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Yildirim RM, Seli E. The role of mitochondrial dynamics in oocyte and early embryo development. Semin Cell Dev Biol 2024; 159-160:52-61. [PMID: 38330625 DOI: 10.1016/j.semcdb.2024.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 01/09/2024] [Accepted: 01/25/2024] [Indexed: 02/10/2024]
Abstract
Mitochondrial dysfunction is widely implicated in various human diseases, through mechanisms that go beyond mitochondria's well-established role in energy generation. These dynamic organelles exert vital control over numerous cellular processes, including calcium regulation, phospholipid synthesis, innate immunity, and apoptosis. While mitochondria's importance is acknowledged in all cell types, research has revealed the exceptionally dynamic nature of the mitochondrial network in oocytes and embryos, finely tuned to meet unique needs during gamete and pre-implantation embryo development. Within oocytes, both the quantity and morphology of mitochondria can significantly change during maturation and post-fertilization. These changes are orchestrated by fusion and fission processes (collectively known as mitochondrial dynamics), crucial for energy production, content exchange, and quality control as mitochondria adjust to the shifting energy demands of oocytes and embryos. The roles of proteins that regulate mitochondrial dynamics in reproductive processes have been primarily elucidated through targeted deletion studies in animal models. Notably, impaired mitochondrial dynamics have been linked to female reproductive health, affecting oocyte quality, fertilization, and embryo development. Dysfunctional mitochondria can lead to fertility problems and can have an impact on the success of pregnancy, particularly in older reproductive age women.
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Affiliation(s)
- Raziye Melike Yildirim
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Emre Seli
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA.
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2
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Li A, Zhang Y, Wang J, Zhang Y, Su W, Gao F, Jiao X. Txnip Gene Knockout Ameliorated High-Fat Diet-Induced Cardiomyopathy Via Regulating Mitochondria Dynamics and Fatty Acid Oxidation. J Cardiovasc Pharmacol 2023; 81:423-433. [PMID: 36888974 PMCID: PMC10237349 DOI: 10.1097/fjc.0000000000001414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 02/23/2023] [Indexed: 03/10/2023]
Abstract
ABSTRACT Epidemic of obesity accelerates the increase in the number of patients with obesity cardiomyopathy. Thioredoxin interacting protein (TXNIP) has been implicated in the pathogenesis of multiple cardiovascular diseases. However, its specific role in obesity cardiomyopathy is still not well understood. Here, we evaluated the role of TXNIP in obesity-induced cardiomyopathy by feeding wild-type and txnip gene knockout mice with either normal diet or high-fat diet (HFD) for 24 weeks. Our results suggested that TXNIP deficiency improved mitochondrial dysfunction via reversing the shift from mitochondrial fusion to fission in the context of chronic HFD feeding, thus promoting cardiac fatty acid oxidation to alleviate chronic HFD-induced lipid accumulation in the heart, and thereby ameliorating the cardiac function in obese mice. Our work provides a theoretical basis for TXNIP exerting as a potential therapeutic target for the interventions of obesity cardiomyopathy.
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Affiliation(s)
- Aiyun Li
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China; and
| | - Yichao Zhang
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China; and
| | - Jin Wang
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China; and
| | - Yan Zhang
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China; and
| | - Wanzhen Su
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China; and
| | - Feng Gao
- Sixth Clinical Medical College of Shanxi Medical University, Taiyuan, China
| | - Xiangying Jiao
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China; and
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3
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Yang SG, Bae JW, Park HJ, Koo DB. Mito-TEMPO protects preimplantation porcine embryos against mitochondrial fission-driven apoptosis through DRP1/PINK1-mediated mitophagy. Life Sci 2023; 315:121333. [PMID: 36608867 DOI: 10.1016/j.lfs.2022.121333] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/09/2022] [Accepted: 12/24/2022] [Indexed: 01/05/2023]
Abstract
AIMS Mdivi-1 (Md-1) is a well-known inhibitor of mitochondrial fission and mitophagy. The mitochondrial superoxide scavenger Mito-TEMPO (MT) exerts positive effects on the developmental competence of pig embryos. This study aimed to explore the adverse effects of Md-1 on developmental capacity in porcine embryos and the protective effects of MT against Md-1-induced injury. MAIN METHODS We exposed porcine embryos to Md-1 (10 and 50 μM) for 2 days after in vitro fertilization (IVF). MT (0.1 μM) treatment was applied for 4 days after exposing embryos to Md-1. We assessed blastocyst development, DNA damage, mitochondrial superoxide production, and mitochondrial distribution using TUNEL assay, Mito-SOX, and Mito-tracker, respectively. Subsequently, the expression of PINK1, DRP1, and p-DRP1Ser616 was evaluated via immunofluorescence staining and Western blot analysis. KEY FINDINGS Md-1 compromised the developmental competence of blastocysts. Apoptosis and mitochondrial superoxide production were significantly upregulated in 50 μM Md-1-treated embryos, accompanied by a downregulation of p-DRP1Ser616, PINK1, and LC3B levels and lower mitophagy activity at the blastocyst stage. We confirmed the protective effects of MT against the detrimental effect of Md-1 on blastocyst developmental competence, mitochondrial fission, and DRP1/PINK1-mediated mitophagy activation. Eventually, MT recovered DRP1/PINK1-mediated mitophagy and mitochondrial fission by inhibiting superoxide production in Md-1-treated embryos. SIGNIFICANCE MT protects against detrimental effects of Md-1 on porcine embryos by suppressing superoxide production. These findings expand available scientific knowledge on improving outcomes of IVF.
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Affiliation(s)
- Seul-Gi Yang
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk 38453, Republic of Korea; Institute of Infertility, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk 38453, Republic of Korea
| | - Jin-Wook Bae
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk 38453, Republic of Korea; Institute of Infertility, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk 38453, Republic of Korea
| | - Hyo-Jin Park
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk 38453, Republic of Korea; Institute of Infertility, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk 38453, Republic of Korea.
| | - Deog-Bon Koo
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk 38453, Republic of Korea; Institute of Infertility, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk 38453, Republic of Korea.
