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Photodynamic Therapy by Diaryl-Porphyrins to Control the Growth of Candida albicans

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Department of Biotechnology and Life Sciences, University of Insubria, 21100 Varese, Italy
2
Department of Industrial Engineering, University of Padua, 35131 Padua, Italy
3
Department of Biotechnology, University of Chemistry and Technology Prague, 166 28 Praha, Czech Republic
4
Department of Medicine and Surgery, University of Insubria, 21100 Varese, Italy
*
Author to whom correspondence should be addressed.
Cosmetics 2020, 7(2), 31; https://doi.org/10.3390/cosmetics7020031
Received: 14 April 2020 / Revised: 4 May 2020 / Accepted: 6 May 2020 / Published: 9 May 2020
(This article belongs to the Special Issue Feature Papers in Cosmetics in 2020)
Candida albicans is an opportunistic pathogen that often causes skin infections such as oral thrush, nail fungus, athlete’s foot, and diaper rash. Under particular conditions, C. albicans alters the natural balance of the host microbiota, and as a result, the skin or its accessory structures lose their function and appearance. Conventional antimycotic drugs are highly toxic to host tissues, and long-lasting drug administration induces the arising of resistant strains that make the antimycotic therapy ineffective. Among new antimicrobial approaches to combine with traditional drugs, light-based techniques are very promising. In this study, a panel of dyes was considered for photodynamic therapy (PDT) applications to control the growth of the model strain C. albicans ATCC 14053. The chosen photosensitizers (PSs) belong to the family of synthetic porphyrins, and in particular, they are diaryl-porphyrins. Among these, two monocationic PSs were shown to be particularly efficient in killing C. albicans upon irradiation with light at 410 nm, in a light-dose-dependent manner. The elicited photo-oxidative stress induced the loss of the internal cellular architecture and death. The photodynamic treatment was also successful in inhibiting the biofilm formation of clinical C. albicans strains. In conclusion, this study supports the great potential of diaryl-porphyrins in antimicrobial PDT to control the growth of yeasts on body tissues easily reachable by light sources, such as skin and oral cavity. View Full-Text
Keywords: Candida albicans; photodynamic treatment; porphyrins; PDT; antifungal Candida albicans; photodynamic treatment; porphyrins; PDT; antifungal
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Orlandi, V.T.; Martegani, E.; Bolognese, F.; Trivellin, N.; Maťátková, O.; Paldrychová, M.; Baj, A.; Caruso, E. Photodynamic Therapy by Diaryl-Porphyrins to Control the Growth of Candida albicans. Cosmetics 2020, 7, 31.

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