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BIBTEX RIS

The HIV aspartyl protease inhibitor ritonavir impairs planktonic growth, biofilm formation and proteolytic activity in Trichosporon spp.

2017; Taylor & Francis; Volume: 33; Issue: 8 Linguagem: Inglês

10.1080/08927014.2017.1350947

1029-2454

Rossana de Aguiar Cordeiro, Rosana Serpa, Patrícia Mendes, Antônio José de Jesus Evangelista, Ana Raquel Colares de Andrade, Jônatas da Silva Franco, Vandbergue Santos Pereira, Lucas Pereira de Alencar, Jonathas Sales de Oliveira, Zoilo Pires dè Camargo, Reginaldo Gonçalves de Lima-Neto, Débora de Souza Collares Maia Castelo‐Branco, Raimunda Sâmia Nogueira Brilhante, Marcos Fábio Gadelha Rocha, José Júlio Costa Sidrim,

Bacteriophages and microbial interactions

This study evaluated the effect of the protease inhibitor ritonavir (RIT) on Trichosporon asahii and Trichosporon inkin. Susceptibility to RIT was assessed by the broth microdilution assay and the effect of RIT on protease activity was evaluated using azoalbumin as substrate. RIT was tested for its anti-biofilm properties and RIT-treated biofilms were assessed regarding protease activity, ultrastructure and matrix composition. In addition, antifungal susceptibility, surface hydrophobicity and biofilm formation were evaluated after pre-incubation of planktonic cells with RIT for 15 days. RIT (200 μg ml−1) inhibited Trichosporon growth. RIT (100 μg ml−1) also reduced protease activity of planktonic and biofilm cells, decreased cell adhesion and biofilm formation, and altered the structure of the biofilm and the protein composition of the biofilm matrix. Pre-incubation with RIT (100 μg ml−1) increased the susceptibility to amphotericin B, and reduced surface hydrophobicity and cell adhesion. These results highlight the importance of proteases as promising therapeutic targets and reinforce the antifungal potential of protease inhibitors.