UM  > Institute of Chinese Medical Sciences
Residential Collegefalse
Status已發表Published
Investigating the role of cholesterol in the formation of non-ionic surfactant based bilayer vesicles: Thermal analysis and molecular dynamics
Wilkhu J.S.2; Ouyang D.2; Kirchmeier M.J.1; Anderson D.E.1; Perrie Y.2
2014-01-30
Source PublicationInternational Journal of Pharmaceutics
ISSN18733476 03785173
Volume461Issue:1-2Pages:331-341
Abstract

The aim of this research was to investigate the molecular interactions occurring in the formulation of non-ionic surfactant based vesicles composed monopalmitoyl glycerol (MPG), cholesterol (Chol) and dicetyl phosphate (DCP). In the formulation of these vesicles, the thermodynamic attributes and surfactant interactions based on molecular dynamics, Langmuir monolayer studies, differential scanning calorimetry (DSC), hot stage microscopy and thermogravimetric analysis (TGA) were investigated. Initially the melting points of the components individually, and combined at a 5:4:1 MPG:Chol:DCP weight ratio, were investigated; the results show that lower (90 C) than previously reported (120-140 C) temperatures could be adopted to produce molten surfactants for the production of niosomes. This was advantageous for surfactant stability; whilst TGA studies show that the individual components were stable to above 200 C, the 5:4:1 MPG:Chol:DCP mixture show ∼2% surfactant degradation at 140 C, compared to 0.01% was measured at 90 C. Niosomes formed at this lower temperature offered comparable characteristics to vesicles prepared using higher temperatures commonly reported in literature. In the formation of niosome vesicles, cholesterol also played a key role. Langmuir monolayer studies demonstrated that intercalation of cholesterol in the monolayer did not occur in the MPG:Chol:DCP (5:4:1 weight ratio) mixture. This suggests cholesterol may support bilayer assembly, with molecular simulation studies also demonstrating that vesicles cannot be built without the addition of cholesterol, with higher concentrations of cholesterol (5:4:1 vs 5:2:1, MPG:Chol:DCP) decreasing the time required for niosome assembly. © 2013 Elsevier B.V.

KeywordDifferential Scanning Calorimetry Molecular Dynamics Monolayer Niosomes Particle Size Surface Charge
DOI10.1016/j.ijpharm.2013.11.063
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaPharmacology & Pharmacy
WOS SubjectPharmacology & Pharmacy
WOS IDWOS:000329861400038
Scopus ID2-s2.0-84891614318
Fulltext Access
Citation statistics
Document TypeJournal article
CollectionInstitute of Chinese Medical Sciences
Affiliation1.Variation Biotechnologies
2.Aston University
Recommended Citation
GB/T 7714
Wilkhu J.S.,Ouyang D.,Kirchmeier M.J.,et al. Investigating the role of cholesterol in the formation of non-ionic surfactant based bilayer vesicles: Thermal analysis and molecular dynamics[J]. International Journal of Pharmaceutics, 2014, 461(1-2), 331-341.
APA Wilkhu J.S.., Ouyang D.., Kirchmeier M.J.., Anderson D.E.., & Perrie Y. (2014). Investigating the role of cholesterol in the formation of non-ionic surfactant based bilayer vesicles: Thermal analysis and molecular dynamics. International Journal of Pharmaceutics, 461(1-2), 331-341.
MLA Wilkhu J.S.,et al."Investigating the role of cholesterol in the formation of non-ionic surfactant based bilayer vesicles: Thermal analysis and molecular dynamics".International Journal of Pharmaceutics 461.1-2(2014):331-341.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wilkhu J.S.]'s Articles
[Ouyang D.]'s Articles
[Kirchmeier M.J.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wilkhu J.S.]'s Articles
[Ouyang D.]'s Articles
[Kirchmeier M.J.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wilkhu J.S.]'s Articles
[Ouyang D.]'s Articles
[Kirchmeier M.J.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.