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Ascorbic acid promotes osteoclastogenesis from embryonic stem cells.

Motokazu Tsuneto1, Hidetoshi Yamazaki, Miya Yoshino

  • 1Division of Immunology, Department of Molecular and Cellular Biology, School of Life Science, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8503, Japan. tsune13@grape.med.tottori-u.ac.jp

Biochemical and Biophysical Research Communications
|August 23, 2005
PubMed
Summary
This summary is machine-generated.

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Ascorbic acid (AA) significantly enhances osteoclastogenesis by promoting early-stage osteoclast precursor development. This vitamin, also known as Vitamin C, appears to increase specific cell populations crucial for bone remodeling.

Area of Science:

  • Cell Biology
  • Developmental Biology
  • Biochemistry

Background:

  • Ascorbic acid (AA) is recognized for its role in cell differentiation.
  • Its specific impact on osteoclastogenesis, particularly early developmental stages, requires further elucidation.

Purpose of the Study:

  • To investigate the comprehensive effects of ascorbic acid (AA) on osteoclast development.
  • To clarify the role of AA in the early stages of osteoclastogenesis using a novel culture system.

Main Methods:

  • Established a culture system to induce tartrate-resistant acid phosphate (TRAP)-positive osteoclasts from embryonic stem cells (ESCs) without stromal cell lines.
  • Administered AA during different phases of cell development and assessed TRAP-positive cell numbers.
  • Utilized magnetic cell sorting with anti-Flk-1 and anti-platelet-derived growth factor receptor alpha (PDGFR-α) antibodies to analyze cell populations.

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Main Results:

  • AA significantly increased the number of TRAP-positive osteoclasts compared to control conditions.
  • The addition of AA during the mesodermal cell development phase (days 1-4) showed a stronger effect than later addition (days 5-8).
  • AA increased total cell recovery and the frequency of osteoclast precursors, specifically enhancing Flk-1-positive cells, not PDGFR-α-positive cells.

Conclusions:

  • Ascorbic acid (AA) promotes osteoclastogenesis from ESCs, particularly during the early stages of mesodermal development.
  • AA appears to enhance osteoclastogenesis by increasing the population of Flk-1-positive cells, which are precursors to osteoclasts.
  • The findings highlight a novel role for AA in regulating bone remodeling processes through specific cell lineage modulation.