title: The synthesis and biological activities of oligodeoxynucleotides that are covalently linked to psoralen at their 5' ends.
abstract: Four oligodeoxynucleotides (15-mers), designated 13 through 16, and the corresponding conjugates, designated 17 through 20, in which psoralen was covalently linked to the 5' end of each oligonucleotide were synthesized. Compounds 16 and 20 contained a sequence that was complementary to part of the first four codons and the upstream sequence close to the ribosome-binding site of c-Ha-ras mRNA. Compounds 16 and 20 inhibited the growth of cells that had been transformed by the c-Ha-ras plasmid, with accompanying suppression of the expression of the activated c-Ha-ras oncogene. The antisense oligonucleotides 16 and 20 also appeared to cause partial reversion of the major phenotypic characteristics of transformed cells, which included inhibition of anchorage-independent growth. Compound 20, which contained psoralen, was a more efficient inhibitor of the growth of transformed cells than compound 16 without psoralen, a result that suggests psoralen might have increased the ability of the oligodeoxynucleotides to enter the cells.
authors.affiliation: School of Pharmaceutical Sciences, Beijing Medical University, People's Republic of China.
authors.forename: L X
authors.initials: LX
authors.lastname: Wang
authors.forename: D C
authors.initials: DC
authors.lastname: Yang
authors.forename: Y Y
authors.initials: YY
authors.lastname: Lu
authors.forename: Y
authors.initials: Y
authors.lastname: Takagi
authors.forename: K
authors.initials: K
authors.lastname: Taira
authors.forename: T
authors.initials: T
authors.lastname: Li
authors.forename: L H
authors.initials: LH
authors.lastname: Zhang
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002455:Cell Division / Q000187:drug effects; D005363:Ficusin / Q000737:chemistry* / Q000494:pharmacology; D015870:Gene Expression / Q000187:drug effects; D011905:Genes, ras / Q000187:drug effects; D051379:Mice; D008969:Molecular Sequence Data; D009841:Oligonucleotides / Q000737:chemistry* / Q000494:pharmacology; D016376:Oligonucleotides, Antisense / Q000138:chemical synthesis / Q000494:pharmacology; D016283:Proto-Oncogene Proteins p21(ras) / Q000096:biosynthesis / Q000235:genetics; D012333:RNA, Messenger / Q000096:biosynthesis; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D014162:Transfection; D014407:Tumor Cells, Cultured
chemical_list: D009841:Oligonucleotides; D016376:Oligonucleotides, Antisense; D012333:RNA, Messenger; D016283:Proto-Oncogene Proteins p21(ras); D005363:Ficusin