Ultrafine NiO Particles Induce Cytotoxicity in Vitro by Cellular Uptake and Subsequent Ni(II) Release

2009 ◽  
Vol 22 (8) ◽  
pp. 1415-1426 ◽  
Author(s):  
Masanori Horie ◽  
Keiko Nishio ◽  
Katsuhide Fujita ◽  
Haruhisa Kato ◽  
Ayako Nakamura ◽  
...  
Keyword(s):  
Cellular Uptake

Using FRET to Measure the Time it Takes for a Cell to Destroy a Virus

2019 ◽  
Author(s):  
Candace E. Benjamin ◽  
Zhuo Chen ◽  
Olivia Brohlin ◽  
Hamilton Lee ◽  
Stefanie Boyd ◽  
...  
Keyword(s):  
Cellular Uptake ◽  
Rhodamine B ◽  
Virus Like Particle ◽  
A Cell ◽  
Viral Nanoparticles ◽  
The Stability ◽  
Open Question ◽  
Viral Surface ◽  
Fret Pair

<div><div><div><p>The emergence of viral nanotechnology over the preceding two decades has created a number of intellectually captivating possible translational applications; however, the in vitro fate of the viral nanoparticles in cells remains an open question. Herein, we investigate the stability and lifetime of virus-like particle (VLP) Qβ - a representative and popular VLP for several applications - following cellular uptake. By exploiting the available functional handles on the viral surface, we have orthogonally installed the known FRET pair, FITC and Rhodamine B, to gain insight of the particle’s behavior in vitro. Based on these data, we believe VLPs undergo aggregation in addition to the anticipated proteolysis within a few hours of cellular uptake.</p></div></div></div>

Recent Advances in Curcumin Nanocarriers for the Treatment of Different Types of Cancer with Special Emphasis on In Vitro Cytotoxicity and Cellular Uptake Studies

2020 ◽  
Vol 10 (5) ◽  
pp. 577-590
Author(s):  
Jai B. Sharma ◽  
Shailendra Bhatt ◽  
Asmita Sharma ◽  
Manish Kumar
Keyword(s):  
Cancer Cells ◽  
Cellular Uptake ◽  
Anticancer Agents ◽  
Targeted Delivery ◽  
In Vitro Cytotoxicity ◽  
Curcumin Nanoparticles ◽  
Cytotoxicity Studies ◽  
Delivery Technique ◽  
Different Types

Background: The potential use of nanocarriers is being explored rapidly for the targeted delivery of anticancer agents. Curcumin is a natural polyphenolic compound obtained from rhizomes of turmeric, belongs to family Zingiberaceae. It possesses chemopreventive and chemotherapeutic activity with low toxicity in almost all types of cancer. The low solubility and bioavailability of curcumin make it unable to use for the clinical purpose. The necessity of an effective strategy to overcome the limitations of curcumin is responsible for the development of its nanocarriers. Objective: This study is aimed to review the role of curcumin nanocarriers for the treatment of cancer with special emphasis on cellular uptake and in vitro cytotoxicity studies. In addition to this, the effect of various ligand conjugated curcumin nanoparticles on different types of cancer was also studied. Methods: A systematic review was conducted by extensively surfing the PubMed, science direct and other portals to get the latest update on recent development in nanocarriers of curcumin. Results: The current data from recent studies showed that nanocarriers of curcumin resulted in the targeted delivery, higher efficacy, enhanced bioavailability and lower toxicity. The curcumin nanoparticles showed significant inhibitory effects on cancer cells as compared to free curcumin. Conclusion: It can be concluded that bioavailability of curcumin and its cytotoxic effect to cancer cells can be enhanced by the development of curcumin based nanocarriers and it was found to be a potential drug delivery technique for the treatment of cancer.

scholarly journals In Vitro Cellular Uptake Studies of Self-Assembled Fluorinated Nanoparticles Labelled with Antibodies

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1906
Author(s):  
Mona Atabakhshi-Kashi ◽  
Mónica Carril ◽  
Hossein Mahdavi ◽  
Wolfgang J. Parak ◽  
Carolina Carrillo-Carrion ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Cellular Uptake ◽  
Hydrophobic Interactions ◽  
Intrinsic Properties ◽  
Wide Range ◽  
Self Assembled ◽  
Uptake Studies ◽  
Targeting Ability ◽  
Fluorinated Nanoparticles

