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Millet AMC, Coustham C, Champigny C, Botella M, Demeilliers C, Devin A, Galinier A, Belenguer P, Bordeneuve-Guibé J, Davezac N. OPA1 deficiency impairs oxidative metabolism in cycling cells, underlining a translational approach for degenerative diseases. Dis Model Mech 2023; 16:dmm050266. [PMID: 37497665 PMCID: PMC10538295 DOI: 10.1242/dmm.050266] [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: 04/24/2023] [Accepted: 07/12/2023] [Indexed: 07/28/2023] Open
Abstract
Dominant optic atrophy is an optic neuropathy with varying clinical symptoms and progression. A severe disorder is associated with certain OPA1 mutations and includes additional symptoms for >20% of patients. This underscores the consequences of OPA1 mutations in different cellular populations, not only retinal ganglionic cells. We assessed the effects of OPA1 loss of function on oxidative metabolism and antioxidant defences using an RNA-silencing strategy in a human epithelial cell line. We observed a decrease in the mitochondrial respiratory chain complexes, associated with a reduction in aconitase activity related to an increase in reactive oxygen species (ROS) production. In response, the NRF2 (also known as NFE2L2) transcription factor was translocated into the nucleus and upregulated SOD1 and GSTP1. This study highlights the effects of OPA1 deficiency on oxidative metabolism in replicative cells, as already shown in neurons. It underlines a translational process to use cycling cells to circumvent and describe oxidative metabolism. Moreover, it paves the way to predict the evolution of dominant optic atrophy using mathematical models that consider mitochondrial ROS production and their detoxifying pathways.
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Affiliation(s)
- Aurélie M. C. Millet
- Research Center on Animal Cognition (CRCA), Center for Integrative Biology (CBI), Toulouse University, CNRS, UPS, 31400Toulouse, France
| | - Corentin Coustham
- Research Center on Animal Cognition (CRCA), Center for Integrative Biology (CBI), Toulouse University, CNRS, UPS, 31400Toulouse, France
- ISAE-SUPAERO, Toulouse University, 31400 Toulouse, France
| | - Camille Champigny
- Research Center on Animal Cognition (CRCA), Center for Integrative Biology (CBI), Toulouse University, CNRS, UPS, 31400Toulouse, France
| | - Marlène Botella
- Research Center on Animal Cognition (CRCA), Center for Integrative Biology (CBI), Toulouse University, CNRS, UPS, 31400Toulouse, France
| | | | - Anne Devin
- Laboratoire Métabolisme Energétique Cellulaire IBGC du CNRS, 1 rue Camille Saint Saëns, 33077 Bordeaux cedex, France
| | - Anne Galinier
- RESTORE – Université de Toulouse, CNRS ERL5311, EFS, INP-ENVT, Inserm U1031, UPS, Bâtiment INCERE, 4bis avenue Hubert Curien, 31100 Toulouse, France
| | - Pascale Belenguer
- Research Center on Animal Cognition (CRCA), Center for Integrative Biology (CBI), Toulouse University, CNRS, UPS, 31400Toulouse, France
| | | | - Noélie Davezac
- Research Center on Animal Cognition (CRCA), Center for Integrative Biology (CBI), Toulouse University, CNRS, UPS, 31400Toulouse, France
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Kinetic Mathematical Modeling of Oxidative Phosphorylation in Cardiomyocyte Mitochondria. Cells 2022; 11:cells11244020. [PMID: 36552784 PMCID: PMC9777548 DOI: 10.3390/cells11244020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 12/05/2022] [Accepted: 12/08/2022] [Indexed: 12/15/2022] Open
Abstract
Oxidative phosphorylation (OXPHOS) is an oxygen-dependent process that consumes catabolized nutrients to produce adenosine triphosphate (ATP) to drive energy-dependent biological processes such as excitation-contraction coupling in cardiomyocytes. In addition to in vivo and in vitro experiments, in silico models are valuable for investigating the underlying mechanisms of OXPHOS and predicting its consequences in both physiological and pathological conditions. Here, we compare several prominent kinetic models of OXPHOS in cardiomyocytes. We examine how their mathematical expressions were derived, how their parameters were obtained, the conditions of their experimental counterparts, and the predictions they generated. We aim to explore the general landscape of energy production mechanisms in cardiomyocytes for future in silico models.
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Li H, Yu X, Meng F, Zhao Z, Guan S, Wang L. Ferulic Acid Supplementation Increases Lifespan and Stress Resistance via Insulin/IGF-1 Signaling Pathway in C. elegans. Int J Mol Sci 2021; 22:4279. [PMID: 33924155 PMCID: PMC8074393 DOI: 10.3390/ijms22084279] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/12/2021] [Accepted: 04/17/2021] [Indexed: 01/18/2023] Open
Abstract
Ferulic acid (FA) is a naturally-occurring well-known potent antioxidant and free radical scavenger. FA supplementation is an effective strategy to delay aging, but the underlying mechanism remains unknown. In the present study, we examined the effects of FA on lifespan extension and its mechanism of FA in Caenorhabditis elegans (C. elegans). Results suggested that FA increased the lifespan of C. elegans, rather than altering the growth of E. coli OP50. Meanwhile, FA promoted the healthspan of C. elegans by improving locomotion and reducing fat accumulation and polyQ aggregation. FA increased the resistance to heat and oxidative stress through reducing ROS. The upregulating of the expression of the hlh-30, skn-1, and hsf-1 were involved in the FA-mediated lifespan extension. Furthermore, FA treatment had no impact on the lifespan of daf-2, hlh-30, skn-1, and hsf-1 mutants, confirming that insulin/IGF-1 signaling pathway and multiple longevity mechanisms were associated with the longevity mechanism of FA. We further found that mitochondrial signaling pathway was modulation involved in FA-mediated lifespan extension. With the results from RNA-seq results and mutants lifespan assay. These findings contribute to our knowledge of the lifespan extension and underlying mechanism of action of FA in C. elegans.
