Active tissue adhesive activates mechanosensors and prevents muscle atrophy

While mechanical stimulation is known to regulate a wide range of biological processes at the cellular and tissue levels, its medical use for tissue regeneration and rehabilitation has been limited by the availability of suitable devices. Here we present a mechanically active gel–elastomer–nitinol t...

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Bibliographic Details
Published in:Nature materials 2023-02, Vol.22 (2), p.249-259
Main Authors: Nam, Sungmin, Seo, Bo Ri, Najibi, Alexander J., McNamara, Stephanie L., Mooney, David J.
Format: Article
Language:English
Subjects:
639/166/985
639/301/1005/1006
639/301/923/1027
Actuation
Actuators
Adhesives
Atrophy
Biological activity
Biomaterials
Chemistry and Materials Science
Condensed Matter Physics
Elastomers
Humans
Materials Science
Muscle Contraction
Muscle, Skeletal - metabolism
Muscle, Skeletal - pathology
Muscles
Muscular Atrophy - metabolism
Muscular Atrophy - pathology
Muscular Atrophy - prevention & control
Nanotechnology
Nickel titanides
Optical and Electronic Materials
Prevention
Protein synthesis
Proteins
Regeneration (physiology)
Rehabilitation
Rosaniline Dyes - metabolism
Shape memory alloys
Stimulation
Tissue Adhesives - metabolism
Tissue engineering
Tissues
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Summary:While mechanical stimulation is known to regulate a wide range of biological processes at the cellular and tissue levels, its medical use for tissue regeneration and rehabilitation has been limited by the availability of suitable devices. Here we present a mechanically active gel–elastomer–nitinol tissue adhesive (MAGENTA) that generates and delivers muscle-contraction-mimicking stimulation to a target tissue with programmed strength and frequency. MAGENTA consists of a shape memory alloy spring that enables actuation up to 40% strain, and an adhesive that efficiently transmits the actuation to the underlying tissue. MAGENTA activates mechanosensing pathways involving yes-associated protein and myocardin-related transcription factor A, and increases the rate of muscle protein synthesis. Disuse muscles treated with MAGENTA exhibit greater size and weight, and generate higher forces compared to untreated muscles, demonstrating the prevention of atrophy. MAGENTA thus has promising applications in the treatment of muscle atrophy and regenerative medicine. An implantable tissue adhesive soft actuator adheres to muscle, generating mechanical stimulation, and activates mechanosensing pathways for prevention of atrophy in disuse muscles.
ISSN:1476-1122
1476-4660
DOI:10.1038/s41563-022-01396-x