The clinically used photosensitizer Verteporfin (VP) inhibits YAP-TEAD and human retinoblastoma cell growth in vitro without light activation.

The clinically used photosensitizer Verteporfin (VP) inhibits YAP-TEAD and human retinoblastoma cell growth in vitro without light activation.
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DOI:
10.1016/j.exer.2014.04.011
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发表时间:
2014-07
影响因子:
3.4
通讯作者:
Vavvas, Demetrios G.
Vavvas, Demetrios G.
中科院分区:
医学3区
文献类型:
--
作者:
Brodowska, Katarzyna;Al-Moujahed, Ahmad;Marmalidou, Anna;Horste, Melissa Meyer Zu;Cichy, Joanna;Miller, Joan W.;Gragoudas, Evangelos;Vavvas, Demetrios G.

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维替泊芬(VP)是一种苯并卟啉衍生物,临床上用于光动力疗法治疗新生血管性黄斑变性。近年来的研究表明,VP可通过抑制YAP-TEAD复合物而抑制肝癌细胞的生长,而不需要光活化。在这项研究中,我们研究了VP无光激活对人视网膜母细胞瘤细胞系的影响。维替泊芬(而非溶剂对照)以剂量依赖性方式抑制人视网膜母细胞瘤细胞系(Y 79和WERI)的生长、增殖和活力,并与YAP-TEAD相关下游原癌基因(如c-myc、axl和surviving)下调相关。此外,VP影响参与细胞迁移和血管生成的信号,如CTGF、VEGF 61和VEGF-A,但与mTOR/自噬途径的显著影响无关。感兴趣的是,多能性标记Oct 4通过维替泊芬处理下调。我们的研究结果表明,临床上使用的光敏剂VP是视网膜母细胞瘤细胞中细胞生长的有效抑制剂,破坏YAPTEAD信号传导和多能标志物OCT 4。这项研究首次强调了YAP-TEAD通路在视网膜母细胞瘤中的作用,并表明VP可能是治疗Rb患者的有用辅助治疗工具。
Verteporfin (VP), a benzoporphyrin derivative, is clinically used in photodynamic therapy for neovascular macular degeneration. Recent studies indicate that VP may inhibit growth of hepatoma cells without photoactivation hrough inhibition of YAP-TEAD complex. In this study, we examined the effects of VP without light activation on human retinoblastoma cell lines. Verteporfin but not vehicle control inhibited the growth, proliferation and viability of human retinoblastoma cell lines (Y79 and WERI) in a dose-dependent manner and was associated with downregulation of YAP-TEAD associated downstream proto-oncogenes such as c-myc, axl, and surviving. In addition VP affected signals involved in cell migration and angiogenesis such as CTGF, cyr61, and VEGF-A but was not associated with significant effect on the mTOR/autophagy pathway. Of interest the pluripotency marker Oct4 were downregulated by Verteporfin treatment. Our results indicate that the clinically used photosensitizer VP is a potent inhibitor of cell growth in retinoblastoma cells, disrupting YAPTEAD signaling and pluripotential marker OCT4. This study highlights for the first time the role of the YAP-TEAD pathway in Retinoblastoma and suggests that VP may be a useful adjuvant therapeutic tool in treating Rb patients.
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