Synthesis and Biological Evaluation ofortho-ArylN-Hydroxycinnamides as Potent Histone Deacetylase (HDAC) 8 Isoform-Selective Inhibitors
摘要:
AbstractHistone deacetylases (HDACs) are a family of enzymes that play a crucial role in biological process and diseases. In contrast to other isozymes, HDAC8 is uniquely incapable of histone acetylation. In order to delineate its physiological function, we developed HDAC8‐selective inhibitors using knowledge‐based design combined with structural modeling techniques. Enzyme inhibitory analysis demonstrated that some of the resulting compounds (22 b, 22 d, 22 f, and 22 g) exhibited anti‐HDAC8 activity superior to PCI34051, a known HDAC8‐specific inhibitor, with IC50 values in the range of 5–50 nM. Among them, compound 22 d showed antiproliferative effects toward several human lung cancer cell lines (A549, H1299, and CL1‐5); it exhibited cytotoxicity against human lung CL1‐5 cells similar to that of SAHA yet without significant cytotoxicity for normal IMR‐90 cells. Expression profiling of HDAC isoforms in three cancer cell lines indicated that the HDAC8 level in CL1‐5 is higher than that in H1299 and CL1‐1 cells, a result consistent with the differential cytotoxicity of compound 22 d. These results suggest the effectiveness of our design concept, which may lead to a tool compound for studying the specific role of HDAC8 in cellular biological processes.
Inhibitory Effects of 6-Alkoxycoumarin and 7-Alkoxycoumarin Derivatives on Lipopolysaccharide/Interferon γ-Stimulated Nitric Oxide Production in RAW264 Cells
摘要:
众所周知,香豆素及其衍生物具有抗炎和抗氧化作用。在这项研究中,我们从市售的 6-羟基香豆素(6HC)和 7-羟基香豆素(7HC)中合成了 32 种香豆素衍生物,并考察了它们对鼠巨噬细胞 RAW264 在脂多糖/干扰素γ(LPS/IFNγ)刺激下产生一氧化氮(NO)的影响。在这些衍生物中,6HC-8(6-(3-苯基丙氧基)香豆素)、6HC-14(6-(2-辛炔氧基)香豆素)、7HC-14(7-(2-辛炔氧基)香豆素)和 7HC-16(7-(3,5-二甲氧基苄氧基)香豆素)在低浓度(25 µ<小>M<小>)下明显抑制了一氧化氮的产生。这些合成的香豆素衍生物也明显抑制了诱导型 NO 合酶(iNOS)蛋白和 mRNA 的表达,这可以通过 Western 印迹和定量实时聚合酶链反应(RT-PCR)进行评估。
Synthesis and bioactivity of novel coumarin derivatives
作者:Sai-Yang Zhang、Dong-Jun Fu、Hui-Hui Sun、Xiao-Xin Yue、Ying-Chao Liu、Yan-Bing Zhang、Hong-Min Liu
DOI:10.1007/s10593-016-1898-3
日期:2016.6
A series of novel coumarin derivatives were synthesized from commercially available chemical agents. All prepared compounds were evaluated for their in vitro antiproliferative activity against five selected human cancer cell lines (EC109, MGC-803, PC-3, MCF-7, and EC9706) and their in vitro antimicrobial activity against E. coli and M. albicans. 4-(3-Bromopropoxy)-2H-chromen-2-one exhibited the highest
Structure–activity relationships for naturally occurring coumarins as β-secretase inhibitor
作者:Shinsuke Marumoto、Mitsuo Miyazawa
DOI:10.1016/j.bmc.2011.12.002
日期:2012.1
The present study was demonstrated to evaluate the effects of naturally occurring coumarins (NOCs) including simple coumarins, furanocoumarins, and pyranocoumarins on the inhibition of β-secretase (BACE1) activity. Of 41 NOCs examined, somefuranocoumarins inhibited BACE1 activity, but simple coumarins and pyranocoumarins did not affect. The most potent inhibitor was 5-geranyloxy-8-methoxypsoralen