Recombinant Mouse M-CSF

Macrophage colony-stimulating factor, or M-CSF, is a secreted cytokine which influences hemopoietic stem cells to differentiate into macrophages or other related cell types. M-CSF is a key regulator of cellular proliferation, differentiation, and survival of blood monocytes, tissue macrophages and their progenitor cells. It enhances cytotoxicity, superoxide production, phagocytosis, chemotaxis, and secondary cytokine production in monocytes and macrophages.¹ It binds to the Colony stimulating factor 1 receptor. M-CSF is known as one of the factors essential for osteoclast development.²

The biological activity of Mouse M-CSF was determined by a cell proliferation assay using an M-CSF-dependent murine monocytic cell line, M-NFS-60 (Halenbeck, R. et al., 1989, Biotechnology 7:710 - 715). The expected ED₅₀ for this effect is typically 0.5 - 1.5 ng/ml.

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Lyophilized

The predicted molecular weight of Recombinant Mouse M-CSF is Mr 26 kDa. However, the actual molecular weight of the biologically active disulfide-linked homodimeric protein as observed by migration on SDS-PAGE is Mr 29 kDa.

26

This recombinant protein was 0.2 µm filtered and lyophilized from modified Dulbecco’s phosphate buffered saline (1X PBS) pH 7.2 – 7.4 with no calcium, magnesium, or preservatives.

This lyophilized protein is stable for six to twelve months when stored desiccated at -20°C to -70°C. After aseptic reconstitution, this protein may be stored at 2°C to 8°C for one month or at -20°C to -70°C in a manual defrost freezer. Avoid Repeated Freeze Thaw Cycles. See Product Insert for exact lot specific storage instructions.

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1. Nemunaitis, J. et al. (1998) Clin. Infect. Dis. 26: 1279
2. Ko, JS. et al. (2002) Exp Mol Med 34: 340