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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Schachner, Melitta Dang, Jiyoung Schnaar, Ronald L. Fromholt, Susan E. Vyas, Alka A. Patel, Himatkumar V. Heffer-lauc, Marija Vyas, Kavita A. |
| Description | Author Affiliation: Vyas AA ( Departments of Pharmacology and Neuroscience, The Johns Hopkins School of Medicine, Baltimore, MD 21205, USA.); |
| Abstract | Myelin-associated glycoprotein (MAG) binds to the nerve cell surface and inhibits nerve regeneration. The nerve cell surface ligand(s) for MAG are not established, although sialic acid-bearing glycans have been implicated. We identify the nerve cell surface gangliosides GD1a and GT1b as specific functional ligands for MAG-mediated inhibition of neurite outgrowth from primary rat cerebellar granule neurons. MAG-mediated neurite outgrowth inhibition is attenuated by (i) neuraminidase treatment of the neurons; (ii) blocking neuronal ganglioside biosynthesis; (iii) genetically modifying the terminal structures of nerve cell surface gangliosides; and (iv) adding highly specific IgG-class antiganglioside mAbs. Furthermore, neurite outgrowth inhibition is mimicked by highly multivalent clustering of GD1a or GT1b by using precomplexed antiganglioside Abs. These data implicate the nerve cell surface gangliosides GD1a and GT1b as functional MAG ligands and suggest that the first step in MAG inhibition is multivalent ganglioside clustering. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 12 |
| Volume Number | 99 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2002-06-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Gangliosides Physiology Myelin-Associated Glycoprotein Nerve Regeneration Neurites Animals Antibodies, Monoclonal Pharmacology CHO Cells Cricetinae Biosynthesis Immunology Glycosphingolipids Metabolism Ligands Drug Effects Ultrastructure Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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