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© Research
Publication : Microbes and infection

Enhanced cloning efficiency of mouse bone marrow macrophage progenitors correlates with increased content of CSF-1 receptor of their progeny at low oxygen tension

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Microbes and infection - 01 Oct 2003

Flamant S, Lebastard M, Pescher P, Besmond C, Milon G, Marchal G

Link to Pubmed [PMID] – 14554247

Microbes Infect. 2003 Oct;5(12):1064-9

Mononuclear phagocytes are located in every tissue of metazoan organisms. In this extravascular space, they are designated as macrophages and are known to sense and process many signals including the local oxygen tension (PO2), which ranges from 150 mmHg at the lung apices to around 40 mmHg in mixed venous blood and most organs, and to less than 10 mmHg in tissues where long-term and dynamic remodeling processes occur. Most tissue macrophages survive and maintain their differentiated status within an environment bathed by colony-stimulating factor (CSF)-1 through the CSF-1 receptor, encoded by the Csf1r gene. In order to investigate the mRNA expression profile of macrophages as a function of PO2, we developed an in vitro model in which monocyte-derived macrophages were generated from mouse bone marrow progenitor cells grown and maintained under low (36 mmHg) or atmospheric (142 mmHg) PO2, in the presence of L929-conditioned medium (L-CM) as a source of CSF-1. We show that CSF-1-reactive C57BL/6 bone marrow cells displayed an increased cloning efficiency under a PO2 of 36, compared with 142 mmHg. Furthermore, we provide evidence of the overexpression of both CSF-1 receptor protein and mRNA by mouse monocyte-derived macrophages generated from bone marrow under low PO2.

https://www.ncbi.nlm.nih.gov/pubmed/14554247