| Improvement of gentamicin poly(D,L-lactic-co-glycolic acid) microspheres for treatment of osteomyelitis induced by orthopedic procedures. | |
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MedLine Citation:
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PMID: 17064761 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Poly(D,L-lactide-co-glycolide) (PLGA) biodegradable microspheres with gentamicin for local treatment of microbial bone infection were prepared and characterized. Gentamicin was assayed spectrophotometrically at 332 nm after derivation with the o-phthalaldehyde; biodegradable polymers studied did not interfere with this method of gentamicin analysis. PLGA microspheres were made by the double emulsion solvent evaporation method with modifications. The first W(1)/O emulsion was obtained by ultrasonication or high-speed homogenization, and a large aqueous phase W(2) (200 ml) was used. The ultrasonication method increases the microsphere percentage observed in the 20-40 microm size range and, in all cases SEM-microphotographs revealed homogeneous and spherically shaped particles with smooth surfaces. The method including ultrasonication proposed in the present work improved the encapsulation efficiency of gentamicin by nearly 100% (97.94%). Several mathematical models based on heterogeneous hydrolytic degradation were applied to evaluate their suitability in describing gentamicin released from PLGA microspheres. Two models, one of them including an autocatalytic process, were finally proposed to contribute to understand the mass transport mechanism involved in drug release from these microspheres. |
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Authors:
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Maria Rosa Virto; Begoña Elorza; Susana Torrado; Maria de Los Angeles Elorza; Gloria Frutos |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2006-10-24 |
Journal Detail:
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Title: Biomaterials Volume: 28 ISSN: 0142-9612 ISO Abbreviation: Biomaterials Publication Date: 2007 Feb |
Date Detail:
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Created Date: 2006-11-07 Completed Date: 2007-02-05 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8100316 Medline TA: Biomaterials Country: England |
Other Details:
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Languages: eng Pagination: 877-85 Citation Subset: IM |
Affiliation:
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Department of Pharmacy and Pharmaceutical Technology, School of Pharmacy, Complutense University, Madrid 28040, Spain. rosa30@farm.ucm.es <rosa30@farm.ucm.es> |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Antineoplastic Agents
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administration & dosage* Biocompatible Materials Catalysis Drug Delivery Systems Gentamicins / administration & dosage* Humans Lactic Acid / chemistry* Microscopy, Electron, Scanning Microspheres* Models, Theoretical Orthopedic Procedures* Osteomyelitis / drug therapy* Polyglycolic Acid / chemistry* Polymers / chemistry* Sonication X-Ray Diffraction |
| Chemical | |
Reg. No./Substance:
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0/Antineoplastic Agents; 0/Biocompatible Materials; 0/Gentamicins; 0/Polymers; 0/polylactic acid-polyglycolic acid copolymer; 26009-03-0/Polyglycolic Acid; 50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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