Wiskott-Aldrich syndrome protein regulates leukocyte-dependent breast cancer metastasis

Dan Ishihara, Athanassios Dovas, Lorena Hernandez, Maria Pozzuto, Jeffrey Wyckoff, Jeffrey E. Segall, John S. Condeelis, Anne R. Bresnick, Dianne Cox

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


A paracrine interaction between epidermal growth factor (EGF)-secreting tumor-associated macrophages (TAMs) and colony-stimulating factor 1 (CSF-1)-secreting breast carcinoma cells promotes invasion and metastasis. Here, we show that mice deficient in the hematopoietic-cell-specific Wiskott-Aldrich syndrome protein (WASp) are unable to support TAM-dependent carcinoma cell invasion and metastasis in both orthotopic and transgenic models of mammary tumorigenesis. Motility and invasion defects of tumor cells were recapitulated exvivo upon coculture with WASp-/- macrophages. Mechanistically, WASp is required for macrophages to migrate toward CSF-1-producing carcinoma cells,as well as for the release of EGF through metalloprotease-dependent shedding of EGF from the cell surface of macrophages. Our findings suggest that WASp acts to support both the migration of TAMs and the production of EGF, which in concert promote breast tumor metastasis

Original languageEnglish (US)
Pages (from-to)429-436
Number of pages8
JournalCell Reports
Issue number3
StatePublished - 2013

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)


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