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Multicargo Porous Cochlear Electrode Coating for Antifibrosis After Cochlear Implantation
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Multicargo Porous Cochlear Electrode Coating for Antifibrosis After Cochlear Implantation
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Journal Article
Multicargo Porous Cochlear Electrode Coating for Antifibrosis After Cochlear Implantation
2025
Overview
Severe to profound sensorineural hearing loss seriously affects the communication and cognitive ability of the patients. Cochlear implantation (CI) is currently the most effective treatment, while it may damage the remaining inner ear function due to its poor biocompatibility and the resultant fibrosis. Herein, a porous methacrylated poly(dimethylsiloxane) (MA‐PDMS)‐coated cochlear electrode is presented for CI and hearing protection. The porous MA‐PDMS is filled with a hybrid hydrogel system made of dexamethasone sodium phosphate (Dex), Ti3C2Tx MXene (MXene), and methacrylate gelatin (GelMA). The coating shows good biocompatibility and drug loading and release capacity in vitro, protective effects on hair cells (HCs) and spiral ganglion neurons (SGNs) of the inner ear, as well as the residual hearing protection and the effective fibrosis reduction in vivo. It is anticipated that this porous electrode drug‐loading coating may provide a valuable reference strategy for the future cochlear electrode transplantation system. This study presents a novel porous drug‐loading coating for cochlear electrodes, utilizing MA‐PDMS infused with GelMA hydrogel containing dexamethasone and MXene nanoparticles. The coating enhances biocompatibility, enables sustained drug release, reduces fibrosis, and preserves residual hearing post‐CI. This approach offers a promising strategy for improving cochlear electrode design and clinical outcomes.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
Subject
/ Coated Materials, Biocompatible
/ Cochlea
/ Cochlear Implantation - adverse effects
/ Cochlear Implantation - methods
/ Cochlear Implants - adverse effects
/ Dexamethasone - analogs & derivatives
/ Dexamethasone - pharmacology
/ Dimethylpolysiloxanes - chemistry
/ Fibrosis - prevention & control
/ Hearing Loss, Sensorineural - surgery
/ hydrogel
/ Porosity
