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Efficacy of poly(lactic acid)/carvacrol electrospun membranes against Staphylococcus aureus and Candida albicans in single and mixed cultures

  • Applied microbial and cell physiology
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Abstract

Carvacrol (CAR) is one of the most promising essential oil components with antimicrobial activity. New technologies aimed to incorporate this active molecule into carrier matrix to improve the stability and prolong the biological activity. The goal of this study was to investigate the feasibility of incorporating CAR into electrospun membranes of poly(lactic acid) (PLA) for potential applications as active antimicrobial system. To this end, PLA membranes containing homogeneously dispersed CAR were successfully prepared and a series of systematic tests including morpho-mechanical properties, in vitro release rate, and antimicrobial/antibiofilm activities against Staphylococcus aureus and Candida albicans were carried out. The results revealed that CAR has a good compatibility with PLA and acts as a plasticizer, improving flexibility and extensibility of the matrix. The gradual release of CAR from PLA membranes warranted a significant antimicrobial activity up to 144 h and reduced the biofilm production by 92–96 and 88–95% of S. aureus and C. albicans in single and mixed cultures. A strong decrease of cell count, biomass, metabolic activity, and vitality of established 24- and 48-h biofilms were also demonstrated. In conclusion, this work highlights the potential of electrospun nanofibrous membranes as efficient stabilizers-carriers of CAR and opens up interesting perspectives on the use of this system as new tool for skin and wound bacterial–fungal infections.

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Authors and Affiliations

  1. Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali, Viale delle Scienze Ed. 6, RU INSTM, Università di Palermo, 90128, Palermo, Italy

    Roberto Scaffaro & Francesco Lopresti

  2. Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche e Ambientali, Polo Annunziata, Università degli Studi di Messina, 98168, Messina, Italy

    Manuela D’Arrigo, Andreana Marino & Antonia Nostro

Authors
  1. Roberto Scaffaro
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  2. Francesco Lopresti
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  3. Manuela D’Arrigo
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  4. Andreana Marino
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  5. Antonia Nostro
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Correspondence to Antonia Nostro.

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Scaffaro, R., Lopresti, F., D’Arrigo, M. et al. Efficacy of poly(lactic acid)/carvacrol electrospun membranes against Staphylococcus aureus and Candida albicans in single and mixed cultures. Appl Microbiol Biotechnol 102, 4171–4181 (2018). https://doi.org/10.1007/s00253-018-8879-7

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  • DOI: https://doi.org/10.1007/s00253-018-8879-7

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