Targeting the DNA damage response (DDR) by natural compounds

被引:20
|
作者
van Stuijvenberg, Jana [1 ]
Proksch, Peter [2 ]
Fritz, Gerhard [1 ]
机构
[1] Heinrich Heine Univ Dusseldorf, Med Fac, Inst Toxicol, Moorenstr 5, D-40225 Dusseldorf, Germany
[2] Heinrich Heine Univ Dusseldorf, Inst Pharmaceut Biol & Biotechnol, Univ Str 1, D-40225 Dusseldorf, Germany
关键词
DNA damage response; Cell death; Natural compounds; Tumor cell resistance; REDUCTASE INHIBITORS STATINS; MARINE SPONGE METABOLITE; DOUBLE-STRAND BREAKS; CANCER-CELLS; ANTICANCER ACTIVITY; PROTEIN-KINASE; IN-VITRO; APOPTOSIS; ARTESUNATE; BEAUVERICIN;
D O I
10.1016/j.bmc.2019.115279
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Natural compounds (NC) are an important source of anticancer drugs. The genomic DNA of tumor cells is a major target of conventional anticancer therapeutics (cAT). DNA damage elicits a complex stress response programme termed DNA damage response (DDR), with the PI3-like kinase ATM and ATR being the key regulators. Since the DDR coordinates mechanisms of DNA repair and apoptosis, hence regulating the balance between death and survival, it is an attractive target of novel anticancer strategies. The aim of the study was to identify natural compounds derived from endophytic fungi, lichens, marine sponges or plants that interfere with mechanisms of the DDR. To this end, the cytotoxic and DDR modulating potency of 296 natural compounds, used alone or in combination with the cAT cisplatin (Cis) and doxorubicin (Doxo) was investigated by fluorescencebased analysis of the ATM/ATR-catalyzed S139 phosphorylation of histone 2AX (gamma H2AX), a surrogate marker of DNA damage-triggered DDR. After initial screening, a total of ten natural compounds were identified that were toxic in pancreatic carcinoma cells and activated the DDR on their own and/or promoted the DDR if used in combination with cAT. Their mode of action was shown to be independent of drug transport mechanisms. Based on their chemical structures, DDR modulatory activity and published data we suggest the marine NC 5-epi-nakijiquinone Q and 5-epi-ilimaquinone as well as the fungal compound secalonic acid F as most promising NC-based drug candidates for future synthesis of DDR-modulating chemical derivatives and their preclinical in vitro and in vivo testing.
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页数:11
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