title: Protein stabilization in aqueous solutions of polyphosphazene polyelectrolyte and non-ionic surfactants.
abstract: Applications of polyelectrolytes as pharmaceutical excipients or biologically active agents generated an increased interest in formulations, in which ionic macromolecules share the same milieu with protein drugs or vaccine antigens. Macromolecular interactions, which often take place in such systems, can potentially impact formulation activity and stability. The present article reports that poly[di(carboxylatophenoxy)phosphazene], disodium salt (PCPP), which has been previously shown to be a potent vaccine adjuvant, also displays a strong protein stabilizing effect in aqueous solutions that can be significantly amplified in the presence of nonionic surfactants. The phenomenon is studied in the context of macromolecular interactions in the system and is linked to the formation of PCPP-protein and PCPP-protein-surfactant complexes.
authors.affiliation: Apogee Technology, Inc., 129 Morgan Drive, Norwood, Massachusetts 02062, USA.
authors.forename: Alexander
authors.initials: A
authors.lastname: Marin
authors.forename: Daniel P
authors.initials: DP
authors.lastname: Decollibus
authors.forename: Alexander K
authors.initials: AK
authors.lastname: Andrianov
mesh_terms: D000276:Adjuvants, Immunologic; D000818:Animals; D002417:Cattle; D006735:Horseradish Peroxidase / Q000737:chemistry* / Q000378:metabolism; D011108:Polymers / Q000737:chemistry* / Q000378:metabolism; D012710:Serum Albumin, Bovine / Q000737:chemistry / Q000378:metabolism; D013501:Surface-Active Agents / Q000737:chemistry* / Q000378:metabolism
chemical_list: D000276:Adjuvants, Immunologic; D011108:Polymers; D013501:Surface-Active Agents; C045869:polybis(carbophenoxypropane); D012710:Serum Albumin, Bovine; D006735:Horseradish Peroxidase