Publication details

Účinky nízkovýkonného laserového záření na pohyb buněk protozoí

Investor logo
Investor logo
Title in English Effects of the low-powered laser irradiation on the movement of protozoan cells
Authors

KOUTNÁ Markéta JANISCH Roman

Year of publication 2004
Type Article in Proceedings
Conference XXVII. Dny lékařské biofyziky, Sborník abstrakt
MU Faculty or unit

Faculty of Medicine

Citation
Field Biophysics
Keywords Therapeutic laser; protozoan movement
Description Two different protozoan species, Euglena gracilis and Tetrahymena thermophila, were used to study changes in locomotion behavior in response to low-power lasers. The cells were irradiated at 830 nm and 650 nm generated by a semiconductor laser (99 J/cm2, 360mW) and a laser pointer (0.75 J/cm2, 5mW), respectively, and their locomotion was recorded by a TV camera and analyzed by computer software. Exposure to laser light, regardless of the wavelength, resulted in increased cell velocity in both species (P<0.001). Exposure to 650 nm produced an equal increase in median cell velocity in both Euglena gracilis (19.0 % ) and Tetrahymena thermophila (18.2 %) and some increase persisted in the post-irradiation 30-second period. Irradiation by 830 nm resulted in a markedly higher response in Tetrahymena (29.4 %) than in Euglena (15.2%) and the two median values remained increased after irradiation was discontinued. Different reactions found in the species studied and some mechanisms underlying the response of cells to radiation are discussed.
Related projects:

You are running an old browser version. We recommend updating your browser to its latest version.

More info