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4
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Marta C, Dawid W, Silvestre S, Pawel G, Salvatore P, Modliński JA, Pasqualino L. Mitochondrial function and intracellular distribution is severely affected in in vitro cultured mouse embryos. Sci Rep 2022; 12:16152. [PMID: 36167966 PMCID: PMC9515144 DOI: 10.1038/s41598-022-20374-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 09/13/2022] [Indexed: 11/09/2022] Open
Abstract
Studies of mitochondrial dynamics have identified an intriguing link between energy supply balance and mitochondrial architecture. This suggests that inappropriate culture conditions might inhibit mitochondrial functions, and affect embryonic development. Therefore, this study was conducted to determine whether in vitro culture (IVC) might affect mitochondrial function, distribution, organization (by Mitotracker Green), gene expression on RNA level (by qPCR), and protein expression and localization (by western blot and immunostaining) involved in regulation of mitochondrial functions. Mitochondria in 2-cell IVC embryos were less numerous compare to IN VIVO while the localization and distribution do not differ between the groups. Mitochondria of in vivo blastocysts formed elongated network along the cells, while in IVC were fragmented, rounded, and aggregated mainly in the perinuclear region. Additionally, mitochondria of IN VIVO embryos moved back and forth along their long axis on radial tracks, while in IVC blastocysts were much less active. mtDNA copy number in IVC blastocysts (92,336.65 ± 5860.04) was significantly lower than that of IN VIVO (169,103.92 ± 16,322.41; P < 0.02) as well as lower protein expressions responsible for mitochondrial fusion was observed in IVC blastocysts. Results indicate that in vitro culture affect on perturbations in mitochondrial number and function, which is associated with decreased developmental competence of in vitro produced mouse embryos.
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Affiliation(s)
- Czernik Marta
- Institute of Genetics and Animal Biotechnology, Polish Academy of Sciences, Jastrzębiec, ul. Postepu 36A, Poland. .,Faculty of Veterinary Medicine, University of Teramo, Via Balzarini 1, Teramo, Italy.
| | - Winiarczyk Dawid
- Institute of Genetics and Animal Biotechnology, Polish Academy of Sciences, Jastrzębiec, ul. Postepu 36A, Poland
| | - Sampino Silvestre
- Institute of Genetics and Animal Biotechnology, Polish Academy of Sciences, Jastrzębiec, ul. Postepu 36A, Poland
| | - Greda Pawel
- Department of Morphological Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences, Warsaw, Poland
| | - Parillo Salvatore
- Faculty of Veterinary Medicine, University of Teramo, Via Balzarini 1, Teramo, Italy
| | - Jacek Andrzej Modliński
- Institute of Genetics and Animal Biotechnology, Polish Academy of Sciences, Jastrzębiec, ul. Postepu 36A, Poland
| | - Loi Pasqualino
- Faculty of Veterinary Medicine, University of Teramo, Via Balzarini 1, Teramo, Italy
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5
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Li Y, Mei NH, Cheng GP, Yang J, Zhou LQ. Inhibition of DRP1 Impedes Zygotic Genome Activation and Preimplantation Development in Mice. Front Cell Dev Biol 2021; 9:788512. [PMID: 34926466 PMCID: PMC8675387 DOI: 10.3389/fcell.2021.788512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 11/18/2021] [Indexed: 12/01/2022] Open
Abstract
Mitochondrion plays an indispensable role during preimplantation embryo development. Dynamic-related protein 1 (DRP1) is critical for mitochondrial fission and controls oocyte maturation. However, its role in preimplantation embryo development is still lacking. In this study, we demonstrate that inhibition of DRP1 activity by mitochondrial division inhibitor-1, a small molecule reported to specifically inhibit DRP1 activity, can cause severe developmental arrest of preimplantation embryos in a dose-dependent manner in mice. Meanwhile, DRP1 inhibition resulted in mitochondrial dysfunction including decreased mitochondrial activity, loss of mitochondrial membrane potential, reduced mitochondrial copy number and inadequate ATP by disrupting both expression and activity of DRP1 and mitochondrial complex assembly, leading to excessive ROS production, severe DNA damage and cell cycle arrest at 2-cell embryo stage. Furthermore, reduced transcriptional and translational activity and altered histone modifications in DRP1-inhibited embryos contributed to impeded zygotic genome activation, which prevented early embryos from efficient development beyond 2-cell embryo stage. These results show that DRP1 inhibition has potential cytotoxic effects on mammalian reproduction, and DRP1 inhibitor should be used with caution when it is applied to treat diseases. Additionally, this study improves our understanding of the crosstalk between mitochondrial metabolism and zygotic genome activation.
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Affiliation(s)
- Yuanyuan Li
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ning-Hua Mei
- Reproductive Medical Center, Renmin Hospital, Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan University, Wuhan, China
| | - Gui-Ping Cheng
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Yang
- Reproductive Medical Center, Renmin Hospital, Hubei Clinic Research Center for Assisted Reproductive Technology and Embryonic Development, Wuhan University, Wuhan, China
| | - Li-Quan Zhou
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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6
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Zou W, Ji D, Zhang Z, Yang L, Cao Y. Players in Mitochondrial Dynamics and Female Reproduction. Front Mol Biosci 2021; 8:717328. [PMID: 34708072 PMCID: PMC8542886 DOI: 10.3389/fmolb.2021.717328] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 09/07/2021] [Indexed: 01/16/2023] Open
Abstract
Mitochondrial dynamics (fission and fusion) are essential physiological processes for mitochondrial metabolic function, mitochondrial redistribution, and mitochondrial quality control. Various proteins are involved in regulating mitochondrial dynamics. Aberrant expression of these proteins interferes with mitochondrial dynamics and induces a range of diseases. Multiple therapeutic approaches have been developed to treat the related diseases in recent years, but their curative effects are limited. Meanwhile, the role of mitochondrial dynamics in female reproductive function has attracted progressively more attention, including oocyte development and maturation, fertilization, and embryonic development. Here, we reviewed the significance of mitochondrial dynamics, proteins involved in mitochondrial dynamics, and disorders resulting from primary mitochondrial dynamic dysfunction. We summarized the latest therapeutic approaches of hereditary mitochondrial fusion-fission abnormalities and reviewed the recent advances in female reproductive mitochondrial dynamics.
