Stool Testing for Pancreatic Cancer
The purpose of this study is to determine if pancreatic cancer/pre-cancer can be detected in early stages through the molecular analysis of stool samples. Investigators hypothesize that analysis of stool samples using digital melt curve (DMC)analysis, can be used as a sensitive and specific method to detect the common genetic abnormalities present in pancreatic cancers and pre-cancerous lesions of the pancreas.
|Study Design:||Observational Model: Case Control
Time Perspective: Prospective
|Official Title:||Detection of Pancreatic Cancer and Pre-cancer by Stool DNA Testing: A Feasibility Study|
- Positive mutation rate in tumors/IPMN lesions vs. control [ Time Frame: 30 days ] [ Designated as safety issue: No ]The positive mutation rates in tumor or IPMN lesions and in matched controls will be assessed.
- Percentage of patients with genetic abnormalities correctly detected in stool samples [ Time Frame: 30 days ] [ Designated as safety issue: No ]Whether or not the genetic abnormalities that are detected in resected tissue can also be detected in stool specimens will be studied. If the hypothesis proves to be true, a new, non-invasive technique used in the detection of pre-cancerous lesions of the pancreas and pancreatic cancer will thereby be determined.
Biospecimen Retention: Samples With DNA
- Tissue Collection: Fresh frozen resected tumor and IPMN tissue will be obtained whenever possible. All resected specimens, cancer and IPMN, will have histologic review to confirm the diagnosis. Ten slices of 10 microns each from each specimen will be prepared and sent to Mayo Clinic on dry ice.
- Stool Collection: Prior to any surgery, stool will be collected from both study and control patients. Collection containers and mailing materials will be provided to subjects at time of their recruitment. Stool specimens will be mailed directly to Mayo Clinic within 48 hours of collection. Stool will be stored at 80 °C until assayed.
- Stool DNA extraction: After stool is homogenized, crude stool DNA will be extracted and purified.
- Digital melt curve mutation analysis: Target gene copies in captured stool DNA and tissue DNA will be quantified with real-time PCR. To target the mutations detected in tumor specimens, we will utilize PCR primers that scan for specific gene abnormalities.
|Study Start Date:||July 2009|
|Estimated Study Completion Date:||December 2016|
|Estimated Primary Completion Date:||December 2015 (Final data collection date for primary outcome measure)|
Individual who has not had pancreatic cancer/IPMN; surgical resection for lesion of pancreas; history of colorectal, gastric cancer, esophageal, or head-and-neck cancer; administration of chemotherapy less than 1 week prior to enrollment; or an endoscopic procedure conducted less than 1 week prior to enrollment.
Diagnosis of Pancreatic Cancer/IPMN
Patients diagnosed with Pancreatic Cancer/Intraductal Papillary Mucinous Neoplasm who are scheduled for surgical resection.
Pancreatic ductal adenocarcinoma (PDC) remains the fourth leading cause of cancer-related death in the U.S. This is largely due to the fact that most patients present with advanced, unresectable disease, highlighting the critical need for a screening test for this disease. Stool testing is an approach that has not been explored for use in PDC screening. With the advent of stool-based DNA tests, it may be possible to target genetic abnormalities that have been recently characterized n PDC tumorigenesis.
Aim: The aim of this study is to determine if DNA alterations present in pancreatic cancer and precancerous intrapapillary mucinous neoplasms (IPMN) can be reliably recovered in matched stool.
Methods: This is a case-control prospective study to determine the utility of a stool-based digital melt curve (DMC) assay in PDC screening. A total of 30 patients (18 with pancreatic cancer, 12 with IPMN) who will be undergoing pancreatic resection will be enrolled. Pancreatic neoplastic tissue will be isolated from their surgical specimens and the genes most commonly mutated in PDC will be sequenced from extracted DNA. In addition, hypermethylation at common promoter sites will be assessed by methylation-specific PCR. The genetic and epigenetic alterations isolated in pancreatic tissue will be utilized as the targets for stool DMC assay. Blinded technicians will process stool specimens from control patients as well as a matched control. The primary outcomes of this study will be the sensitivity and specificity of the stool DMC assay in detecting genetic mutations present in tumor or IPMN lesions.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01104129
|United States, New York|
|Columbia University Medical Center|
|New York, New York, United States, 10032|
|Principal Investigator:||Wendy K Chung, MD||Columbia University|