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Almasi S, SarmastiEmami S, Baird S, Ning Z, Figeys D, Côté J, Cowan KN, Jasmin BJ. Staufen1 controls mitochondrial metabolism via HIF2α in embryonal rhabdomyosarcoma and promotes tumorigenesis. Cell Mol Life Sci 2023; 80:328. [PMID: 37847286 PMCID: PMC11071833 DOI: 10.1007/s00018-023-04969-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 08/31/2023] [Accepted: 09/18/2023] [Indexed: 10/18/2023]
Abstract
Elevated mitochondrial metabolism promotes tumorigenesis of Embryonal Rhabdomyosarcomas (ERMS). Accordingly, targeting oxidative phosphorylation (OXPHOS) could represent a therapeutic strategy for ERMS. We previously demonstrated that genetic reduction of Staufen1 (STAU1) levels results in the inhibition of ERMS tumorigenicity. Here, we examined STAU1-mediated mechanisms in ERMS and focused on its potential involvement in regulating OXPHOS. We report the novel and differential role of STAU1 in mitochondrial metabolism in cancerous versus non-malignant skeletal muscle cells (NMSkMCs). Specifically, our data show that STAU1 depletion reduces OXPHOS and inhibits proliferation of ERMS cells. Our findings further reveal the binding of STAU1 to several OXPHOS mRNAs which affects their stability. Indeed, STAU1 depletion reduced the stability of OXPHOS mRNAs, causing inhibition of mitochondrial metabolism. In parallel, STAU1 depletion impacted negatively the HIF2α pathway which further modulates mitochondrial metabolism. Exogenous expression of HIF2α in STAU1-depleted cells reversed the mitochondrial inhibition and induced cell proliferation. However, opposite effects were observed in NMSkMCs. Altogether, these findings revealed the impact of STAU1 in the regulation of mitochondrial OXPHOS in cancer cells as well as its differential role in NMSkMCs. Overall, our results highlight the therapeutic potential of targeting STAU1 as a novel approach for inhibiting mitochondrial metabolism in ERMS.
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Affiliation(s)
- Shekoufeh Almasi
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, K1H 8M5, Canada
| | - Sahar SarmastiEmami
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, K1H 8M5, Canada
| | - Stephen Baird
- High Throughput Lab, CHEO, University of Ottawa, Ottawa, ON, K1H 8L1, Canada
| | - Zhibin Ning
- School of Pharmaceutical Sciences, Faculty of Medicine, University of Ottawa, Ottawa, ON, K1H 8M5, Canada
| | - Daniel Figeys
- School of Pharmaceutical Sciences, Faculty of Medicine, University of Ottawa, Ottawa, ON, K1H 8M5, Canada
| | - Jocelyn Côté
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, K1H 8M5, Canada
- The Eric J. Poulin Centre for Neuromuscular Diseases, Faculty of Medicine, University of Ottawa, Ottawa, ON, K1H 8M5, Canada
| | - Kyle N Cowan
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, K1H 8M5, Canada
- Department of Surgery, Division of Paediatric Surgery, University of Ottawa, Children's Hospital of Eastern Ontario, Ottawa, ON, K1Y 4E9, Canada
- Molecular Biomedicine Program, Children's Hospital of Eastern Ontario, Ottawa, ON, K1H 8L1, Canada
| | - Bernard J Jasmin
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, K1H 8M5, Canada.
- The Eric J. Poulin Centre for Neuromuscular Diseases, Faculty of Medicine, University of Ottawa, Ottawa, ON, K1H 8M5, Canada.
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Ciuffoli V, Lena AM, Gambacurta A, Melino G, Candi E. Myoblasts rely on TAp63 to control basal mitochondria respiration. Aging (Albany NY) 2019; 10:3558-3573. [PMID: 30487319 PMCID: PMC6286837 DOI: 10.18632/aging.101668] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 11/15/2018] [Indexed: 12/15/2022]
Abstract
p53, with its family members p63 and p73, have been shown to promote myoblast differentiation by regulation of the function of the retinoblastoma protein and by direct activation of p21Cip/Waf1 and p57Kip2, promoting cell cycle exit. In previous studies, we have demonstrated that the TAp63γ isoform is the only member of the p53 family that accumulates during in vitro myoblasts differentiation, and that its silencing led to delay in myotube fusion. To better dissect the role of TAp63γ in myoblast physiology, we have generated both sh-p63 and Tet-On inducible TAp63γ clones. Gene array analysis of sh-p63 C2C7 clones showed a significant modulation of genes involved in proliferation and cellular metabolism. Indeed, we found that sh-p63 C2C7 myoblasts present a higher proliferation rate and that, conversely, TAp63γ ectopic expression decreases myoblasts proliferation, indicating that TAp63γ specifically contributes to myoblasts proliferation, independently of p53 and p73. In addition, sh-p63 cells have a defect in mitochondria respiration highlighted by a reduction in spare respiratory capacity and a decrease in complex I, IV protein levels. These results demonstrated that, beside contributing to cell cycle exit, TAp63γ participates to myoblasts metabolism control.
