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Relevance of angiogenesis in neuroendocrine tumors
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While traditional cytotoxic drugs have shown limited efficacy in neuroendocrine tumors (NETs), their biological features have been characterized and can be exploited therapeutically. Their most prominent trait is an extraordinary vascularization in low-grade NETs and an hypoxia-dependent angiogenesis in high-grade NETs, which is associated to a significant expression of many pro-angiogenic molecules. Therefore, several antiangiogenic compounds have been tested in these malignancies and among these, sunitinib has demonstrated activity in pancreatic NET patients by dually targeting the VEGFR and PDGFR pathways. In spite of these efficacious clinical results, apparent resistance to antiangiogenic therapies has been described in NETs animal models and in clinical trials. Therefore, overcoming anti-angiogenic resistance is a crucial step in the subsequent development of antiangiogenic therapies. Several strategies have been postulated to fight resistance, but pre-clinical studies and clinical trials will investigate and address these therapeutic approaches in the coming years in order to overcome resistance anti-angiogenic therapies in NETs.
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TEULÉ-VEGA, Àlex and CASANOVAS I CASANOVAS, Oriol. Relevance of angiogenesis in neuroendocrine tumors. Targeted Oncology. 2012. Vol. 7, num. 2, pags. 93-98. [consulted: 3 of August of 2026]. Available at: https://hdl.handle.net/2445/171585