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Updated: Dec 13, 2025

Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma
08:07

Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma

Published on: April 12, 2019

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The inhibition of microRNA-326 by SP1/HDAC1 contributes to proliferation and metastasis of osteosarcoma through

Jiang-Hu Huang1,2, Yang Xu1,2, Fei-Yue Lin1,2

  • 1Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China.

Journal of Cellular and Molecular Medicine
|August 4, 2020
PubMed

Insights

MicroRNA-326 (miR-326) suppresses osteosarcoma (OS) growth and metastasis. SP1/HDAC1 complex inhibits miR-326, promoting OS cell proliferation and spread.

Area of Science:

  • Oncology
  • Molecular Biology
  • Gene Regulation

Background:

  • Osteosarcoma (OS) is a bone cancer with limited treatment options for metastatic disease.
  • Identifying novel therapeutic targets for metastatic OS is crucial.

Purpose of the Study:

  • To investigate the role of MicroRNA-326 (miR-326) in osteosarcoma proliferation and metastasis.
  • To elucidate the regulatory mechanism of miR-326 in OS.

Main Methods:

  • Microarray assay to identify SP1-influenced miRNAs.
  • Cellular assays (MTT, EdU, wound-healing, invasion) for proliferation and invasion.
  • In vivo nude mice model for metastasis detection.
  • Chromatin immunoprecipitation (ChIP) and DNA-binding assays to study SP1/HDAC1 regulation of miR-326.

Main Results:

  • Human OS tissues exhibit low miR-326 and high SP1/HDAC1 expression.
  • SP1 recruits HDAC1 to the miR-326 promoter, inhibiting its transcription via histone deacetylation.
  • miR-326 deficiency promotes OS cell proliferation, invasion, and metastasis in vivo by activating the SMO/Hedgehog pathway.

Conclusions:

  • SP1/HDAC1 complex transcriptionally inhibits miR-326 in OS.
  • miR-326 deficiency drives OS proliferation and metastasis through SMO/Hedgehog pathway activation.
  • Targeting the SP1/HDAC1/miR-326 axis may offer a therapeutic strategy for metastatic OS.
Keywords:
Sp1histone deacetylasemetastasismiR-326osteosarcoma

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