Thermally triggered release of the bacteriophage endolysin CHAP_K and the bacteriocin lysostaphin for the control of methicillin resistant Staphylococcus aureus (MRSA)

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• 作者：Hollie Hathaway^a ; Jude Ajuebor^b ; Liam Stephens^a ; Aidan Coffey^b ; Ursula Potter^c ; J. Mark Sutton^d ; A. Toby A. Jenkins^a ; ^{a.t.a.jenkins@bath.ac.uk}
• 关键词：PNIPAM ; Bacteriophage endolysin ; Bacteriocin ; Thermal release
• 刊名：Journal of Controlled Release
• 出版年：2017
• 出版时间：10 January 2017
• 年：2017
• 卷：245
• 期：Complete
• 页码：108-115
• 全文大小：1793 K
• 卷排序：245

文摘

Staphylococcus aureus infections of the skin and soft tissue pose a major concern to public health, largely owing to the steadily increasing prevalence of drug resistant isolates. As an alternative mode of treatment both bacteriophage endolysins and bacteriocins have been shown to possess antimicrobial efficacy against multiple species of bacteria including otherwise drug resistant strains. Despite this, the administration and exposure of such antimicrobials should be restricted until required in order to discourage the continued evolution of bacterial resistance, whilst maintaining the activity and stability of such proteinaceous structures. Utilising the increase in skin temperature during infection, the truncated bacteriophage endolysin CHAPK and the staphylococcal bacteriocin lysostaphin have been co-administered in a thermally triggered manner from Poly(N-isopropylacrylamide) (PNIPAM) nanoparticles. The thermoresponsive nature of the PNIPAM polymer has been employed in order to achieve the controlled expulsion of a synergistic enzybiotic cocktail consisting of CHAPK and lysostaphin. The point at which this occurs is modifiable, in this case corresponding to the threshold temperature associated with an infected wound. Consequently, bacterial lysis was observed at 37 °C, whilst growth was maintained at the uninfected skin temperature of 32 °C.