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Cambier L, Rassam P, Chabi B, Mezghenna K, Gross R, Eveno E, Auffray C, Wrutniak-Cabello C, Lajoix AD, Pomiès P. M19 modulates skeletal muscle differentiation and insulin secretion in pancreatic β-cells through modulation of respiratory chain activity. PLoS One 2012; 7:e31815. [PMID: 22363741 PMCID: PMC3282743 DOI: 10.1371/journal.pone.0031815] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Accepted: 01/13/2012] [Indexed: 11/18/2022] Open
Abstract
Mitochondrial dysfunction due to nuclear or mitochondrial DNA alterations contributes to multiple diseases such as metabolic myopathies, neurodegenerative disorders, diabetes and cancer. Nevertheless, to date, only half of the estimated 1,500 mitochondrial proteins has been identified, and the function of most of these proteins remains to be determined. Here, we characterize the function of M19, a novel mitochondrial nucleoid protein, in muscle and pancreatic β-cells. We have identified a 13-long amino acid sequence located at the N-terminus of M19 that targets the protein to mitochondria. Furthermore, using RNA interference and over-expression strategies, we demonstrate that M19 modulates mitochondrial oxygen consumption and ATP production, and could therefore regulate the respiratory chain activity. In an effort to determine whether M19 could play a role in the regulation of various cell activities, we show that this nucleoid protein, probably through its modulation of mitochondrial ATP production, acts on late muscle differentiation in myogenic C2C12 cells, and plays a permissive role on insulin secretion under basal glucose conditions in INS-1 pancreatic β-cells. Our results are therefore establishing a functional link between a mitochondrial nucleoid protein and the modulation of respiratory chain activities leading to the regulation of major cellular processes such as myogenesis and insulin secretion.
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Affiliation(s)
- Linda Cambier
- CNRS UMR5237, Centre de Recherche en Biochimie Macromoléculaire, Montpellier, France
- Université Montpellier 1, Montpellier, France
- Université Montpellier 2, Montpellier, France
| | - Patrice Rassam
- CNRS UMR5237, Centre de Recherche en Biochimie Macromoléculaire, Montpellier, France
- Université Montpellier 1, Montpellier, France
- Université Montpellier 2, Montpellier, France
| | - Béatrice Chabi
- INRA UMR866, Dynamique Musculaire et Métabolisme, Montpellier, France
- Université Montpellier 1, Montpellier, France
- Université Montpellier 2, Montpellier, France
| | - Karima Mezghenna
- CNRS UMR5232, Centre for Pharmacology and Innovation in Diabetes, Montpellier, France
- Université Montpellier 1, Montpellier, France
| | - René Gross
- CNRS UMR5232, Centre for Pharmacology and Innovation in Diabetes, Montpellier, France
- Université Montpellier 1, Montpellier, France
| | - Eric Eveno
- Genexpress, Functional Genomics and Systems Biology for Health, CNRS Institute of Biological Sciences, Villejuif, France
| | - Charles Auffray
- Genexpress, Functional Genomics and Systems Biology for Health, CNRS Institute of Biological Sciences, Villejuif, France
| | - Chantal Wrutniak-Cabello
- INRA UMR866, Dynamique Musculaire et Métabolisme, Montpellier, France
- Université Montpellier 1, Montpellier, France
- Université Montpellier 2, Montpellier, France
| | - Anne-Dominique Lajoix
- CNRS UMR5232, Centre for Pharmacology and Innovation in Diabetes, Montpellier, France
- Université Montpellier 1, Montpellier, France
| | - Pascal Pomiès
- CNRS UMR5237, Centre de Recherche en Biochimie Macromoléculaire, Montpellier, France
- Université Montpellier 1, Montpellier, France
- Université Montpellier 2, Montpellier, France
- INSERM U1046, Physiologie et Médecine Expérimentale du Coeur et des Muscles, Montpellier, France
- * E-mail:
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2
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Wang Y, Hao Y, Alway SE. Suppression of GSK-3β activation by M-cadherin protects myoblasts against mitochondria-associated apoptosis during myogenic differentiation. J Cell Sci 2011; 124:3835-47. [PMID: 22114306 DOI: 10.1242/jcs.086686] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Apoptosis occurs concurrently with differentiation of muscle progenitor cells (MPCs) before they fuse to form myotubes. Dysregulated apoptosis in MPCs contributes to the low regeneration capability in aged muscle and decreases the survival rate of donor cells in stem cell-based therapies for muscular dystrophies. This study investigated the role of the M-cadherin/PI3K/Akt/GSK-3β signaling pathway in regulating apoptosis during differentiation of MPCs. Disruption of M-cadherin-dependent cell-cell adhesion by M-cadherin RNA interference in confluent C2C12 myoblasts sensitized the cells to mitochondria-associated intrinsic apoptosis induced by cell confluence or serum starvation. Further investigation of this pathway revealed that M-cadherin-mediated signaling suppressed GSK-3β activation by enhancing the PI3K/AKT-dependent inhibitory phosphorylation of Ser9 in GSK-3β. Overexpression of wild-type GSK-3β in confluent C2C12 myoblasts exacerbated the apoptosis, whereas chemical inhibition of GSK-3β using TDZD-8, or forced expression of constitutively active Akt (myrAkt), or a kinase-deficient GSK-3β mutant [GSK-3β(K85R)], attenuated apoptosis and rescued the impaired myogenic differentiation that is caused by M-cadherin RNA interference. These data suggest that M-cadherin-mediated signaling prevents acceleration of mitochondria-associated intrinsic apoptosis in MPCs by suppressing GSK-3β activation during myogenic differentiation.
