Conduct a prospective study to confirm the value of circulating tumor DNA and its aberrant methylation in longitudinal monitoring of surgical lung cancer patients.
Studies have already demonstrated the feasibility of circulating tumor DNA as a surrogate to reveal tumor mutation status in lung cancer patients and a few researches have shown the potential ability of using circulating tumor DNA in surveillance. However, no study focused on the value of methylation status of circulating tumor DNA in the surveillance and no strict prospective study has been performed in surgical lung cancer patients. The investigators plan to analyze the dynamic change of circulating tumor DNA and its methylation status longitudinally from preoperation to long term follow-up in surgical lung cancer patients, and compare assessment value between circulating tumor DNA detection with methylation , traditional imaging examinations and traditional blood tumor markers in the monitoring process.
Study Type
OBSERVATIONAL
Enrollment
200
Peking University People's Hospital
Beijing, Beijing Municipality, China
RECRUITINGCorrelation between patients' recurrence and quantitative detection of circulating tumor DNA (ctDNA) concentration, including the quantitative detection of ctDNA mutations and ctDNA aberrant methylation.
Time frame: 3 years
The concordance of ctDNA genomic and methylation status alterations detected in peripheral blood samples with those in matched tumor samples.
Concordance will be defined as matched ctDNA and tumor DNA has the same identified mutations (methylation status alterations) or has no mutation (methylation status alteration). Concordance rate (%) will be calculated by consistent patient number and total patient number.
Time frame: 1 year
The variation of aberrant methylated ctDNA concentration before surgery, 3 days after surgery and 1 month after surgery.
Time frame: 1 year
Correlation between disease free time and quantitative detection of ctDNA genomic alterations or methylation status alterations in patients who receives adjuvant therapy.
Time frame: 3 years
Leading time of tumor relapse detection by circulating tumor DNA and methylation status than traditional radiological methods.
Time frame: 3 years
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