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https://www.arca.fiocruz.br/handle/icict/20639
LEISHMANICIDAL EFFECT OF ANTIPARASITIC PHOTODYNAMIC THERAPY-APPDT ON INFECTED MACROPHAGES
Author
Affilliation
Federal University of Bahia. Center of Biophotonics. Salvador, BA, Brazil
Federal University of Bahia. Center of Biophotonics. Salvador, BA, Brazil
Federal University of Bahia. Center of Biophotonics. Salvador, BA, Brazil / Estate University of Feira de Santana. Department of Biology. Feira de Santana, Brazil
Federal University of Bahia. Center of Biophotonics. Salvador, BA, Brazil
Federal University of Bahia. Center of Biophotonics. Salvador, BA, Brazil
Federal University of Bahia. Center of Biophotonics. Salvador, BA, Brazil
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil
Federal University of Bahia. Center of Biophotonics. Salvador, BA, Brazil / National Institute of Basic Optics and Applied to Life Sciences. São Carlos, SP, Brazil
Federal University of Bahia. Center of Biophotonics. Salvador, BA, Brazil
Federal University of Bahia. Center of Biophotonics. Salvador, BA, Brazil / Estate University of Feira de Santana. Department of Biology. Feira de Santana, Brazil
Federal University of Bahia. Center of Biophotonics. Salvador, BA, Brazil
Federal University of Bahia. Center of Biophotonics. Salvador, BA, Brazil
Federal University of Bahia. Center of Biophotonics. Salvador, BA, Brazil
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil
Federal University of Bahia. Center of Biophotonics. Salvador, BA, Brazil / National Institute of Basic Optics and Applied to Life Sciences. São Carlos, SP, Brazil
Abstract
The aim of this study is to evaluate the effects of ApPDT (antiparasitic photodynamic therapy) on the interaction of Leishmania braziliensis with J774 macrophages, used as a photosensitizer, methylene blue associated with red laser. The tests are in triplicate and the samples divided into four groups: control, photosensitizer, laser, and ApPDT. The photosensitizer used was the methylene blue at concentration of 12.5 μg/mL. The parameters of the laser were λ = 660 nm, 40 mW, and 8.4 J/cm(2). Samples are analyzed by optical microscopy through the identification and counting of infected and uninfected macrophages, parasite load, infectivity, and infection index. Statistical analysis used ANOVA test with Tukey post-test, being considered statistically significant p < 0.05. The analysis of the interaction tests shows that the infection rate in the ApPDT group in relation to the control group presents a statistically significant reduction (p < 0.0001) of 71% at both 24 and 48 h (p < 0.0001) of 62%. ApPDT reduces the number of macrophages infected by Leishmania braziliensis, as well as the number of intracellular parasites, being a possible alternative therapy in the treatment of cutaneous leishmaniosis.
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