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Anticancer activity of biostabilized selenium nanorods synthesized by Streptomyces bikiniensis strain Ess_amA-1

Authors Ahmad M, Yasser M, Sholkamy E, Ali AM, Mehanni M

Received 12 February 2015

Accepted for publication 18 March 2015

Published 6 May 2015 Volume 2015:10(1) Pages 3389—3401


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Prof. Dr. Thomas J. Webster

Maged Sayed Ahmad,1 Manal Mohamed Yasser,1 Essam Nageh Sholkamy,1,2 Ali Mohamed Ali,3,4 Magda Mohamed Mehanni3

1Department of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef, Egypt; 2Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia; 3Department of Botany and Microbiology, College of Science, Minia University, El-Minia, Egypt; 4Department of Biological Sciences, College of Science, King Faisal University, Saudi Arabia

Abstract: Selenium is an important component of human diet and a number of studies have declared its chemopreventive and therapeutic properties against cancer. However, very limited studies have been conducted about the properties of selenium nanostructured materials in comparison to other well-studied selenospecies. Here, we have shown that the anticancer property of biostabilized selenium nanorods (SeNrs) synthesized by applying a novel strain Ess_amA-1 of Streptomyces bikiniensis. The strain was grown aerobically with selenium dioxide and produced stable SeNrs with average particle size of 17 nm. The optical, structural, morphological, elemental, and functional characterizations of the SeNrs were carried out using techniques such as UV-vis spectrophotometry, transmission electron microscopy, energy dispersive X-ray spectrometry, and Fourier transform infrared spectrophotometry, respectively. The MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay revealed that the biosynthesized SeNrs induces cell death of Hep-G2 and MCF-7 human cancer cells. The lethal dose (LD50%) of SeNrs on Hep-G2 and MCF-7 cells was recorded at 75.96 µg/mL and 61.86 µg/mL, respectively. It can be concluded that S. bikiniensis strain Ess_amA-1 could be used as renewable bioresources of biosynthesis of anticancer SeNrs. A hypothetical mechanism for anticancer activity of SeNrs is also proposed.

Keywords: biosynthesis, selenium nanorods, Streptomyces, anticancer activity

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