Cell-free DNA Promoter Hypermethylation in Plasma From Patients With Pancreatic Adenocarcinoma, Compared to Patients With Pancreatitis and Pancreatitis and Patients Screened for, But Not Having Pancreatic Adenocarcinoma."
试验速览
- 阶段
- 不适用
- 入组人数
- 330
- 试验地点
- 1
- 主要终点
- Number of methylated genes for each participant.
研究概览
简要总结
The objectives of this project are to test whether alteration in DNA hypermethylation in plasma is:
- a diagnostic marker for pancreatic cancer
- a prognostic marker for pancreatic cancer
- a marker for recurrence of pancreatic cancer
- changing during the course of chronic pancreatitis, with the purpose of finding patients with high risk of developing pancreatic cancer
详细描述
Pancreatic cancer (PCa) is one of the most deadly cancers with a 5-year survival rate of less than 10 %. The majority of PCa are found to be none-resectable at the time of diagnosis. Only 10 - 20% of patients are offered surgical treatment, which is the only chance of cure. The mean survival times of none-resected patients are 3 to 6 months. Despite surgical treatment many patients experience recurrence. The high overall mortality is mainly caused by difficulties in early diagnosis due to unspecific/lack of symptoms in the early stages of the disease.
Patients with resectable tumors and no co-morbidity, have a 5-year survival rate up to 54 %. This indicates that early detection of the disease, which enables complete surgical resection of the tumor, is a way to improve survival. Chronic pancreatitis is one of the only known risk factors for PCa.
Currently there is no valid diagnostic marker for PCa. Diagnosis requires advanced methods and several of these are invasive and entail a risk of complications. A blood-based marker for pancreatic cancer would be a major achievement and of great benefit to the patients, and may even be used in screening.
During development of cancer changes in DNA arise, including DNA hypermethylation where a methyl residue is attached to the DNA. The methylation most frequently occurs in the regulatory region of the gene leading to inactivity. Some of the inactivated genes are necessary to ensure the control of cell growth. When these genes are inactivated, the cell will no longer be subject to normal control mechanisms and may eventually develop into a cancer cell.
Small amounts of DNA are released into the blood and can be detected in a blood sample. The DNA changes may be tumor specific and potentially useable as a marker for PCa. In 2012 our research unit in cooperation with Department of Molecular Diagnostic, Aalborg University Hospital published an optimized method for detection of hypermethylated DNA in plasma. The method has greatly improved sensitivity.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patients with chronic pancreatitis who are hospitalized or have an outpatient visit at Aalborg University Hospital Or
- •Patients hospitalized at Aalborg University Hospital, with acute pancreatitis verified by UL, CT or MR-scan and/or increased s-amylase
排除标准
- •Prior cancer history.
- •Anticoagulant therapy.
- •Immunological tissue disease.
结局指标
主要结局
Number of methylated genes for each participant.
时间窗: Time of diagnosis
We investigate the methylation status a of panel of 20 different genes in cell-free DNA in plasma. Plasma from patients with c. pancreas will be compared to plasma from patients in the control groups to se if DNA promoter hypermethylation can be used as a diagnostic marker for pancreas cancer.
次要结局
- Number of methylated genes for each participant related to prognosis(2 years follow up)
研究者
Ole Thorlacius-Ussing, MD, DMSc, Professor of Surgery
MD, DMSc, Consultant surgeant, Professor of Surgery
Aalborg University Hospital