血管内皮助长因子(VEGF)是成东谈主中健康和疾病工夫血管发育和血液及淋巴管功能的主要谈判因子。VEGF由几种细胞类型如成纤维细胞,炎性细胞和很多肿瘤细胞产生,时时反馈于通过HIF-1a道路加多的肿瘤缺氧。VEGF、HIF-1a和肿瘤的关系 恶性肿瘤的发生与细胞的过度增殖筹议,而肿瘤增殖需要大量耗氧,是以肿瘤组织乏氧是恶性肿瘤的进攻生物学特征。瘤细胞内对缺氧条款下作出应激反应的很多基因受HIF-1a调控,征询标明HIF-1a与肿瘤的助长养殖、侵袭和革新、重生血管生成、凋一火、耐药等特征王人密切关联。VEGF在肿瘤血管酿成中起关键作用,在缺氧时谈判VEGF的信号传导道路中,HIF-1a起中重要带作用情色网站,他的功能不仅使VEGF的mRNA融会性加多情色网站,而且能加多VEGF的转录活性。 当今,VEGF眷属由五个结构关联因子构成:VEGFA(也称为VEGFA165,而况征询最为充分),VEGFB,VEGFC,VEGFD和胎盘助长因子(PlGF)。VEGF眷属成员主要以同型二聚体多肽体式存在,尽管自然异二聚体的VEGFA和PlGF也仍是被报到。内皮细胞上的主要VEGF受体是VEGFR2。VEGFR2对于发育工夫和成东谈主,生理学和病理学中的内皮细胞生物学征询是进攻的靶标。当今对于VEGF受体的征询如故以VEGFR2信号传导较多。
In VEGFA165-mediated signal transduction of VEGFR2, the coordinated arrangement of endothelial cells in three dimensions to form and maintain a vascular tube requires endothelial cell proliferation, migration, survival, and permeability. These biological responses are mediated mainly by VEGFA-activated VEGFR2, via a complex network of intracellular signal transduction pathways. On VEGFA-binding to extracellular Ig-like domains 2 and 3 of VEGFR2, signaling molecules bind to phosphorylation sites in the intracellular domain of VEGFR2 and activate downstream mediators resulting in biological responses such as proliferation, migration, survival and permeability. 在VEGFA165介导的VEGFR2信号转导中,内皮细胞在三维上的合作陈设以酿成和看护血管,需要内皮细胞增殖,挪动,存活和浸透。这些生物反应主要由VEGFA激活的VEGFR2通过细胞内信号转导道路的复杂麇集介导。在VEGFA与VEGFR2的细胞外Ig样结构域2和3统一时,信号分子与VEGFR2的细胞内结构域中的磷酸化位点统一并激活卑劣介质,导致生物反应,举例增殖,挪动,存活和浸透。 Activation of the VEGF pathway has been identified in many disease processes ranging from cancer to autoimmunity, retinopathy and many more. The development of highly specific inhibitors of both the VEGF ligand (bevacizumab, VEGF-Trap, ranibizumab) as well as the VEGF receptor (cediranib, pazopanib, sorafenib, sunitinib, vandetanib, axitinib, telatinib, semaxanib, motesanib, vatalanib, Zactima) relates to the central role that this pathway plays in disease. 当今仍是在很多疾病流程中轻薄到了VEGF道路的激活,所述疾病流程领域从癌症到本身免疫,视网膜病等。VEGF配体(贝伐单抗,VEGF-Trap,雷珠单抗)以及VEGF受体(西地尼布,帕唑帕尼,索拉非尼,舒尼替尼,凡德他尼,阿西替尼,telatinib,semaxanib,莫特塞尼,瓦塔莱尼,扎卡蒂)的高度特异性阻拦剂的开拓触及该道路在疾病中阐明的中枢作用。VEGF征询热点靶点:
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