Role of Mineralocorticoid Receptor in Diabetic Cardiovascular Disease
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:
- spironolactone
- hydrochlorothiazide (HCTZ) plus potassium
- 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.
연구 개요
상태
연구 유형
등록 (실제)
단계
- 해당 없음
연락처 및 위치
연구 장소
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-
Massachusetts
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Boston, Massachusetts, 미국, 02115
- Brigham and Women's Hospital
-
-
참여기준
자격 기준
공부할 수 있는 나이
건강한 자원 봉사자를 받아들입니다
연구 대상 성별
설명
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.
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
- 주 목적: 치료
- 할당: 무작위
- 중재 모델: 병렬 할당
- 마스킹: 더블
무기와 개입
참가자 그룹 / 팔 |
개입 / 치료 |
|---|---|
|
위약 비교기: 위약 캡슐
|
Placebo capsule daily
|
|
실험적: Spironolactone (mineralocorticoid receptor [MR] blockade)
|
25 mg capsule daily for 6 months
|
|
활성 비교기: Hydrochlorothiazide + potassium
|
hydrochlorothiazide (HCTZ) + potassium, 12.5 mg/10 milliequivalents (mEq) capsule daily
|
연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
|
Change in Coronary Flow Reserve From Baseline to 6 Months
기간: 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
|
2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
|
Change in Mitral Annulus Velocities on Tissue Doppler (Delta E/e' Ratio), a Measure of Diastolic Function
기간: 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)
기간: 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
기간: 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
|
공동 작업자 및 조사자
수사관
- 수석 연구원: Gail K Adler, MD, PhD, Brigham and Women's Hospital
간행물 및 유용한 링크
일반 간행물
- Haas AV, Rosner BA, Kwong RY, Rao AD, Garg R, Di Carli MF, Adler GK. Sex Differences in Coronary Microvascular Function in Individuals With Type 2 Diabetes. Diabetes. 2019 Mar;68(3):631-636. doi: 10.2337/db18-0650. Epub 2018 Nov 8.
- Garg R, Rao AD, Baimas-George M, Hurwitz S, Foster C, Shah RV, Jerosch-Herold M, Kwong RY, Di Carli MF, Adler GK. Mineralocorticoid receptor blockade improves coronary microvascular function in individuals with type 2 diabetes. Diabetes. 2015 Jan;64(1):236-42. doi: 10.2337/db14-0670. Epub 2014 Aug 14.
연구 기록 날짜
연구 주요 날짜
연구 시작
기본 완료 (실제)
연구 완료 (실제)
연구 등록 날짜
최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (추정)
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
추가 관련 MeSH 약관
기타 연구 ID 번호
- 2007-P-000564
- 1R01HL087060-01A2 (미국 NIH 보조금/계약)
이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .
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