In Situ Magnetoelectric Generation of miRNA Sponges and Wireless Electric Stimulus by Conductive Granular Scaffolds for Nerve Regeneration
Journal
Advanced Materials
Journal Volume
37
Journal Issue
32
Start Page
2500650
ISSN
9359648
Date Issued
2025
Author(s)
Pan, Wan-Chi
Lin, Ya-Hui
Iao, Hoi Man
Chang, Yun-Hsuan
Chen, Yin-Hsu
Liu, Hsiu-Ching
Tran, Ngoc-Tri
Lee, I-Chi
Lien, Hui-Wen
Hwang, Eric
Hu, Shang-Hsiu
Abstract
Electronic signaling and microRNA (miRNA) regulation play pivotal roles in determining neuronal cell fate and promoting brain recovery. Despite this, clinical advancements are hindered by the limited availability of tools for spatiotemporal electrical signaling and non-viral gene modulation in neurons in vivo. In this study, a conductive granular scaffold (cGRAS) that doubles as an antenna and neuronal gene delivery agent for targeted miRNA regulation of nerve repair in traumatic brain injury (TBI) is developed. The inherent features of granular scaffolds reduce the inflammation and glial scarring in TBI by mitigating activated microglia and stellate cells. Upon irradiation with an external alternating magnetic field (AMF), the ?�electromagnetic messenger??induces electrical stimulation to restore brain function and promotes temporal electroporation. This process, together with mechanotransduction capability of cGRAS, enhances the delivery and formation of miRNA sponges both in vitro and in vivo, thereby reducing the overexpression of miR6263, which is significantly upregulated upon neuronal injury. In the whole brain imaging analysis, suppression of inflammation, angiogenesis around the TBI cavity, and infiltration of newborn neurons in the injured area are observed after in situ magnetoelectric formation of miRNA sponges and wireless electric stimulus, leading to improved brain function and behavioral recovery. Overall, this cGRAS represents a potentially innovative and versatile tool for clinical neuronal regeneration engineering. © 2025 Wiley-VCH GmbH.
Subjects
electrical stimulus
gene delivery
granular scaffolds
nerve regeneration
wireless charging
Publisher
John Wiley and Sons Inc
Type
journal article