Identifying Inhibitors of Inflammation: A Novel High-Throughput MALDI-TOF Screening Assay for Salt-Inducible Kinases (SIKs).

Identifying Inhibitors of Inflammation: A Novel High-Throughput MALDI-TOF Screening Assay for Salt-Inducible Kinases (SIKs).
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DOI:
10.1177/2472555217717473
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发表时间:
2017-12
期刊:
SLAS discovery : advancing life sciences R & D
影响因子:
--
通讯作者:
Trost M
Trost M
中科院分区:
其他
文献类型:
--
作者:
Heap RE;Hope AG;Pearson LA;Reyskens KMSE;McElroy SP;Hastie CJ;Porter DW;Arthur JSC;Gray DW;Trost M

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基质辅助激光解吸/电离飞行时间(MALDI TOF)质谱仪由于具有快速、灵活、灵敏以及无需标记就能测量生理底物的能力,已成为高通量药物发现的一种有前途的替代方案。在这里,我们开发并应用高通量MALDI TOF质谱仪来鉴定盐诱导激酶(SIK)家族的抑制剂,这些抑制剂是炎症性疾病领域中有趣的药物靶点,因为它们控制巨噬细胞中抗炎细胞因子白介素10(IL-10)的产生。在体外激酶分析中使用多肽底物,我们可以证明MALDI TOF激酶分析的HIT鉴定与间接ADP-Hunter激酶分析相关。此外,我们可以证明,这两种技术都能为一些热门化合物和已知的SIK激酶抑制剂生成可比的IC50数据。我们进一步将这些抑制物用于基于荧光的细胞检测,使用依赖于SIK活性的CRTC3转位到细胞核中,从而为在体外和细胞内鉴定SIK激酶抑制物提供了一条完整的分析管道。我们的数据表明,MALDI TOF质谱仪完全适用于高通量的激酶筛选,提供的无标记数据可与目前的高通量荧光分析相媲美。
Matrix-assisted laser desorption/ionization time-of-flight (MALDI TOF) mass spectrometry has become a promising alternative for high-throughput drug discovery as new instruments offer high speed, flexibility and sensitivity, and the ability to measure physiological substrates label free. Here we developed and applied high-throughput MALDI TOF mass spectrometry to identify inhibitors of the salt-inducible kinase (SIK) family, which are interesting drug targets in the field of inflammatory disease as they control production of the anti-inflammatory cytokine interleukin-10 (IL-10) in macrophages. Using peptide substrates in in vitro kinase assays, we can show that hit identification of the MALDI TOF kinase assay correlates with indirect ADP-Hunter kinase assays. Moreover, we can show that both techniques generate comparable IC50 data for a number of hit compounds and known inhibitors of SIK kinases. We further take these inhibitors to a fluorescence-based cellular assay using the SIK activity-dependent translocation of CRTC3 into the nucleus, thereby providing a complete assay pipeline for the identification of SIK kinase inhibitors in vitro and in cells. Our data demonstrate that MALDI TOF mass spectrometry is fully applicable to high-throughput kinase screening, providing label-free data comparable to that of current high-throughput fluorescence assays.
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