WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7150
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Article Citation - WoS: 1Citation - Scopus: 1Shape and Surface Modification Dependent Cellular Interactions of Gold Nanoparticles in a 3D Blood-Brain Supported Neurospheroid Model(Churchill Livingstone, 2025) Tomak, Aysel; Öksel Karakuş, Ceyda; Coban, Reyhan; Oksel-Karakus, Ceyda; Yesil-Celiktas, Ozlem; 01. Izmir Institute of Technology; 03. Faculty of Engineering; 03.01. Department of BioengineeringRecent investigations have begun to explore the cellular interactions of nanoparticles (NPs) in three-dimensional (3D) neuro-spheroid models of the blood-brain barrier (BBB), offering novel insights into NP transport across the barrier and their potential neurotoxic effects. Building on these findings, we investigated the effects of particle shape and surface modification on the transport dynamics and cellular interactions of gold NPs (AuNPs) using a multicellular 3D spheroid model of the BBB. AuNPs with two different morphologies, spherical and rod-like, were synthesized, modified with polyethylene glycol (PEG) and characterized in detail using Ultraviolet-Visible (UV-Vis) Spectroscopy, Scanning Electron Microscopy (SEM), Dynamic Light Scattering (DLS) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) techniques. A 3D neuro-spheroid model consisting of mouse brain endothelial cells (bEnd.3), motor neuron-like hybrid cells (NSC-34) and glial cells (C6) was employed to evaluate the BBB transport characteristics and cytotoxicity of bare and PEG-coated spherical and rod-shaped AuNPs. Our results indicated that 3D neurospheroid models can serve as orchestral platforms for studying cellular behaviour of NPs. PEGylation of NPs substantially reduced cytotoxic effects compared to bare particles. While spherical AuNPs showed limited translocation through the endothelial barrier, those that entered the spheroid were found to be distributed deeper within the interior. In contrast, rod-shaped particles exhibited a greater capacity to cross the BBB but tended to accumulate near the periphery without deeper penetration. These findings underscore the critical role of shape and surface chemistry in nanoparticle-mediated BBB transport and support the utility of 3D neuro-spheroid models in predicting nanoparticle behavior in brain tissue.Article Citation - WoS: 10Citation - Scopus: 13Overcoming Roadblocks in Computational Roadmaps To the Future for Safe Nanotechnology(IOP Publishing, 2021) Öksel Karakuş, Ceyda; Öksel Karakuş, Ceyda; 03.01. Department of Bioengineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyThe rapid rise of nanotechnology has resulted in a parallel rise in the number of products containing nanomaterials. The unusual properties that nano forms of materials exhibit relative to the bulk has driven intense research interest and relatively rapid adoption by industry. Regulatory agencies are charged with protecting workers, the public, and the environment from any adverse effects of nanomaterials that may also arise because of these novel physical and chemical properties. They need data and models that allow them to flag nanomaterials that may be of concern, while balancing potential stifling of commercial innovation. Roadmaps for the future of safe nanotechnology were defined more than a decade ago, but many roadblocks identified in these studies remain. Here, we discuss the roadblocks that are still hindering the effective application of informatics and predictive computational nanotoxicology methods from providing more effective guidance to nanomaterials regulatory agencies and safe-by-design rationale for industry. We describe how developments in high throughput synthesis, characterization, and biological assessment of nanomaterials will overcome many of these roadblocks, allowing a clearly defined roadmap for computational design of effective but safe-by-design nanomaterials to be realized.