scholarly journals Silver nanoparticles outperform gold nanoparticles in radiosensitizing U251 cells in vitro and in an intracranial mouse model of glioma

2016 ◽  
Vol Volume 11 ◽  
pp. 5003-5014 ◽  
Author(s):  
Pei Dang Liu ◽  
Haizhen Jin ◽  
Zhirui Guo ◽  
Jun Ma ◽  
Jing Zhao ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Silver Nanoparticles ◽  
Mouse Model ◽  
U251 Cells

scholarly journals Biogenic silver nanoparticles induce apoptosis in Ehrlich ascites carcinoma

2020 ◽  
Vol 7 (11) ◽  
pp. 4100-4113
Author(s):  
Hamed A. Abosharaf ◽  
Mohammed Salah ◽  
Thoria Diab ◽  
Motonari Tsubaki ◽  
Tarek M. Mohamed
Keyword(s):  
Silver Nanoparticles ◽  
Mouse Model ◽  
Combined Treatment ◽  
Ehrlich Ascites Carcinoma ◽  
Ehrlich Ascites ◽  
Liver And Kidney ◽  
Mango Leaves ◽  
Eac Cells

Introduction: Plant-mediated synthesis of silver nanoparticles (AgNPs) is accounted as an ecofriendly process. The present study was conducted to estimate the potency of biogenic AgNPs against Ehrlich ascites carcinoma (EAC) cells in vitro and EAC-bearing mice in vivo. Methods: AgNPs were prepared using mango leaves extract and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscopy (TEM). Ehrlich ascites carcinoma (EAC) mouse model was established by intraperitoneal injection of 1 x 106 EAC cells. Biogenic AgNPs- alone or combined with Doxorubicin (DOX)- was administered intraperitoneally day by day for two weeks. Results: Biologically synthesized AgNPs showed a cytotoxic effect against cultured EAC cells but with less toxicity toward normal cells compared to DOX, which had strong cytotoxicity against both cells. Biogenic AgNPs alone or combined with DOX triggered the cytotoxicity against the EAC-bearing mouse model via decreasing body weight, tumor volume, and the number of viable tumor cells. The combined treatment (AgNPs-DOX) ameliorated the drastic effect induced by injection of EAC cells through improving liver and kidney functions compared to those treated with DOX alone. In addition, the combined treatment showed an elevation in the expression of Bax and caspase-3, and a reduction in the expression of Bcl-2 protein in the EAC cells. Furthermore, this combined treatment effectively arrested the cell cycle at the G0/G1 phase. Moreover, the combined treatment with AgNPs-DOX caused a significant reduction in the activity of ornithine decarboxylase (ODC). Conclusion: These findings suggest that biogenic AgNPs could be useful in developing a potent combination therapy against different types of cancers.

In vitro evaluation of bactericidal effect of silver and gold-silver nanoparticles coated with silicon dioxide on Xanthomonas fragariae

MRS Advances ◽  
2017 ◽  
Vol 2 (49) ◽  
pp. 2683-2688
Author(s):  
Juana-Cristina Ibarra-Arán ◽  
Douglas Rodríguez-Martínez ◽  
Eugenio Rodríguez-González ◽  
Jesús-Roberto González-Castillo
Keyword(s):  
Gold Nanoparticles ◽  
Silver Nanoparticles ◽  
Surface Plasmon Resonance ◽  
Laser Ablation ◽  
Silicon Dioxide ◽  
Minimum Bactericidal Concentration ◽  
Bactericidal Effect ◽  
Gold Silver ◽  
Xanthomonas Fragariae

ABSTRACTIn this work it was evaluated the bactericidal effect of silver and silver-gold nanoparticles coated with silicon dioxide on Xanthomonas fragariae. Nanoparticles were synthesized by combining laser ablation and chemical synthesis techniques. Irradiating the samples at the same wavelength where nanoparticles exhibit its maximum absorbance is possible to photo induce the bactericidal effect by detonating the surface plasmon resonance. The results showed that the minimum bactericidal concentration (MBC) of silver nanoparticles was 16 μM (referred to [AgNO3]) and for silver-gold nanoparticles were 32 μM (referred to [AgNO3-HAuCl4]) at 60 minutes of irradiation.

scholarly journals Exacerbation of Thrombotic Responses to Silver Nanoparticles in Hypertensive Mouse Model

2022 ◽  
Vol 2022 ◽  
pp. 1-10
Author(s):  
Zannatul Ferdous ◽  
Sumaya Beegam ◽  
Nur E. Zaaba ◽  
Ozaz Elzaki ◽  
Saeed Tariq ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Silver Nanoparticles ◽  
Platelet Aggregation ◽  
Mouse Model ◽  
Saline Control ◽  
Induced Response ◽  
Stress Effect ◽  
Pial Arterioles

