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Haemodynamic Effects of Apelin Agonists and Antagonists in Man in COPD With Raised Pulmonary Artery Pressures
Haemodynamic Effects of Apelin Agonists and Antagonists in Man in COPD With Raised Pulmonary Artery Pressures.
The investigators are interested in studying how Pulmonary Hypertension occurs. A substance called 'apelin', that naturally occurs in the body has been shown to have an important role in heart disease. Previous studies have shown that it can make blood vessels get wider, and help blood flow around the body and thus improve the way the heart and lungs work.
The investigators are looking to recruit both healthy and COPD pulmonary hypertension patients to study 3 types of apelin. The purpose of this study is to help the investigators understand how Pulmonary Hypertension occurs which may will help with the development of future treatments.
Studie Overzicht
Toestand
Conditie
Interventie / Behandeling
Gedetailleerde beschrijving
The purpose of this study:
To investigate the physiological role of apelin in the cardiovascular system in patients with COPD with raised pulmonary artery pressures.
Study Aim and hypotheses:
The primary objective is to test the above hypotheses using forearm blood flow and systemic infusions of apelin peptides.
Hypotheses:
- Apelin agonists are vasodilators in human resistance vessels and this effect will be altered in patients with pulmonary hypertension.
- Apelin peptides improve right ventricular and pulmonary haemodynamics in patients with elevated pulmonary artery pressures.
Study 1a - A validation dose study of 3 apelin agonists performed in healthy volunteers and COPD patients with elevated pulmonary artery pressures.
Study 1b- A validation dose study of apelin receptor antagonist, in healthy volunteers and COPD patients with elevated pulmonary artery pressures.
Study 2a - To define the haemodynamic response to apelin agonists in healthy volunteers and evaluate the response.
Study 2b - To investigate the haemodynamic response to 3 apelin agonists in COPD patients with elevated pulmonary artery pressures.
Studietype
Inschrijving (Werkelijk)
Fase
- Niet toepasbaar
Contacten en locaties
Studie Locaties
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Cambridge, Verenigd Koninkrijk, CB2 0QQ
- Vascular Research Unit, Clinical Pharmacology Unit, ACCI, Level 3, Addenbrooke's Hospital, Hills Road
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
Accepteert gezonde vrijwilligers
Geslachten die in aanmerking komen voor studie
Beschrijving
Inclusion Criteria:
Healthy volunteers
- Aged 18 to 70 years
- Non-smoker (<1 cigarette per week)
- If female, postmenopausal or on days 2-9 of menstrual cycle and negative pregnancy test COPD patients with estimated Pulmonary Artery Pressure (PAP) on echo >25mmHg
- Clinical diagnosis of COPD as per standard criteria
- Between 18 and 70 years
- If female, postmenopausal or on days 2-9 of menstrual cycle and negative pregnancy test
Exclusion Criteria:
pre-existing:
- Systemic Hypertension (sustained BP >160/100mmHg)
- Ischaemic Heart Disease
- Primary valvular heart disease
- Significant left ventricular failure
- Active malignancy
- Renal disease (Creatinine >180 µmol/L)
- Neurological disease
- Diabetes mellitus
- BMI >35, BMI <17
- Pregnancy
- Use of vasoactive medication or NSAIDS/aspirin within 48 hours of study.
- Current involvement in other research studies, other than observational/non-interventional
- Known HIV
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Preventie
- Toewijzing: Gerandomiseerd
- Interventioneel model: Parallelle opdracht
- Masker: Enkel
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
|---|---|
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Experimenteel: Systemic Apelin infusion
Study 2a - Haemodynamic studies to investigate the response to systemic infusions of 3 apelin agonists in healthy volunteers Study 2b - Haemodynamic studies to investigate the response to 3 apelin agonists in COPD patients with elevated pulmonary artery pressures |
Dose response study
Andere namen:
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Experimenteel: Apelin infusion - forearm
Study 1a - A validation dose study of 3 apelin agonists using forearm plethysmography to evaluate changes in forearm blood flow: performed in healthy volunteers and COPD patients with elevated pulmonary artery pressures. Study 1b- A validation dose study of apelin receptor antagonist using forearm plethysmography to evaluate changes in forearm blood flow, in healthy volunteers and COPD patients with elevated pulmonary artery pressures. |
Dose response study
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Tijdsspanne |
|---|---|
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Percentage change in forearm blood flow in the infused arm. Forearm blood flow ratio in each arm, blood pressure and heart rate will also be reported.
Tijdsspanne: 12 months
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12 months
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Cardiac output and stroke volume, pulmonary vascular resistance, mean arterial pressure and heart rate.
Tijdsspanne: 12 months
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12 months
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Andere uitkomstmaten
Uitkomstmaat |
Tijdsspanne |
|---|---|
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Exploratory endpoints in Study 2 are systolic and diastolic blood pressure.
Tijdsspanne: 12 months
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12 months
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Medewerkers en onderzoekers
Onderzoekers
- Hoofdonderzoeker: Dr. Joseph Cheriyan, MD, Cambridge University Hospitals NHS Foundation Trust
Studie record data
Bestudeer belangrijke data
Studie start
Primaire voltooiing (Werkelijk)
Studie voltooiing (Werkelijk)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Schatting)
Updates van studierecords
Laatste update geplaatst (Schatting)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
- ALPHa-COPD
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