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Lipid Chains: Supramolecular Behavior and Biological Applications

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Macromolecular Chemistry".

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 1301

Special Issue Editor


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Guest Editor
Laboratoire CEMCA (Chimie Electrochimie Moléculaire, Chimie Analytique), UMR CNRS 6521, Equipe Chimie Organique Santé Matériaux, Université de Brest (UBO), Brest, France
Interests: amphiphiles; phospholipids;fluorescent lipids; phosphorus chemistry; genes delivery; antimicrobials; antifouling; physicochemistry; cystic fibrosis
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Special Issue Information

Dear colleagues,

This Special Issue entitled "Lipid Chains: Supramolecular Behavior and Biological Applications" aims to highlight recent developments on the impact of the nature of lipid chains of amphiphilic compounds on their self-assembling properties through their physicochemical description, and also the structure–activity relationship between lipid chains and their biological activities.

Lipids are the main building block of biological membranes, and a great structural diversity is present in nature. Membranes are necessary for life, and inside, lipids constitute a biological barrier from the surrounding environment. Additionally, important biochemical reactions take place at the membrane interface. The nature of the lipid chains strongly impacts the permeability and fluidity of cell membranes. For example, bacteria have the capacity to modify the composition of their lipids in response to stress conditions such as acidification of the milieu by decreasing permeability or high temperature by reducing membranes’ fluidity.    

Furthermore, lipid structures and their aggregation properties are key parameters that must be carefully considered when designing drug (or gene) delivery vehicles. The carriers require stability in the bloodstream and fusion properties with the membranes of target cells, and instability once inside the cell to release the cargo. At each step, the physicochemical properties of the carrier can be adjusted by choosing the right lipids. For example, unsaturated lipid chains are known to enhance membrane fusion. Likewise, branched lipid chains are fully described for their propensity to promote more fusogenic inverted hexagonal phases.

This issue concerns all lipids or amphiphilic compounds (natural or synthesized) and the study of their aggregation properties (in water, buffer media, or a dry state) and/or their structure–activity relationship studies (drug delivery, gene delivery, antimicrobial, antifouling properties). Authors are kindly invited to submit original articles or reviews.

Dr. Mathieu Berchel
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 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

  • lipid chain
  • amphiphiles
  • supramolecular assemblies
  • physicochemical studies
  • drug delivery
  • fusion properties
  • biological properties

Published Papers (1 paper)

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Research

23 pages, 9470 KiB  
Article
Solid Lipid Nanoparticles Containing Dopamine and Grape Seed Extract: Freeze-Drying with Cryoprotection as a Formulation Strategy to Achieve Nasal Powders
by Elvira De Giglio, Udo Bakowsky, Konrad Engelhardt, Antonello Caponio, Matteo La Pietra, Stefania Cometa, Stefano Castellani, Lorenzo Guerra, Giuseppe Fracchiolla, Maria Luana Poeta, Rosanna Mallamaci, Rosa Angela Cardone, Stefano Bellucci and Adriana Trapani
Molecules 2023, 28(23), 7706; https://doi.org/10.3390/molecules28237706 - 22 Nov 2023
Cited by 2 | Viewed by 960
Abstract
(1) Background: DA-Gelucire® 50/13-based solid lipid nanoparticles (SLNs) administering the neurotransmitter dopamine (DA) and the antioxidant grape-seed-derived proanthocyanidins (grape seed extract, GSE) have been prepared by us in view of a possible application for Parkinson’s disease (PD) treatment. To develop powders constituted [...] Read more.
(1) Background: DA-Gelucire® 50/13-based solid lipid nanoparticles (SLNs) administering the neurotransmitter dopamine (DA) and the antioxidant grape-seed-derived proanthocyanidins (grape seed extract, GSE) have been prepared by us in view of a possible application for Parkinson’s disease (PD) treatment. To develop powders constituted by such SLNs for nasal administration, herein, two different agents, namely sucrose and methyl-β-cyclodextrin (Me-β-CD), were evaluated as cryoprotectants. (2) Methods: SLNs were prepared following the melt homogenization method, and their physicochemical features were investigated by Raman spectroscopy, Scanning Electron Microscopy (SEM), atomic force microscopy (AFM) and X-ray Photoelectron Spectroscopy (XPS). (3) Results: SLN size and zeta potential values changed according to the type of cryoprotectant and the morphological features investigated by SEM showed that the SLN samples after lyophilization appear as folded sheets with rough surfaces. On the other hand, the AFM visualization of the SLNs showed that their morphology consists of round-shaped particles before and after freeze-drying. XPS showed that when sucrose or Me-β-CD were not detected on the surface (because they were not allocated on the surface or completely absent in the formulation), then a DA surfacing was observed. In vitro release studies in Simulated Nasal Fluid evidenced that DA release, but not the GSE one, occurred from all the cryoprotected formulations. Finally, sucrose increased the physical stability of SLNs better than Me-β-CD, whereas RPMI 2650 cell viability was unaffected by SLN-sucrose and slightly reduced by SLN-Me-β-CD. (4) Conclusions: Sucrose can be considered a promising excipient, eliciting cryoprotection of the investigated SLNs, leading to a powder nasal pharmaceutical dosage form suitable to be handled by PD patients. Full article
(This article belongs to the Special Issue Lipid Chains: Supramolecular Behavior and Biological Applications)
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