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Affiliation(s)
- Weiwei Zou
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), Hefei, China.,Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, Hefei, China
| | - Dongmei Ji
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Province Key Laboratory of Reproductive Health and Genetics, Hefei, China.,Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, Hefei, China
| | - Zhiguo Zhang
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Anhui Province Key Laboratory of Reproductive Health and Genetics, Hefei, China.,Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, Hefei, China
| | - Li Yang
- Department of Pediatrics, Xiangya Hospital, Central South University, Changsha, China
| | - Yunxia Cao
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), Hefei, China.,Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, Hefei, China
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7
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Molecular Dysfunctions of Mitochondria-Associated Membranes (MAMs) in Alzheimer's Disease. Int J Mol Sci 2020; 21:ijms21249521. [PMID: 33327665 PMCID: PMC7765134 DOI: 10.3390/ijms21249521] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/04/2020] [Accepted: 12/08/2020] [Indexed: 02/07/2023] Open
Abstract
Alzheimer’s disease (AD) is a multifactorial neurodegenerative pathology characterized by a progressive decline of cognitive functions. Alteration of various signaling cascades affecting distinct subcellular compartment functions and their communication likely contribute to AD progression. Among others, the alteration of the physical association between the endoplasmic reticulum (ER) and mitochondria, also referred as mitochondria-associated membranes (MAMs), impacts various cellular housekeeping functions such as phospholipids-, glucose-, cholesterol-, and fatty-acid-metabolism, as well as calcium signaling, which are all altered in AD. Our review describes the physical and functional proteome crosstalk between the ER and mitochondria and highlights the contribution of distinct molecular components of MAMs to mitochondrial and ER dysfunctions in AD progression. We also discuss potential strategies targeting MAMs to improve mitochondria and ER functions in AD.
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8
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Park MR, Hwang IS, Kwak TU, Lim JH, Hwang S, Cho SK. Low expression of mitofusin 1 is associated with mitochondrial dysfunction and apoptosis in porcine somatic cell nuclear transfer embryos. Anim Sci J 2020; 91:e13430. [PMID: 32677174 DOI: 10.1111/asj.13430] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 04/01/2020] [Accepted: 06/08/2020] [Indexed: 10/23/2022]
Abstract
Mitochondria are necessary for the transition from oocyte to embryo and for early embryonic development. Mitofusin 1 is the main mediator of mitochondrial fusion and homeostasis. We investigated Mitofusin 1 expression levels in porcine somatic cell nuclear transfer (SCNT) embryos. The rate of blastocyst formation in SCNT embryos was reduced significantly compared with that of parthenogenetic activation embryos. SCNT embryos showed significantly decreased Mitofusin 1 expression and mitochondrial membrane potential, while exhibiting increased reactive oxygen species and apoptosis. Mitochondrial functional changes were observed in the SCNT embryos and may be correlated with low levels of Mitofusin 1 to negatively affect development.
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Affiliation(s)
- Mi-Ryung Park
- Animal Biotechnology Division, National Institute of Animal Science, Rural Development Administration, Wanju-gun, Republic of Korea
| | - In-Sul Hwang
- Animal Biotechnology Division, National Institute of Animal Science, Rural Development Administration, Wanju-gun, Republic of Korea
| | - Tae-Uk Kwak
- Animal Biotechnology Division, National Institute of Animal Science, Rural Development Administration, Wanju-gun, Republic of Korea
| | - Ji-Hyun Lim
- Animal Biotechnology Division, National Institute of Animal Science, Rural Development Administration, Wanju-gun, Republic of Korea
| | - Seongsoo Hwang
- Animal Biotechnology Division, National Institute of Animal Science, Rural Development Administration, Wanju-gun, Republic of Korea
| | - Seong-Keun Cho
- Department of Animal Science, Life and Industry Convergence Research Institute (RICRI), College of Natural Science, Pusan University, Miryang, Gyeongnam, Republic of Korea
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9
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Harvey AJ. Mitochondria in early development: linking the microenvironment, metabolism and the epigenome. Reproduction 2020; 157:R159-R179. [PMID: 30870807 DOI: 10.1530/rep-18-0431] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 02/04/2019] [Indexed: 12/24/2022]
Abstract
Mitochondria, originally of bacterial origin, are highly dynamic organelles that have evolved a symbiotic relationship within eukaryotic cells. Mitochondria undergo dynamic, stage-specific restructuring and redistribution during oocyte maturation and preimplantation embryo development, necessary to support key developmental events. Mitochondria also fulfil a wide range of functions beyond ATP synthesis, including the production of intracellular reactive oxygen species and calcium regulation, and are active participants in the regulation of signal transduction pathways. Communication between not only mitochondria and the nucleus, but also with other organelles, is emerging as a critical function which regulates preimplantation development. Significantly, perturbations and deficits in mitochondrial function manifest not only as reduced quality and/or poor oocyte and embryo development but contribute to post-implantation failure, long-term cell function and adult disease. A growing body of evidence indicates that altered availability of metabolic co-factors modulate the activity of epigenetic modifiers, such that oocyte and embryo mitochondrial activity and dynamics have the capacity to establish long-lasting alterations to the epigenetic landscape. It is proposed that preimplantation embryo development may represent a sensitive window during which epigenetic regulation by mitochondria is likely to have significant short- and long-term effects on embryo, and offspring, health. Hence, mitochondrial integrity, communication and metabolism are critical links between the environment, the epigenome and the regulation of embryo development.
