Low-temperature plasma: An effective approach against Candida albicans biofilm

Juliana Aparecida Delben, Ramiro Mendonça Murata, Xi Wei, Myrella Lessio Castro, Wirley Gonçalves Assunção, Nelson Renato França Alves da Silva, Simone Duarte

    Research output: Contribution to journalArticlepeer-review

    Abstract

    This study evaluated the antifungal potential of low-temperature plasma (LTP) on a 72-hour Candida albicans biofilm. A growth inhibition zone test was conducted with agar plates inoculated with C. albicans and submitted to LTP and argon application at 3 and 10 mm for 10, 30, 60, 90, and 120 seconds. The groups for biofilm assays were 60 seconds of LTP application with a tip-to-sample distance of 3 mm (LTP-3) and 10 mm (LTP-10); –application of only argon gas for 60 seconds with a tip-to-sample distance of 3 mm (Ar-3) and 10 mm (Ar-10); and no treatment. The C. albicans biofilm was grown on saliva-coated discs. The medium was replaced every 24 hours. Confocal laser scanning microscopy revealed the proportion of live and dead cells, and variable pressure scanning electron microscopy (VPSEM) showed biofilm/cell structure. No inhibition zone was observed for control and either Ar groups. For the LTP groups, a progressively increasing of inhibition zone diameter was observed for different treatment durations. The LTP-3 and LTP-10 groups presented higher proportions of dead cells compared with the Ar-3 and Ar-10 groups. VPSEM revealed cell perforations in the LTP-3 and LTP-10 groups. A short period of LTP exposure demonstrated an antifungal effect on C. albicans biofilm.

    Original languageEnglish (US)
    Pages (from-to)231-244
    Number of pages14
    JournalPlasma Medicine
    Volume4
    Issue number1-4
    DOIs
    StatePublished - 2014

    Keywords

    • Candida albicans
    • Low-temperature plasma
    • Oral biofilm

    ASJC Scopus subject areas

    • Biomedical Engineering
    • General Physics and Astronomy

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