Measurement and evaluation of the effects of pH gradients on the antimicrobial and antivirulence activities of chitosan nanoparticles in Pseudomonas aeruginosa

被引:30
作者
Aleanizy, Fadilah Sfouq [1 ,2 ]
Alqahtani, Fulwah Yahya [1 ,2 ]
Shazly, Gamal [2 ,3 ]
Alfaraj, Rihaf [2 ]
Alsarra, Ibrahim [2 ]
Alshamsan, Aws [1 ,4 ]
Abdulhady, Hosam Gareeb [5 ]
机构
[1] King Saud Univ, Coll Pharm, Dept Pharmaceut, Nanomed Res Unit, Riyadh, Saudi Arabia
[2] King Saud Univ, Coll Pharm, Dept Pharmaceut, Riyadh, Saudi Arabia
[3] Assiut Univ, Fac Pharm, Dept Ind Pharm, Assiut, Egypt
[4] King Saud Univ, King Abdullah Inst Nanotechnol, Riyadh, Saudi Arabia
[5] Taibah Univ, Coll Pharm, Biophys & Surface Anal, Almadinah Almunawarrah, Saudi Arabia
关键词
Chitosan nanoparticles; Pseudomonas aeruginosa; pH; Antimicrobial; Virulence; OUTER-MEMBRANE; BIOFILM FORMATION; DELIVERY;
D O I
10.1016/j.jsps.2017.10.009
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
Objective: The purpose of this study was to study the antimicrobial activity of chitosan nanoparticles (CSNPs) on Pseudomonas aeruginosa with special emphasis on their sensitivity to pH and the effect of pH on their activity. Methodology: Antimicrobial activity of CSNPs against Pseudomonas aeruginosa at different pH was tested using broth dilution method. Further assessment of antivirulence activity and sensitization of CSNPs on Pseudomonas aeruginosa were examined. Results: Significant antimicrobial effects of CSNPs against Pseudomonas aeruginosa were detected at slightly acidic pH 5, whereas the activity was abolished at a pH of greater than 7. The antivirulence activity of CSNPs was then investigated and treatment with CSNPs (1000 ppm) resulted in a significant reduction or even complete inhibition of pyocyanin production by P. aeruginosa compared with untreated P. aeruginosa indicating the antivirulence activity of CSNPs. CSNPs also sensitized P. aeruginosa to the lytic effects of sodium dodecyl sulfate (SDS); such sensitization was not blocked by washing chitosan-treated cells prior to SDS exposure revealing that CSNPs disturb the outer membrane leading to irreversible sensitivity to detergent even at low concentration (100 ppm). Conclusions: These findings highlight CSNPs as potentially useful as indirect antimicrobial agents for a variety of applications. (C) 2017 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University.
引用
收藏
页码:79 / 83
页数:5
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