title: Synthesis and properties of oligonucleotides carrying isoquinoline imidazo[1,2-a]azine fluorescent units.
abstract: Oligonucleotides carrying novel fluorescent compounds with a dipolar isoquinoline imidazo[1,2-a]azine core were prepared. Analysis of the melting curves demonstrates that DNA duplexes carrying these fluorescent labels at their ends have a slight increase in DNA duplex stability. The UV absorption and fluorescent properties of the oligonucleotide conjugates were analyzed. The fluorescent label is sensitive to duplex formation, as cooperative melting curves are also observed at 366 nm and fluorescence has a large increase upon denaturation. Cell uptake studies allow observation of these fluorescently labeled oligonucleotides internalized into HeLa cells.
authors.affiliation: Institute for Research in Biomedicine, IQAC-CSIC, CIBER-BBN Networking Centre on Bioengineering, Biomaterials and Nanomedicine, Baldiri Reixac 10, Barcelona, Spain.
authors.forename: Sónia
authors.initials: S
authors.lastname: Pérez-Rentero
authors.forename: Nicola
authors.initials: N
authors.lastname: Kielland
authors.forename: Montserrat
authors.initials: M
authors.lastname: Terrazas
authors.forename: Rodolfo
authors.initials: R
authors.lastname: Lavilla
authors.forename: Ramon
authors.initials: R
authors.lastname: Eritja
mesh_terms: D001483:Base Sequence; D004247:DNA / Q000737:chemistry* / Q000378:metabolism; D005456:Fluorescent Dyes / Q000737:chemistry*; D006367:HeLa Cells / Q000378:metabolism / Q000473:pathology*; D006801:Humans; D007093:Imidazoles / Q000737:chemistry*; D007546:Isoquinolines / Q000737:chemistry*; D009691:Nucleic Acid Denaturation; D009841:Oligonucleotides / Q000138:chemical synthesis* / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D044366:Transition Temperature
chemical_list: D005456:Fluorescent Dyes; D007093:Imidazoles; D007546:Isoquinolines; D009841:Oligonucleotides; D004247:DNA