Salivary pellicles equalise surfaces’ charges and modulate the virulence of candida albicans biofilm
Yuri Wanderley Cavalcanti, Melanie Wilson, Michael Lewis, David Williams, Plínio Mendes Senna, Altair Antoninha Del-Bel-Cury, Wander José da Silva
ARTIGO
Inglês
Numerous environmental factors influence the pathogenesis of Candida biofilms and an understanding of these is necessary for appropriate clinical management. Aims To investigate the role of material type, pellicle and stage of biofilm development on the viability, bioactivity, virulence and...
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Numerous environmental factors influence the pathogenesis of Candida biofilms and an understanding of these is necessary for appropriate clinical management. Aims To investigate the role of material type, pellicle and stage of biofilm development on the viability, bioactivity, virulence and structure of C. albicans biofilms. Methods The surface roughness (SR) and surface free energy (SFE) of acrylic and titanium discs was measured. Pellicles of saliva, or saliva supplemented with plasma, were formed on acrylic and titanium discs. Candida albicans biofilms were then generated for 1.5 h, 24 h, 48 h and 72 h. The cell viability in biofilms was analysed by culture, whilst DNA concentration and the expression of Candida virulence genes (ALS1, ALS3 and HWP1) were evaluated using qPCR. Biofilm metabolic activity was determined using XTT reduction assay, and biofilm structure analysed by Scanning Electron Microscopy (SEM). Results Whilst the SR of acrylic and titanium did not significantly differ, the saliva with plasma pellicle increased significantly the total SFE of both surface. The number of viable microorganisms and DNA concentration increased with biofilm development, not differing within materials and pellicles. Biofilms developed on saliva with plasma pellicle surfaces had significantly higher activity after 24 h and this was accompanied with higher expression of virulence genes at all periods. Conclusion Induction of C. albicans virulence occurs with the presence of plasma proteins in pellicles, throughout biofilm growth. To mitigate such effects, reduction of increased plasmatic exudate, related to chronic inflammatory response, could aid the management of candidal biofilm-related infections
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COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES
007355/2013-00
FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
2012/07436-6
Fechado
Salivary pellicles equalise surfaces’ charges and modulate the virulence of candida albicans biofilm
Yuri Wanderley Cavalcanti, Melanie Wilson, Michael Lewis, David Williams, Plínio Mendes Senna, Altair Antoninha Del-Bel-Cury, Wander José da Silva
Salivary pellicles equalise surfaces’ charges and modulate the virulence of candida albicans biofilm
Yuri Wanderley Cavalcanti, Melanie Wilson, Michael Lewis, David Williams, Plínio Mendes Senna, Altair Antoninha Del-Bel-Cury, Wander José da Silva
Fontes
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Archives of oral biology Vol. 66 (June, 2016), p. 129-140 |