Maximal Dose of Angiotensin Converting Enzyme (ACE) Inhibitor for Treatment of Diabetic Kidney Disease
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Purpose
The primary aim is to evaluate the anti proteinuric effect of increasing doses of the ACE inhibitor, lisinopril: 20, 40 and 60 mg daily in type 1 diabetic patients with hypertension and diabetic nephropathy.
The secondary aim is to evaluate the effect on blood pressure (24 hour ambulatory blood pressure) and kidney function (glomerular filtration rate (GFR)).
The tertiary aim is to evaluate differences in response to treatment according to ACE/insertion/deletion (ID)-genotypes and other genetic variants in the genes of the renin angiotensin system.
| Condition | Intervention |
|---|---|
|
Diabetes Mellitus, Type I Diabetic Nephropathy |
Drug: Lisinopril |
| Study Type: | Interventional |
| Study Design: | Allocation: Randomized Endpoint Classification: Efficacy Study Intervention Model: Crossover Assignment Masking: Double-Blind Primary Purpose: Prevention |
| Official Title: | Optimal Dose of ACE Inhibitor for Treatment of Diabetic Nephropathy in Type 1 Diabetic Patients With Hypertension and Diabetic Nephropathy |
- albuminuria
- blood pressure (24 hour ambulatory) and GFR.
- Tertiary: differences in response to treatment in patients with different ACE/ID and other renin angiotensin system genotypes.
| Estimated Enrollment: | 60 |
| Study Start Date: | March 2005 |
| Estimated Study Completion Date: | September 2006 |
This is a randomized, double-blind cross-over study with three treatment periods consisting of 20, 40 and 60 mg lisinopril daily in random order. The endpoints of the study will be examined after each treatment period. There is no wash out between treatment periods. To minimize the risk of hypotension every treatment period starts with 20 mg lisinopril for two weeks. Thus, the risk of adverse effects is minimized and an increase in dose from 0 mg to 60 mg lisinopril is avoided.
The patients usual antihypertensive treatments will be stopped in a period of 8 weeks (wash out) before randomization. Since diuretic drugs will be needed by almost every patient in the study to avoid oedema all patients will be treated with lasix retard 60 – 120 mg daily.
Patients:
60 type 1 diabetic patients with diabetic nephropathy and hypertension (blood pressure > 135 mm Hg systolic and/or 85 mm Hg diastolic).
Methods:
The endpoints of the study will be examined at baseline and after each treatment period corresponding to 8, 16, and 24 weeks after randomization. The following parameters are determined after each treatment period: Albuminuria (determined from three consecutive 24 hours urine collections), kidney function (GFR – by plasma clearance of 51Cr-EDTA ), and 24 hour ambulatory blood pressure (TM-2420/2421). Furthermore, the concentrations of TGF-ß, sodium, creatinine, and carbamide in the 24 hour urinary samples are determined. The plasma concentration of albumin, renin, angiotensin II, and aldosterone is measured.
DNA is extracted from a blood sample and genetic variants in the renin-angiotensin system are measured including the ACE/ID genotype.
Endpoints:
Primary endpoint: albuminuria ; Secondary endpoints: blood pressure (24 hour ambulatory) and GFR; Tertiary: differences in response to treatment in patients with different ACE/ID and other renin angiotensin system genotypes.
Eligibility| Ages Eligible for Study: | 18 Years to 70 Years |
| Genders Eligible for Study: | Both |
| Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Type 1 diabetes (WHO criteria)
- Diabetic nephropathy (2 out of 3 consecutive 24 hour urinary samples with albumin excretion > 300 mg/24hour and diabetic retinopathy in the absence of signs of other kidney or urinary tract disease) 27 or diabetic glomerulosclerosis verified by biopsy.
- Hypertension: Blood pressure > 135 mmHg systolic and/or 85 mm Hg diastolic repeatedly.
- Age from 18 to 70 years.
Exclusion Criteria:
- Age < 18 years or > 70 years.
- Pregnancy or fertile women not using adequate anticonceptive (intrauterine device, sterilization, or oral anticonceptive)
- Malignant hypertension.
- Blood pressure > 180/105 mm Hg
- Known renal artery stenosis
- GFR < 30 ml/min/1.73 m²
- Serum potassium > 4.8 mmol/ l
- Heart failure, myocardial infarction, unstable angina or coronary bypass operation within the previous three months.
- Abuse of drugs or alcohol.
- Not able to understand the written information.
- Known intolerance to ACE inhibitors.
- Chronic use of non steroid inflammatory drugs or aspirin (above 1 g/day)
Contacts and Locations More Information
No publications provided by Steno Diabetes Center
Additional publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
| ClinicalTrials.gov Identifier: | NCT00118976 History of Changes |
| Other Study ID Numbers: | mace |
| Study First Received: | July 1, 2005 |
| Last Updated: | November 22, 2006 |
| Health Authority: | Denmark: National Board of Health |
Keywords provided by Steno Diabetes Center:
|
diabetic nephropathy type 1 diabetes albuminuria hypertension |
Additional relevant MeSH terms:
|
Diabetic Nephropathies Diabetes Mellitus Diabetes Mellitus, Type 1 Hypertension Kidney Diseases Glucose Metabolism Disorders Metabolic Diseases Endocrine System Diseases Autoimmune Diseases Immune System Diseases Urologic Diseases Diabetes Complications Vascular Diseases |
Cardiovascular Diseases Angiotensin-Converting Enzyme Inhibitors Lisinopril Protease Inhibitors Enzyme Inhibitors Molecular Mechanisms of Pharmacological Action Pharmacologic Actions Antihypertensive Agents Cardiovascular Agents Therapeutic Uses Cardiotonic Agents Protective Agents Physiological Effects of Drugs |
ClinicalTrials.gov processed this record on May 23, 2013