Cell type differences in activity of the Streptomyces bacteriophage phi-C31 integrase

Maucksch C, Aneja MK, Hennen E, Bohla A, Hoffmann F, Elfinger M, Rosenecker J, Rudolph C
Source: Nucleic Acids Res
Publication Date: (2008)
Issue: epub: online
Research Area:
Cancer Research/Cell Biology
Immunotherapy / Hematology
Stem Cells
Cells used in publication:
Species: human
Tissue Origin: blood
T cell, human peripheral blood unstim.
Species: human
Tissue Origin: blood
Mesenchymal stem cell (MSC), human
Species: human
Tissue Origin: bone marrow
Nucleofector® I/II/2b
Genomic integration by the Streptomyces bacteriophage C31 integrase is a promising tool for non-viral gene therapy of various genetic disorders. We investigated the C31 integrase recombination activity in T cell derived cell lines, primary T lymphocytes and CD34(+) haematopoietic stem cells in comparison to mesenchymal stem cells and cell lines derived from lung-, liver- and cervix-tissue. In T cell lines, enhanced long-term expression above control was observed only with high amounts of integrase mRNA. Transfections of C31 integrase plasmids were not capable of mediating enhanced long-term transgene expression in T cell lines. In contrast, moderate to high efficiency could be detected in human mesenchymal stem cells, human lung, liver and cervix carcinoma cell lines. Up to 100-fold higher levels of recombination product was found in C31 integrase transfected A549 lung than Jurkat T cells. When the C31 integrase activity was normalized to the intracellular integrase mRNA levels, a 16-fold difference was found. As one possible inhibitor of the C31 integrase, we found 3- to 5-fold higher DAXX levels in Jurkat than in A549 cells, which could in addition to other yet unknown factors explain the observed discrepancy of C31 integrase activity.