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Affiliation(s)
- Alexandra J Harvey
- School of BioSciences, University of Melbourne, Parkville, Victoria, Australia
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10
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Dai W, Wang G, Chwa J, Oh ME, Abeywardana T, Yang Y, Wang QA, Jiang L. Mitochondrial division inhibitor (mdivi-1) decreases oxidative metabolism in cancer. Br J Cancer 2020; 122:1288-1297. [PMID: 32147668 PMCID: PMC7188673 DOI: 10.1038/s41416-020-0778-x] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 01/31/2020] [Accepted: 02/18/2020] [Indexed: 12/22/2022] Open
Abstract
Background Previous studies suggested that mdivi-1 (mitochondrial division inhibitor), a putative inhibitor of dynamin-related protein (DRP1), decreased cancer cell proliferation through inducing mitochondrial fusion and altering oxygen consumption. However, the metabolic reprogramming underlying the DRP1 inhibition is still unclear in cancer cells. Methods To better understand the metabolic effect of DRP1 inhibition, [U-13C]glucose isotope tracing was employed to assess mdivi-1 effects in several cancer cell lines, DRP1-WT (wild-type) and DRP1-KO (knockout) H460 lung cancer cells and mouse embryonic fibroblasts (MEFs). Results Mitochondrial staining confirmed that mdivi-1 treatment and DRP1 deficiency induced mitochondrial fusion. Surprisingly, metabolic isotope tracing found that mdivi-1 decreased mitochondrial oxidative metabolism in the lung cancer cell lines H460, A549 and the colon cancer cell line HCT116. [U-13C]glucose tracing studies also showed that the TCA cycle intermediates had significantly lower enrichment in mdivi-1-treated cells. In comparison, DRP1-WT and DRP1-KO H460 cells had similar oxidative metabolism, which was decreased by mdivi-1 treatment. Furthermore, mdivi-1-mediated effects on oxidative metabolism were independent of mitochondrial fusion. Conclusions Our data suggest that, in cancer cells, mdivi-1, a putative inhibitor of DRP1, decreases oxidative metabolism to impair cell proliferation.
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Affiliation(s)
- Wenting Dai
- Department of Molecular and Cellular Endocrinology, Diabetes and Metabolism Research Institute, City of Hope Medical Center, Duarte, CA, 91010, USA
| | - Guan Wang
- Department of Molecular and Cellular Endocrinology, Diabetes and Metabolism Research Institute, City of Hope Medical Center, Duarte, CA, 91010, USA
| | - Jason Chwa
- Department of Molecular and Cellular Endocrinology, Diabetes and Metabolism Research Institute, City of Hope Medical Center, Duarte, CA, 91010, USA
| | - Myung Eun Oh
- Department of Molecular and Cellular Endocrinology, Diabetes and Metabolism Research Institute, City of Hope Medical Center, Duarte, CA, 91010, USA
| | - Tharindumala Abeywardana
- Departments of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope Medical Center, Duarte, CA, 91010, USA
| | - Yanzhong Yang
- Departments of Cancer Genetics and Epigenetics, Beckman Research Institute, City of Hope Medical Center, Duarte, CA, 91010, USA
| | - Qiong A Wang
- Department of Molecular and Cellular Endocrinology, Diabetes and Metabolism Research Institute, City of Hope Medical Center, Duarte, CA, 91010, USA.,Comprehensive Cancer Center, City of Hope Medical Center, Duarte, CA, 91010, USA
| | - Lei Jiang
- Department of Molecular and Cellular Endocrinology, Diabetes and Metabolism Research Institute, City of Hope Medical Center, Duarte, CA, 91010, USA. .,Comprehensive Cancer Center, City of Hope Medical Center, Duarte, CA, 91010, USA.
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11
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Feng ST, Wang ZZ, Yuan YH, Wang XL, Sun HM, Chen NH, Zhang Y. Dynamin-related protein 1: A protein critical for mitochondrial fission, mitophagy, and neuronal death in Parkinson’s disease. Pharmacol Res 2020; 151:104553. [DOI: 10.1016/j.phrs.2019.104553] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 11/14/2019] [Accepted: 11/16/2019] [Indexed: 01/14/2023]
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12
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Mitochondrial dynamics in exercise physiology. Pflugers Arch 2019; 472:137-153. [DOI: 10.1007/s00424-019-02258-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Accepted: 01/17/2019] [Indexed: 12/11/2022]
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13
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Joshi AU, Mochly-Rosen D. Mortal engines: Mitochondrial bioenergetics and dysfunction in neurodegenerative diseases. Pharmacol Res 2018; 138:2-15. [PMID: 30144530 DOI: 10.1016/j.phrs.2018.08.010] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 08/06/2018] [Accepted: 08/13/2018] [Indexed: 12/14/2022]
Abstract
Mitochondria are best known for their role in ATP generation. However, studies over the past two decades have shown that mitochondria do much more than that. Mitochondria regulate both necrotic and apoptotic cell death pathways, they store and therefore coordinate cellular Ca2+ signaling, they generate and metabolize important building blocks, by-products and signaling molecules, and they also generate and are targets of free radical species that modulate many aspects of cell physiology and pathology. Most estimates suggest that although the brain makes up only 2 percent of body weight, utilizes about 20 percent of the body's total ATP. Thus, mitochondrial dysfunction greatly impacts brain functions and is indeed associated with numerous neurodegenerative diseases. Furthermore, a number of abnormal disease-associated proteins have been shown to interact directly with mitochondria, leading to mitochondrial dysfunction and subsequent neuronal cell death. Here, we discuss the role of mitochondrial dynamics impairment in the pathological processes associated with neurodegeneration and suggest that a therapy targeting mitochondrialdysfunction holds a great promise.
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Affiliation(s)
- Amit U Joshi
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, CA, 94305-5174, USA
| | - Daria Mochly-Rosen
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, CA, 94305-5174, USA.
