Biliary Tract Neoplasms, Gallbladder Cancer, Pancreatic Carcinoma, Pancreatic Head Carcinoma
Conditions
Keywords
diagnosis, follow-up
Brief summary
Chromosomal instability (CIN) refers to ongoing chromosome segregation errors throughout consecutive cell divisions. CIN is a hallmark of human cancer, and it is associated with poor prognosis, metastasis, and therapeutic resistance. Analyzing CIN of the DNA extracted from bile tract exfoliated cells in bile samples seems a promising method for diagnosing, monitoring, and predicting the prognosis of patients with malignant biliary obstruction, including biliary tract cancer (BTC), pancreatic head carcinoma. CIN can be assessed using experimental techniques such as bulk DNA sequencing, fluorescence in situ hybridization (FISH), or conventional karyotyping. However, these techniques are either time-consuming or non-specific. The investigators here intend to study whether a new method named Ultrasensitive Chromosomal Aneuploidy Detection (UCAD), which is based on low-coverage whole-genome sequencing, can be used to analyze CIN thus helping diagnose malignant biliary obstruction and assessing follow-up.
Detailed description
CIN results from errors in chromosome segregation during mitosis, leading to structural and numerical chromosomal abnormalities. It will generate genomic heterogeneity that acts as a substrate for natural selection. Furthermore, it is proved that tumors with aneuploidies and polyploidy resulting from whole-genome doubling are related to metastasis, treatment resistance, and decreased overall survival. It is estimated that 60%-80% of human tumors exhibit chromosomal abnormalities suggestive of CIN. CIN positively correlates with tumor stage and is enriched in relapsed as well as metastatic tumor specimens. Due to the ubiquity of CIN in cancer cells, it is a potentially non-invasive way to detect CIN in the bile tract exfoliated cells in bile samples for diagnosing and monitoring malignant biliary obstruction patients. UCAD is a new method to detect CIN in the DNA sample from patients, including extracting DNA from bile, analyzing DNA by low-coverage whole-genome sequencing, processing the data by bio-information techniques, and finally optimizing the management of malignant biliary obstruction patients. The investigators intended to conduct a prospective, single-blinded study by analyzing bile samples from malignant biliary obstruction patients and control groups without any tumor in the biliary system or other organs to compare the specificity and sensitivity of the UCAD test for diagnosing malignant biliary obstruction to other modalities, such as bile cytology. The investigators also intend to investigate the potential of UCAD in malignant biliary obstruction patient follow-up by analyzing the CIN level and following malignant biliary obstruction patients for up to 2 years to determine if there is a correlation between CIN level and patient prognosis
Interventions
DIAGNOSTIC_TESTThe level of CIN
The extracted DNA from bile will be analyzed by UCAD to determine the level of CIN. And the patient will be followed for up to 2 years.
Sponsors
Shanghai Zhongshan Hospital
Ruijin Hospital
Changhai Hospital
Shanghai Changzheng Hospital
Eastern Hepatobiliary Surgery Hospital
First Affiliated Hospital Xi'an Jiaotong University
Jiangsu Provincial People's Hospital
Third Affiliated Hospital, Sun Yat-Sen University
First Affiliated Hospital of Zhejiang University
The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School
Second Hospital of Jilin University
West China Hospital
Southwest Hospital, China
Affiliated Hospital of North Sichuan Medical College
Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University
Xinhua Hospital, Shanghai Jiao Tong University School of Medicine
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Patients diagnosed with malignant biliary obstruction and planned to undergo ERCP(endoscopic retrograde cholangiopancreatography), PTCS(percutaneous transhepatic cholangioscopy) or surgery. * Malignant biliary obstruction patients confirmed by operation or biopsy. * Participants without any tumor disease and willing to attend the study. * Male or female patients aged \>= 18 years. * Participants signed informed consent form.
Exclusion criteria
* Patients diagnosed with malignant biliary obstruction and planned to undergo ERCP, PTCS or surgery. * Malignant biliary obstruction patients confirmed by operation or biopsy. * Participants without any tumor disease and willing to attend the study. * Male or female patients aged \>= 18 years. * Participants signed informed consent form.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Sensitivity and Specificity of UCAD analysis | through study completion, an average of 30 months | number of patients declared positive with the UCAD test among the patients who suffered from malignant biliary obstruction and number of patients declared negative with the UCAD test among the patients without cancer |
| Assess the value of UCAD for malignant biliary obstruction patient follow-up | through study completion, an average of 30 months | Compare the CIN level with the patient information gathered by follow-up to determine whether there is a correlation between CIN level and patient prognosis , like PFS(progression-free survival), five-year survival rate. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Identification of the correlation between the level of CIN and the grade of the tumor sample | through study completion, an average of 30 months | level of CIN in the bile sample compared with the grade of the tumor confirmed by histopathologic examination, like Grade 1-4. |
| Identification of the correlation between the level of CIN and the stage of the tumor sample | through study completion, an average of 30 months | level of CIN in the bile sample compared with the TNM stage of the tumor confirmed by histopathologic examination, like Stage 0-IV. |
| Comparison of the sensitivity and specificity of the UCAD analysis versus bile cytology | through study completion, an average of 30 months | number of patients declared positive with the UCAD analysis versus patients declared positive with the bile cytology and number of patients declared negative with the UCAD analysis versus patients declared negative with the bile cytology |
Countries
China
Contacts
Primary ContactJiandong Wang, M.D., Ph.D.
Backup ContactTianyu Zhai, M.D., Ph.D.
Outcome results
None listed