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2001 (English)In: Molecular and Cellular Neuroscience, ISSN 1044-7431, E-ISSN 1095-9327, Vol. 18, no 3, p. 283-295Article in journal (Refereed) Published
Abstract [en]
Signals regulating diversification of olfactory sensory neurons to express odorant receptors and other genes necessary for correct assembly of the olfactory sensory map persist in the olfactory epithelium of adult mouse. We have screened for genes with an expression pattern correlating with the topography odorant receptor-expression zones. The Msx1 homeobox gene and a semaphorin receptor (Neuropilin-2) showed graded expression patterns in the olfactory epithelium. The gradients of Msx1 and Neuropilin-2 expression in basal cells and neurons, respectively, correlated with expression of a retinoic acid-synthesizing enzyme (RALDH2) in lamina propria. A BMP-type I receptor (Alk6) showed a reverse gradient of expression in the supporting cells of the epithelium. Considering known functions of identified genes in cell specification and axon guidance this suggests that zonal division of the olfactory sensory map is maintained, during continuous neurogenesis, as a consequence of topographic counter gradients of positional information.
Place, publisher, year, edition, pages
Academic Press, 2001
National Category
Cell and Molecular Biology
Identifiers
urn:nbn:se:umu:diva-5321 (URN)10.1006/mcne.2001.1019 (DOI)000171705700004 ()11591129 (PubMedID)2-s2.0-0034754081 (Scopus ID)
2006-09-192006-09-192023-03-24Bibliographically approved