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Phosphate Ion Homeostasis

Molecular classification: Physiological Process

Overview

Phosphate ion homeostasis refers to any process involved in maintaining a steady internal state of phosphate ions within an organism or cell. This includes the regulation of both extracellular and intracellular phosphate concentrations to ensure proper physiological function. It is achieved through coordinated actions across several organs (intestine, kidneys, bone) and regulated by hormones like PTH, calcitriol, and FGF23, as well as sodium-phosphate cotransporters and cellular pathways like the PHO pathway. Disruption can lead to various disorders.

Biological functions

Maintenance of stable internal levels of inorganic phosphate ionsRegulation of dietary phosphate absorptionRegulation of renal reabsorption and excretion of phosphateStorage and release of phosphate from boneRegulation of gene expression related to phosphate import/export/storage/recycling

Disease associations

HypophosphatemiaHyperphosphatemiaBone disordersVascular calcificationDisorders of energy metabolismAcid-base imbalance

Safety considerations

Disruptions can lead to bone health issuesDisruptions can lead to energy metabolism issuesDisruptions can lead to acid-base status issuesDisruptions can lead to vascular calcification

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