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Affiliation(s)
- Hui Li
- Key Laboratory for Molecular Enzymology and Engineering, The Ministry of Education, Jilin University, Changchun 130012, China; (H.L.); (S.G.)
- School of Life Sciences, Jilin University, Changchun 130012, China; (X.Y.); (F.M.); (Z.Z.)
| | - Xiaoxuan Yu
- School of Life Sciences, Jilin University, Changchun 130012, China; (X.Y.); (F.M.); (Z.Z.)
| | - Fanwei Meng
- School of Life Sciences, Jilin University, Changchun 130012, China; (X.Y.); (F.M.); (Z.Z.)
| | - Zhenyu Zhao
- School of Life Sciences, Jilin University, Changchun 130012, China; (X.Y.); (F.M.); (Z.Z.)
| | - Shuwen Guan
- Key Laboratory for Molecular Enzymology and Engineering, The Ministry of Education, Jilin University, Changchun 130012, China; (H.L.); (S.G.)
- School of Life Sciences, Jilin University, Changchun 130012, China; (X.Y.); (F.M.); (Z.Z.)
- Engineering Laboratory for AIDS Vaccine, Jilin University, Changchun 130012, China
| | - Liping Wang
- Key Laboratory for Molecular Enzymology and Engineering, The Ministry of Education, Jilin University, Changchun 130012, China; (H.L.); (S.G.)
- School of Life Sciences, Jilin University, Changchun 130012, China; (X.Y.); (F.M.); (Z.Z.)
- Engineering Laboratory for AIDS Vaccine, Jilin University, Changchun 130012, China
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Amoushahi M, Salehnia M. Reactive oxygen species level, mitochondrial transcription factor A gene expression and succinate dehydrogenase activity in metaphase II oocytes derived from in vitro cultured vitrified mouse ovaries. VETERINARY RESEARCH FORUM : AN INTERNATIONAL QUARTERLY JOURNAL 2018; 9:145-152. [PMID: 30065803 PMCID: PMC6047572 DOI: 10.30466/vrf.2018.30824] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 12/12/2018] [Indexed: 12/13/2022]
Abstract
The aim of this study was to evaluate the effects of ovarian tissue vitrification and two-step in vitro culture on the metaphase II (MII) oocyte reactive oxygen species (ROS) level, mitochondrial transcription factor A (TFAM) expression and succinate dehydrogenase (SDH) activity. After collection of neonatal mouse ovaries, 45 ovaries were vitrified and the others (n = 45) were considered as control. All ovaries were cultured for seven days, and their isolated preantral follicles were cultured in three-dimensional culture system. After 12 days, the follicular development and oocyte maturation were evaluated and compared in vitrified and non-vitrified ovaries. The collected MII oocytes were inseminated with capacitated spermatozoa. Then, the fertilization, embryonic development, ROS level, TFAM gene expression and SDH activity of oocytes were assessed and compared. There was no significant difference between morphology and percentage of normal follicles between vitrified and non-vitrified ovaries at the beginning of culture. The follicular development and hormone level in the vitrified group was significantly lower than non-vitrified group and the ROS concentration in the vitrified group was significantly higher than non-vitrified group after one-week culture. After follicular culture, there was no significant difference in follicular development, oocyte maturation, fertilization rate, TFAM gene expression, ROS level and mitochondrial SDH activity between the groups. This study showed that ovarian tissue vitrification influences the follicular development through increase in ROS level during culture but these harmful effects may be recovered during the follicular culture period. Thus, vitrification and ovarian culture method should be improved.
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Affiliation(s)
- Mahboobeh Amoushahi
- Department of Anatomy, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Mojdeh Salehnia
- Department of Anatomy, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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Heiske M, Letellier T, Klipp E. Comprehensive mathematical model of oxidative phosphorylation valid for physiological and pathological conditions. FEBS J 2017. [PMID: 28646582 DOI: 10.1111/febs.14151] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We developed a mathematical model of oxidative phosphorylation (OXPHOS) that allows for a precise description of mitochondrial function with respect to the respiratory flux and the ATP production. The model reproduced flux-force relationships under various experimental conditions (state 3 and 4, uncoupling, and shortage of respiratory substrate) as well as time courses, exhibiting correct P/O ratios. The model was able to reproduce experimental threshold curves for perturbations of the respiratory chain complexes, the F1 F0 -ATP synthase, the ADP/ATP carrier, the phosphate/OH carrier, and the proton leak. Thus, the model is well suited to study complex interactions within the OXPHOS system, especially with respect to physiological adaptations or pathological modifications, influencing substrate and product affinities or maximal catalytic rates. Moreover, it could be a useful tool to study the role of OXPHOS and its capacity to compensate or enhance physiopathologies of the mitochondrial and cellular energy metabolism.
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Affiliation(s)
- Margit Heiske
- Laboratoire d'Anthropologie Moléculaire et Imaginérie de Synthèse, Médecine Evolutive, UMR 5288 CNRS, Faculté de Médecine, Université de Toulouse, France.,Theoretische Biophysik, Institut für Biologie, Humboldt-Universität zu Berlin, Germany
| | - Thierry Letellier
- Laboratoire d'Anthropologie Moléculaire et Imaginérie de Synthèse, Médecine Evolutive, UMR 5288 CNRS, Faculté de Médecine, Université de Toulouse, France
| | - Edda Klipp
- Theoretische Biophysik, Institut für Biologie, Humboldt-Universität zu Berlin, Germany
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