In vitro gene transfer by the use of laser-induced stress wave: Effect of laser irradiation conditions on transfection efficiency

Mitsuhiro Terakawa, Shunichi Sato, Makoto Ogura, Yoshinori Masaki, Maki Uenoyama, Hitoshi Wakisaka, Hiroshi Ashida, Minoru Obara

Research output: Contribution to journalConference article


Laser-mediated gene transfection is very attractive as a new method for targeted gene therapy because of its high spatial controllability of laser energy. Previously, we demonstrated both in vivo and in vitro that plasmid DNA can be transfected by applying nanosecond pulsed laser-induced stress waves (LISW). In this study, we investigated the experimental conditions to increase transfection efficiency in vitro. By applying single-pulse LISW, transfection efficiency was increased with increasing laser fluence. Increase in the number of laser pulses increased transfection efficiency for laser fluences up to 1.3 J/cm2, but at higher fluences (>1.7 J/cm2), efficiency showed saturation tendency. Temperature dependence of transfection efficiency was also investigated.

Original languageEnglish
Article number36
Pages (from-to)225-229
Number of pages5
JournalProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Publication statusPublished - Aug 16 2005
Externally publishedYes
EventOptical Interactions with Tissue and Cells XVI - San Jose, CA, United States
Duration: Jan 24 2005Jan 26 2005


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging

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