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Vasohibin-1 has been detected in endothelial cells as an intrinsic angiogenesis inhibitor. Both tumor-associated macrophages (TAMs) and transforming growth factor-β (TGF-β)/bone morphogenic protein (BMP) signaling have been reported to promote angiogenesis in cancer. However, whether vasohibin-1 expression is regulated by TGF-β/BMP signaling between TAMs and cancer cells remains unclear. The expression of TGF-β1, TGF-β2, BMP-4, and BMP-7 in TAMs and the expression of vasohibin-1, vascular endothelial growth factor-A (VEGF-A), and VEGF-C in two pancreatic cancer cell lines (a nonmetastatic cell line Panc-1 and a distant metastatic cell line HPAF-II) were measured by real-time reverse transcription-polymerase chain reaction (RT-PCR). The TGF-β receptor 1 and BMP receptor 1 were inhibited by the inhibitor SB-431542 and LDN193189, respectively. Thereafter, vasohibin-1, VEGF-A, and VEGF-C expression was detected by real-time RT-PCR. We found that the expression of TGF-β1, TGF-β2, BMP-4, and BMP-7 was upregulated in TAMs cocultured with pancreatic cancer cells. Vasohibin-1, VEGF-A, and VEGF-C mRNA expression in pancreatic cancer cells was upregulated by TAMs. Vasohibin-1 expression in pancreatic cancer cells cocultured with TAMs was upregulated significantly when TGF-β receptors or BMP receptors were inhibited, but VEGF-C expression was downregulated. Therefore, Vasohibin-1 expression is regulated by the TGF-β/BMP signaling between TAMs and pancreatic cancer cells. These results might shed a new light on the antiangiogenesis therapy in the pancreatic cancer.

journal of interferon and cytokine research

Vasohibin-1 Expression Is Regulated by Transforming Growth Factor-β/Bone Morphogenic Protein Signaling Pathway Between Tumor-Associated Macrophages and Pancreatic Cancer Cells