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Assays for Validating Histone Acetyltransferase Inhibitors
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Assays for Validating Histone Acetyltransferase Inhibitors

Published on: August 6, 2020

Histone deacetylase inhibitors promote osteoblast maturation

Tania M Schroeder1, Jennifer J Westendorf

  • 1Graduate Program in Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, USA.

Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research
|November 19, 2005
PubMed
Abstract

Insights

Histone deacetylase inhibitors (HDIs) promote osteoblast maturation and bone formation by enhancing Runx2 activity. These findings suggest HDIs may treat bone loss diseases like osteoporosis and cancer.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Histone deacetylase inhibitors (HDIs) are investigated as anticancer agents and for neurological disorders.
  • HDIs effects on osteoblasts and bone formation are not well understood.
  • This study investigates HDI impact on osteoblast proliferation and differentiation.

Purpose of the Study:

  • To investigate the effect of histone deacetylase inhibition on osteoblast proliferation and differentiation.
  • To determine if HDIs can promote osteoblast maturation.
  • To explore the potential of HDIs as bone anabolic agents.

Main Methods:

  • MC3T3-E1 cells, primary osteoblasts, and calvarial organ cultures were treated with HDIs (TSA, NaB, VPA, MS-275).
  • Assessed cell proliferation, viability, cell cycle, Runx2 activity, alkaline phosphatase, and matrix mineralization.
  • Quantitative PCR measured osteoblast gene expression in response to TSA.

Main Results:

  • HDIs increased osteoblast proliferation and viability without altering cell cycle.
  • HDIs enhanced Runx2 transcriptional activity.
  • TSA accelerated alkaline phosphatase production, matrix mineralization, and expression of key osteoblast genes.

Conclusions:

  • Histone deacetylase activity regulates osteoblast differentiation and bone formation via Runx2.
  • HDIs show potential as bone anabolic agents.
  • HDIs may be useful in treating bone loss conditions like osteoporosis and cancer.

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