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Pre-administration of PepFect6-microRNA-146a nanocomplexes inhibits inflammatory responses in keratinocytes and in a mouse model of irritant contact dermatitis
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Number of Authors: 14
2016 (English)In: Journal of Controlled Release, ISSN 0168-3659, E-ISSN 1873-4995, Vol. 235, 195-204 p.Article in journal (Refereed) Published
Abstract [en]

The skin is a difficult to access tissue for efficient delivery of large and/or chargedmacromolecules, including therapeutic DNA and RNA oligonucleotides. Cell-penetrating peptide PepFect6 (PF6) has been shown to be suitable transport vehicle for siRNAs in cell culture and systemically in vivo in mice. MiR-146a is known as anti-inflammatory miRNA that inhibits multiple factors fromthe nuclear factor (NF)-kappa B pathway in various cell types, including keratinocytes. In this study, PF6 was shown to form unimodal nanocomplexes with miR-146a mimic that entered into human primary keratinocytes, where miR-146a inhibited the expression of its direct targets fromthe NF-kappa B pathway and the genes known to be activated by NF-kappa B, C-C motif ligand (CCL)5 and interleukin (IL)-8. The transfection of miR-146a mimic with PF6 was more efficient in sub-confluent keratinocyte cultures, affected keratinocyte proliferation less and had similar effect on cell viability when compared with a lipid based agent. Subcutaneous pre-administration of PF6-miR-146a nanocomplexes attenuated ear-swelling and reduced the expression of pro-inflammatory cytokines and chemokines IL-6, CCL11, CCL24 and C-X-C motif ligand 1 (CXCL1) in a mouse model of irritant contact dermatitis. Our data demonstrates that PF6-miR-146a nanoparticles might have potential in the development of therapeutics to target inflammatory skin diseases.

Place, publisher, year, edition, pages
2016. Vol. 235, 195-204 p.
Keyword [en]
MicroRNA, Allergy, Non-coding RNA, SiRNA
National Category
Biological Sciences Pharmacology and Toxicology
URN: urn:nbn:se:su:diva-132923DOI: 10.1016/j.jconrel.2016.06.006ISI: 000379702700019PubMedID: 27269729OAI: diva2:957523
Available from: 2016-09-02 Created: 2016-08-26 Last updated: 2016-09-02Bibliographically approved

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Langel, Ülo
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Department of Neurochemistry
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