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Original Research

Egypt. J. Phycol.. 2019; 20(1): 1-28


Characterization of spirugenic iron oxide nanoparticles and their antibacterial activity against multidrug-resistant Helicobacter pylori

sherin M.A. Sharaf, Heba Salah Abbas, Tarek A.M. Ismaeil.

Abstract
In the present study, spirugenic iron oxide nanoparticles (SIONs) were biosynthesized using a new simple, expeditious and benign approach which was achieved by combining ferric chloride with Spirulina platensis water extract. SIONs were inspected using UV spectroscopy on 290nm. The Transmission Electron Microscope (TEM) recorded a rod-shaped particle with an average width of 31.04 nm and length 137.51nm. X-Ray Diffractometer (XRD) showed a cubic spinel phase of -Fe2O3 (maghemite). Furthermore, SIONs exhibited good antibacterial activity against multidrug-resistant Helicobacter pylori. Our study demonstrated that the Minimum Inhibitory Concentration (MIC) of SIONs against H. pylori was 3.2 g/ml. TEM image showed the cell raptures of H. pylori indicating fragmented cell membrane and leakage of bacterial components in those culture treated by SIONs. MTT assay revealed that SIONs have no adverse effect on human epithelial cell line so it may be used safely as a natural product. The use of S. platensis as a nanofactory for the IONs synthesis could have a great role as a treatment of H. pylori infection in the future.

Key words: H. pylori, Iron oxide nanoparticles, S. platensis, green biotechnology, antibacterial resistance.



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