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      Elementary Processes in Cells after Light Absorption Do Not Depend on the Degree of Polarization: Implications for the Mechanisms of Laser Phototherapy

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          Abstract

          The objective of this work was to evaluate the importance of the degree of light polarization in stimulation of cellular metabolism.

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          Primary and secondary mechanisms of action of visible to near-IR radiation on cells.

          T Karu (1999)
          Cytochrome c oxidase is discussed as a possible photoacceptor when cells are irradiated with monochromatic red to near-IR radiation. Four primary action mechanisms are reviewed: changes in the redox properties of the respiratory chain components following photoexcitation of their electronic states, generation of singlet oxygen, localized transient heating of absorbing chromophores, and increased superoxide anion production with subsequent increase in concentration of the product of its dismutation, H2O2. A cascade of reactions connected with alteration in cellular homeostasis parameters (pHi, [Cai], cAMP, Eh, [ATP] and some others) is considered as a photosignal transduction and amplification chain in a cell (secondary mechanisms).
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            Effects of monochromatic low-intensity light and laser irradiation on adhesion of HeLa cells in vitro

            Tiina Karu, Galina Kalendo, Ludmila Pyatibrat … (1996)
            The adhesion of HeLa cells was evaluated after irradiation with monochromatic low-intensity light or laser irradiation. It is well known that the cell-cell and cell-matrix adhesion changes during wound repair. For better understanding of low-power laser light action on the wound healing process, it would be of interest to study the light action on cellular adhesion in vitro.
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              Effects of low-intensity polarized visible laser radiation on skin burns: a light microscopy study.

              Martha Ribeiro, Daniela De Fátima Teixeira Da Silva, Carlos Eugenio Nabuco de Araujo … (2004)
              This study was carried out to investigate the influence of low-intensity polarized visible laser radiation on the acceleration of skin wound healing.
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                Author and article information

                Journal
                Title: Photomedicine and Laser Surgery
                Abbreviated Title: Photomedicine and Laser Surgery
                Publisher: Mary Ann Liebert Inc
                ISSN (Print): 1549-5418
                ISSN (Electronic): 1557-8550
                Publication date Created: April 2008
                Publication date (Print): April 2008
                Volume: 26
                Issue: 2
                Pages: 77-82
                Affiliations
                [1 ]Institute of Laser and Information Technologies of Russian Academy of Sciences, Troitsk, Moscow Region, Russian Federation.
                [2 ]The State Research and Clinical Center for Laser Medicine, Moscow, Russian Federation.
                [3 ]Institute of Spectroscopy of Russian Academy of Sciences, Troitsk, Moscow Region, Russian Federation.
                Article
                DOI: 10.1089/pho.2007.2134
                PubMed ID: 18307393
                SO-VID: 6d220d73-e0c8-4745-97e1-59b456500943
                Copyright © © 2008
                License:

                https://www.liebertpub.com/nv/resources-tools/text-and-data-mining-policy/121/

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