A Randomized Trial of Intra-Portal Alone Versus Intra- and Extra-Portal Transplantation of Pancreatic Islets After Total Pancreatectomy for Chronic Pancreatitis
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 23
- 试验地点
- 2
- 主要终点
- Hemoglobin A1c levels
研究概览
简要总结
Randomized pilot trial of patients (n=30) undergoing Total Pancreatectomy and Islet AutoTransplant (TPIAT). Patients with islet harvest of greater than 5000 islet equivalents/kg body weight will be randomized to receive a portion of their islets into an omental pouch. For outcomes related to islet function, a group of normal volunteers (n=15) will be studied as a comparator group.
详细描述
Chronic pancreatitis affects as many as 1 in every 2,500 persons and is associated with incapacitating pain, frequent hospitalization and risk of narcotic dependence. This is a debilitating disease with limited treatment options; afflicted patients are often young or middle aged adults. The health and economic costs of pancreatitis are great. Nearly $300 million is spent on emergency department visits alone in the US each year. More than 90% of patients with chronic pancreatitis have been hospitalized, half use narcotic analgesics regularly, and one-fourth are on disability. The lifetime risk of diabetes mellitus is as high as 70%. This proposal addresses needs in two broad topic areas: pancreatitis, and diabetes. The investigators propose to investigate a new technique for implanting autologous pancreatic islet cells into patients undergoing surgery for acute recurrent or chronic pancreatitis in an effort to improve long-term diabetes control.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 68 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Scheduled for total pancreatectomy and IAT at U of MN. All patients who are approved for pancreatectomy and IAT at U of MN are reviewed by a multi-disciplinary committee including surgeons, gastroenterologists specializing in pancreatic disease, a pain specialist psychologist, and endocrinologist to confirm the diagnosis of chronic pancreatitis and candidate suitability for surgery.
- •Able to provide informed consent
排除标准
- •Pre-Existing diabetes mellitus fasting blood glucose>115mg/dl, or hemoglobin A1c level >6.0% because these are all evidence of inadequate beta-cello mass.
- •Use of any of the following treatments in the 30 days prior to enrollment: insulin, metformin, sulfonylureas, glinides, thiazolidinediones, GLP-1 agonists, DPP-4 inhibitors, or amylin.
- •ALT or AST>2.5 times the upper limit of normal (ULN). Bilirubin>ULN, unless due to benign diagnosis such as Gilbert's.
- •Any of the following hematologic abnormalities: server anemia (hemoglobin <10 g/dL), thrombocytopenia (<150/mm3), or neutropenia(<1.0 x 109/L).
- •Current use or expected use of oral or injected corticosteroids, or any mediation likely to affect glucose tolerance. However, use of hydrocortisone for physiologic replacement, or use of any topical, inhaled or intranasal glucocorticoid is permitted.
- •Current or expected use of any other immunosuppressive agent.
- •Known coagulopathy, or need for anticoagulant therapy preoperatively (coumadin, enoxaparin), or any history of pulmonary embolism.
- •For females, plans to become pregnant or unwillingness to use birth control for the study duration.
- •Inability to comply with the study protocol.
- •Untreated psychiatric illness that may interfere with ability to give informed consent, or other developmental delay or neurocognitive disorder that impairs with a patient's ability to consent on their own behalf.
- •Any other medical condition that , in the opinion of the investigator, may interfere wit the patient's ability to successfully and safely complete the trial.
结局指标
主要结局
Hemoglobin A1c levels
时间窗: 1 year
Measure of average glucose levels over last several weeks
Hypoglycemic episodes
时间窗: 1 year
All severe hypoglycemic events will be recorded. This is defined based on American Diabetes Association criteria as a hypoglycemic episode \<54 mg/dL or (if not measured) associated with prompt recovery upon administration of glucose in which a patient is mentally or physically incapacitated and requires assistance from another person to treat the hypoglycemia.
Mixed Meal Tolerance Test
时间窗: 1 year
Patient is given Boost HP (6cc/kg), ingested 5 minutes after t=0 blood draw. Blood is drawn every half hour for 2 hours.
Glucose potentiated arginine stimulation
时间窗: 1 year
Starting immediately after glucose tolerance test (time t=10 minutes), 20% dextrose will be infused to maintain a glucose \~230mg/dL until test is completed. Glucose levels are measured every 5 minutes to maintain glucose in the target range after 40 minutes of continuous 20% dextrose infusion, After 40 minutes of continuous D20% infusion, baseline samples for glucose, insulin, and C-peptide are drawn (three samples over 10 minutes), a bolus of 5 grams arginine is given (at time 55 minutes), and samples for glucose, insulin, and C-peptide are taken at 2, 3, 4, and 5 minutes after the arginine bolus.
Clavien-Dindo classification of surgical complications
时间窗: Within 30 days of surgery
Grades surgical complications based on the level of treatment necessary to treat the complication.
Continuous glucose monitoring
时间窗: 1 year
3 days of CGM monitoring at one year will be obtained for mean glucose,standard deviation, and percent of time in hypo- and hyperglycemia
Portal vein thrombosis
时间窗: Post operative day 4 or 5.
Portal vein thrombosis is associated with higher tissue volume infused into the portal vein and higher portal pressures and is assessed using abdominal ultrasound.
Intravenous Glucose tolerance test
时间窗: 1 year
Patients are given a bolus of 0.2mg/kg of dextrose at t=0. Blood samples will be drawn at t=-10,-5,-1,2,3,4,5,7 and 10 minutes
Hypoglycemic clamp
时间窗: 1 year
A stepped hypoglycemic clamp protocol with variable glucose infusion rates will be performed to achieve 45 min glucose plateaus at 70, 60, and 50 mg/dl.Glucagon responses will be calculated by subtracting the mean of the three baseline values observed prior to the clamp from glucagon levels observed at 70, 60, and 50 mg/dl glucose nadirs during the clamp
Insulin Use
时间窗: 1 year
calculated as units/kg/day, will be assessed from glucose and insulin diaries maintained by patients for 14 days, overlapping with day 90
Clarke score
时间窗: 1 year
is determined from eight questions characterizing the participant's exposure to episodes of moderate and severe hypoglycemia; it evaluates symptomatic responses to hypoglycemia. A score of 4 or greater suggests impaired awareness of hypoglycemia
次要结局
未报告次要终点