1
|
Silva Pedroza AA, Bernardo EM, Pereira AR, Andrade Silva SC, Lima TA, de Moura Freitas C, da Silva Junior JC, Gomes DA, Ferreira DS, Lagranha CJ. Moderate offspring exercise offsets the harmful effects of maternal protein deprivation on mitochondrial function and oxidative balance by modulating sirtuins. Nutr Metab Cardiovasc Dis 2021; 31:1622-1634. [PMID: 33810953 DOI: 10.1016/j.numecd.2021.01.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 12/20/2020] [Accepted: 01/08/2021] [Indexed: 12/30/2022]
Abstract
BACKGROUND AND AIMS It has been demonstrated that maternal low protein during development induces mitochondrial dysfunction and oxidative stress in the heart. Moderate-intensity exercise in early life, conversely, increases the overall cardiac health. Thus, we hypothesize that moderate-intensity exercise performed during young age could ameliorate the deleterious effect of maternal protein deprivation on cardiac bioenergetics. METHODS AND RESULTS We used a rat model of maternal protein restriction during gestational and lactation period followed by an offspring treadmill moderate physical training. Pregnant rats were divided into two groups: normal nutrition receiving 17% of casein in the diet and undernutrition receiving a low-protein diet (8% casein). At 30 days of age, the male offspring were further subdivided into sedentary (NS and LS) or exercised (NT and LT) groups. Treadmill exercise was performed as follows: 4 weeks, 5 days/week, 60 min/day at 50% of maximal running capacity. Our results showed that a low-protein diet decreases oxidative metabolism and mitochondrial function associated with higher oxidative stress. In contrast, exercise rescues mitochondrial capacity and promotes a cellular resilience to oxidative stress. Up-regulation of cardiac sirtuin 1 and 3 decreased acetylation levels, redeeming from the deleterious effect of protein restriction. CONCLUSION Our findings show that moderate daily exercise during a young age acts as a therapeutical intervention opposing the harmful effects of a maternal diet restricted in protein.
Collapse
Affiliation(s)
| | - Elenilson M Bernardo
- Biochemistry and Physiology Graduate Program, Federal University of Pernambuco, Recife, PE, Brazil
| | - Allifer R Pereira
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV- Federal University of Pernambuco, Brazil
| | - Severina Cassia Andrade Silva
- Neuropsyquiatry and Behavior Science Graduate Program, Federal University of Pernambuco-UFPE, Recife, Pernambuco, Brazil
| | - Talitta A Lima
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV- Federal University of Pernambuco, Brazil
| | - Cristiane de Moura Freitas
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV- Federal University of Pernambuco, Brazil
| | - Jose Carlos da Silva Junior
- Neuropsyquiatry and Behavior Science Graduate Program, Federal University of Pernambuco-UFPE, Recife, Pernambuco, Brazil
| | - Dayane A Gomes
- Neuropsyquiatry and Behavior Science Graduate Program, Federal University of Pernambuco-UFPE, Recife, Pernambuco, Brazil
| | - Diorginis S Ferreira
- Colegiado de Educação Física, Federal University of São Franscisco Valley, Petrolina, Brazil
| | - Claudia J Lagranha
- Biochemistry and Physiology Graduate Program, Federal University of Pernambuco, Recife, PE, Brazil; Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV- Federal University of Pernambuco, Brazil; Neuropsyquiatry and Behavior Science Graduate Program, Federal University of Pernambuco-UFPE, Recife, Pernambuco, Brazil.
| |
Collapse
|
2
|
Zhao H, Pan X. Mitochondrial Ca 2+ and cell cycle regulation. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2021; 362:171-207. [PMID: 34253295 DOI: 10.1016/bs.ircmb.2021.02.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
It has been demonstrated for more than 40 years that intracellular calcium (Ca2+) controls a variety of cellular functions, including mitochondrial metabolism and cell proliferation. Cytosolic Ca2+ fluctuation during key stages of the cell cycle can lead to mitochondrial Ca2+ uptake and subsequent activation of mitochondrial oxidative phosphorylation and a range of signaling. However, the relationship between mitochondrial Ca2+ and cell cycle progression has long been neglected because the molecule responsible for Ca2+ uptake has been unknown. Recently, the identification of the mitochondrial Ca2+ uniporter (MCU) has led to key advances. With improved Ca2+ imaging and detection, effects of MCU-mediated mitochondrial Ca2+ have been observed at different stages of the cell cycle. Elevated Ca2+ signaling boosts ATP and ROS production, remodels cytosolic Ca2+ pathways and reprograms cell fate-determining networks. These findings suggest that manipulating mitochondrial Ca2+ signaling may serve as a potential strategy in the control of many crucial biological events, such as tumor development and cell division in hematopoietic stem cells (HSCs). In this review, we summarize the current understanding of the role of mitochondrial Ca2+ signaling during different stages of the cell cycle and highlight the potential physiological and pathological significance of mitochondrial Ca2+ signaling.
Collapse
Affiliation(s)
- Haixin Zhao
- State Key Laboratory of Experimental Haematology, Institute of Hematology, Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Xin Pan
- State Key Laboratory of Proteomics, Institute of Basic Medical Sciences, National Center of Biomedical Analysis, Beijing, China.
| |
Collapse
|
3
|
Winquist RJ, Gribkoff VK. Targeting putative components of the mitochondrial permeability transition pore for novel therapeutics. Biochem Pharmacol 2020; 177:113995. [PMID: 32339494 DOI: 10.1016/j.bcp.2020.113995] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 04/22/2020] [Indexed: 12/14/2022]
Abstract
Few discoveries have influenced drug discovery programs more than the finding that mitochondrial membranes undergo swings in permeability in response to cellular perturbations. The conductor of these permeability changes is the aptly named mitochondrial permeability transition pore which, although not yet precisely defined, is comprised of several integral proteins that differentially act to regulate the flux of ions, proteins and metabolic byproducts during the course of cellular physiological functions but also pathophysiological insults. Pursuit of the pore's exact identity remains a topic of keen interest, but decades of research have unearthed provocative functions for the integral proteins leading to their evaluation to develop novel therapeutics for a wide range of clinical indications. Chief amongst these targeted, integral proteins have been the Voltage Dependent Anion Channel (VDAC) and the F1FO ATP synthase. Research associated with the roles and ligands of VDAC has been extensive and we will expand upon 3 examples of ligand:VDAC interactions for consideration of drug discovery projects: Tubulin:VDAC1, Hexokinase I/II:VDAC1 and olesoxime:VDAC1. The discoveries that cyclosporine blocks mitochondrial permeability transition via binding to cyclophilin D, and that cyclophilin D is an important component of F1FO ATP synthase, has heightened interest in the F1FO ATP synthase as a focal point for drug discovery, and we will discuss 2 plausible campaigns associated with disease indications. To date no drug has emerged from prospective targeting these integral proteins; however, continued exploration such as the approaches suggested in this Commentary will increase the likelihood of providing important therapeutics for severely unmet medical needs.
Collapse
Affiliation(s)
- Raymond J Winquist
- Alkermes Pharmaceuticals Inc, 852 Winter Street, Waltham MA 02451, United States.
| | - Valentin K Gribkoff
- Yale University School of Medicine, Department of Internal Medicine, 333 Cedar St., New Haven, CT 06510, United States; TheraStat LLC, 44 Kings Grant Rd., Weston, MA 02493, United States
| |
Collapse
|
4
|
Chen MX, Ward E, Caivano M, Toh S, Searle K, Ramachandran S, Lacroix Y, Ahmed M, Rutter AR. Probing Mitochondrial Permeability Transition Pore Activity in Nucleated Cells and Platelets by High-Throughput Screening Assays Suggests Involvement of Protein Phosphatase 2B in Mitochondrial Dynamics. Assay Drug Dev Technol 2018; 16:445-455. [PMID: 30481043 DOI: 10.1089/adt.2018.872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Mitochondrial permeability transition pore (mPTP) formation is well documented in isolated mitochondria. However, convincing detection of mPTP in whole cells remains elusive. In this study, we describe a high-throughput assay for Ca2+-activated mPTP opening in platelets using HyperCyt flow cytometry. In addition, we demonstrate that in several nucleated cells, using multiple approaches, the detection of cyclophilin D-dependent mPTP opening is highly challenging. Results with the mitochondrial-targeted Ca2+-sensing green fluorescent protein (mito-Case12) suggest the involvement of protein phosphatase 2B (PP2B; calcineurin) in regulating mitochondrial dynamics. Our results highlight the danger of relying on cyclosporine A alone as a pharmacological tool, and the need for comprehensive studies of mPTP in the cell.
