Intracellular Delivery of Etoposide Loaded Biodegradable Nanoparticles: Cytotoxicity and Cellular Uptake Studies

2011 ◽  
Vol 11 (8) ◽  
pp. 6657-6667 ◽  
Author(s):  
Khushwant S. Yadav ◽  
Sheeba Jacob ◽  
Geetanjali Sachdeva ◽  
Krutika K. Sawant
Keyword(s):  
Cellular Uptake ◽  
Intracellular Delivery ◽  
Biodegradable Nanoparticles ◽  
Uptake Studies

Probing Cellular Outcomes Using Heterobivalent Constructs

2019 ◽  
Author(s):  
Rohit Bhadoria ◽  
Kefeng Ping ◽  
Christer Lohk ◽  
Ivar Järving ◽  
Pavel Starkov
Keyword(s):  
Cell Viability ◽  
Small Molecules ◽  
Cellular Uptake ◽  
Kinase Inhibitors ◽  
Rho Kinase ◽  
Intracellular Delivery ◽  
Rho Kinase Inhibitors

<div> <div> <div> <p>Conjugation techniques are central to improving intracellular delivery of bioactive small molecules. However, tracking and assessing the overall biological outcome of these constructs remains poorly understood. We addressed this issue by having developed a focused library of heterobivalent constructs based on Rho kinase inhibitors to probe various scenarios. By comparing induction of a phenotype of interest vs. cell viability vs. cellular uptake, we demonstrate that such conjugates indeed lead to divergent cellular outcomes. </p> </div> </div> </div>

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 EFFECTS OF POLYMERIC NANOPARTICLE SURFACE PROPERTIES ON INTERACTION WITH BRAIN TUMOR ENVIRONMENT

Nano LIFE ◽  
2013 ◽  
Vol 03 (04) ◽  
pp. 1343003 ◽  
Author(s):  
BRANDON MATTIX ◽  
THOMAS MOORE ◽  
OLGA UVAROV ◽  
SAMUEL POLLARD ◽  
LAUREN O'DONNELL ◽  
...  
Keyword(s):  
Human Brain ◽  
Surface Charge ◽  
Cellular Uptake ◽  
Drug Clearance ◽  
Cellular Interaction ◽  
Normal Tissues ◽  
Poly Ethylene ◽  
Uptake Studies ◽  
Effect Of Surface

Current chemotherapy treatments are limited by poor drug solubility, rapid drug clearance and systemic side effects. Additionally, drug penetration into solid tumors is limited by physical diffusion barriers [e.g., extracellular matrix (ECM)]. Nanoparticle (NP) blood circulation half-life, biodistribution and ability to cross extracellular and cellular barriers will be dictated by NP composition, size, shape and surface functionality. Here, we investigated the effect of surface charge of poly(lactide)-poly(ethylene glycol) NPs on mediating cellular interaction. Polymeric NPs of equal sizes were used that had two different surface functionalities: negatively charged carboxyl ( COOH ) and neutral charged methoxy ( OCH 3). Cellular uptake studies showed significantly higher uptake in human brain cancer cells compared to noncancerous human brain cells, and negatively charged COOH NPs were uptaken more than neutral OCH 3 NPs in 2D culture. NPs were also able to load and control the release of paclitaxel (PTX) over 19 days. Toxicity studies in U-87 glioblastoma cells showed that PTX-loaded NPs were effective drug delivery vehicles. Effect of surface charge on NP interaction with the ECM was investigated using collagen in a 3D cellular uptake model, as collagen content varies with the type of cancer and the stage of the disease compared to normal tissues. Results demonstrated that NPs can effectively diffuse across an ECM barrier and into cells, but NP mobility is dictated by surface charge. In vivo biodistribution of OCH 3 NPs in intracranial tumor xenografts showed that NPs more easily accumulated in tumors with less collagen. These results indicate that a robust understanding of NP interaction with various tumor environments can lead to more effective patient-tailored therapies.

scholarly journals Epigallocatechin Gallate-Gold Nanoparticles Exhibit Superior Antitumor Activity Compared to Conventional Gold Nanoparticles: Potential Synergistic Interactions

