Synthesis, Enzyme Assays and Molecular Docking Studies of Fluorina ted Bioisosteres of Santacruzamate A as Potential HDAC Tracers
作者:Muneer Ahamed、Koen Vermeulen、Michael Schnekenburger、Lise Roman Moltzau、Finn Olav Levy、Janos Marton、Mathy Froeyen、Dag Erlend Olberg、Marc Diederich、Guy Bormans
DOI:10.2174/1570180813666161101152943
日期:2017.6.30
Background: Histone deacetylases (HDACs) emerged as important epigenetic regulators
of gene expression.
Method: In order to identify potential positron emission tomography (PET) tracers for imaging
HDACs, we evaluated in vitro and in cellulo activities of some compounds that were reported as
potent HDAC2-selective inhibitors. We observed marked differences between reported activity
values and the values obtained in our assays for some of the compounds. To understand the structural
basis of the activity of some of these inhibitors, we also performed molecular docking studies to
understand their interaction patterns and binding modes with HDAC2.
Results and Conclusion: We observed the low affinity compounds 4, 6 and 7 did not showed equal
number of key π-π interactions and hydrogen bonding when compared to high affinity compounds,
and could be the possible reason for poor inhibition as reflected in in vitro assays. These preliminary
experimental and computational results will help to interpret the HDAC affinity values of these key
compounds with caution.
背景:组蛋白去乙酰化酶(HDACs)作为基因表达的重要表观遗传调控因子出现。
方法:为了鉴定潜在的正电子发射断层扫描(PET)示踪剂用于成像HDACs,我们评估了一些被报道为高效选择性HDAC2抑制剂的化合物在体外和细胞内的活性。我们观察到对于某些化合物,其报道的活动值与我们实验得到的值之间存在显著差异。为了理解其中一些抑制剂活性的结构基础,我们还进行了分子对接研究,以了解它们与HDAC2的相互作用模式和结合方式。
结果与结论:我们观察到低亲和性化合物4、6和7在比较中没有表现出与高亲和性化合物相同数量的关键π-π相互作用和氢键,这可能是其在体外实验中显示抑制作用较差的可能原因。这些初步的实验和计算结果将有助于谨慎解读这些关键化合物的HDAC亲和值。