Abstract
Slit proteins are a family of secreted guidance proteins that can repel neuronal migration and axon growth via interaction with their cellular roundabout receptors (Robos). Here it was shown that Slit2–Robo-1 interactions were enhanced by cell-surface heparan sulfate. Removal of heparan sulfate decreased the affinity of Slit for Robo by about threefold. In addition, removal of cell-surface heparan sulfate by heparinase III abolished the chemorepulsive response to Slit2 normally shown by both the migrating neurons and growing axons. These results indicate essential roles for cell-surface heparan sulfate in the repulsive activities of Slit2.
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Acknowledgements
Thanks to J. Y. Wu and Y. Rao for rat Robo-1 expression plasmid, M. Tessier-Lavigne for Slit2 expression plasmid, V. Lemmon for anti-L1 antibody, V. Lemmon, B. Wible and B. Wang for discussions during this project, D. Kunze and V. Lemmon for reading the manuscript and M. Pendergast for help with the confocal microscope. Supported by the National Institutes of Health grant NS38877.
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Hu, H. Cell-surface heparan sulfate is involved in the repulsive guidance activities of Slit2 protein. Nat Neurosci 4, 695–701 (2001). https://doi.org/10.1038/89482
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DOI: https://doi.org/10.1038/89482
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