Van der Ham, Stijn;
Agudo-Canalejo, Jaime;
Vutukuri, Hanumantha Rao;
(2024)
Role of Shape in Particle-Lipid Membrane Interactions: From Surfing to Full Engulfment.
ACS Nano
10.1021/acsnano.3c11106.
(In press).
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Abstract
Understanding and manipulating the interactions between foreign bodies and cell membranes during endo- and phagocytosis is of paramount importance, not only for the fate of living cells but also for numerous biomedical applications. This study aims to elucidate the role of variables such as anisotropic particle shape, curvature, orientation, membrane tension, and adhesive strength in this essential process using a minimal experimental biomimetic system comprising giant unilamellar vesicles and rod-like particles with different curvatures and aspect ratios. We find that the particle wrapping process is dictated by the balance between the elastic free energy penalty and adhesion free energy gain, leading to two distinct engulfment pathways, tip-first and side-first, emphasizing the significance of the particle orientation in determining the pathway. Moreover, our experimental results are consistent with theoretical predictions in a state diagram, showcasing how to control the wrapping pathway from surfing to partial to complete wrapping by the interplay between membrane tension and adhesive strength. At moderate particle concentrations, we observed the formation of rod clusters, which exhibited cooperative and sequential wrapping. Our study contributes to a comprehensive understanding of the mechanistic intricacies of endocytosis by highlighting how the interplay between the anisotropic particle shape, curvature, orientation, membrane tension, and adhesive strength can influence the engulfment pathway.
| Type: | Article |
|---|---|
| Title: | Role of Shape in Particle-Lipid Membrane Interactions: From Surfing to Full Engulfment |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acsnano.3c11106 |
| Publisher version: | http://dx.doi.org/10.1021/acsnano.3c11106 |
| Language: | English |
| Additional information: | This article is licensed under CC-BY 4.0, https://creativecommons.org/licenses/by/4.0/. |
| Keywords: | Vesicles; Lipid membranes; Anisotropic particles; Wrapping; Passive engulfment; Cellular particle uptake |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10189805 |
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