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Glial contributions to excitatory neurotransmission in cultured hippocampal cells

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Abstract

ALTHOUGH many glial cells possess neurotransmitter receptors and transporters1–5, little is known about glial participation in neurotransmission. To explore this issue, we recorded neuronal autaptic6,7 and glial responses from cultured hippocampal single-neuron micro-islands6,7. Excitatory synaptic events activate rapid electrogenic glial glutamate transporter currents similar to those elicited by exogenous glutamate in other preparations. We show here that glial transporter responses may be used to sense changes in presynaptic efficacy and that glial uptake helps to remove syn-aptically released glutamate, thereby contributing to the termination of excitatory synaptic currents under certain conditions. These observations provide a framework for understanding the role of glia in both normal and pathological processes.

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Authors and Affiliations

  1. Departments of Psychiatry, Anatomy & Neurobiology, and Program in Neuroscience, Washington University School of Medicine, St Louis, Missouri, 63110, USA

    Steven Mennerick & Charles F. Zorumski

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  1. Steven Mennerick
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  2. Charles F. Zorumski
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Mennerick, S., Zorumski, C. Glial contributions to excitatory neurotransmission in cultured hippocampal cells. Nature 368, 59–62 (1994). https://doi.org/10.1038/368059a0

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  • DOI: https://doi.org/10.1038/368059a0

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