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Phytate prevents tissue calcifications in female rats
F Grases1, R M Prieto, B M Simonet
1Laboratory of Renal Lithiasis Research, University of Balearic Islands, Palma de Mallorca, Spain. dqufgf0@ps.uib.es
Biofactors (Oxford, England)
|June 30, 2000
Summary
Phytate addition to purified rodent diets prevents kidney calcifications in female rats. The absence of phytate in the AIN-76 A diet is a key cause of renal calcification.
Area of Science:
- Nutritional science
- Toxicology
- Animal physiology
Background:
- Purified rodent diets, such as AIN-76 A, can induce kidney calcifications in female rats.
- Non-purified diets do not cause this effect, suggesting a protective dietary component.
- Phytate, an inhibitor of calcium salt crystallization, is largely absent in purified diets.
Purpose of the Study:
- To investigate the role of phytate in preventing renal calcification.
- To determine if adding phytate to the AIN-76 A diet mitigates kidney calcification in female rats.
Main Methods:
- Female Wistar rats were divided into three dietary groups: AIN-76 A, AIN-76 A + 1% phytate, and standard non-purified chow.
- Urinary phytate levels were measured.
- Kidney calcium and phosphorus concentrations were analyzed.
- Kidney tissue was examined for mineral deposits.
Main Results:
- Urinary phytate was undetectable in rats fed the AIN-76 A diet.
- Rats fed AIN-76 A + 1% phytate and standard chow had similar, elevated urinary phytate levels.
- Kidney calcium and phosphorus concentrations were significantly higher in the AIN-76 A group.
- Mineral deposits were observed exclusively in the kidneys of rats fed the AIN-76 A diet.
Conclusions:
- The absence of phytate in the AIN-76 A purified diet contributes to renal calcification in female rats.
- Dietary phytate supplementation can prevent kidney calcification induced by purified diets.
- Phytate is a crucial nutritional factor for preventing renal calcification in this rodent model.