Membranes: Where Chemistry and Physics Converge for Biology

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Biological Membranes".

Deadline for manuscript submissions: 20 January 2026 | Viewed by 439

Special Issue Editors


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Guest Editor
National Heart and Lung Institute, Imperial College London, London SW3 6LY, UK
Interests: fluorescence fluctuation; molecular dynamics; super-resolution microscopy; membrane models
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Centre for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, Singapore
Interests: self-assembly; polymer-lipid hybrid vesicle; giant unilamellar vesicles; protein-lipid complexes; biomimetic model; membrane biophysics; cancer cell biology; protein folding; membrane protein; membrane interaction
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Biological membranes, specifically lipid bilayers, serve as hubs for cellular communication. They are not merely a structural interface segregating cells from the extracellular environment; rather, their compositional units are highly dynamic and heterogeneous, and the 2D surface provides them with the supportive conditions ideal for initiating and sustaining biological functions. The remarkable diversity in molecular composition, including phospholipids, cholesterol, sphingolipids, and integral membrane proteins, governs the physicochemical properties of these membranes, such as mechanical stiffness, spontaneous curvature, and electrostatic characteristics. Emerging studies are unraveling the crucial role of such mechanochemical features and the collective behavior of membranes in cellular functions. For instance, the stiffness and fluidity of the membrane, which are intrinsically related to lipid composition, play a key role in potentiating membrane-receptor signaling in immune cells, such as T cells and NK cells. However, this is an active area of research that has not yet matured.

With the success of mRNA vaccines against COVID-19, which has prevented millions of deaths around the world, drug delivery platforms such as liposomes, and particularly their membranes, are once again at the centre of global attention. Liposomes are effective carriers for mRNA in COVID-19 vaccines, but they lack tissue specificity, thereby resulting in off-target effects that harm healthy cells. Next-generation drug delivery particles should therefore be able to overcome these challenges. Significant attention is given to naturally derived membrane-based drug delivery particles and innovative biomimetic platforms with precisely controlled membrane mechanical properties and functionally engineered surfaces. Studies using naturally produced extracellular vesicles (EVs) provide compelling evidence of their superiority over conventional liposomes, particularly demonstrating prolonged persistence in peripheral blood and minimal toxicity.

Dr. Dilip Shrestha
Dr. James Ho
Guest Editors

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • stiffness
  • membrane curvature
  • membrane heterogeneity
  • liposomes
  • next-generation drug delivery particles
  • biomimetic nanoparticles
  • membrane mechanics
  • computer simulation of membrane
  • fluorescence correlations spectroscopy

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Published Papers (1 paper)

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Research

15 pages, 9628 KB  
Article
Curvature-Induced Membrane Remodeling by the Cell-Penetrating Peptide Pep-1
by Yasith Indigahawela Gamage and Jianjun Pan
Membranes 2025, 15(12), 373; https://doi.org/10.3390/membranes15120373 - 3 Dec 2025
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Abstract
The cell-penetrating peptide Pep-1 interacts with lipid membranes through combined electrostatic and hydrophobic forces, yet the structural details of its membrane remodeling activity remain unclear. Using atomic force microscopy (AFM), we examined how Pep-1 perturbs supported lipid bilayers of varying composition and geometry. [...] Read more.
The cell-penetrating peptide Pep-1 interacts with lipid membranes through combined electrostatic and hydrophobic forces, yet the structural details of its membrane remodeling activity remain unclear. Using atomic force microscopy (AFM), we examined how Pep-1 perturbs supported lipid bilayers of varying composition and geometry. In zwitterionic POPC bilayer patches, Pep-1 preferentially targeted patch boundaries, where lipid packing is less constrained, leading to edge erosion and detergent-like disintegration. Incorporation of anionic POPS enhanced peptide binding and localized disruption, giving rise to elevated annular rims, holes, and peptide–lipid aggregates. In cholesterol-containing POPC bilayer patches, Pep-1 induced extensive surface reorganization marked by protruded, ridge-like features, consistent with lipid redistribution and curvature generation. In continuous POPC/POPS bilayers lacking free edges, Pep-1 formed discrete, flower-like protrusions that coalesced into an interconnected network of thickened peptide-rich domains. These findings reveal composition-dependent remodeling pathways in which Pep-1 destabilizes, reorganizes, or curves membranes according to their mechanical and electrostatic properties, providing new insight into peptide–membrane interactions relevant to cell-penetrating peptide translocation. Full article
(This article belongs to the Special Issue Membranes: Where Chemistry and Physics Converge for Biology)
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