Biological and Pharmaceutical Bulletin
Online ISSN : 1347-5215
Print ISSN : 0918-6158
ISSN-L : 0918-6158
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Enhanced c-Fms/M-CSF Receptor Signaling and Wound-Healing Process in Bone Marrow-Derived Macrophages of Signal-Transducing Adaptor Protein-2 (STAP-2) Deficient Mice
Osamu IkedaYuichi SekineRyuta MuromotoNorihiko OhbayashiAkihiko YoshimuraTadashi Matsuda
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2008 年 31 巻 9 号 p. 1790-1793

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Signal-transducing adaptor protein-2 (STAP-2) is a recently identified adaptor protein as a c-Fms/M-CSF receptor-interacting protein and constitutively expressed in macrophages. In our previous study, we examined the role of STAP-2 in the c-Fms/M-CSF receptor signaling using a murine macrophage tumor cells line, Raw264.7. Overexpression of STAP-2 in Raw264.7 cells markedly suppressed M-CSF-induced activation of extracellular signal regulated kinase and Akt. In addition, Raw264.7 overexpressing STAP-2 affected cell migration in wound-healing process. These results suggest that STAP-2 deficiency influences endogenous c-Fms/M-CSF receptor signaling. Here we show that loss of STAP-2 expression in knockout mouse macrophages results in marked enhancement of the c-Fms/M-CSF receptor signaling and wound-healing process. We therefore propose that STAP-2 acts as an endogenous regulator in normal macrophages functions.

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© 2008 The Pharmaceutical Society of Japan
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