Abstract
SYNAPTIC membranes express cell adhesion molecules1. Here we investigate the role of the neural cell adhesion molecules L1 and NCAM in hippocampal long-term potentiation (LTP), a sustained-use-dependent increase in synaptic efficacy that has been impli-cated in learning and memory2. L1 and NCAM mediate cell inter-actions during neural development3 and are strongly expressed in the hippocampus4,5. They cooperate to strengthen L1-dependent cell adhesion6–9 and are coupled to second messenger pathways10–12. We show that LTP in CA1 neurons of rat hippo-campal slices was reduced by application of various L1 and NCAM antibodies, recombinant LI fragments, and upon dissociation of the L1/NCAM complex through oligomannosidic carbohydrates and NCAM peptides. Neither the activation of NMDA (N-methyl-D-aspartate) receptors nor the maintenance of LTP was affected. These results suggest that L1 and NCAM modulate the develop-ment or the stabilization of LTP13.
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Lüthi, A., Laurent, JP., Figurovt, A. et al. Hippocampal long-term potentiation and neural cell adhesion molecules L1 and NCAM. Nature 372, 777–779 (1994). https://doi.org/10.1038/372777a0
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DOI: https://doi.org/10.1038/372777a0
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