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Affiliation(s)
- Veronica Ciuffoli
- Department of Experimental Medicine and TOR, University of Rome "Tor Vergata", Rome, Italy
| | - Anna Maria Lena
- Department of Experimental Medicine and TOR, University of Rome "Tor Vergata", Rome, Italy
| | - Alessandra Gambacurta
- Department of Experimental Medicine and TOR, University of Rome "Tor Vergata", Rome, Italy
| | - Gerry Melino
- Department of Experimental Medicine and TOR, University of Rome "Tor Vergata", Rome, Italy.,MRC-Toxicology Unit, University of Cambridge, Cambridge, UK
| | - Eleonora Candi
- Department of Experimental Medicine and TOR, University of Rome "Tor Vergata", Rome, Italy.,IDI-IRCCS, Biochemistry laboratory, Rome, Italy
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Jahnke VE, Sabido O, Defour A, Castells J, Lefai E, Roussel D, Freyssenet D. Evidence for mitochondrial respiratory deficiency in rat rhabdomyosarcoma cells. PLoS One 2010; 5:e8637. [PMID: 20072609 PMCID: PMC2797644 DOI: 10.1371/journal.pone.0008637] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2009] [Accepted: 12/11/2009] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND Mitochondria can sense signals linked to variations in energy demand to regulate nuclear gene expression. This retrograde signaling pathway is presumed to be involved in the regulation of myoblast proliferation and differentiation. Rhabdomyosarcoma cells are characterized by their failure to both irreversibly exit the cell cycle and complete myogenic differentiation. However, it is currently unknown whether mitochondria are involved in the failure of rhabdomyosarcoma cells to differentiate. METHODOLOGY/PRINCIPAL FINDINGS Mitochondrial biogenesis and metabolism were studied in rat L6E9 myoblasts and R1H rhabdomyosacoma cells during the cell cycle and after 36 hours of differentiation. Using a combination of flow cytometry, polarographic and molecular analyses, we evidenced a marked decrease in the cardiolipin content of R1H cells cultured in growth and differentiation media, together with a significant increase in the content of mitochondrial biogenesis factors and mitochondrial respiratory chain proteins. Altogether, these data indicate that the mitochondrial inner membrane composition and the overall process of mitochondrial biogenesis are markedly altered in R1H cells. Importantly, the dysregulation of protein-to-cardiolipin ratio was associated with major deficiencies in both basal and maximal mitochondrial respiration rates. This deficiency in mitochondrial respiration probably contributes to the inability of R1H cells to decrease mitochondrial H2O2 level at the onset of differentiation. CONCLUSION/SIGNIFICANCE A defect in the regulation of mitochondrial biogenesis and mitochondrial metabolism may thus be an epigenetic mechanism that may contribute to the tumoral behavior of R1H cells. Our data underline the importance of mitochondria in the regulation of myogenic differentiation.
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Affiliation(s)
- Vanessa E. Jahnke
- Université de Lyon, Université Jean Monnet, Laboratoire de Physiologie de l'Exercice EA4338, Saint Etienne, France
| | - Odile Sabido
- Université de Lyon, Université Jean Monnet, Laboratoire de Physiologie de l'Exercice EA4338, Saint Etienne, France
- Université de Lyon, Université Jean Monnet, Centre Commun de Cytométrie en Flux, Saint Etienne, France
| | - Aurélia Defour
- Université de Lyon, Université Jean Monnet, Laboratoire de Physiologie de l'Exercice EA4338, Saint Etienne, France
| | - Josiane Castells
- Université de Lyon, Université Jean Monnet, Laboratoire de Physiologie de l'Exercice EA4338, Saint Etienne, France
| | - Etienne Lefai
- Université de Lyon, Université Claude Bernard Lyon 1, Régulations Métaboliques Nutrition et Diabètes INSERM U870, Oullins, France
| | - Damien Roussel
- Université de Lyon, Université Claude Bernard Lyon 1, Laboratoire de Physiologie Intégrative Cellulaire et Moléculaire CNRS U5123, Villeurbanne, France
| | - Damien Freyssenet
- Université de Lyon, Université Jean Monnet, Laboratoire de Physiologie de l'Exercice EA4338, Saint Etienne, France
