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Clinical Trial Technology Development for the Validation of Surrogate Prognostic Markers in Patients With Diabetic Nephropathy

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ClinicalTrials.gov Identifier: NCT01673204
Recruitment Status : Unknown
Verified February 2014 by Yon Su Kim, Seoul National University Hospital.
Recruitment status was:  Recruiting
First Posted : August 27, 2012
Last Update Posted : February 13, 2014
Information provided by (Responsible Party):
Yon Su Kim, Seoul National University Hospital

Brief Summary:

Worldwide, the most common cause of chronic kidney disease (CKD) and end stage renal disease (ESRD) is diabetes. Unlike the past, in south korea, diabetes account for more than 40% of ESRD. According to WHO reports in 1998, 100 million people had type 2 diabetes in 1997, and there is expected to increase by 300 million people in 2025. In addition, the expected survival time of patients with diabetes increase compared to previous. In the future, ESRD due to type 2 diabetes is expected to have a significant impact on the health industry. Therefore, prevention of progression to CKD and ESRD in diabetic patients is important to aspect of national health and economic problems. How to stop the progression of diabetic nephropathy is part of modern medicine to be solved.

Strict glycemic control, blood pressure regulation, and use of renin-angiotensin system (RAS) blockers inhibit the development and progression of diabetic nephropathy. Microalbuminuria in diabetic patients has been recognized as a predictor of progression of diabetic nephropathy. Thus, the prevention of elevated urinary albumin excretion is an important therapeutic target for the prevention of renal and cardiovascular events.

In patients with diabetes and hypertension, the drugs that block the RAS are used to treat proteinuria, but still a large number of patients with proteinuria are uncontrolled. In addition, ACE inhibitors or ARB agents actually have a limited effect on reducing the risk of cardiovascular or renal outcome. Also, sulodexide or pentoxyphylline which is reducing proteinuria have some weak evidence in terms of efficacy and safety. Therefore, the introduction of new alternative drugs are required.

Already several study reported that calcitriol or paricalcitol in the renal injury model have renopreventive effect. In addition, in diabetic renal injury mice model reported that vitamin D receptor deficiency leads to glomerulosclerosis. Inhibition of the RAS with combination of paricalcitol and RAS inhibitors effectively prevent renal injury in diabetic nephropathy. Recently, Dick de Zeeuw et al reported that addition of paricalcitol to RAS inhibition safely lower residual albuminuria in patients with diabetic nephropathy. Recent studies reported that elevated concentrations of serum markers of the TNFα and Fas-pathways are strongly associated with decreased renal function in diabetic patients. However, the role of these markers in early progressive renal function decline are not clear. Therefore, the objective of this study is to identify the renoprotective effect as an new treatment of activated vitamin D (Calcitriol) indicating the TNF-α-related anti-inflammatory action and to seek the role as an important biomarker that the changes of TNFR in diabetic nephropathy can predict response to treatment.

Condition or disease Intervention/treatment Phase
Diabetic Nephropathy Drug: Calcitriol Drug: Placebo Phase 4

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 276 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Screening
Study Start Date : October 2012
Estimated Primary Completion Date : April 2014

Resource links provided by the National Library of Medicine

Drug Information available for: Calcitriol

Arm Intervention/treatment
Experimental: Calcitriol
Drug: Calcitriol
dosage of 0.5mcg administered orally once daily for 12 month

Placebo Comparator: Placebo
Drug: Placebo

Primary Outcome Measures :
  1. Changes in renal function with proteinuria [ Time Frame: 12 month after administration ]
    Comparison of in GFR level from baseline Comparison of proteinuria amount checked by random urine protein/creatinine ratio

Secondary Outcome Measures :
  1. changes in sTNFR and TNF-related proteins [ Time Frame: 12 months after administration ]
    Comparison of serum TNFR1, TNFR2 levels from baseline

Information from the National Library of Medicine

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Ages Eligible for Study:   19 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • patients age 19-80 years
  • Clinically proven diabetic nephropathy
  • MDRD eGFR >= 30mL/min/1.73m2
  • Patients with residual urine protein/creatinine ratio >= 200mg/g
  • Adequate blood pressure control as treated systolic blood pressure <=140 or diastolic <=90 mmHg with RAS inhibitor for more than 3months
  • Serum intact PTH <500 mg/dL
  • Serum calcium <10.2 mg/dL
  • Patients who have not been treated vitamin D within the 3months prior to signing the informed consent form

Exclusion Criteria:

  • Patients age <19 years or > 80years
  • Patients with rapidly progressive glomerulonephritis
  • Patients requiring renal replacement therapy immediately
  • Hypercalcemia(Uncorrected serum calcium level >10.2 mg/dL) within recent 3month
  • Malignant hypertension
  • Heart failure (New York Heart Association functional class II to IV or LVEF <40%)
  • Severe chronic obstructive lung disease
  • Decompensated liver disease (ALT >3X upper normal limit)
  • Known allergy or hypersensitivity to vitamin D
  • Current treatment with steroids and/or immunosuppressive agents
  • Active primary malignancy requiring treatment or survival limits less than 2years
  • History of noncompliance to medical regimen
  • Inability to give an informed consent or to cooperate with researchers

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01673204

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Contact: Sumi Lee 82-2-2072-1724 promise131@hanmail.net

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Korea, Republic of
Seoul National University Hospital Recruiting
Seoul, Korea, Republic of, 110-744
Contact: Yonsu Kim, M.D., Ph.D    82-2-2072-2264    yonsukim@snu.ac.kr   
Contact: Dongki Kim, M.D., Ph.D    82-2-2072-2303    dkkim73@gmail.com   
Principal Investigator: Yonsu Kim, Ph.D.         
Sub-Investigator: Dongki Kim, M.D., Ph.D         
Sub-Investigator: Sumi Lee, M.D.         
Seoul National University Boramae Medical Center Not yet recruiting
Seoul, Korea, Republic of
Contact: Jungpyo Lee, M.D., Ph.D    82-2-870-2261    kjwa1@medimail.co.kr   
Sub-Investigator: Jungpyo Lee, M.D., Ph.D         
Sponsors and Collaborators
Seoul National University Hospital
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Study Chair: Yonsu Kim, M.D., Ph.D Seoul National University Hospital
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Responsible Party: Yon Su Kim, Professor, Seoul National University Hospital
ClinicalTrials.gov Identifier: NCT01673204    
Other Study ID Numbers: SNUH-TNFR
First Posted: August 27, 2012    Key Record Dates
Last Update Posted: February 13, 2014
Last Verified: February 2014
Keywords provided by Yon Su Kim, Seoul National University Hospital:
surrogate marker,
circulating soluble TNF receptor,
diabetic nephropathy
Additional relevant MeSH terms:
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Kidney Diseases
Diabetic Nephropathies
Urologic Diseases
Diabetes Complications
Diabetes Mellitus
Endocrine System Diseases
Calcium-Regulating Hormones and Agents
Physiological Effects of Drugs
Calcium Channel Agonists
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action
Vasoconstrictor Agents
Bone Density Conservation Agents