| Study of the relationship between lipid binding properties of cyclodextrins and their effect on the integrity of liposomes. | |
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MedLine Citation:
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PMID: 17289314 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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It is well known that cyclodextrins are able to extract lipids constituting membranes, increasing their fluidity and permeability. This behaviour towards biological membranes is directly linked to the toxicological effects of methylated cyclodextrins. However, confusion is currently made in the literature between the different methylated cyclodextrin derivatives. Moreover, a new methylated cyclodextrin derivative recently occurred in the market, the Crysmeb. We wanted to compare and understand the effect of the most currently used cyclodextrins on a model membrane. We studied the influence of natural cyclodextrins (betaCD and gammaCD), methylated derivatives (2,6-dimethyl-betaCD (Dimeb), 2,3,6-trimethyl-betaCD (Trimeb) and randomly methylated-betaCD (Rameb), as well as the new derivative Crysmeb), hydroxypropylated derivatives (HPbetaCD of different substitution degrees and HPgammaCD) and the sulfobutylated derivative (SBEbetaCD) on the release of a fluorescent marker encapsulated in the inner cavity of liposomes. It was shown that the observed effect on calcein release can be directly related to the affinity of cyclodextrins for both lipid components of liposomes, cholesterol and phosphatidylcholine. From this relationship, we were able to determine, for each cyclodextrin, a theoretical concentration giving rise to 50% or 100% calcein release. This theoretical concentration was confirmed experimentally. We have also showed that cyclodextrins which provoke calcein release also induce large structure modifications of liposomes. |
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Authors:
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G Piel; M Piette; V Barillaro; D Castagne; B Evrard; L Delattre |
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Publication Detail:
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Type: Journal Article Date: 2007-01-19 |
Journal Detail:
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Title: International journal of pharmaceutics Volume: 338 ISSN: 0378-5173 ISO Abbreviation: Int J Pharm Publication Date: 2007 Jun |
Date Detail:
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Created Date: 2007-05-28 Completed Date: 2007-07-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7804127 Medline TA: Int J Pharm Country: Netherlands |
Other Details:
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Languages: eng Pagination: 35-42 Citation Subset: IM |
Affiliation:
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Laboratory of Pharmaceutical Technology, Department of Pharmacy, University of Liège, CHU, Tour 4, Bat. B36, 1 av. de l'Hôpital, B-4000 Liège, Belgium. Geraldine.piel@ulg.ac.be |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Cholesterol
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chemistry Cyclodextrins / chemistry* Fluoresceins / administration & dosage, chemistry Lipids / chemistry* Liposomes / chemistry* Solubility |
| Chemical | |
Reg. No./Substance:
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0/Cyclodextrins; 0/Fluoresceins; 0/Lipids; 0/Liposomes; 1461-15-0/fluorexon; 57-88-5/Cholesterol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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