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- W2002153907 abstract "Diastereoisomeric complexes of insulin with d-poly(lactic acid) (d-PLA) or stereocomplexes of d- and l-PLA entrapping insulin were discovered. The complexes were spontaneously formed when insulin and d-PLA were mixed together in acetonitrile solution. Complexes of insulin–d-PLA formed a microparticulate precipitate after a few hours in the solution. The porous 1–3 μm precipitate, which contained both insulin and d-PLA, was insoluble in solvents that dissolve isotactic PLA, and had an additional transition temperature at 169°C. When suspending these particles in buffer solution of pH 7.4, 37°C, insulin was constantly released for a few weeks. l-PLA or d,l-PLA did not form a precipitate with insulin, which indicates stereospecificity to the complex formation. Microparticulates were also obtained when l-PLA was added to the d-PLA–insulin solution. In this case two types of complexes, d-PLA–insulin and d-PLA–l-PLA complexes, were formed. These macromolecular stereocomplexes may form the onset of the development of a new generation of controlled release systems for peptides and proteins, by molecular complexation with enantiomeric polymers." @default.
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- W2002153907 date "2002-11-01" @default.
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- W2002153907 title "Stereocomplexes based on poly(lactic acid) and insulin: formulation and release studies" @default.
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- W2002153907 doi "https://doi.org/10.1016/s0142-9612(02)00179-5" @default.
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