Immune deficiency enhances expression of recombinant human antibody in mice after nonviral in vivo gene transfer

  • Authors:
    • Kohji Kitaguchi
    • Mikako Toda
    • Masataka Takekoshi
    • Fumiko Maeda
    • Tatsuo Muramatsu
    • Atsushi Murai
  • View Affiliations

  • Published online on: October 1, 2005     https://doi.org/10.3892/ijmm.16.4.683
  • Pages: 683-688
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Abstract

A cDNA encoding human antibody against hepatitis B virus was expressed in normal and severe combined immune deficiency (SCID) mice to clarify whether or not host immune status affects circulating levels of the recombinant human antibody (RhAb) after nonviral in vivo gene transfer. For transferring genes, either electroporation (EP) or hydrodynamics-based transfection (HD) was employed. The former was applied to the leg muscle to express the gene, while the latter primarily targeted foreign gene expression in the liver. The expressed RhAb was secreted into the blood circulation, and its existence was assayed by ELISA. Prior to the investigation of host immune status, suitable forms of plasmid expression vectors and types of electrodes were determined in normal mice. Results showed that the vector encoding both the light and heavy chains driven by the CMV promoter had the highest plasma RhAb concentrations, and a pair of pincette-type electrodes conferred the best performance. In both EP and HD, the SCID state showed an increased and prolonged RhAb production in the blood circulation due probably to suppressed recognition of RhAb as a foreign protein to the host animal. The difference in gene transfer methods demonstrated a characteristic pattern: an early and sharp rise followed by a relatively rapid decrease in HD, in contrast to a gradual rise followed by a plateau level maintained in EP. As a result, with the same amount of gene transferred, the plasma RhAb concentrations for the first 7 or 8 weeks were higher in HD than EP, while the reverse was true for the latter period. Multiple gene transfer contributed to maintaining and prolonging high RhAb concentrations in plasma by both methods with similar characteristic patterns accompanying the respective gene transfer method. These results suggest the importance of host immunological potency for maintaining plasma RhAb concentrations if these gene transfer technologies are used for clinical and therapeutic purposes.

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October 2005
Volume 16 Issue 4

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Kitaguchi K, Toda M, Takekoshi M, Maeda F, Muramatsu T and Murai A: Immune deficiency enhances expression of recombinant human antibody in mice after nonviral in vivo gene transfer. Int J Mol Med 16: 683-688, 2005
APA
Kitaguchi, K., Toda, M., Takekoshi, M., Maeda, F., Muramatsu, T., & Murai, A. (2005). Immune deficiency enhances expression of recombinant human antibody in mice after nonviral in vivo gene transfer. International Journal of Molecular Medicine, 16, 683-688. https://doi.org/10.3892/ijmm.16.4.683
MLA
Kitaguchi, K., Toda, M., Takekoshi, M., Maeda, F., Muramatsu, T., Murai, A."Immune deficiency enhances expression of recombinant human antibody in mice after nonviral in vivo gene transfer". International Journal of Molecular Medicine 16.4 (2005): 683-688.
Chicago
Kitaguchi, K., Toda, M., Takekoshi, M., Maeda, F., Muramatsu, T., Murai, A."Immune deficiency enhances expression of recombinant human antibody in mice after nonviral in vivo gene transfer". International Journal of Molecular Medicine 16, no. 4 (2005): 683-688. https://doi.org/10.3892/ijmm.16.4.683