Plasmid for delivery of nucleic acids to cells and methods of use
First Claim
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1. A plasmid for delivery of a nucleic acid sequence to a eukaryotic cell, comprising:
- (a) a region which regulates plasmid copy number, wherein said region includes an origin of replication sequence;
(b) a region which regulates selection of a plasmid containing cell;
(c) a linker region connecting said region which regulates plasmid copy number to said region which regulates selection of a plasmid containing cell, wherein said linker region includes a site for inserting said nucleic acid sequence, and a transcriptional terminator element to ensure transcription of said region which regulates selection of a plasmid containing cell does not transcribe through said site for insertion of said nucleic acid sequence;
(d) a plurality of nucleic acid restriction sites flanking said origin of replication of said region which regulates plasmid copy number, said linker region, and said transcriptional terminator sequence; and
(e) a functional element inserted in a said nucleic acid restriction site, wherein said functional element is selected from the group consisting of a partitioning locus which helps ensure that at least one copy of said plasmid is transmitted to each new cell during cell division and a multimer resolution locus which promotes plasmid monomerization,wherein said region which regulates plasmid copy number, said linker region, and said region which regulates selection of a plasmid containing cell are positioned 5'"'"' to 3'"'"' in the order;
region which regulates plasmid copy number, linker region, region which regulates selection of a plasmid containing cell, and wherein the transcriptional orientation of said region which regulates selection of a plasmid containing cell is opposite to the transcriptional orientation of a said nucleic acid sequence inserted in said linker region.
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Abstract
This invention relates to plasmid constructs useful for nonviral human gene therapy. The plasmid constructs incorporate plasmid elements for achieving high copy number, avoiding plasmid instability an providing a plasmid selection process. These constructs can be used to deliver nucleic acids to cells in vehicles which are compatible with human therapeutic use.
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Citations
11 Claims
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1. A plasmid for delivery of a nucleic acid sequence to a eukaryotic cell, comprising:
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(a) a region which regulates plasmid copy number, wherein said region includes an origin of replication sequence; (b) a region which regulates selection of a plasmid containing cell; (c) a linker region connecting said region which regulates plasmid copy number to said region which regulates selection of a plasmid containing cell, wherein said linker region includes a site for inserting said nucleic acid sequence, and a transcriptional terminator element to ensure transcription of said region which regulates selection of a plasmid containing cell does not transcribe through said site for insertion of said nucleic acid sequence; (d) a plurality of nucleic acid restriction sites flanking said origin of replication of said region which regulates plasmid copy number, said linker region, and said transcriptional terminator sequence; and (e) a functional element inserted in a said nucleic acid restriction site, wherein said functional element is selected from the group consisting of a partitioning locus which helps ensure that at least one copy of said plasmid is transmitted to each new cell during cell division and a multimer resolution locus which promotes plasmid monomerization, wherein said region which regulates plasmid copy number, said linker region, and said region which regulates selection of a plasmid containing cell are positioned 5'"'"' to 3'"'"' in the order;
region which regulates plasmid copy number, linker region, region which regulates selection of a plasmid containing cell, and wherein the transcriptional orientation of said region which regulates selection of a plasmid containing cell is opposite to the transcriptional orientation of a said nucleic acid sequence inserted in said linker region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification