Changes in absorbance of monolayer of living cells induced by laser radiation at 633, 670, and 820 nm

Absorption changes in HeLa cells were evaluated from 530-890 nm. Cytochrome c oxidase becomes more oxidized (implying increased cellular oxidative metabolism) at all wavelengths used. This study supports the hypothesis that the mechanism of photobiomodulation is related to the chromophore cytochrome c.

Published:  IEEE Journal on Selected Topics In Quantum Electronics. 2001; 7(6): 982-988.
Keywords:  cytochrome c oxidase, low power laser therapy, redox-absorbance changes in living cells

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