Abstract:
:We describe investigations of insulin release from thermoresponsive microgels using variable temperature (1)H NMR. Microgel particles composed of poly(N-isopropylacrylamide) were loaded with the peptide via a swelling technique, and this method was compared to simple equilibrium partitioning. Variable temperature (1)H NMR studies suggest that the swelling loading method results in enhanced entrapment of the peptide versus equilibrium partitioning. A centrifugation-loading assay supports this finding. Pseudo-temperature jump (1)H NMR measurements suggest that the insulin release rate is partially decoupled from microgel collapse. These types of direct release investigations could prove to be useful methods in the future design of controlled macromolecule drug delivery devices.
journal_name
Biomacromoleculesjournal_title
Biomacromoleculesauthors
Nolan CM,Gelbaum LT,Lyon LAdoi
10.1021/bm060718ssubject
Has Abstractpub_date
2006-10-01 00:00:00pages
2918-22issue
10eissn
1525-7797issn
1526-4602journal_volume
7pub_type
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journal_title:Biomacromolecules
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journal_title:Biomacromolecules
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