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Tetrahydrocarbazoles decrease elevated SOCE in medium spiny neurons from transgenic YAC128 mice, a model of Huntington's disease

Czeredys, Magdalena, Maciag, Filip, Methner, Axel, Kuznicki, Jacek
Biochemical and biophysical research communications 2017 v.483 pp. 1194-1205
calcium, endoplasmic reticulum, extracellular space, genes, genetically modified organisms, homeostasis, membrane potential, mice, mitochondrial membrane, models, neurodegenerative diseases, neurons
Huntington's disease (HD) is a hereditary neurodegenerative disease caused by a polyglutamine expansion within the huntingtin (HTT) gene. One of the cellular functions that is dysregulated in HD is store-operated calcium entry (SOCE), a process in which the depletion of Ca2+ from the endoplasmic reticulum (ER) induces Ca2+ influx from the extracellular space. We detected an enhanced activity of SOC channels in medium spiny neurons (MSNs) from YAC128 mice, a transgenic model of HD, and investigated whether this could be reverted by tetrahydrocarbazoles. The compound 6-bromo-N-(2-phenylethyl)-2,3,4,9-tetrahydro-1H-carbazol-1-amine hydrochloride was indeed able to restore the disturbed Ca2+ homeostasis and stabilize SOCE in YAC128 MSN cultures. We also detected a beneficial effect of this compound on the mitochondrial membrane potential. Since dysregulated Ca2+ homeostasis is believed to be one of the pathological hallmarks of HD, this compound might be a lead structure for HD treatment.