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Retroviral mutants efficiently expressed in embryonal carcinoma cells
Summary
Myeloproliferative sarcoma virus (MPSV) gene transfer is efficient in embryonic cells. Mutants were developed for improved PCC4 embryonal carcinoma cell transduction, enabling broader gene delivery applications.
Area of Science:
- Molecular Biology
- Virology
- Developmental Biology
Background:
- Myeloproliferative sarcoma virus (MPSV) exhibits an expanded host range due to U3 region mutations.
- MPSV can infect hematopoietic cells and, with a neomycin-resistance gene (NeoR-MPSV), F9 embryonal carcinoma cells.
Purpose of the Study:
- To investigate MPSV's host range in embryonal carcinoma cells.
- To develop MPSV mutants for efficient gene transfer into PCC4 embryonal carcinoma cells.
Main Methods:
- Utilized NeoR-MPSV for gene transfer studies in F9 and PCC4 cells.
- Induced differentiation in G418-resistant PCC4 cells and rescued provirus via murine leukemia virus superinfection.
- Assayed viral isolates (PCMV-5, -6) for expression in embryonal carcinoma cells.
Main Results:
- NeoR-MPSV efficiently transferred G418-resistance to F9 cells, but less so to PCC4 cells.
- Isolated PCMV-5 and -6 mutants showed equally high NeoR transfer efficiency in F9 and PCC4 cells as in fibroblasts.
- mos oncogene expression and viral genetic regions remained unaltered in mutants.
Conclusions:
- NeoR-MPSV and its mutants (PCMV-5, -6) are effective vectors for gene transduction into embryonic cells.
- Developed MPSV mutants overcome previous limitations for gene delivery into PCC4 embryonal carcinoma cells.