Mevalonolactone: An Inhibitor of Staphylococcus Epidermidis Adherence and Biofilm Formation
Ana Lúcia Antunes,
Amelia Terezinha Henriques,
Alexandre Jose Jose Macedo.
Staphylococcus epidermidis, a commensal microorganism at the human skin and mucosae, is nowadays considered
an important opportunistic pathogen related to nosocomial infections on indwelling medical devices due biofilm formation.
Bacterial biofilms are the worst aspect in the treatment of infections and now efforts have been made in the search
for new molecular entities to overcome this situation. In this work, a compound isolated from marine associated fungi was
capable to interfere with the adherence and biofilm formation of S. epidermidis. This compound, identified as mevalonolactone,
showed significant inhibition of S. epidermidis ATCC 35984 biofilm formation, without antibacterial activity,
evaluated by crystal violet assay, turbidimetric assay and scanning electron microscopy. When assayed against 12 clinical
isolates of S. epidermidis, this compound exhibited both biofilm inhibition and antimicrobial activity, but no activity
against gram-negative bacteria was observed. Therefore, when this constitutive molecule is added in the antibiofilm and
antibacterial assays, it might act as an important agent against this pathogen, contributing to the arsenal of antibiofilm
Keywords: Sordariales, mevalonolactone, Staphylococcus epidermidis, biofilm inhibition.
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