Forced expression of ARTN in ER-MC cells stimulates tumor angiogenesis.

<p>(A) Immunohistochemical analysis of VEGF-A, CD31 and CD34 protein levels in xenograft tumors formed by MDA-MB-231 cells with forced expression of ARTN and control VEC. (B) Microvessel density (MVD) was assessed by quantifying percentage of area of CD31 or CD34 labelled cells in xenograft formed by either MDA-MB-231 cells with forced expression of ARTN or control VEC.