The role of lipid geometry in designing liposomes for the solubilisation of poorly water soluble drugs

M. Habib Ali; Behfar Moghaddam; Daniel J. Kirby; Afzal R. Mohammed; Yvonne Perrie

doi:10.1016/j.ijpharm.2012.06.056

The role of lipid geometry in designing liposomes for the solubilisation of poorly water soluble drugs

M. Habib Ali, Behfar Moghaddam, Daniel J. Kirby, Afzal R. Mohammed, Yvonne Perrie

Research output: Contribution to journal › Article › peer-review

Abstract

Liposomes are well recognised for their ability to improve the delivery of a range of drugs. More commonly they are applied for the delivery of water-soluble drugs, but given their structural attributes, they can also be employed as solubilising agents for low solubility drugs as well as drug targeting agents. To further explore the potential of liposomes as solubilising agents, we have investigated the role of bilayer packaging in promoting drug solubilisation in liposome bilayers. The effect of alkyl chain length and symmetry was investigated to consider if using 'mis-matched' phospholipids could create 'voids' within the bilayers, and enhance bilayer loading capacity. Lipid packing was investigated using Langmuir studies, which demonstrated that increasing the alkyl chain length enhanced lipid packing, with condensed monolayers forming, whilst asymmetric lipids formed less condensed monolayers. However, this more open packing did not translate into improved drug loading, with the longer chain, condensed bilayers formed from long-chain, saturated lipids offering higher drug loading capacity. These studies demonstrate that liposomes formulated from longer chain, saturated lipids offer enhanced solubilisation capacity. However the molecular size, rather than lipophilicity, of the drug to be incorporated was also a key factor dominating bilayer incorporation efficiency. © 2012 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	225-232
Number of pages	8
Journal	International Journal of Pharmaceutics
Volume	453
Issue number	1
Early online date	2 Jul 2012
DOIs	https://doi.org/10.1016/j.ijpharm.2012.06.056
Publication status	Published - 30 Aug 2013

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Controlled Release. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Ali, MH, Moghaddam, B, Kirby, DJ, Mohammed, AR & Perrie, Y, 'The role of lipid geometry in designing liposomes for the solubilisation of poorly water soluble drugs' International journal of pharmaceutics, vol 453, no. 1 (2012) DOI http://dx.doi.org/10.1016/j.ijpharm.2012.06.056

M. Habib Ali was funded the Engineering and Physical Sciences Research Council (Grant GR/S61287/01). Behfar Moghaddam was funded by an Aston University International Student Scholarship.

Supplementary data available on the journal website.

Keywords

liposomes
low soluble drugs
Bilayer drug loading
solubilisation
monolayer studies

Access to Document

10.1016/j.ijpharm.2012.06.056

Lipid geometry in designing liposomes for the solubilisation of poorly water soluble drugs
NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Controlled Release. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Ali, MH, Moghaddam, B, Kirby, DJ, Mohammed, AR & Perrie, Y, 'The role of lipid geometry in designing liposomes for the solubilisation of poorly water soluble drugs' International journal of pharmaceutics, vol 453, no. 1 (2012) DOI http://dx.doi.org/10.1016/j.ijpharm.2012.06.056
Accepted author manuscript, 555 KB

Cite this

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abstract = "Liposomes are well recognised for their ability to improve the delivery of a range of drugs. More commonly they are applied for the delivery of water-soluble drugs, but given their structural attributes, they can also be employed as solubilising agents for low solubility drugs as well as drug targeting agents. To further explore the potential of liposomes as solubilising agents, we have investigated the role of bilayer packaging in promoting drug solubilisation in liposome bilayers. The effect of alkyl chain length and symmetry was investigated to consider if using 'mis-matched' phospholipids could create 'voids' within the bilayers, and enhance bilayer loading capacity. Lipid packing was investigated using Langmuir studies, which demonstrated that increasing the alkyl chain length enhanced lipid packing, with condensed monolayers forming, whilst asymmetric lipids formed less condensed monolayers. However, this more open packing did not translate into improved drug loading, with the longer chain, condensed bilayers formed from long-chain, saturated lipids offering higher drug loading capacity. These studies demonstrate that liposomes formulated from longer chain, saturated lipids offer enhanced solubilisation capacity. However the molecular size, rather than lipophilicity, of the drug to be incorporated was also a key factor dominating bilayer incorporation efficiency. {\textcopyright} 2012 Elsevier B.V. All rights reserved.",

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The role of lipid geometry in designing liposomes for the solubilisation of poorly water soluble drugs

Abstract

Bibliographical note

Keywords

Access to Document

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Engineering liposomal systems to develop solubility enhancing technology

Cite this

The role of lipid geometry in designing liposomes for the solubilisation of poorly water soluble drugs

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Student theses

Engineering liposomal systems to develop solubility enhancing technology

Cite this