Journal
CHEMICAL & PHARMACEUTICAL BULLETIN
Volume 68, Issue 11, Pages 1109-1112Publisher
PHARMACEUTICAL SOC JAPAN
DOI: 10.1248/cpb.c20-00585
Keywords
subcutaneous injection; coacervation; bioavailability
Funding
- AMED [JP20mk0101130]
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The occurrence of complex coacervation in an aqueous mixture of proteins (lysozyme, albumin, immunoglobulin G) and hyaluronic acid and its effect on protein transition in a model system was studied to elucidate factors determining the bioavailability of subcutaneously injected therapeutic proteins. Mixing of hyaluronic acid and the model proteins induced complex coacervation at solution pH close to or below the isoelectric point of the proteins. In vitro dialysis using membranes with large pore size tube represented a limitation in the protein transition of the coacervation mixture. Thermal analysis suggested there was retention of the protein conformation in the polymer complex.
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