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[Updates on rickets and osteomalacia: biological function of osteocyte and FGF23/klotho system]

Norio Amizuka1, Tomoka Hasegawa, Muneteru Sasaki

  • 1Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Japan.

Clinical Calcium
|October 1, 2013
PubMed

Insights

Osteocytes produce FGF23, regulating phosphate and vitamin D levels. Their lacunar system

Area of Science:

  • Bone biology and mineral metabolism.
  • Renal physiology and endocrinology.

Background:

  • Osteocytes synthesize Fibroblast Growth Factor 23 (FGF23).
  • FGF23 interacts with FGFR1c/klotho in renal tubules.
  • This interaction regulates serum phosphate and 1α-hydroxylase activity.

Purpose of the Study:

  • To explore the role of osteocytes in mineral balance.
  • To investigate the potential osteolytic function of osteocytes.
  • To examine the relationship between osteocyte-lacunar canalicular system (OLCS) geometry and mineral homeostasis.

Main Methods:

  • Analysis of osteocyte function in mineral regulation.
  • Investigation of osteocyte-induced osteolysis.
  • Evaluation of OLCS organization in compact bone.

Main Results:

  • Osteocytes regulate systemic phosphate and vitamin D.
  • Evidence suggests osteocytes may induce osteolysis.
  • Well-organized OLCS in cortical bone correlates with efficient osteocytic function.

Conclusions:

  • Osteocytes play a crucial role in maintaining mineral balance.
  • OLCS geometry is linked to osteocytic regulation of mineral homeostasis.
  • Further research into osteocytic osteolysis is warranted.

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