Mitochondrial estrogen receptors as a vulnerability factor of chronic stress and mediator of fluoxetine treatment in female and male rat hippocampus
Abstract
Depression is a disease of an abnormal brain energy metabolism also marked with increased apoptosis in specific brain regions. Mounting evidence indicates that the mitochondrial oxidative phosphorylation and apoptosis are novel targets for the actions of estrogen receptors (ERs). In this study, we examined the effects of antidepressant (AD) fluoxetine (FLU) treatment on the mitochondria] ER alpha (ER alpha), ER beta (total and phospho-pER(beta) and their association with cytochrome c (cyt oxidase activity and apoptotic Bcl2/Bax-molecules in the hippocampal mitochondria of chronically isolated (CPSI) female and male rats depicting depression. Impaired behaviour induced by CPSI was followed by decreased corticosterone (CORT) in both sexes and downregulation of cyt c oxidase in males. CPSI did not affect the ERa in either of sexes, but it decreased mitochondrial ER beta and increased pER beta in both sexes. Stress-reduced ER beta is associated with a decrease in mitochondrial energetic pr...ocesses in males and with apoptotic mechanisms in females. FLU normalized behaviour in both sexes and increased cyt c oxidase in females. FLU elevated ERa in males, increased ER beta and decreased pERB in both sexes. The AD-induced alterations of ER beta paralleled with bioenergetics and pro-survival pathways in females. In conclusion, sex-unspecific regulation of ER beta by the stress and by AD and its differential convergence with bioenergetics and apoptotic pathways in females and males implies its role as a vulnerability factor in the stress response and emphasizes mitochondrial ER beta-dependent pathways as an important gateway of ADs action, at least in females. (C) 2017 Elsevier B.V. All rights reserved.
Keywords:
Fluoxetine / Chronic stress / Estrogen receptors / Sex / mitochondria / HippocampusSource:
Brain Research, 2017, 1671, 77-84Funding / projects:
- Defining a cluster of molecular biomarkers for improved diagnostics and therapy of mood disorders (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-41029)
DOI: 10.1016/j.brainres.2017.07.007
ISSN: 0006-8993; 1872-6240
PubMed: 28716632
WoS: 000409287200009
Scopus: 2-s2.0-85024387904
Institution/Community
VinčaTY - JOUR AU - Adžić, Miroslav AU - Mitić, Miloš AU - Radoičić, Marija B. PY - 2017 UR - https://vinar.vin.bg.ac.rs/handle/123456789/1715 AB - Depression is a disease of an abnormal brain energy metabolism also marked with increased apoptosis in specific brain regions. Mounting evidence indicates that the mitochondrial oxidative phosphorylation and apoptosis are novel targets for the actions of estrogen receptors (ERs). In this study, we examined the effects of antidepressant (AD) fluoxetine (FLU) treatment on the mitochondria] ER alpha (ER alpha), ER beta (total and phospho-pER(beta) and their association with cytochrome c (cyt oxidase activity and apoptotic Bcl2/Bax-molecules in the hippocampal mitochondria of chronically isolated (CPSI) female and male rats depicting depression. Impaired behaviour induced by CPSI was followed by decreased corticosterone (CORT) in both sexes and downregulation of cyt c oxidase in males. CPSI did not affect the ERa in either of sexes, but it decreased mitochondrial ER beta and increased pER beta in both sexes. Stress-reduced ER beta is associated with a decrease in mitochondrial energetic processes in males and with apoptotic mechanisms in females. FLU normalized behaviour in both sexes and increased cyt c oxidase in females. FLU elevated ERa in males, increased ER beta and decreased pERB in both sexes. The AD-induced alterations of ER beta paralleled with bioenergetics and pro-survival pathways in females. In conclusion, sex-unspecific regulation of ER beta by the stress and by AD and its differential convergence with bioenergetics and apoptotic pathways in females and males implies its role as a vulnerability factor in the stress response and emphasizes mitochondrial ER beta-dependent pathways as an important gateway of ADs action, at least in females. (C) 2017 Elsevier B.V. All rights reserved. T2 - Brain Research T1 - Mitochondrial estrogen receptors as a vulnerability factor of chronic stress and mediator of fluoxetine treatment in female and male rat hippocampus VL - 1671 SP - 77 EP - 84 DO - 10.1016/j.brainres.2017.07.007 ER -
@article{ author = "Adžić, Miroslav and Mitić, Miloš and Radoičić, Marija B.", year = "2017", abstract = "Depression is a disease of an abnormal brain energy metabolism also marked with increased apoptosis in specific brain regions. Mounting evidence indicates that the mitochondrial oxidative phosphorylation and apoptosis are novel targets for the actions of estrogen receptors (ERs). In this study, we examined the effects of antidepressant (AD) fluoxetine (FLU) treatment on the mitochondria] ER alpha (ER alpha), ER beta (total and phospho-pER(beta) and their association with cytochrome c (cyt oxidase activity and apoptotic Bcl2/Bax-molecules in the hippocampal mitochondria of chronically isolated (CPSI) female and male rats depicting depression. Impaired behaviour induced by CPSI was followed by decreased corticosterone (CORT) in both sexes and downregulation of cyt c oxidase in males. CPSI did not affect the ERa in either of sexes, but it decreased mitochondrial ER beta and increased pER beta in both sexes. Stress-reduced ER beta is associated with a decrease in mitochondrial energetic processes in males and with apoptotic mechanisms in females. FLU normalized behaviour in both sexes and increased cyt c oxidase in females. FLU elevated ERa in males, increased ER beta and decreased pERB in both sexes. The AD-induced alterations of ER beta paralleled with bioenergetics and pro-survival pathways in females. In conclusion, sex-unspecific regulation of ER beta by the stress and by AD and its differential convergence with bioenergetics and apoptotic pathways in females and males implies its role as a vulnerability factor in the stress response and emphasizes mitochondrial ER beta-dependent pathways as an important gateway of ADs action, at least in females. (C) 2017 Elsevier B.V. All rights reserved.", journal = "Brain Research", title = "Mitochondrial estrogen receptors as a vulnerability factor of chronic stress and mediator of fluoxetine treatment in female and male rat hippocampus", volume = "1671", pages = "77-84", doi = "10.1016/j.brainres.2017.07.007" }
Adžić, M., Mitić, M.,& Radoičić, M. B.. (2017). Mitochondrial estrogen receptors as a vulnerability factor of chronic stress and mediator of fluoxetine treatment in female and male rat hippocampus. in Brain Research, 1671, 77-84. https://doi.org/10.1016/j.brainres.2017.07.007
Adžić M, Mitić M, Radoičić MB. Mitochondrial estrogen receptors as a vulnerability factor of chronic stress and mediator of fluoxetine treatment in female and male rat hippocampus. in Brain Research. 2017;1671:77-84. doi:10.1016/j.brainres.2017.07.007 .
Adžić, Miroslav, Mitić, Miloš, Radoičić, Marija B., "Mitochondrial estrogen receptors as a vulnerability factor of chronic stress and mediator of fluoxetine treatment in female and male rat hippocampus" in Brain Research, 1671 (2017):77-84, https://doi.org/10.1016/j.brainres.2017.07.007 . .