OCAM: A New Member of the Neural Cell Adhesion Molecule Family Related to Zone-to-Zone Projection of Olfactory and Vomeronasal Axons
Zone-to-zone projection of olfactory and vomeronasal sensory axons underlies the topographic and functional mapping of chemoreceptor expression zones of the sensory epithelia onto zonally arranged glomeruli in the main and accessory olfactory bulbs. Here we identified OCAM (R4B12 antigen), an axonal...
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Veröffentlicht in: | The Journal of neuroscience 1997-08, Vol.17 (15), p.5830-5842 |
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creator | Yoshihara, Yoshihiro Kawasaki, Miwa Tamada, Atsushi Fujita, Hiroko Hayashi, Hideyuki Kagamiyama, Hiroyuki Mori, Kensaku |
description | Zone-to-zone projection of olfactory and vomeronasal sensory axons underlies the topographic and functional mapping of chemoreceptor expression zones of the sensory epithelia onto zonally arranged glomeruli in the main and accessory olfactory bulbs. Here we identified OCAM (R4B12 antigen), an axonal surface glycoprotein expressed by subsets of both olfactory and vomeronasal axons in a zone-specific manner. OCAM is a novel homophilic adhesion molecule belonging to the immunoglobulin superfamily with striking structural homology to neural cell adhesion molecule. In both the main and accessory olfactory systems, OCAM mRNA is expressed by sensory neurons in restricted chemoreceptor expression zones, and OCAM protein-expressing axons project to the glomeruli in the corresponding zones of the main and accessory bulbs. OCAM protein is expressed on subsets of growing sensory axons in explant cultures even in the absence of the target bulb. These results demonstrate a precisely coordinated zonal expression of chemoreceptors and OCAM and suggest that OCAM may play important roles in selective fasciculation and zone-to-zone projection of the primary olfactory axons. |
doi_str_mv | 10.1523/jneurosci.17-15-05830.1997 |
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subjects | Amino Acid Sequence Animals Axons - physiology Blotting, Northern Blotting, Western Cloning, Molecular Mice Molecular Sequence Data Neural Cell Adhesion Molecules - metabolism Olfactory Pathways - metabolism Vomeronasal Organ - metabolism |
title | OCAM: A New Member of the Neural Cell Adhesion Molecule Family Related to Zone-to-Zone Projection of Olfactory and Vomeronasal Axons |
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