Evidence map›Paper›PMID 35987207›Full record

ArticleNeuron2022

Enhanced excitability of the hippocampal CA2 region and its contribution to seizure activity in a mouse model of temporal lobe epilepsy.

Alexander C Whitebirch, John J LaFrancois, Swati Jain, Paige Leary, Bina Santoro, Steven A Siegelbaum, Helen E Scharfman

Open access · greenAbstract read
In one paragraph

Article in Neuron, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers.

0numbers the graph read from it
0cells of the map it votes in
50citing papers in PubMed
6.7field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

50 citing papers in PubMed, 74 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. When dreams feel real: the MÖBIUS model.Communications biology · 2026
    Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Primary age-related tauopathy.Acta neuropathologica · 2025
    Review
  19. Review
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors at 4 institutions in 1 country.

Alexander C WhitebirchDepartments of Neuroscience and Pharmacology, Kavli Institute for Brain Science, Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University Irving Medical Center, New York, NY 10027, USA.
John J LaFrancoisThe Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY 10962, USA.
Swati JainThe Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY 10962, USA.
Paige LearyDepartment of Neuroscience and Physiology, New York University Langone Health, New York, NY 10016, USA.
Bina SantoroDepartments of Neuroscience and Pharmacology, Kavli Institute for Brain Science, Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University Irving Medical Center, New York, NY 10027, USA.
Steven A SiegelbaumDepartments of Neuroscience and Pharmacology, Kavli Institute for Brain Science, Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University Irving Medical Center, New York, NY 10027, USA. Electronic address: sas8@columbia.edu.
Helen E ScharfmanDepartment of Child Psychiatry, New York University Langone Health, New York, NY 10016, USA; Department of Neuroscience and Physiology, New York University Langone Health, New York, NY 10016, USA; Department of Psychiatry, New York University Langone Health, New York, NY 10016, USA; The Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY 10962, USA. Electronic address: helen.scharfman@nki.rfmh.org.
Allen Institute for Brain Science · USNathan Kline Institute for Psychiatric Research · USNYU Langone Health · USColumbia University · US

Funding

The Role of Hippocampal area CA2 in EpilepsyR01NS106983 · NINDS · NATHAN S. KLINE INSTITUTE FOR PSYCH RES · PI Helen E Scharfman · 2018 to 2026
$4.9M
Evaluating CA2 Neurons as Novel Targets in EpilepsyR21NS093991 · NINDS · COLUMBIA UNIVERSITY HEALTH SCIENCES · PI SCHARFMAN, HELEN E, SIEGELBAUM, STEVEN A · 2015 to 2016
$457k
The role of CA2 circuits in temporal lobe epilepsyF31NS113466 · NINDS · COLUMBIA UNIVERSITY HEALTH SCIENCES · PI WHITEBIRCH, ALEXANDER CRAIG · 2019 to 2020
$91k
NINDS NIH HHS F31 NS113466NINDS NIH HHS R01 NS106983NINDS NIH HHS R21 NS093991
6 · The paper itself

Abstract

The hippocampal CA2 region, an area important for social memory, has been suspected to play a role in temporal lobe epilepsy (TLE) because of its resistance to degeneration observed in neighboring CA1 and CA3 regions in both humans and rodent models of TLE. However, little is known about whether alterations in CA2 properties promote seizure generation or propagation. Here, we addressed the role of CA2 using the pilocarpine-induced status epilepticus model of TLE. Ex vivo electrophysiological recordings from acute hippocampal slices revealed a set of coordinated changes that enhance CA2 PC intrinsic excitability, reduce CA2 inhibitory input, and increase CA2 excitatory output to its major CA1 synaptic target. Moreover, selective chemogenetic silencing of CA2 pyramidal cells caused a significant decrease in the frequency of spontaneous seizures measured in vivo. These findings provide the first evidence that CA2 actively contributes to TLE seizure activity and may thus be a promising therapeutic target.

Indexed as

Epilepsy, Temporal LobeAnimalsCA2 Region, HippocampalDisease Models, AnimalHippocampusHumansMicePilocarpinePyramidal CellsSeizuresPilocarpineCA2designer receptors activated by designer drugselectroencephalogramepilepsyhippocampushyperexcitabilityinhibitory-excitatory balanceoptogeneticsslice electrophysiologystatus epilepticus

Identifiers

PMID35987207
PMCPMC9547935
OpenAlexW4293276493

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.