Target intelligence / Profile preview

Systemic calcium ion pool

Molecular classification
Other
01

Overview

The "systemic calcium ion pool" refers collectively to all calcium ions distributed throughout an organism’s body, including those in blood plasma, interstitial fluids, and within cells. Calcium ions are tightly regulated due to their crucial roles in bone structure, neurotransmission, muscle contraction, blood coagulation, and cell signaling pathways. Nearly all calcium in the body is stored in bone (>99%), with a small fraction circulating or stored in tissue compartments. Circulating calcium exists in free (ionized), protein-bound, and complexed forms, and homeostasis involves hormonal regulation by parathyroid hormone, vitamin D, and calcitonin. Although dysregulation of systemic calcium has wide medical relevance, it is not correct to treat "systemic calcium ion pool" as a discrete molecular drug target such as a receptor or enzyme.

Other names
Systemic calciumExtracellular calcium poolCalcium ion pool
02

Mechanism of action

Modulation of calcium absorption, excretion, or cellular influx/efflux; Regulation by hormones (parathyroid hormone, calcitonin, vitamin D)

03

Biological functions

Bone mineralizationSignal transductionNeurotransmitter releaseMuscle contractionEnzyme cofactor activitiesMaintenance of membrane potential
04

Disease associations

Cardiovascular disease (e.g. arrhythmias in hypercalcemia)Neurodegenerative disease (excitotoxicity, hypocalcemic tetany)Bone disorders (osteoporosis, calcification)Other
05

Safety considerations

Hypercalcemia and related cardiac arrhythmias, neuromuscular symptomsHypocalcemia and tetany, muscle spasmsConfusion, weakness, bone problems
06

Interacting drugs

Calcium supplements

5 more in the full profile.

07

Biomarkers

Serum total calciumSerum ionized calciumParathyroid hormone levelVitamin D level

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