Collapse
Affiliation(s)
| | - Emma Ward
- GlaxoSmithKline R&D , Stevenage, United Kingdom
| | | | - Sandy Toh
- GlaxoSmithKline R&D , Stevenage, United Kingdom
| | | | | | | | | | | |
Collapse
|
5
|
Little D, Luft C, Mosaku O, Lorvellec M, Yao Z, Paillusson S, Kriston-Vizi J, Gandhi S, Abramov AY, Ketteler R, Devine MJ, Gissen P. A single cell high content assay detects mitochondrial dysfunction in iPSC-derived neurons with mutations in SNCA. Sci Rep 2018; 8:9033. [PMID: 29899557 PMCID: PMC5998042 DOI: 10.1038/s41598-018-27058-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 05/25/2018] [Indexed: 12/21/2022] Open
Abstract
Mitochondrial dysfunction is implicated in many neurodegenerative diseases including Parkinson's disease (PD). Induced pluripotent stem cells (iPSCs) provide a unique cell model for studying neurological diseases. We have established a high-content assay that can simultaneously measure mitochondrial function, morphology and cell viability in iPSC-derived dopaminergic neurons. iPSCs from PD patients with mutations in SNCA and unaffected controls were differentiated into dopaminergic neurons, seeded in 384-well plates and stained with the mitochondrial membrane potential dependent dye TMRM, alongside Hoechst-33342 and Calcein-AM. Images were acquired using an automated confocal screening microscope and single cells were analysed using automated image analysis software. PD neurons displayed reduced mitochondrial membrane potential and altered mitochondrial morphology compared to control neurons. This assay demonstrates that high content screening techniques can be applied to the analysis of mitochondria in iPSC-derived neurons. This technique could form part of a drug discovery platform to test potential new therapeutics for PD and other neurodegenerative diseases.
Collapse
Affiliation(s)
- Daniel Little
- MRC Laboratory for Molecular Cell Biology, University College London, Gower Street, London, United Kingdom.
| | - Christin Luft
- MRC Laboratory for Molecular Cell Biology, University College London, Gower Street, London, United Kingdom
| | - Olukunbi Mosaku
- MRC Laboratory for Molecular Cell Biology, University College London, Gower Street, London, United Kingdom
| | - Maëlle Lorvellec
- MRC Laboratory for Molecular Cell Biology, University College London, Gower Street, London, United Kingdom
| | - Zhi Yao
- Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, Queen Square, London, United Kingdom
- The Francis Crick Institute, 1 Midland Road, King's Cross, London, United Kingdom
| | - Sébastien Paillusson
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, De Crespigny Park, London, United Kingdom
| | - Janos Kriston-Vizi
- MRC Laboratory for Molecular Cell Biology, University College London, Gower Street, London, United Kingdom
| | - Sonia Gandhi
- Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, Queen Square, London, United Kingdom
- The Francis Crick Institute, 1 Midland Road, King's Cross, London, United Kingdom
| | - Andrey Y Abramov
- Department of Molecular Neuroscience, University College London, Institute of Neurology, Queen Square, London, United Kingdom
| | - Robin Ketteler
- MRC Laboratory for Molecular Cell Biology, University College London, Gower Street, London, United Kingdom
| | - Michael J Devine
- MRC Laboratory for Molecular Cell Biology, University College London, Gower Street, London, United Kingdom.
- Department of Neuroscience, Physiology and Pharmacology, University College London, Gower Street, London, United Kingdom.
| | - Paul Gissen
- MRC Laboratory for Molecular Cell Biology, University College London, Gower Street, London, United Kingdom
| |
Collapse
|
6
|
Silva TLA, Braz GRF, Silva SCDA, Pedroza AADS, Freitas CDM, Ferreira DJS, da Silva AI, Lagranha CJ. Serotonin transporter inhibition during neonatal period induces sex-dependent effects on mitochondrial bioenergetics in the rat brainstem. Eur J Neurosci 2018; 48:1620-1634. [PMID: 29802653 DOI: 10.1111/ejn.13971] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 04/19/2018] [Accepted: 05/14/2018] [Indexed: 12/29/2022]
Abstract
The serotonin reuptake is mainly regulated by the serotonin transporters (SERTs), which are abundantly found in the raphe nuclei, located in the brainstem. Previous studies have shown that dysfunction in the SERT has been associated with several disorders, including depression and cardiovascular diseases. In this manuscript, we aimed to investigate how gender and the treatment with a serotonin selective reuptake inhibitor (SSRI) could affect mitochondrial bioenergetics and oxidative stress in the brainstem of male and female rats. Fluoxetine, our chosen SSRI, was used during the neonatal period (i.e., from postnatal Day 1 to postnatal Day 21-PND1 to PND21) in both male and female animals. Thereafter, experiments were conducted in adult rats (60 days old). Our results demonstrate that, during lactation, fluoxetine treatment modulates the mitochondrial bioenergetics in a sex-dependent manner, such as improving male mitochondrial function and female antioxidant capacity.
Collapse
Affiliation(s)
- Tercya Lucidi Araujo Silva
- Neuropsychiatry and Behavioral Science Graduate Program, Federal University of Pernambuco, Recife, Brazil
| | - Glauber Rudá Feitoza Braz
- Neuropsychiatry and Behavioral Science Graduate Program, Federal University of Pernambuco, Recife, Brazil
| | | | | | | | | | - Aline Isabel da Silva
- Neuropsychiatry and Behavioral Science Graduate Program, Federal University of Pernambuco, Recife, Brazil
| | - Claudia Jacques Lagranha
- Neuropsychiatry and Behavioral Science Graduate Program, Federal University of Pernambuco, Recife, Brazil
- Biochemistry and Physiology Graduate Program, Federal University of Pernambuco, Recife, Brazil
| |
Collapse
|
7
|
Lee JH, Amarsanaa K, Wu J, Jeon SC, Cui Y, Jung SC, Park DB, Kim SJ, Han SH, Kim HW, Rhyu IJ, Eun SY. Nobiletin attenuates neurotoxic mitochondrial calcium overload through K + influx and ΔΨ m across mitochondrial inner membrane. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2018; 22:311-319. [PMID: 29719453 PMCID: PMC5928344 DOI: 10.4196/kjpp.2018.22.3.311] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 01/17/2018] [Accepted: 02/22/2018] [Indexed: 11/15/2022]
Abstract
Mitochondrial calcium overload is a crucial event in determining the fate of neuronal cell survival and death, implicated in pathogenesis of neurodegenerative diseases. One of the driving forces of calcium influx into mitochondria is mitochondria membrane potential (ΔΨm). Therefore, pharmacological manipulation of ΔΨm can be a promising strategy to prevent neuronal cell death against brain insults. Based on these issues, we investigated here whether nobiletin, a Citrus polymethoxylated flavone, prevents neurotoxic neuronal calcium overload and cell death via regulating basal ΔΨm against neuronal insult in primary cortical neurons and pure brain mitochondria isolated from rat cortices. Results demonstrated that nobiletin treatment significantly increased cell viability against glutamate toxicity (100 µM, 20 min) in primary cortical neurons. Real-time imaging-based fluorometry data reveal that nobiletin evokes partial mitochondrial depolarization in these neurons. Nobiletin markedly attenuated mitochondrial calcium overload and reactive oxygen species (ROS) generation in glutamate (100 µM)-stimulated cortical neurons and isolated pure mitochondria exposed to high concentration of Ca2+ (5 µM). Nobiletin-induced partial mitochondrial depolarization in intact neurons was confirmed in isolated brain mitochondria using a fluorescence microplate reader. Nobiletin effects on basal ΔΨm were completely abolished in K+-free medium on pure isolated mitochondria. Taken together, results demonstrate that K+ influx into mitochondria is critically involved in partial mitochondrial depolarization-related neuroprotective effect of nobiletin. Nobiletin-induced mitochondrial K+ influx is probably mediated, at least in part, by activation of mitochondrial K+ channels. However, further detailed studies should be conducted to determine exact molecular targets of nobiletin in mitochondria.
