| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Mann, Stephen
University of Bristol
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (25/25 displayed)
- 2020Mixed liposomes containing gram-positive bacteria lipidscitations
- 2017Self-Assembly of Colloidal Nanocomposite Hydrogels Using 1D Cellulose Nanocrystals and 2D Exfoliated Organoclay Layerscitations
- 2015Multimodal Plasmonics in Fused Colloidal Networkscitations
- 2014In situ X-ray reflectivity studies of molecular and molecular-cluster intercalation within purple membrane filmscitations
- 2014In situ X-ray reflectivity studies of molecular and molecular-cluster intercalation within purple membrane filmscitations
- 2014Molecular dynamics simulations reveal a dielectric-responsive coronal structure in protein-polymer surfactant hybrid nanoconstructscitations
- 2013Electrochemical crystallization of spatially organized copper microwire arrays within biomineralized (dentine) templatescitations
- 2013Apoferritin-encapsulated PbS quantum dots significantly inhibit growth of colorectal carcinoma cellscitations
- 2013Apoferritin-encapsulated PbS quantum dots significantly inhibit growth of colorectal carcinoma cellscitations
- 2013Directing Chondrogenesis of Stem Cells with Specific Blends of Cellulose and Silkcitations
- 2013The reinforcement effects of graphene oxide nanoplatelets on the mechanical and viscoelastic properties of natural rubber
- 2012High magnetic field quantum transport in Au nanoparticle-cellulose filmscitations
- 2012Polymer/nucleotide droplets as bio-inspired functional micro-compartmentscitations
- 2012The differential effect of apoferritin-PbS nanocomposites on cell cycle progression in normal and cancerous cellscitations
- 2011Lamellar nanocomposite films of purple membrane and poly(acrylate)
- 2011Guest-Molecule-Directed Assembly of Mesostructured Nanocomposite Polymer/Organoclay Hydrogelscitations
- 2011Supramolecular hydrogels derived from silver ion-mediated self-assembly of 5 '-guanosine monophosphatecitations
- 2010Assembly of poly(methacrylate)/purple membrane lamellar nanocomposite films by intercalation and in situ polymerisationcitations
- 2009Structure and Properties of Silicified Purple Membrane Thin Filmscitations
- 2009Hydroxyapatite pattern formation in PVA gelscitations
- 2009Membrane stabilization and transformation in organoclay-vesicle hybrid constructscitations
- 2009Immobilisation and encapsulation of functional protein-inorganic constructscitations
- 2007Bio-functional mesolamellar nanocomposites based on inorganic/polymer intercalation in purple membrane (bacteriorhodopsin) filmscitations
- 2007Biomimetic hydroxyapatite-drug nanocrystals as potential bone substitutes with antitumor drug delivery propertiescitations
- 2007Influence of polymer co-intercalation on guest release from aminopropyl-functionalized magnesium phyllosilicate mesolamellar nanocompositescitations
Places of action
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article
Biomimetic hydroxyapatite-drug nanocrystals as potential bone substitutes with antitumor drug delivery properties
Abstract
This Full Paper investigates the adsorption and desorption of the anticancer drugs cis-diamminedichloroplatinum(II) (CDDP, cisplatin) and the new platinum(II) complex di(ethylenediamineplatinum)medronate (DPM), as well as the clinically relevant bisphosphonate alendronate, towards two biomimetic synthetic HA nanocrystalline materials with either plate-shaped (HAps) or needle-shaped (HAns) morphologies and different chemico-physical properties. The adsorption and desorption kinetics are dependent on the specific properties of the drugs and the morphology of the HA nanoparticles. Adsorption of the platinum complexes occurs with retention of the nitrogen ligands but the chloride ligands of cisplatin are displaced. Despite their opposite charges, the negatively charged alendronate bisphosphonate and the positively charged aquated cisplatin are strongly adsorbed, while the neutral DPM complex shows lower affinity towards the negatively charged apatitic surface. The data suggest that adsorption of the two platinum complexes is driven by electrostatic attractions, while interaction between the alendronate and the HA surface takes place by ligand exchange in which the two phosphonate groups of the drug molecule replace two surface phosphate groups. Significantly, adsorption of positively charged hydrolysis species of cisplatin is more favored on the phosphate-rich HAns surface while adsorption of negatively charged alendronate is more favored on the calcium-rich HAps surface. The latter type of short-range electrostatic interactions also appear to dominate the desorption kinetics; consequently, drug release is greater for neutral DPM than for charged alendronate and aquated cisplatin. Moreover, while the release per unit area of charged species is the same for the two types of HAs, the release of DPM is faster from HAns, which is lower in surface calcium, than for HAps. Overall, this work demonstrates that the properties of HA nanocrystals can be modulated in such a way to produce HA/biomolecule conjugates tailored for ...