Clinical trial NCT04370860: Optimal EGFR TKIs Treatment Strategies for Lung Adenocarcinoma Harboring EGFR Exon 19 Deletion Variants
Official title: Determine the Optimal EGFR TKIs Treatment Strategies for Lung Adenocarcinoma Harboring EGFR Exon 19 Deletion Variants : the Clinical Analysis and Cell Lines Study
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: EGFR Exon 19 Mutation
Tumor Progression
Keywords: epidermal growth factor receptor tyrosine inhibitor
lung adenocarcinoma
Lead sponsor: National Taiwan University Hospital
Sponsor class: OTHER
First posted: 2020-05-01
Enrollment: 1000
Sex: ALL
Minimum age (years): 20
Maximum age (years): 90
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: CASE_ONLY
Time perspective: RETROSPECTIVE
Sampling method: PROBABILITY_SAMPLE
Study population: only citizens of Taiwan will be enrolled.

Brief summary: To determine the optimal EGFR TKIs treatment strategies for lung adenocarcinoma harboring EGFR exon 19 deletion variants

Detailed description: RNA extraction: The investigators will extract total RNA from cell lysates by using Tri-reagent (Molecular Research Center, Inc., Cincinnati, Ohio) and an RNA Mini Kit (Qiagen, Hilden, Germany) according to the manufacturer's instruction. RNA obtained from the Mini Kit column will be eluted. The quantity and quality of the purified RNA will be evaluated using a NanoDrop ND-1000 spectrophotometer will be stored at -80 °C for further mutational analyses.

Data acquisition: The investigators will record and follow participants' clinical information, including ethnicity, age, gender, smoking status, histological types, lung cancer stage (the TNM status), metastatic sites, ECOG score, CT/CXR imaging, chemotherapy or radiation treatment at the time of diagnosis of lung cancer and through the entire clinical courses. Specific marker such as TTF1, is used to ensure the diagnosis of primary lung tumor. Clinicopathologic stage assigns according to the seventh tumor-node-metastasis classification. The investigators assess the treatment responses according to the Response Evaluation Criteria in Solid Tumors (RECIST) using the unidimension method, and record the best response achieved per treatment. Treatment response, progression-free survival, and overall survival are recorded prospectively for further analysis.

Statistical analysis: All categorical variables will be analyzed with Pearson's χ² test, except where a small size required the use of Fisher's exact test. The progression-free survival curve and overall survival will be plotted by the Kaplan-Meier method and compared by the log-rank test. Multivariate analysis for overall survival will be performed using the Cox's proportional hazards model. Two-sided p-values of less than 0.05 is considered significant. All analyses will be performed using SPSS software (version 16.0 for Windows; SPSS Inc.).

Eligibility criteria: Inclusion Criteria:

* Patients have signed the informed consent (201103013RC and 201111039RIC) before 2019/12/31 and authorized the Institutional Review Board of Nation Taiwan University Hospital to review the new study for approving the usage of residual specimens.
* The residual samples from various sources, including surgical tissues, computed tomography (CT)-guided needle aspiration and/or biopsy, echo-guided needle aspiration and /or biopsy, bronchoscopic biopsy or brushing, bronchoalveolar lavage (BAL), endobronchial ultrasound guided needle aspiration, and lymph node aspiration, and pleural effusion specimens. The samples will be collected at the time of diagnostic procedure performed. All patients should sign an informed consent for purpose of using samples for molecular genetic testing.
* 1000 residual specimens will be used for the study.

Exclusion Criteria:

* Patients didn't sign the informed consent (201103013RC, 201111039RIC)
* The residual specimens are not qualified.

Primary outcomes:
measure: Tumor size measurement for evaluating tumor progression
timeFrame: "up to 5 years," "from date of treatment (EGFR TKIs) until the date of first documented progression
Secondary outcomes:
Other outcomes:
Locations:
city: Taipei City
country: Taiwan
facility: National Taiwan University Hospital
Study officials:
References: