Hereditary Pancreatitis Amlodipine Trial(H-PAT): A Pilot Study
试验速览
- 阶段
- 1 期
- 状态
- 已完成
- 入组人数
- 8
- 试验地点
- 2
- 主要终点
- safety of amlodipine: side effects, biochemistry, BP
研究概览
简要总结
This pilot study is a feasibility, safety, and preliminary benefits study to look at whether giving the calcium channel blocker amlodipine to people with hereditary pancreatitis as a prophylactic measure can reduce the inflammatory process in the pancreas.
详细描述
Hereditary Pancreatitis is a rare, autosomal dominantly inherited condition causing mutations in the cationic trypsinogen gene. These mutations lead to excessive activation of trypsinogen within the pancreatic acinar cells and subsequent pancreatic inflammation. Clinically, this may be observed as recurrent acute pancreatitis, chronic pancreatitis, and eventual complications of exocrine and endocrine pancreatic insufficiencies and pancreatic adenocarcinoma. Currently, there are no specific treatment or prophylactic measures for this condition.
Calcium is the physiologic switch to activate trypsinogen. It has recently been found that the mutation sites affect how tightly calcium binds to trypsinogen, with mutations leading to excessive calcium binding and subsequent excessive trypsinogen activation. This study is to obtain baseline data on whether the prophylactic use of a long-acting calcium channel blocker, amlodipine, would lead to decrease in the inappropriate activation of trypsinogen, and thereby decrease the subsequent pancreatic inflammation.
Up to 15 subjects, aged 6 years and above, with mutations in the cationic trypsinogen gene (PRSS1) will be recruited and undergo a 16-week trial. This will include a one-month baseline symptoms assessment (daily symptoms diary) and blood pressure measurements (with an automated home blood pressure monitor). Subsequently, subjects will be placed on between 2.5 - 10 mg amlodipine po qd (with a weaning up and weaning down phase) for approximately 10 weeks. They will continue to fill out daily symptoms diary, blood pressure measurements (to ensure there are no decreases), fill out periodic quality of life questionnaires, and undergo periodic blood testing for routine biochemistry as well as more specialized testing for proteomics and other inflammatory cytokines analysis.
The study has three main purposes: to determine whether the use of amlodipine appears to be safe in this patient population, to determine how frequently and how best to follow subjects while they are taking the medication, and to determine whether there are any indications of potential benefits to the medication (whether by decreased symptoms frequency/ severity or by inflammatory cytokines analysis).
A subsequent larger study would be designed based on the above results.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 6 Years 至 —（Child, Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •mutation in cationic trypsinogen (PRSS1)gene
- •age 6 years and above
- •able to comply with study terms: taking daily oral medication, taking daily blood pressure, filling in daily symptoms diary, coming to all follow-up visits
- •having some symptoms of pain from pancreas
排除标准
- •combination of mutations in the 2 other loci associated with pancreatitis: Cystic fibrosis transmembrane regulator and serine protease inhibitor Kazal type 1 (having mutations in both genes)
- •pancreatic insufficiency (exocrine and endocrine)
- •already being on an antihypertensive medication
- •contraindication to taking amlodipine (allergic reaction, severe renal failure (creatinine > 3 mg/dL; hepatic dysfunction signified by INR > 1.5)
- •pregnancy or breastfeeding
- •systemic disease that the investigators feel would place patient at undue risk of being placed on amlodipine
- •newly-started (within past 3 months) pancreatic enzymes, acid blocking medication, antioxidants, or oral contraceptive medication
结局指标
主要结局
safety of amlodipine: side effects, biochemistry, BP
efficacy: symptoms diary, SF-36, cytokines analysis
次要结局
- feasibility: ease of obtaining patient symptoms information, whether subjects need to be followed up as frequently as designated in this pilot, whether doing regular laboratory tests changed management in any way (i.e. whether it was necessary)