Cell membranes, mediator of many biological mechanisms from adhesion and metabolism up to mutation and infection, are highly dynamic and heterogeneous environments exhibiting a strong coupling between biochemical events and structural re-organisation. This involves conformational changes induced, at lower scales, by lipid order transitions and by the micro-mechanical interplay of lipids with transmembrane proteins and molecular diffusion. Particular attention is focused on lipid rafts, ordered lipid microdomains rich of signalling proteins, that co-localise to enhance substance trafficking and activate different intracellular biochemical pathways. In this framework, the theoretical modelling of the dynamic clustering of lipid rafts implies a full multiphysics coupling between the kinetics of phase changes and the mechanical work performed by transmembrane proteins on lipids, involving the bilayer elasticity. This mechanism produces complex interspecific dynamics in which membrane stresses and chemical potentials do compete by determining different morphological arrangements, alteration in diffusive walkways and coalescence phenomena, with a consequent influence on both signalling potential and intracellular processes. Therefore, after identifying the leading chemo-mechanical interactions, the present work investigates from a modelling perspective the spatio-temporal evolution of raft domains to theoretically explain co-localisation and synergy between proteins' activation and raft formation, by coupling diffusive and mechanical phenomena to observe different morphological patterns and clustering of ordered lipids. This could help to gain new insights into the remodelling of cell membranes and could potentially suggest mechanically based strategies to control their selectivity, by orienting intracellular functions and mechanotransduction.

Modelling Lipid Rafts Formation through Chemo-Mechanical Interplay Triggered by Receptor–Ligand Binding / Bernard, C.; Carotenuto, A. R.; Pugno, N. M.; Fraldi, M.; Deseri, L.. - In: BIOMECHANICS AND MODELING IN MECHANOBIOLOY. - ISSN 1617-7940. - ELETTRONICO. - 23:2(2024), pp. 485-505. [10.1007/s10237-023-01787-2]

Modelling Lipid Rafts Formation through Chemo-Mechanical Interplay Triggered by Receptor–Ligand Binding

Bernard C.
Primo
;
Pugno N. M.;Fraldi M.;Deseri L.
Ultimo
2024-01-01

Abstract

Cell membranes, mediator of many biological mechanisms from adhesion and metabolism up to mutation and infection, are highly dynamic and heterogeneous environments exhibiting a strong coupling between biochemical events and structural re-organisation. This involves conformational changes induced, at lower scales, by lipid order transitions and by the micro-mechanical interplay of lipids with transmembrane proteins and molecular diffusion. Particular attention is focused on lipid rafts, ordered lipid microdomains rich of signalling proteins, that co-localise to enhance substance trafficking and activate different intracellular biochemical pathways. In this framework, the theoretical modelling of the dynamic clustering of lipid rafts implies a full multiphysics coupling between the kinetics of phase changes and the mechanical work performed by transmembrane proteins on lipids, involving the bilayer elasticity. This mechanism produces complex interspecific dynamics in which membrane stresses and chemical potentials do compete by determining different morphological arrangements, alteration in diffusive walkways and coalescence phenomena, with a consequent influence on both signalling potential and intracellular processes. Therefore, after identifying the leading chemo-mechanical interactions, the present work investigates from a modelling perspective the spatio-temporal evolution of raft domains to theoretically explain co-localisation and synergy between proteins' activation and raft formation, by coupling diffusive and mechanical phenomena to observe different morphological patterns and clustering of ordered lipids. This could help to gain new insights into the remodelling of cell membranes and could potentially suggest mechanically based strategies to control their selectivity, by orienting intracellular functions and mechanotransduction.
2024
2
Bernard, C.; Carotenuto, A. R.; Pugno, N. M.; Fraldi, M.; Deseri, L.
Modelling Lipid Rafts Formation through Chemo-Mechanical Interplay Triggered by Receptor–Ligand Binding / Bernard, C.; Carotenuto, A. R.; Pugno, N. M.; Fraldi, M.; Deseri, L.. - In: BIOMECHANICS AND MODELING IN MECHANOBIOLOY. - ISSN 1617-7940. - ELETTRONICO. - 23:2(2024), pp. 485-505. [10.1007/s10237-023-01787-2]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/405510
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