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Advantage of early initiation of aluminum hydroxide administration for the prevention of experimental progressive renal disease.

Aluminium hydroxide, a phosphate binder, is regarded as a strong candidate to halt the progression of chronic renal disease. In order to determine the most effective time to start treatment, aluminium hydroxide was administered either immediately (ADR-0w), or at 8 weeks (ADR-8w) or 16 weeks (ADR-16w) after repeated injection of Adriamycin (ADR) inducing glomerular sclerosis. In the aluminium hydroxide-untreated group the survival rate at the end of the experiment was 50%, while the early initiation of aluminium hydroxide (ADR-0w) resulted in a greater survival rate of 90%. Serum phosphate concentration and serum calcium-phosphate product were significantly less in the aluminium hydroxide groups (ADR-0w, 8w, 16w) than in the untreated group after week 20. Urinary protein excretion was significantly less in the ADR-0w and ADR-8w groups at week 12 or 16 compared to the aluminium hydroxide-untreated group. Blood urea nitrogen in the aluminium hydroxide groups was significantly less than that in the untreated group at week 34. Histological examination revealed that glomerular sclerosis was less severe in the ADR-0w and ADR-8w groups than in the aluminium hydroxide-untreated group, and glomerular hypertrophy was significantly decreased in the ADR-0w group. We conclude that early treatment with aluminium hydroxide was effective in preventing renal deterioration in focal glomerular sclerosis induced by Adriamycin.