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Updated: Jul 15, 2026

A Semi-Automated and Reproducible Biological-Based Method to Quantify Calcium Deposition In Vitro
Published on: June 2, 2022
[Kidney as a regulating organ for calcium and phosphate homeostasis]
Hirokazu Honda1, Nozomu Hosaka, Tadao Akizawa
1Showa University School of Medicine, Department of Nephrology, Japan.
Abstract:
Kidney is a central effector organ on calcium (Ca) and phosphate (P) homeostasis. Their homeostasis are mainly preserved by renal reabsorption and excretion, which often regulated through common hormonal signals, parathyroid hormone (PTH), vitamin D, and calcitonin. The hormones also involves phosphatonins as a circulating factor with potent phosphaturic activity and the key phosphatonin appears to be a fibroblast growth factor (FGF) 23. FGF23 is associated with vitamin D metabolism as well as tubular phosphate excretion. Moreover, recent study using animal models revealed the task of klotho protein, which gene functions as an aging-suppressor gene, for the regulation of FGF23 signaling, Ca(2+) absorption and vitamin D modulation in the kidney.
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