Abstract
The human neuroblastoma cell line CHP212 was found to express functional high affinity neurotensin (NTS-1) receptor subtype. Based on the functional interactions between neurotensin and dopamine transmission, we have used this cell line to investigate the short- and long-term modulation of tyrosine hydroxylase gene expression by the stable neurotensin agonist JMV 449. After exposure of the cells to 1 μM JMV 449 for 5 or 72 h, tyrosine hydroxylase protein and mRNA levels were significantly increased as detected by western blot analysis and quantitative RT-PCR, respectively. Transfection of CHP212 cells with a plasmid containing the luciferase reporter gene under the control of a limited proximal region of the cloned tyrosine hydroxylase promoter, revealed that the effect of JMV 449 results from an increase in the transcriptional activity of the TH gene. These results indicate that modulation of tyrosine hydroxylase gene expression may constitute one of the mechanisms involved in the control of dopamine transmission by neurotensin. Such neurotensin-mediated changes in tyrosine hydroxylase expression may also participate in multiple adaptation processes within the central nervous system to environmental conditions where neurotensin is released such as stress and food intake.
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Najimi, M., Hermans, E., Rostène, W. et al. Transcriptional Regulation of the Tyrosine Hydroxylase Gene by Neurotensin in Human Neuroblastoma CHP212 Cells. Metab Brain Dis 16, 165–174 (2001). https://doi.org/10.1023/A:1012588927052
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DOI: https://doi.org/10.1023/A:1012588927052