Diabetic Nephropathy Clinical Trial
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.
n/a
Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Screening
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