Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Opn7b is a non-visual G protein-coupled receptor expressed in zebrafish. Here we find that Opn7b expressed in HEK cells constitutively activates the G pathway and illumination with blue/green light inactivates G protein-coupled inwardly rectifying potassium channels. This suggests that light acts as an inverse agonist for Opn7b and can be used as an optogenetic tool to inhibit neuronal networks in the dark and interrupt constitutive inhibition in the light. Consistent with this prediction, illumination of recombinant expressed Opn7b in cortical pyramidal cells results in increased neuronal activity. In awake mice, light stimulation of Opn7b expressed in pyramidal cells of somatosensory cortex reliably induces generalized epileptiform activity within a short (<10 s) delay after onset of stimulation. Our study demonstrates a reversed mechanism for G protein-coupled receptor control and Opn7b as a tool for controlling neural circuit properties.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8302595 | PMC |
| http://dx.doi.org/10.1038/s41467-021-24718-0 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Layer 6 corticothalamic neurons induce high gamma oscillations through cortico-cortical and cortico-thalamo-cortical pathways.
J Neurosci
September 2025
Wallace H Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, USA.
Layer 6 corticothalamic (L6CT) neurons project to both cortex and thalamus, inducing multiple effects including the modulation of cortical and thalamic firing, and the emergence of high gamma oscillations in the cortical local field potential (LFP). We hypothesize that the high gamma oscillations driven by L6CT neuron activation reflect the dynamic engagement of intracortical and cortico-thalamo-cortical circuits. To test this, we optogenetically activated L6CT neurons in NTSR1-cre mice (both male and female) expressing channelrhodopsin-2 in L6CT neurons.
View Article and Find Full Text PDFCortical versus hippocampal network dysfunction in a human brain assembloid model of epilepsy and intellectual disability.
Cell Rep
September 2025
Department of Neurology, University of California, Los Angeles, David Geffen School of Medicine, Los Angeles, CA 90095, USA; Department of Neurobiology, University of California, Los Angeles, Los Angeles, CA 90095, USA; Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Un
Neurodevelopmental disorders often impair multiple cognitive domains. For instance, a genetic epilepsy syndrome might cause seizures due to cortical hyperexcitability and present with memory impairments arising from hippocampal dysfunction. This study examines how a single disorder differentially affects distinct brain regions using induced pluripotent stem cell (iPSC)-derived cortical- and hippocampal-ganglionic eminence assembloids to model developmental and epileptic encephalopathy 13, a condition arising from gain-of-function mutations in the SCN8A gene encoding the sodium channel Nav1.
View Article and Find Full Text PDFLong-Term Open-Label Study Evaluating Oral Miglustat Treatment in Patients With Neuronal Ceroid Lipofuscinosis Type 3.
Neurology
October 2025
Neurology, Epilepsy and Movement Disorders Unit, Bambino Gesù Children's Hospital, IRCCS, Full Member of European Reference Network on Rare and Complex Epilepsies - EpiCARE, Rome, Italy.
Objectives: Neuronal ceroid lipofuscinosis type 3 (CLN3) is a rare lysosomal storage disorder characterized by progressive neurodegeneration. No disease-modifying treatments are currently available. Miglustat, a substrate reduction therapy, has shown preclinical efficacy in CLN3 models (conference abstract).
View Article and Find Full Text PDFMicroRNA-mediated regulation of proliferation, lineage differentiation, and apoptosis in neural stem cells.
RNA Biol
September 2025
Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul, Republic of Korea.
Neural stem cells (NSCs) are multipotent stem cells with self-renewal capacity, able to differentiate into all neural lineages of the central nervous system, including neurons, oligodendrocytes, and astrocytes; thus, their proliferation and differentiation are essential for embryonic neurodevelopment and adult brain homoeostasis. Dysregulation in these processes is implicated in neurological disorders, highlighting the need to elucidate how NSCs proliferate and differentiate to clarify the mechanisms of neurogenesis and uncover potential therapeutic targets. MicroRNAs (miRNAs) are small, post-transcriptional regulators of gene expression involved in many aspects of nervous system development and function.
View Article and Find Full Text PDFExcitatory glycine receptors control ventral hippocampus synaptic plasticity and anxiety-related behaviors.
Proc Natl Acad Sci U S A
September 2025
Institut de Biologie de l'Ecole Normale Supérieure, Ecole Normale Supérieure, Université Paris Sciences et Lettres, Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, Paris 75005, France.
Excitatory glycine receptors (eGlyRs), composed of the glycine-binding NMDA receptor subunits GluN1 and GluN3A, have recently emerged as a novel neuronal signaling modality that challenges the traditional view of glycine as an inhibitory neurotransmitter. Unlike conventional GluN1/GluN2 NMDARs, the distribution and role of eGlyRs remain poorly understood. Here, we show that eGlyRs are highly enriched in the ventral hippocampus (VH) and confer distinct properties on this brain region.
View Article and Find Full Text PDF