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14
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Yang SG, Park HJ, Kim JW, Jung JM, Kim MJ, Jegal HG, Kim IS, Kang MJ, Wee G, Yang HY, Lee YH, Seo JH, Kim SU, Koo DB. Mito-TEMPO improves development competence by reducing superoxide in preimplantation porcine embryos. Sci Rep 2018; 8:10130. [PMID: 29973637 PMCID: PMC6031607 DOI: 10.1038/s41598-018-28497-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 05/22/2018] [Indexed: 12/26/2022] Open
Abstract
Mito-TEMPO is a well-known mitochondria-specific superoxide scavenger. However, the effect of Mito-TEMPO on porcine embryo development, to our knowledge, has not been studied yet. In the present study, porcine embryos were classified into two groups (G1 and G2) based on the cytoplasm lipid contents at the zygote stage. The development of blastocysts derived from G2 zygotes was reduced (G2:16.2 ± 7.9% vs G1: 26.5 ± 5.9%; 1.6-fold, p < 0.05) compared to those from G1 zygotes. In G2 embryos, the proportion of TUNEL-positive cells was also higher than that of G1 embryos. Superoxide in G2 embryos was significantly increased compared to that in G1 embryos. Mitochondrial membrane potential and ATP production were lower in G2 embryos than in G1 embryos. Phosphorylation of Drp1 at Ser 616 increased in G1 embryos during the cleavage stages compared to that in the zygote but was not significantly different in G2 embryos. Then, the effects of Mito-TEMPO were investigated in G2 embryos. Blastocyst formation rate (G2: 19.1 ± 5.1% vs G2 + Mito-TEMPO: 28.8 ± 4.0%; 1.5-fold, p < 0.05) and mitochondrial aggregation were recovered after superoxide reduction by Mito-TEMPO treatment. Thus, we showed that Mito-TEMPO improves blastocyst development by superoxide reduction in porcine embryos in vitro.
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Affiliation(s)
- Seul-Gi Yang
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea
| | - Hyo-Jin Park
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea
| | - Jin-Woo Kim
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea
| | - Jae-Min Jung
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea
| | - Min-Ji Kim
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea
| | - Ho-Guen Jegal
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea
| | - In-Su Kim
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea
| | - Man-Jong Kang
- Department of Animal Science, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Gabbine Wee
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), 80 Cheombok-ro, Dong-gu, Daegu, 41061, Republic of Korea
| | - Hee-Young Yang
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), 80 Cheombok-ro, Dong-gu, Daegu, 41061, Republic of Korea
| | - Yun-Han Lee
- Department of Molecular Medicine, Keimyung University School of Medicine, Daegu, 42601, Republic of Korea
| | - Ji-Hae Seo
- Department of Biochemistry, Keimyung University School of Medicine, Daegu, 42601, Republic of Korea
| | - Sun-Uk Kim
- National Primate Research Center & Futuristic Animal Resource and Research Center, Korea Research Institute of Bioscience and Biotechnology, Ochang, Chungbuk, 28116, Republic of Korea
| | - Deog-Bon Koo
- Department of Biotechnology, College of Engineering, Daegu University, 201 Daegudae-ro, Jillyang, Gyeongsan, Gyeongbuk, 38453, Republic of Korea.
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15
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Eirin A, Lerman A, Lerman LO. The Emerging Role of Mitochondrial Targeting in Kidney Disease. Handb Exp Pharmacol 2017; 240:229-250. [PMID: 27316914 DOI: 10.1007/164_2016_6] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Renal disease affects millions of people worldwide, imposing an enormous financial burden for health-care systems. Recent evidence suggests that mitochondria play an important role in the pathogenesis of different forms of renal disease, including genetic defects, acute kidney injury, chronic kidney disease, aging, renal tumors, and transplant nephropathy. Renal mitochondrial abnormalities and dysfunction affect several cellular pathways, leading to increased oxidative stress, apoptosis, microvascular loss, and fibrosis, all of which compromise renal function. Over recent years, compounds that specifically target mitochondria have emerged as promising therapeutic options for patients with renal disease. Although the most compelling evidence is based on preclinical studies, several compounds are currently being tested in clinical trials. This chapter provides an overview of the involvement of mitochondrial dysfunction in renal disease and summarizes the current knowledge on mitochondria-targeted strategies to attenuate renal disease.
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Affiliation(s)
- Alfonso Eirin
- Division of Nephrology and Hypertension, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Amir Lerman
- Division of Cardiovascular Diseases, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Lilach O Lerman
- Division of Nephrology and Hypertension, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA. .,Division of Cardiovascular Diseases, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.
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16
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Rosdah AA, Bond ST, Sivakumaran P, Hoque A, Oakhill JS, Drew BG, Delbridge LMD, Lim SY. Mdivi-1 Protects Human W8B2 + Cardiac Stem Cells from Oxidative Stress and Simulated Ischemia-Reperfusion Injury. Stem Cells Dev 2017; 26:1771-1780. [PMID: 29054138 DOI: 10.1089/scd.2017.0157] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Cardiac stem cell (CSC) therapy is a promising approach to treat ischemic heart disease. However, the poor survival of transplanted stem cells in the ischemic myocardium has been a major impediment in achieving an effective cell-based therapy against myocardial infarction. Inhibiting mitochondrial fission has been shown to promote survival of several cell types. However, the role of mitochondrial morphology in survival of human CSC remains unknown. In this study, we investigated whether mitochondrial division inhibitor-1 (Mdivi-1), an inhibitor of mitochondrial fission protein dynamin-related protein-1 (Drp1), can improve survival of a novel population of human W8B2+ CSCs in hydrogen peroxide (H2O2)-induced oxidative stress and simulated ischemia-reperfusion injury models. Mdivi-1 significantly reduced H2O2-induced cell death in a dose-dependent manner. This cytoprotective effect was accompanied by an increased proportion of cells with tubular mitochondria, but independent of mitochondrial membrane potential recovery and reduction of mitochondrial superoxide production. In simulated ischemia-reperfusion injury model, Mdivi-1 given as a pretreatment or throughout ischemia-reperfusion injury significantly reduced cell death. However, the cytoprotective effect of Mdivi-1 was not observed when given at reperfusion. Moreover, the cytoprotective effect of Mdivi-1 in the simulated ischemia-reperfusion injury model was not accompanied by changes in mitochondrial morphology, mitochondrial membrane potential, or mitochondrial reactive oxygen species production. Mdivi-1 also did not affect mitochondrial bioenergetics of intact W8B2+ CSCs. Taken together, these experiments demonstrated that Mdivi-1 treatment of human W8B2+ CSCs enhances their survival and can be employed to improve therapeutic efficacy of CSCs for ischemic heart disease.
