Linear DNA fragments for gene expression
AssigneeBaylor College of Medicine Texas Medical Center
InventorRuxandra Draghia-Akli
Life of this patent
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Abstract
Linear double-stranded DNA fragments containing a promoter, a nucleotide sequence, such as a transgene, preferably non-viral, and a 3′ untranslated region, are delivered to tissue of an animal by direct injection accompanied by electroporation. Long-term expression of the transgene results in prolonged availability of proteins, hormones, or enzymes that may be deficient in the mammal. In addition, the linear fragments increase the safety of the vectors for mammalian gene therapy by avoiding deleterious side effects.
Claims49
A construct for plasmid mediated gene supplementation, the construct being a linear double-stranded nucleic acid expression plasmid comprising:
- (a) a promoter;
- (b) a nucleotide sequence of interest;
- and
- (c) a 3′ untranslated region;
- wherein:
- the construct is substantially free from a viral backbone;
- the promoter, the nucleotide sequence of interest, and the 3′ untranslated region are operably linked;
- and
- in vivo expression of the nucleotide sequence of interest is regulated by the promoter.
A method for increasing levels of a polypeptide in a subject comprising the steps of:
- (a) delivering a linear double stranded nucleic acid expression construct into a selected tissue;
- and
- (b) applying a cell-transfecting pulse to the selected tissue;
- wherein:
- the construct is substantially free from a viral backbone;
- the polypeptide is encoded by a gene sequence on the linear double-stranded nucleic acid expression construct;
- and
- the linear double-stranded nucleic acid expression construct is delivered in an area comprising the cell-transfecting pulse.
A method for increasing levels of a polypeptide in a subject comprising the steps of:
- (a) placing a plurality of electrodes in the selected tissue,
- (b) delivering the linear double stranded nucleic acid expression construct into the selected tissue;
- and
- (c) applying an electrical pulse to the plurality of electrodes;
- wherein:
- the construct is substantially free from a viral backbone;
- the polypeptide is encoded by a gene sequence on the linear double-stranded nucleic acid expression construct;
- and
- the linear double stranded nucleic acid expression construct is delivered to the selected tissue in an area that interposes the plurality of electrodes.
A construct for plasmid mediated gene supplementation, the construct being a linear double-stranded nucleic acid expression plasmid comprising:
- (a) a promoter;
- (b) a nucleotide sequence of interest;
- and
- (c) a 3′ untranslated region;
- wherein:
- the construct is substantially free from a viral backbone;
- the promoter, the nucleotide sequence of interest, and the 3′ untranslated region are operably linked;
- and
- the nucleotide sequence of interest comprises a growth hormone releasing hormone;
- the promoter comprises a tissue-specific promoter;
- the 3′ untranslated region comprises a human growth hormone 3′ UTR;
- in vivo expression of the nucleotide sequence of interest is regulated by the promoter.
A method for increasing levels of a polypeptide in a subject comprising the steps of:
- (a) placing a plurality of electrodes in the selected tissue,
- (b) delivering the linear double stranded nucleic acid expression construct into the selected tissue;
- and
- (c) applying an electrical pulse to the plurality of electrodes;
- wherein the polypeptide is encoded by a gene sequence on the linear double-stranded nucleic acid expression construct;
- the linear double-stranded nucleic acid expression construct comprising:
- a promoter;
- a nucleotide sequence of interest;
- a 3′ untranslated region;
- and
- the promoter, the nucleotide sequence of interest, and the 3′ untranslated region are operably linked;
- the nucleotide sequence of interest comprises a growth hormone releasing hormone;
- the promoter comprises a tissue-specific promoter;
- the 3′ untranslated region comprises a human growth hormone 3′ UTR;
- and in vivo expression of the nucleotide sequence of interest is regulated by the promoter;
- the construct being substantially free from a viral backbone;
- the linear double stranded nucleic acid expression construct is delivered to the selected tissue in an area that interposes the plurality of electrodes;
- the delivering step comprises injection;
- and
- the tissue comprises muscle.
Dependencies are inferred from the claim text.