title: Specific modification of nucleic acids inside the cell with alkylating derivatives of oligonucleotides ethylated at internucleotide phosphates.
abstract: The alkylating derivatives of (C6H5NH)2P[dTp(Et)]4U and [dTp(Et)]9 U with completely esterified internucleotide phosphates bearing reactive 2,3 -O-4(N-2-chloroethyl N-methylamino)-benazylidene moiety attached to 3 -end cis-diol group were prepared. These alkylating derivatives of non-ionisable oligonucleotide analogs were demonstrated to penetrate efficiently into Krebs ascites tumor cells and to alkylate nucleic acids inside the cells with a strong preference towards complementary poly(A)-fragments of mRNA.
mesh_terms: D000477:Alkylating Agents; D000818:Animals; D002287:Carcinoma, Krebs 2 / Q000378:metabolism; D004353:Drug Evaluation, Preclinical; D051379:Mice; D009841:Oligonucleotides / Q000138:chemical synthesis* / Q000494:pharmacology; D011061:Poly A / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism
chemical_list: D000477:Alkylating Agents; D009841:Oligonucleotides; D012333:RNA, Messenger; D011061:Poly A