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In Vitro and in Vivo Antistaphylococcal Activity Determination of the New Recombinant Lysostaphin Protein #MMPMID27217919
Abtahi H; Farhangnia L; Ghaznavi-Rad E
Jundishapur J Microbiol 2016[Mar]; 9 (3): ä PMID27217919show ga
Background:: Bacterial infection by antibiotic-resistant Staphylococcus aureus strains is a worldwide concern and the development of novel antistaphylococcal agents is acutely needed. Lysostaphin, an example of such novel agents, is a bacteriocin secreted by S. simulans to kill S. aureus through proteolysis of the Staphylococcus cell wall. Objectives:: The aim of this study was to evaluate the in vitro and in vivo antistaphylococcal activity of recombinant lysostaphin. Materials and Methods:: The in vitro study of the recombinant lysostaphin activity against S. aureus was determined by turbidimetric assay. For in vivo investigation, two groups of rats were inoculated with 1.4 × 109 CFU S. aureus. Five days after the nasal instillation of S. aureus, treatment in one of the groups was performed with a single dose (200 ?g/dose) of recombinant lysostaphin formulated in Eucerin-based cream. Results:: Recombinant lysostaphin at 100 ?g/mL concentration showed a significant decrease of the optical density compared to the control samples. The in vivo study demonstrated that a single dose (200 ?g/dose) of recombinant lysostaphin cream significantly reduced nasal colonization in all the treated animals compared to the untreated ones. Conclusions:: These results demonstrated that the recombinant lysostaphin produced in this study was able to kill nasal S. aureus in rats. It can be recommended for human clinical trial studies.