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Seppet E, Gruno M, Peetsalu A, Gizatullina Z, Nguyen HP, Vielhaber S, Wussling MH, Trumbeckaite S, Arandarcikaite O, Jerzembeck D, Sonnabend M, Jegorov K, Zierz S, Striggow F, Gellerich FN. Mitochondria and energetic depression in cell pathophysiology. Int J Mol Sci 2009; 10:2252-2303. [PMID: 19564950 PMCID: PMC2695278 DOI: 10.3390/ijms10052252] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Revised: 04/25/2009] [Accepted: 05/14/2009] [Indexed: 12/21/2022] Open
Abstract
Mitochondrial dysfunction is a hallmark of almost all diseases. Acquired or inherited mutations of the mitochondrial genome DNA may give rise to mitochondrial diseases. Another class of disorders, in which mitochondrial impairments are initiated by extramitochondrial factors, includes neurodegenerative diseases and syndromes resulting from typical pathological processes, such as hypoxia/ischemia, inflammation, intoxications, and carcinogenesis. Both classes of diseases lead to cellular energetic depression (CED), which is characterized by decreased cytosolic phosphorylation potential that suppresses the cell's ability to do work and control the intracellular Ca(2+) homeostasis and its redox state. If progressing, CED leads to cell death, whose type is linked to the functional status of the mitochondria. In the case of limited deterioration, when some amounts of ATP can still be generated due to oxidative phosphorylation (OXPHOS), mitochondria launch the apoptotic cell death program by release of cytochrome c. Following pronounced CED, cytoplasmic ATP levels fall below the thresholds required for processing the ATP-dependent apoptotic cascade and the cell dies from necrosis. Both types of death can be grouped together as a mitochondrial cell death (MCD). However, there exist multiple adaptive reactions aimed at protecting cells against CED. In this context, a metabolic shift characterized by suppression of OXPHOS combined with activation of aerobic glycolysis as the main pathway for ATP synthesis (Warburg effect) is of central importance. Whereas this type of adaptation is sufficiently effective to avoid CED and to control the cellular redox state, thereby ensuring the cell survival, it also favors the avoidance of apoptotic cell death. This scenario may underlie uncontrolled cellular proliferation and growth, eventually resulting in carcinogenesis.
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Affiliation(s)
- Enn Seppet
- Department of Pathophysiology, University of Tartu, Tartu, Estonia; E-Mail:
(M.G.)
| | - Marju Gruno
- Department of Pathophysiology, University of Tartu, Tartu, Estonia; E-Mail:
(M.G.)
| | - Ants Peetsalu
- Department of Surgery, University of Tartu, Tartu, Estonia; E-Mail:
(A.P.)
| | - Zemfira Gizatullina
- KeyNeurotek AG, ZENIT-Technology Park Magdeburg, Magdeburg, Germany; E-Mails:
(Z.G.);
(D.J.);
(M.S.);
(K.J.);
(F.S.);
(F.N.G.)
| | - Huu Phuc Nguyen
- Department of Medical Genetics, University of Tübingen, Tübingen, Germany; E-Mail:
(H.P.N.)
| | - Stefan Vielhaber
- Department of Neurology, Otto von Guericke University, Magdeburg, Germany; E-Mail:
(S.V.)
| | - Manfred H.P. Wussling
- Bernstein Institute for Physiology, Martin-Luther-University Halle-Wittenberg, Germany; E-Mail:
(M.H.P.W.)
| | - Sonata Trumbeckaite
- Institute for Biomedical Research, Kaunas University of Medicine, Kaunas, Lithuania; E-Mails:
(S.T.);
(O.A.)
| | - Odeta Arandarcikaite
- Institute for Biomedical Research, Kaunas University of Medicine, Kaunas, Lithuania; E-Mails:
(S.T.);
(O.A.)
| | - Doreen Jerzembeck
- KeyNeurotek AG, ZENIT-Technology Park Magdeburg, Magdeburg, Germany; E-Mails:
(Z.G.);
(D.J.);
(M.S.);
(K.J.);
(F.S.);
(F.N.G.)
| | - Maria Sonnabend
- KeyNeurotek AG, ZENIT-Technology Park Magdeburg, Magdeburg, Germany; E-Mails:
(Z.G.);
(D.J.);
(M.S.);
(K.J.);
(F.S.);
(F.N.G.)
| | - Katharina Jegorov
- KeyNeurotek AG, ZENIT-Technology Park Magdeburg, Magdeburg, Germany; E-Mails:
(Z.G.);
(D.J.);
(M.S.);
(K.J.);
(F.S.);
(F.N.G.)
| | - Stephan Zierz
- Department of Neurology, Martin-Luther-University Halle-Wittenberg, Germany; E-Mail:
(S.Z.)
| | - Frank Striggow
- KeyNeurotek AG, ZENIT-Technology Park Magdeburg, Magdeburg, Germany; E-Mails:
(Z.G.);
(D.J.);
(M.S.);
(K.J.);
(F.S.);
(F.N.G.)
| | - Frank N. Gellerich
- KeyNeurotek AG, ZENIT-Technology Park Magdeburg, Magdeburg, Germany; E-Mails:
(Z.G.);
(D.J.);
(M.S.);
(K.J.);
(F.S.);
(F.N.G.)
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