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Affiliation(s)
- Yan Wang
- Laboratory of Muscle Biology and Sarcopenia, Division of Exercise Physiology, and Center for Cardiovascular and Respiratory Sciences, Robert C. Byrd Health Sciences Center, West Virginia University School of Medicine, Morgantown, West Virginia 26506, USA
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Seyer P, Grandemange S, Rochard P, Busson M, Pessemesse L, Casas F, Cabello G, Wrutniak-Cabello C. P43-dependent mitochondrial activity regulates myoblast differentiation and slow myosin isoform expression by control of Calcineurin expression. Exp Cell Res 2011; 317:2059-71. [PMID: 21664352 DOI: 10.1016/j.yexcr.2011.05.020] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Revised: 05/17/2011] [Accepted: 05/19/2011] [Indexed: 11/18/2022]
Abstract
We have previously shown that mitochondrial protein synthesis regulates myoblast differentiation, partly through the control of c-Myc expression, a cellular oncogene regulating myogenin expression and myoblast withdrawal from the cell cycle. In this study we provide evidence of the involvement of Calcineurin in this regulation. In C2C12 myoblasts, inhibition of mitochondrial protein synthesis by chloramphenicol decreases Calcineurin expression. Conversely, stimulation of this process by overexpressing the T3 mitochondrial receptor (p43) increases Calcineurin expression. Moreover, expression of a constitutively active Calcineurin (ΔCN) stimulates myoblast differentiation, whereas a Calcineurin antisense has the opposite effect. Lastly, ΔCN expression or stimulation of mitochondrial protein synthesis specifically increases slow myosin heavy chain expression. In conclusion, these data clearly suggest that, partly via Calcineurin expression, mitochondrial protein synthesis is involved in muscle development through the control of myoblast differentiation and probably the acquisition of the contractile and metabolic phenotype of muscle fibres.
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Affiliation(s)
- Pascal Seyer
- UMR 866 Différenciation Cellulaire et Croissance (INRA-UMI-UMII), Unité d'Endocrinologie Cellulaire, Institut National de la Recherche Agronomique (INRA), 2 Place Viala, 34060 Montpellier Cedex 1, France
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4
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Barbieri E, Battistelli M, Casadei L, Vallorani L, Piccoli G, Guescini M, Gioacchini AM, Polidori E, Zeppa S, Ceccaroli P, Stocchi L, Stocchi V, Falcieri E. Morphofunctional and Biochemical Approaches for Studying Mitochondrial Changes during Myoblasts Differentiation. J Aging Res 2011; 2011:845379. [PMID: 21629710 PMCID: PMC3100678 DOI: 10.4061/2011/845379] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Revised: 02/15/2011] [Accepted: 03/04/2011] [Indexed: 12/16/2022] Open
Abstract
This study describes mitochondrial behaviour during the C2C12 myoblast differentiation program and proposes a proteomic approach to mitochondria integrated with classical morphofunctional and biochemical analyses. Mitochondrial ultrastructure variations were determined by transmission electron microscopy; mitochondrial mass and membrane potential were analysed by Mitotracker Green and JC-1 stains and by epifluorescence microscope. Expression of PGC1α, NRF1α, and Tfam genes controlling mitochondrial biogenesis was studied by real-time PCR. The mitochondrial functionality was tested by cytochrome c oxidase activity and COXII expression. Mitochondrial proteomic profile was also performed. These assays showed that mitochondrial biogenesis and activity significantly increase in differentiating myotubes. The proteomic profile identifies 32 differentially expressed proteins, mostly involved in oxidative metabolism, typical of myotubes formation. Other notable proteins, such as superoxide dismutase (MnSOD), a cell protection molecule, and voltage-dependent anion-selective channel protein (VDAC1) involved in the mitochondria-mediated apoptosis, were found to be regulated by the myogenic process. The integration of these approaches represents a helpful tool for studying mitochondrial dynamics, biogenesis, and functionality in comparative surveys on mitochondrial pathogenic or senescent satellite cells.
