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Protein target complex

  • US 10,641,771 B2
  • Filed: 02/06/2013
  • Issued: 05/05/2020
  • Est. Priority Date: 02/06/2012
  • Status: Active Grant
First Claim
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1. A method for targeting proteins in cells whose plasma membrane has lost integrity, for discriminating between live cells and cells whose plasma membrane has lost integrity, wherein the method comprises:

  • (a) providing a population of cells in a tissue comprising cells whose plasma membrane has lost integrity and live cells, the cells providing a first intracellular protein;

    (b) applying a non-activated extracellularly applied compound to the population of cells, wherein the non-activated extracellularly applied compound is substantially unable to cross an intact cell membrane;

    wherein the non-activated extracellularly applied compound is selected from a group consisting of negatively charged non-toxic cyanine containing non-activated extracellularly applied compounds, wherein in the non-activated extracellularly applied compound the cyanine selectively interacts directly with at least one cell constituent, wherein the cell constituent is the first intracellular protein, wherein the first intracellular protein is a protein selected from the group consisting of fibrous proteins, metalloenzymes, Hsp90p co-chaperone (CDC37), binding isomers thereof, and binding decay products thereof,(c) targeting the cyanine of the cyanine containing non-activated extracellularly applied compound to the first intracellular protein in the cell whose plasma membrane has lost integrity, thereby forming a complex of the first intracellular protein and cyanine containing non-activated extracellularly applied compound, and(d) performing a measurement to determine an amount of targeted complexes formed between the cyanine of the cyanine containing non-activated extracellularly applied compound and the first intracellular protein in the cell whose plasma membrane has lost integrity thereby discriminating between live cells and cells containing the targeted complexes formed whose plasma membrane has lost integrity, wherein the measurement capable of detecting the targeted complexes formed is selected from the group consisting of;

    optical spectroscopies, optical microscopy, acoustical imaging, acoustic spectroscopies, Magnetic Resonance Imaging (MRI), Positron Emission Tomography (PET), Single Photon Emission Computed Tomography (SPECT), Computed Tomography (CT), and combinations thereof.

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