Warning: Undefined array key "mm" in /www/wwwroot/www.ai-bt.com/si.php on line 10 Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /www/wwwroot/www.ai-bt.com/si.php on line 10 The influence of hydroxyapatite and pyrophosphate on the formation product of calcium oxalate at different pHs.

Literature DB >> 2546312

The influence of hydroxyapatite and pyrophosphate on the formation product of calcium oxalate at different pHs.

Abstract

The nucleating effect of hydroxyapatite (HAP) and the inhibitory effect of pyrophosphate (PPi) on calcium oxalate crystallization have been studied at different pH's in solution metastabely supersaturated with respect to calcium oxalate but saturated with respect to HAP. Crystallization was monitored by a decrease of calcium in the supernatant and formation products were calculated. At a pH above 6.0 already minimal HAP concentrations proved to be a suitable substrate for heterogeneous nucleation and growth of calcium oxalate. PPi showed a pronounced inhibitory effect on spontaneous as well as on HAP induced crystallization of calcium oxalate, this effect being highly pH dependent. HAP was found to neutralize the inhibitory effect of PPi in a molar ratio of 10:1.

Entities: Chemical

Mesh：

Substances：

Year: 1989 PMID： 2546312 DOI： 10.1007/BF00256242

Source DB: PubMed Journal: Urol Res ISSN： 0300-5623

7 in total

1. Heterogeneous nucleation with urate, calcium phosphate and calcium oxalate.

Authors: C Y Pak; Y Hayashi; L H Arnold
Journal: Proc Soc Exp Biol Med Date: 1976-10

2. THE ORIGIN AND GROWTH OF RENAL CALCULI.

Authors: A Randall
Journal: Ann Surg Date: 1937-06 Impact factor: 12.969

3. The expectation of free and fixed particles in urinary stone disease.

Authors: B Finlayson; F Reid
Journal: Invest Urol Date: 1978-05

4. Epitaxial relationships in urolithiasis: the calcium oxalate monohydrate-hydroxyapatite system.

Authors: J L Meyer; J H Bergert; L H Smith
Journal: Clin Sci Mol Med Date: 1975-11

5. Long-term treatment of calcium nephrolithiasis with potassium citrate.

Authors: C Y Pak; C Fuller; K Sakhaee; G M Preminger; F Britton
Journal: J Urol Date: 1985-07 Impact factor: 7.450

6. Crystallization conditions in urine of patients with idiopathic recurrent calcium nephrolithiasis and with hyperparathyroidism.

Authors: J M Baumann; K Lauber; F X Lustenberger; M Wacker; E J Zingg
Journal: Urol Res Date: 1985

7. Epitaxial considerations in urinary stone formation. II. The oxalate-phosphate system.

Authors: P G Koutsoukos; M E Sheehan; G H Nancollas
Journal: Invest Urol Date: 1981-03

7 in total

8 in total

The influence of hydroxyapatite and pyrophosphate on the formation product of calcium oxalate at different pHs.

1. Heterogeneous nucleation with urate, calcium phosphate and calcium oxalate.

2. THE ORIGIN AND GROWTH OF RENAL CALCULI.

3. The expectation of free and fixed particles in urinary stone disease.

4. Epitaxial relationships in urolithiasis: the calcium oxalate monohydrate-hydroxyapatite system.

5. Long-term treatment of calcium nephrolithiasis with potassium citrate.

6. Crystallization conditions in urine of patients with idiopathic recurrent calcium nephrolithiasis and with hyperparathyroidism.

7. Epitaxial considerations in urinary stone formation. II. The oxalate-phosphate system.

1. Rapid method of measuring the inhibition of calcium-oxalate monohydrate growth in urine.

Review 2. Physico-chemical aspects of calcium stone formation.

3. Effects of urinary macromolecules on the crystallization of calcium oxalate.

4. The importance of crystallization processes in understanding of stone formation.

5. Factors modulating the pH at which calcium and magnesium phosphates precipitate from human urine.

Review 6. A hypothesis of calcium stone formation: an interpretation of stone research during the past decades.

7. Studies on the role of calcium phosphate in the process of calcium oxalate crystal formation.

8. An understanding of renal stone development in a mixed oxalate-phosphate system.