Influence of light intensity and irradiation mode on methylene blue, chlorin-e6 and curcumin-mediated photodynamic therapy against Enterococcus faecalis

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Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Federal de São Carlos (UFSCar)-
Autor(es): dc.creatorSampaio, Laís Simões [UNESP]-
Autor(es): dc.creatorde Annunzio, Sarah Raquel [UNESP]-
Autor(es): dc.creatorde Freitas, Laura Marise [UNESP]-
Autor(es): dc.creatorDantas, Lívia Oliveira-
Autor(es): dc.creatorde Boni, Leonardo-
Autor(es): dc.creatorDonatoni, Maria Carolina-
Autor(es): dc.creatorde Oliveira, Kleber Thiago-
Autor(es): dc.creatorFontana, Carla Raquel [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:26:42Z-
Data de disponibilização: dc.date.available2022-02-22T00:26:42Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-09-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.pdpdt.2020.101925-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/199194-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/199194-
Descrição: dc.descriptionThis study aimed to evaluate the effect of the continuous irradiation with low intensity (continuous mode) and fractioned irradiation with high intensity (fractionated mode), keeping the same dose of light by using Light Emitting Diode (LEDs) with wavelength emission centered at 450 and at 660 nm, using methylene blue (MB), chlorin-e6 (Ce6) and curcumin (CUR) as photosensitizers (PSs) against planktonic phase of E. faecalis. Cell viability was assessed by counting colonies forming per mL (CFU/mL), and the quantification of reactive species was performed by fluorescence with the photodegradation rate evaluated by measurements of absorbance of PSs at different times. The results revealed that MB-mediated PDT was efficient to achieve total microbial load reduction in both irradiation modes, but in fractional mode it was possible to use a lower light dose. Using Ce6, a total bacterial reduction was observed when fractional light was used, but at the same light dose, there was no reduction in the continuous irradiation mode. CUR-mediated PDT under continuous irradiation mode promoted the total microbial load reduction. However, for fractional mode, a higher concentration of CUR was required to completely reduce E. faecalis cell viability. Our results suggest that the biological response to PDT is variable depending on the irradiation mode and on the photosensitizer. Therefore, these studies indicate that the irradiation mode, intensity and the specific PSs should be taken into account for the development of clinical protocols for PDT.-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionUniversidade Estadual Paulista (Unesp) Faculdade de Ciências Farmacêuticas, Rodovia Araraquara-Jaú, km 1, Campus Ville-
Descrição: dc.descriptionUniversidade de São Paulo (USP) Instituto de Física de São Carlos-
Descrição: dc.descriptionUniversidade Federal de São Carlos (UFSCar) Departamento de Química, Rodovia Washington Luis, Km 235 - SP-310-
Descrição: dc.descriptionUniversidade Estadual Paulista (Unesp) Faculdade de Ciências Farmacêuticas, Rodovia Araraquara-Jaú, km 1, Campus Ville-
Descrição: dc.descriptionCNPq: # 140329/2016-1-
Descrição: dc.descriptionFAPESP: # 2018/00106-7-
Descrição: dc.descriptionFAPESP: # 2018/09088-1-
Descrição: dc.descriptionFAPESP: # 2018/23015-7-
Descrição: dc.descriptionCNPq: # 407990/2018-6-
Descrição: dc.descriptionFAPESP: 2013/07276-1-
Idioma: dc.languageen-
Relação: dc.relationPhotodiagnosis and Photodynamic Therapy-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectChlorin-e6-
Palavras-chave: dc.subjectCurcumin-
Palavras-chave: dc.subjectEnterococcus faecalis-
Palavras-chave: dc.subjectMethylene blue-
Palavras-chave: dc.subjectPhotodynamic therapy-
Título: dc.titleInfluence of light intensity and irradiation mode on methylene blue, chlorin-e6 and curcumin-mediated photodynamic therapy against Enterococcus faecalis-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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