- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02150694
Local Haemodynamic Effects of Apelin Agonists and Antagonists in Man in Vivo (HEAP)
Apelins are substances which occur naturally in the body, and have an important role in heart disease. They have been shown to make blood vessels dilate, and improve the way the heart works.
The investigators have devised 2 sets of experiments to investigate how the apelins affect blood vessels.
In the first group of experiments,the investigators will give healthy volunteers up to 3 different apelin substances, and use special research techniques to see how they affect the way that blood vessels work in the forearm.
In the second group of experiments, the apelins will be given along with another form of apelin which blocks the effects of apelin in laboratory experiments. The investigators want to see if it blocks the effects of apelin in healthy humans.
The investigators intend to test the hypothesis that:
Apelin agonists are vasodilators in human resistance vessels, this effect will be blocked by an apelin receptor antagonist.
This study will help us to understand more about how apelins work, and to suggest how they might be used to treat heart disease.
Study Overview
Status
Conditions
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
-
Cambridge, United Kingdom, CB2 0QQ
- Vascular Research Unit
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Between 18 and 70 years
- Non-regular smoking (<5 cigarettes per week)
- If female, postmenopausal or on days 2-9 of menstrual cycle
Exclusion Criteria:
- Hypertension (sustained BP >160/100mmHg)
- Ischaemic Heart Disease
- Renal, respiratory or neurological disease
- Diabetes mellitus
- BMI >30, BMI <18
- Pregnant
- Smoker
- Use of vasoactive medication or NSAIDS/aspirin within 48 hours of study.
- Current involvement in other research studies
Study Plan
How is the study designed?
Design Details
- Primary Purpose: BASIC_SCIENCE
- Allocation: RANDOMIZED
- Interventional Model: CROSSOVER
- Masking: NONE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Apelin agonist infusion
Studies to measure change in blood flow in response to apelin agonists (1/10/100nmol) using forearm venous occlusion plethysmography and Aellig hand vein technique.
|
Forearm venous occlusion plethysmography to study to measure forearm blood flow during intra-arterial infusion of the apelin peptides.
Hand vein measurements will be used to assess the response to apelin peptides and apelin receptor blocker in the human hand vein vascular bed.
Escalating doses of apelin (1/10/100nmol/min) will be administered.
|
Experimental: Apelin receptor antagonist infusion
Aellig hand vein technique will be used to investigate the change in vein diameter in response to an apelin blocking agent
|
Hand vein measurements will be used to assess the response to apelin peptides and apelin receptor blocker in the human hand vein vascular bed.
Dose finding study (range 1-300nmol/min) and co-infusion study with apelin peptides
|
Experimental: Apelin agonist/antagonist co-infusion
Forearm blood flow study to measure blood flow by forearm venous occlusion plethysmography following intraarterial infusion of apelin receptor agonists and antagonist.
|
Forearm venous occlusion plethysmography to study to measure forearm blood flow during intra-arterial infusion of the apelin peptides.
Escalating doses of apelin (1/10/100nmol/min) will be administered.
Dose finding study (range 1-300nmol/min) and co-infusion study with apelin peptides
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Forearm blood flow measured by forearm plethysmography in response to infused vasodilators
Time Frame: 2-3 hours
|
2-3 hours
|
Change in hand vein diameter measured by Aellig hand vein technique, in response to study peptides
Time Frame: 2-3 hours
|
2-3 hours
|
Collaborators and Investigators
Sponsor
Investigators
- Study Director: Ian B Wilkinson, FRCP DM, University of Cambridge
- Study Director: Anthony P Davenport, MA PhD, University of Cambridge
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- HEAP Study
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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