Background: Chronic wounds, characterized by hypoxia, inflammation and impaired tissue remodeling, are often worsened by bacterial/fungal infections. Intriguingly, chitosan-shelled/decafluoropentane-cored oxygen-loaded nanodroplets (OLNs) have proven effective in delivering oxygen to hypoxic tissues. Aim: The present work aimed at investigating nanodroplet antimicrobial properties against methicillin-resistant Staphylococcus aureus (MRSA) or Candida albicans, toxicity on human keratinocytes (HaCaT) and ultrasound (US)-triggered transdermal delivery. Materials & methods: Nanodroplet antibacterial/antifungal properties, human cytotoxicity, and US-triggered transdermal delivery were measured through microbiological, biochemical, and sonophoresis assays, respectively. Results: OLNs and oxygen-free nanodroplets (OFNs) displayed short- or longterm cytostatic activity against MRSA or Candida albicans, respectively. OLNs were not toxic to keratinocytes, whereas OFNs slightly affected cell viability. Complementary US treatment promoted OLN transdermal delivery. Conclusion: As such, US-activated chitosan-shelled OLNs appear as promising, nonconventional and innovative tools for adjuvant treatment of infected chronic wounds.

Antimicrobial chitosan nanodroplets: New insights for ultrasound-mediated adjuvant treatment of skin infection [*G. Banche and M. Prato contributed equally to this work; ** M. Prato is the corresponding author]

BANCHE, Giuliana
First
;
PRATO, Mauro
Co-first
;
ALLIZOND, VALERIA;GIRIBALDI, Giuliana;ARGENZIANO, MONICA;KHADJAVI, AMINA;GULINO, GIULIA ROSSANA;FINESSO, NICOLE;MANDRAS, Narcisa;TULLIO, Viviana Cristina;CAVALLI, Roberta;GUIOT, Caterina;CUFFINI, Annamaria
Last
2015

Abstract

Background: Chronic wounds, characterized by hypoxia, inflammation and impaired tissue remodeling, are often worsened by bacterial/fungal infections. Intriguingly, chitosan-shelled/decafluoropentane-cored oxygen-loaded nanodroplets (OLNs) have proven effective in delivering oxygen to hypoxic tissues. Aim: The present work aimed at investigating nanodroplet antimicrobial properties against methicillin-resistant Staphylococcus aureus (MRSA) or Candida albicans, toxicity on human keratinocytes (HaCaT) and ultrasound (US)-triggered transdermal delivery. Materials & methods: Nanodroplet antibacterial/antifungal properties, human cytotoxicity, and US-triggered transdermal delivery were measured through microbiological, biochemical, and sonophoresis assays, respectively. Results: OLNs and oxygen-free nanodroplets (OFNs) displayed short- or longterm cytostatic activity against MRSA or Candida albicans, respectively. OLNs were not toxic to keratinocytes, whereas OFNs slightly affected cell viability. Complementary US treatment promoted OLN transdermal delivery. Conclusion: As such, US-activated chitosan-shelled OLNs appear as promising, nonconventional and innovative tools for adjuvant treatment of infected chronic wounds.
10
6
929
939
http://www.futuremedicine.com/loi/fmb
Candida albicans; chitosan; MRSA; nanodroplet; oxygen; skin; Microbiology; Microbiology (medical)
Giuliana Banche*; Prato, Mauro*,**; Magnetto, Chiara; Allizond, Valeria; Giribaldi, Giuliana; Argenziano, Monica; Khadjavi, Amina; Gulino, Giulia Rossana; Finesso, Nicole; Mandras, Narcisa; Tullio, Viviana; Cavalli, Roberta; Caterina, Guiot; Anna, Maria Cuffini
File in questo prodotto:
File Dimensione Formato  
Fut Microb_Banche 2015.pdf

Accesso riservato

Descrizione: Articolo principale
Tipo di file: PDF EDITORIALE
Dimensione 1.77 MB
Formato Adobe PDF
1.77 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
FutMicrobiol_2015.pdf

Accesso aperto con embargo fino al 01/06/2016

Descrizione: Articolo principale
Tipo di file: POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione 2.58 MB
Formato Adobe PDF
2.58 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1521045
Citazioni
  • ???jsp.display-item.citation.pmc??? 11
  • Scopus 27
  • ???jsp.display-item.citation.isi??? 27
social impact