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 396 ◽  
Author(s):  
Suhash Chavva ◽  
Sachin Deshmukh ◽  
Rajashekhar Kanchanapally ◽  
Nikhil Tyagi ◽  
Jason Coym ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Antitumor Activity ◽  
Cancer Cells ◽  
Cellular Uptake ◽  
Nuclear Translocation ◽  
Epigallocatechin Gallate ◽  
Drug Carriers ◽  
Water Soluble ◽  
Tetrazolium Salt ◽  
Uptake Studies

Epigallocatechin gallate (EGCG) possesses significant antitumor activity and binds to laminin receptors, overexpressed on cancer cells, with high affinity. Gold nanoparticles (GNPs) serve as excellent drug carriers and protect the conjugated drug from enzymatic metabolization. Citrate-gold nanoparticles (C-GNPs) and EGCG-gold nanoparticles (E-GNPs) were synthesized by reduction methods and characterized with UV-visible spectroscopy, transmission electron microscopy (TEM), and dynamic light scattering (DLS). Cytotoxicity of citrate, EGCG, C-GNPs, and E-GNPs was evaluated by the water-soluble tetrazolium salt (WST-1) assay. Nanoparticle cellular uptake studies were performed by TEM and atomic absorption spectroscopy (AAS). Dialysis method was employed to assess drug release. Cell viability studies showed greater growth inhibition by E-GNPs compared to EGCG or C-GNPs. Cellular uptake studies revealed that, unlike C-GNPs, E-GNPs were taken up more efficiently by cancerous cells than noncancerous cells. We found that E-GNP nanoformulation releases EGCG in a sustained fashion. Furthermore, data showed that E-GNPs induced more apoptosis in cancer cells compared to EGCG and C-GNPs. From the mechanistic standpoint, we observed that E-GNPs inhibited the nuclear translocation and transcriptional activity of nuclear factor-kappaB (NF-κB) with greater potency than EGCG, whereas C-GNPs were only minimally effective. Altogether, our data suggest that E-GNPs can serve as potent tumor-selective chemotoxic agents.

Efficient cellular uptake of click nucleic acid modified proteins

2020 ◽  
Vol 56 (35) ◽  
pp. 4820-4823 ◽  
Author(s):  
Albert Harguindey ◽  
Heidi R. Culver ◽  
Jasmine Sinha ◽  
Christopher N. Bowman ◽  
Jennifer N. Cha
Keyword(s):  
Nucleic Acid ◽  
Cellular Uptake ◽  
Intracellular Delivery ◽  
Modified Proteins

Efficient intracellular delivery of biomacromolecules such as proteins continues to remain a challenge despite its potential for medicine.

Synthesis, Cellular Uptake, and Cytotoxicity of a Thermally Responsive Nanocapsule

2009 ◽  
Author(s):  
Wujie Zhang ◽  
Jianhua Rong ◽  
Qian Wang ◽  
Xiaoming He
Keyword(s):  
Cellular Uptake ◽  
Blood Cells ◽  
Mammalian Cells ◽  
Polymeric Nanoparticles ◽  
Intracellular Delivery ◽  
Sustained Delivery ◽  
Hydrogel Nanoparticles ◽  
Ambient Temperatures ◽  
Thermally Responsive ◽  
Therapeutic Drugs

Recently, polymeric nanoparticles have attracted tremendous interests as a useful tool to encapsulate therapeutic drugs, genes, and proteins for their controlled and sustained delivery. Among them, polymeric hydrogel nanoparticles with thermal and/or pH responsiveness have attracted particular attention [1]. Trehalose, a non-reducing disaccharide of glucose, has been demonstrated to be a potent, nontoxic bioprotectant for stabilizing lipids, proteins, viruses, and blood cells at cryogenic and particularly, ambient temperatures (i.e., cryo and lyopreservation) [2]. However, intracellular delivery of trehalose into small eukaryotic mammalian cells in a large quantity for biostabilization purpose has not been very successful so far [2]. In this study, a thermally responsive polymeric nanocapsule was synthesized and characterized with the aim to encapsulate trehalose for its intracellular delivery.

A Novel Flow-Cytometry-Based Assay for Cellular Uptake Studies of Polyelectrolyte Microcapsules

Small ◽  
2008 ◽  
Vol 4 (10) ◽  
pp. 1763-1768 ◽  
Author(s):  
Maximilian Semmling ◽  
Oliver Kreft ◽  
Almudena Muñoz Javier ◽  
Gleb B. Sukhorukov ◽  
Josef Käs ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Cellular Uptake ◽  
Polyelectrolyte Microcapsules ◽  
Uptake Studies
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