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Beads for capturing target cells from bodily fluid

  • US 7,439,062 B2
  • Filed: 12/23/2004
  • Issued: 10/21/2008
  • Est. Priority Date: 12/23/2004
  • Status: Active Grant
First Claim
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1. Beads for capturing target cells from a bodily fluid, which beads comprise:

  • spheroids of a size between about 5 μ

    m and about 500 μ

    m, said spheroids having an exterior hydrophilic hydrogel surface that is constituted of an isocyanate- or a thiocyanate-functional polymer containing residues of PEG, PPG, or a copolymer thereof that are polymerized by urethane bonds, andagents which are directly or indirectly bound to said hydrogel via isocyanate or thiocyanate groups of said polymer, wherein said agents can contact and bind ligands on the surfaces of said target cells.

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