Collapse
Affiliation(s)
- Ji Hyung Lee
- Department of Physiology, Jeju National University, Jeju 63243, Korea
| | - Khulan Amarsanaa
- Department of Physiology, Jeju National University, Jeju 63243, Korea
| | - Jinji Wu
- Department of Physiology, Jeju National University, Jeju 63243, Korea
| | - Sang-Chan Jeon
- Department of Physiology, Jeju National University, Jeju 63243, Korea
| | - Yanji Cui
- Department of Physiology, Jeju National University, Jeju 63243, Korea
| | - Sung-Cherl Jung
- Department of Physiology, Jeju National University, Jeju 63243, Korea.,Institute of Medical Science, Jeju National University, Jeju 63243, Korea
| | - Deok-Bae Park
- Department of Histology, Jeju National University, Jeju 63243, Korea.,Institute of Medical Science, Jeju National University, Jeju 63243, Korea
| | - Se-Jae Kim
- Department of Biology, Jeju National University, Jeju 63243, Korea
| | - Sang-Heon Han
- College of Applied Life Science SARI, Jeju National University, Jeju 63243, Korea
| | - Hyun-Wook Kim
- Department of Anatomy, College of Medicine, Korea University, Seoul 02841, Korea
| | - Im Joo Rhyu
- Department of Anatomy, College of Medicine, Korea University, Seoul 02841, Korea
| | - Su-Yong Eun
- Department of Physiology, Jeju National University, Jeju 63243, Korea.,Institute of Medical Science, Jeju National University, Jeju 63243, Korea
| |
Collapse
|
8
|
Hepel M, Stobiecka M. Supramolecular interactions of oxidative stress biomarker glutathione with fluorone black. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 192:146-152. [PMID: 29128748 DOI: 10.1016/j.saa.2017.11.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 10/24/2017] [Accepted: 11/06/2017] [Indexed: 06/07/2023]
Abstract
Oxidative stress biomarkers, including glutathione (GSH) and related compounds, are involved in a variety of interactions enabling redox potential maintenance in living cells and protection against radicals. Since the oxidative stress is promoting and, in many cases, inducing serious illnesses, monitoring of GSH levels can aid in diagnostics and disease prevention. Herein, we report on the discovery of the formation of a supramolecular ensemble of GSH with fluorone black (9-phenyl fluorone, FB) which is optically active and enables sensitive determination of GSH by resonance elastic light scattering (RELS). We have found that supramolecular interactions of GSH with FB can be probed with spectroscopic, RELS, and electrochemical methods. Our investigations show that RELS intensity for FB solutions increases with GSH concentration while fluorescence emission of FB is not affected, as quenching begins only above 0.8mM GSH. The UV-Vis difference spectra show a positive peak at 383nm and a negative peak at 458nm, indicating a higher-energy absorbing complex in comparison to the non-bonded FB host. Supramolecular interactions of FB with GSH have also been corroborated by electrochemical measurements involving two configurations of FB-GSH ensembles on electrodes: (i) an inverted orientation on Au-coated quartz crystal piezoelectrode (Au@SG-FB), with strong thiolate bonding to gold, and (ii) a non-inverted orientation on glassy carbon electrode (GCE@FB-GS), with weak π-π stacking attachment and efficient charge mediation through the ensemble. The formation of a supramolecular ensemble with hydrogen bonding has also been confirmed by quantum mechanical calculations. The discovery of supramolecular FB-GSH ensemble formation enables elucidating the mechanisms of strong RELS responses, changes in UV-Vis absorption spectra, and the electrochemical reactivity. Also, it provides new insights to the understanding of the efficient charge-transfer in redox potential homeostasis which is likely based on an intermediate formation of a similar type of supramolecular ensembles.
Collapse
Affiliation(s)
- Maria Hepel
- Department of Chemistry, State University of New York at Potsdam, Potsdam, NY 13676, USA.
| | - Magdalena Stobiecka
- Department of Chemistry, State University of New York at Potsdam, Potsdam, NY 13676, USA.
| |
Collapse
|
9
|
Ghiasi P, Hosseinkhani S, Ansari H, Aghdami N, Balalaei S, Pahlavan S, Baharvand H. Reversible permeabilization of the mitochondrial membrane promotes human cardiomyocyte differentiation from embryonic stem cells. J Cell Physiol 2018; 234:521-536. [PMID: 30071126 DOI: 10.1002/jcp.26758] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Accepted: 04/23/2018] [Indexed: 01/07/2023]
Abstract
Cell death and differentiation appear to share similar cellular features. In this study, we aimed to investigate whether differentiation and mitochondrial cell death use a common pathway. We assessed the hallmarks of apoptosis during cardiomyocyte differentiation of human embryonic stem cells and found remarkable changes in P53, reactive oxygen species, apoptotic protease-activating factor 1, poly[ADP-ribose]polymerase 1, cellular adenosine triphosphate, and mitochondrial complex I activity. Furthermore, we observed reversible mitochondrial membrane permeabilization during cardiomyocyte differentiation accompanied by reversible loss of mitochondrial membrane potential, and these changes coincided with the fluctuating patterns of cytosolic cytochrome c accumulation and subsequent caspase-9 and -3/7 activation. Moreover, the use of apoptosis inhibitors (BCL2-associated X protein [BAX] inhibitor and caspase-3/7 inhibitor) during differentiation impaired cardiomyocyte development, resulting in substantial downregulation of T, MESP1, NKX2.5, and α-MHC. Additionally, although the expression of specific differentiation markers (T, MESP1, NKX2.5, MEF2C, GATA4, and SOX17) was enhanced in doxorubicin-induced human embryonic stem cells, the stemness-specific markers (OCT4 and NANOG) showed significant downregulation. With increasing doxorubicin concentration (0.03-0.6 µM; IC50 = 0.5 µM), we observed a marked increase in the expression of mesoderm and endoderm markers. In summary, we suggest that reversible mitochondrial outer membrane permeabilization promotes cardiomyocyte differentiation through an attenuated mitochondria-mediated apoptosis-like pathway.
Collapse
Affiliation(s)
- Parisa Ghiasi
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Saman Hosseinkhani
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Hassan Ansari
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Nasser Aghdami
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Saeed Balalaei
- Department of Chemistry, K. N. Toosi University of Technology, Tehran, Iran
| | - Sara Pahlavan
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Hossein Baharvand
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
- Department of Developmental Biology, University of Science and Culture, Tehran, Iran
| |
Collapse
|
10
|
Tian L, Deng YT, Dong X, Fan JY, Li HL, Ding YM, Peng WX, Chen QX, Shen DY. Siamese crocodile bile induces apoptosis in NCI-H1299 human non-small cell lung cancer cells via a mitochondria-mediated intrinsic pathway and inhibits tumorigenesis. Mol Med Rep 2017; 15:1727-1737. [PMID: 28259903 PMCID: PMC5364959 DOI: 10.3892/mmr.2017.6211] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Accepted: 01/09/2017] [Indexed: 11/06/2022] Open
Abstract
Non-small-cell lung cancer (NSCLC) is a widespread and particularly aggressive form of cancer. Patients with NSCLC and early metastases typically have poor prognosis, highlighting the critical need for additional drugs to improve disease outcome following surgical resection. The present study aimed to determine if Siamese crocodile bile (SCB) had an anti‑cancer effect on NCI‑H1299 human NSCLC cells. The inhibitory mechanism of SCB was examined in cell culture and nude mice. In vitro experimental results revealed that SCB inhibited the proliferation and colony‑forming ability of NCI‑H1299 cells by arresting cell cycle and inducing apoptosis. The loss of the mitochondrial membrane potential and the release of cytochrome c indicated that SCB treatment may lead to mitochondrial dysfunction in NCI‑H1299 cells. At the molecular level, SCB altered the ratio of protein expression of Bax/Bcl‑2 and activated associated caspases, suggesting that intrinsic pathway involvement in the SCB‑induced apoptosis of NCI‑H1299 cells. In the in vivo experiments, intraperitoneal injection of SCB for 4 weeks inhibited xenograft tumor growth by 46.8% without observable toxicity in nude mice. Immunohistochemistry analysis of proliferating cell nuclear antigen and vascular endothelial growth factor also revealed that SCB inhibited cell proliferation and metastasis in NSCLC xenograft tumors. Overall, SCB exerted an anti-cancer effect on NCI‑H1299 human NSCLC cells in vitro and in vivo and may have therapeutic potential for the treatment of human NSCLC.