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Affiliation(s)
- Ayeshah A Rosdah
- 1 St Vincent's Institute of Medical Research , Fitzroy, Australia .,2 Department of Physiology, University of Melbourne , Melbourne, Australia .,3 Faculty of Medicine, Universitas Sriwijaya , Palembang, Indonesia
| | - Simon T Bond
- 4 Molecular Metabolism and Ageing Laboratory, Baker Heart and Diabetes Institute , Melbourne, Australia
| | | | - Ashfaqul Hoque
- 1 St Vincent's Institute of Medical Research , Fitzroy, Australia
| | - Jonathan S Oakhill
- 1 St Vincent's Institute of Medical Research , Fitzroy, Australia .,5 Mary MacKillop Institute for Health Research, Australian Catholic University , Melbourne, Australia
| | - Brian G Drew
- 4 Molecular Metabolism and Ageing Laboratory, Baker Heart and Diabetes Institute , Melbourne, Australia
| | - Lea M D Delbridge
- 2 Department of Physiology, University of Melbourne , Melbourne, Australia
| | - Shiang Y Lim
- 1 St Vincent's Institute of Medical Research , Fitzroy, Australia .,6 Department of Surgery, University of Melbourne , Melbourne, Australia
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17
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Zhao G, Cao K, Xu C, Sun A, Lu W, Zheng Y, Li H, Hong G, Wu B, Qiu Q, Lu Z. Crosstalk between Mitochondrial Fission and Oxidative Stress in Paraquat-Induced Apoptosis in Mouse Alveolar Type II Cells. Int J Biol Sci 2017; 13:888-900. [PMID: 28808421 PMCID: PMC5555106 DOI: 10.7150/ijbs.18468] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 03/10/2017] [Indexed: 01/04/2023] Open
Abstract
Paraquat (PQ), as a highly effective and nonselective herbicide, induces cell apoptosis through generation of superoxide anions which forms reactive oxygen species (ROS). Mitochondria, as regulators for cellular redox signaling, have been proved to play an important role in PQ-induced cell apoptosis. This study aimed to evaluate whether and how mitochondrial fission interacts with oxidative stress in PQ-induced apoptosis in mouse alveolar type II (AT-II) cells. Firstly, we demonstrated that PQ promoted apoptosis and release of cytochrome-c (Cyt-c). Furthermore, we showed that PQ broke down mitochondrial network, enhanced the expression of fission-related proteins, increased Drp1 mitochondrial translocation while decreased the expression of fusion-related proteins in AT-II cells. Besides, inhibiting mitochondrial fission using mdivi-1, a selective inhibitor of Drp1, markedly attenuated PQ-induced apoptosis, release of Cyt-c and the generation of ROS. These results indicate that mitochondrial fission involves in PQ-induced apoptosis. Further study demonstrated that antioxidant ascorbic acid inhibited Drp1 mitochondrial translocation, mitochondrial fission and attenuated PQ-induced apoptosis. Overall, our findings suggest that mitochondrial fission interplays with ROS in PQ-induced apoptosis in mouse AT-II cells and mitochondrial fission could serve as a potential therapeutic target in PQ poisoning.
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Affiliation(s)
- Guangju Zhao
- Emergency Department, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.,Wenzhou Municipal Key Laboratory of Emergency, Critical care, and Disaster Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
| | - Kaiqiang Cao
- Emergency Department, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.,Wenzhou Municipal Key Laboratory of Emergency, Critical care, and Disaster Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
| | - Changqin Xu
- Emergency Department, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.,Wenzhou Municipal Key Laboratory of Emergency, Critical care, and Disaster Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
| | - Aifang Sun
- Emergency Department, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
| | - Wang Lu
- Emergency Department, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
| | - Yi Zheng
- Department of Microbiology and immunology, School of Laboratory Medicine, Wenzhou Medical University, Wenzhou 325000, China.,Key Lab of Laboratory Medicine, Ministry of Education of China, Wenzhou 325000, China
| | - Haixiao Li
- Emergency Department, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.,Wenzhou Municipal Key Laboratory of Emergency, Critical care, and Disaster Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
| | - Guangliang Hong
- Emergency Department, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.,Wenzhou Municipal Key Laboratory of Emergency, Critical care, and Disaster Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
| | - Bing Wu
- Emergency Department, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
| | - Qiaomeng Qiu
- Emergency Department, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
| | - Zhongqiu Lu
- Emergency Department, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.,Wenzhou Municipal Key Laboratory of Emergency, Critical care, and Disaster Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
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18
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Ahn JH, Park HJ, Kim JW, Park JY, Park SY, Yang SG, Kim CH, Yoon SB, Kim SU, Chang KT, Koo DB. Tyrphostin A9 improves blastocyst development in porcine embryos through induction of dynamin-related protein 1-dependent mitochondrial fission. Mitochondrion 2017; 35:80-86. [DOI: 10.1016/j.mito.2017.05.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 03/10/2017] [Accepted: 05/17/2017] [Indexed: 12/30/2022]
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19
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Hou Y, Kitaguchi T, Kriszt R, Tseng YH, Raghunath M, Suzuki M. Ca 2+-associated triphasic pH changes in mitochondria during brown adipocyte activation. Mol Metab 2017; 6:797-808. [PMID: 28752044 PMCID: PMC5518710 DOI: 10.1016/j.molmet.2017.05.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 05/19/2017] [Accepted: 05/25/2017] [Indexed: 12/31/2022] Open
Abstract
