Retroviral gene transfer into diploid fibroblasts for gene therapy
First Claim
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1. A process of gene transfer into diploid fibroblasts in vitro, comprising the step of:
- genetically modifying diploid fibroblasts explanted from a mammalian subject by a process consisting essentially of introducing into said fibroblasts a retroviral construct comprising a first nucleotide sequence encoding a first expression product, a viral long terminal repeat and a promoter sequence upstream of said first nucleotide sequence, and a viral long terminal repeat and a polyadenylation sequence downstream of said first nucleotide sequence, wherein said retroviral construct lacks one or more of the gag, pol, and env sequences required for retroviral replication, by contacting said fibroblasts with said retroviral construct in a virus-containing medium having a viral titer of at least about 105 cfu/ml on NIH 3T3 fibroblasts to produce a population of fibroblasts at least 1% of which express said first expression product.
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Abstract
A process of mammalian gene therapy. Explanted fibroblasts are genetically modified by introducing a retroviral construct containing a nucleotide sequence encoding for a therapeutic substance. The genetically modified fibroblasts are implanted into a mammalian subject.
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7 Claims
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1. A process of gene transfer into diploid fibroblasts in vitro, comprising the step of:
genetically modifying diploid fibroblasts explanted from a mammalian subject by a process consisting essentially of introducing into said fibroblasts a retroviral construct comprising a first nucleotide sequence encoding a first expression product, a viral long terminal repeat and a promoter sequence upstream of said first nucleotide sequence, and a viral long terminal repeat and a polyadenylation sequence downstream of said first nucleotide sequence, wherein said retroviral construct lacks one or more of the gag, pol, and env sequences required for retroviral replication, by contacting said fibroblasts with said retroviral construct in a virus-containing medium having a viral titer of at least about 105 cfu/ml on NIH 3T3 fibroblasts to produce a population of fibroblasts at least 1% of which express said first expression product. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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