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http://doi.org/10.25358/openscience-8018
Autoren: | Settanni, Giovanni Brill, Wolfgang Haas, Heinrich Schmid, Friederike |
Titel: | pH-dependent behavior of ionizable cationic lipids in mRNA-carrying lipoplexes investigated by molecular dynamics simulations |
Online-Publikationsdatum: | 24-Okt-2022 |
Erscheinungsdatum: | 2022 |
Sprache des Dokuments: | Englisch |
Zusammenfassung/Abstract: | Lipid-based nanoparticles and lipoplexes containing ionizable lipids are among the most successful nanocarriers for mRNA-based therapies. The molecular structure of these assemblies is still not fully understood, as well as the role played by the ionizable lipids. SAXS experiments have shown that lipoplexes including the ionizable lipid 2-dioleyloxy-N,N-dimethyl-3-aminopropane (DODMA), under specific conditions, have a lamellar structure, where lipid bilayers are separated by mRNA-rich layers, with an overall spacing between 6.5 and 8.0 nm and a complex pH-dependence. Here, the structure and dynamics of these lipoplexes are investigated at varying pH and mRNA concentration using multiscale molecular dynamics simulations. It is observed that the interaction between DODMA and RNA is slightly attractive only at low pH levels, while it becomes effectively repulsive at high and intermediate pH. This results into a pH-dependent relocation of the RNA inside the multilayers, from the lipid head groups at low pH to a more uniform distribution inside the hydrophilic slabs of the multilayers at high pH. It is also observed that at high pH, DODMA lipids shift toward the hydrophobic part of the bilayer, consequently increasing their leaflet-flipping rate, a phenomenon which may ultimately affect the fusion process of the lipoplex with the endosomal membrane. |
DDC-Sachgruppe: | 530 Physik 530 Physics |
Veröffentlichende Institution: | Johannes Gutenberg-Universität Mainz |
Organisationseinheit: | FB 08 Physik, Mathematik u. Informatik |
Veröffentlichungsort: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-8018 |
Version: | Published version |
Publikationstyp: | Zeitschriftenaufsatz |
Nutzungsrechte: | CC BY-NC-ND |
Informationen zu den Nutzungsrechten: | https://creativecommons.org/licenses/by-nc-nd/4.0/ |
Zeitschrift: | Macromolecular rapid communications 43 12 |
Seitenzahl oder Artikelnummer: | 2100683 |
Verlag: | Wiley-VCH |
Verlagsort: | Weinheim |
Erscheinungsdatum: | 2022 |
ISSN: | 1521-3927 |
DOI der Originalveröffentlichung: | 10.1002/marc.202100683 |
Enthalten in den Sammlungen: | JGU-Publikationen |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | ||
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phdependent_behavior_of_ioniz-20221014124728790.pdf | 5.73 MB | Adobe PDF | Öffnen/Anzeigen |