Nanoparticles (NPs) functionalized with antibodies (Abs) on their surface are used in a wide range of bioapplications. Whereas the attachment of antibodies to single NPs to trigger the internalization in cells via receptor-mediated endocytosis has been widely studied, the conjugation of antibodies to larger NP assemblies has been much less explored. Taking into account that NP assemblies may be advantageous for some specific applications, the possibility of incorporating targeting ligands is quite important. Herein, we performed the effective conjugation of antibodies onto a fluorescent NP assembly, which consisted of fluorinated Quantum Dots (QD) self-assembled through fluorine–fluorine hydrophobic interactions. Cellular uptake studies by confocal microscopy and flow cytometry revealed that the NP assembly underwent the same uptake procedure as individual NPs; that is, the antibodies retained their targeting ability once attached to the nanoassembly, and the NP assembly preserved its intrinsic properties (i.e., fluorescence in the case of QD nanoassembly).

scholarly journals In-Vitro Application of Magnetic Hybrid Niosomes: Targeted siRNA-Delivery for Enhanced Breast Cancer Therapy

Pharmaceutics ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 394 ◽  
Author(s):  
Viktor Maurer ◽  
Selin Altin ◽  
Didem Ag Seleci ◽  
Ajmal Zarinwall ◽  
Bilal Temel ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cellular Uptake ◽  
Sirna Delivery ◽  
Superparamagnetic Iron Oxide ◽  
Cost Effective ◽  
Chemotherapeutic Agents ◽  
Therapy Outcome ◽  
Ionic Surfactant ◽  
Combinational Therapy

Even though the administration of chemotherapeutic agents such as erlotinib is clinically established for the treatment of breast cancer, its efficiency and the therapy outcome can be greatly improved using RNA interference (RNAi) mechanisms for a combinational therapy. However, the cellular uptake of bare small interfering RNA (siRNA) is insufficient and its fast degradation in the bloodstream leads to a lacking delivery and no suitable accumulation of siRNA inside the target tissues. To address these problems, non-ionic surfactant vesicles (niosomes) were used as a nanocarrier platform to encapsulate Lifeguard (LFG)-specific siRNA inside the hydrophilic core. A preceding entrapment of superparamagnetic iron-oxide nanoparticles (FexOy-NPs) inside the niosomal bilayer structure was achieved in order to enhance the cellular uptake via an external magnetic manipulation. After verifying a highly effective entrapment of the siRNA, the resulting hybrid niosomes were administered to BT-474 cells in a combinational therapy with either erlotinib or trastuzumab and monitored regarding the induced apoptosis. The obtained results demonstrated that the nanocarrier successfully caused a downregulation of the LFG gene in BT-474 cells, which led to an increased efficacy of the chemotherapeutics compared to plainly added siRNA. Especially the application of an external magnetic field enhanced the internalization of siRNA, therefore increasing the activation of apoptotic signaling pathways. Considering the improved therapy outcome as well as the high encapsulation efficiency, the formulated hybrid niosomes meet the requirements for a cost-effective commercialization and can be considered as a promising candidate for future siRNA delivery agents.

Carbon Dot Assemblies for Enhanced Cellular Uptake and Photothermal Therapy In Vitro

2017 ◽  
Vol 2 (33) ◽  
pp. 10860-10864 ◽  
Author(s):  
Changshun Hou ◽  
Mengqi Wang ◽  
Liang Guo ◽  
Qingyan Jia ◽  
Jiechao Ge
Keyword(s):  
Cellular Uptake ◽  
Photothermal Therapy ◽  
Carbon Dot

scholarly journals Influence of Hyperthermia on Efficacy and Uptake of Carbon Nanohorn-Cisplatin Conjugates

2014 ◽  
Vol 136 (2) ◽  
Author(s):  
Matthew R. DeWitt ◽  
Allison M. Pekkanen ◽  
John Robertson ◽  
Christopher G. Rylander ◽  
Marissa Nichole Rylander
Keyword(s):  
Cellular Uptake ◽  
Near Infrared ◽  
Drug Efficacy ◽  
Infrared Light ◽  
Exterior Surface ◽  
Mild Hyperthermia ◽  
Carbon Nanohorns ◽  
Thermal Enhancement ◽  
The Difference

