Delineation of the Diabetogenic Role of Extrapancreatic Glucagon in Totally Pancreatectomised Patients Using Glucagon Receptor Antagonism
试验速览
- 阶段
- 不适用
- 发起方
- 入组人数
- 20
- 主要终点
- PPG excursions measured as incremental area under curve (iAUC)
研究概览
简要总结
Patients with diabetes are characterised not only by compromised insulin secretion and action, but also by elevated plasma levels of the 29-amino acid peptide hormone glucagon, which hitherto has been considered a pancreas-derived hormone (produced in and secreted from alpha cells in the islets of Langerhans). In patients with diabetes, circulating glucagon concentrations are elevated in the fasting state and fail to decrease appropriately or even increase in response to an oral glucose tolerance test (OGTT) or after ingestion of a mixed meal. Hyperglucagonaemia is known to be a potent stimulator of hepatic glucose output, and, thus, contributes significantly to the fasting and postprandial hyperglycaemia characterising patients with diabetes. Despite intense research over the years the mechanisms behind the elevated glucagon levels in diabetes is still not clear. Recently, the investigators showed that totally pancreatectomised patients also show a hyperglucagonaemic response during OGTT, a finding that suggests that the pancreas is not the only source of glucagon production in man.
In the present project, the investigators wish to evaluate the impact of gastrointestinally derived glucagon secretion observed in totally pancreatectomised patients on postprandial glucose tolerance.
The investigators hypothesise that antagonisation of glucagon signalling (from gastrointestinally derived glucagon) in totally pancreatectomised patients will improve or perhaps normalise the patients glucose tolerance during a 75g-OGTT. In order to test this hypothesis, the investigators wish to apply the potent and selective oral antagonist of the human glucagon receptor LY2409021 and placebo, respectively.
The study is a randomised, placebo-controlled, double-blinded, cross-over study.
10 healthy persons and 10 pancreatectomized patients (i.e. patients who have had their pancreata removed due to pancreatic cancer or severe chronic pancreatitis) will be subjected to two experimental days with LY2409021 and placebo, respectively, on which they will undergo an OGTT followed by a fasting period and finished off with an ad libitum meal.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Basic Science
- 盲法
- Double (Participant, Investigator)
入排标准
- 年龄范围
- 18 Years 至 80 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- 未提供
排除标准
- 未提供
研究组 & 干预措施
Healthy + placebo
During the experimental day the subject will undergo a 75gr-OGTT. On the evening before the experimental day, the subject will ingest placebo tablets.
干预措施: Placebo (Drug)
Pancreatectomised + LY2409021
During the experimental day the patient will undergo a 75gr-OGTT. On the evening before the experimental day, the patient will ingest a dose of 300mg of LY2409021.
干预措施: Glucagon receptor antagonist LY2409021 (Drug)
Pancreatectomised + placebo
During the experimental day the patient will undergo a 75gr-OGTT. On the evening before the experimental day, the patient will ingest placebo tablets.
干预措施: Placebo (Drug)
Healthy + LLY2409021
During the experimental day the subject will undergo a 75gr-OGTT. On the evening before the experimental day, the subject will ingest a dose of 300mg of LY2409021.
干预措施: Glucagon receptor antagonist LY2409021 (Drug)
结局指标
主要结局
PPG excursions measured as incremental area under curve (iAUC)
时间窗: -120,-45,-30,-15,0,5,10,15,20,25,30,40,50,60,70,80,90,105,120,135,150,180 minutes
次要结局
- differences in gastric emptying, measurement of s-paracetamol(-30,-15,0,5,10,15,20,25,30,40,50,60,70,80,90,105,120,135,150,180 minutes)
- food intake and appetite(at time 0,30,60,90,120,150,180 minutes)
- resting energy expenditure (REE)(-90,30,150 minutes)
- p-triglyceride mmol/l(-30,-15,0,5,10,15,20,25,30,40,50,60,70,80,90,105,120,135,150,180 minutes)
- cholecystokinin pmol/l(-30,-15,0,5,10,15,20,25,30,40,50,60,70,80,90,105,120,135,150,180 minutes)
- Amino Acid concentration μmol/l(-30,-15,0,5,10,15,20,25,30,40,50,60,70,80,90,105,120,135,150,180 minutes)
- p-glucose mmol/L(-30,-15,0,5,10,15,20,25,30,40,50,60,70,80,90,105,120,135,150,180 minutes)
- Gastric inhibitory peptide (GIP) and Glucagon like peptide-1 (GLP-1) pmol/l(-30,-15,0,5,10,15,20,25,30,40,50,60,70,80,90,105,120,135,150,180 minutes)
- glucagon pmol/l(-30,-15,0,5,10,15,20,25,30,40,50,60,70,80,90,105,120,135,150,180 minutes)
- free fatty acids μmol/l(-30,-15,0,5,10,15,20,25,30,40,50,60,70,80,90,105,120,135,150,180 minutes)
研究者
Filip Krag Knop
Professor
University Hospital, Gentofte, Copenhagen