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Full-Text Articles in Medicine and Health Sciences
Ph-Dependent Silica Nanoparticle Dissolution And 1 Cargo Release, Giorgia Giovaninni, Colin J. Moore, Andrew John Hall, Hugh Byrne, Vladimir Gubala
Ph-Dependent Silica Nanoparticle Dissolution And 1 Cargo Release, Giorgia Giovaninni, Colin J. Moore, Andrew John Hall, Hugh Byrne, Vladimir Gubala
Articles
The dissolution of microporous silica nanoparticles (NP) in aqueous environments of different biologically relevant pH was studied in order to assess their potential as drug delivery vehicles. Silica NPs, loaded with fluorescein, were prepared using different organosilane precursors (tetraethoxysilane, ethyl triethoxysilane or a 1:1 molar ratio of both) and NP dissolution was evaluated in aqueous conditions at pH 4, pH 6 and pH 7.4. These conditions correspond to the acidity of the intracellular environment (late endosome, early endosome, cytosol respectively) and gastrointestinal tract (‘fed’ stomach, duodenum and jejunum respectively). All NPs degraded at pH 6 and pH 7.4, while no …
In Vitro Evaluation Of The Cytotoxicity Of A Folate-Modified Β-Cyclodextrin As A New Anti-Cancer Drug Delivery System, Zlata Tofzikovskaya, Alan Casey, Orla L. Howe, Christine O'Connor, Mary Mcnamara
In Vitro Evaluation Of The Cytotoxicity Of A Folate-Modified Β-Cyclodextrin As A New Anti-Cancer Drug Delivery System, Zlata Tofzikovskaya, Alan Casey, Orla L. Howe, Christine O'Connor, Mary Mcnamara
Articles
Many chemotherapeutic drugs are therapeutically non-selective and do not distinguish between healthy cells and tumour cells which can result in severe side effects and toxicity. Drug delivery systems can be used to target specific cells and therefore may eliminate many of the side effects, increasing drug efficiency and efficacy, and controlling drug release. One possible strategy for targeted drug delivery is to use unique molecular markers such as folate receptors in cancer cells. In this work the cytotoxicity of a novel cyclodextrin-folate conjugate, 6-deoxy-6-[(1-(-2amino)ethylamino)folate-β-cyclodextrin (CDEnFA) was studied using the MTT assay and the MCF-7 (Breast), HeLa (Cervical), A549 (Lung cancer) …