The cells of monocyte-macrophage lineage in mice with the 2-month polyethylene implantation
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B Rózalska1, H Długoñska, A Ljungh
1Department of Infectious Biology, University of Lódź, Poland.
Abstract:
End-point-attached heparinized polyethylene (H-PE) was implanted for 2 months into the peritoneum of C57B1/6 mice. The proliferation of bone marrow cells (BMCs) from implanted and non-implanted mice was investigated in M-CSF supplemented medium, in the presence or absence of macrophage-specific monoclonal antibodies (mAbs). The mAb HC 7.67.B, recognizing a surface determinant on immature monocytoid cells, inhibited the proliferation of BMCs from H-PE implanted mice without any influence on the proliferation of BMCs from non-implanted animals. The peritoneal macrophages from H-PE implanted mice demonstrated enhanced production of fibronectin (Fn) in comparison to the macrophages from non-implanted animals. Our results suggest changes in the differentiation of murine monocyte-macrophage lineage in the mice bearing H-PE implants for 2 months.
Insights
Heparinized polyethylene (H-PE) implants alter bone marrow cell proliferation in mice. Macrophage differentiation changes were observed, suggesting an impact on the monocyte-macrophage lineage.
Area of Science:
- Biomaterials Science
- Immunology
- Cell Biology
Background:
- Biomaterial implantation can elicit host immune responses.
- Understanding cellular responses to implanted materials is crucial for biomedical applications.
Purpose of the Study:
- To investigate the effect of heparinized polyethylene (H-PE) implants on bone marrow cell (BMC) proliferation and macrophage differentiation.
- To identify specific cellular markers involved in the response to H-PE.
Main Methods:
- Implantation of H-PE into the peritoneum of C57B1/6 mice for 2 months.
- Assessing BMC proliferation in vitro using M-CSF supplemented medium.
- Utilizing macrophage-specific monoclonal antibodies (mAbs) to analyze cell populations.
- Measuring fibronectin (Fn) production by peritoneal macrophages.
Main Results:
- H-PE implantation led to inhibited BMC proliferation in the presence of a specific mAb (HC 7.67.B) targeting immature monocytoid cells.
- BMCs from non-implanted mice showed no significant change in proliferation under the same conditions.
- Peritoneal macrophages from H-PE implanted mice exhibited enhanced fibronectin production.
Conclusions:
- H-PE implants induce changes in the murine monocyte-macrophage lineage.
- Specific surface markers on immature monocytoid cells are implicated in the response to H-PE.
- Enhanced fibronectin production by macrophages suggests a role in the host response to the implant.