FATE1 antagonizes calcium- and drug-induced apoptosis by uncoupling ER and mitochondria

Several stimuli induce programmed cell death by increasing Ca 2+ transfer from the endoplasmic reticulum (ER) to mitochondria. Perturbation of this process has a special relevance in pathologies as cancer and neurodegenerative disorders. Mitochondrial Ca 2+ uptake mainly takes place in correspondenc...

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Veröffentlicht in:EMBO reports 2016-09, Vol.17 (9), p.1264-1280
Hauptverfasser: Doghman-Bouguerra, Mabrouka, Granatiero, Veronica, Sbiera, Silviu, Sbiera, Iuliu, Lacas-Gervais, Sandra, Brau, Frédéric, Fassnacht, Martin, Rizzuto, Rosario, Lalli, Enzo
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container_end_page 1280
container_issue 9
container_start_page 1264
container_title EMBO reports
container_volume 17
creator Doghman-Bouguerra, Mabrouka
Granatiero, Veronica
Sbiera, Silviu
Sbiera, Iuliu
Lacas-Gervais, Sandra
Brau, Frédéric
Fassnacht, Martin
Rizzuto, Rosario
Lalli, Enzo
description Several stimuli induce programmed cell death by increasing Ca 2+ transfer from the endoplasmic reticulum (ER) to mitochondria. Perturbation of this process has a special relevance in pathologies as cancer and neurodegenerative disorders. Mitochondrial Ca 2+ uptake mainly takes place in correspondence of mitochondria‐associated ER membranes (MAM), specialized contact sites between the two organelles. Here, we show the important role of FATE1, a cancer‐testis antigen, in the regulation of ER–mitochondria distance and Ca 2+ uptake by mitochondria. FATE1 is localized at the interface between ER and mitochondria, fractionating into MAM. FATE1 expression in adrenocortical carcinoma (ACC) cells under the control of the transcription factor SF‐1 decreases ER–mitochondria contact and mitochondrial Ca 2+ uptake, while its knockdown has an opposite effect. FATE1 also decreases sensitivity to mitochondrial Ca 2+ ‐dependent pro‐apoptotic stimuli and to the chemotherapeutic drug mitotane. In patients with ACC, FATE1 expression in their tumor is inversely correlated with their overall survival. These results show that the ER–mitochondria uncoupling activity of FATE1 is harnessed by cancer cells to escape apoptotic death and resist the action of chemotherapeutic drugs. Synopsis This study shows that FATE1, a cancer‐testis antigen, is localized at the interface between the ER and mitochondria where it modulates the coupling of the two organelles and apoptotic cell death. FATE1 is a cancer‐testis antigen. FATE1 levels are a prognostic indicator in adrenocortical carcinoma patients. Graphical Abstract This study shows that FATE1, a cancer‐testis antigen, is localized at the interface between the ER and mitochondria where it modulates the coupling of the two organelles and apoptotic cell death.
doi_str_mv 10.15252/embr.201541504
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Perturbation of this process has a special relevance in pathologies as cancer and neurodegenerative disorders. Mitochondrial Ca 2+ uptake mainly takes place in correspondence of mitochondria‐associated ER membranes (MAM), specialized contact sites between the two organelles. Here, we show the important role of FATE1, a cancer‐testis antigen, in the regulation of ER–mitochondria distance and Ca 2+ uptake by mitochondria. FATE1 is localized at the interface between ER and mitochondria, fractionating into MAM. FATE1 expression in adrenocortical carcinoma (ACC) cells under the control of the transcription factor SF‐1 decreases ER–mitochondria contact and mitochondrial Ca 2+ uptake, while its knockdown has an opposite effect. FATE1 also decreases sensitivity to mitochondrial Ca 2+ ‐dependent pro‐apoptotic stimuli and to the chemotherapeutic drug mitotane. In patients with ACC, FATE1 expression in their tumor is inversely correlated with their overall survival. These results show that the ER–mitochondria uncoupling activity of FATE1 is harnessed by cancer cells to escape apoptotic death and resist the action of chemotherapeutic drugs. Synopsis This study shows that FATE1, a cancer‐testis antigen, is localized at the interface between the ER and mitochondria where it modulates the coupling of the two organelles and apoptotic cell death. FATE1 is a cancer‐testis antigen. FATE1 levels are a prognostic indicator in adrenocortical carcinoma patients. 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These results show that the ER–mitochondria uncoupling activity of FATE1 is harnessed by cancer cells to escape apoptotic death and resist the action of chemotherapeutic drugs. Synopsis This study shows that FATE1, a cancer‐testis antigen, is localized at the interface between the ER and mitochondria where it modulates the coupling of the two organelles and apoptotic cell death. FATE1 is a cancer‐testis antigen. FATE1 levels are a prognostic indicator in adrenocortical carcinoma patients. 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subjects adrenal cortex
Adrenocortical Carcinoma - genetics
Adrenocortical Carcinoma - metabolism
Adrenocortical Carcinoma - mortality
Antigens
Antineoplastic Agents, Hormonal - pharmacology
Apoptosis
Apoptosis - drug effects
Biochemistry, Molecular Biology
Calcium
Calcium - metabolism
Cancer
Cellular Biology
Chemotherapy
DNA-Binding Proteins - chemistry
DNA-Binding Proteins - genetics
DNA-Binding Proteins - metabolism
EMBO07
endocrine cancer
Endoplasmic reticulum
Endoplasmic Reticulum - metabolism
Endoplasmic Reticulum - ultrastructure
Gene Expression
Humans
Life Sciences
MAM
Membrane Potential, Mitochondrial
Mitochondria
Mitochondria - metabolism
Mitochondria - ultrastructure
Mitochondrial Membranes - metabolism
Mitotane - pharmacology
Mortality
Prognosis
Protein Binding
Protein Interaction Domains and Motifs
Protein Transport
Scientific Report
Scientific Reports
Steroids - pharmacology
Transcription Factors - chemistry
Transcription Factors - genetics
Transcription Factors - metabolism
title FATE1 antagonizes calcium- and drug-induced apoptosis by uncoupling ER and mitochondria
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