Methods And Compositions For Cellular Imaging And Cancer Cell Detection Using Light Harvesting Conjugated Polymer-Biomolecular Conjugates
申请人:NATIONAL UNIVERSITY OF SINGAPORE
公开号:US20130189727A1
公开(公告)日:2013-07-25
The invention is a compound represented by any one of Structural Formulas (I)-(IV), or a salt thereof, wherein the values and alternative values for the variables are as defined in the Detailed Description of the Invention. Methods using a compound of Structural Formula (I)-(IV), or a salt thereof, are also presented.
[EN] METHODS AND COMPOSITIONS FOR CELLULAR IMAGING AND CANCER CELL DETECTION USING LIGHT HARVESTING CONJUGATED POLYMER- BIOMOLECULAR CONJUGATES<br/>[FR] PROCÉDÉS ET COMPOSITIONS DESTINÉS À L'IMAGERIE CELLULAIRE ET À LA DÉTECTION DE CELLULES CANCÉREUSES À L'AIDE DE CONJUGUÉS BIOMOLÉCULAIRES-POLYMÈRES CONJUGUÉS COLLECTEURS DE LUMIÈRE
申请人:UNIV SINGAPORE
公开号:WO2012002911A1
公开(公告)日:2012-01-05
The present invention relates to conjugated polyelectrolyte (CPE) or oligoelectrolyte (COE) compounds represented by general structural formulae (I) -(IV), or a salt thereof and methods of using these compounds to detect targets in samples. In particular, the methods include: (1) exposing a sample to a compound of structural formula (I), (II) or (IV) or a salt thereof, allowing the compound to bind to a target and detecting a signal produced by the compound; (2) functionalizing a solid support with a ligand, incubating the sample with a charged CPE or COE and detecting the fluorescence of the solid support and thereby detecting the target or (3) functionalizing a surface of a solid support with a charged ligand, thereby creating a charge on the surface of the solid support; incubating the ligand-functionalized solid support with a sample, whereupon binding of the target, the charge on the surface of the solid support switches; incubating the sample with CPE or COE that has a complementary charge to the charge of the target-bound surface; and detecting the fluorescence of the solid support and thereby detecting the target. The compounds of the present invention possess high photoluminescence quantum yields in biological media, low cytotoxicity, and excellent environmental stability and photostability and can be used in biosensor and bioimaging applications.
A Molecular Brush Approach to Enhance Quantum Yield and Suppress Nonspecific Interactions of Conjugated Polyelectrolyte for Targeted Far-Red/Near-Infrared Fluorescence Cell Imaging
作者:Kan-Yi Pu、Kai Li、Bin Liu
DOI:10.1002/adfm.201000495
日期:2010.9.9
substantially higher quantumyield (11%), but also reduced nonspecificinteractions with biomolecules in aqueous medium due to the shielding effect of PEG. In conjunction with its high photostability and low cytotoxicity, utilization of P4 as a far‐red/near‐infrared cellular probe allows for effective visualization and discrimination of MCF‐7 cancer cells from NIH‐3T3 normal cells in a high contrast