Effects of valsartan on the progression of chronic renal insufficiency in patients with nondiabetic renal diseases.
The present study tested the effects of valsartan, an angiotensin II receptor blocker, on the progression of renal insufficiency in patients with nondiabetic renal diseases. The study subjects were 22 patients with nondiabetic renal diseases whose serum creatinine (Cr) ranged from 1.5 to 3.0 mg/dl. Valsartan (40-80 mg) or placebo was given once daily for 1 year each in a random crossover manner. In both periods, antihypertensive medications were titrated when the blood pressure was not lower than 140/90 mmHg. Blood sampling and urinalysis were performed bimonthly throughout the study periods. The average blood pressure was comparable between the valsartan and the placebo periods (130 +/- 9/86 +/- 6 vs. 131 +/- 8/86 +/- 6 mmHg). Serum Cr significantly increased from 1.9 +/- 0.5 to 2.3 +/- 0.8 mg/dl (p < 0.001) during the placebo period, but the change was insignificant in the valsartan period (2.1 +/- 0.6 to 2.2 +/- 0.9 mg/dl). The slope of decrease in the reciprocal of serum Cr was steeper in the placebo period than in the valsartan period (-0.064 +/- 0.070/year vs. -0.005 +/- 0.050/year, p < 0.01). During the valsartan period, urinary protein excretion was less than that during the placebo period (0.75 +/- 0.73 vs. 1.24 +/- 0.92 g/g Cr, p < 0.001). Serum K was significantly higher in the valsartan period than in the placebo period (4.6 +/- 0.5 vs. 4.4 +/- 0.5 mEq/l, p < 0.05); however, no patients discontinued taking valsartan as a result of hyperkalemia. It is possible that long-term treatment with an angiotensin II receptor blocker, valsartan, is effective at retarding the deterioration of renal function in patients with nondiabetic renal disease by a mechanism independent of blood pressure reduction.
Ishimitsu
Toshihiko
T
Department of Hypertension and Cardiorenal Medicine, Dokkyo University School of Medicine, Mibu, Tochigi, Japan. isimitu@dokkyomed.ac.jp
Kameda
Tomoko
T
Akashiba
Akira
A
Takahashi
Toshiaki
T
Ando
Norikazu
N
Ohta
Satoshi
S
Yoshii
Masayoshi
M
Inada
Hideki
H
Tsukada
Kohju
K
Minami
Junichi
J
Ono
Hidehiko
H
Matsuoka
Hiroaki
H
D000328:Adult; D000368:Aged; D047228:Angiotensin II Type 1 Receptor Blockers / Q000627:therapeutic use*; D001794:Blood Pressure; D018592:Cross-Over Studies; D005260:Female; D005921:Glomerulonephritis / Q000097:blood / Q000188:drug therapy; D006801:Humans; D008875:Middle Aged; D009400:Nephrosclerosis / Q000097:blood / Q000188:drug therapy; D011507:Proteinuria / Q000188:drug therapy; D051436:Renal Insufficiency, Chronic / Q000097:blood / Q000188:drug therapy*; D013777:Tetrazoles / Q000627:therapeutic use*; D014633:Valine / Q000031:analogs & derivatives* / Q000627:therapeutic use; D000068756:Valsartan
D047228:Angiotensin II Type 1 Receptor Blockers; D013777:Tetrazoles; D000068756:Valsartan; D014633:Valine