III colon cancer (CC) remains controversial and has never been clearly analyzed in patients with microsatellite instability-high (MSI-H) tumors due to sample size limitations. Data are also lacking for KRAS submutations and prognosis. PATIENTS AND METHODS We examined clinicopathological variables and prognosis in patients with surgically resected stage III CC who participated in seven clinical trials from the ACCENT/IDEA databases. Associations between KRAS exon 2 and BRAFV600E mutations and time to recurrence (TTR), overall survival (OS), and survival after recurrence (SAR) were assessed using a Cox model. We also analyzed the prognostic value of KRAS exon 2 submutations. RESULTS Among 8460 patients, 11.4% had MSI-H status. In the MSI-H group, BRAFV600E, KRAS exon 2 mutants, and double-wild-type statuses were detected in 40.6%, 18.1%, and 41.3%, respectively, whereas and in the microsatellite stable (MSS) group, these were detected in 7.7%, 38.6%, and 53.8%, respectively. In the MSS group, 5-year TTR rates of 61.8%, 66.3%, and 72.9% were observed among patients with BRAFV600E, KRAS exon 2 mutants, and those who were DWT, respectively [adjusted hazard ratio (HR) = 1.58 and 1.31, both P < 0.001]. In the MSI-H group, 5-year TTR rates did not differ significantly among the mutated subgroups. Similar results were found for OS. However, survival after relapse was significantly shorter in the KRAS exon 2- and BRAFV600E-mutated patients in both MSS (adjusted HR = 2.06 and 1.15; both P < 0.05) and MSI-H (adjusted HR = 1.99 and 1.81; both P < 0.05) groups. In the MSS group, KRAS exon 2 mutations were associated with TTR, but only p.G12C, p.G12D, and p.G13D were associated with poor outcomes after disease recurrence. CONCLUSIONS Testing for both KRAS and BRAFV600E mutations in stage III patients should be considered as they can better define individual patient prognosis, and may also enable patient selection for (neo)adjuvant trials dedicated to specific molecular subtypes with poor prognosis.
Collapse
Affiliation(s)
- J Taieb
- Department of Gastroenterology and Digestive Oncology, Hôpital Européen Georges Pompidou, Université Paris Cité, AP-HP, SIRIC CARPEM, Paris, France; Department of Oncology, Mayo Clinic, Rochester, USA.
| | | | - L Pederson
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, USA
| | - S Lonardi
- Department of Oncology, Veneto Institute of Oncology IRCCS, Padua, Italy
| | - S R Alberts
- Department of Oncology, Mayo Clinic, Rochester, USA
| | - T J George
- Department of Oncology, University of Florida and the University of Florida Health Cancer Center, Gainesville, USA
| | - G Yothers
- Department of Biostatistics, University of Pittsburgh, Pittsburgh, USA
| | - E Van Cutsem
- Department of Digestive Oncology, University Hospitals Gasthuisberg Leuven and KU Leuven, Leuven, Belgium
| | - L Saltz
- Department of Oncology, Memorial Sloan Kettering Cancer Center, New York, USA
| | - S Ogino
- Department of Pathology, Brigham & Women's Hospital, Boston, USA
| | - R Kerr
- Department of Oncology, Oxford University, Oxford, UK
| | - T Yoshino
- Department of Gastrointestinal Oncology, National Cancer Center Hospital East, Kashiwa, Japan
| | - R M Goldberg
- Department of Oncology, West Virginia University Cancer Institute, Morgantown, USA; Mary Babb Randolph Cancer Center, Morgantown, USA
| | - T André
- Sorbonne Université, Department of Medical Oncology, Hôpital Saint-Antoine, Paris, France
| | - P Laurent-Puig
- Institut du cancer Paris CARPEM, AP-HP, Université Paris Cité, Paris, France; Hôpital Européen Georges Pompidou, Department of Tumor and Cancer Genomic Medicine, Paris, France; Centre de Recherche des Cordeliers, Sorbonne Université, Inserm, Université de Paris Cité, Team Personalized Medicine, Phamacogenomics and Therapeutic Optimization, Paris, France
| | - Q Shi
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, USA
| |
Collapse
|