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01-12-2024 | Laser | Original Article

Simultaneous effect of medicinal plants as natural photosensitizers and low-level laser on photodynamic inactivation

Authors: Zahra Aghaebrahimi, Jamshid Sabaghzadeh, Sasan Soudi, Mohammadreza Tanhayi Ahary, Seyed Hassan Nabavi, Maliheh Ranjbaran

Published in: Lasers in Medical Science | Issue 1/2024

Abstract

Photodynamic inactivation (PDI) technology is a promising alternative to antibiotics. This technology is defined as the inhibition of bacterial growth with photosensitizers while irradiated with low-level laser light in the wavelength of 532 ± 2.08 nm. A challenging area in this field is selecting photosensitizers with antibacterial potential. In this paper, to enhance the antibacterial efficiency, the photosensitizers (the selected plant extracts) with a high absorption peak at the selected laser frequency, 532 nm, were prepared. Low-concentration ethanolic plant extracts of Hibiscus sabdariffa and Opuntia ficus-indica were found to exhibit significant antibacterial activity against, Acinetobacter baumannii ATCC 19606 and, Staphylococcus aureus ATCC 33591 as two important human pathogenic bacteria. The effectiveness of these natural photosensitizers was measured by determining their Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) values and by performing a time-killing assay in the absence and the presence of laser irradiation. Our results showed that the combination of low-level laser irradiation and the selected photosensitizers had excellent potential for treating in vitro bacterial infections. Therefore, PDI technology has great potential as a viable alternative to traditional antibiotics for combating bacterial infections. This study presents a promising avenue for further exploration of PDI and the use of laser technology in medical science.

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Title: Simultaneous effect of medicinal plants as natural photosensitizers and low-level laser on photodynamic inactivation
Authors: Zahra Aghaebrahimi
Jamshid Sabaghzadeh
Sasan Soudi
Mohammadreza Tanhayi Ahary
Seyed Hassan Nabavi
Maliheh Ranjbaran
Publication date: 01-12-2024
Publisher: Springer London
Keywords: Laser
Antibiotic
Published in: Lasers in Medical Science / Issue 1/2024
Print ISSN: 0268-8921
Electronic ISSN: 1435-604X
DOI: https://doi.org/10.1007/s10103-024-04037-8

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Simultaneous effect of medicinal plants as natural photosensitizers and low-level laser on photodynamic inactivation

Abstract

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

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