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Updated: Jul 9, 2025

A RANKL-based Osteoclast Culture Assay of Mouse Bone Marrow to Investigate the Role of mTORC1 in Osteoclast Formation
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Elucidating the role of RBM5 in osteoclastogenesis: a novel potential therapeutic target for osteoporosis

Yuyang Zhang1,2, Xue Chen3, Yuan Xiao1,2

  • 1Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, China.

BMC Musculoskeletal Disorders
|November 29, 2023
PubMed

Insights

RNA-binding motif protein 5 (RBM5) is a novel gene linked to osteoporosis. Its knockdown impairs osteoclast differentiation and bone resorption, identifying RBM5 as a potential therapeutic target for osteoporosis.

Area of Science:

  • Molecular Biology
  • Genetics
  • Bone Biology

Background:

  • Osteoporosis is a complex bone disease with poorly understood molecular mechanisms.
  • Identifying novel genetic factors is crucial for developing effective treatments.

Purpose of the Study:

  • To identify novel key genes involved in osteoporosis pathogenesis.
  • To explore RNA-binding motif protein 5 (RBM5) as a potential pharmacological target.

Main Methods:

  • Analysis of three microarray datasets to identify differentially expressed genes.
  • LASSO and Spearman correlation analyses to identify RBM5 and related genes.
  • Functional enrichment analysis of associated genes.
  • In vitro knockdown of RBM5 in RAW264.7 cells using lentivirus-based shRNA.
  • Assessment of osteoclast differentiation and bone-resorbing activity.
  • RT-qPCR to analyze gene expression.

Main Results:

  • Four differentially expressed genes were identified, with RBM5 highlighted by LASSO analysis.
  • 52 genes significantly correlated with RBM5, enriched in RNA splicing and osteoclast differentiation pathways.
  • RBM5 knockdown in RAW264.7 cells impaired osteoclast differentiation and bone-resorbing activity.
  • Downregulation of osteoclastogenesis marker genes observed with RBM5 reduction.

Conclusions:

  • RBM5 plays a significant role in osteoporosis pathogenesis.
  • RBM5 is a promising novel pharmacological target for osteoporosis treatment.
Keywords:
BMDNFATc1Osteoclasts differentiationOsteoporosisRAW264.7RBM5

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