Journal
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 49, Issue -, Pages 183-189Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.msec.2014.12.078
Keywords
Tellurium nanorods; Biosynthesis; Pseudomonas pseudoalcaligenes; Cytotoxicity; Potassium tellurite
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Funding
- Kerman University of Medical Sciences (Kerman, Iran)
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The present study was designed to isolate bacterial strain capable of tellurium nanorods (Te NRs) production followed by purification and evaluation of the cytotoxic effect of Te NRs. Among 25 environmental samples collected for screening of Te NR-producer bacterial strains one bacterial colony (isolated from hot spring and identified as Pseudomonas pseudoalcaligenes strain Te) was selected and applied for biosynthesis of Te NRs. Thereafter, an organic-aqueous partitioning system was applied for the purification of the biogenic Te NRs and the purified Te NRs were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), X-ray diffraction spectroscopy (XRD), UV-visible spectroscopy, and Fourier transform infrared spectroscopy (FTIR) techniques. The cytotoxic effect of biologically synthesized Te NRs and potassium tellurite on four cell lines of MCF-7, HT1080, HepG2 and A549 was then determined using the MTT assay method. The obtained results revealed lower toxicity for the rod-shaped biogenic tellurium nanostructures (similar to 22 nm diameter by 185 nm length) compared to K2TeO3. (C) 2014 Elsevier B.V. All rights reserved.
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