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Damage to the Brain Serotonergic System Increases the Expression of Liver Cytochrome P450

Rysz, Marta and Bromek, Ewa and Haduch, Anna and Sadakierska-Chudy, Anna and Daniel, Władysława A.. (2015) Damage to the Brain Serotonergic System Increases the Expression of Liver Cytochrome P450. Drug Metabolism and Disposition, 43 (9). pp. 1345-1352.

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Official URL: https://edoc.unibas.ch/82367/

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Abstract

Genes coding for cytochrome P450 are regulated by endogenous hormones such as the growth hormone, corticosteroids, thyroid, and sex hormones. Secretion of these hormones is regulated by the respective hypothalamus-pituitary-secretory organ axes. Since the brain sends its serotonergic projections from the raphe nuclei to the hypothalamus, we have assumed that damage to these nuclei may affect the neuroendocrine regulation of cytochrome P450 expression in the liver. Thereby, 5,7-dihydroxytryptamine (5,7-DHT), a serotonergic neurotoxin, was injected into the dorsal and median raphe nuclei of male Wistar rats. Ten days after the neurotoxin injections, the brain concentrations of neurotransmitters, serum hormone, and cytokine levels, as well as the expression of cytochrome P450 in the liver were measured. Injection of 5,7-DHT decreased serotonin concentration in the brain followed by a significant rise in the levels of the growth hormone, corticosterone, and testosterone, and a drop in triiodothyronine concentration in the serum. No changes in interleukin (IL) levels (IL-2 and IL-6) were observed. Simultaneously, the activity and protein level of liver CYP1A, CYP3A1, and CYP2C11 rose (the activity of CYP2A/2B/2C6/2D was not significantly changed). Similarly, the mRNA levels of CYP1A1, CYP1A2, CYP2C11, and CYP3A1 were elevated. This is the first report demonstrating the effect of intracerebral administration of serotonergic neurotoxin on liver cytochrome P450. The obtained results indicate involvement of the brain serotonergic system in the neuroendocrine regulation of liver cytochrome P450 expression. The physiologic and pharmacological significance of the findings is discussed.
Faculties and Departments:05 Faculty of Science > Departement Pharmazeutische Wissenschaften > Pharmazie > Biopharmazie (Meyer zu Schwabedissen)
UniBasel Contributors:Rysz, Marta Anna
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Society for Pharmacology and Experimental Therapeutics
ISSN:0090-9556
e-ISSN:1521-009X
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:23 Mar 2021 12:12
Deposited On:23 Mar 2021 12:12

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