Reference - Detail
| RRC ID | 82497 |
|---|---|
| Author | Zhou S, Chino Y, Kasama T, Miyake R, Mitsuzawa S, Luan Y, Ahmad NB, Hibino H, Takai M. |
| Title | Biocompatible Core-Shell Microneedle Sensor Filled with Zwitterionic Polymer Hydrogel for Rapid Continuous Transdermal Monitoring. |
| Journal | ACS Nano |
| Abstract |
Microneedle (MN)-based electrochemical biosensors hold promising potential for noninvasive continuous monitoring of interstitial fluid biomarkers. However, challenges, such as instability and biofouling, exist. This study proposes a design employing hollow MN to encapsulate a zwitterionic polymer hydrogel sensing layer with excellent biocompatibility and antifouling properties to address these issues. MN shell isolates the internal microporous sensing layer from subcutaneous friction, and the hydrogel filling leverages the MNs' three-dimensional structures, enabling high-dense loading of biorecognition elements. The hollow MNs are successfully fabricated from high-molecular-weight polylactic acid via drawing lithography, exhibiting sufficient strength for effective epidermis penetration. Additionally, a high-performance gold nanoconductive layer is successfully deposited inside the MN hollow channel, establishing a stable electrical connection between the polymer MN and the hydrogel sensing layer. To support the design, numerical simulations of position-based diffusive analyte solutes reveal fast-responsive electrochemical signals attributed to the high diffusion coefficient of the hydrogel and the concentrated structure of the hollow channel encapsulation. Experimental results and numerical simulations underscore the advantages of this design, showcasing rapid response, high sensitivity, long-term stability, and excellent antifouling properties. Fabricated MN sensors exhibited biosafety, feasibility, and effectiveness, with accurate and rapid in vivo glucose monitoring ability. This study emphasizes the significance of rational design, structural utilization, and micro-nanofabrication to unlock the untapped potential of MN biosensors. |
| Volume | 18(39) |
| Pages | 26541-26559 |
| Published | 2024-10-1 |
| DOI | 10.1021/acsnano.4c02997 |
| PMID | 39297515 |
| PMC | PMC11447902 |
| MeSH | Animals Biocompatible Materials* / chemistry Biosensing Techniques* Hydrogels* / chemistry Mice Needles* Polyesters / chemistry Polymers / chemistry Skin / metabolism |
| IF | 14.588 |
| Altmetric score |
オルトメトリクス指標項目
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| The most frequently cited source | X(Twitter) |
| Total number of mentions | 7 |
| Altmetric score changes over past 6months | 0.0 |
| Resource | |
| Human and Animal Cells | L929 |