New cytosine derivatives as inhibitors of DNA methylation
摘要:
DNA cytosine methylation catalyzed by DNA methyltransferase 1 (DNMT1) is an epigenetic method of gene expression regulation and development. Changes in methylation pattern lead to carcinogenesis. Inhibition of DNMT1 activity could be a good strategy of safe and efficient epigenetic therapy. In this work, we present a novel group of cytosine analogs as inhibitors of DNA methylation. We show new methods of synthesis and their effect on in vitro reaction of DNA methylation. Almost all of analyzed compounds inhibit DNA methyltransferase activity in the competitive manner. K-i values for the most potent compound 4-N-furfuryl-5,6-dihydroazacytosines is 0.7 mu M. These compounds cause also a decrease of 5-methylcytosine (m(5)C) level in DNA of mammalian HeLa and HEK293 cells. (C) 2012 Elsevier Masson SAS. All rights reserved.
PHOSPHORAMIDITE BUILDING BLOCKS FOR SUGAR-CONJUGATED OLIGONUCLEOTIDES
申请人:AM CHEMICALS LLC
公开号:US20160083414A1
公开(公告)日:2016-03-24
Novel nucleoside phosphoramidite building blocks for preparation of synthetic oligonucleotides containing at least one phosphotriester linkage conjugated to a monosaccharide and synthetic processes for making the same are disclosed. Furthermore, oligomeric compounds are prepared using said building blocks, preferably followed by removal of protecting groups to provide monosaccharide-conjugated oligonucleotides.
SOLID SUPPORTS AND PHOSPHORAMIDITE BUILDING BLOCKS FOR OLIGONUCLEOTIDE CONJUGATES
申请人:AM Chemicals LLC
公开号:US20180016232A1
公开(公告)日:2018-01-18
Novel non-nucleoside solid supports and phosphoramidite building blocks for preparation of synthetic oligonucleotides containing at least one non-nucleosidic moiety conjugated to a ligand of practical interest and synthetic processes for making the same are disclosed. Furthermore, oligomeric compounds are prepared using said solid supports and phosphoramidite building blocks, preferably followed by removal of protecting groups to provide oligonucleotides conjugated to ligands of interest.