This is a detailed protocol explaining how to perform extracellular axon stimulations as described in Städele and Stein, 2016. The ability to stimulate and record action potentials is essential to electrophysiological examinations of neuronal function. Extracellular stimulation of axons traveling in fiber bundles (nerves) is a classical technique in brain research and a fundamental tool in neurophysiology (Abbas and Miller, 2004; Barry, 2015; Basser and Roth, 2000; Cogan, 2008). It allows for activating action potentials in individual or multiple axons, controlling their firing frequency, provides information about the speed of neuronal communication, and neuron health and function.
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http://dx.doi.org/10.21769/BioProtoc.2151 | DOI Listing |
Matrix Biol Plus
February 2025
Department of Biomedical Engineering, University of Cincinnati, Cincinnati, OH 45221, USA.
Schwann cells (SCs) hold key roles in axonal function and maintenance in the peripheral nervous system (PNS) and are a critical component to the regeneration process following trauma. Following PNS trauma, SCs respond to both physical and chemical signals to modify phenotype and assist in the regeneration of damaged axons and extracellular matrix (ECM). There is currently a lack of knowledge regarding the SC response to dynamic, temporal changes in the ECM brought on by swelling and the development of scar tissue as part of the body's wound-healing process.
View Article and Find Full Text PDFInt J Mol Sci
January 2025
Department of Neuroregeneration, Netherlands Institute for Neuroscience, Royal Netherlands Academy of Arts and Sciences, Meibergdreef 47, 1105 BA Amsterdam, The Netherlands.
Semaphorin 3A (Sema3A) is an axon guidance molecule, which is also abundant in the adult central nervous system (CNS), particularly in perineuronal nets (PNNs). PNNs are extracellular matrix structures that restrict plasticity. The cellular sources of Sema3A in PNNs are unknown.
View Article and Find Full Text PDFACS Nano
January 2025
Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing 210000 Jiangsu, China.
Engineered extracellular vesicles play an increasingly important role in the treatment of spinal cord injury. In order to prepare more effective engineered extracellular vesicles, we biologically modified M2 microglia. Angiopep-2 (Ang2) is an oligopeptide that can target the blood-brain barrier.
View Article and Find Full Text PDFFront Cell Dev Biol
January 2025
Key Laboratory of Tropical Translational Medicine and Ministry of Education, Hainan Academy of Medical Sciences, Hainan Medical University, Haikou, China.
Axon guidance is a key event in neural circuit development that drives the correct targeting of axons to their targets through long distances and unique patterns. Exosomes, extracellular vesicles that are smaller than 100 nm, are secreted by most cell types in the brain. Regulation of cell-cell communication, neuroregeneration, and synapse formation by exosomes have been extensively studied.
View Article and Find Full Text PDFACS Nano
January 2025
Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China.
Exogenous neural stem cells (NSCs) have great potential to reconstitute damage spinal neural circuitry. However, regulating the metabolic reprogramming of NSCs for reliable nerve regeneration has been challenging. This report discusses the biomimetic dextral hydrogel (DH) with right-handed nanofibers that specifically reprograms the lipid metabolism of NSCs, promoting their neural differentiation and rapid regeneration of damaged axons.
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