RGD Reference Report - Identification of a mammalian homologue of the fungal Tom70 mitochondrial precursor protein import receptor as a thyroid hormone-regulated gene in specific brain regions. - Rat Genome Database
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Identification of a mammalian homologue of the fungal Tom70 mitochondrial precursor protein import receptor as a thyroid hormone-regulated gene in specific brain regions.

Authors: Alvarez-Dolado, M  Gonzalez-Moreno, M  Valencia, A  Zenke, M  Bernal, J  Munoz, A 
Citation: Alvarez-Dolado M, etal., J Neurochem. 1999 Dec;73(6):2240-9.
RGD ID: 11522362
Pubmed: (View Article at PubMed) PMID:10582581

Thyroid hormone is an important regulator of mammalian brain maturation. By differential display PCR, we isolated a cDNA clone (S2) that is specifically up-regulated in the striatum of neonatal hypothyroid rats. S2 was identified as KIAA0719, the first human gene distantly homologous to the fungal Tom70, which encodes a member of the translocase mitochondrial outer membrane complex involved in the import of preproteins into the mitochondria. By northern and in situ hybridization studies, KIAA0719 was found to be up-regulated in the striatum, nucleus accumbens, and discrete cortical layers of 15-day-old hypothyroid rats. In contrast, lower expression was found in the olfactory tubercle, whereas no differences were detected in other brain regions. Significantly, treatment of hypothyroid animals with single injections of thyroxine restored the normal levels of KIAA0719 expression. Moreover, treatment of control animals with thyroxine led to a reduced expression, demonstrating a negative hormonal regulation in vivo. Thus, KIAA0719 gene expression is regulated by thyroid hormone in the neonatal rat brain in a region-specific fashion. Given the role of the homologous Tom70 gene, the alteration of KIAA0719 expression may contribute to the changes in mitochondrial morphology and physiology caused by hypothyroidism in the developing rat brain.

Annotation

Disease Annotations    
hypothyroidism  (IEP,ISO)

Gene Ontology Annotations    

Biological Process

Objects Annotated

Genes (Rattus norvegicus)
Tomm70  (translocase of outer mitochondrial membrane 70)

Genes (Mus musculus)
Tomm70a  (translocase of outer mitochondrial membrane 70A)

Genes (Homo sapiens)
TOMM70  (translocase of outer mitochondrial membrane 70)


Additional Information