Does the Type Matter? Verification of Different Tea Types’ Potential in the Synthesis of SeNPs

Sentkowska, Aleksandra; Pyrzyńska, Krystyna

doi:10.3390/antiox11122489

Cited by 7 publications

(2 citation statements)

References 48 publications

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“…According to the method in the research report by Smirnoff and Cumbes [46], the scavenging activity of selenium nanoparticles against hydroxyl radicals was determined. First, 1 mL SeNPs solution was added to a reaction mixture containing 1 mL iron sulphate (1.5 × 10 −3 mol L −1 ), 0.7 mL hydrogen peroxide (6 × 10 −3 mol L −1 ), and 0.3 mL sodium salicylate (2 × 10 −2 mol L −1 ).…”

Section: Hydroxyl Scavenging Assaymentioning

confidence: 99%

Biological Selenite Reduction, Characterization and Bioactivities of Selenium Nanoparticles Biosynthesised by Pediococcus acidilactici DSM20284

Wang

Kuang

et al. 2023

Molecules

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Selenium (Se) is in great demand as a health supplement due to its superior reactivity and excellent bioavailability, despite selenium nanoparticles (SeNPs) having signs of minor toxicity. At present, the efficiency of preparing SeNPs using lactic acid bacteria is unsatisfactory. Therefore, a probiotic bacterial strain that is highly efficient at converting selenite to elemental selenium is needed. In our work, four selenite-reducing bacteria were isolated from soil samples. Strain LAB-Se2, identified as Pediococcus acidilactici DSM20284, had a reduction rate of up to 98% at ambient temperature. This strain could reduce 100 mg L−1 of selenite to elemental Se within 48 h at pH 4.5–6.0, a temperature of 30–40 °C, and a salinity of 1.0–6.5%. The produced SeNPs were purified, freeze-dried, and subsequently systematically characterised using FTIR, DSL, SEM-EDS, and TEM techniques. SEM-EDS analysis proved the presence of selenium as the foremost constituent of SeNPs. The strain was able to form spherical SeNPs, as determined by TEM. In addition, DLS analysis confirmed that SeNPs were negatively charged (−26.9 mV) with an average particle size of 239.6 nm. FTIR analysis of the SeNPs indicated proteins and polysaccharides as capping agents on the SeNPs. The SeNPs synthesised by P. acidilactici showed remarkable antibacterial activity against E. coli, B. subtilis, S. aureus, and K. pneumoniae with inhibition zones of 17.5 mm, 13.4 mm, 27.9 mm, and 16.2 mm, respectively; they also showed varied MIC values in the range of 15–120 μg mL−1. The DPPH, ABTS, and hydroxyl, and superoxide scavenging activities of the SeNPs were 70.3%, 72.8%, 95.2%, and 85.7%, respectively. The SeNPs synthesised by the probiotic Lactococcus lactis have the potential for safe use in biomedical and nutritional applications.

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Section: Hydroxyl Scavenging Assaymentioning

confidence: 99%

Biological Selenite Reduction, Characterization and Bioactivities of Selenium Nanoparticles Biosynthesised by Pediococcus acidilactici DSM20284

Wang

Kuang

et al. 2023

Molecules

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“…The secondary plant metabolites act as selenium reducers but also prevent the aggregation of NPs and promote the production of smaller particles. Green synthesis of SeNPs using aqueous tea extracts has also been used [29][30][31]. The obtained selenium nanoparticles showed a greater ability to neutralize hydroxyl radicals compared to tea extracts [29].…”

Section: Introductionmentioning

confidence: 99%

Catechins and Selenium Species—How They React with Each Other

Sentkowska,

Pyrzynska

2023

Molecules

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The combination of selenium and tea infusion, both with antioxidant properties, has potentially complementary mechanisms of action. Se-enriched tea has been considered as a possible Se supplement and a functional beverage to reduce the health risk of Se deficiency. This work investigated the interactions between plant catechins present in tea infusions and selenium species based on changes in the concentration of both reagents, their stability in aqueous solutions, and the possibilities of selenonanoparticles (SeNPs) formation. Selenium species exhibited instability both alone in their standard solutions and in the presence of studied catechins; selenocystine appeared as the most unstable. The recorded UV–Vis absorption spectra indicated the formation of SeNPs in the binary mixtures of catechins and selenite. SeNPs have also formed with diameters smaller than 100 nm when selenite and selenomethionine were added to tea infusions. This is an advantage from the point of view of potential medical applications.

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Enhancing the therapeutic landscape of cutaneous leishmaniasis: pegylated liposomal delivery of miltefosine for controlled release and improved efficacy

Alharthi,

Abdullah Alrashidi,

Alavi

et al. 2024

Journal of Drug Delivery Science and Technology

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Does the Type Matter? Verification of Different Tea Types’ Potential in the Synthesis of SeNPs

Cited by 7 publications

References 48 publications

Biological Selenite Reduction, Characterization and Bioactivities of Selenium Nanoparticles Biosynthesised by Pediococcus acidilactici DSM20284

Biological Selenite Reduction, Characterization and Bioactivities of Selenium Nanoparticles Biosynthesised by Pediococcus acidilactici DSM20284

Catechins and Selenium Species—How They React with Each Other

Enhancing the therapeutic landscape of cutaneous leishmaniasis: pegylated liposomal delivery of miltefosine for controlled release and improved efficacy

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