Antialgal and antiproliferative activities of the algal silver nanoparticles against the toxic cyanobacterium Microcystis aeruginosa and human tumor colon cell line

El‐Sheekh, Mostafa M.; Alwaleed, Eman A.; Kassem, Wafaa M.A.; Saber, Hani

doi:10.1016/j.enmm.2020.100352

Cited by 4 publications

(2 citation statements)

References 46 publications

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“…Characterization of Ag-NPs was performed as described previously by Saber et al 32 and El-Sheekh et al 33 Ag-NP morphology was measured with transmission electron microscopy (TEM) JEOL 2010. Dynamic light scattering (DLS) was used for measuring size distribution, and potential was assessed using Zetasizer Nano compact scattering (Malvern Instruments).…”

Section: Methodsmentioning

confidence: 99%

Control of Virulent Listeria monocytogenes Originating from Dairy Products and Cattle Environment Using Marine Algal Extracts, Silver Nanoparticles Thereof, and Quaternary Disinfectants

El‐Zamkan

Hendy

Diab

et al. 2021

IDR

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Introduction: Listeria monocytogenes is an important foodborne pathogen of public-and animalhealth concern globally. The persistence of L. monocytogenes in the dairy-processing environment has multifactorial causes, including lack of hygiene, inefficient cleaning, and improper disinfection practices. Materials and Methods: A total of 300 dairy-product and environmental samples were collected from dairy-cattle facilities and local dairy shops and vendors in Qena, Egypt. Samples were screened for the incidence of Listeria spp. and to detect virulence determinants and disinfectant-resistance genes. Three marine algal species -Caulerpa racemosa, Jania rubens, and Padina pavonica -were collected from Hurghada on the Red Sea coast. Algal extracts were screened using gas chromatography-mass spectrometry. The antimicrobial activity of some marine algal extracts, nanoparticles derived therefrom, and some disinfectants against L. monocytogenes strains were assessed in vitro using agar-well diffusion and liquid-broth methods. The impact of P. pavonica extract on the growth and survival of virulent L. monocytogenes in cheese and whey were clarified. Results and Discussion: The incidence of L. monocytogenes in dairy products and environmental samples was 15.5% and 19%, respectively. The most common toxigenic gene profile found among the isolates was hlyA + -inlA + -prfA + . The sensitivity pattern of L. monocytogenes strains to disinfectant containing alkyl (C 12-16 ) dimethyl BAC was high compared to other tested quaternary ammonium compounds (QAC) disinfectants tested, which showed lower log reductions against resistant strains. The QAC disinfectant-resistance gene qacH was detected in 40% of the isolates. Potent bactericidal activity of a petroleum ether extract of P. pavonica and silver nanoparticles of P. pavonica were obtained against the virulent L. monocytogenes strain. The population of L. monocytogenes in cheese curd and whey after 14 days was reduced at a rate of 9 log CFU/g and 8 log CFU/mL, respectively due to the effect of P. pavonica extract. After 28 days of storage, L. monocytogenes was completely inactivated in those dairy products. Conclusion: P. pavonica extract showed promising antimicrobial properties, calling for further comprehensive studies prior to it being applied in the food industry to enhance the safety, quality, and shelf life of products and protect public health.

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Section: Methodsmentioning

confidence: 99%

Control of Virulent Listeria monocytogenes Originating from Dairy Products and Cattle Environment Using Marine Algal Extracts, Silver Nanoparticles Thereof, and Quaternary Disinfectants

El‐Zamkan

Hendy

Diab

et al. 2021

IDR

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“…Silver NPs biosynthesized using four different marine macroalgae ( Turbinaria decurrens , J. rubens , Sargassum cinereum , and Caulerpa racemose ) exhibited anti-proliferative effects in human colorectal carcinoma (HCT116) cells. However, no effects were observed in the normal retina cells (RPE1) [ 259 ]. Silver and gold NPs synthesized using two different microalgae ( Oscillatoria sp.…”

Section: Application Of Green Nps As An Anti-cancer Agentmentioning

confidence: 99%

Marine Macroalgae Display Bioreductant Efficacy for Fabricating Metallic Nanoparticles: Intra/Extracellular Mechanism and Potential Biomedical Applications

Ansari

Saquib

Matteis

et al. 2021

Bioinorganic Chemistry and Applications

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The application of hazardous chemicals during nanoparticle (NP) synthesis has raised alarming concerns pertaining to their biocompatibility and equally to the environmental harmlessness. In the recent decade, nanotechnological research has made a gigantic shift in order to include the natural resources to produce biogenic NPs. Within this approach, researchers have utilized marine resources such as macroalgae and microalgae, land plants, bacteria, fungi, yeast, actinomycetes, and viruses to synthesize NPs. Marine macroalgae (brown, red, and green) are rich in polysaccharides including alginates, fucose-containing sulfated polysaccharides (FCSPs), galactans, agars or carrageenans, semicrystalline cellulose, ulvans, and hemicelluloses. Phytochemicals are abundant in phenols, tannins, alkaloids, terpenoids, and vitamins. However, microorganisms have an abundance of active compounds ranging from sugar molecules, enzymes, canonical membrane proteins, reductase enzymes (NADH and NADPH), membrane proteins to many more. The prime reason for using the aforesaid entities in the metallic NPs synthesis is based on their intrinsic properties to act as bioreductants, having the capability to reduce and cap the metal ions into stabilized NPs. Several green NPs have been verified for their biocompatibility in human cells. Bioactive constituents from the above resources have been found on the green metallic NPs, which has demonstrated their efficacies as prospective antibiotics and anti-cancer agents against a range of human pathogens and cancer cells. Moreover, these NPs can be characterized for the size, shapes, functional groups, surface properties, porosity, hydrodynamic stability, and surface charge using different characterization techniques. The novelty and originality of this review is that we provide recent research compilations on green synthesis of NPs by marine macroalgae and other biological sources (plant, bacteria, fungi, actinomycetes, yeast, and virus). Besides, we elaborated on the detailed intra- and extracellular mechanisms of NPs synthesis by marine macroalgae. The application of green NPs as anti-bacterial, anti-cancer, and popular methods of NPs characterization techniques has also been critically reviewed.

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The efficient role of algae as green factories for nanotechnology and their vital applications

El‐Sheekh

Morsi²,

Hassan³

et al. 2022

Microbiological Research

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Antialgal and antiproliferative activities of the algal silver nanoparticles against the toxic cyanobacterium Microcystis aeruginosa and human tumor colon cell line

Cited by 4 publications

References 46 publications

Control of Virulent Listeria monocytogenes Originating from Dairy Products and Cattle Environment Using Marine Algal Extracts, Silver Nanoparticles Thereof, and Quaternary Disinfectants

Control of Virulent Listeria monocytogenes Originating from Dairy Products and Cattle Environment Using Marine Algal Extracts, Silver Nanoparticles Thereof, and Quaternary Disinfectants

Marine Macroalgae Display Bioreductant Efficacy for Fabricating Metallic Nanoparticles: Intra/Extracellular Mechanism and Potential Biomedical Applications

The efficient role of algae as green factories for nanotechnology and their vital applications

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