Vitamin E reduces antidepressant-related beta-adrenoceptor down-regulation in cultured cells. Comparable effects on St. John's wort and tricyclic antidepressant treatment

De Marchis, Gian Marco; Bürgi, Sibylle; Kientsch, Urs; Honegger, Ulrich E (2006). Vitamin E reduces antidepressant-related beta-adrenoceptor down-regulation in cultured cells. Comparable effects on St. John's wort and tricyclic antidepressant treatment. Planta medica, 72(15), pp. 1436-7. Stuttgart: Thieme 10.1055/s-2006-951727

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The mode of action of antidepressants is still a matter of debate. Acute inhibition of neurotransmitter reuptake in central neuronal synapses, followed by a down-regulation of central postsynaptic beta-adrenoceptor (beta-AR) numbers were consistently observed in vivo, while a reduction in surface beta-AR density was found in cell cultures. Effects of the tricyclic antidepressant desipramine (DMI) were abolished by vitamin E (alpha-TOC) in vitro as well as in vivo. Alpha-TOC interfered with antidepressant-induced changes of cellular plasma membrane properties and with recycling of beta-AR. St. John's wort (SJW) extract reduced beta-AR numbers in cultured cells to a similar extent as DMI or the selective serotonin re-uptake inhibitor fluoxetine. We chronically co-exposed cell cultures to SJW extract and to alpha-TOC. Receptor down-regulation following exposure to the plant extract was inhibited in the presence of alpha-TOC suggesting a mode of action of SJW extract comparable to that of synthetic antidepressants. Inhibition of cell proliferation by the plant extract was also significantly reduced by alpha-TOC.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology 04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Pharmacology
UniBE Contributor:	De Marchis, Gian Marco, Honegger, Ulrich
ISSN:	0032-0943
ISBN:	17109256
Publisher:	Thieme
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:45
Last Modified:	05 Dec 2022 14:14
Publisher DOI:	10.1055/s-2006-951727
PubMed ID:	17109256
Web of Science ID:	000243285400018
URI:	https://boris.unibe.ch/id/eprint/18771 (FactScience: 1009)