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Contents: Volume 16, Release 3; 13 February 2004
[Index by Author]
[Cover Caption]
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= article is free immediately upon publication
(all articles are free one year after publication)
Cover: Gene discovery and the characterization of tissues based on microarray gene expression database mining and profiling. Top: portion of a Pearson correlation hierarchical tree clustering of genes and tissues using 269 "olfactorome" genes, so called based on their high relative expression in olfactory mucosa samples versus 81 different mouse tissue samples. Tissues and genes that share similar expression profiles are grouped on the same parent of their hierarchical tree branch. Each row represents a gene and each column a mouse tissue sample. Red indicates high expression, blue indicates low expression. Bottom: in vivo localization of highly expressed genes in the olfactory mucosa using in situ hybridization and immunohistochemical localization. In situ hybridization (left) demonstrates olfactory mucosa localization of Plunc mRNA, the gene with the highest relative expression in olfactory mucosa compared to all other tissues in the expression database (signal appears as punctate bright white foci). Enzyme activity measurements and immunohistochemical localization (right) confirmed high expression of Spgl1 (encoding sphingosine phosphate lyase), which had not been localized in olfactory mucosa previously. Strong staining is present within mature olfactory sensory neurons (red peri-nuclear reaction product). For further discussion, see article by Genter MB, Van Veldhoven PP, Jegga AG, Sakthivel B, Kong S, Stanley K, Witte DP, Ebert CL, and Aronow BJ. Microarray-based discovery of highly expressed olfactory mucosal genes: potential roles in the various functions of the olfactory system. Physiol Genomics 16: 67-81, 2003. First published October 21, 2003; 10.1152/physiolgenomics.00117.2003.
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