title: Nucleic acids detection using cationic fluorescent polymer based on one-dimensional microfluidic beads array.
abstract: An assay for rapid and direct detection of DNA/mRNA using cationic fluorescent polymer based on one-dimensional microfluidic beads array (1-D chip) has been developed. The cationic water-soluble polythiophene derivatives can easily transduce hybridization events into measurable optical signal due to the conformational changes of the conjugated backbone, when mixed with single-stranded or double-stranded oligonucleotides. In this paper, the polymer was introduced into 1-D chip for fluorescence detection of nucleic acids, and demonstrated its capability on rapid detection of p53 complementary DNA (cDNA) with different concentration. Using this system, we have evaluated the mRNA expression changes of three tumor-associated genes (p53, c-myc and cyclin-d1) in human nasopharyngeal carcinoma CNE2 cell lines before and after 5-flouorouracil (5-FU) stimuli. These results were validated by the conventional reverse transcriptase-PCR. The most important advantage of this assay is not needed target or report labeling prior to hybridization, which makes the experiment process easy to handle and low-cost for multi-target measurement.
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Engineering Center for Biomedicine, Institute of life science and Biotechnology, Changsha, PR China.
authors.forename: Xiaohai
authors.initials: X
authors.lastname: Yang
authors.forename: Xiang
authors.initials: X
authors.lastname: Zhao
authors.forename: Xinbing
authors.initials: X
authors.lastname: Zuo
authors.forename: Kemin
authors.initials: K
authors.lastname: Wang
authors.forename: Jianhui
authors.initials: J
authors.lastname: Wen
authors.forename: He
authors.initials: H
authors.lastname: Zhang
mesh_terms: D002412:Cations / Q000737:chemistry; D045744:Cell Line, Tumor; D018076:DNA, Complementary / Q000032:analysis / Q000737:chemistry; D005456:Fluorescent Dyes / Q000032:analysis* / Q000737:chemistry*; D006801:Humans; D046210:Microfluidic Analytical Techniques / Q000379:methods*; D009696:Nucleic Acids / Q000032:analysis* / Q000737:chemistry*; D011108:Polymers / Q000032:analysis* / Q000737:chemistry*; D012333:RNA, Messenger / Q000032:analysis / Q000737:chemistry; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012996:Solutions; D013053:Spectrophotometry; D014158:Transcription, Genetic / Q000235:genetics; D016159:Tumor Suppressor Protein p53 / Q000032:analysis / Q000737:chemistry
chemical_list: D002412:Cations; D018076:DNA, Complementary; D005456:Fluorescent Dyes; D009696:Nucleic Acids; D011108:Polymers; D012333:RNA, Messenger; D012996:Solutions; D016159:Tumor Suppressor Protein p53