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P1.02 - Biology/Pathology (ID 614)
- Event: WCLC 2017
- Type: Poster Session with Presenters Present
- Track: Biology/Pathology
- Presentations: 1
- Coordinates: 10/16/2017, 09:30 - 16:00, Exhibit Hall (Hall B + C)
P1.02-040 - Genetic Risk Evaluation in Families with Lung Cancer History in High Lung Cancer Mortality Region of Xuanwei, China (ID 7490)
09:30 - 16:00 | Author(s): X. Ding
Compared with the numerous studies of somatic mutations using sporadic lung cancer, the research into germline mutations using familial lung cancer (FLC) is very limited. In the present study, we used FLC samples obtained from the Chinese population in highly air-polluted regions to screen for novel germline mutations in lung cancer.
Through a whole genome sequencing (WGS) analysis of the nine subjects (four lung cancer patients and five normal family members of FLC), we obtained a whole genome dataset of DNA alterations in FLC samples. A total of 1218 genes were identified with mutations of multiple types. Subsequently, the top 12 highly mutated genes were selected for validation by PCR and DNA sequencing in an expanded sample set including FLC, sporadic lung cancer, and healthy population.
Mutations of the five genes (ARHGEF5, ANKRD20A2, ZNF595, ZNF812, MYO18B) may be potential germline mutations of lung cancer. We also analyzed specific mutations within the 12 genes and found that some specific mutations within the MUC12, FOXD4L3 and FOXD4L5 genes showed higher frequencies in the samples of FLC and/or lung cancer tissue, compared with the healthy population. Moreover, some genes with copy number variation may be potentially associated with a predisposition to lung cancer. Furthermore, non-coding DNA alterations of the WGS data in FLC were systematically analyzed and arranged. Interestingly, we found that germline mutations also occurred in many non-coding genes.
Our study uncovered the mutation spectrum in FLC of the Chinese population. The investigation of novel and known gene mutations detected by the present study may contribute to evaluate functional impacts of these mutations not only in FLC but in sporadic lung cancer as well.
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