Effect of Intact GLP-1 (7-36) and GLP-1 Metabolite (9-36) on Coronary and Peripheral Vascular Function in Adults
试验速览
- 阶段
- 4 期
- 状态
- 已完成
- 发起方
- 入组人数
- 25
- 试验地点
- 1
- 主要终点
- Coronary Flow Reserve
研究概览
简要总结
GLP-1 is an agent for treatment of type 2 diabetes and may have protective effects on the cardiovascular system. The mechanism is complex and there seems to be a dual function with intact GLP-1 (7-36), acting through the GLP-1 receptor, and the GLP-1 (9-36) metabolite acting independently of the GLP-1 receptor.
Coronary flow reserve (CFR) is the ratio of flow through the coronary arteries during stress to during rest and it reflects coronary microcirculation. Impaired CFR is a strong predictor of poor prognosis of cardiovascular disease.
The aim of the study is to investigate the acute effects of GLP-1 on coronary microcirculation and endothelial function in adults with obesity.
详细描述
Several studies have shown beneficial effects of glucagon-like-peptide-1 (GLP-1) on the cardiovascular system. Native GLP-1 is secreted from L-cells in the intestine as GLP-1(7-36) 1 but is rapidly metabolised by the ubiquitous enzyme dipeptidyl-peptidase-4 (DPP4) to the metabolite GLP-1(9-36). However, the physiological effect of GLP-1 on the cardiovascular system is complex and there seems to be a dual function with intact GLP-1 (7-36), acting through the GLP-1 receptor, and the GLP-1 (9-36) metabolite acting independently of the GLP-1 receptor.
The aim of the study is to investigate the acute effects of intact GLP-1 and GLP-1 metabolite on coronary microcirculation and endothelial function in adults.
Method 20 adults with obesity are recruited to a double-blind randomized cross-over study.
The first 10 included adults will receive 2½ hours infusion of intact GLP-1 (7-36) together with a DPP-IV inhibitor and 2½ hours infusion of saline, on two separate occasions. The infusions will be given in randomized order with a minimum of 24 hours washout period.
The next 10 included adults will receive 2½ hours infusion of GLP-1 (9-36) metabolite and 2½ hours infusion of saline. These will also be given in randomized order with a minimum of 24 hours washout period. Endothelial function and CFR will be measured before and after one, respectively two, hours of infusion.
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, Outcomes Assessor)
入排标准
- 年龄范围
- 35 Years 至 70 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Age 35-70 years
- •BMI > 25 kg/m
- •Central obesity (measured by waist circumference, defined as ≥ 94cm for men and ≥ 80 cm for women)
- •Non smokers (6 months abstinent is required)
- •Normal creatinine
- •For fertile women; negative pregnancy test and use of safe anticonception.
- •Speak and understand Danish or English
- •Mental ability to follow and understand the study
排除标准
- •Known Diabetes
- •Known hypertension (untreated hypertension ≤ 160/100 at inclusion is accepted)
- •Haemoglobin < 6.5 mmol/l
- •Allergy towards Januvia or Exenatide, Adenosin or Glycerylnitrate
- •Documented significant stenosis of the left anterior descending artery (LAD) at coronary angiography or CT-angiography or regional dysfunction documented during dipyridamol stress-echocardiography. If stress test at baseline shows significant stenosis the patient will be excluded from the study.
- •Pregnancy
- •Severe asthma
- •Active cancer, severe co-morbidity with limited life-expectancy, severe hepatic co-morbidity, chronic alcohol abuse, atrial fibrillation, chronic or previous acute pancreatitis, inflammatory bowel disease.
研究组 & 干预措施
GlucagonLikePeptide-1 (7-36)
GLP-1 (7-36) is diluted in saline and human serum albumin. Plasma levels of GLP-1 (7-36) are rapidly raised and then maintained stable with 5,91 pmol/kg/min (0-2 min) reduced to 2,53 pmol/kg/min (2-4 min) reduced to 2,34 pmol/kg/min (4-6 min) reduced to 2,2 pmol/kg/min (6-8 min) reduced to 2,02 pmol/kg/min (8-10 min) and then maintained stable for 2½ hours with 1.5 pmol/kg/min.
A DPP-IV inhibitor - Januvia 100 mg is given the evening before and ½ an hour before the infusion is started.
干预措施: Saline (Drug)
GlucagonLikePeptide-1 (9-36)
GLP-1 (9-36) is diluted in saline and human serum albumin. Plasma levels of GLP-1 (9-36) are rapidly raised and then maintained stable with 5,91 pmol/kg/min (0-2 min) reduced to 2,53 pmol/kg/min (2-4 min) reduced to 2,34 pmol/kg/min (4-6 min) reduced to 2,2 pmol/kg/min (6-8 min) reduced to 2,02 pmol/kg/min (8-10 min) and then maintained stable for 2½ hours with 1.5 pmol/kg/min
干预措施: Saline (Drug)
NaCl
Saline is infused with a flow rate of 240 ml/h for 10 min and then reduced to 86 ml/h for 2½ hours.
干预措施: GlucagonLikePeptide-1 (7-36) (Drug)
NaCl
Saline is infused with a flow rate of 240 ml/h for 10 min and then reduced to 86 ml/h for 2½ hours.
干预措施: GlucagonLikePeptide-1 (9-36) (Drug)
结局指标
主要结局
Coronary Flow Reserve
时间窗: At baseline and after 2 hours of infusion
Coronary flow reserve (CFR) reflects microvessel coronary function and is the ratio between echocardiographic measured coronary flow velocity in LAD during adenosine induced myocardial hyperaemia and rest. The outcome is measured at every infusion/intervention (4 times).
次要结局
- Endothelial function (Assessed by Flow Mediated Dilation)(At baseline and after 1 hour of infusion)
研究者
Mette Zander
MD, PhD
Bispebjerg Hospital