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Pathophysiology/Complications

Optimal Dose of Candesartan for Renoprotection in Type 2 Diabetic Patients With Nephropathy

A double-blind randomized cross-over study

  1. Kasper Rossing, MD1,
  2. Per K. Christensen, MD1,
  3. Birgitte V. Hansen1,
  4. Bendix Carstensen1 and
  5. Hans-Henrik Parving, Prof., DMSC, MD12
  1. 1Steno Diabetes Center, Gentofte, Denmark
  2. 2Faculty of Health Science, University of Aarhus, Aarhus, Denmark
    Diabetes Care 2003 Jan; 26(1): 150-155. https://doi.org/10.2337/diacare.26.1.150
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    A double-blind randomized cross-over study

    Abstract

    OBJECTIVE—We evaluated the optimal dose of the angiotensin II receptor antagonist candesartan cilexetil for renoprotection as reflected by short-term changes in albuminuria in hypertensive type 2 diabetic patients with nephropathy.

    RESEARCH DESIGN AND METHODS—A total of 23 hypertensive patients with type 2 diabetes and nephropathy were enrolled in this double-blind randomized cross-over trial with four treatment periods, each lasting 2 months. Each patient received placebo and candesartan: 8, 16, and 32 mg daily in random order. Antihypertensive medication was discontinued before enrollment, except for long-acting furosemide, which all patients received throughout the study in median (range) doses of 40 (30–160) mg daily. End points were albuminuria (turbidimetry), 24-h blood pressure (BP) (Takeda-TM2420), and glomerular filtration rate (GFR) (51Cr-labeled EDTA plasma clearance technique).

    RESULTS—Values obtained during placebo treatment: albuminuria [geometric mean (95% CI)] 700 (486–1,007) mg/24-h, 24-h BP (mean ± SE) 147 ± 4/78 ± 2 mmHg, and GFR 84 ± 6 ml/min/1.73 m2. All three doses of candesartan significantly reduced albuminuria and 24-h BP compared with placebo. Mean (95% CI) reductions in albuminuria were 33% (21–43), 59% (52–65), and 52% (44–59) with increasing doses of candesartan. Albuminuria was reduced significantly more by the two highest doses than by the lowest dose (P < 0.01); 24-h systolic BP was reduced by 9 (2–16), 9 (2–16), and 13 (6–20) mmHg and 24-h diastolic BP was reduced by 5 (2–8), 4 (1–7), and 6 (3–9) mmHg with increasing doses of candesartan. There were no significant differences in the reductions in BP between the three doses. GFR was decreased by ∼6 ml/min/1.73 m2 by all three doses of candesartan (P < 0.05 versus placebo).

    CONCLUSIONS—The optimal dose of candesartan is 16 mg daily for renoprotection, as reflected by short-term reduction in albuminuria, in hypertensive type 2 diabetic patients with nephropathy.

    • AngII, angiotensin II
    • BP, blood pressure
    • ESRD, end-stage renal disease
    • GFR, glomerular filtration rate
    • RAS, renin-angiotensin system
    • RENAAL, Reduction of End Points in Type 2 Diabetes With the Angiotensin II Antagonist Losartan

    Footnotes

    • Address correspondence and reprint requests to Kasper Rossing, MD, Steno Diabetes Center, Niels Steensens Vej 2, 2820 Gentofte, Denmark. E-mail: krossing{at}dadlnet.dk.

      Received for publication 10 April 2002 and accepted in revised form 24 September 2002.

      H.-H.P. has received lecture fees from AstraZeneca.

      A table elsewhere in this issue shows conventional and Système International (SI) units and conversion factors for many substances.

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    Optimal Dose of Candesartan for Renoprotection in Type 2 Diabetic Patients With Nephropathy
    Kasper Rossing, Per K. Christensen, Birgitte V. Hansen, Bendix Carstensen, Hans-Henrik Parving
    Diabetes Care Jan 2003, 26 (1) 150-155; DOI: 10.2337/diacare.26.1.150

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    Optimal Dose of Candesartan for Renoprotection in Type 2 Diabetic Patients With Nephropathy
    Kasper Rossing, Per K. Christensen, Birgitte V. Hansen, Bendix Carstensen, Hans-Henrik Parving
    Diabetes Care Jan 2003, 26 (1) 150-155; DOI: 10.2337/diacare.26.1.150
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