Objective Brown adipocytes (BAs) are endowed with a high metabolic capacity for energy expenditure due to their high mitochondria content. While mitochondrial pH is dynamically regulated in response to stimulation and, in return, affects various metabolic processes, how mitochondrial pH is regulated during adrenergic stimulation-induced thermogenesis is unknown. We aimed to reveal the spatial and temporal dynamics of mitochondrial pH in stimulated BAs and the mechanisms behind the dynamic pH changes. Methods A mitochondrial targeted pH-sensitive protein, mito-pHluorin, was constructed and transfected to BAs. Transfected BAs were stimulated by an adrenergic agonist, isoproterenol. The pH changes in mitochondria were characterized by dual-color imaging with indicators that monitor mitochondrial membrane potential and heat production. The mechanisms of pH changes were studied by examining the involvement of electron transport chain (ETC) activity and Ca2+ profiles in mitochondria and the intracellular Ca2+ store, the endoplasmic reticulum (ER). Results A triphasic mitochondrial pH change in BAs upon adrenergic stimulation was revealed. In comparison to a thermosensitive dye, we reveal that phases 1 and 2 of the pH increase precede thermogenesis, while phase 3, characterized by a pH decrease, occurs during thermogenesis. The mechanism of pH increase is partially related to ETC. In addition, the pH increase occurs concurrently with an increase in mitochondrial Ca2+. This Ca2+ increase is contributed to by an influx from the ER, and it is further involved in mitochondrial pH regulation. Conclusions We demonstrate that an increase in mitochondrial pH is implicated as an early event in adrenergically stimulated BAs. We further suggest that this pH increase may play a role in the potentiation of thermogenesis. A triphasic mitochondrial pH changes in adrenergically stimulated BAs was revealed. Phases 1 and 2 of the pH increase precede thermogenesis. The pH increase is partially related to electron transport chain activity. Ca2+ was transmitted from endoplasmic reticulum to mitochondria during phase 1. The transmitted Ca2+ regulates pH increase in mitochondria.
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Key Words
- AMA, antimycin A
- BAs, brown adipocytes
- Brown adipocytes
- Ca2+
- Confocal microscopy
- EGTA, ethylene glycol tetraacetic acid
- ER, endoplasmic reticulum
- ETC, electron transport chain
- Endoplasmic reticulum
- FFAs, free fatty acids
- Fluorescence imaging
- IMS, intermembrane space
- ISO, isoproterenol
- MAM, mitochondria-associated ER membrane
- MCU, mitochondrial calcium uniporter
- Mitochondria-associated ER membrane
- Rot, rotenone
- SERCA, sarco/endoplasmic reticulum Ca2+-ATPase
- TG, thapsigargin
- TMRM, tetramethylrhodamine methyl ester
- UCP1, uncoupling protein 1
- β-AR, β-adrenergic receptor
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Affiliation(s)
- Yanyan Hou
- WASEDA Bioscience Research Institute in Singapore (WABIOS), 11 Biopolis Way, #05-02 Helios, Singapore 138667, Singapore
| | - Tetsuya Kitaguchi
- WASEDA Bioscience Research Institute in Singapore (WABIOS), 11 Biopolis Way, #05-02 Helios, Singapore 138667, Singapore; Comprehensive Research Organization, Waseda University, Tokyo, 162-0041, Japan
| | - Rókus Kriszt
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore; NUS Tissue Engineering Program, Life Sciences Institute, National University of Singapore, 117510, Singapore; Graduate School for Integrative Sciences and Engineering (NGS), National University of Singapore, 117456, Singapore
| | - Yu-Hua Tseng
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
| | - Michael Raghunath
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore; NUS Tissue Engineering Program, Life Sciences Institute, National University of Singapore, 117510, Singapore; Department of Biochemistry, Yong Loo Ling School of Medicine, National University of Singapore, 117597, Singapore
| | - Madoka Suzuki
- WASEDA Bioscience Research Institute in Singapore (WABIOS), 11 Biopolis Way, #05-02 Helios, Singapore 138667, Singapore; Comprehensive Research Organization, Waseda University, Tokyo, 162-0041, Japan; PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.
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20
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Lee WC, Chiu CH, Chen JB, Chen CH, Chang HW. Mitochondrial Fission Increases Apoptosis and Decreases Autophagy in Renal Proximal Tubular Epithelial Cells Treated with High Glucose. DNA Cell Biol 2016; 35:657-665. [PMID: 27420408 DOI: 10.1089/dna.2016.3261] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The aim of this study was to examine the effect of mitochondrial morphogenesis changes on apoptosis and autophagy of high-glucose-treated proximal tubular epithelial cells (HK2). Cell viability, apoptosis, and mitochondrial morphogenesis were examined using crystal violet, terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling (TUNEL), and mitotracker staining, respectively. High glucose inhibited cell viability and induced mitochondrial fission in HK2 cells. After depleting mitofusin 1 (MFN1), the MFN1(-) HK2 cells (fission type) became more susceptible to high-glucose-induced apoptosis and mitochondrial fragmentation observed by TUNEL and mitotracker assays. In siMFN2 HK2 cells (fission type), mitochondria were highly fragmented (>80% fission rate) with or without high-glucose treatment; however, siFIS1 (mitochondrial fission protein 1) HK2 cells (fusion type) exhibited little fragmentation (<13%). High-glucose treatment induced autophagy, characterized by the formation of autophagosome and microtubule-associated protein light chain 3 (LC3) B-II, as observed by transmission electron microscopy and western blotting, respectively. LC3B-II levels decreased in both MFN1(-) and siMFN2 HK2 cells, but increased in siFIS1 HK2 cells. Moreover, autophagy displays a protective role against high-glucose-induced cell death based on cotreatment with autophagy inhibitors (3-methyladenine and chloroquine). Mitochondrial fission may increase apoptosis and decrease autophagy of high-glucose-treated HK2 cells.
