Abstract

The effects of laser irradiation on human and animal organisms have been intensively studied, but the mechanism of this effect is not well understood and discussed on the level of hypothesis. The effect of low-intensity laser irradiation (LILI) depends both on its physical parameters (wavelength, power density, time etc.) and on optical properites of irradiated tissues. The biological response on LILI started from the resonance absorption of irradiation by specific acceptors-enzymes, pigments and other biochemical structures containing in most cases chromophores. At the same time, distribution of absorbed energy between oscillated-excited states of atomic groups of macromolecules with following energy migration takes place too. Such effects induced changes in intensity of lipid peroxidation (LPO) and transitions of cell membrane confirmations with following changes of membrane enzyme activity (adenilate cyclase, ATPase) and ion permeability of membranes [1-3].

© 2001 OSA/SPIE