Cubosomes for topical delivery of the antimicrobial peptide LL-37
Boge, Lukas ; Hallstensson, Karin ; Ringstad, Lovisa ; Johansson, Jenny ; Andersson, Therese ; Davoudi, Mina LU
; Larsson, Per Tomas
; Mahlapuu, Margit
; Håkansson, Joakim
and Andersson, Martin
(2019)
In European Journal of Pharmaceutics and Biopharmaceutics
134.
p.60-67
- Abstract
In this study, the use of cubosomes for topical delivery of the antimicrobial peptide (AMP) LL-37 was investigated. Topical delivery of AMPs is of great interest for treatment of skin infections caused by bacteria, such as Staphylococcus aureus. AMP containing cubosomes were produced by three different preparation protocols and compared: (i) pre-loading, where LL-37 was incorporated into a liquid crystalline gel, which thereafter was dispersed into nanoparticles, (ii) post-loading, where LL-37 was let to adsorb onto pre-formed cubosomes, and (iii) hydrotrope-loading, where LL-37 was incorporated during the spontaneously formed cubosomes in an ethanol/glycerol monooleate mixture. Particle size and size distribution were analyzed using... (More)
In this study, the use of cubosomes for topical delivery of the antimicrobial peptide (AMP) LL-37 was investigated. Topical delivery of AMPs is of great interest for treatment of skin infections caused by bacteria, such as Staphylococcus aureus. AMP containing cubosomes were produced by three different preparation protocols and compared: (i) pre-loading, where LL-37 was incorporated into a liquid crystalline gel, which thereafter was dispersed into nanoparticles, (ii) post-loading, where LL-37 was let to adsorb onto pre-formed cubosomes, and (iii) hydrotrope-loading, where LL-37 was incorporated during the spontaneously formed cubosomes in an ethanol/glycerol monooleate mixture. Particle size and size distribution were analyzed using dynamic light scattering (DLS), liquid crystalline structure by small angle x-ray scattering (SAXS) and release of LL-37 by a fluorescamine assay. Proteolytic protection of LL-37 as well as bactericidal effect after enzyme exposure was investigated. The skin irritation potential of cubosomes was examined by an in vitro epidermis model. Finally, the bacterial killing property of the cubosomes was examined by an ex vivo pig skin wound infection model with Staphylococcus aureus. Data showed that a high loading of LL-37 induced formation of vesicles in case of cubosomes prepared by sonication (pre-loading). No release of LL-37 was observed from the cubosomes, indicating strong association of the peptide to the particles. Proteolysis studies showed that LL-37 was fully protected against enzymatic attacks while associated with the cubosomes, also denoting strong association of the peptide to the particles. As a consequence, bactericidal effect after enzyme exposure remained, compared to pure LL-37 which was subjected to proteolysis. No skin irritation potential of the cubosomes was found, thus enabling for topical administration. The ex vivo wound infection model showed that LL-37 in pre-loaded cubosomes killed bacteria most efficient.
(Less)
- author
- Boge, Lukas
; Hallstensson, Karin
; Ringstad, Lovisa
; Johansson, Jenny
; Andersson, Therese
; Davoudi, Mina
LU
; Larsson, Per Tomas
; Mahlapuu, Margit
; Håkansson, Joakim
and Andersson, Martin
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Antimicrobial peptide, Cubosome, Infection, LL-37, Proteolysis, Skin irritation, Topical delivery
- in
- European Journal of Pharmaceutics and Biopharmaceutics
- volume
- 134
- pages
- 8 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:85056876558
- pmid:30445164
- ISSN
- 0939-6411
- DOI
- 10.1016/j.ejpb.2018.11.009
- language
- English
- LU publication?
- yes
- id
- e19a563c-691c-4646-88cc-4cd32436422f
- date added to LUP
- 2018-12-03 09:49:00
- date last changed
- 2024-04-01 16:30:27
@article{e19a563c-691c-4646-88cc-4cd32436422f,
abstract = {{<p>In this study, the use of cubosomes for topical delivery of the antimicrobial peptide (AMP) LL-37 was investigated. Topical delivery of AMPs is of great interest for treatment of skin infections caused by bacteria, such as Staphylococcus aureus. AMP containing cubosomes were produced by three different preparation protocols and compared: (i) pre-loading, where LL-37 was incorporated into a liquid crystalline gel, which thereafter was dispersed into nanoparticles, (ii) post-loading, where LL-37 was let to adsorb onto pre-formed cubosomes, and (iii) hydrotrope-loading, where LL-37 was incorporated during the spontaneously formed cubosomes in an ethanol/glycerol monooleate mixture. Particle size and size distribution were analyzed using dynamic light scattering (DLS), liquid crystalline structure by small angle x-ray scattering (SAXS) and release of LL-37 by a fluorescamine assay. Proteolytic protection of LL-37 as well as bactericidal effect after enzyme exposure was investigated. The skin irritation potential of cubosomes was examined by an in vitro epidermis model. Finally, the bacterial killing property of the cubosomes was examined by an ex vivo pig skin wound infection model with Staphylococcus aureus. Data showed that a high loading of LL-37 induced formation of vesicles in case of cubosomes prepared by sonication (pre-loading). No release of LL-37 was observed from the cubosomes, indicating strong association of the peptide to the particles. Proteolysis studies showed that LL-37 was fully protected against enzymatic attacks while associated with the cubosomes, also denoting strong association of the peptide to the particles. As a consequence, bactericidal effect after enzyme exposure remained, compared to pure LL-37 which was subjected to proteolysis. No skin irritation potential of the cubosomes was found, thus enabling for topical administration. The ex vivo wound infection model showed that LL-37 in pre-loaded cubosomes killed bacteria most efficient.</p>}},
author = {{Boge, Lukas and Hallstensson, Karin and Ringstad, Lovisa and Johansson, Jenny and Andersson, Therese and Davoudi, Mina and Larsson, Per Tomas and Mahlapuu, Margit and Håkansson, Joakim and Andersson, Martin}},
issn = {{0939-6411}},
keywords = {{Antimicrobial peptide; Cubosome; Infection; LL-37; Proteolysis; Skin irritation; Topical delivery}},
language = {{eng}},
pages = {{60--67}},
publisher = {{Elsevier}},
series = {{European Journal of Pharmaceutics and Biopharmaceutics}},
title = {{Cubosomes for topical delivery of the antimicrobial peptide LL-37}},
url = {{http://dx.doi.org/10.1016/j.ejpb.2018.11.009}},
doi = {{10.1016/j.ejpb.2018.11.009}},
volume = {{134}},
year = {{2019}},
}