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Affiliation(s)
- Wen-Chin Lee
- 1 Mitochondrial Research Unit, Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine , Kaohsiung, Taiwan
| | - Chien-Hua Chiu
- 1 Mitochondrial Research Unit, Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine , Kaohsiung, Taiwan
| | - Jin-Bor Chen
- 1 Mitochondrial Research Unit, Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine , Kaohsiung, Taiwan
| | - Chiu-Hua Chen
- 1 Mitochondrial Research Unit, Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine , Kaohsiung, Taiwan .,2 Department of Biological Sciences, National Sun Yat-Sen University , Kaohsiung, Taiwan
| | - Hsueh-Wei Chang
- 3 Institute of Medical Science and Technology, National Sun Yat-Sen University , Kaohsiung, Taiwan .,4 Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University , Kaohsiung, Taiwan
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21
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Joshi AU, Kornfeld OS, Mochly-Rosen D. The entangled ER-mitochondrial axis as a potential therapeutic strategy in neurodegeneration: A tangled duo unchained. Cell Calcium 2016; 60:218-34. [PMID: 27212603 DOI: 10.1016/j.ceca.2016.04.010] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 04/28/2016] [Accepted: 04/28/2016] [Indexed: 12/12/2022]
Abstract
Endoplasmic reticulum (ER) and mitochondrial function have both been shown to be critical events in neurodegenerative diseases. The ER mediates protein folding, maturation, sorting as well acts as calcium storage. The unfolded protein response (UPR) is a stress response of the ER that is activated by the accumulation of misfolded proteins within the ER lumen. Although the molecular mechanisms underlying ER stress-induced apoptosis are not completely understood, increasing evidence suggests that ER and mitochondria cooperate to signal cell death. Similarly, calcium-mediated mitochondrial function and dynamics not only contribute to ATP generation and calcium buffering but are also a linchpin in mediating cell fate. Mitochondria and ER form structural and functional networks (mitochondria-associated ER membranes [MAMs]) essential to maintaining cellular homeostasis and determining cell fate under various pathophysiological conditions. Regulated Ca(2+) transfer from the ER to the mitochondria is important in maintaining control of pro-survival/pro-death pathways. In this review, we summarize the latest therapeutic strategies that target these essential organelles in the context of neurodegenerative diseases.
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Affiliation(s)
- Amit U Joshi
- Department of Chemical & Systems Biology, School of Medicine, Stanford University, CA, USA
| | - Opher S Kornfeld
- Department of Chemical & Systems Biology, School of Medicine, Stanford University, CA, USA
| | - Daria Mochly-Rosen
- Department of Chemical & Systems Biology, School of Medicine, Stanford University, CA, USA.
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22
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Jheng HF, Huang SH, Kuo HM, Hughes MW, Tsai YS. Molecular insight and pharmacological approaches targeting mitochondrial dynamics in skeletal muscle during obesity. Ann N Y Acad Sci 2015; 1350:82-94. [PMID: 26301786 DOI: 10.1111/nyas.12863] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Obesity-associated insulin resistance is the major characteristic of the early stage of metabolic syndrome. A decline in mitochondrial function plays a role in the development of insulin resistance in obesity and type 2 diabetes. Accumulating data reveal that mitochondrial dynamics, the balance between mitochondrial fusion and fission, are an important factor in the maintenance of mitochondrial function. Thus, the mechanisms underlying the regulation of mitochondrial dynamics in obesity deserve further investigation. This review describes an overview of mitochondrial fusion and fission machineries, and discusses the mechanistic and functional aspects of mitochondrial dynamics, with a focus on skeletal muscle in obesity. Finally, we discuss current pharmacological approaches of targeting mitochondrial dynamics. Elucidating the role of mitochondrial dynamics in skeletal muscle afflicted by obesity may provide not only important clues in understanding muscle insulin resistance, but also new therapeutic targets.
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Affiliation(s)
| | | | | | - Michael W Hughes
- Institute of Clinical Medicine.,International Research Center of Wound Repair and Regeneration
| | - Yau-Sheng Tsai
- Institute of Clinical Medicine.,Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan, Republic of China
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23
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Kornfeld OS, Hwang S, Disatnik MH, Chen CH, Qvit N, Mochly-Rosen D. Mitochondrial reactive oxygen species at the heart of the matter: new therapeutic approaches for cardiovascular diseases. Circ Res 2015; 116:1783-99. [PMID: 25999419 DOI: 10.1161/circresaha.116.305432] [Citation(s) in RCA: 139] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Reactive oxygen species (ROS) have been implicated in a variety of age-related diseases, including multiple cardiovascular disorders. However, translation of ROS scavengers (antioxidants) into the clinic has not been successful. These antioxidants grossly reduce total levels of cellular ROS including ROS that participate in physiological signaling. In this review, we challenge the traditional antioxidant therapeutic approach that targets ROS directly with novel approaches that improve mitochondrial functions to more effectively treat cardiovascular diseases.
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Affiliation(s)
- Opher S Kornfeld
- From the Department of Chemical and Systems Biology, Stanford University School of Medicine, CA
| | - Sunhee Hwang
- From the Department of Chemical and Systems Biology, Stanford University School of Medicine, CA
| | - Marie-Hélène Disatnik
- From the Department of Chemical and Systems Biology, Stanford University School of Medicine, CA
| | - Che-Hong Chen
- From the Department of Chemical and Systems Biology, Stanford University School of Medicine, CA
| | - Nir Qvit
- From the Department of Chemical and Systems Biology, Stanford University School of Medicine, CA
| | - Daria Mochly-Rosen
- From the Department of Chemical and Systems Biology, Stanford University School of Medicine, CA.
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