Related Experiment Video

Updated: Jun 7, 2025

A RANKL-based Osteoclast Culture Assay of Mouse Bone Marrow to Investigate the Role of mTORC1 in Osteoclast Formation
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Twofold Expression of Receptor Tyrosine Kinase 2 (ROR2) in Giant Cell Tumors of Bone: Outcome of a Case‒Control Study

Shiva S1, Sandeep Kumar Nema2, Shyam Kumar Tripathi3

  • 1Jawaharlal Institute of Postgraduate Medical Education and Research, Pondicherry, India 605006.

Indian Journal of Surgical Oncology
|November 18, 2024
PubMed

Insights

ROR2 expression is significantly upregulated in giant cell tumors of bone (GCT). This finding suggests ROR2 as a potential therapeutic target for GCT treatment and managing bone destruction.

Area of Science:

  • Oncology
  • Molecular Biology
  • Orthopedic Oncology

Background:

  • Transmembrane Wnt family proteins and receptor tyrosine kinases (ROR1, ROR2) are implicated in cancer development.
  • Giant cell tumor of bone (GCT) is a primary bone tumor where ROR2's role is not fully understood.

Purpose of the Study:

  • To investigate the expression levels of ROR2 in patients diagnosed with GCT.
  • To explore the correlation between ROR2 expression and GCT characteristics, including tumor grade and treatment response.

Main Methods:

  • A case-control study involving 11 GCT patients and matched controls.
  • Quantitative PCR (qPCR) was utilized to measure ROR2 gene expression in tumor tissues and healthy bone margins.
  • GCTs were classified using established radiologic and histologic grading systems.

Main Results:

  • A significant 2.51-fold upregulation of ROR2 expression was observed in GCT tissues compared to controls (P < 0.001).
  • ROR2 expression showed a trend of increase with higher tumor grades, although not statistically significant across different grading systems.
  • Neither bisphosphonate nor denosumab treatment significantly affected ROR2 expression levels.

Conclusions:

  • Patients with GCT demonstrate a substantial upregulation of ROR2, indicating its potential involvement in osteoclast-mediated bone destruction.
  • ROR2 represents a promising molecular target for the development of novel therapeutic strategies for GCT.
Keywords:
Case–control studyGiant cell tumor of boneOsteoclastomaPolymerase chain reactionReceptor tyrosine kinase

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