Biosynthesis of Selenium Nanoparticles (via Bacillus subtilis BSN313), and Their Isolation, Characterization, and Bioactivities

• Published in: Molecules (Basel, Switzerland) Switzerland), 2021-09, Vol.26 (18), p.5559
• Main Authors: Ullah, Asad, Yin, Xian, Wang, Fenghuan, Xu, Bo, Mirani, Zulfiqar Ali, Xu, Baocai, Chan, Malik Wajid Hussain, Ali, Amjad, Usman, Muhammad, Ali, Nawazish, Naveed, Muhammad
• Format: Article
• Language: English
• Subjects: Anti-Bacterial Agents - biosynthesis; Anti-Bacterial Agents - chemistry; Anti-Bacterial Agents - pharmacology; antibacterial; Antiinfectives and antibacterials; antioxidant; Antioxidants; Antioxidants - chemistry; Antioxidants - pharmacology; Bacillus subtilis; Bacillus subtilis - drug effects; Bacillus subtilis BSN313; Bacteria; Bioavailability; Biocompatibility; Biosynthesis; Cancer; Carbohydrates; E coli; Electrophoretic mobility; Metal Nanoparticles - chemistry; Microbial Sensitivity Tests; Microscopy; Nanoparticles; Nanoparticles - chemistry; Particle Size; probiotic; Probiotics; Pseudomonas aeruginosa; Scavenging; Selenium; Selenium - chemistry; SeNPs; Toxicity; Trace elements; Zeta potential
• ISSN: 1420-3049; 1420-3049
• DOI: 10.3390/molecules26185559

Among the trace elements, selenium (Se) has great demand as a health supplement. Compared to its other forms, selenium nanoparticles have minor toxicity, superior reactivity, and excellent bioavailability. The present study was conducted to produce selenium nanoparticles (SeNPs) via a biosynthetic approach using probiotic BSN313 in an economical and easy manner. The BSN313 exhibited a gradual increase in Se reduction and production of SeNPs up to 5-200 µg/mL of its environmental Se. However, the capability was decreased beyond that concentration. The capacity for extracellular SeNP production was evidenced by the emergence of red color, then confirmed by a microscopic approach. Produced SeNPs were purified, freeze-dried, and subsequently characterized systematically using UV-Vis spectroscopy, FTIR, Zetasizer, SEM-EDS, and TEM techniques. SEM-EDS analysis proved the presence of selenium as the foremost constituent of SeNPs. With an average particle size of 530 nm, SeNPs were shown to have a -26.9 (mV) zeta potential and -2.11 µm cm/Vs electrophoretic mobility in water. SeNPs produced during both the 24 and 48 h incubation periods showed good antioxidant activity in terms of DPPH and ABST scavenging action at a concentration of 150 µg/mL with no significant differences ( > 0.05). Moreover, 200 µg/mL of SeNPs showed antibacterial reactivity against ATCC 8739, ATCC 9027, and ATCC 25923. In the future, this work will be helpful to produce biogenic SeNPs using probiotic BSN313 as biofactories, with the potential for safe use in biomedical and nutritional applications.