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The ability of streptomycin-loaded chitosan-coated magnetic nanocomposites to possess antimicrobial and antituberculosis activities

Authors El Zowalaty ME, Hussein Al Ali SH, Husseiny MI, Geilich BM, Webster TJ, Hussein MZ

Received 17 September 2014

Accepted for publication 1 December 2014

Published 30 April 2015 Volume 2015:10(1) Pages 3269—3274

DOI https://doi.org/10.2147/IJN.S74469

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 4

Editor who approved publication: Dr Lei Yang

Mohamed Ezzat El Zowalaty,1,2 Samer Hassan Hussein Al Ali,3,4 Mohamed I Husseiny,2,5 Benjamin M Geilich,6,7 Thomas J Webster,7,8 Mohd Zobir Hussein9

1Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, Selangor Darul Ehsan, Malaysia; 2Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt; 3Laboratory of Molecular Biomedicine, Universiti Putra Malaysia, Selangor Darul Ehsan, Malaysia; 4Faculty of Pharmacy, Isra University, Amman, Jordan; 5Beckman Research Institute of City of Hope, Duarte, CA, USA; 6Department of Bioengineering, 7Department of Chemical Engineering, Northeastern University, Boston, MA, USA; 8Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia; 9Materials Synthesis and Characterization Laboratory, Institute of Advanced Technology; Universiti Putra Malaysia, Selangor Darul Ehsan, Malaysia

Abstract: Magnetic nanoparticles (MNPs) were synthesized by the coprecipitation of Fe2+ and Fe3+ iron salts in alkali media. MNPs were coated by chitosan (CS) to produce CS-MNPs. Streptomycin (Strep) was loaded onto the surface of CS-MNPs to form a Strep-CS-MNP nanocomposite. MNPs, CS-MNPs, and the nanocomposites were subsequently characterized using X-ray diffraction and were evaluated for their antibacterial activity. The antimicrobial activity of the as-synthesized nanoparticles was evaluated using different Gram-positive and Gram-negative bacteria, as well as Mycobacterium tuberculosis. For the first time, it was found that the nanoparticles showed antimicrobial activities against the tested microorganisms (albeit with a more pronounced effect against Gram-negative than Gram-positive bacteria), and thus, should be further studied as a novel nano-antibiotic for numerous antimicrobial and antituberculosis applications. Moreover, since these nanoparticle bacteria fighters are magnetic, one can easily envision magnetic field direction of these nanoparticles to fight unwanted microorganism presence on demand. Due to the ability of magnetic nanoparticles to increase the sensitivity of imaging modalities (such as magnetic resonance imaging), these novel nanoparticles can also be used to diagnose the presence of such microorganisms. In summary, although requiring further investigation, this study introduces for the first time a new type of magnetic nanoparticle with microorganism theranostic properties as a potential tool to both diagnose and treat diverse microbial and tuberculosis infections.

Keywords: iron oxide nanoparticles, chitosan, streptomycin, Mycobacterium tuberculosis, antimicrobial activity

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