Collapse
Affiliation(s)
- Ling Tian
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, P.R. China
| | - Yi-Tao Deng
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, P.R. China
| | - Xin Dong
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, P.R. China
| | - Jia-Yi Fan
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, P.R. China
| | - Hua-Liang Li
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, P.R. China
| | - Yu-Mei Ding
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, P.R. China
| | - Wei-Xi Peng
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, P.R. China
| | - Qing-Xi Chen
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, P.R. China
| | - Dong-Yan Shen
- Center Laboratory, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, P.R. China
| |
Collapse
|
11
|
Zhang Y, Avalos JL. Traditional and novel tools to probe the mitochondrial metabolism in health and disease. WILEY INTERDISCIPLINARY REVIEWS-SYSTEMS BIOLOGY AND MEDICINE 2017; 9. [PMID: 28067471 DOI: 10.1002/wsbm.1373] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 11/07/2016] [Accepted: 11/09/2016] [Indexed: 02/06/2023]
Abstract
Mitochondrial metabolism links energy production to other essential cellular processes such as signaling, cellular differentiation, and apoptosis. In addition to producing adenosine triphosphate (ATP) as an energy source, mitochondria are responsible for the synthesis of a myriad of important metabolites and cofactors such as tetrahydrofolate, α-ketoacids, steroids, aminolevulinic acid, biotin, lipoic acid, acetyl-CoA, iron-sulfur clusters, heme, and ubiquinone. Furthermore, mitochondria and their metabolism have been implicated in aging and several human diseases, including inherited mitochondrial disorders, cardiac dysfunction, heart failure, neurodegenerative diseases, diabetes, and cancer. Therefore, there is great interest in understanding mitochondrial metabolism and the complex relationship it has with other cellular processes. A large number of studies on mitochondrial metabolism have been conducted in the last 50 years, taking a broad range of approaches. In this review, we summarize and discuss the most commonly used tools that have been used to study different aspects of the metabolism of mitochondria: ranging from dyes that monitor changes in the mitochondrial membrane potential and pharmacological tools to study respiration or ATP synthesis, to more modern tools such as genetically encoded biosensors and trans-omic approaches enabled by recent advances in mass spectrometry, computation, and other technologies. These tools have allowed the large number of studies that have shaped our current understanding of mitochondrial metabolism. WIREs Syst Biol Med 2017, 9:e1373. doi: 10.1002/wsbm.1373 For further resources related to this article, please visit the WIREs website.
Collapse
Affiliation(s)
- Yanfei Zhang
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, USA
| | - José L Avalos
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, USA.,Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ, USA.,Department of Molecular Biology, Princeton University, Princeton, NJ, USA
| |
Collapse
|
12
|
AMPK is critical for mitochondrial function during reperfusion after myocardial ischemia. J Mol Cell Cardiol 2015; 91:104-13. [PMID: 26746142 DOI: 10.1016/j.yjmcc.2015.12.032] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Revised: 12/18/2015] [Accepted: 12/29/2015] [Indexed: 02/06/2023]
Abstract
AMP-activated kinase (AMPK) is a stress responsive kinase that regulates cellular metabolism and protects against cardiomyocyte injury during ischemia-reperfusion (IR). Mitochondria play an important role in cell survival, but the specific actions of activated AMPK in maintaining mitochondrial integrity and function during reperfusion are unknown. Thus, we assessed the consequences of AMPK inactivation on heart mitochondrial function during reperfusion. Mouse hearts expressing wild type (WT) or kinase-dead (KD) AMPK were studied. Mitochondria isolated from KD hearts during reperfusion had intact membrane integrity, but demonstrated reduced oxidative capacity, increased hydrogen peroxide production and decreased resistance to mitochondrial permeability transition pore opening compared to WT. KD hearts showed increased activation of the mitogen activated protein kinase kinase 4 (MKK4) and downstream c-Jun terminal kinase (JNK) and greater necrosis during reperfusion after coronary occlusion. Transgenic expression of mitochondrial catalase (MCAT) prevented the excessive cardiac JNK activation and attenuated the increased myocardial necrosis observed during reperfusion in KD mice. Inhibition of JNK increased the resistance of KD hearts to mPTP opening, contractile dysfunction and necrosis during IR. Thus, intrinsic activation of AMPK is critical to prevent excess mitochondrial reactive oxygen production and consequent JNK signaling during reperfusion, thereby protecting against mPTP opening, irreversible mitochondrial damage and myocardial injury.
Collapse
|
13
|
Pourahmad J, Salimi A, Saharkhiz M, Motallebi A, Seydi E, Mohseni A, Nazemi M. Standardized Extract of the Persian Gulf Sponge, Axinella Sinoxea Selectively Induces Apoptosis through Mitochondria in Human Chronic Lymphocytic Leukemia Cells. ACTA ACUST UNITED AC 2015. [DOI: 10.6000/1927-7229.2015.04.04.2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
|
14
|
da Silva AI, Braz GRF, Silva-Filho R, Pedroza AA, Ferreira DS, Manhães de Castro R, Lagranha C. Effect of fluoxetine treatment on mitochondrial bioenergetics in central and peripheral rat tissues. Appl Physiol Nutr Metab 2015; 40:565-74. [DOI: 10.1139/apnm-2014-0462] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Recent investigations have focused on the mitochondrion as a direct drug target in the treatment of metabolic diseases (obesity, metabolic syndrome). Relatively few studies, however, have explicitly investigated whether drug therapies aimed at changing behavior by altering central nervous system (CNS) function affect mitochondrial bioenergetics, and none has explored their effect during early neonatal development. The present study was designed to evaluate the effects of chronic treatment of newborn male rats with the selective serotonin reuptake inhibitor fluoxetine on the mitochondrial bioenergetics of the hypothalamus and skeletal muscle during the critical nursing period of development. Male Wistar rat pups received either fluoxetine (Fx group) or vehicle solution (Ct group) from the day of birth until 21 days of age. At 60 days of age, mitochondrial bioenergetics were evaluated. The Fx group showed increased oxygen consumption in several different respiratory states and reduced production of reactive oxygen species, but there was no change in mitochondrial permeability transition pore opening or oxidative stress in either the hypothalamus or skeletal muscle. We observed an increase in glutathione S-transferase activity only in the hypothalamus of the Fx group. Taken together, our results suggest that chronic exposure to fluoxetine during the nursing phase of early rat development results in a positive modulation of mitochondrial respiration in the hypothalamus and skeletal muscle that persists into adulthood. Such long-lasting alterations in mitochondrial activity in the CNS, especially in areas regulating appetite, may contribute to permanent changes in energy balance in treated animals.
Collapse
Affiliation(s)
- Aline Isabel da Silva
- Programa de Pós-Graduação em Nutrição, Departamento de Nutrição da Universidade Federal de Pernambuco, Recife, Brazil
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV-Federal University of Pernambuco, Brazil
| | - Glauber Ruda Feitoza Braz
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV-Federal University of Pernambuco, Brazil
| | - Reginaldo Silva-Filho
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV-Federal University of Pernambuco, Brazil
| | - Anderson Apolonio Pedroza
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV-Federal University of Pernambuco, Brazil
| | - Diorginis Soares Ferreira
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV-Federal University of Pernambuco, Brazil
| | - Raul Manhães de Castro
- Programa de Pós-Graduação em Nutrição, Departamento de Nutrição da Universidade Federal de Pernambuco, Recife, Brazil
| | - Claudia Lagranha
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, CAV-Federal University of Pernambuco, Brazil
| |
Collapse
|
15
|
Lampl T, Crum JA, Davis TA, Milligan C, Del Gaizo Moore V. Isolation and functional analysis of mitochondria from cultured cells and mouse tissue. J Vis Exp 2015:52076. [PMID: 25866954 PMCID: PMC4401366 DOI: 10.3791/52076] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Comparison between two or more distinct groups, such as healthy vs. disease, is necessary to determine cellular status. Mitochondria are at the nexus of cell heath due to their role in both cell metabolism and energy production as well as control of apoptosis. Therefore, direct evaluation of isolated mitochondria and mitochondrial perturbation offers the ability to determine if organelle-specific (dys)function is occurring. The methods described in this protocol include isolation of intact, functional mitochondria from HEK cultured cells and mouse liver and spinal cord, but can be easily adapted for use with other cultured cells or animal tissues. Mitochondrial function assessed by TMRE and the use of common mitochondrial uncouplers and inhibitors in conjunction with a fluorescent plate reader allow this protocol not only to be versatile and accessible to most research laboratories, but also offers high throughput.
Collapse
Affiliation(s)
| | - Jo A Crum
- Chemistry Department, Elon University
| | | | - Carol Milligan
- Department of Neurobiology and Anatomy, Wake Forest School of Medicine; Neuroscience Graduate Program, Wake Forest School of Medicine; ALS Center Translational Science Unit, Wake Forest School of Medicine
| | | |
Collapse
|
16
|
Blanchet L, Grefte S, Smeitink JAM, Willems PHGM, Koopman WJH. Photo-induction and automated quantification of reversible mitochondrial permeability transition pore opening in primary mouse myotubes. PLoS One 2014; 9:e114090. [PMID: 25423172 PMCID: PMC4244163 DOI: 10.1371/journal.pone.0114090] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 11/04/2014] [Indexed: 11/19/2022] Open
Abstract
Opening of the mitochondrial permeability transition pore (mPTP) is involved in various cellular processes including apoptosis induction. Two distinct states of mPTP opening have been identified allowing the transfer of molecules with a molecular weight <1500 Da or <300 Da. The latter state is considered to be reversible and suggested to play a role in normal cell physiology. Here we present a strategy combining live-cell imaging and computer-assisted image processing allowing spatial visualization and quantitative analysis of reversible mPTP openings ("ΔΨ flickering") in primary mouse myotubes. The latter were stained with the photosensitive cation TMRM, which partitions between the cytosol and mitochondrial matrix as a function of mitochondrial membrane potential (ΔΨ). Controlled illumination of TMRM-stained primary mouse myotubes induced ΔΨ flickering in particular parts of the cell ("flickering domains"). A novel quantitative automated analysis was developed and validated to detect and quantify the frequency, size, and location of individual ΔΨ flickering events in myotubes.
