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  • Title: Effect of dietary calcium and magnesium on experimental renal tubular deposition of calcium oxalate crystal induced by ethylene glycol administration and its prevention with phytin and citrate.
    Author: Ebisuno S, Morimoto S, Yoshida T, Fukatani T, Yasukawa S, Ohkawa T.
    Journal: Urol Int; 1987; 42(5):330-7. PubMed ID: 3433579.
    Abstract:
    Oral administration of ethylene glycol to rats, and the resultant intratubular depositions of microcrystals of calcium oxalate were studied investigating the influences of dietary calcium or magnesium and assessing the protective efficacies against the crystallizations by treatment with phytin and sodium citrate. With increase of calcium intake and consequent increase of urinary calcium excretion there was a marked increase in the amount of tubular deposit of calcium oxalate crystal and in the calcium content of renal tissue. Although magnesium deficiency accelerated renal tubular calcium oxalate deposition, the protection against the crystal formation was not observed with excessive dietary magnesium. When rats were fed a high-calcium diet supplemented with phytin, a significant inhibition of the intratubular crystallization was observed. It appeared obvious that a hypocalciuric action of phytin was attributed to the effect of the prevention. There was vigorous protection of crystal formation by treatment with sodium citrate, which correlated with the level of citrate concentration in the drinking water.
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