Increased Activity of a Renal Salt Transporter (ENaC) in Diabetic Kidney Disease
Study Details
Study Description
Brief Summary
The purpose of the study is to determine whether a diuretic drug called amiloride is capable of increasing renal salt excretion and thereby decrease blood pressure in diabetic patients with kidney disease. Our hypothesis states that amiloride is capable of reducing blood pressure in these patients and thus decrease the cardiovascular risk associated with diabetic kidney disease.
Condition or Disease | Intervention/Treatment | Phase |
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N/A |
Study Design
Arms and Interventions
Arm | Intervention/Treatment |
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Experimental: Nephropathy Diabetics with diabetic nephropathy receiving first a standardized salt diet (200 mmol NaCl/day) for 4 days and then amiloride tablet 20 mg two times daily (morning and afternoon) for 2 days. |
Dietary Supplement: Standardized salt diet
200 mmol NaCl per day given as three meals daily for 4 consecutive days.
Drug: Amiloride
Amiloride tablet 20 mg two times daily (morning and afternoon) for two consecutive days.
Other Names:
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Experimental: Control Diabetics without nephropathy receiving a standardized salt diet (200 mmol NaCl/day) for 4 days, then amiloride tablet 20 mg two times daily (morning and afternoon) for 2 days. |
Dietary Supplement: Standardized salt diet
200 mmol NaCl per day given as three meals daily for 4 consecutive days.
Drug: Amiloride
Amiloride tablet 20 mg two times daily (morning and afternoon) for two consecutive days.
Other Names:
|
Outcome Measures
Primary Outcome Measures
- 24-hour urinary sodium excretion induced by amiloride [Change from baseline urinary sodium excretion at 24 hours after amiloride administration]
Secondary Outcome Measures
- Office blood pressure measurements [Change from baseline office blood pressure at day 4 of salt diet and at 24 hours after amiloride administration]
Eligibility Criteria
Criteria
Inclusion Criteria:
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Type 1 diabetes
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Negative pregnancy test at inclusion and taking contraceptive medication
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One group with diabetic nephropathy and overt proteinuria
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One normoalbuminuric group without nephropathy
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Creatinine clearance > 40 ml/min
Exclusion Criteria:
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Type 2 diabetes
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Receiving amiloride, glucocorticoids, aldosterone or spironolactone
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Clinically relevant organic or systemic disease including malignancy
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
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1 | Cardiovascular and Renal Research | Odense | Denmark | DK-5000 |
Sponsors and Collaborators
- University of Southern Denmark
- Odense University Hospital
- Region of Southern Denmark
- The Ministry of Science, Technology and Innovation, Denmark
- Danish Heart Foundation
Investigators
- Principal Investigator: Henrik Andersen, MD, University of Southern Denmark
- Study Director: Jan Erik Henriksen, MD, PhD, Odense University Hospital
- Study Director: Claus Bistrup, MD, PhD, Odense University Hospital
- Study Director: Boye L Jensen, MD, PhD, University of Southern Denmark
Study Documents (Full-Text)
None provided.More Information
Publications
- Buhl KB, Friis UG, Svenningsen P, Gulaveerasingam A, Ovesen P, Frederiksen-Møller B, Jespersen B, Bistrup C, Jensen BL. Urinary plasmin activates collecting duct ENaC current in preeclampsia. Hypertension. 2012 Nov;60(5):1346-51. doi: 10.1161/HYPERTENSIONAHA.112.198879. Epub 2012 Sep 17.
- Saha C, Eckert GJ, Ambrosius WT, Chun TY, Wagner MA, Zhao Q, Pratt JH. Improvement in blood pressure with inhibition of the epithelial sodium channel in blacks with hypertension. Hypertension. 2005 Sep;46(3):481-7. Epub 2005 Aug 22. Review.
- Svenningsen P, Bistrup C, Friis UG, Bertog M, Haerteis S, Krueger B, Stubbe J, Jensen ON, Thiesson HC, Uhrenholt TR, Jespersen B, Jensen BL, Korbmacher C, Skøtt O. Plasmin in nephrotic urine activates the epithelial sodium channel. J Am Soc Nephrol. 2009 Feb;20(2):299-310. doi: 10.1681/ASN.2008040364. Epub 2008 Dec 10.
- Svenningsen P, Uhrenholt TR, Palarasah Y, Skjødt K, Jensen BL, Skøtt O. Prostasin-dependent activation of epithelial Na+ channels by low plasmin concentrations. Am J Physiol Regul Integr Comp Physiol. 2009 Dec;297(6):R1733-41. doi: 10.1152/ajpregu.00321.2009. Epub 2009 Sep 30.
- 2013-052
- 13-04-R94-A4513-22770