Diabetic Nephropathies
Conditions
Brief summary
Diabetic kidney disease (nephropathy) develops in nearly 40% of patients with type 2 diabetes mellitus. Diabetic nephropathy is caused by damage to the small blood vessels in the kidneys due to uncontrolled blood sugar levels, which mean that the kidneys become less effective at filtering urine. This is associated with albuminuria (protein in the urine). Treatment with some drugs reduces the loss of albumin through the urine and delays disease progression. There is increasing evidence that vitamin D could also be important in management of diabetic kidney disease. The aim of this study is to investigate the efficacy and safety of a combined regimen of calcitriol (active vitamin D) and established drugs for diabetic kidney disease.
Detailed description
The investigators propose to test the efficacy and safety of a combined regimen of calcitriol and angiotensin converting enzyme inhibitor (ACEI) or angiotensin receptor blocker (ARB) in type 2 diabetes subjects with albuminuria. In the proposed study, the bioactive form of vitamin D (calcitriol) is being used for its ability to synergize with ACEI or ARB and prevent renal disease progression. The study expands on preliminary studies demonstrating a reduction in proteinuria with vitamin D analogue treatment, in subjects with both diabetic as well as non-diabetic kidney disease.
Interventions
DRUGCalcitriol
Active vitamin D (Calcitriol) 0.25 micrograms
Sponsors
Weill Cornell Medical College in Qatar
Hamad Medical Corporation
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
No
Inclusion criteria
1. Age greater than or equal to 18 years and less than 80 years 2. Diagnosis of T2DM requiring treatment with at least one oral hypoglycaemic medication or insulin 2.1. Subjects will be considered to have established T2DM if the diagnosis of diabetes has been made and the subjects were treated with insulin or an oral hypoglycaemic agent for at least 6 months after diagnosis 2.2. Subjects will be considered to have newly established T2DM if the diagnosis of diabetes was diagnosed with a fasting plasma glucose ≥ 7 mmol/L (126 mg/dL) or haemoglobin A1c is \>6.5% in the past 6 months 3. Documented albuminuria defined as a presence of albuminuria on two occasions in the last six months: 3.1. Albumin ≥ 30 mg/24 hour in a 24 hour urine collection, or 3.2. Albumin ≥ 20 μg/min in a short-time urine collection, or 3.3. Albumin ≥ 30 mg/L in a spot urine sample, or 3.4. A spot-urine albumin-creatinine ration (ACR) ≥ 30 mg/g creatinine (≥ 2.5 mg/mmol creatinine in men, ≥ 3.5 mg/mmol creatinine in women) 4. Estimated glomerular filtration rate (eGFR) using the 4-variable Modification of Diet in Renal Disease (MDRD) equation of ≥ 25 mL/min/1.73 m2
Exclusion criteria
1. If female, positive pregnancy test or planning pregnancy in the subsequent 12 months 2. Pregnant 3. Breastfeeding 4. Corrected serum calcium ≥ 2.62 mmol/L 5. Serum Potassium \> 5.2 mmol/L if not on ACEI or ARB; Serum Potassium \> 6.0 mmol/L if on ACEI or ARB 6. 25-hydroxyvitamin D (25-OH Vit D) \> 80 ng/mL 7. PTH \> 200 pg/mL 8. Poorly controlled hypertension defined as systolic blood pressure ≥ 180 mm Hg or diastolic blood pressure ≥ 110 mm Hg 9. Systolic blood pressure (SBP) ≤ 110 mm Hg 10. History of kidney stones 11. History of severe chronic disease (e.g. chronic liver disease) 12. Active malignancy 13. Recent diagnosis of acute renal failure within 3 months of screening visit 14. Likelihood of renal replacement therapy within 1 year
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Urinary albumin creatinine ratio (ACR) measured biochemically | 26 weeks | Urine albumin and creatinine will be measured biochemically and their ratio calculated |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| 24-hour urine albumin (24h UA) excretion | 26 weeks | 24-hour urine albumin (24h UA) excretion measured biochemically |
| Estimated glomerular filtration rate (eGFR) | 26 weeks | Calculated using the Modification of Diet in Renal Disease (MDRD) equation |
| Blood pressure | 26 weeks | Blood pressure measured using a digital sphygmomanometer |
Other
| Measure | Time frame | Description |
|---|---|---|
| Patient Reported Outcome: Quality of life | 26 weeks | Measured using the EQ5D questionnaire |
Countries
Qatar
Contacts
Primary ContactShahrad Taheri, MB BS PhD
Backup ContactMuhammad Asim, MB BS
Outcome results
None listed