Screening of the binding affinity of serum proteins to lipid nanoparticles in a cell free environment

Research output: Contribution to journalJournal articleResearchpeer-review

Lipid nanoparticles (LNPs) are promising drug and gene carriers. Upon intravenous administration, LNPs’ experience different degree of cellular uptake depending on their formulation. Currently, in vitro and in vivo studies are the gold standard for assessing the fate of nano carriers once administered, but they are time consuming and expensive. In this work, we propose a time and cost-effective method to screen a wide range of LNP formulations and select the most promising candidates for in vitro and in vivo studies. Two different approaches were explored to investigate the binding affinity between LNPs and serum proteins using sensor functionalisation with either protein specific antibody or PEG specific antibody. The first approach allowed to identify the presence of a specific protein in the protein corona of lipid particles (reconstituted and native high-density lipoproteins (rHDL and HDL), and low-density lipoproteins LDL); while the second one provided a versatile platform for the immobilisation of pegylated-particles in order to follow the interaction with serum proteins and hence predict the composition of LNP protein corona. Sensing was done using Quartz Crystal Microbalance with Dissipation (QCM-D) but the approach is extendable to other surface sensing techniques such as Surface Plasmon Resonance (SPR) or ellipsometry.

Original languageEnglish
JournalJournal of Colloid and Interface Science
Volume610
Pages (from-to)766-774
Number of pages9
ISSN0021-9797
DOIs
Publication statusPublished - 2022
Externally publishedYes

Bibliographical note

Funding Information:
The authors thank Dainius Jakubauskas for ApoE4 production and rHDL formation, and Rita del Giudice for ApoA1 production. M.C. thanks the Swedish Research Council for funding [ 2018-04833 and 2018-03990 ]. F.S. thanks the Knowledge Foundation for funding [grant number 20180101 ].

Publisher Copyright:
© 2021 The Authors

    Research areas

  • Binding affinity, Lipid-based nanoparticles, Protein corona, QCM-D

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