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- W1969908088 abstract "Post-translational addition of methyl groups to the amino terminal tails of histone proteins regulates cellular gene expression at various stages of development and the pathogenesis of cellular diseases, including cancer. Several enzymes that modulate these post-translational modifications of histones are promising targets for development of small molecule drugs. However, there is no promising real-time histone methylation detection tool currently available to screen and validate potential small molecule histone methylation modulators in small animal models. With this in mind, we developed genetically encoded molecular biosensors based on the split-enzyme complementation approach for in vitro and in vivo imaging of lysine 9 (H3–K9 sensor) and lysine 27 (H3–K27 sensor) methylation marks of histone 3. These methylation sensors were validated in vitro in HEK293T, HepG2, and HeLa cells. The efficiency of the histone methylation sensor was assessed by employing methyltransferase inhibitors (Bix01294 and UNC0638), demethylase inhibitor (JIB-04), and siRNA silencing at the endogenous histone K9-methyltransferase enzyme level. Furthermore, noninvasive bioluminescence imaging of histone methylation sensors confirmed the potential of these sensors in monitoring histone methylation status in response to histone methyltransferase inhibitors in living animals. Experimental results confirmed that the developed H3–K9 and H3–K27 sensors are specific and sensitive to image the drug-induced histone methylation changes in living animals. These novel histone methylation sensors can facilitate the in vitro screening and in vivo characterization of new histone methyltransferase inhibitors and accelerate the pace of introduction of epigenetic therapies into the clinic." @default.
- W1969908088 created "2016-06-24" @default.
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- W1969908088 date "2014-12-24" @default.
- W1969908088 modified "2023-10-01" @default.
- W1969908088 title "Genetically Encoded Molecular Biosensors To Image Histone Methylation in Living Animals" @default.
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- W1969908088 doi "https://doi.org/10.1021/ac502629r" @default.
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