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Production of Elastin-like Protein Hydrogels for Encapsulation and Immunostaining of Cells in 3D

Production of Elastin-like Protein Hydrogels for Encapsulation and Immunostaining of Cells in 3D

Published on: May 19, 2018

Human plasma protein adsorption to elastinlike polypeptide nanoparticles.

Markian S Bahniuk¹, Abdullah K Alshememry², Larry D Unsworth¹

¹Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada.

|April 2, 2020

Summary

Elastin-like polypeptide (ELP) nanoparticles adsorb significant albumin but still trigger immune responses via immunoglobulin G and complement factor 3. Physicochemical properties influence protein adsorption and blood clotting inhibition.

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Hydrogel Nanoparticle Harvesting of Plasma or Urine for Detecting Low Abundance Proteins

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Published on: August 7, 2014

Area of Science:

Biomaterials Science
Protein Chemistry
Immunology

Background:

Elastin-like polypeptides (ELPs) show promise for biomedical uses.
Limited understanding of ELP biocompatibility exists, with conflicting literature data.
Protein adsorption critically impacts blood-contacting biomaterial performance.

Purpose of the Study:

To investigate the biocompatibility of ELP-based nanoparticles.
To analyze the adsorbed proteome from human plasma on ELP nanoparticles.
To correlate nanoparticle physicochemical properties (diameter, hydrophobicity, chain length) with protein adsorption and blood clotting.

Main Methods:

Characterization of protein adsorption on eight different ELP nanoparticle systems using platelet-poor human plasma.
Analysis of nanoparticle diameter, amino acid hydrophobicity, and chain length.
Assessment of plasma clotting inhibition by ELP nanoparticles.

Main Results:

All ELP constructs adsorbed substantial albumin, immunoglobulin G, and activated complement factor 3.
Variations in plasminogen, fibronectin, fibrinogen, antithrombin, and alpha2 macroglobulin adsorption were observed.
ELP nanoparticles exhibited slight inhibition of blood clotting, with shorter/hydrophilic constructs showing greater inhibition.

Conclusions:

ELP nanoparticles may elicit humoral immune responses (IgG, C3 activation) despite high albumin adsorption.
Biocompatibility is influenced by nanoparticle properties, affecting protein adsorption and clotting.
Further research is needed to fully understand ELP nanoparticle interactions with blood components.