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Establishment of complement-resistant retroviral vector by homologous restriction factor 20 gene
Abstract:
Homologous restriction factor 20 (HRF20, CD59) is one of the complement regulatory factors. In this study, the complement-resistant retroviral vector, which possesses the HRF20 gene as a selection gene, was constructed and examined. The virus-producing cell, transduced with complement-resistant retroviral vector, was established after complement-dependent selection. NIH3T3 and PK15 cells transduced with this virus-producing cell were successfully selected by complement-dependent selection, which showed significant expression of the HRF20 antigen. In addition, these cells, transduced with tissue plasminogen activator (tPA) cDNA using complement-resistant retroviral vector, expressed tPA antigen after complement-dependent selection. These findings suggest that complement-resistant retroviral vector can be used for the double transduction of HRF20, as well as other genes.
Insights
A novel complement-resistant retroviral vector was developed using the HRF20 gene for selection. This vector enables efficient gene transduction, including double transduction of HRF20 and other genes like tPA.
Area of Science:
- Immunology
- Molecular Biology
- Gene Therapy
Background:
- Homologous restriction factor 20 (HRF20, CD59) is a key complement regulatory protein.
- Complement-mediated cell lysis poses a challenge for retroviral vector transduction.
- Developing complement-resistant vectors is crucial for efficient gene delivery.
Purpose of the Study:
- To construct and evaluate a complement-resistant retroviral vector utilizing the HRF20 gene as a selection marker.
- To demonstrate the efficacy of this vector in selecting transduced cells via complement-dependent selection.
- To assess the vector's capability for co-transduction of HRF20 and other therapeutic genes.
Main Methods:
- Construction of a retroviral vector encoding the HRF20 gene.
- Transduction of NIH3T3 and PK15 cells with the vector.
- Establishment of virus-producing cells through complement-dependent selection.
- Verification of HRF20 antigen expression in selected cells.
- Assessment of tissue plasminogen activator (tPA) gene transduction and expression.
Main Results:
- Successful construction of a complement-resistant retroviral vector with HRF20 as a selection gene.
- Establishment of virus-producing cells and successful selection of NIH3T3 and PK15 cells via complement-dependent selection.
- Significant expression of HRF20 antigen in selected cells.
- Demonstrated successful transduction and expression of tPA antigen in cells using the developed vector.
Conclusions:
- The developed complement-resistant retroviral vector facilitates efficient gene transduction.
- This vector system allows for complement-dependent selection of transduced cells.
- The vector shows potential for double transduction of HRF20 and other genes, including therapeutic ones like tPA.