Curcumin-mediated antimicrobial photodynamic therapy reduces the viability and vitality of infected dentin caries microcosms

Autor(es)

Cusicanqui Mendez, Daniela Alejandra ^[1] ; Gutierres, Eliezer ^[1] ; Dionisio, Evandro Jose ^[1] ; Rabelo Buzalaf, Marilia Afonso ^[2] ; Oliveira, Rodrigo Cardoso ^[2] ; Andrade Moreira Machado, Maria Aparecida ^[1] ; Cruvinel, Thiago ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Pediat Dent Orthodont & Publ Hlth, Bauru Sch Dent, Alameda Dr Octavio Pinheiro Brisolla 9-75, BR-17012901 Bauru, SP - Brazil

^[2] Univ Sao Paulo, Dept Biol Sci, Bauru Sch Dent, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Photodiagnosis and Photodynamic Therapy; v. 24, p. 102-108, DEC 2018.
• Citações Web of Science: 6

Resumo

Background: To our knowledge, there is a lack of evidence on the effect of Antimicrobial Photodynamic Therapy (aPDT) by the application of curcumin against complex biofilms of dental caries lesions. This study aimed to evaluate the viability, vitality, and acid metabolism of infected dentin caries microcosms treated with curcumin-mediated aPDT. Methods: After microcosm biofilms growing anaerobically on bovine dentin disks immersed in McBain medium with 1% sucrose at 37 degrees C for 5 days, the biofilms were treated by the association of DMSO water solution or 600 mu mol L-1 curcumin with 0, 37.5 or 75 J cm(-2) blue LED (455 nm). Then, the colony-forming units (CFU) counts of total microorganisms, total streptococci, mutans streptococci, and total lactobacilli were determined by plating. The lactic acid concentration was analyzed by enzymatic spectrophotometry method, while the vitality of intact biofilms was evaluated by confocal laser scanning microscope (CLSM). Statistical analysis was performed by Kruskal Wallis and post-hoc Dunn's tests (P < 0.05). Results: Curcumin alone did not affect the viability of microorganisms and the vitality of intact biofilms. However, 75 J cm(-2) LED alone decreased the total microorganisms and total lactobacilli counts. The combination of curcumin and LED reduced significantly the counts of all microorganism groups and the vitality of intact biofilms. Differences were not observed between the lactic acid concentrations of distinct groups. Conclusions: Therefore, curcumin-mediated aPDT was effective in reducing the viability and the vitality of infected dentin caries microcosms, without interfering in their acidogenicity. (AU)

• Processo FAPESP: 15/08595-9 - Efeito da terapia fotodinâmica antimicrobiana sobre microrganismos específicos provenientes de microcosmos de lesões de cárie em dentina
• Beneficiário: Daniela Alejandra Cusicanqui Méndez
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 14/10897-0 - Efeito da terapia fotodinâmica antimicrobiana sobre microcosmos de lesões de cárie em dentina
• Beneficiário: Thiago Cruvinel da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/22238-1 - Efeito da terapia fotodinâmica antimicrobiana sobre microcosmos de lesões de cárie em dentina
• Beneficiário: Eliézer Gutierres
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica