Dissolvable Microneedle Arrays for Intradermal Delivery of Biologics: Fabrication and Application
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Design and evaluate a new micro-machining based approach for fabricating dissolvable microneedle arrays (MNAs) with diverse geometries and from different materials for dry delivery to skin microenvironments. The aims are to describe the new fabrication method, to evaluate geometric and material capability as well as reproducibility of the method, and to demonstrate the effectiveness of fabricated MNAs in delivering bioactive molecules.
Precise master molds were created using micromilling. Micromolding was used to create elastomer production molds from master molds. The dissolvable MNAs were then fabricated using the spin-casting method. Fabricated MNAs with different geometries were evaluated for reproducibility. MNAs from different materials were fabricated to show material capability. MNAs with embedded bioactive components were tested for functionality on human and mice skin.
MNAs with different geometries and from carboxymethyl cellulose, polyvinyl pyrrolidone and maltodextrin were created reproducibly using our method. MNAs successfully pierce the skin, precisely deliver their bioactive cargo to skin and induce specific immunity in mice.
We demonstrated that the new fabrication approach enables creating dissolvable MNAs with diverse geometries and from different materials reproducibly. We also demonstrated the application of MNAs for precise and specific delivery of biomolecules to skin microenvironments in vitro and in vivo.
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- Dissolvable Microneedle Arrays for Intradermal Delivery of Biologics: Fabrication and Application
Volume 31, Issue 1 , pp 117-135
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- Print ISSN
- Online ISSN
- Springer US
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- cutaneous drug delivery
- dissolvable microneedle arrays
- Industry Sectors
- Author Affiliations
- 1. Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, 15213, USA
- 2. Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, 15213, USA
- 3. Department of Dermatology; Department of Bioengineering Pittsburgh Clinical and Translational Science Institute, The McGowan Institute for Regenerative Medicine and the University of Pittsburgh Cancer Institute University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, 15213, USA
- 5. Departments of Mechanical Engineering, Biomedical Engineering, and Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, 15213, USA