Collapse
Affiliation(s)
- Lionel Blanchet
- Department of Biochemistry, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
- Institute for Molecules and Materials, Analytical Chemistry/Chemometrics, Radboud University Nijmegen, Nijmegen, The Netherlands
- Centre for Systems Biology and Bioenergetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Sander Grefte
- Department of Biochemistry, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
- Centre for Systems Biology and Bioenergetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jan A. M. Smeitink
- Department of Paediatrics, Nijmegen Centre for Mitochondrial disorders, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Peter H. G. M. Willems
- Department of Biochemistry, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
- Centre for Systems Biology and Bioenergetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Werner J. H. Koopman
- Department of Biochemistry, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
- Centre for Systems Biology and Bioenergetics, Radboud University Medical Center, Nijmegen, The Netherlands
| |
Collapse
|
17
|
Villegas R, Martinez NW, Lillo J, Pihan P, Hernandez D, Twiss JL, Court FA. Calcium release from intra-axonal endoplasmic reticulum leads to axon degeneration through mitochondrial dysfunction. J Neurosci 2014; 34:7179-89. [PMID: 24849352 PMCID: PMC4028495 DOI: 10.1523/jneurosci.4784-13.2014] [Citation(s) in RCA: 128] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 02/26/2014] [Accepted: 04/12/2014] [Indexed: 12/30/2022] Open
Abstract
Axonal degeneration represents an early pathological event in neurodegeneration, constituting an important target for neuroprotection. Regardless of the initial injury, which could be toxic, mechanical, metabolic, or genetic, degeneration of axons shares a common mechanism involving mitochondrial dysfunction and production of reactive oxygen species. Critical steps in this degenerative process are still unknown. Here we show that calcium release from the axonal endoplasmic reticulum (ER) through ryanodine and IP3 channels activates the mitochondrial permeability transition pore and contributes to axonal degeneration triggered by both mechanical and toxic insults in ex vivo and in vitro mouse and rat model systems. These data reveal a critical and early ER-dependent step during axonal degeneration, providing novel targets for axonal protection in neurodegenerative conditions.
Collapse
MESH Headings
- Animals
- Axons/ultrastructure
- Calcium/metabolism
- Embryo, Mammalian
- Endoplasmic Reticulum/metabolism
- Endoplasmic Reticulum/pathology
- Female
- Ganglia, Spinal/metabolism
- Ganglia, Spinal/ultrastructure
- Imaging, Three-Dimensional
- Male
- Membrane Potential, Mitochondrial/drug effects
- Membrane Potential, Mitochondrial/physiology
- Mice
- Mice, Inbred C57BL
- Microscopy, Electron, Transmission
- Mitochondrial Diseases/pathology
- Mitochondrial Diseases/physiopathology
- Organ Culture Techniques
- Pregnancy
- Rats
- Rats, Sprague-Dawley
- Reactive Oxygen Species/metabolism
- Sciatic Nerve/ultrastructure
Collapse
Affiliation(s)
- Rosario Villegas
- Millennium Nucleus for Regenerative Biology, Department of Physiology, Faculty of Biology, Pontificia Universidad Catolica de Chile, Santiago 8331150, Chile
| | - Nicolas W Martinez
- Millennium Nucleus for Regenerative Biology, Department of Physiology, Faculty of Biology, Pontificia Universidad Catolica de Chile, Santiago 8331150, Chile
| | - Jorge Lillo
- Millennium Nucleus for Regenerative Biology, Department of Physiology, Faculty of Biology, Pontificia Universidad Catolica de Chile, Santiago 8331150, Chile
| | - Phillipe Pihan
- Millennium Nucleus for Regenerative Biology, Department of Physiology, Faculty of Biology, Pontificia Universidad Catolica de Chile, Santiago 8331150, Chile
| | - Diego Hernandez
- Millennium Nucleus for Regenerative Biology, Department of Physiology, Faculty of Biology, Pontificia Universidad Catolica de Chile, Santiago 8331150, Chile
| | - Jeffery L Twiss
- Department of Biological Sciences, University of South Carolina, Columbia, South Carolina 20208, and
| | - Felipe A Court
- Millennium Nucleus for Regenerative Biology, Department of Physiology, Faculty of Biology, Pontificia Universidad Catolica de Chile, Santiago 8331150, Chile, NeuroUnion Biomedical Foundation, Santiago 7630614, Chile
| |
Collapse
|
18
|
Zhang X, Zhang S, Zhu S, Chen S, Han J, Gao K, Zeng JZ, Yan X. Identification of Mitochondria-Targeting Anticancer Compounds by an in Vitro Strategy. Anal Chem 2014; 86:5232-7. [DOI: 10.1021/ac500918g] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Xiang Zhang
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, The Key Laboratory for Chemical Biology of Fujian Province, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Shuyue Zhang
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, The Key Laboratory for Chemical Biology of Fujian Province, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Shaobin Zhu
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, The Key Laboratory for Chemical Biology of Fujian Province, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Sha Chen
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, The Key Laboratory for Chemical Biology of Fujian Province, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Jinyan Han
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, The Key Laboratory for Chemical Biology of Fujian Province, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Kaimin Gao
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, The Key Laboratory for Chemical Biology of Fujian Province, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Jin-zhang Zeng
- School
of Pharmaceutical Sciences and Institute for Biomedical Research, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Xiaomei Yan
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, The Key Laboratory for Chemical Biology of Fujian Province, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| |
Collapse
|
19
|
Khairallah MI, Kassem LA, Yassin NA, El Din MAG, Zekri M, Attia M. The hematopoietic growth factor "erythropoietin" enhances the therapeutic effect of mesenchymal stem cells in Alzheimer's disease. Pak J Biol Sci 2014; 17:9-21. [PMID: 24783773 DOI: 10.3923/pjbs.2014.9.21] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Alzheimer's disease is a neurodegenerative disorder clinically characterized by cognitive dysfunction and by deposition of amyloid plaques, neurofibrillary tangles in the brain. The study investigated the therapeutic effect of combined mesenchymal stem cells and erythropoietin on Alzheimer's disease. Five groups of mice were used: control group, Alzheimer's disease was induced in four groups by a single intraperitoneal injection of 0.8 mg kg(-1) lipopolysaccharide and divided as follows: Alzheimer's disease group, mesenchymal stem cells treated group by injecting mesenchymal stem cells into the tail vein (2 x 10(6) cells), erythropoietin treated group (40 microg kg(-1) b.wt.) injected intraperitoneally 3 times/week for 5 weeks and mesenchymal stem cells and erythropoietin treated group. Locomotor activity and memory were tested using open field and Y-maze. Histological, histochemical, immunohistochemical studies, morphometric measurements were examined in brain sections of all groups. Choline transferase activity, brain derived neurotrophic factor expression and mitochondrial swellings were assessed in cerebral specimens. Lipopolysaccharide decreased locomotor activity, memory, choline transferase activity and brain derived neurotrophic factor. It increased mitochondrial swelling, apoptotic index and amyloid deposition. Combined mesenchymal stem cells and erythropoietin markedly improved all these parameters. This study proved the effective role of mesenchymal stem cells in relieving Alzheimer's disease symptoms and manifestations; it highlighted the important role of erythropoietin in the treatment of Alzheimer's disease.
