Methods and composition for in vivo gene therapy
First Claim
1. A method of introducing a DNA expression cassette into cells of a mammal, said method comprising introducing the expression cassette into the manual systemically, wherein:
- the DNA expression cassette comprises a promoter, and a DNA sequence encoding a gene product;
the DNA expression cassette is complexed to a lipid carrier comprising cationic lipids and cholesterol having a mean diameter of less than about 10 microns, resulting in a DNA expression cassette-lipid carrier complex;
the DNA expression cassette and lipid carrier does not aggregate in vitro; and
the DNA expression cassette to lipid carrier ratio is less than 6;
1 micrograms DNA to nanomoles cationic lipid.
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Abstract
Novel methods and compositions are provided for introducing a gene capable of modulating the genotype and phenotype into two or more tissues following systemic administration. The gene can be introduced into a mammalian host by way of an expression vector either as naked DNA or complexed to lipid carriers, particularly cationic lipid carriers. Multiple individual tissues can be transfected using naked DNA. Using a DNA: lipid carrier complex, multiple tissues and cell types can be transfected. The techniques and compositions find use in the palliation or treatment of any of a variety of genetic-based disorders.
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Citations
38 Claims
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1. A method of introducing a DNA expression cassette into cells of a mammal, said method comprising introducing the expression cassette into the manual systemically, wherein:
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the DNA expression cassette comprises a promoter, and a DNA sequence encoding a gene product; the DNA expression cassette is complexed to a lipid carrier comprising cationic lipids and cholesterol having a mean diameter of less than about 10 microns, resulting in a DNA expression cassette-lipid carrier complex; the DNA expression cassette and lipid carrier does not aggregate in vitro; and the DNA expression cassette to lipid carrier ratio is less than 6;
1 micrograms DNA to nanomoles cationic lipid. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 26, 27, 35, 36, 37, 38)
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2. A method of introducing a DNA expression cassette into a mammal, said method comprising introducing the expression cassette into the mammal systemically, wherein:
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the DNA expression cassette comprises a promoter, and a DNA sequence encoding a gene product; the DNA molecule is complexed to a lipid carrier comprising cationic and, optionally, non cationic lipids, said carrier having a mean diameter of less than about 10 microns, wherein the molar ratio of cationic lipids to non cationic lipids ranges from 1;
19 to 1;
0 resulting in a DNA lipid carrier complex;the DNA expression cassette and lipid carrier does not aggregate in vitro; the DNA expression cassette to lipid carrier ratio is less than 6;
1 micrograms DNA to nanomoles cationic lipid,whereby the expression cassette is introduced into cells of at least two tissues in the mammal. - View Dependent Claims (3, 4, 23, 25)
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28. A mammalian transformation complex comparing:
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a cationic lipid and a non-cationic lipid forming a liposome ranging in size from 100 nm to 10 microns in diameter;
combined withDNA in a ratio of less than 6;
1 micrograms DNA to nanomoles cationic lipid;wherein said non-cationic lipid comprises cholesterol and said complex does not aggregate in vitro wherein the cationic lipid is L-PE. - View Dependent Claims (29, 30, 31, 32)
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33. A kit comprising a cationic lipid, a non-cationic lipid comprising cholesterol, a container, and instructions in the use of the cationic lipid and non-cationic lipid for the transformation of a mammalian cell in vivo, wherein the cationic lipid is L-PE.
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34. A method of determining a ratio of DNA to lipid carrier which provides for optimum transformation of a cell in a mammal in vivo, said method comprising the steps of:
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systemically introducing a first DNA;
lipid carrier complex to a first mammal, wherein said first complex has a first ratio of DNA;
lipid carrier;systemically introducing a second DNA;
lipid carrier complex to a second mammal, wherein said second complex has a second ratio of DNA;
lipid carrier and said second ratio is different than said first ratio;selecting a target cell type in the first and second mammal for transformation, thereby providing a selected cell type in said mammals; measuring the percentage of cells of the selected cell type in the first and second mammal which are transformed with the DNA, thereby providing a percentage of cells of the selected cell type which are transformed in the first mammal, and a percentage of cells of the selected cell type which are transformed in the second mammal; and
,comparing the percentage of cells of the selected type which are transformed in the first mammal to the percentage of cells of the selected type transformed in the second mammal, thereby determining whether the first DNA;
lipid complex or the second DNA;
lipid carrier complex provides for optimum transformationwhereby at least two tissues in the mammal are transformed with the DNA.
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Specification