Clearance of mixed biofilms of Streptococcus pneumoniae and methicillin-susceptible/resistant Staphylococcus aureus by antioxidants N-acetyl-L-cysteine and cysteamine.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
23 04 2022
23 04 2022
Historique:
received:
14
10
2021
accepted:
07
04
2022
entrez:
24
4
2022
pubmed:
25
4
2022
medline:
27
4
2022
Statut:
epublish
Résumé
Biofilm-associated infections are of great concern because they are associated with antibiotic resistance and immune evasion. Co-colonization by Staphylococcus aureus and Streptococcus pneumoniae is possible and a threat in clinical practice. We investigated the interaction between S. aureus and S. pneumoniae in mixed biofilms and tested new antibiofilm therapies with antioxidants N-acetyl-L-cysteine (NAC) and cysteamine (Cys). We developed two in vitro S. aureus-S. pneumoniae mixed biofilms in 96-well polystyrene microtiter plates and we treated in vitro biofilms with Cys and NAC analyzing their effect by CV staining and viable plate counting. S. pneumoniae needed a higher proportion of cells in the inoculum and planktonic culture to reach a similar population rate in the mixed biofilm. We demonstrated the effect of Cys in preventing S. aureus biofilms and S. aureus-S. pneumoniae mixed biofilms. Moreover, administration of 5 mg/ml of NAC nearly eradicated the S. pneumoniae population and killed nearly 94% of MSSA cells and 99% of MRSA cells in the mixed biofilms. The methicillin resistance background did not change the antioxidants effect in S. aureus. These results identify NAC and Cys as promising repurposed drug candidates for the prevention and treatment of mixed biofilms by S. pneumoniae and S. aureus.
Identifiants
pubmed: 35461321
doi: 10.1038/s41598-022-10609-x
pii: 10.1038/s41598-022-10609-x
pmc: PMC9035182
doi:
Substances chimiques
Anti-Bacterial Agents
0
Antioxidants
0
Cysteamine
5UX2SD1KE2
Methicillin
Q91FH1328A
Acetylcysteine
WYQ7N0BPYC
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
6668Informations de copyright
© 2022. The Author(s).
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