FIGURE 6 from Cancer-associated Fibroblast–specific Expression of the Matricellular Protein CCN1 Coordinates Neovascularization and Stroma Deposition in Melanoma Metastasis

Deletion of Ccn1 in Col1A2-Cre-fibroblasts reduces tumor vasculature. A, Tumors in wild-type or mice deleted for Ccn1 in Col1A2-Cre-fibroblasts were perfused with a CT-contrast agent, as described in Materials and Methods. Volume (mL) of tumor occupied by vasculature was calculated. Mice lacking Ccn1 in their fibroblasts had significantly reduced vascular volume (t test, n = 3, P < 0.05). B, Tumors and associated stroma in wild-type or mice deleted for Ccn1 in fibroblasts were stained with anti-CD31 antibodies (t test; n = 3; *, P < 0.05).