A toolkit for the identification of NEAT1_2/paraspeckle modulators.

A toolkit for the identification of NEAT1_2/paraspeckle modulators.
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DOI:
10.1093/nar/gkac771
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发表时间:
2022-11-11
影响因子:
14.9
通讯作者:
Shelkovnikova, Tatyana A.
Shelkovnikova, Tatyana A.
中科院分区:
生物学2区
文献类型:
--
作者:
An, Haiyan;Elvers, Karen T.;Gillespie, Jason A.;Jones, Kimberley;Atack, John R.;Grubisha, Olivera;Shelkovnikova, Tatyana A.

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Paraspeckles 是由 NEAT1_2 lncRNA 组装的核糖核蛋白颗粒,NEAT1_2 lncRNA 是核 Paraspeckle 组装转录本 1 (NEAT1) 的亚型。 NEAT1_2/paraspeckles 的失调与多种人类疾病有关,使其成为有吸引力的药物靶点。然而,目前以 NEAT1_2/paraspeckle 为重点的转化研究和药物发现受到有限的工具包的阻碍。为了填补这一空白,我们开发并验证了一套用于识别 NEAT1_2 结合物和调节剂的工具,包括生化和基于细胞的测定。 NEAT1_2 三螺旋稳定性元件被用作生化测定中的靶标,细胞测定(“ParaQuant”)基于固定细胞中 NEAT1_2 的高内涵成像。作为原理证明,这些测定用于筛选 FDA 批准的 1,200 种化合物药物库和 170 种化合物激酶抑制剂库,并确认筛选结果。该检测方法建立起来很简单,仅使用市售试剂,并且可扩展以获得更高的通量。特别是,ParaQuant 是一种经济高效的检测方法,适用于贴壁培养中生长的任何细胞,并且适合多重检测。使用 ParaQuant,我们确定了双重 PI3K/mTOR 抑制剂是 paraspeckles 的有效负调节剂。我们在此描述的工具应该促进副斑点研究,并帮助指导 NEAT1_2/副斑点靶向小分子的搜索、验证和优化。
Paraspeckles are ribonucleoprotein granules assembled by NEAT1_2 lncRNA, an isoform of Nuclear Paraspeckle Assembly Transcript 1 (NEAT1). Dysregulation of NEAT1_2/paraspeckles has been linked to multiple human diseases making them an attractive drug target. However currently NEAT1_2/paraspeckle-focused translational research and drug discovery are hindered by a limited toolkit. To fill this gap, we developed and validated a set of tools for the identification of NEAT1_2 binders and modulators comprised of biochemical and cell-based assays. The NEAT1_2 triple helix stability element was utilized as the target in the biochemical assays, and the cellular assay (‘ParaQuant’) was based on high-content imaging of NEAT1_2 in fixed cells. As a proof of principle, these assays were used to screen a 1,200-compound FDA-approved drug library and a 170-compound kinase inhibitor library and to confirm the screening hits. The assays are simple to establish, use only commercially-available reagents and are scalable for higher throughput. In particular, ParaQuant is a cost-efficient assay suitable for any cells growing in adherent culture and amenable to multiplexing. Using ParaQuant, we identified dual PI3K/mTOR inhibitors as potent negative modulators of paraspeckles. The tools we describe herein should boost paraspeckle studies and help guide the search, validation and optimization of NEAT1_2/paraspeckle-targeted small molecules.
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