The pattern of KRAS mutations in non-small cell lung cancer (NSCLC): A retrospective study from south-eastern Georgia.

Authors

null

Sabrina Matosz

Medical College of Georgia At Augusta Univerity, Augusta, GA

Sabrina Matosz , Mostafa Elzaidy , Nagla Fawzy Abdel Karim

Organizations

Medical College of Georgia At Augusta Univerity, Augusta, GA, Maadi Military Hospital, Cairo, Egypt, Augusta University Medical Center, Augusta, GA

Research Funding

No funding received

Background: Carcinogenic Kirsten rat sarcoma viral oncogene homolog (KRAS) mutation is a common oncogenic mutation found in lung cancer. It is a gain-of-function mutation that is the most commonly mutated oncogene in NSCLC; occurs in about 30% of all lung adenocarcinomas. A lot of progress has been made in targeted therapies against other oncogenic drivers, such as EGFR, HER2, MET, BRAF mutations. However, KRAS mutant lung cancer is still very difficult to manage and options are limited. Most recently, K-ras G12C has a newly approved novel targeted therapy. Different KRAS mutations may also represent different outcomes. Multiple studies have been looking into mutant KRAS and investigating it in the clinical relevance in lung cancer. Here we characterize a cohort of KRAS subtypes in all tumor types of lung cancer from south-eastern Georgia. Methods: This is a retrospective study that evaluated patients with K-ras mutant lung cancer from Augusta, Georgia geographical area. Samples were obtained from May 15th, 2015 to January 4th, 2022 and patients with KRAS mutant lung cancers were identified via Guardant platform. Results: In our cohort of patients, a total of 622 patients were evaluated in which 531 patients had a lung cancer diagnoses. Of those 531 patients, 383 had lung adenocarcinoma, 109 lung squamous cell, 34 NSCLC, 3 small cell, 1 lung carcinoid, and 1 large cell lung carcinoma. Of the 531 lung cancer patients, 14 (2.6%) patients expressed KRAS mutation with 12 (3.1%) patients expressing KRAS with lung adenocarcinoma. NRAS was expressed separately in 2 patients and HRAS was expressed separately in 1 patient. Our cohort of patients with K-ras mutant NSCLC had TP53 co-mutation in 78 (14%), MSI-High mutation in 60 (11%) patients, and EGFR mutation in 23 (4.3%) patients. The most common KRAS subtype in lung adenocarcinoma was G12V (42%), G12C (42%), and Y64D (8.3%). Two patients were unable to identify the type of the K-ras mutation. In addition, 92% of the carriers for KRAS mutation in lung adenocarcinoma were males. Its been noted that G12C mutation is the most common; however, in south-east Georgia, G12V is as common as G12C. Conclusions: KRAS mutation subtypes have distinct genomic landscape which requires further assessment to guide future therapeutic development. In the geographical area of Augusta, Georgia, KRAS subtype G12V is as common as G12C.

Disclaimer

This material on this page is ©2024 American Society of Clinical Oncology, all rights reserved. Licensing available upon request. For more information, please contact licensing@asco.org

Abstract Details

Meeting

2022 ASCO Annual Meeting

Session Type

Publication Only

Session Title

Developmental Therapeutics—Molecularly Targeted Agents and Tumor Biology

Track

Developmental Therapeutics—Molecularly Targeted Agents and Tumor Biology

Sub Track

Tissue-Based Biomarkers

Citation

J Clin Oncol 40, 2022 (suppl 16; abstr e15110)

DOI

10.1200/JCO.2022.40.16_suppl.e15110

Abstract #

e15110

Abstract Disclosures

Similar Abstracts

First Author: Yasmeen Rauf

First Author: Alexander Watson

Abstract

2023 ASCO Gastrointestinal Cancers Symposium

Circulating tumor DNA–based genomic landscape of KRAS wild-type pancreatic adenocarcinoma.

First Author: Brendon Fusco

Abstract

2023 ASCO Annual Meeting

The clinical and genomic characteristics of KRAS G12D mutated cancers.

First Author: Guomin Lin