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Differentiation of Functional Osteoclasts from Human Peripheral Blood CD14+ Monocytes
Published on: January 27, 2023
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Monocytes, Macrophages, and Osteoclasts in Osteosarcoma.
Fergal C Kelleher1,2, Hazel O'Sullivan2,3
11 Trinity College Dublin , Dublin, Ireland .
Journal of Adolescent and Young Adult Oncology
|March 7, 2017
Summary
Macrophages play a key role in osteosarcoma. Targeting M1 macrophages with muramyl tripeptide phosphatidyl ethanolamine (MTP-PE) shows therapeutic promise, despite M2 macrophage prevalence in tumors.
Area of Science:
- Immunology
- Oncology
- Cell Biology
Background:
- Macrophages are crucial in osteosarcoma development.
- Macrophages differentiate into M1 (inflammatory) and M2 (reparative) subtypes.
- Osteosarcomas are infiltrated by M2 macrophages, yet M1 macrophage targeting is a therapeutic advance.
Purpose of the Study:
- To review the roles of macrophages, monocytes, and osteoclasts in osteosarcoma.
- To explore therapeutic strategies targeting these cells in osteosarcoma.
Main Methods:
- Literature review focusing on macrophage and monocyte roles in osteosarcoma pathogenesis.
- Analysis of therapeutic approaches, including muramyl tripeptide phosphatidyl ethanolamine (MTP-PE).
Main Results:
- M2 macrophages are abundant in osteosarcoma.
- Targeting M1 macrophages with MTP-PE is a significant therapeutic advance for nonmetastatic osteosarcoma.
- The discrepancy between M2 presence and M1 targeting efficacy may involve macrophage plasticity or patrolling monocytes.
Conclusions:
- Macrophages, monocytes, and osteoclasts are key players in osteosarcoma.
- Further investigation into MTP-PE for metastatic osteosarcoma is warranted.
- Targeting these myeloid cells offers potential therapeutic avenues for osteosarcoma treatment.
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