Selective histonedeacetylase inhibitor M344 intervenes in HIV-1 latency through increasing histone acetylation and activation of NF-kappaB.

Selective histonedeacetylase inhibitor M344 intervenes in HIV-1 latency through increasing histone acetylation and activation of NF-kappaB.
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选择性组蛋白脱乙酰酶抑制剂 M344 通过增加组蛋白乙酰化和 NF-kappaB 激活来干预 HIV-1 潜伏期

DOI:
10.1371/journal.pone.0048832
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Zhu H
Zhu H
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Ying H;Zhang Y;Zhou X;Qu X;Wang P;Liu S;Lu D;Zhu H

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背景:组蛋白脱乙酰酶(HDAC)抑制剂提供了一种令人兴奋的新方法,可以激活潜伏感染细胞产生HIV,潜在地促进这些细胞的消除,并实现治愈。M344是一种新型的HDAC抑制剂,与曲古抑菌素A(TSA)相比,它在多种癌细胞中显示出强大的活性,并且毒性相对较低。然而,关于M344在潜伏感染细胞中诱导HIV表达的作用和作用机制还知之甚少。方法/主要发现利用HIV潜伏的Jurkat T细胞模型,我们证明了M344有效地重新激活了潜伏感染细胞中的HIV-1基因表达。此外,核因子-κB抑制剂阿司匹林可以强烈抑制M344介导的潜伏HIVLTR的激活。我们进一步证明,M344通过增加HIV-1长末端重复序列核小体1(NUC-1)处组蛋白H3和组蛋白H4的乙酰化,以及诱导HIV-1长末端重复序列NUC-1区域的NF-κB p65核转位和直接RELA DNA结合来发挥作用。我们还发现M344与前列腺素有协同作用,可以激活潜伏感染细胞中的HIV-1 LTR启动子。结论/意义这些结果提示M344在抗潜伏期治疗中的潜力,以及组蛋白修饰和NF-κB转录因子在调节HIV-1LtR基因表达中的重要作用。
Background Histone deacetylase (HDAC) inhibitors present an exciting new approach to activate HIV production from latently infected cells to potentially enhance elimination of these cells and achieve a cure. M344, a novel HDAC inhibitor, shows robust activity in a variety of cancer cells and relatively low toxicity compared to trichostatin A (TSA). However, little is known about the effects and action mechanism of M344 in inducing HIV expression in latently infected cells. Methodology/Principal Findings Using the Jurkat T cell model of HIV latency, we demonstrate that M344 effectively reactivates HIV-1 gene expression in latently infected cells. Moreover, M344-mediated activation of the latent HIV LTR can be strongly inhibited by a NF-κB inhibitor aspirin. We further show that M344 acts by increasing the acetylation of histone H3 and histone H4 at the nucleosome 1 (nuc-1) site of the HIV-1 long terminal repeat (LTR) and by inducing NF-κB p65 nuclear translocation and direct RelA DNA binding at the nuc-1 region of the HIV-1 LTR. We also found that M344 synergized with prostratin to activate the HIV-1 LTR promoter in latently infected cells. Conclusions/Significance These results suggest the potential of M344 in anti-latency therapies and an important role for histone modifications and NF-κB transcription factors in regulating HIV-1 LTR gene expression.
DOI: 10.1097/qad.0b013e32832ec1dc
发表时间: 2009-09-10
期刊: AIDS (London, England)
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