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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Rescue of W-associated mast cell defects in W/Wv bone marrow cells by ectopic expression of normal and mutant epidermal growth factor receptors.

The normal human epidermal growth factor receptor (EGF-R) (HERc), a chimeric EGF-R/v-erbB (HERerbB) receptor, and the ligand-independent oncogenic EGF-R variant (v-erbB) were used to correct the mast cell defects in W/Wv bone marrow (BM) cells. In culture, all three receptor molecules transduced functional mitogenic signals in infected interleukin-3 (IL-3)-dependent bone marrow-derived mast cells (BMMCs) and enabled their differentiation into safranin-positive mast cells resembling connective tissue-type mast cells (CTMCs). Furthermore, expression of these receptors restored the capacity of W/Wv BMMCs to colonize the peritoneal cavity of mast cell-deficient W/Wv mice where they differentiated to safranin-positive cells with similar frequencies as wild-type BMMCs. These experiments show that expression of normal and mutant EGF-Rs in W/Wv BM cells is able to complement the function of the c-kit- encoded Steel factor receptor (SLF-R) in mast cell development. We conclude that signal transduction by normal and mutant EGF-Rs in murine hematopoietic cells apparently involves components also used by the SLF-R, which suggests that these receptors use overlapping pathways for signal transduction.[1]


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