Quantitative assessment of transcriptome differences between brain territories.
Transcriptome analysis of mammalian brain structures is a potentially powerful approach in addressing the diversity of cerebral functions. Here, we used a microassay for serial analysis of gene expression (SAGE) to generate quantitative mRNA expression profiles of normal adult mouse striatum, nucleus accumbens, and somatosensory cortex. Comparison of these profiles revealed 135 transcripts heterogeneously distributed in the brain. Among them, a majority (78), although matching a registered sequence, are novel regional markers. To improve the anatomical resolution of our analysis, we performed in situ hybridization and observed unique expression patterns in discrete brain regions for a number of candidates. We assessed the distribution of the new markers in peripheral tissues using quantitative RT-PCR, Northern hybridization, and published SAGE data. In most cases, expression was higher in the brain than in peripheral tissues. Because the markers were selected according to their expression level, without reference to prior knowledge, our studies provide an unbiased, comprehensive molecular signature for various mammalian brain structures that can be used to investigate their plasticity under a variety of circumstances.
de Chaldée
Michel
M
Service de Biochimie et de Génétique Moléculaire, Département de Biologie Joliot-Curie, Commissariat à l'Energie Atomique (CEA) Saclay, 91191 Gif-sur-Yvette Cedex, France.
Gaillard
Marie-Claude
MC
Bizat
Nicolas
N
Buhler
Jean-Marie
JM
Manzoni
Olivier
O
Bockaert
Joël
J
Hantraye
Philippe
P
Brouillet
Emmanuel
E
Elalouf
Jean-Marc
JM
D000818:Animals; D015415:Biomarkers; D001921:Brain / Q000033:anatomy & histology* / Q000378:metabolism*; D001923:Brain Chemistry / Q000235:genetics*; D001931:Brain Mapping / Q000379:methods*; D003342:Corpus Striatum / Q000033:anatomy & histology / Q000737:chemistry / Q000378:metabolism; D020869:Gene Expression Profiling; D005796:Genes / Q000235:genetics; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D009714:Nucleus Accumbens / Q000033:anatomy & histology / Q000737:chemistry / Q000378:metabolism; D020543:Proteome / Q000235:genetics; D012333:RNA, Messenger / Q000096:biosynthesis; D013003:Somatosensory Cortex / Q000033:anatomy & histology / Q000737:chemistry / Q000378:metabolism; D014158:Transcription, Genetic / Q000235:genetics*
D015415:Biomarkers; D020543:Proteome; D012333:RNA, Messenger