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Germline Pathogenic Variants Impact Clinicopathology of Advanced Lung Cancer
Semanti Mukherjee1,2, Chaitanya Bandlamudi3, Matthew D Hellmann1
1Department of Medicine, Memorial Sloan Kettering Cancer Center, New York.
Summary
Germline pathogenic variants (PV) in DNA damage repair genes are significant risk factors for lung cancer. Identifying these genetic mutations can aid in early diagnosis and proactive surveillance for at-risk families.
Area of Science:
- Genetics
- Oncology
- Genomics
Background:
- Genetic factors influencing lung cancer risk are not fully understood.
- Germline pathogenic/likely pathogenic variants (PV) play a role in cancer development.
- Defining the prevalence and significance of germline PV in advanced lung cancer is crucial.
Purpose of the Study:
- To determine the prevalence of germline PV in patients with advanced lung cancer.
- To investigate the clinical significance of these germline PV.
- To identify specific genes and pathways associated with lung cancer risk.
Main Methods:
- Prospective genomic profiling of 5,118 patients with advanced lung cancer.
- Analysis of paired tumor-normal tissue samples.
- Evaluation of 468 cancer genes for germline PV.
Main Results:
- Germline PV in high/moderate-penetrance genes were found in 4.3% of patients.
- DNA damage repair (DDR) pathway genes, including BRCA2, CHEK2, and ATM, were frequently affected.
- BRCA2 heterozygotes with lung adenocarcinoma showed improved survival and were more likely to be never smokers.
- Patients with germline PV in lung cancer predisposing genes were diagnosed younger.
- High-risk patients (family history, multiple tumors, early diagnosis) had a higher detection rate of germline PV (10.5% vs. 4.1%).
Conclusions:
- Germline mutations in highly penetrant DDR genes are important risk factors for lung cancer.
- These findings highlight the biological and clinical importance of inherited genetic variations in lung cancer.
- Genetic counseling and surveillance are recommended for families of lung cancer patients with predisposing germline PV.
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