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Efficient gene transfer in live mice using a unique retroviral packaging line
C Hesdorffer1, M Ward, D Markowitz
1Columbia University College of Physicians and Surgeons, Department of Medicine, New York, NY 10032.
DNA and Cell Biology
|December 1, 1990
Summary
This study demonstrates safe, long-term gene transfer in mice using a novel retroviral vector. Gene therapy models show that multiple stem cells are needed for successful bone marrow transplantation.
Area of Science:
- Molecular Biology
- Gene Therapy
- Hematology
Background:
- Gene therapy holds promise for treating genetic disorders.
- Efficient and safe gene transfer methods are crucial for therapeutic success.
- Retroviral vectors are commonly used for gene delivery.
Purpose of the Study:
- To evaluate gene transfer and expression in a mouse model for gene therapy.
- To assess the safety and efficiency of a novel retroviral packaging line (GP + E86).
- To investigate long-term gene transfer and stem cell reconstitution in successive generations of mice.
Main Methods:
- Irradiated mice were transplanted with genetically modified cells.
- A retroviral packaging line (GP + E86) was used for gene transfer of the neomycin resistance (neoR) gene.
- Cells from primary recipient mice were used for secondary and tertiary transplants.
Main Results:
- Efficient and safe long-term transfer of the neoR gene was achieved.
- Successful generation of secondary and tertiary recipient mice was observed.
- Low reconstitution activity of single stem cells was noted in successive generations.
Conclusions:
- The GP + E86 retroviral packaging line provides efficient and safe long-term gene transfer.
- Successful long-term bone marrow transplantation in mice requires multiple stem cells.
- Low stem cell cycling frequency may explain the limited reconstitution activity of single stem cells.