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Release evaluation of drugs from ordered three-dimensional silica structures
Isabel Izquierdo-Barba1, Africa Martinez, Antonio L Doadrio
1Departamento de Química Inorgánica y Bioinorgánica, Facultad de Farmacia, Universidad Complutense, Pza, Ramón y Cajal s/n, ES 28040 Madrid, Spain.
Summary
Drug delivery systems using cubic mesoporous materials (MCM-48, LP-Ia3d) show slower release rates with larger pore sizes. Modifying pore surfaces further reduced drug release, impacting delivery efficiency.
Area of Science:
- Materials Science
- Nanotechnology
- Pharmaceutical Sciences
Background:
- Mesoporous silica materials with Ia3d symmetry, like MCM-48 and large pore Ia3d (LP-Ia3d), offer tunable pore sizes for advanced applications.
- These materials are investigated for their potential as matrices in controlled drug delivery systems.
Purpose of the Study:
- To evaluate the efficacy of cubic mesoporous structures (MCM-48, LP-Ia3d) as drug delivery systems.
- To investigate the impact of pore size and surface chemistry on drug release kinetics.
Main Methods:
- Synthesis and characterization of cubic mesoporous materials (MCM-48, LP-Ia3d) with distinct pore sizes (3.6 nm and 5.7 nm).
- Drug delivery studies using ibuprofen and erythromycin as model drugs.
- Modification of pore surfaces with hydrocarbon chains (C8, C18) to alter hydrophobicity.
Main Results:
- Drug release rate decreased as the pore size of the mesoporous matrix increased.
- Modification of hydrophilic pore surfaces with hydrophobic chains (C8, C18) significantly reduced the release rate of hydrophobic drugs (erythromycin).
Conclusions:
- Pore size is a critical factor influencing drug release from Ia3d mesoporous materials.
- Surface functionalization offers a strategy to control drug release profiles, particularly for hydrophobic drugs.