Target-Specific Expression of Presynaptic NMDA Receptors in Neocortical Microcircuits

Katherine A. Buchanan, Arne V. Blackman, Alexandre W. Moreau, Dale Elgar, Rui P. Costa, Txomin Lalanne, Adam A. Tudor Jones, Julia Oyrer, P.Jesper Sjostrom

Research output: Contribution to journalArticlepeer-review


Traditionally, NMDA receptors are located postsynaptically; yet, putatively presynaptic NMDA receptors (preNMDARs) have been reported. Although
implicated in controlling synaptic plasticity, their function is not well understood and their expression patterns are debated. We demonstrate that, in layer 5
of developing mouse visual cortex, preNMDARs specifically control synaptic transmission at pyramidal cell inputs to other pyramidal cells and to Martinotti
cells, while leaving those to basket cells unaffected. We also reveal a type of interneuron that mediates ascending inhibition. In agreement with synapse-specific expression, we find preNMDAR-mediated calcium signals in a subset of pyramidal cell terminals. A tuned network model predicts that preNMDARs specifically reroute information flow in local circuits during high-frequency firing, in particular by impacting frequency-dependent disynaptic inhibition mediated by Martinotti cells, a finding that we experimentally verify. We conclude that postsynaptic cell type determines presynaptic terminal molecular identity and that preNMDARs govern information processing in neocortical columns.
Original languageEnglish
Pages (from-to)451-466
Issue number3
Publication statusPublished - 1 Aug 2012


  • #dtc-s0958979


Dive into the research topics of 'Target-Specific Expression of Presynaptic NMDA Receptors in Neocortical Microcircuits'. Together they form a unique fingerprint.

Cite this