Elucidation of the Fate of Exogenous DNA within Cells -Visualization of the Intracellular Defense Mechanism Against Exogenous Genes

Research Press Release | October 09, 2015

Press Release
Key Points ・Use of single-molecular fluorescence imaging technology to elucidate the fate of DNA introduced into a living cell.

・Discovery that the defense mechanism against exogenous gene expression, and DNA degradation activity, differ across cell lines.

・New insights that contribute to the elucidation of the molecular basis for DNA medicines and gene therapy, and to making them more efficient.

Overview We have developed a technology for visualizing the behavior of DNA molecules within living cells, and elucidated the intracellular fate of DNA introduced from the outside. This research makes use of single-molecular fluorescence imaging technology to visualize and analyze the behavior of exogenous DNA that were introduced into the cell from outside. We found that degradation of DNA in the cytoplasm serves as one important defense mechanism against exogenous gene expression, and blocks the effective expression of exogenous genes. We also discovered that this nuclease activity varies greatly depending on the cell type.


Until now, the fate of exogenous DNA introduced into a cell was treated as a black box. The present research provides a theoretical backbone for gene introduction research previously conducted by trial-and-error, and is expected to contribute to the elucidation of the molecular basis of DNA medicines and gene therapy, and to make them more efficient.


This research was jointly conducted between the Bioanalytical Research Group of the Biomedical Research Institute (Research Director Yoshihiro Ohmiya) of the National Institute of Advanced Industrial Science and Technology (AIST) (President Ryoji Chubachi), and by the Nano-Bio Probe Research Team (Team Leader Takashi Jin) of the RIKEN Quantitative Biology Center of RIKEN (President Hiroshi Matsumoto).

Inquiries

Masataka KINJO, Laboratory of Molecular Cell Dynamics, Faculty of Advanced Life Science, Hokkaido University

TEL: +81-11-706-9005

FAX: +81-11-706-9006

E-mail: kinjo@sci.hokudai.ac.jp

Japanese

Link

外来核酸が細胞内でどのような運命をたどるかを解明 -細胞の外来遺伝子に対する防御のしくみを可視化- (2015.9.25)
Publications  Raster image cross-correlation analysis for spatiotemporal visualization of intracellular degradation activities against exogenous DNAs, Scientific Reports (2015.9.24)

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