Figure 5. Intra-tumoral VEGFR1_MOe13 injection results in regression of established MBA-MD-231 human breast adenocarcinoma xenograft tumors and decreased tumor vascularity.

a. MB-MDA-231 breast cancer cells were grown as xenografts in female nude mice for 2 weeks prior to beginning treatment with either a standard morpholino or VEGFR1_MOe13 designed to target the murine VEGFR1 transcript. Morpholino treated tumors demonstrate size regression after a 4 week treatment course as demonstrated by volume change analysis of 5 individual tumors within each treatment condition. p = 0.04 b–c. Following treatment course, RNA was extracted from xenograft tumors and soluble or membrane bound Flt1 levels were measured using real-time RT-PCR. Error bars indicate variation between individual PCR reactions per tumor sample. d. Following the treatment course, VEGFR1_MOe13 or standard morpholino xenograft tumors were sectioned and stained with isolectin as a measure of vascularity. Individual bars represent sections analyzed thoughout each tumor sample.