Collapse
|
20
|
The physiological role of mitochondrial calcium revealed by mice lacking the mitochondrial calcium uniporter. Nat Cell Biol 2013; 15:1464-72. [PMID: 24212091 PMCID: PMC3852190 DOI: 10.1038/ncb2868] [Citation(s) in RCA: 512] [Impact Index Per Article: 46.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 09/25/2013] [Indexed: 02/07/2023]
Abstract
Mitochondrial calcium has been postulated to regulate a wide range of processes from bioenergetics to cell death. Here, we characterize a mouse model that lacks expression of the recently discovered mitochondrial calcium uniporter (MCU). Mitochondria derived from MCU-/- mice have no apparent capacity to rapidly uptake calcium. While basal metabolism appears unaffected, the skeletal muscle of MCU-/- mice exhibited alterations in the phosphorylation and activity of pyruvate dehydrogenase. In addition, MCU-/- mice exhibited marked impairment in their ability to perform strenuous work. We further show that mitochondria from MCU-/- mice lacked evidence for calcium-induced permeability transition pore (PTP) opening. The lack of PTP opening does not appear to protect MCU-/- cells and tissues from cell death, although MCU-/- hearts fail to respond to the PTP inhibitor cyclosporin A (CsA). Taken together, these results clarify how acute alterations in mitochondrial matrix calcium can regulate mammalian physiology.
Collapse
|
21
|
Díaz-Chávez J, Fonseca-Sánchez MA, Arechaga-Ocampo E, Flores-Pérez A, Palacios-Rodríguez Y, Domínguez-Gómez G, Marchat LA, Fuentes-Mera L, Mendoza-Hernández G, Gariglio P, López-Camarillo C. Proteomic profiling reveals that resveratrol inhibits HSP27 expression and sensitizes breast cancer cells to doxorubicin therapy. PLoS One 2013; 8:e64378. [PMID: 23724044 PMCID: PMC3664632 DOI: 10.1371/journal.pone.0064378] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 04/11/2013] [Indexed: 02/03/2023] Open
Abstract
The use of chemopreventive natural compounds represents a promising strategy in the search for novel therapeutic agents in cancer. Resveratrol (3,4′,5-trans-trihydroxystilbilene) is a dietary polyphenol found in fruits, vegetables and medicinal plants that exhibits chemopreventive and antitumor effects. In this study, we searched for modulated proteins with preventive or therapeutic potential in MCF-7 breast cancer cells exposed to resveratrol. Using two-dimensional electrophoresis we found significant changes (FC >2.0; p≤0.05) in the expression of 16 proteins in resveratrol-treated MCF-7 cells. Six down-regulated proteins were identified by tandem mass spectrometry (ESI-MS/MS) as heat shock protein 27 (HSP27), translationally-controlled tumor protein, peroxiredoxin-6, stress-induced-phosphoprotein-1, pyridoxine-5′-phosphate oxidase-1 and hypoxanthine-guanine phosphoribosyl transferase; whereas one up-regulated protein was identified as triosephosphate isomerase. Particularly, HSP27 overexpression has been associated to apoptosis inhibition and resistance of human cancer cells to therapy. Consistently, we demonstrated that resveratrol induces apoptosis in MCF-7 cells. Apoptosis was associated with a significant increase in mitochondrial permeability transition, cytochrome c release in cytoplasm, and caspases -3 and -9 independent cell death. Then, we evaluated the chemosensitization effect of increasing concentrations of resveratrol in combination with doxorubicin anti-neoplastic agent in vitro. We found that resveratrol effectively sensitize MCF-7 cells to cytotoxic therapy. Next, we evaluated the relevance of HSP27 targeted inhibition in therapy effectiveness. Results evidenced that HSP27 inhibition using RNA interference enhances the cytotoxicity of doxorubicin. In conclusion, our data indicate that resveratrol may improve the therapeutic effects of doxorubicin in part by cell death induction. We propose that potential modulation of HSP27 levels using natural alternative agents, as resveratrol, may be an effective adjuvant in breast cancer therapy.
Collapse
Affiliation(s)
- José Díaz-Chávez
- Carcinogenesis Laboratory, National Institute of Cancerology, Mexico City, Mexico
| | - Miguel A. Fonseca-Sánchez
- Oncogenomics and Cancer Proteomics Laboratory, Genomics Sciences Program, Autonomous University of Mexico City, Mexico City, Mexico
| | | | - Ali Flores-Pérez
- Oncogenomics and Cancer Proteomics Laboratory, Genomics Sciences Program, Autonomous University of Mexico City, Mexico City, Mexico
| | - Yadira Palacios-Rodríguez
- Oncogenomics and Cancer Proteomics Laboratory, Genomics Sciences Program, Autonomous University of Mexico City, Mexico City, Mexico
| | | | - Laurence A. Marchat
- Molecular Biomedicine Program and Biotechnology Network, National School of Medicine and Homeopathy, National Polytechnic Institute, Mexico City, Mexico
| | - Lizeth Fuentes-Mera
- Molecular Biology and Histocompatibility Laboratory, General “Dr. Manuel Gea González” Hospital, Mexico City, Mexico
| | | | - Patricio Gariglio
- Genetics and Molecular Biology Department, Center of Research and Advances Studies, Mexico City, Mexico
| | - César López-Camarillo
- Oncogenomics and Cancer Proteomics Laboratory, Genomics Sciences Program, Autonomous University of Mexico City, Mexico City, Mexico
- * E-mail:
| |
Collapse
|
22
|
Abstract
Mitochondria are implicated in many important cellular functions covering the whole life cycle from mitochondrial biogenesis to cell death. Mitochondrial homeostasis is tightly regulated, and mitochondrial dysfunction is frequently associated with severe human pathologies (eg, cardiovascular diseases, cancer, and neurodegeneration). The permeability transition pore (PTP) is an unselective voltage-dependent mitochondrial channel. Despite the extensive use of electrophysiology, biochemistry, pharmacology, and genetic invalidation in mice, the molecular identity of PTP is still unknown. Nevertheless, PTP is central to mitochondrial vital functions and can play a lethal role in many pathophysiological conditions. This review recapitulates the current knowledge of the various modes of conductance of the PTP channel and discusses their implication in the physiological roles of PTP and their regulation. Based on its involvement in normal physiology and human pathology, a better understanding of this channel and its roles remains a major goal for basic scientists and clinicians.
Collapse
Affiliation(s)
- Catherine Brenner
- INSERM UMR-S 769, LabEx LERMIT, Université de Paris-Sud, 5, Rue JB Clément, 92296 Châtenay-Malabry, France.
| | | |
Collapse
|
23
|
Picard M, Shirihai OS, Gentil BJ, Burelle Y. Mitochondrial morphology transitions and functions: implications for retrograde signaling? Am J Physiol Regul Integr Comp Physiol 2013; 304:R393-406. [PMID: 23364527 DOI: 10.1152/ajpregu.00584.2012] [Citation(s) in RCA: 212] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In response to cellular and environmental stresses, mitochondria undergo morphology transitions regulated by dynamic processes of membrane fusion and fission. These events of mitochondrial dynamics are central regulators of cellular activity, but the mechanisms linking mitochondrial shape to cell function remain unclear. One possibility evaluated in this review is that mitochondrial morphological transitions (from elongated to fragmented, and vice-versa) directly modify canonical aspects of the organelle's function, including susceptibility to mitochondrial permeability transition, respiratory properties of the electron transport chain, and reactive oxygen species production. Because outputs derived from mitochondrial metabolism are linked to defined cellular signaling pathways, fusion/fission morphology transitions could regulate mitochondrial function and retrograde signaling. This is hypothesized to provide a dynamic interface between the cell, its genome, and the fluctuating metabolic environment.
Collapse
Affiliation(s)
- Martin Picard
- Center for Mitochondrial and Epigenomic Medicine, Children’s Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA, USA
| | | | | | | |
Collapse
|
24
|
Inhibition of the Mitochondrial Permeability Transition for Cytoprotection: Direct versus Indirect Mechanisms. Biochem Res Int 2012; 2012:213403. [PMID: 22675634 PMCID: PMC3364550 DOI: 10.1155/2012/213403] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Accepted: 02/07/2012] [Indexed: 11/17/2022] Open
Abstract
Mitochondria are fascinating organelles, which fulfill multiple cellular functions, as diverse as energy production, fatty acid β oxidation, reactive oxygen species (ROS) production and detoxification, and cell death regulation. The coordination of these functions relies on autonomous mitochondrial processes as well as on sustained cross-talk with other organelles and/or the cytosol. Therefore, this implies a tight regulation of mitochondrial functions to ensure cell homeostasis. In many diseases (e.g., cancer, cardiopathies, nonalcoholic fatty liver diseases, and neurodegenerative diseases), mitochondria can receive harmful signals, dysfunction and then, participate to pathogenesis. They can undergo either a decrease of their bioenergetic function or a process called mitochondrial permeability transition (MPT) that can coordinate cell death execution. Many studies present evidence that protection of mitochondria limits disease progression and severity. Here, we will review recent strategies to preserve mitochondrial functions via direct or indirect mechanisms of MPT inhibition. Thus, several mitochondrial proteins may be considered for cytoprotective-targeted therapies.
