This study aims to evaluate the use of Next Generation Sequencing (NGS) to detect circulating tumor DNA in gastric cancer patients after gastrectomy
Gastric cancer is the fourth most common cancer in Vietnam with high mortality rate. Patients at early stages undergo radical gastrectomy with curative intent, but the remaining tumor cells, termed as minimal residual disease (MRD), can later cause relapse. Conventional methods to monitor MRD such as imaging and blood tests for biomarkers such as CEA are not sensitive and specific enough. ctDNA has recently emerged as a promising noninvasive marker with high accuracy to monitor MRD and detect relapse in many cancers such as breast and colorectal cancers. However, its application in gastric cancer has not been extensively evaluated. Therefore, this study aims to use advanced NGS technologies to detect ctDNA in liquid biopsy as a biomarker to monitor MRD after radical gastrectomy.
Study Type
OBSERVATIONAL
Enrollment
100
The blood samples for ctDNA and other tumor markers will be first collected within 14 days before surgery, and then be tested after gastrectomy in scheduled interval
University Medical Center Ho Chi Minh City
Ho Chi Minh City, Vietnam
The sensitivity of MRD detection using ctDNA as the biomarker
The percentage of positive ctDNA detection among participants who experience disease recurrence or metastasis
Time frame: 2 years after surgery
The specificity of MRD detection using ctDNA as the biomarker
The percentage of positive ctDNA detection among participants who do not experience disease recurrence or metastasis
Time frame: 2 years after surgery
Leading time between ctDNA detection and cancer recurrence detected by conventional methods
Time is measured between first positive ctDNA detection and first cancer recurrence detected by conventional methods
Time frame: 2 years after surgery
Mean ctDNA level (MTM/ml) of gastric cancer before operation
The mean ctDNA level in gastric cancer patients before operation
Time frame: Within 14 days before operation
Mutation profile of gastric cancer
Profiling of the most frequent gene mutations
Time frame: Within 14 days before operation
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