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January 1, 2005American Journal of HypertensionOpen Access

Combination of half doses of angiotensin type 1 receptor antagonist and angiotensin-converting enzyme inhibitor in diabetic nephropathy

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Key result

Switching to a combination of half-dose imidapril and candesartan significantly reduced the urinary albumin index from 79.4 to 52.5 mg/g Cre (P=0.003) in patients with type 2 diabetes.

Why the study?

Does combination therapy with half doses of ACEi and ARB reduce albuminuria in patients with type 2 diabetes and nephropathy compared to full-dose monotherapy?

Population

27 outpatients with type 2 diabetes mellitus and albuminuria (diabetic kidney disease)

Comparison

Combination of half doses of ACEi and ARB per… vs Prior monotherapy with full dose ACEi or ARB per…

Design

Cohort

Follow-up

3 months

Authors

TFTakao FujisawaHIH IkegamiMOMasaya Ono

Discussion

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Overview

Half-dose ACEi/ARB combination may reduce albuminuria independently of BP; leaves open superiority versus full-dose monotherapy in T2D nephropathy.

Key Points

  • To investigate whether combining half doses of an ACE inhibitor and an angiotensin receptor blocker provides renoprotective effects in type 2 diabetic patients with albuminuria.
  • Monitored 27 outpatients with type 2 diabetes mellitus with albuminuria who were initially receiving monotherapy of either 10 mg/day imidapril or 8 mg/day candesartan.
  • Switched participants from monotherapy to combination therapy consisting of 5 mg imidapril and 4 mg candesartan daily for 3 months.
  • Evaluated changes in urinary albumin index (UAI) and blood pressure from baseline to 3 months using paired t-tests.
  • Log-transformed urinary albumin index significantly decreased from a baseline of 79.4 (27.4–231) mg/g Cre to 52.5 (17.1–161) mg/g Cre after 3 months (P = 0.003).
  • Blood pressure measurements showed no statistically significant difference between baseline and the end of combination therapy.
  • Albuminuria reduction occurred independently of initial blood pressure, baseline urinary albumin index, blood pressure changes, or concurrent antihypertensive medications.

Structured PICO

Does combination therapy with half doses of ACEi and ARB reduce albuminuria in patients with type 2 diabetes and nephropathy compared to full-dose monotherapy?

P
Population
27 outpatients with type 2 diabetes mellitus and albuminuria, previously on ACEI or ARB monotherapy, followed for 3 months after switching to half-dose combination therapy.
I
Intervention
Combination of half doses of ACEi (imidapril 5 mg) and ARB (candesartan 4 mg) per day for 3 months
C
Comparator
Prior monotherapy with full dose ACEi (imidapril 10 mg) or ARB (candesartan 8 mg) per day
O
Outcome
Urinary albumin index (UAI) and blood pressure (BP)surrogate

Main Result

Absolute Event Rate: 52.5% vs 79.4%

p-value: p=0.003

Cite This Study

Fujisawa et al. (2005) studied Diabetic nephropathy (n=27). Combination of imidapril and candesartan vs. 10 mg imidapril or 8 mg candesartan per day (baseline) was evaluated on Urinary albumin index (UAI) (p=0.003). Switching to a combination of half-dose imidapril and candesartan significantly reduced the urinary albumin index from 79.4 to 52.5 mg/g Cre (P=0.003) in patients with type 2 diabetes.

synapsesocial.com/papers/6a659eb7f3bdf71dcbd69ff8https://doi.org/10.1016/j.amjhyper.2004.08.001
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Renoprotective Effects of Adding Angiotensin II Receptor Blocker to Maximal Recommended Doses of ACE Inhibitor in Diabetic Nephropathy2003 · 227 citations
  2. 2Additive Effect of ACE Inhibition and Angiotensin II Receptor Blockade in Type I Diabetic Patients with Diabetic Nephropathy2003 · 209 citations
  3. 3Dual Blockade of the Renin-Angiotensin System in Diabetic Nephropathy2002 · 205 citations
  4. 4Combination ACE Inhibitor and Angiotensin II Receptor Antagonist Therapy in Diabetic Nephropathy1999 · 105 citations
  5. 5Angiotensin-Converting Enzyme Inhibition Potentiates Angiotensin II Type 1 Receptor Effects on Renal Bradykinin and cGMP2001 · 65 citations