Needleless administration of advanced therapies into the skin via the appendages using a hypobaric patch

Advanced therapies are commonly administered via injection even when they act within the skin tissue, and this increases the chances of off-target effects. Here we report the use of a skin patch containing a hypobaric chamber that induces skin dome formation to enable needleless delivery of advanced...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences - PNAS 2022-05, Vol.119 (18), p.e2120340119-e2120340119
Main Authors: Benaouda, Faiza, Inacio, Ricardo, Lim, Chui Hua, Park, Haeeun, Pitcher, Thomas, Alhnan, Mohamed A, Aly, Mazen M S, Al-Jamal, Khuloud T, Chan, Ka-Lung, Gala, Rikhav P, Sebastia-Saez, Daniel, Cui, Liang, Chen, Tao, Keeble, Julie, Jones, Stuart A
Format: Article
Language:English
Subjects:
Administration, Cutaneous
Animals
Antigens
Appendages
Biological Sciences
Chambers
Diclofenac
Finite element method
Histology
IgG antibody
Immunoglobulin G
Infrared imaging
Injection
Mice
Needles
Nonsteroidal anti-inflammatory drugs
Rats
Skin
Skin - metabolism
Skin Absorption
Swine
Vaccines
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Summary:Advanced therapies are commonly administered via injection even when they act within the skin tissue, and this increases the chances of off-target effects. Here we report the use of a skin patch containing a hypobaric chamber that induces skin dome formation to enable needleless delivery of advanced therapies directly into porcine, rat, and mouse skin. Finite element method modeling showed that the hypobaric chamber in the patch opened the skin appendages by 32%, thinned the skin, and compressed the appendage wall epithelia. These changes allowed direct delivery of an H1N1 vaccine antigen and a diclofenac nanotherapeutic into the skin. Fluorescence imaging and infrared mapping of the skin showed needleless delivery via the appendages. The in vivo utility of the patch was demonstrated by a superior immunoglobulin G response to the vaccine antigen in mice compared to intramuscular injection and a 70% reduction in rat paw swelling in vivo over 5 h with diclofenac without skin histology changes.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.2120340119