Calcium is an important messenger in the neuronal system, but its specific role in axonal regeneration has not been fully investigated. To clarify it, we constructed a noninvasive calcium-imaging model of zebrafish Mauthner cells and monitored subcellular calcium dynamics during axonal regeneration. Using the calcium indicator GCamp6f, we observed that the regenerative length correlated with the peak amplitude of the evoked calcium response before axotomy, which suggested that the evoked calcium response might serve as a useful indicator of evoked neuronal activity and axonal regenerative capacity. To investigate this possibility, we overexpressed an inward rectifying potassium channel protein, Kir2.1a, to decrease the Mauthner neuronal activity and found that the inhibition of the calcium response correlated with decreased axonal regeneration. In contrast, treatment of pentylenetetrazol and knockout of the sodium voltage-gated channel α subunit 1 gene increased the calcium response and thus enhanced axonal regeneration. Our results therefore increased the understanding of the correlation between the neural activity and the vertebrate axonal regeneration.-Chen, M., Huang, R.-C., Yang, L.-Q., Ren, D.-L., Hu, B. imaging of evoked calcium responses indicates the intrinsic axonal regenerative capacity of zebrafish.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1096/fj.201802649R | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Nuclear calcium signaling in D1 receptor-expressing neurons of the nucleus accumbens regulates molecular, cellular and behavioral adaptations to cocaine.
Biol Psychiatry
January 2025
Institute of Biology Paris-Seine, laboratory Neuroscience Paris-Seine, CNRS, INSERM, Sorbonne Université, UPMC Université Paris 06 F-75005, Paris, France. Electronic address:
Background: The persistence of cocaine-evoked adaptations relies on gene regulations within the reward circuit, especially in the ventral striatum (i.e., nucleus accumbens (NAc)).
View Article and Find Full Text PDFSpatio-temporal segregation between sensory relay and swallowing pre-motor population activities by optical imaging in the rat nucleus of the solitary tract.
Pflugers Arch
January 2025
Division of Neurophysiology, Department of Physiology, Hyogo Medical University, Hyogo, 663 8501, Japan.
The nucleus tractus solitarius (NTS) contains neurons that relay sensory swallowing commands information from the oropharyngeal cavity and swallowing premotor neurons of the dorsal swallowing group (DSG). However, the spatio-temporal dynamics of the interplay between the sensory relay and the DSG is not well understood. Here, we employed fluorescence imaging after microinjection of the calcium indicator into the NTS in an arterially perfused brainstem preparation of rat (n = 8) to investigate neuronal population activity in the NTS in response to superior laryngeal nerve (SLN) stimulation.
View Article and Find Full Text PDFOptimized genetic tools for neuroanatomical and functional mapping of the Aedes aegypti olfactory system.
G3 (Bethesda)
January 2025
W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins Malaria Research Institute, Johns Hopkins Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA.
The mosquito Aedes aegypti is an emerging model insect for invertebrate neurobiology. We detail the application of a dual transgenesis marker system that reports the nature of transgene integration with circular donor template for CRISPR-Cas9-mediated homology-directed repair at target mosquito chemoreceptor genes. Employing this approach, we demonstrate the establishment of cell-type-specific T2A-QF2 driver lines for the A.
View Article and Find Full Text PDFOnonin's Antagonistic Activity towards TRPV1: Insights from Molecular Dynamics and Capsaicin-Evoked Calcium Response in DRG Neurons.
Curr Med Chem
January 2025
Department of Anatomy and Histology, School of Medicine, The University of Jordan, 11942, Amman, Jordan.
Background: The search for effective painkillers has led to intensive research, with a particular focus on the transient receptor potential vanilloid-1 (TRPV1) channel as a possible target.
Methods: One promising candidate is ononin, which is investigated for its binding with TRPV1 through a 200-ns molecular dynamic simulation and analysed via root-meansquare deviation (RMSD), root-mean-square fluctuation (RMSF), hydrogen-bond interactions, radius of gyration (RadGyr), and MM-PBSA energy calculations. The results were further validated experimentally via calcium imaging studies.
The antioxidant property of CAPE depends on TRPV1 channel activation in microvascular endothelial cells.
Redox Biol
January 2025
Laboratory for Research in Functional Nutrition, Instituto de Nutrición y Tecnología de los Alimentos, Universidad de Chile, Av. El Líbano 5524, Macul, Santiago, 7830490, Chile. Electronic address:
Caffeic acid phenethyl ester (CAPE) is a hydrophobic phytochemical typically found in propolis that acts as an antioxidant, anti-inflammatory and cardiovascular protector, among several other properties. However, the molecular entity responsible for recognising CAPE is unknown, and whether that molecular interaction is involved in developing an antioxidant response in the target cells remains an unanswered question. Herein, we hypothesized that a subfamily of TRP ion channels works as the molecular entity that recognizes CAPE at the plasma membrane and allows a fast shift in the antioxidant capacity of intact endothelial cells (EC).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!