The crystallization of calcium oxalate (CaOx) was determined in dialyzed urine samples collected between 0600 and 1000 hours from 18 normal men, 10 normal women and 13 men and 10 women with CaOx stone disease. Each urine samples was supersaturated by the addition of calcium chloride and sodium oxala
Urinary crystal surface binding substances on calcium oxalate crystals
โ Scribed by Koide, T. ;Yoshioka, T. ;Yamaguchi, S. ;Hosokawa, S. ;Utsunomiya, M. ;Sonoda, T.
- Publisher
- Springer
- Year
- 1990
- Tongue
- English
- Weight
- 639 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0300-5623
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โฆ Synopsis
In order to study the effect of urinary crystal surface binding substances (CSBS), we extracted the naturally existing CSBS from urine from healthy individuals by conducting homogeneous crystallization of calcium oxalate. CSBS proved not to be promoters but rather strong inhibitors of calcium oxalate crystal growth and aggregation. It is suggested that CSBS exhibited their inhibitory effect by masking the growing sites and aggregating sites on the crystal surface. As for the characteristics of CSBS, we found around 10 peaks of molecular weight, and all of them contained both peptides and saccharides. The findings suggest that CSBS are composed of various kinds of glycoproteins and proteoglycans.
๐ SIMILAR VOLUMES
The macromolecular fraction of urine with a molecular weight above 3,000 was isolated by dialysis. In the dialysed urine the rate of calcium oxalate (CaOx) crystallization was reduced both in the presence and absence of CaOx seed crystals. There was a clear relationship between crystallization and t
The nucleation-promoting and growth-inhibiting activities of urinary macromolecules on the crystallization of calcium oxalate endogenous in urine of stoneformers and normal controls were studied by freezing the ultrafiltrate and retenate fractions of concentrated whole urine (pH 5.3, 1,250 mosmol/kg