Collapse
|
25
|
Singh M, Sasi P, Gupta VH, Rai G, Amarapurkar DN, Wangikar PP. Protective effect of curcumin, silymarin and N-acetylcysteine on antitubercular drug-induced hepatotoxicity assessed in an in vitro model. Hum Exp Toxicol 2012; 31:788-97. [PMID: 22318308 DOI: 10.1177/0960327111433901] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Tuberculosis (TB) is highly endemic in India. The first-line anti-TB therapy (ATT) involving isoniazid (INH), rifampicin and pyrazinamide causes hepatotoxicity in approximately 11.5% of Indian patients. Studies have shown that ATT-induced hepatotoxicity is primarily due to oxidative stress caused by the drugs and metabolites. Herbal drugs with antioxidative properties have been tested in animal studies and clinical trials for the management of hepatotoxicity. The objective of this study was to investigate the role of curcumin (CUR), silymarin (SILY) and N-acetylcysteine (N-ACET) on hepatotoxicity by ATT drugs using an in vitro model of human hepatocellular carcinoma cell line (HepG2). HepG2 cells were treated with ATT drugs alone or along with CUR, SILY or N-ACET for a 48-h duration. The cells were monitored for viability, morphology, respiring mitochondria and cell cycle. Our results suggest that the presence of hepatoprotective drugs during treatment of HepG2 cells with ATT drugs lowers the hepatotoxic effect of the latter. This is observed in terms of (a) increased cell viability, (b) healthy-looking cell morphology as revealed by phase contrast microscopy, (c) active respiring cells as observed with confocal microscopy upon staining with a mitochondrial membrane-specific dye, MitoTracker(®) Red, and reduction in the sub-G(1) peak in cell cycle analysis by flow cytometry. Our results suggest that these hepatoprotective drugs need to be further explored as potential adjuvant therapy along with ATT drugs.
Collapse
Affiliation(s)
- M Singh
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, India
| | | | | | | | | | | |
Collapse
|
26
|
Yang CL, Ma YG, Xue YX, Liu YY, Xie H, Qiu GR. Curcumin Induces Small Cell Lung Cancer NCI-H446 Cell Apoptosis via the Reactive Oxygen Species-Mediated Mitochondrial Pathway and Not the Cell Death Receptor Pathway. DNA Cell Biol 2012; 31:139-50. [PMID: 21711158 DOI: 10.1089/dna.2011.1300] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- Cheng-Liang Yang
- Department of Thoracic Surgery, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning Province, China
| | - Ye-Gang Ma
- Department of Thoracic Surgery, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning Province, China
| | - Yi-Xue Xue
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang, Liaoning Province, China
| | - Yong-Yu Liu
- Department of Thoracic Surgery, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning Province, China
| | - Hui Xie
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang, Liaoning Province, China
| | - Guang-Rong Qiu
- Medical Genetics, College of Basic Medicine, China Medical University, Shenyang, Liaoning Province, China
| |
Collapse
|
27
|
Tabatabaeian K, Khorshidi A, Dadashi A, Khoshnood M. Efficient RuIII-catalyzed synthesis of 9-aryl-9H-xanthene-3,6-diols as precursors to fluorones. CHINESE CHEM LETT 2012. [DOI: 10.1016/j.cclet.2011.11.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
28
|
Manna SK, Parai MK, Panda G. An efficient synthesis of 6H,7H-chromeno[4,3-b]chromenes and 6,7-dihydrothio chromeno[3,2-c]chromenes as 9-substituted xanthene like analogs. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.08.127] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
29
|
ATGL-mediated fat catabolism regulates cardiac mitochondrial function via PPAR-α and PGC-1. Nat Med 2011; 17:1076-85. [PMID: 21857651 DOI: 10.1038/nm.2439] [Citation(s) in RCA: 554] [Impact Index Per Article: 42.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Accepted: 07/08/2011] [Indexed: 01/05/2023]
Abstract
Peroxisome proliferator-activated receptors (PPARs) are nuclear hormone receptors that regulate genes involved in energy metabolism and inflammation. For biological activity, PPARs require cognate lipid ligands, heterodimerization with retinoic X receptors, and coactivation by PPAR-γ coactivator-1α or PPAR-γ coactivator-1β (PGC-1α or PGC-1β, encoded by Ppargc1a and Ppargc1b, respectively). Here we show that lipolysis of cellular triglycerides by adipose triglyceride lipase (patatin-like phospholipase domain containing protein 2, encoded by Pnpla2; hereafter referred to as Atgl) generates essential mediator(s) involved in the generation of lipid ligands for PPAR activation. Atgl deficiency in mice decreases mRNA levels of PPAR-α and PPAR-δ target genes. In the heart, this leads to decreased PGC-1α and PGC-1β expression and severely disrupted mitochondrial substrate oxidation and respiration; this is followed by excessive lipid accumulation, cardiac insufficiency and lethal cardiomyopathy. Reconstituting normal PPAR target gene expression by pharmacological treatment of Atgl-deficient mice with PPAR-α agonists completely reverses the mitochondrial defects, restores normal heart function and prevents premature death. These findings reveal a potential treatment for the excessive cardiac lipid accumulation and often-lethal cardiomyopathy in people with neutral lipid storage disease, a disease marked by reduced or absent ATGL activity.
Collapse
|
30
|
Dai ZJ, Gao J, Li ZF, Ji ZZ, Kang HF, Guan HT, Diao Y, Wang BF, Wang XJ. In vitro and in vivo antitumor activity of Scutellaria barbate extract on murine liver cancer. Molecules 2011; 16:4389-400. [PMID: 21623310 PMCID: PMC6264136 DOI: 10.3390/molecules16064389] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 05/10/2011] [Accepted: 05/23/2011] [Indexed: 01/20/2023] Open
Abstract
In the present study, we investigated the in vitro and in vivo antitumor effects of crude extract of Scutellaria barbate (CE-SB) on mouse hepatoma H22 cells. The MTT assay was used to determine the growth inhibition of H22 cells in vitro. The in vivo therapeutic effects of CE-SB were determined using H22 tumor bearing mice. Besides, the body weight, tumor weight, thymus index and spleen index of H22 bearing mice were also measured. The tumor inhibitory rate (IR) was calculated according to the mean weight of tumor (MWT). The phagocytotic function of macrophages was examined by observing peritoneal macrophages phagocytize chicken RBC. The results showed that CE-SB could inhibit the growth of hepatoma H22 Cells in vitro and in vivo. Furthermore, CE-SB could improve immune function of H22 tumor bearing mice. Together these results indicate that CE-SB has antitumor activity and seems to be safe and effective for the use of anti-tumor therapy.
Collapse
Affiliation(s)
- Zhi-Jun Dai
- Department of Oncology, the Second Affiliated Hospital, Medical School of Xi’an Jiaotong University, Xi’an 710004, China
- Authors to whom correspondence should be addressed; (Z-J.D.); (X-J.W.); Tel.: +86-29-8767-9226; Fax: +86-29-8767-9282
| | - Jie Gao
- Department of Oncology, the Second Affiliated Hospital, Medical School of Xi’an Jiaotong University, Xi’an 710004, China
| | - Zong-Fang Li
- Department of Oncology, the Second Affiliated Hospital, Medical School of Xi’an Jiaotong University, Xi’an 710004, China
| | - Zong-Zheng Ji
- Department of General Surgery, the Second Affiliated Hospital, Medical School of Xi’an Jiaotong University, Xi’an 710004, China
| | - Hua-Feng Kang
- Department of Oncology, the Second Affiliated Hospital, Medical School of Xi’an Jiaotong University, Xi’an 710004, China
| | - Hai-Tao Guan
- Department of Oncology, the Second Affiliated Hospital, Medical School of Xi’an Jiaotong University, Xi’an 710004, China
| | - Yan Diao
- Department of Oncology, the Second Affiliated Hospital, Medical School of Xi’an Jiaotong University, Xi’an 710004, China
| | - Bao-Feng Wang
- Department of Oncology, the Second Affiliated Hospital, Medical School of Xi’an Jiaotong University, Xi’an 710004, China
| | - Xi-Jing Wang
- Department of Oncology, the Second Affiliated Hospital, Medical School of Xi’an Jiaotong University, Xi’an 710004, China
- Authors to whom correspondence should be addressed; (Z-J.D.); (X-J.W.); Tel.: +86-29-8767-9226; Fax: +86-29-8767-9282
| |
Collapse
|
31
|
Barrientos SA, Martinez NW, Yoo S, Jara JS, Zamorano S, Hetz C, Twiss JL, Alvarez J, Court FA. Axonal degeneration is mediated by the mitochondrial permeability transition pore. J Neurosci 2011; 31:966-78. [PMID: 21248121 PMCID: PMC3245862 DOI: 10.1523/jneurosci.4065-10.2011] [Citation(s) in RCA: 168] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Revised: 10/27/2010] [Accepted: 11/01/2010] [Indexed: 01/23/2023] Open
Abstract
Axonal degeneration is an active process that has been associated with neurodegenerative conditions triggered by mechanical, metabolic, infectious, toxic, hereditary and inflammatory stimuli. This degenerative process can cause permanent loss of function, so it represents a focus for neuroprotective strategies. Several signaling pathways are implicated in axonal degeneration, but identification of an integrative mechanism for this self-destructive process has remained elusive. Here, we show that rapid axonal degeneration triggered by distinct mechanical and toxic insults is dependent on the activation of the mitochondrial permeability transition pore (mPTP). Both pharmacological and genetic targeting of cyclophilin D, a functional component of the mPTP, protects severed axons and vincristine-treated neurons from axonal degeneration in ex vivo and in vitro mouse and rat model systems. These effects were observed in axons from both the peripheral and central nervous system. Our results suggest that the mPTP is a key effector of axonal degeneration, upon which several independent signaling pathways converge. Since axonal and synapse degeneration are increasingly considered early pathological events in neurodegeneration, our work identifies a potential target for therapeutic intervention in a wide variety of conditions that lead to loss of axons and subsequent functional impairment.
