Marco Capogna

Ivy cells: a population of nitric-oxide-producing, slow-spiking GABAergic neurons and their involvement in hippocampal network activity

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • Pablo Fuentealba, MRC Anatomical Neuropharmacology Unit, Department of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3TH, UK. Electronic address:
  • ,
  • Rahima Begum
  • ,
  • Marco Capogna
  • Shozo Jinno
  • ,
  • László F Márton
  • ,
  • Jozsef Csicsvari
  • ,
  • Alex Thomson
  • ,
  • Peter Somogyi
  • ,
  • Thomas Klausberger

In the cerebral cortex, GABAergic interneurons are often regarded as fast-spiking cells. We have identified a type of slow-spiking interneuron that offers distinct contributions to network activity. "Ivy" cells, named after their dense and fine axons innervating mostly basal and oblique pyramidal cell dendrites, are more numerous than the parvalbumin-expressing basket, bistratified, or axo-axonic cells. Ivy cells express nitric oxide synthase, neuropeptide Y, and high levels of GABA(A) receptor alpha1 subunit; they discharge at a low frequency with wide spikes in vivo, yet are distinctively phase-locked to behaviorally relevant network rhythms including theta, gamma, and ripple oscillations. Paired recordings in vitro showed that Ivy cells receive depressing EPSPs from pyramidal cells, which in turn receive slowly rising and decaying inhibitory input from Ivy cells. In contrast to fast-spiking interneurons operating with millisecond precision, the highly abundant Ivy cells express presynaptically acting neuromodulators and regulate the excitability of pyramidal cell dendrites through slowly rising and decaying GABAergic inputs.

Original languageEnglish
Pages (from-to)917-29
Number of pages13
Publication statusPublished - 27 Mar 2008

    Research areas

  • Action Potentials/physiology, Animals, Animals, Newborn, Behavior, Animal, Biotin/analogs & derivatives, Cerebral Cortex/cytology, Electric Stimulation/methods, Hippocampus/cytology, Male, Microscopy, Immunoelectron/methods, Nerve Net/physiology, Nerve Tissue Proteins/metabolism, Neurons/classification, Nitric Oxide/metabolism, Parvalbumins/metabolism, Patch-Clamp Techniques/methods, Rats, Rats, Sprague-Dawley, Receptors, GABA-A/metabolism, Synaptic Transmission/physiology, gamma-Aminobutyric Acid/metabolism

See relations at Aarhus University Citationformats

ID: 141155873