Biological effects of inorganic phosphate: potential signal of toxicity

The Journal of Toxicological Sciences
Seong-Ho HongMyung-Haing Cho

Abstract

Inorganic phosphate (Pi) plays crucial roles in several biological processes and signaling pathways. Pi uptake is regulated by sodium-dependent phosphate (Na/Pi) transporters (NPTs). Moreover, Pi is used as a food additive in food items such as sausages, crackers, dairy products, and beverages. However, the high serum concentration of phosphate (> 5.5 mg/dL) can cause adverse renal effects, cardiovascular effects including vascular or valvular calcification, and stimulate bone resorption. In addition, Pi can also alter vital cellular signaling, related to cell growth and cap-dependent protein translation. Moreover, intake of dietary Pi, whether high (1.0%) or low (0.1%), affects organs in developing mice, and is related to tumorigenesis in mice. The recommended dietary allowance (RDA) of Pi is the daily dietary intake required to maintain levels above the lower limit of the range of normal serum Pi concentration (2.7 mg/dL) for most individuals (97-98%). Thus, adequate intake of Pi (RDA; 700 mg/day) and maintenance of normal Pi concentration (2.7-4.5 mg/dL) are important for health and prevention of diseases caused by inadequate Pi intake.

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Citations

Oct 7, 2017·International Journal of Environmental Research and Public Health·Gregor JerebIvan Eržen
Dec 14, 2018·Pflügers Archiv : European journal of physiology·Tiziano Verri, Andreas Werner
Oct 4, 2020·Nutrients·Juan Serna, Clemens Bergwitz
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Apr 15, 2018·Biomedicine & Pharmacotherapy = Biomédecine & Pharmacothérapie·Liguo LiuZhenqian Wu

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