Attenuation of choroidal neovascularization by histone deacetylase inhibitor.

Attenuation of choroidal neovascularization by histone deacetylase inhibitor.
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DOI:
10.1371/journal.pone.0120587
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发表时间:
2015
期刊:
影响因子:
3.7
通讯作者:
Hinton DR
Hinton DR
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Chan N;He S;Spee CK;Ishikawa K;Hinton DR

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脉络膜新生血管(CNV)是年龄相关性黄斑变性的一种致盲并发症,表现为未成熟的脉络膜血管通过布鲁赫膜生长,在视网膜下可能出现液体渗漏或出血。在这里,我们证明组蛋白脱乙酰酶抑制剂(HDACi)曲古抑菌素A(TSA)可以下调人视网膜色素上皮(RPE)细胞中促血管生成缺氧诱导因子1α和血管内皮生长因子(VEGF),并上调抗血管生成和神经保护性色素上皮衍生因子。最引人注目的是,TSA 显着下调人血管内皮细胞中 VEGF 受体 2 的表达,从而抑制促血管生成细胞信号传导。此外,TSA 还能抑制 CNV 相关的伤口愈合反应和 RPE 上皮间质转分化。在使用 C57Bl/6 小鼠的激光诱导 CNV 模型中,全身给予 TSA 可显着减少激光后第 7 天和第 14 天的荧光素渗漏和 CNV 病变的大小,以及激光后第 7 天 CNV 病变中 VEGF、VEGFR2 和平滑肌肌动蛋白的免疫组织化学表达。该报告表明,应进一步评估 TSA 以及一般的 HDACi 的治疗潜力。 CNV。
Choroidal neovascularization (CNV) is a blinding complication of age-related macular degeneration that manifests as the growth of immature choroidal blood vessels through Bruch’s membrane, where they can leak fluid or hemorrhage under the retina. Here, we demonstrate that the histone deacetylase inhibitor (HDACi) trichostatin A (TSA) can down-regulate the pro-angiogenic hypoxia-inducible factor-1α and vascular endothelial growth factor (VEGF), and up-regulate the anti-angiogenic and neuro-protective pigment epithelium derived factor in human retinal pigment epithelial (RPE) cells. Most strikingly, TSA markedly down-regulates the expression of VEGF receptor-2 in human vascular endothelial cells and, thus, can knock down pro-angiogenic cell signaling. Additionally, TSA suppresses CNV-associated wound healing response and RPE epithelial-mesenchymal transdifferentiation. In the laser-induced model of CNV using C57Bl/6 mice, systemic administration of TSA significantly reduces fluorescein leakage and the size of CNV lesions at post—laser days 7 and 14 as well as the immunohistochemical expression of VEGF, VEGFR2, and smooth muscle actin in CNV lesions at post-laser day 7. This report suggests that TSA, and possibly HDACi’s in general, should be further evaluated for their therapeutic potential for the treatment of CNV.
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