Unique regulation of immediate early gene and tyrosine hydroxylase expression in the odor-deprived mouse olfactory bulb. 1999

N Liu, and E Cigola, and C Tinti, and B K Jin, and B Conti, and B T Volpe, and H Baker
Laboratory of Molecular Neurobiology, Cornell University Medical College at The Burke Medical Research Institute, White Plains, New York 10605, USA.

Tyrosine hydroxylase (TH), expressed in a population of periglomerular neurons intrinsic to the olfactory bulb, displays dramatic down-regulation in response to odor deprivation. To begin to elucidate the importance of immediate early genes (IEG) in TH gene regulation, the present study examined expression of IEGs in the olfactory bulb in response to odor deprivation. In addition, the composition of TH AP-1 and CRE binding complexes was investigated in control and odor-deprived mice. Immunocytochemical studies showed that c-Fos, Fos-B, Jun-D, CRE-binding protein (CREB), and phosphorylated CREB (pCREB) are colocalized with TH in the dopaminergic periglomerular neurons. Unilateral naris closure resulted in down-regulation of c-Fos and Fos-B, but not Jun-D, CREB, or pCREB, in the glomerular layer of the ipsilateral olfactory bulb. Gel shift assays demonstrated a significant decrease (32%) in TH AP-1, but not CRE, binding activity in the odor-deprived bulb. Fos-B was found to be the exclusive member of the Fos family present in the TH AP-1 complex. CREB, CRE modulator protein (CREM), Fos-B, and Jun-D, but not c-Fos, all contributed to the CRE DNA-protein complex. These results indicated that Fos-B, acting through both AP-1 and CRE motifs, may be implicated in the regulation of TH expression in the olfactory bulb dopaminergic neurons.

UI MeSH Term Description Entries
D009474 Neurons The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM. Nerve Cells,Cell, Nerve,Cells, Nerve,Nerve Cell,Neuron
D009812 Odorants The volatile portions of chemical substances perceptible by the sense of smell. Odors,Aroma,Fragrance,Scents,Aromas,Fragrances,Odor,Odorant,Scent
D009830 Olfactory Bulb Ovoid body resting on the CRIBRIFORM PLATE of the ethmoid bone where the OLFACTORY NERVE terminates. The olfactory bulb contains several types of nerve cells including the mitral cells, on whose DENDRITES the olfactory nerve synapses, forming the olfactory glomeruli. The accessory olfactory bulb, which receives the projection from the VOMERONASAL ORGAN via the vomeronasal nerve, is also included here. Accessory Olfactory Bulb,Olfactory Tract,Bulbus Olfactorius,Lateral Olfactory Tract,Main Olfactory Bulb,Olfactory Glomerulus,Accessory Olfactory Bulbs,Bulb, Accessory Olfactory,Bulb, Main Olfactory,Bulb, Olfactory,Bulbs, Accessory Olfactory,Bulbs, Main Olfactory,Bulbs, Olfactory,Glomerulus, Olfactory,Lateral Olfactory Tracts,Main Olfactory Bulbs,Olfactorius, Bulbus,Olfactory Bulb, Accessory,Olfactory Bulb, Main,Olfactory Bulbs,Olfactory Bulbs, Accessory,Olfactory Bulbs, Main,Olfactory Tract, Lateral,Olfactory Tracts,Olfactory Tracts, Lateral,Tract, Lateral Olfactory,Tract, Olfactory,Tracts, Lateral Olfactory,Tracts, Olfactory
D005786 Gene Expression Regulation Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control (induction or repression) of gene action at the level of transcription or translation. Gene Action Regulation,Regulation of Gene Expression,Expression Regulation, Gene,Regulation, Gene Action,Regulation, Gene Expression
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000918 Antibody Specificity The property of antibodies which enables them to react with some ANTIGENIC DETERMINANTS and not with others. Specificity is dependent on chemical composition, physical forces, and molecular structure at the binding site. Antibody Specificities,Specificities, Antibody,Specificity, Antibody
D014446 Tyrosine 3-Monooxygenase An enzyme that catalyzes the conversion of L-tyrosine, tetrahydrobiopterin, and oxygen to 3,4-dihydroxy-L-phenylalanine, dihydrobiopterin, and water. EC 1.14.16.2. Tyrosine Hydroxylase,3-Monooxygenase, Tyrosine,Hydroxylase, Tyrosine,Tyrosine 3 Monooxygenase
D015153 Blotting, Western Identification of proteins or peptides that have been electrophoretically separated by blot transferring from the electrophoresis gel to strips of nitrocellulose paper, followed by labeling with antibody probes. Immunoblotting, Western,Western Blotting,Western Immunoblotting,Blot, Western,Immunoblot, Western,Western Blot,Western Immunoblot,Blots, Western,Blottings, Western,Immunoblots, Western,Immunoblottings, Western,Western Blots,Western Blottings,Western Immunoblots,Western Immunoblottings
D015536 Down-Regulation A negative regulatory effect on physiological processes at the molecular, cellular, or systemic level. At the molecular level, the major regulatory sites include membrane receptors, genes (GENE EXPRESSION REGULATION), mRNAs (RNA, MESSENGER), and proteins. Receptor Down-Regulation,Down-Regulation (Physiology),Downregulation,Down Regulation,Down-Regulation, Receptor
D016755 Proto-Oncogene Proteins c-jun Cellular DNA-binding proteins encoded by the c-jun genes (GENES, JUN). They are involved in growth-related transcriptional control. There appear to be three distinct functions: dimerization (with c-fos), DNA-binding, and transcriptional activation. Oncogenic transformation can take place by constitutive expression of c-jun. c-fos-Associated Protein p39,c-jun Proteins,fos-Associated Protein p39,jun B Proteins,jun D Proteins,jun Proto-Oncogene Proteins,p39(c-jun),Proto-Oncogene Products c-jun,Proto-Oncogene Proteins jun,jun Proto-Oncogene Product p39,p39 c-jun,Proto Oncogene Products c jun,Proto Oncogene Proteins c jun,Proto Oncogene Proteins jun,c fos Associated Protein p39,c jun Proteins,fos Associated Protein p39,jun Proto Oncogene Product p39,jun Proto Oncogene Proteins,p39 c jun

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