hCA VEGFR-2-IN-2 (compound 8g) 是一种具有吲哚酮基苯磺酰胺结构的化合物,目标是癌症相关的hCA IX XII 及VEGFR-2 的双重抑制剂。该化合物对VEGFR-2 表现出强效的抑制作用(IC50=204 nM),且对hCAs有高亲和力,Ki 值分别为 hCA IX 3.6 nM、hCA II 16.1 nM、hCA XII 16.7 nM 以及hCA I 75.3 nM。hCA VEGFR-2-IN-2 还展现出针对过表达VEGFR-2 的乳腺癌细胞的抗增殖活性。
Vascular endothelial growth factor receptor 2 (VEGFR2, also known as KDR and FLK1) is a receptor tyrosine kinase that regulates angiogenesis, vascular development, and embryonic hematopoiesis in response to VEGF isoforms A, C, and D. VEGFR2 kinase inhibitor II is a reversible, cell-permeable inhibitor of VEGFR2's kinase activity (IC50 = 70 nM). It less potently inhibits the platelet-derived growth factor receptor β (PDGFRβ; IC50 = 920 nM) and related receptor and non-receptor tyrosine kinases. VEGFR2 kinase inhibitor II blocks the growth of human umbilical vein endothelial cells stimulated with either VEGF or PDGF (IC50s = 110 nM and 2 μM, respectively).