The Effect of Tartrate upon the Calcium Oxalate Precipitated from Whole Urine After Rapid Evaporation

1984 ◽  
pp. 484-491 ◽  
Author(s):  
G. Alan Rose ◽  
P. C. Hallson
Keyword(s):  
Calcium Oxalate ◽  
Whole Urine

Magnesium Reduces Calcium Oxalate Crystal Formation in Human Whole Urine

1982 ◽  
Vol 62 (1) ◽  
pp. 17-19 ◽  
Author(s):  
P. C. Hallson ◽  
G. A. Rose ◽  
S. Sulaiman
Keyword(s):  
Calcium Oxalate ◽  
Inverse Correlation ◽  
Normal Volunteer ◽  
Urine Samples ◽  
Magnesium Concentration ◽  
Crystal Formation ◽  
Calcium Oxalate Crystal ◽  
Isotopic Methods ◽  
Whole Urine

1. A low urinary magnesium was induced in normal volunteer subjects by giving cellulose phosphate; magnesium was added in vitro to yield urine samples of normal and high magnesium concentrations 2. After rapid evaporation of these urine samples at pH 5.3 to standard osmolality the calcium oxalate crystals were measured by microscopy and isotopic methods 3. There was a clear inverse correlation between magnesium concentration and calcium oxalate crystal formation 4. The case for treating calcium oxalate urolithiasis with magnesium is strengthened.

Renal calcinosis and stone formation in mice lacking osteopontin, Tamm-Horsfall protein, or both

2007 ◽  
Vol 293 (6) ◽  
pp. F1935-F1943 ◽  
Author(s):  
Lan Mo ◽  
Lucy Liaw ◽  
Andrew P. Evan ◽  
Andre J. Sommer ◽  
John C. Lieske ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Calcium Oxalate ◽  
Stone Formation ◽  
Calcium Oxalate Monohydrate ◽  
Wild Type ◽  
Mineral Salts ◽  
Calcium Oxalate Crystallization ◽  
Whole Urine ◽  
Normal Urine

Although often supersaturated with mineral salts such as calcium phosphate and calcium oxalate, normal urine possesses an innate ability to keep them from forming harmful crystals. This inhibitory activity has been attributed to the presence of urinary macromolecules, although controversies abound regarding their role, or lack thereof, in preventing renal mineralization. Here, we show that 10% of the mice lacking osteopontin (OPN) and 14.3% of the mice lacking Tamm-Horsfall protein (THP) spontaneously form interstitial deposits of calcium phosphate within the renal papillae, events never seen in wild-type mice. Lack of both proteins causes renal crystallization in 39.3% of the double-null mice. Urinalysis revealed elevated concentrations of urine phosphorus and brushite (calcium phosphate) supersaturation in THP-null and OPN/THP-double null mice, suggesting that impaired phosphorus handling may be linked to interstitial papillary calcinosis in THP- but not in OPN-null mice. In contrast, experimentally induced hyperoxaluria provokes widespread intratubular calcium oxalate crystallization and stone formation in OPN/THP-double null mice, while completely sparing the wild-type controls. Whole urine from OPN-, THP-, or double-null mice all possessed a dramatically reduced ability to inhibit the adhesion of calcium oxalate monohydrate crystals to renal epithelial cells. These data establish OPN and THP as powerful and functionally synergistic inhibitors of calcium phosphate and calcium oxalate crystallization in vivo and suggest that defects in either molecule may contribute to renal calcinosis and stone formation, an exceedingly common condition that afflicts up to 12% males and 5% females.

scholarly journals STUDY ON METASTABLE LIMIT OF CALCIUM OXALATE IN WHOLE URINE USING AN AGGREGOMETER

1988 ◽  
Vol 79 (10) ◽  
pp. 1646-1652
Author(s):  
Shoichi Ebisuno ◽  
Toshihiko Yoshida ◽  
Shu Yasukawa ◽  
Toshiro Fukatani ◽  
Sigeki Minakata ◽  
...  
Keyword(s):  
Calcium Oxalate ◽  
Whole Urine

The oxalate-tolerance-value: A whole urine method to discriminate between calcium oxalate-stoneformers and others

1985 ◽  
Vol 13 (6) ◽  
Author(s):  
Th. Briellmann ◽  
F. Hering ◽  
H. Seiler ◽  
G. Rutishauser
Keyword(s):  
Calcium Oxalate ◽  
Whole Urine
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