Systematic evolution of ligands by exponential enrichment: tissue selex
First Claim
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1. A nucleic acid ligand to a cell target macromolecule identified according to the method comprising:
- a) preparing a candidate mixture of nucleic acid sequences;
b) contacting said candidate mixture of nucleic acids with said cell, wherein nucleic acids having an increased affinity to the cell macromolecule relative to the candidate mixture may be partitioned from the remainder of the candidate mixture;
c) partitioning the increased affinity nucleic acids from the remainder of the candidate mixture; and
d) optionally amplifying the increased affinity nucleic acids to yield a mixture of nucleic acids enriched for nucleic acid sequences with relatively higher affinity and specificity for binding to said cell,whereby said nucleic acid ligand to said macromolecule may be identified.
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Abstract
A new class of nucleic acid compounds, referred to as nucleic acid ligands, have been shown to exist that have a specific binding affinity for three dimensional molecular targets, including cell surface macromolecules. The nucleic acid ligands are identified by the method of the invention referred to as the Systematic Evolution of Ligands by EXponential enrichment (SELEX), wherein a candidate mixture of nucleic acids are iteratively enriched and the high affinity nucleic acids are amplified for further partitioning. The high affinity nucleic acid ligands are useful in capturing target cells.
55 Citations
10 Claims
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1. A nucleic acid ligand to a cell target macromolecule identified according to the method comprising:
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a) preparing a candidate mixture of nucleic acid sequences; b) contacting said candidate mixture of nucleic acids with said cell, wherein nucleic acids having an increased affinity to the cell macromolecule relative to the candidate mixture may be partitioned from the remainder of the candidate mixture; c) partitioning the increased affinity nucleic acids from the remainder of the candidate mixture; and d) optionally amplifying the increased affinity nucleic acids to yield a mixture of nucleic acids enriched for nucleic acid sequences with relatively higher affinity and specificity for binding to said cell, whereby said nucleic acid ligand to said macromolecule may be identified.
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- 2. A purified and isolated non-naturally occuring nucleic acid ligand to a cell macromolecule.
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6. A method of purifying macromolecule component of a cell comprising:
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a) identifying a nucleic acid ligand to said macromolecule according to the method comprising; i) preparing a candidate mixture of nucleic acid sequences; ii) contacting said candidate mixture of nucleic acids with said cell, wherein nucleic acids having an increased affinity to the cell macromolecule relative to the candidate mixture may be partitioned from the remainder of the candidate mixture; iii) partitioning the increased affinity nucleic acids from the remainder of the candidate mixture; and iv) optionally amplifying the increased affinity nucleic acids to yield a mixture of nucleic acids enriched for nucleic acid sequences with relatively higher affinity and specificity for binding to said cell whereby said nucleic acid ligand to said macromolecule may be identified; b) separating said macromolecule component of said cell away from the remainder of said cell on the basis of affinity between said cell macromolecule and said nucleic acid ligand; and c) purifying said macromolecule. - View Dependent Claims (7, 8, 9, 10)
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Specification