With advent of nanotechnology, silver nanoparticles, AgNPs owing majorly to their antibacterial properties, are used widely in food industry and biomedical applications implying human exposure by various routes including inhalation. Several reports have suggested AgNPs induced pathophysiological effects in a cardiovascular system. However, cardiovascular diseases such as hypertension may interfere with AgNPs-induced response, yet majority of them are understudied. The aim of this work was to evaluate the thrombotic complications in response to polyethylene glycol- (PEG-) coated AgNPs using an experimental hypertensive (HT) mouse model. Saline (control) or PEG-AgNPs (0.5 mg/kg) were intratracheally (i.t.) instilled four times, i.e., on days 7, 14, 21, and 28 post-angiotensin II-induced HT, or vehicle (saline) infusion. On day 29, various parameters were assessed including thrombosis in pial arterioles and venules, platelet aggregation in whole blood in vitro, plasma markers of coagulation, and fibrinolysis and systemic oxidative stress. Pulmonary exposure to PEG-AgNPs in HT mice induced an aggravation of in vivo thrombosis in pial arterioles and venules compared to normotensive (NT) mice exposed to PEG-AgNPs or HT mice given saline. The prothrombin time, activated partial thromboplastin time, and platelet aggregation in vitro were exacerbated after exposure to PEG-AgNPs in HT mice compared with either NT mice exposed to nanoparticles or HT mice exposed to saline. Elevated concentrations of fibrinogen, plasminogen activator inhibitor-1, and von Willebrand factor were seen after the exposure to PEG-AgNPs in HT mice compared with either PEG-AgNPs exposed NT mice or HT mice given with saline. Likewise, the plasma levels of superoxide dismutase and nitric oxide were augmented by PEG-AgNPs in HT mice compared with either NT mice exposed to nanoparticles or HT mice exposed to saline. Collectively, these results demonstrate that PEG-AgNPs can potentially exacerbate the in vivo and in vitro procoagulatory and oxidative stress effect in HT mice and suggest that population with hypertension are at higher risk of the toxicity of PEG-AgNPs.

Dosimetry and Radioenhancement Comparison of Gold Nanoparticles in Kilovoltage and Megavoltage Radiotherapy using MAGAT Polymer Gel Dosimeter

2019 ◽  
Vol 9 (2Apr) ◽  
Author(s):  
S Farahani ◽  
N Riyahi Alam ◽  
S Haghgoo ◽  
M Khoobi ◽  
Gh Geraily ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
3D Visualization ◽  
Energy Levels ◽  
Polymer Gel ◽  
External Radiotherapy ◽  
Dose Enhancement ◽  
Internal Radiotherapy ◽  
Boost Radiotherapy

Background: Numerous unique characteristics of the nanosized gold, including high atomic number, low toxicity, and high biocompatibility make it one of the most appropriate nanostructures to boost radiotherapy efficacy. Many in-vivo and in-vitro investigations have indicated that gold nanoparticles (AuNPs) can significantly increase tumor injuries in low kilovoltage radiotherapy. While deep-lying tumors require much higher energy levels with greater penetration power, and investigations carried out in megavoltage energy range show contradictory results.Objective: In this study, we quantitatively assess and compare dose enhancement factors (DEFs) obtained through AuNPs under radiation of Cobalt-60 source (1.25MeV) versus Iridium-192 source (0.380 KeV) using MAGAT gel dosimeter.Material and Methods: MAGAT polymer gel in both pure and combined with 0.2 mM AuNPs was synthesized. In order to quantify the effect of energy on DEF, irradiation was carried out by Co-60 external radiotherapy and Ir-192 internal radiotherapy. Finally, readings of irradiated and non-irradiated gels were performed by MR imaging.Result: The radiation-induced R2 (1/T2) changes of the gel tubes doped with AuNPs compared to control samples, upon irradiation of beams released by Ir-192 source showed a significant dose enhancement (15.31% ±0.30) relative to the Co-60 external radiotherapy (5.85% ±0.14).Conclusion: This preliminary study suggests the feasibility of using AuNPs in radiation therapy (RT), especially in low-energy sources of brachytherapy. In addition, MAGAT polymer gel, as a powerful dosimeter, could be used for 3D visualization of radiation dose distribution of AuNPs in radiotherapy.

Cancerous Cell Destruction Using Low Level Ultrasound in the Presence of Gold Nanoparticles: An in vitro Study on 4T1 Cells

2018 ◽  
Vol 14 (4) ◽  
pp. 329-334
Author(s):  
Ahmad Shanei ◽  
Neda Attaran ◽  
Marziyeh Mirzaeiyan ◽  
Mohammad Reza Salamat ◽  
Hossein Hejazi
Keyword(s):  
Gold Nanoparticles ◽  
In Vitro Study ◽  
Vitro Study ◽  
Low Level ◽  
Cell Destruction ◽  
Cancerous Cell ◽  
4T1 Cells

Interference of Gold Nanoparticles with In vitro Endotoxin Detection Assays

2020 ◽  
Vol 16 (2) ◽  
pp. 204-213 ◽  
Author(s):  
Melissa A. Vetten ◽  
Mary Gulumian
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Surface Reactivity ◽  
In Vitro Assays ◽  
Limulus Amebocyte Lysate ◽  
Chromogenic Assay ◽  
Nanoparticle Suspensions ◽  
Endotoxin Contamination ◽  
Factor C

Background: Endotoxin-free engineered nanoparticle suspensions are imperative for their successful applications in the field of nanomedicine as well as in the investigations in their toxicity. Gold nanoparticles are known to interfere with various in vitro assays due to their optical properties and potential for surface reactivity. In vitro endotoxin testing assays are known to be susceptible to interference caused by the sample being tested. Objective: This study aimed to identify a preferred assay for the testing of endotoxin contamination in gold nanoparticle suspensions. Methods: The interference by gold nanoparticles on three assays namely, the commonly used limulus amebocyte lysate chromogenic assay, the limulus amebocyte lysate gel-clot method, and the less common recombinant Factor C (rFC) assay, was tested. Results: Possible interference could be observed with all three assays. The interference with the absorbance- based chromogenic assay could not be overcome by dilution; whilst the qualitative nature of the gel-clot assay excluded the possibility of distinguishing between a false positive result due to enhancement of the sensitivity of the assay, and genuine endotoxin contamination. However, interference with the rFC assay was easily overcome through dilution. Conclusion: The rFC assay is recommended as an option for endotoxin contamination detection in gold nanoparticle suspensions.

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