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result sql = Mesoporous silica nanoparticles (MSN) were functionalised by aminofluorescein (AMF) with diethylenetriaminepentaacetic acid spacer molecules which provide free carboxylic groups for binding cell-specific ligands such as folate. AMF allowed the exploration of cellular uptake by HeLa cells using confocal microscopy and flow cytometry. The functionalized nanoparticles (MSN-AMF) penetrated efficiently into HeLa cell cytoplasm through a clathrin dependent endocytosis mechanism. The number of endocytosed MSN-AMF was enhanced when using folate as a targeting molecule. Uptake kinetics revealed that most of MSN-AMF were internalized within 4 h of incubation. Moreover, we found that MSN-AMF were capable of escaping the acidic endolysosomal vesicles of HeLa cells. Cytotoxicity studies suggested that these nanoparticles are non-toxic to HeLa cells up to a dose level of 50 microg/ml.
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result sql = Uptake of functionalized mesoporous silica nanoparticles by human cancer cells.
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result sql = Mesoporous silica nanoparticles (MSN) were functionalised by aminofluorescein (AMF) with diethylenetriaminepentaacetic acid spacer molecules which provide free carboxylic groups for binding cell-specific ligands such as folate. AMF allowed the exploration of cellular uptake by HeLa cells using confocal microscopy and flow cytometry. The functionalized nanoparticles (MSN-AMF) penetrated efficiently into HeLa cell cytoplasm through a clathrin dependent endocytosis mechanism. The number of endocytosed MSN-AMF was enhanced when using folate as a targeting molecule. Uptake kinetics revealed that most of MSN-AMF were internalized within 4 h of incubation. Moreover, we found that MSN-AMF were capable of escaping the acidic endolysosomal vesicles of HeLa cells. Cytotoxicity studies suggested that these nanoparticles are non-toxic to HeLa cells up to a dose level of 50 microg/ml.
Publication: J Nanosci Nanotechnol 2010 Apr ;10(4)::2314-24.
Publication Date: 2010 Apr
Study Author(s): Fisichella, Matthieu;Dabboue, Hinda;Bhattacharyya, Sanjib;Lelong, Gérald;Saboungi, Marie-Louise;Warmont, Fabienne;Midoux, Patrick;Pichon, Chantal;Guérin, Martine;Hevor, Tobias;Salvetat, Jean-Paul;
Institution: Centre de Recherche sur la Matière Divisée-UMR6619 Université d'Orléans-CNRS, 1B rue de la Férollerie, 45071 Orleáns Cedex 2, France.
Shortcut link to this study:
Publication Date: 2010 Apr
Study Author(s): Fisichella, Matthieu;Dabboue, Hinda;Bhattacharyya, Sanjib;Lelong, Gérald;Saboungi, Marie-Louise;Warmont, Fabienne;Midoux, Patrick;Pichon, Chantal;Guérin, Martine;Hevor, Tobias;Salvetat, Jean-Paul;
Institution: Centre de Recherche sur la Matière Divisée-UMR6619 Université d'Orléans-CNRS, 1B rue de la Férollerie, 45071 Orleáns Cedex 2, France.
Shortcut link to this study:
Mesoporous silica nanoparticles (MSN) were functionalised by aminofluorescein (AMF) with diethylenetriaminepentaacetic acid spacer molecules which provide free carboxylic groups for binding cell-specific ligands such as folate. AMF allowed the exploration of cellular uptake by HeLa cells using confocal microscopy and flow cytometry. The functionalized nanoparticles (MSN-AMF) penetrated efficiently into HeLa cell cytoplasm through a clathrin dependent endocytosis mechanism. The number of endocytosed MSN-AMF was enhanced when using folate as a targeting molecule. Uptake kinetics revealed that most of MSN-AMF were internalized within 4 h of incubation. Moreover, we found that MSN-AMF were capable of escaping the acidic endolysosomal vesicles of HeLa cells. Cytotoxicity studies suggested that these nanoparticles are non-toxic to HeLa cells up to a dose level of 50 microg/ml.
PMID: 20355428
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