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Myeloid-derived suppressor cells as a novel target for the control of osteolytic bone disease

Anandi Sawant1, Selvarangan Ponnazhagan

  • 1Department of Pathology; University of Alabama at Birmingham; Birmingham, AL USA.

Oncoimmunology
|June 14, 2013
PubMed

Insights

Myeloid-derived suppressor cells (MDSC) are identified as new osteoclast progenitors. Targeting MDSC may offer a novel strategy to control bone diseases characterized by osteolysis.

Area of Science:

  • Immunology
  • Oncology
  • Bone Biology

Background:

  • Bone metastases are associated with significant osteolytic lesions.
  • Osteoclasts are key cells responsible for bone resorption and osteolysis.
  • The cellular origins of osteoclasts in the context of bone metastasis are not fully understood.

Purpose of the Study:

  • To investigate the role of myeloid-derived suppressor cells (MDSC) in the development of osteoclasts.
  • To explore the therapeutic potential of targeting MDSC for the control of osteolytic bone disease.

Main Methods:

  • In vitro and in vivo differentiation assays of MDSC into osteoclasts.
  • Analysis of the nitric oxide signaling pathway in MDSC differentiation.
  • Evaluation of MDSC-targeting drugs in inhibiting osteolysis in mouse models.

Main Results:

  • Myeloid-derived suppressor cells from mice with bone metastases differentiate into functional osteoclasts.
  • This differentiation process is dependent on a nitric oxide signaling pathway.
  • Drugs targeting MDSC demonstrated robust inhibition of osteolysis.

Conclusions:

  • Myeloid-derived suppressor cells are identified as novel osteoclast progenitors.
  • Targeting MDSC represents a promising therapeutic strategy for managing osteolytic bone diseases.
Keywords:
bone metastasisbreast cancermyeloid-derived suppressor cellsosteoclasts

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