Hydrogel-Forming Microneedle Arrays for Enhanced Transdermal Drug Delivery

Unique microneedle arrays prepared from crosslinked polymers, which contain no drug themselves, are described. They rapidly take up skin interstitial fluid upon skin insertion to form continuous, unblockable, hydrogel conduits from attached patch‐type drug reservoirs to the dermal microcirculation....

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Bibliographic Details
Published in:Advanced functional materials 2012-12, Vol.22 (23), p.4879-4890
Main Authors: Donnelly, Ryan F., Singh, Thakur Raghu Raj, Garland, Martin J., Migalska, Katarzyna, Majithiya, Rita, McCrudden, Cian M., Kole, Prashant Laxman, Mahmood, Tuan Mazlelaa Tuan, McCarthy, Helen O., Woolfson, A. David
Format: Article
Language:English
Subjects:
biocompatibility
drug delivery
hydrogels
microneedles
safety
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Summary:Unique microneedle arrays prepared from crosslinked polymers, which contain no drug themselves, are described. They rapidly take up skin interstitial fluid upon skin insertion to form continuous, unblockable, hydrogel conduits from attached patch‐type drug reservoirs to the dermal microcirculation. Importantly, such microneedles, which can be fabricated in a wide range of patch sizes and microneedle geometries, can be easily sterilized, resist hole closure while in place, and are removed completely intact from the skin. Delivery of macromolecules is no longer limited to what can be loaded into the microneedles themselves and transdermal drug delivery is now controlled by the crosslink density of the hydrogel system rather than the stratum corneum, while electrically modulated delivery is also a unique feature. This technology has the potential to overcome the limitations of conventional microneedle designs and greatly increase the range of the type of drug that is deliverable transdermally, with ensuing benefits for industry, healthcare providers and, ultimately, patients. Microneedle arrays prepared from crosslinked polymers, which contain no drug themselves, are described. They rapidly take up skin interstitial fluid upon skin insertion to form continuous, unblockable, hydrogel conduits from attached patch‐type drug reservoirs to the dermal microcirculation. This technology has the potential to further enhance the capabilities of microneedle strategies for transdermal drug delivery, while bypassing current difficulties.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.201200864