In this task, you are given a passage which has a question and the context. You have to generate an answer to the question based on the information present in the context.
Q: Context: Cancer stromal fibroblasts are important members of the cancer microenvironment. In this study, we determined the effect of sunitinib, a small molecule tyrosine kinase inhibitor, on the primary human colonic fibroblasts.', 'Cell cycle analysis and cell proliferation assays were performed to evaluate the inhibitory effect of sunitinib in vitro. Western-blot analysis was performed to evaluate variations in the levels of phosphorylated platelet-derived growth factor receptor (PDGFR-), Akt, and ERK proteins. Co-injection of SW620 cells and colonic fibroblasts in nude mice was employed to test anti-growth efficacy in vivo.', 'Sunitinib was found to effectively inhibit the growth of primary colonic fibroblasts. Low-dose sunitinib blocked the PDGF-BB-induced cell proliferation and PDGFR- signaling. Co-injection of SW620 cells and colonic fibroblasts in nude mice generated greater tumor volumes than single injection of SW620 cells. Sunitinib treatment inhibited the SW620 cell+colonic fibroblast tumor growth more effectively than treatment of 5-fluorouracil.\Question: Does sunitinib mesylate inhibit proliferation of human colonic stromal fibroblasts in vitro and in vivo?
A:
Sunitinib mesylate inhibited the proliferation of primary human colonic fibroblasts through target-inhibited PDGFR signaling in vitro and in vivo.