Peptides DLL37-1 and LL37-1, an alternative to inhibit biofilm formation in clinical isolates of Staphylococcus aureus and Staphylococcus epidermidis

Autores organización

• 

  Javier Antonio Escobar Perez

  Autor

Autores

• Alba MLS
• Durán-Rodriguez AT
• Pulido LMS
• Gutiérrez SA
• Ospina JN
• Bermúdez GP
• Molina LCM

Grupos de investigación

• Laboratorio de Genética Molecular Bacteriana LGMB

  

  Investigador

  Javier Antonio Escobar Perez

Resumen

Staphylococcus aureus and Staphylococcus epidermidis have microbial surface components recognizing adhesive matrix molecules (MSCRAMM) adhesion proteins that enhance their biofilm formation ability, as well as virulence factors that influence morbidity and mortality in hospital settings. In this work, four peptides analogous of the peptide LL-37 that were evaluated to inhibit biofilm formation and its action potential on the expression of MSCRAMM proteins in clinical isolates through different tests, such as crystal violet, PCR and qPCR. In total, 96.8% of S. aureus were strong in biofilm formation in contrast to 48.4% of S. epidermidis. sdrG and sdrF genes were present in 100% of S. epidermidis strains and in all isolates. In S. aureus, specific genes that code for MSCRAMM proteins were detected: clfA (89%), clFB, sdrC and fnBA (94%). The peptides did not show hemolytic or cytotoxic activity. In this study, it was evidenced that of the peptides DLL37-1 at a 5 µM concentration was an efficacious antimicrobial agent and depicted greater biofilm inhibition in both bacterial species. Exhibiting a significant inhibition rate in S. aureus, this peptide caused a negative regulation in the expression of the genes clfA and sdrC, showed greater biological activity. © 2022, Academia Brasileira de Ciencias. All rights reserved.

Keywords

• Adhesins, Bacterial; Biofilms; Humans; Peptides; Staphylococcal Infections; Staphylococcus aureus; Staphylococcus epidermidis; adhesin; peptide; biofilm; human; Staphylococcus aureus; Staphylococcus epidermidis; Staphylococcus infection