TY - JOUR
T1 - Injectable 2D flexible hydrogel sheets for optoelectrical/biochemical dual stimulation of neurons
AU - Amagat, Jordi
AU - Müller, Christoph Alexander
AU - Jensen, Bjarke Nørrehvedde
AU - Xiong, Xuya
AU - Su, Yingchun
AU - Christensen, Natasja Porskjær
AU - Le Friec, Alice
AU - Dong, Mingdong
AU - Fang, Ying
AU - Chen, Menglin
N1 - Copyright © 2023 The Author(s). Published by Elsevier B.V. All rights reserved.
PY - 2023/3
Y1 - 2023/3
N2 - Major challenges in developing implanted neural stimulation devices are the invasiveness, complexity, and cost of the implantation procedure. Here, we report an injectable, nanofibrous 2D flexible hydrogel sheet-based neural stimulation device that can be non-invasively implanted via syringe injection for optoelectrical and biochemical dual stimulation of neuron. Specifically, methacrylated gelatin (GelMA)/alginate hydrogel nanofibers were mechanically reinforced with a poly(lactide-co-ε-caprolactone) (PLCL) core by coaxial electrospinning. The lubricant hydrogel shell enabled not only injectability, but also facile incorporation of functional nanomaterials and bioactives. The nanofibers loaded with photocatatlytic g-C
3N
4/GO nanoparticles were capable of stimulating neural cells via blue light, with a significant 36.3 % enhancement in neurite extension. Meanwhile, the nerve growth factor (NGF) loaded nanofibers supported a sustained release of NGF with well-maintained function to biochemically stimulate neural differentiation. We have demonstrated the capability of an injectable, hydrogel nanofibrous, neural stimulation system to support neural stimulation both optoelectrically and biochemically, which represents crucial early steps in a larger effort to create a minimally invasive system for neural stimulation.
AB - Major challenges in developing implanted neural stimulation devices are the invasiveness, complexity, and cost of the implantation procedure. Here, we report an injectable, nanofibrous 2D flexible hydrogel sheet-based neural stimulation device that can be non-invasively implanted via syringe injection for optoelectrical and biochemical dual stimulation of neuron. Specifically, methacrylated gelatin (GelMA)/alginate hydrogel nanofibers were mechanically reinforced with a poly(lactide-co-ε-caprolactone) (PLCL) core by coaxial electrospinning. The lubricant hydrogel shell enabled not only injectability, but also facile incorporation of functional nanomaterials and bioactives. The nanofibers loaded with photocatatlytic g-C
3N
4/GO nanoparticles were capable of stimulating neural cells via blue light, with a significant 36.3 % enhancement in neurite extension. Meanwhile, the nerve growth factor (NGF) loaded nanofibers supported a sustained release of NGF with well-maintained function to biochemically stimulate neural differentiation. We have demonstrated the capability of an injectable, hydrogel nanofibrous, neural stimulation system to support neural stimulation both optoelectrically and biochemically, which represents crucial early steps in a larger effort to create a minimally invasive system for neural stimulation.
KW - Core-shell fibers
KW - Electrospinning
KW - Growth factor release
KW - Neural regeneration
KW - Optoelectrical stimulation
U2 - 10.1016/j.bioadv.2023.213284
DO - 10.1016/j.bioadv.2023.213284
M3 - Journal article
C2 - 36682202
SN - 2772-9508
VL - 146
JO - Biomaterials advances
JF - Biomaterials advances
M1 - 213284
ER -