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Haemodynamic Effects of Apelin Agonists and Antagonists in Man in COPD With Raised Pulmonary Artery Pressures

23. juni 2015 opdateret af: Joseph Cheriyan, MD, Cambridge University Hospitals NHS Foundation Trust

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.

Studieoversigt

Detaljeret beskrivelse

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:

  1. Apelin agonists are vasodilators in human resistance vessels and this effect will be altered in patients with pulmonary hypertension.
  2. 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.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

20

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

      • Cambridge, Det Forenede Kongerige, CB2 0QQ
        • Vascular Research Unit, Clinical Pharmacology Unit, ACCI, Level 3, Addenbrooke's Hospital, Hills Road

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 70 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

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

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Forebyggelse
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: 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
Andre navne:
  • Ekkokardiografi
  • Innocor
  • Bioimpedans
Eksperimentel: 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

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Tidsramme
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.
Tidsramme: 12 months
12 months
Cardiac output and stroke volume, pulmonary vascular resistance, mean arterial pressure and heart rate.
Tidsramme: 12 months
12 months

Andre resultatmål

Resultatmål
Tidsramme
Exploratory endpoints in Study 2 are systolic and diastolic blood pressure.
Tidsramme: 12 months
12 months

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Efterforskere

  • Ledende efterforsker: Dr. Joseph Cheriyan, MD, Cambridge University Hospitals NHS Foundation Trust

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. juni 2014

Primær færdiggørelse (Faktiske)

1. december 2014

Studieafslutning (Faktiske)

1. december 2014

Datoer for studieregistrering

Først indsendt

28. april 2014

Først indsendt, der opfyldte QC-kriterier

30. april 2014

Først opslået (Skøn)

2. maj 2014

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

25. juni 2015

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

23. juni 2015

Sidst verificeret

1. januar 2015

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • ALPHa-COPD

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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