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Role of Mineralocorticoid Receptor in Diabetic Cardiovascular Disease

19. maj 2017 opdateret af: Gail Kurr Adler, Brigham and Women's Hospital

Aldosterone is a significant mediator of cardiovascular injury associated with heart failure and the cardiovascular benefits of mineralocorticoid receptor blockade are additive to those of angiotensin converting enzyme inhibitors or angiotensin II (ANGII) receptor blockers. This study will test the hypothesis that mineralocorticoid receptor (MR) antagonists exert beneficial cardiovascular effects, specifically by decreasing vascular injury and improving vascular function. A randomized, double-blind study will be conducted, in which participants with Type 2 Diabetes Mellitus will undergo a series of assessments to test heart, blood vessel, and kidney function at baseline, and after 2 and 6 months of treatment with one of the following drugs:

  1. spironolactone
  2. hydrochlorothiazide (HCTZ) plus potassium
  3. placebo

In the event of insufficient funds, randomization to the placebo arm will be stopped and primary assessment of outcomes will occur at baseline and after 6 months of treatment.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

69

Fase

  • Ikke anvendelig

Kontakter og lokationer

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

Studiesteder

  • Forenede Stater
    • Massachusetts
      • Boston, Massachusetts, Forenede Stater, 02115
        • Brigham and Women's Hospital

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:

  • age 18-70 years
  • type 2 diabetes mellitus
  • with or without hypertension

Exclusion Criteria:

  • ischemic changes on resting electrocardiogram,
  • clinical evidence of heart disease (angina, heart failure, unstable angina),cerebrovascular or peripheral vascular disease,
  • significant cardiac arrhythmias,
  • aortic stenosis,
  • 2nd or 3rd degree atrio-ventricular block, sinus node disease, or symptomatic bradycardia,
  • bronchospastic lung disease with active wheezing,
  • known hypersensitivity to adenosine,
  • hemoglobin A1C (HbA1c) > 8.5%, *
  • gout (If not already taking HCTZ),
  • the use of Rosiglitazone,**
  • estimated glomerular filtration rate (eGFR) < 60 ml/min,
  • serum potassium > 5.0 mmol/L,
  • use of potassium-sparing diuretics,**
  • current smoker,*
  • pregnancy,
  • renal disease not related to diabetes mellitus,
  • uncontrolled hypertension, systolic blood pressure (BP) >160 mm Hg and diastolic BP >100 mm Hg,*
  • use of cyclic hormone replacement therapy
  • past intolerance of angiotensin-converting enzyme (ACE) inhibitor therapy
  • other major medical illnesses. Participants with evidence of a previous myocardial infarction on the first adenosine-stimulated positron emission tomography (PET) study will be withdrawn from the study.

  • Screening systolic blood pressure < 105 mm Hg off of anti-hypertensive medications

    • Participants can enroll in study and proceed with in-patient evaluations if during the run-in period adjustments of medications, diet and habits lead to improved glucose control [equivalent to HbA1c <8.5%, controlled hypertension and cessation of smoking.

      • Participants who are currently taking these medications will not qualify for a screening visit. If medications were recently stopped by the participant's physician, he or she may be screened but the baseline assessment protocol must occur 3 months after stopping.

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Dobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Placebo komparator: Placebo kapsel
Andet: Placebo
Placebo capsule daily
Eksperimentel: Spironolactone (mineralocorticoid receptor [MR] blockade)
Medicin: Spironolactone
25 mg capsule daily for 6 months
Aktiv komparator: Hydrochlorothiazide + potassium
Medicin: Hydrochlorothiazide + potassium
hydrochlorothiazide (HCTZ) + potassium, 12.5 mg/10 milliequivalents (mEq) capsule daily

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in Coronary Flow Reserve From Baseline to 6 Months
Tidsramme: Baseline and six months
Coronary flow reserve (CFR), or myocardial perfusion reserve, was assessed via cardiac positron emission tomography (PET). CFR is the ratio of adenosine-stimulated blood flow through myocardium to resting blood flow through myocardium. An improvement in coronary flow reserve is beneficial.
Baseline and six months

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in Mitral Annulus Velocities on Tissue Doppler (Delta E/e' Ratio), a Measure of Diastolic Function
Tidsramme: Baseline and six months
Diastolic function was assessed via tissue doppler imaging (TDI) by echocardiography to determine left ventricular diastolic function before and after 6 months of treatment.
Baseline and six months
Mitral Annulus Velocities on Tissue Doppler (Delta E/e' Ratio), a Measure of Diastolic Function (With Angiotensin II)
Tidsramme: Baseline and six months
Diastolic function was assessed via tissue doppler imaging (TDI) by echocardiography to determine left ventricular diastolic function before and after 6 months of treatment; and in response to acute administration (3 nanograms/kg/min for 60 min) of the vasoactive agent, Angiotensin II.
Baseline and six months
Change in Renal Plasma Flow
Tidsramme: Baseline and six months
Renal vasculature was assessed by examining renal plasma flow, or para-aminohippurate (PAH) clearance, basally and in response to acute administration (3 nanograms/kg/min for 60 min) of the vasoactive agent, Angiotensin II.
Baseline and six months

Samarbejdspartnere og efterforskere

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

Sponsor

Brigham and Women's Hospital

Samarbejdspartnere

National Heart, Lung, and Blood Institute (NHLBI)
National Institutes of Health (NIH)

Efterforskere

  • Ledende efterforsker: Gail K Adler, MD, PhD, Brigham and Women's Hospital

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

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. september 2008

Primær færdiggørelse (Faktiske)

1. august 2013

Studieafslutning (Faktiske)

1. maj 2014

Datoer for studieregistrering

Først indsendt

17. marts 2009

Først indsendt, der opfyldte QC-kriterier

18. marts 2009

Først opslået (Skøn)

19. marts 2009

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

14. juni 2017

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

19. maj 2017

Sidst verificeret

1. maj 2017

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 2007-P-000564
  • 1R01HL087060-01A2 (U.S. NIH-bevilling/kontrakt)

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 .

Kliniske forsøg med Type 2 diabetes mellitus

Kliniske forsøg med Spironolactone

Søg i lignende forsøg

Sponsorer og samarbejdspartnere

Medicinske tilstande

Narkotikainterventioner

CROs by country

CROs in Chile

Betingelser

Sjældne sygdomme

Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

Abonner