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J. Biol. Chem., Vol. 277, Issue 9, 6888-6897, March 1, 2002
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From the The receptor for advanced glycation end products
(RAGE), a member of the immunoglobulin superfamily, is known to
interact with amphoterin. This interaction has been proposed to play a role in neurite outgrowth and process elongation during
neurodifferentiation. However, there is as yet no direct evidence of
the relevance of this pathway to neurodifferentiation under
physiological conditions. In this study we have investigated a possible
role of RAGE and amphoterin in the retinoic acid-induced
differentiation of neuroblastoma cells. The functional inactivation of
RAGE by dominant negative and antisense strategies showed that RAGE is
not required for process outgrowth or differentiation, although
overexpression of RAGE accelerates the elongation of neuritic
processes. Using the antisense strategy, amphoterin was shown to be
essential for process outgrowth and differentiation, suggesting that
amphoterin may interact with other molecules to exert its effect in
this context. Interestingly, the survival of the neuroblastoma cells treated with retinoic acid was partly dependent on the expression of
RAGE, and inhibition of RAGE function partially blocked the increase in
anti-apoptotic protein Bcl-2 following retinoic acid treatment. Based
on these results we propose that a combination therapy using RAGE
blockers and retinoic acid may prove as a useful approach for
chemotherapy for the treatment of neuroblastoma.
Receptor for Advanced Glycation End Products Plays a More
Important Role in Cellular Survival than in Neurite Outgrowth during
Retinoic Acid-induced Differentiation of Neuroblastoma
Cells*
,
¶
Department of Neuroimmunological Cell
Biology, Interdisziplinäres Zentrum für Klinische
Forschung, University of Leipzig, Leipzig 04103, Germany and the
§ Programme of Molecular Neurobiology, Institute of
Biotechnology, and the Department of Biosciences, University of
Helsinki, Helsinki FIN-00014, Finland
*
This work was supported by the Bundesministerium für
Bildung, Forschung und Technologie, Interdisziplinäres Zentrum
für Klinische Forschung (IZKF), at the University of Leipzig
(01KS9504, Project N1) and by the Alexander von Humboldt Foundation (to
G. S.).The costs of publication of this
article were defrayed in part by the
payment of page charges. The article
must therefore be hereby marked
"advertisement" in
accordance with 18 U.S.C. Section
1734 solely to indicate this fact.
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