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Affiliation(s)
- Elena Barbieri
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Via I Maggetti, 26, 61029 Urbino (PU), Italy
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Seyer P, Grandemange S, Busson M, Carazo A, Gamaléri F, Pessemesse L, Casas F, Cabello G, Wrutniak-Cabello C. Mitochondrial activity regulates myoblast differentiation by control of c-Myc expression. J Cell Physiol 2006; 207:75-86. [PMID: 16261590 DOI: 10.1002/jcp.20539] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We have previously shown that mitochondrial activity is an important regulator of myoblast differentiation, partly through processes targeting myogenin expression. Here, we investigated the possible involvement of c-myc in these processes. Inhibition of mitochondrial activity by chloramphenicol abrogated the decrease in c-myc mRNA and protein levels occurring at the onset of terminal differentiation. Conversely, stimulation of mitochondrial activity by overexpression of the T3 mitochondrial receptor (p43) down-regulated c-myc expression. In addition, c-myc overexpression mimicked the influence of mitochondrial activity inhibition on myoblast differentiation. Moreover, like chloramphenicol, c-myc overexpression strongly inhibited the myogenic influence of p43 overexpression. These data suggest that c-Myc is an important target of mitochondrial activity involved in the myogenic influence of the organelle. Lastly, we found that chloramphenicol influence is negatively related to the frequency of post-mitotic myoblasts in the culture at the onset of treatment, and cell cycle analyses demonstrated that the frequency of myoblasts in G0-G1 phase at cell confluence is increased by p43 overexpression and decreased by chloramphenicol or c-myc overexpression. These results suggest that irreversible myoblast withdrawal from the cell cycle is a target of mitochondrial activity by control of c-Myc expression.
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Affiliation(s)
- Pascal Seyer
- UMR 866 Différenciation Cellulaire et Croissance (INRA-UMII-ENSAM), Unité d'Endocrinologie Cellulaire, Institut National de la Recherche Agronomique, Montpellier Cedex 1, France
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7
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Takeuchi N, Ueda T. Down-regulation of the mitochondrial translation system during terminal differentiation of HL-60 cells by 12-O-tetradecanoyl-1-phorbol-13-acetate: comparison with the cytoplasmic translation system. J Biol Chem 2003; 278:45318-24. [PMID: 12952954 DOI: 10.1074/jbc.m307620200] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Mitochondrial (mt) biogenesis depends on both the nuclear and mt genomes, and a coordination of these two genetic systems is necessary for proper cell functioning. Little is known about the regulatory mechanisms of mt translation or about the expression of mt translation factors. Here, we studied the expression of mt translation factors during 12-O-tetradecanoyl-1-phorbol-13-acetate (TPA)-induced terminal differentiation of HL-60 cells. For all mt translation factors investigated, mRNA expression was markedly down-regulated in a coordinate and specific manner, whereas mRNA levels for the cytoplasmic translation factors showed only a slight reduction. An actinomycin D chase study and nuclear run-on assay revealed that the TPA-induced decrease in mt elongation factor Tu (EF-Tumt) mRNA mainly results from decreased mRNA stability. Polysome analysis showed that there was no significant translational control of mt translation factor (EF-Tumt, ribosomal proteins L7/L12mt and S12mt) mRNA expression during differentiation. Thus, the decreased protein level of one of these mt translation factors (EF-Tumt) simply reflects its decreased mRNA level. It was also demonstrated by pulse labeling of mt translation products that the down-regulation of mt translational activity is actually associated with down-regulated mt translation factor expression during cellular differentiation. Our results illustrate that the regulatory mechanisms of mt translational activity upon terminal differentiation (in response to the growth arrest) is different to that of the cytoplasmic system, where the control of mRNA translational efficiency of major translation factors is the central mechanism for their down-regulation.
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Affiliation(s)
- Nono Takeuchi
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Building FSB-401, 5-1-5, Kashiwanoha, Kashiwa, Chiba Prefecture 277-8562, Japan.
