Photodynamic therapy with chlorin-based photosensitizer at 405 nm: numerical, morphological, and clinical study

Maria Shakhova; Daria Loginova; Alina Meller; Dmitry Sapunov; Natalia Orlinskaya; Andrey Shakhov; Alexander Khilov; Mikhail Kirillin

doi:10.1117/1.JBO.23.9.091412

28 June 2018 Photodynamic therapy with chlorin-based photosensitizer at 405 nm: numerical, morphological, and clinical study

Maria Shakhova, Daria Loginova, Alina Meller, Dmitry Sapunov, Natalia Orlinskaya, Andrey Shakhov, Alexander Khilov, Mikhail Kirillin

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Journal of Biomedical Optics, Vol. 23, Issue 9, 091412 (June 2018). https://doi.org/10.1117/1.JBO.23.9.091412

Abstract

Employment of chlorin-based photosensitizers (PSs) provides additional advantages to photodynamic therapy (PDT) due to absorption peak around 405 nm allowing for superficial impact and efficient antimicrobial therapy. We report on the morphological and clinical study of the efficiency of PDT at 405 nm employing chlorin-based PS. Numerical studies demonstrated difference in the distribution of absorbed dose at 405 nm in comparison with traditionally employed wavelength of 660 nm and difference in the in-depth absorbed dose distribution for skin and mucous tissues. Morphological study was performed at the inner surface of rabbit ear with histological examinations at different periods after PDT procedure. Animal study revealed tissue reaction to PDT consisting in edema manifested most in 3 days after the procedure and neoangiogenesis. OCT diagnostics was confirmed by histological examination. Clinical study included antimicrobial PDT of pharynx chronic inflammatory diseases. It revealed no side effects or complications of the PDT procedure. Pharyngoscopy indicated reduction of inflammatory manifestations, and, in particular cases, hypervascularization was observed. Morphological changes were also detected in the course of monitoring, which are in agreement with pharyngoscopy results. Microbiologic study after PDT revealed no pathogenic bacteria; however, in particular cases, saprophytic flora was detected.

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Maria Shakhova, Daria Loginova, Alina Meller, Dmitry Sapunov, Natalia Orlinskaya, Andrey Shakhov, Alexander Khilov, and Mikhail Kirillin "Photodynamic therapy with chlorin-based photosensitizer at 405 nm: numerical, morphological, and clinical study," Journal of Biomedical Optics 23(9), 091412 (28 June 2018). https://doi.org/10.1117/1.JBO.23.9.091412

Received: 2 February 2018; Accepted: 31 May 2018; Published: 28 June 2018

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