Mutations were observed in all genes studied, except c-MET, DDR2, MAP2K1, and RET.
The multivariable analysis showed that:
- Niche mutations had higher mortality than EGFR mutations
- KRAS mutations had higher mortality than EGFR mutations, and
- Niche mutations presented similar mortality to KRAS mutations.
Niche mutations exhibited an increased risk of death when compared with EGFR mutations and a similar risk of death when compared with KRAS mutations.
Dr. Beatrice Aramini from the Division of Thoracic Surgery in Department of Medical and Surgical Sciences at the University of Modena and Reggio Emilia in Modena Italy said in their Oncotarget Research Paper:
In the last century, carcinoma of the lung has progressed from an uncommon and obscure disease to the most common cancer in the world, and the most common cause of death from cancer."
In addition to these somatic mutations, which are the most frequent, other mutations in several genes have been discovered, including BRAF, c-MET, DDR2, HER2, MAP2K1, NRAS, PIK3CA, and RET mutations.
Moreover, the prevalence of the RET mutation in adenocarcinoma was estimated to be 1.7%, and the prevalence of DDR2 mutation in lung cancer was 2.2%.
With regard to treatment, discoveries of gene mutations have allowed the development of targeted therapies, which are considered more effective for survival than chemotherapy in patients with advanced mutated disease.
Considering the potential aggressiveness of niche mutations in this context, the technological advances of next-generation sequencing, which is currently used in clinical practice, represents a precise approach to identifying a large panel of mutations in oncologic patients.
The Armini Research Team concluded:
The correct selection of mutations will be helpful in terms of the greater efficacy of treatment in association with better prognosis and a higher quality of life for oncologic patients."
Aramini, B., et al. (2020) Overall survival in patients with lung adenocarcinoma harboring “niche” mutations: an observational study. Oncotarget. doi.org/10.18632/oncotarget.27472.