作者:Jessica Perrin、Thilo Werner、Nils Kurzawa、Anna Rutkowska、Dorothee D. Childs、Mathias Kalxdorf、Daniel Poeckel、Eugenia Stonehouse、Katrin Strohmer、Bianca Heller、Douglas W. Thomson、Jana Krause、Isabelle Becher、H. Christian Eberl、Johanna Vappiani、Daniel C. Sevin、Christina E. Rau、Holger Franken、Wolfgang Huber、Maria Faelth-Savitski、Mikhail M. Savitski、Marcus Bantscheff、Giovanna Bergamini
DOI:10.1038/s41587-019-0388-4
日期:2020.3
Monitoring drugâtarget interactions with methods such as the cellular thermal-shift assay (CETSA) is well established for simple cell systems but remains challenging in vivo. Here we introduce tissue thermal proteome profiling (tissue-TPP), which measures binding of small-molecule drugs to proteins in tissue samples from drug-treated animals by detecting changes in protein thermal stability using quantitative mass spectrometry. We report organ-specific, proteome-wide thermal stability maps and derive target profiles of the non-covalent histone deacetylase inhibitor panobinostat in rat liver, lung, kidney and spleen and of the B-Raf inhibitor vemurafenib in mouse testis. In addition, we devised blood-CETSA and blood-TPP and applied it to measure target and off-target engagement of panobinostat and the BET family inhibitor JQ1 directly in whole blood. Blood-TPP analysis of panobinostat confirmed its binding to known targets and also revealed thermal stabilization of the zinc-finger transcription factor ZNF512. These methods will help to elucidate the mechanisms of drug action in vivo. The targets of small-molecule drugs are detected in tissue and blood using thermal proteome assays.
监测药物与靶标的相互作用,采用如细胞热迁移测定(CETSA)等方法在简单细胞系统中已得到广泛应用,但在体内依然具有挑战性。在此我们介绍了一种组织热蛋白组分析(tissue-TPP),该方法通过定量质谱检测药物处理动物的组织样本中蛋白质热稳定性的变化,来测量小分子药物与组织中蛋白质的结合。我们报告了器官特异性、蛋白组范围的热稳定性图谱,并推导出非共价组蛋白去乙酰化酶抑制剂panobinostat在大鼠肝脏、肺、肾脏和脾脏中的靶标谱,以及B-Raf抑制剂vemurafenib在小鼠睾丸中的靶标谱。此外,我们设计了血液CETSA和血液TPP,并将其应用于直接在全血中测量panobinostat和BET家族抑制剂JQ1的靶标和非靶标结合。panobinostat的血液TPP分析确认了其与已知靶标的结合,还揭示了锌指转录因子ZNF512的热稳定性增强。这些方法将有助于阐明药物在体内的作用机制。小分子药物的靶标在组织和血液中通过热蛋白组测定被检测到。