Targeting of genetic vaccine vectors
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Abstract
This invention provides methods of obtaining reagents for increasing the specificity of genetic vaccines for a desired target cell or tissue type. The invention also provides delivery vehicles for use to improve genetic vaccine specificity for a target cell or tissue type.
24 Citations
96 Claims
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1-50. -50. (canceled)
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51. A method for producing a binding moiety for use with a genetic vaccine, comprising:
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(a) creating a library of recombinant polynucleotides from a plurality of parental polynucleotides, wherein said parental polynucleotides differ from each other by at least two nucleotides, said recombinant polynucleotides containing a region encoding a polypeptide comprising a nucleic acid binding domain;
(b) transfecting a population of host cells with a library of genetic vaccine vectors, said vectors comprising a recombinant polynucleotide of (a) and a binding site for the polypeptide encoded by the recombinant polynucleotides, under conditions such that the polypeptide is expressed and binds To the vector binding site to produce a vector-binding moiety complex;
(c) lysing the host cells under conditions that do not disrupt binding of the vector-binding moiety complex;
(d) contacting the vector-binding moiety complex with a target cell of interest;
(e) identifying target cells containing the vector; and
(f) isolating the recombinant polynucleotides from the target cells to produce a population of selected polynucleotides. - View Dependent Claims (52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70)
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71. A method for producing a binding moiety for use with a genetic vaccine, comprising:
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(a) creating a library of recombinant polynucleotides from a plurality of parental polynucleotides, wherein said parental polynucleotides differ from each other by at least two nucleotides, said recombinant polynucleotides containing a region encoding a polypeptide comprising a nucleic acid binding domain and a region encoding a ligand that binds to the surface of a cell of interest;
(b) transfecting a population of host cells with a library of genetic vaccine vectors, said vectors comprising a recombinant polynucleotide of (a), a selection marker, and a binding site for the polypeptide encoded by the recombinant polynucleotides, under conditions such that the polypeptide is expressed and binds to the vector binding site to produce a vector-binding moiety complex;
(c) lysing the host cells under conditions that do not disrupt binding of the vector-binding moiety complex;
(d) contacting the vector-binding moiety complex with a target cell of interest;
(e) identifying target cells containing the vector; and
(f) isolating the recombinant polynucleotides from the target cells to produce a population of selected polynucleotides. - View Dependent Claims (72, 73, 74, 75, 76, 77, 78, 79)
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80. A method for producing a cell-specific binding moiety useful for increasing the uptake of a genetic vaccine by a target cell, comprising:
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(a) creating a first library of recombinant polynucleotides from a plurality of parental polynucleotides, wherein said parental polynucleotides differ from each other by at least two nucleotides, said recombinant polynucleotides containing a region encoding a polypeptide comprising a nucleic acid binding domain;
(b) creating a second library of recombinant polynucleotides from a plurality of parental polynucleotides, wherein said parental polynucleotides differ from each other by at least two nucleotides, said recombinant polynucleotides containing a region encoding a ligand that binds to the surface of a cell of interest;
(c) recombining recombinant polynucleotides from said first and second libraries to produce a third library of recombinant polynucleotides, said recombinant polynucleotides containing a region encoding a polypeptide comprising a nucleic acid binding domain a region encoding a ligand that binds to the surface of a cell of interest;
(d) transfecting a population of host cells with a library of genetic vaccine vectors, said vectors comprising a recombinant polynucleotide of (c) and a binding site for the polypeptide nucleic acid binding domain encoded by the recombinant polynucleotides of (c), under conditions such that the polypeptide in the vector is expressed and binds to the vector binding site to produce a vector-binding moiety complex;
(e) lysing the host cells under conditions that do not disrupt binding of the vector-binding moiety complex;
(f) contacting the vector-binding moiety complex with a target cell of interest;
(g) identifying target cells containing the vector, and (h) isolating the recombinant polynucleotides from the target cells to produce a population of selected polynucleotides. - View Dependent Claims (81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96)
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Specification