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Updated: Mar 25, 2026

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Myeloid Derived Suppressor Cells: Fuel the Fire.

B R Achyut1, Ali S Arbab1

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Biochemistry & Physiology
|March 1, 2016
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Summary

Hypoxia (low oxygen) in tumors recruits bone marrow cells that promote tumor growth and metastasis. Targeting these immunosuppressive myeloid cells offers a therapeutic strategy to inhibit tumor development.

Keywords:
Bone marrowHypoxiaMyeloid cellsSuppressor CellsTumor

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Area of Science:

  • Oncology
  • Immunology
  • Cell Biology

Background:

  • Tumor hypoxia is linked to poor prognosis and recruits bone marrow-derived cells (BMDCs).
  • Recruited BMDCs, including CXCR4+ cells, adopt pro-angiogenic phenotypes, supporting tumor growth.
  • Specific myeloid populations (CD11b+CD13+) within BMDCs influence tumor progression and immune suppression.

Purpose of the Study:

  • To investigate the role of hypoxia-recruited bone marrow-derived cells in tumor progression.
  • To elucidate the pro-tumorigenic and pro-metastatic functions of specific myeloid populations.
  • To explore the potential of targeting immunosuppressive myeloid cells for cancer therapy.

Main Methods:

  • Analysis of cell populations in tumor microenvironments under hypoxic conditions.
  • Characterization of bone marrow-derived cells (BMDCs) recruited to tumors.
  • Assessment of the immunosuppressive functions of myeloid-derived suppressor cells (MDSCs).

Main Results:

  • Hypoxia drives the recruitment of CXCR4+ BMDCs to tumors.
  • Recruited BMDCs differentiate into pro-angiogenic endothelial progenitor cells (EPCs) and immunosuppressive myeloid cells (MDSCs).
  • MDSCs inhibit cytotoxic T cell function and are found in premetastatic niches, indicating a role in metastasis.

Conclusions:

  • Hypoxia-induced recruitment of BMDCs, particularly immunosuppressive myeloid cells, promotes tumor growth and metastasis.
  • Targeting these protumorigenic and prometastatic myeloid populations is a promising therapeutic strategy.
  • Inhibiting myeloid-derived suppressor cells (MDSCs) could reduce tumor development and metastasis.