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Abstract
This review addresses the mechanisms by which mitochondrial structure and function are regulated, with a focus on vertebrate muscle. We consider the adaptive remodeling that arises during physiological transitions such as differentiation, development, and contractile activity. Parallels are drawn between such phenotypic changes and the pattern of change arising over evolutionary time, as suggested by interspecies comparisons. We address the physiological and evolutionary relationships between ATP production, thermogenesis, and superoxide generation in the context of mitochondrial function. Our discussion of mitochondrial structure focuses on the regulation of membrane composition and maintenance of the three-dimensional reticulum. Current studies of mitochondrial biogenesis strive to integrate muscle functional parameters with signal transduction and molecular genetics, providing insight into the origins of variation arising between physiological states, fiber types, and species.
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Affiliation(s)
- Christopher D Moyes
- Departments of Biology and Physiology, Queen's University, Kingston, Ontario Canada, K7L 3N6.
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Rochard P, Rodier A, Casas F, Cassar-Malek I, Marchal-Victorion S, Daury L, Wrutniak C, Cabello G. Mitochondrial activity is involved in the regulation of myoblast differentiation through myogenin expression and activity of myogenic factors. J Biol Chem 2000; 275:2733-44. [PMID: 10644737 DOI: 10.1074/jbc.275.4.2733] [Citation(s) in RCA: 153] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
To characterize the regulatory pathways involved in the inhibition of cell differentiation induced by the impairment of mitochondrial activity, we investigated the relationships occurring between organelle activity and myogenesis using an avian myoblast cell line (QM7). The inhibition of mitochondrial translation by chloramphenicol led to a potent block of myoblast differentiation. Carbonyl cyanide p-(trifluoromethoxy) phenylhydrazone and oligomycin, which affect the organelle at different levels, exerted a similar influence. In addition, we provided evidence that this phenomenon was not the result of an alteration in cell viability. Conversely, overexpression of the mitochondrial T3 receptor (p43) stimulated organelle activity and strongly potentiated myoblast differentiation. The involvement of mitochondrial activity in an actual regulation of myogenesis is further supported by results demonstrating that the muscle regulatory gene myogenin, in contrast to CMD1 (chicken MyoD) and myf5, is a specific transcriptional target of mitochondrial activity. Whereas myogenin mRNA and protein levels were down-regulated by chloramphenicol treatment, they were up-regulated by p43 overexpression, in a positive relationship with the expression level of the transgene. We also found that myogenin or CMD1 overexpression in chloramphenicol-treated myoblasts did not restore differentiation, thus indicating that an alteration in mitochondrial activity interferes with the ability of myogenic factors to induce terminal differentiation.
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Affiliation(s)
- P Rochard
- Laboratoire de Différenciation Cellulaire et Croissance, Unité d'Endocrinologie Cellulaire, Institut National de la Recherche Agronomique, place Viala, 34 060 Montpellier Cedex 1, France
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Wrutniak C, Rochard P, Casas F, Fraysse A, Charrier J, Cabello G. Physiological importance of the T3 mitochondrial pathway. Ann N Y Acad Sci 1998; 839:93-100. [PMID: 9629136 DOI: 10.1111/j.1749-6632.1998.tb10738.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- C Wrutniak
- Laboratoire de Différenciation Cellulaire et Croissance, INRA-ENSA, Montpellier, France
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Lafrenie RM, Yamada KM. Integrins and matrix molecules in salivary gland cell adhesion, signaling, and gene expression. Ann N Y Acad Sci 1998; 842:42-8. [PMID: 9599292 DOI: 10.1111/j.1749-6632.1998.tb09630.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Integrins play crucial roles in embryonic and adult cell adhesion, migration, morphogenesis, growth, and differentiation in many cell systems, including human salivary gland cells. Integrins function by binding through their extracellular domain to a specific peptide recognition site in a ligand, and then transmitting information to the cytoplasm by way of their cytoplasmic tails. By this transmembrane signaling process, integrins can mediate assembly of adhesion sites and organization of the actin-containing cytoskeleton by forming supermolecular complexes of cytoskeletal and signaling molecules. The specific steps in the assembly of these complexes as well as novel mechanisms for synergy between integrin and growth factor signaling pathways are still being determined. integrin-mediated interactions also have major effects on gene expression. For example, integrin-mediated adhesion to fibronectin by the HSG salivary gland cell line significantly alters the pattern of proteins synthesized and genes expressed. In fact, at least five transcription factors are activated, and over 30 genes (many of them novel) are found to be induced by such integrin-mediated interactions by salivary gland cells. The roles of integrins, in collaborative interactions with growth factors and signaling pathways, and in the induction of novel genes during salivary gland development, should provide fruitful areas of research for many years.
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Affiliation(s)
- R M Lafrenie
- Northeastern Ontario Regional Cancer Centre, Tumour Biology Research, Sudbury, Canada.
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