Gleevec/imatinib, an ABL2 kinase inhibitor, protects tumor and endothelial cells from semaphorin-induced cytoskeleton collapse and loss of cell motility.

Gleevec/imatinib, an ABL2 kinase inhibitor, protects tumor and endothelial cells from semaphorin-induced cytoskeleton collapse and loss of cell motility.
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DOI:
10.1016/j.bbrc.2014.04.063
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发表时间:
2014-05-30
影响因子:
3.1
通讯作者:
Klagsbrun, Michael
Klagsbrun, Michael
中科院分区:
生物学4区
文献类型:
--
作者:
Procaccia, Vera;Nakayama, Hironao;Shimizu, Akio;Klagsbrun, Michael

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3类信号蛋白是轴突导向介质和血管生成和肿瘤进展的调节因子(SEMA3A&F)通过解聚F-肌动蛋白起作用,导致细胞骨架崩溃一个关键的信号传导步骤是SEMA3A&F激活ABL 2酪氨酸激酶,ABL 2酪氨酸激酶激活p190 RhoGAP,p190 RhoGAP又使RhoA失活,从而减少了应力纤维的形成并导致细胞迁移。(伊马替尼,STI 571),一种ABL 2酪氨酸激酶抑制剂,消除了胶质母细胞瘤细胞和内皮细胞中SEMA 3A & F诱导的应力纤维损失,并降低了它们抑制迁移的能力。另一方面,受体酪氨酸激酶抑制剂Sutent(舒尼替尼)不能挽救SEMA 3A & F诱导的塌陷活性。这些结果描述了格列卫的一个新特性,即其拮抗脑信号蛋白的能力。
Class 3 semaphorins are axonal guidance mediators and regulators of angiogenesis and tumor progression Semaphorin 3A and 3F (SEMA3A&F) act by depolymerizing F-actin, resulting in cytoskeleton collapse A key signaling step is that SEMA3A&F activates ABL2 tyrosine kinase, which activates p190RhoGAP, which in turn inactivates RhoA, thereby diminishing stress fiber formation and ensuing cell migration We now demonstrate that Gleevec (imatinib, STI571), an ABL2 tyrosine kinase inhibitor, abrogates SEMA3A&F-induced stress fiber loss in glioblastoma cells and endothelial cells and diminishes their ability to inhibit migration. On the other hand, Sutent (sunitinib), a receptor tyrosine kinase inhibitor, did not rescue SEMA3A&F-induced collapsing activity. These results describe a novel property of Gleevec, its ability to antagonize semaphorins.
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