- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01738945
Effect of Calcium Channel Blocker on the Serum Fibrobalst Growth Factor-23 (FGF-23) Levels in Type-2 Diabetic Patients With Proteinuria Purpose
In recent years, diabetic nephropathy, which may lead to dialysis treatment, is the most prevalent underlying disease of people in developed countries. A wide range of studies have been carried out, from various points of view, to understand the progress of renal dysfunction in diabetic nephropathy.
Fibroblast growth factor 23 (FGF-23) is a primary regulator of renal phosphate excretion. FGF23 is inversely associated with the GFR, a relationship underlying a fundamental mechanism for maintaining serum phosphate constancy during CKD progression. Such an adaptation may have deleterious trade-offs because, independently of serum phosphate, high FGF23 signals a high risk of death in ESRD patients. Some studies showed that there is relationship between FGF-23 levels and proteinuria in CKD patients.
There is no data about the effects of calcium channel blocker on FGF23 levels in diabetic patients with proteinuria. The aim of this study was to find out whether the beneficial effects of calcium channel blocker in diabetic proteinuria has any relation with the alteration of FGF-23 levels. The investigators searched for the effects of calcium channel blocker amlodipine on the clinical and laboratory parameters of diabetic patients with proteinuria.
The investigators registered the study 'The effect of renin angiotensin system Blockage (RAS), calcium channel blocker and combined drugs on TWEAK, PTX3 and FMD levels in Diabetic Proteinuric Patients with Hypertension' (ClinicalTrials.gov Identifier:NCT00921570). The investigators will use the samples of the some patients for this study. The investigators also registered the study 'FGF-23 and Endothelial Dysfunction in Diabetic Proteinuric Patients' (ClinicalTrials.gov Identifier: NCT01703234). The investigators will combine these two registered studies (NCT00921570 and NCT01703234) in one study.
Study Overview
Status
Intervention / Treatment
Detailed Description
The patients who were non-obese (BMI<30kg/m2), non dyslipidemic (total cholesterol <200mg/dl, Triglyceride<150mg/dl), and free of cardiovascular events (negative medical history, negative ECG findings) were investigated for enrollment. CKD stage 1 patients older than 18 years of age and willing to participate to the study were screened. From the 231 patients with established type 2 diabetes mellitus, 126 had proteinuria and/or hypertension (24 h protein excretion 1-2 g/day, systolic blood pressures ≥140mmHg and/or diastolic blood pressures ≥ 90 mmHg, respectively). All cases were first referrals and at the time of the study all were off treatment. Patients with history of coronary artery disease, smokers and those taking statins or renin-angiotensin blockers were excluded because of the effect of these factors on endothelial dysfunction. Of 61 screened patients 32 met the study criteria and were included in this study. The duration of proteinuria and diabetic nephropathy after initial diagnosis was not known.
The exclusion criteria were as follows: A)Nephrotic syndrome, B)coronary heart disease (patients with ischemic ST-T alterations and voltage criteria for LVH on electrocardiogram, and with history of revascularization or myocardial infarction), C) elevated liver enzymes (AST or ALT levels ≥ 40U/L) and D) renal failure (serum creatinine levels > 1.3 mg/dl). In order to evaluate the effect of calcium channel blocker on serum FGF-23 concentrations, patients with proteinuria were given an calcium channel blocker (Amlodipine 10 mg/day) for 12 weeks. The effect of calcium channel blocker on insulin sensitivity and proteinuria was also investigated.
After the intervention period, blood samples were obtained for assay of plasma PTX3 concentrations, HbA1c , and insulin resistance scores (HOMA-IR).
Urine samples were also collected over a 24-hour period to determine the degree of proteinuria.
Study Type
Enrollment (Actual)
Phase
- Phase 4
Contacts and Locations
Study Locations
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-
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Ankara, Turkey, 06018
- Gulhane School of Medicine
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-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- CKD stage 1 patients
- Older than 18 years of age
- Type 2 Diabetic patients
- Proteinuria
Exclusion Criteria:
- History of coronary artery disease
- Smokers
- Taking statins or renin-angiotensin blockers
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Other: Amlodipine
Amlodipine 10 mg/day for 12 weeks
|
10 mg/day for 12 weeks
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
---|
Fibroblast Growth factor 23
|
Secondary Outcome Measures
Outcome Measure |
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Flow mediated dilatation
|
Collaborators and Investigators
Sponsor
Publications and helpful links
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Urologic Diseases
- Urological Manifestations
- Urination Disorders
- Proteinuria
- Physiological Effects of Drugs
- Molecular Mechanisms of Pharmacological Action
- Antihypertensive Agents
- Vasodilator Agents
- Membrane Transport Modulators
- Calcium-Regulating Hormones and Agents
- Calcium Channel Blockers
- Amlodipine
Other Study ID Numbers
- GATACCBFGF23
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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