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Mechanosensory signalling in C. elegans mediated by the GLR-1 glutamate receptor

An Erratum to this article was published on 22 February 1996


NEURONAL signalling across synapses involves activation of many neurotransmitter receptors on postsynaptic cells, glr-1 encodes a potential glutamate receptor in the nematode Caenorhabditis elegans which is most similar to vertebrate AMPA-type ionotropic glutamate receptors1, glr-1 is expressed in motor neurons and inter-neurons, including interneurons implicated in the control of locomotion2. Here we investigate the contribution of glr-1 to the normal signalling of these neurons, by generating a deletion mutation in glr-1. We find that mutant worms are deficient in their ability to withdraw backwards when mechanically stimulated, but they withdraw normally in response to chemical repellents. The ASH sensory neurons mediate withdrawal responses both to mechanical stimuli and to chemical repellents3,4, and ASH makes chemical synapses with glr-1-expressing interneurons. Our results suggest that postsynaptic interneurons use different neurotransmitter receptors to process two sensory stimuli detected by one sensory neuron.

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Maricq, A., Peckol, E., Driscoll, M. et al. Mechanosensory signalling in C. elegans mediated by the GLR-1 glutamate receptor. Nature 378, 78–81 (1995).

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