Single-walled carbon nanohorns (SWNHs) have significant potential for use in photothermal therapies due to their capability to absorb near infrared light and deposit heat. Additionally, their extensive relative surface area and volume makes them ideal drug delivery vehicles. Novel multimodal treatments are envisioned in which laser excitation can be utilized in combination with chemotherapeutic-SWNH conjugates to thermally enhance the therapeutic efficacy of the transported drug. Although mild hyperthermia (41–43 °C) has been shown to increase cellular uptake of drugs such as cisplatin (CDDP) leading to thermal enhancement, studies on the effects of hyperthermia on cisplatin loaded nanoparticles are currently limited. After using a carbodiimide chemical reaction to attach CDDP to the exterior surface of SWNHs and nitric acid to incorporate CDDP in the interior volume, we determined the effects of mild hyperthermia on the efficacy of the CDDP-SWNH conjugates. Rat bladder transitional carcinoma cells were exposed to free CDDP or one of two CDDP-SWNH conjugates in vitro at 37 °C and 42 °C with the half maximal inhibitory concentration (IC50) for each treatment. The in vitro results demonstrate that unlike free CDDP, CDDP-SWNH conjugates do not exhibit thermal enhancement at 42 °C. An increase in viability of 16% and 7% was measured when cells were exposed at 42 deg compared to 37 deg for the surface attached and volume loaded CDDP-SWNH conjugates, respectively. Flow cytometry and confocal microscopy showed a decreased uptake of CDDP-SWNH conjugates at 42 °C compared to 37 °C, revealing the importance of nanoparticle uptake on the CDDP-SWNH conjugate's efficacy, particularly when hyperthermia is used as an adjuvant, and demonstrates the effect of particle size on uptake during mild hyperthermia. The uptake and drug release studies elucidated the difference in viability seen in the drug efficacy studies at different temperatures. We speculate that the disparity in thermal enhancement efficacy observed for free drug compared to the drug SWNH conjugates is due to their intrinsic size differences and, therefore, their mode of cellular uptake: diffusion or endocytosis. These experiments indicate the importance of tuning properties of nanoparticle-drug conjugates to maximize cellular uptake to ensure thermal enhancement in nanoparticle mediated photothermal-chemotherapy treatments.

Cellular Uptake, Subcellular Distribution and In Vitro Toxicity of Carboranyl Uridines

1993 ◽  
pp. 613-617
Author(s):  
Liang Liu ◽  
Rolf F. Barth ◽  
Werner Tjarks ◽  
Albert H. Soloway ◽  
David H. Ives
Keyword(s):  
Cellular Uptake ◽  
Subcellular Distribution ◽  
In Vitro Toxicity

scholarly journals In Vitro Characterization of Magnetic Resonance Imaging Contrast Agents for Molecular Imaging.

Blood ◽  
2006 ◽  
Vol 108 (11) ◽  
pp. 3944-3944
Author(s):  
Zhi Yu ◽  
Michael Grafe ◽  
Heike Meyborg ◽  
Eckart Fleck ◽  
Yangqiu Li
Keyword(s):  
Endothelial Cells ◽  
Molecular Imaging ◽  
Cellular Uptake ◽  
Umbilical Vein ◽  
Biological Properties ◽  
Blue Staining ◽  
Iron Core ◽  
Coated Particles ◽  
Coated Particle

Abstract The aim of this work was to evaluate the biological properties of one citrate-coated and two different dextran-coated paramagnetic particles with comparable size (iron core 4–10 nm). Endothelial cells from humans and mice as well as human macrophages were incubated for different time intervals with different particle suspensions. The cellular uptake was semi-quantitatively measured using the Prussian blue staining and, in addition, by cellular iron content. Furthermore the effect of known inhibitors of endocytosis was evaluated. In addition, it was evaluated whether linking of monoclonal antibodies to dextran-coated particles can make them bind specifically to certain cell surface structures. The results showed that the bEnd.3 cell line, human umbilical vein endothelial cells (HUVECs) and THP-1/macrophage cell lines internalize paramagnetic particles. The ranking of cellular uptake was: VSOP &gt; CMD-coated particles &gt;&gt; CLIO. The carboxydextran-coated SPIO uptake by endothelial cells is reduced by colchicine (50%). Conversely, cytochalasin B down-regulates the endocytosis of citrate-coated particle. Our data imply that the major mechanism of uptake would be pinocytosis for the VSOP and phagocytosis for the carboxydextran-coated particle CMD. The different surface coating can influence not only the quantity of the internalization, but also the pathway of internalization. CLIO linked to CD40 antibodies or to CD62E antibodies bound significantly better than IgG-linked CLIO. This was true especially for the anti-CD40-CLIO constructs where fluorescence increased two fold. Comparable results were observed with anti-CD62E-CLIO constructs; however, increase in fluorescence was higher than with CD40 binding; it increased on 3.9-fold (median) and 4.5-fold (mean). In conclusions, the binding of antibody-conjugated CLIO to the antigen-expressing cells was specific, with an affinity similar to that of the free antibody. Thus, it seems feasible to use antibody linked SPIOs for molecular imaging.

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