ArticleThe Journal of neuroscience : the official journal of the Society for Neuroscience2022
Differential Activity-Dependent Increase in Synaptic Inhibition and Parvalbumin Interneuron Recruitment in Dentate Granule Cells and Semilunar Granule Cells.
Article in The Journal of neuroscience : the official journal of the Society for Neuroscience, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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17 citing papers in PubMed, 21 citations in OpenAlex.
- Targeted interneuron ablation in an mTORopathy model: Testing a two-hit mechanism of epileptogenesis.Progress in neurobiology · 2026Article
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- Fear extinction induces maladaptive generalization via noradrenergic and GABAergic systems.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Altered Physiology and Ensemble Recruitment of Dentate Gyrus Semilunar Granule Cells in a Mouse Model of Epilepsy.bioRxiv : the preprint server for biology · 2026Article
- Perisomatic innervation on the semilunar granule cells and outer molecular layer granule cells of the dentate gyrus of the mouse.Frontiers in neuroanatomy · 2026Article
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- Dysregulation of neuropilin-2 expression in inhibitory neurons impairs hippocampal circuit development and enhances risk for autism-related behaviors and seizures.Molecular psychiatry · 2025Article
- Differential Glutamatergic Inputs to Semilunar Granule Cells and Granule Cells Underscore Dentate Gyrus Projection Neuron Diversity.bioRxiv : the preprint server for biology · 2025Article
- Dysregulation of Neuropilin-2 Expression in Inhibitory Neurons Impairs Hippocampal Circuit Development and Enhances Risk for Autism-Related Behaviors and Seizures.bioRxiv : the preprint server for biology · 2024Article
- Genetic labeling of embryonically-born dentate granule neurons in young mice using the PenkScientific reports · 2024Article
- Dysregulation of Neuropilin-2 Expression in Inhibitory Neurons Impairs Hippocampal Circuit Development Leading to Autism-Epilepsy Phenotype.Research square · 2024Article
- Reclusive chandeliers: Functional isolation of dentate axo-axonic cells after experimental status epilepticus.Progress in neurobiology · 2023Article
- Early deficits in dentate circuit and behavioral pattern separation after concussive brain injury.Experimental neurology · 2023Article
- RECLUSIVE CHANDELIERS: FUNCTIONAL ISOLATION OF DENTATE AXO-AXONIC CELLS AFTER EXPERIMENTAL STATUS EPILEPTICUS.bioRxiv : the preprint server for biology · 2023Article
- Brain IGF-I regulates LTP, spatial memory, and sexual dimorphic behavior.Life science alliance · 2023Article
- Commissural dentate granule cell projections and their rapid formation in the adult brain.PNAS nexus · 2023Article
- Long-Term Effects of Moderate Concussive Brain Injury During Adolescence on Synaptic and Tonic GABA Currents in Dentate Granule Cells and Semilunar Granule Cells.Frontiers in neuroscience · 2022Article
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5 authors at 2 institutions in 1 country.
Funding
Abstract
Strong inhibitory synaptic gating of dentate gyrus granule cells (GCs), attributed largely to fast-spiking parvalbumin interneurons (PV-INs), is essential to maintain sparse network activity needed for dentate dependent behaviors. However, the contribution of PV-INs to basal and input-driven sustained synaptic inhibition in GCs and semilunar granule cells (SGCs), a sparse morphologically distinct dentate projection neuron subtype, is currently unknown. In studies conducted in hippocampal slices from mice, we find that although basal IPSCs are more frequent in SGCs and optical activation of PV-INs reliably elicited IPSCs in both GCs and SGCs, optical suppression of PV-INs failed to reduce IPSC frequency in either cell type. Amplitude and kinetics of IPSCs evoked by perforant path (PP) activation were not different between GCs and SGCs. However, the robust increase in sustained polysynaptic IPSCs elicited by paired afferent stimulation was lower in SGCs than in simultaneously recorded GCs. Optical suppression of PV-IN selectively reduced sustained IPSCs in SGCs but not in GCs. These results demonstrate that PV-INs, while contributing minimally to basal synaptic inhibition in both GCs and SGCs in slices, mediate sustained feedback inhibition selectively in SGCs. The temporally selective blunting of activity-driven sustained inhibitory gating of SGCs could support their preferential and persistent recruitment during behavioral tasks.
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