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Liposomes as Membrane Models in Drug-Lipid Interactions

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Pharmacology".

Deadline for manuscript submissions: closed (15 March 2024) | Viewed by 2292

Special Issue Editor


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Guest Editor
FP-I3ID (Instituto de Investigação, Inovação e Desenvolvimento Fernando Pessoa), FP-BHS (Biomedical and Health Sciences), Universidade Fernando Pessoa, Praça 9 de Abril, 349, 4249-004 Porto, Portugal
Interests: liposomes; membrane interactions; topical vehicles
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Special Issue Information

Dear Colleagues,

The pharmacokinetics and pharmacodynamics of a pharmacologically active molecule in the human body presuppose, in some phases, the interaction of these molecules with cell membranes. Drug absorption is generally achieved at the expense of molecules migrating across the lipid bilayer, as well as interaction with intramembrane or intracellular receptors that can condition the mechanism of action.

In this context, studies of the interaction of molecules with the membrane can be performed using liposomes, as these lipid structures have a membrane similar to that of cells and whose composition and complexity can be easily modulated. Natural biological membranes have a complex structure, whereas lipid-based membrane models offer a simple and useful alternative for studying drug–membrane interactions.

This Special Issue intends to make a collection of papers in this field, focusing both on liposomes of different compositions and manufacturers used as membrane models and on the techniques used to study these interactions. It is expected that the conclusions are of interest to the scope of Pharmacology and the Pharmaceutical Industry and that future perspectives will also be discussed.

Authors are kindly invited to submit original papers, communications, and reviews regarding the use of liposomes as membrane models, to be published in this Issue of International Journal of Molecular Sciences.

Dr. Carla Matos
Guest Editor

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Keywords

  • liposomes
  • membrane interactions
  • drug development

Published Papers (1 paper)

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Research

22 pages, 4981 KiB  
Article
From Design to Study of Liposome-Driven Drug Release Part 1: Impact of Temperature and pH on Environment
by Violetta Kozik, Danuta Pentak, Marlena Paździor, Andrzej Zięba and Andrzej Bąk
Int. J. Mol. Sci. 2023, 24(14), 11686; https://doi.org/10.3390/ijms241411686 - 20 Jul 2023
Viewed by 1105
Abstract
The marketed drug Doxorubicin (DOX) and the promising anti-cancer agent 9-(N-piperazinyl)-5-methyl-12(H)-quino[3,4-b][1,4]benzothiazinium chloride (9-PBThACl) were used to prepare and compare a range of liposomal delivery systems based on dipalmitoylphosphatidylcholine (DPPC). Liposome-assisted drug release was examined using the spectrophotometric [...] Read more.
The marketed drug Doxorubicin (DOX) and the promising anti-cancer agent 9-(N-piperazinyl)-5-methyl-12(H)-quino[3,4-b][1,4]benzothiazinium chloride (9-PBThACl) were used to prepare and compare a range of liposomal delivery systems based on dipalmitoylphosphatidylcholine (DPPC). Liposome-assisted drug release was examined using the spectrophotometric method. In order to provide in vitro release characteristics of liposomal conjugates (LDPPC/drug vs. LDPPC/drug/drug) as well as to evaluate the impact of temperature and pH buffering on the conformation/polarity of the phospholipid bilayer, the encapsulation efficiency of the liposomes entrapping 9-PBThACl and DOX was calculated. In fact, some competition between the investigated molecules was noticed during the entrapment process because relatively high values of the encapsulation efficiency were observed only for the liposomal complexes containing one trapped drug molecule. An averaged absorbance value enabled us to indicate the pH value of the environment (pH ≈ 6.8), at which the physicochemical property profiles of the liposomal complexes were noticeably changed. Moreover, the operational factors limiting the drug release kinetics from the produced liposomes were mathematically modeled. First-order and Bhaskas models ensured satisfactory compliance with the experimental data for the liposomal complexes buffered at pH values of 5.50, 6.00, and 7.40, respectively. Full article
(This article belongs to the Special Issue Liposomes as Membrane Models in Drug-Lipid Interactions)
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