Increased expression of tyrosine hydroxylase and anomalous neurites in catecholaminergic neurons of ATF-2 null mice

Masayo Kojima, Takahiro Suzuki, Toshio Maekawa, Shunsuke Ishii, Chiho Sumi-Ichinose, Takahide Nomura, Hiroshi Ichinose

Research output: Contribution to journalArticle

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Abstract

ATF-2/CRE-BP1 was originally identified as a cAMP-responsive element (CRE) binding protein abundant in the brain. We previously reported that phosphorylation of ATF-2 increased the expression of tyrosine hydroxylase (TH), which is the rate-limiting enzyme for catecholamine biosynthesis, directly acting on the CRE in the promoter region of the TH gene in PC12D cells (Suzuki et al. [2002] J. Biol. Chem. 277:40768-40774). To examine the role of ATF-2 on transcriptional control of the TH gene in the brain, we investigated the TH expression in ATF-2-/- mice. We found that TH expression was greatly increased in medulla oblongata and locus ceruleus of the ATF-2-deficient embryos. Ectopic expression of TH was observed in the raphe magnus nucleus, where serotonergic neural cell bodies are located. Interestingly, A10 dorsal neurons were lost in the embryos of ATF-2-/- mice. There was no difference in the TH immunoreactivity in the olfactory bulb. The data showed that alteration in TH expression by absence of ATF-2 gradually declined from caudal to rostral part of the brain. We also found anomalous neurite extension in catecholaminergic neurons of ATF-2 null mice, i.e., increased dendritic arborization and shortened axons. These data suggest that ATF-2 plays critical roles for proper expression of the TH gene and for neurite extension of catecholaminergic neurons, possibly through a repressor-like action.

Original languageEnglish
Pages (from-to)544-552
Number of pages9
JournalJournal of Neuroscience Research
Volume86
Issue number3
DOIs
Publication statusPublished - 15-02-2008

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Tyrosine 3-Monooxygenase
Neurites
Neurons
Brain
Embryonic Structures
Genes
Medulla Oblongata
Neuronal Plasticity
Locus Coeruleus
Olfactory Bulb
antineoplaston A10
Genetic Promoter Regions
Catecholamines
Axons
Carrier Proteins
Phosphorylation
Enzymes

All Science Journal Classification (ASJC) codes

  • Cellular and Molecular Neuroscience

Cite this

Kojima, Masayo ; Suzuki, Takahiro ; Maekawa, Toshio ; Ishii, Shunsuke ; Sumi-Ichinose, Chiho ; Nomura, Takahide ; Ichinose, Hiroshi. / Increased expression of tyrosine hydroxylase and anomalous neurites in catecholaminergic neurons of ATF-2 null mice. In: Journal of Neuroscience Research. 2008 ; Vol. 86, No. 3. pp. 544-552.
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Increased expression of tyrosine hydroxylase and anomalous neurites in catecholaminergic neurons of ATF-2 null mice. / Kojima, Masayo; Suzuki, Takahiro; Maekawa, Toshio; Ishii, Shunsuke; Sumi-Ichinose, Chiho; Nomura, Takahide; Ichinose, Hiroshi.

In: Journal of Neuroscience Research, Vol. 86, No. 3, 15.02.2008, p. 544-552.

Research output: Contribution to journalArticle

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T1 - Increased expression of tyrosine hydroxylase and anomalous neurites in catecholaminergic neurons of ATF-2 null mice

AU - Kojima, Masayo

AU - Suzuki, Takahiro

AU - Maekawa, Toshio

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AU - Sumi-Ichinose, Chiho

AU - Nomura, Takahide

AU - Ichinose, Hiroshi

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