A Potential Approach for Decreasing the Burst Effect of Protein from PLGA Microspheres
| Autor: | Jan Frazier, Ana Jaklenec, Robert Langer, Karen Fu, Paul A. Burke, Noah Lotan, Kim Zinski, Alexander M. Klibanov, Roy A. Harrell, Christina Um |
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| Rok vydání: | 2003 |
| Předmět: |
Male
Active ingredient chemistry.chemical_classification Polymers Proteins Pharmaceutical Science Polymer Microspheres Dosage form Rats Rats Sprague-Dawley PLGA chemistry.chemical_compound Polylactic Acid-Polyglycolic Acid Copolymer chemistry Chemical engineering In vivo Delayed-Action Preparations Polymer chemistry Animals Liberation Lactic Acid Solubility Drug carrier Polyglycolic Acid |
| Zdroj: | Journal of Pharmaceutical Sciences. 92:1582-1591 |
| ISSN: | 0022-3549 |
| DOI: | 10.1002/jps.10414 |
| Popis: | A central issue in controlled delivery of therapeutics from biodegradable microspheres is the immediate burst of drug release upon injection. This burst is often observed with microsphere systems made by the double emulsion (w/o/w) technique, and may be prevented by improving the drug distribution throughout the polymer matrix. To this end, protein and polymer (poly-lactide-co-glycolide or PLGA) were dissolved within the same solvent system, and micron-sized microspheres were created from this solution by spontaneous emulsification. Improved protein loading was achieved by ion-pairing the protein with charged surfactants to increase solubility in the single-phase solvent system. Both in vitro and in vivo results showed a much diminished burst: compared to microspheres made by double emulsion, it was reduced over 10-fold. |
| Databáze: | OpenAIRE |
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