Cluster Percolation Causes Shear Thinning Behavior in Concentrated Solutions of Monoclonal Antibodies.
Mol Pharm
; 18(7): 2669-2682, 2021 07 05.
Article
in En
| MEDLINE
| ID: mdl-34121411
ABSTRACT
High-concentration (>100 g/L) solutions of monoclonal antibodies (mAbs) are typically characterized by anomalously large solution viscosity and shear thinning behavior for strain rates ≥103 s-1. Here, the link between protein-protein interactions (PPIs) and the rheology of concentrated solutions of COE-03 and COE-19 mAbs is studied by means of static and dynamic light scattering and microfluidic rheometry. By comparing the experimental data with predictions based on the Baxter sticky hard-sphere model, we surprisingly find a connection between the observed shear thinning and the predicted percolation threshold. The longest shear relaxation time of mAbs was much larger than that of model sticky hard spheres within the same region of the phase diagram, which is attributed to the anisotropy of the mAb PPIs. Our results suggest that not only the strength but also the patchiness of short-range attractive PPIs should be explicitly accounted for by theoretical approaches aimed at predicting the shear rate-dependent viscosity of dense mAb solutions.
Key words
Full text:
1
Database:
MEDLINE
Main subject:
Rheology
/
Anisotropy
/
Protein Interaction Domains and Motifs
/
Antibodies, Monoclonal
Type of study:
Etiology_studies
/
Prognostic_studies
Limits:
Humans
Language:
En
Year:
2021
Type:
Article