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Hard polymeric porous microneedles on stretchable substrate for transdermal drug delivery
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Hard polymeric porous microneedles on stretchable substrate for transdermal drug delivery
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Journal Article
Hard polymeric porous microneedles on stretchable substrate for transdermal drug delivery
2022
Overview
Microneedles offer a convenient transdermal delivery route with potential for long term sustained release of drugs. However current microneedle technologies may not have the mechanical properties for reliable and stable penetration (e.g. hydrogel microneedles). Moreover, it is also challenging to realize microneedle arrays with large size and high flexibility. There is also an inherent upper limit to the amount and kind of drugs that can be loaded in the microneedles. In this paper, we present a new class of polymeric porous microneedles made from biocompatible and photo-curable resin that address these challenges. The microneedles are unique in their ability to load solid drug formulation in concentrated form. We demonstrate the loading and release of solid formulation of anesthetic and non-steroidal anti-inflammatory drugs, namely Lidocaine and Ibuprofen. Paper also demonstrates realization of large area (6 × 20 cm
2
) flexible and stretchable microneedle patches capable of drug delivery on any body part. Penetration studies were performed in an ex vivo porcine model supplemented through rigorous compression tests to ensure the robustness and rigidity of the microneedles. Detailed release profiles of the microneedle patches were shown in an in vitro skin model. Results show promise for large area transdermal delivery of solid drug formulations using these porous microneedles.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 639/166
/ Anesthetics, Local - administration & dosage
/ Anesthetics, Local - chemistry
/ Anesthetics, Local - metabolism
/ Animals
/ Anti-Inflammatory Agents, Non-Steroidal - administration & dosage
/ Anti-Inflammatory Agents, Non-Steroidal - chemistry
/ Anti-Inflammatory Agents, Non-Steroidal - metabolism
/ Drug Delivery Systems - instrumentation
/ Hardness
/ Humanities and Social Sciences
/ Ibuprofen - administration & dosage
/ Lidocaine - administration & dosage
/ Needles
/ Nonsteroidal anti-inflammatory drugs
/ Porosity
/ Rigidity
/ Science
/ Skin
