Journal
EUROPEAN JOURNAL OF PHARMACEUTICS AND BIOPHARMACEUTICS
Volume 163, Issue -, Pages 212-222Publisher
ELSEVIER
DOI: 10.1016/j.ejpb.2021.04.006
Keywords
Nanoparticles; Poly(lactic-co-glycolic acid); Polylactic acid; Protein corona; Proteomics; Human serum; Human plasma; Hydrophobicity; Molecular weight; Surface chemistry
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The study found that the surface end group identity had the most profound effect on corona composition, matrix polymer hydrophobicity led to similar adsorption profiles on NP systems with similar physicochemical characteristics, molecular weight impacted quantity but not quality of corona bound proteins. Plasma incubated NP showed adsorption of medium-specific proteins but resembled serum incubated NP in terms of protein function, average mass, and isoelectric point.
Poly(DL-lactic-co-glycolic acid) and poly(DL-lactic acid) are widely used for the preparation of nanoparticles due to favorable characteristics for medical use like biodegradability and controllable degradation behavior. The contact with different media like human plasma or serum leads to the formation of a protein corona that determines the NP?s in vivo processing. In this study, the impact of surface end group identity, matrix polymer hydrophobicity, molecular weight, and incubation medium on the protein corona composition was evaluated. Corona proteins were quantified using Bradford assay, separated by SDS-PAGE, and identified via LC-MS/MS. The acquired data revealed that surface end group identity had the most profound effect on corona composition in both quantitative and qualitative terms. Regarding matrix polymer hydrophobicity, adsorption profiles on NP systems with similar physicochemical characteristics resembled each other. The molecular weight of the matrix polymers proved to impact quantity, but not quality of corona bound proteins. The corona of plasma incubated NP showed adsorption of incubation medium-specific proteins but resembled those of serum incubated NP in terms of protein function, average mass and isoelectric point. Overall, the NP physicochemical properties proved to be easily adjustable determining factors of protein corona formation in physiological environments.
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