Collapse
Affiliation(s)
- Sebastian A. Barrientos
- Department of Physiology, Faculty of Biology, Catholic University of Chile, Santiago 8331150, Chile
| | - Nicolas W. Martinez
- Department of Physiology, Faculty of Biology, Catholic University of Chile, Santiago 8331150, Chile
| | - Soonmoon Yoo
- Nemours Biomedical Research Institute, Alfred I. duPont Hospital for Children, Wilmington, Delaware 19716
| | - Juan S. Jara
- Department of Physiology, Faculty of Biology, Catholic University of Chile, Santiago 8331150, Chile
| | - Sebastian Zamorano
- Institute of Biomedical Sciences, Center for Molecular Studies of the Cell and Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago 8380453, Chile
| | - Claudio Hetz
- Institute of Biomedical Sciences, Center for Molecular Studies of the Cell and Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago 8380453, Chile
- Department of Immunology and Infectious Diseases, Harvard University School of Public Health, Boston, Massachusetts 02115
- NeuroUnion Biomedical Foundation, Santiago 7630614, Chile, and
| | - Jeffery L. Twiss
- Department of Biology, Drexel University, Philadelphia, Pennsylvania 19104
| | - Jaime Alvarez
- Department of Physiology, Faculty of Biology, Catholic University of Chile, Santiago 8331150, Chile
| | - Felipe A. Court
- Department of Physiology, Faculty of Biology, Catholic University of Chile, Santiago 8331150, Chile
- NeuroUnion Biomedical Foundation, Santiago 7630614, Chile, and
| |
Collapse
|
32
|
Inhibition of the mitochondrial permeability transition by protein kinase A in rat liver mitochondria and hepatocytes. Biochem J 2010; 431:411-21. [PMID: 20738255 DOI: 10.1042/bj20091741] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
NO and cGMP administered at reperfusion after ischaemia prevent injury to hepatocytes mediated by the MPT (mitochondrial permeability transition). To characterize further the mechanism of protection, the ability of hepatic cytosol in combination with cyclic nucleotides to delay onset of the calcium-induced MPT was evaluated in isolated rat liver mitochondria. Liver cytosol plus cGMP or cAMP dose-dependently inhibited the MPT, required ATP hydrolysis for inhibition and did not inhibit mitochondrial calcium uptake. Specific peptide inhibitors for PKA (protein kinase A), but not PKG (protein kinase G), abolished cytosol-induced inhibition of MPT onset. Activity assays showed a cGMP- and cAMP-stimulated protein kinase activity in liver cytosol that was completely inhibited by PKI, a PKA peptide inhibitor. Size-exclusion chromatography of liver cytosol produced a single peak of cGMP/cAMP-stimulated kinase activity with an estimated protein size of 180-220 kDa. This fraction was PKI-sensitive and delayed onset of the MPT. Incubation of active catalytic PKA subunit directly with mitochondria in the absence of cytosol and cyclic nucleotide also delayed MPT onset, and incubation with purified outer membranes led to phosphorylation of a major 31 kDa band. After ischaemia, administration at reperfusion of membrane-permeant cAMPs and cAMP-mobilizing glucagon prevented reperfusion injury to hepatocytes. In conclusion, PKA in liver cytosol activated by cGMP or cAMP acts directly on mitochondria to delay onset of the MPT and protect hepatocytes from cell death after ischaemia/reperfusion.
Collapse
|
33
|
Jensen KHR, Rekling JC. Development of a no-wash assay for mitochondrial membrane potential using the styryl dye DASPEI. ACTA ACUST UNITED AC 2010; 15:1071-81. [PMID: 20713988 DOI: 10.1177/1087057110376834] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Mitochondrial dysfunction is a hallmark of several diseases and may also result from drugs with unwanted side effects on mitochondrial biochemistry. The mitochondrial membrane potential is a good indicator of mitochondrial function. Here, the authors have developed a no-wash mitochondrial membrane potential assay using 2-(4-(dimethylamino)styryl)-N-ethylpyridinium iodide (DASPEI), a rarely used mitochondrial potentiometric probe, in a 96-well format using a fluorescent plate reader. The assay was validated using 2 protonophores (CCCP, DNP), which are known uncouplers, and the neuroleptic thioridazine, which is a suspected mitochondrial toxicant. CCCP and DNP have short-term depolarizing effects, and thioridazine has long-term hyperpolarizing effects on the mitochondrial membrane potential of Chinese hamster ovary (CHO) cells. The assay also detected changes of the mitochondrial membrane potential in CHO cells exposed to cobalt (mimicking hypoxia) and in PC12 cells exposed to amyloid β, demonstrating that the assay can be used in cellular models of hypoxia and Alzheimer's disease. The assay needs no washing steps, has a Z' value >0.5, can be used on standard fluorometers, has good post liquid-handling stability, and thus is suitable for large-scale screening efforts. In summary, the DASPEI assay is simple and rapid and may be of use in toxicological testing, drug target discovery, and mechanistic models of diseases involving mitochondrial dysfunction.
Collapse
Affiliation(s)
- Kristian H R Jensen
- Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, Denmark
| | | |
Collapse
|
34
|
|
35
|
Holman JD, Hand SC. Metabolic Depression is Delayed and Mitochondrial Impairment Averted during Prolonged Anoxia in the ghost shrimp, Lepidophthalmus louisianensis (Schmitt, 1935). JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY 2009; 376:85-93. [PMID: 20160865 PMCID: PMC2771345 DOI: 10.1016/j.jembe.2009.06.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Lepidophthalmus louisianensis burrows deeply into oxygen-limited estuarine sediments and is subjected to extended anoxia at low tides. Large specimens (>2 g) have a lethal time for 50% mortality (LT(50)) of 64 h under anoxia at 25º C. Small specimens (<1 g) have a significantly higher LT(50) of 113 h, which is the longest ever reported for a crustacean. Whole body lactate levels rise dramatically under anoxia and exceed 120 µmol g.f.w.(-1) by 72 h. ATP, ADP, and AMP do not change during 48 h of anoxia, but arginine phosphate declines by over 50%. Thus arginine phosphate may help stabilize the ATP pool. Surprisingly, when compared to the aerobic resting rate, ATP production under anoxia is unchanged during the first 12 h, and drops to only about 50% between 12 and 48 h. Finally, after 48 h of anoxia, a major metabolic depression to less than 5% occurs. Downregulation of metabolism is delayed in L. louisianensis compared to many invertebrates that exhibit facultative anaerobiosis. Bioenergetic constraints as a result of eventual metabolic depression led to ionic disturbances like calcium overload and compromised membrane potential of mitochondria. Because these phenomena trigger apoptosis in mammalian species, we evaluated the susceptibility of ghost shrimp mitochondria to opening of the mitochondrial permeability transition pore (MPTP) and associated damage. Energized mitochondria isolated from hepatopancreas possess a pronounced capacity for calcium uptake. Exogenous calcium does not stimulate opening of the MPTP, which potentially could reduce cell death during prolonged anoxia.
Collapse
Affiliation(s)
| | - Steven C. Hand
- Corresponding author. E-mail: ; Tel. No. 01-225-578-5144; Fax 01-225-578-2597; Department of Biological Sciences, 202 Life Sciences Bldg., Louisiana State University, Baton Rouge, LA 70803 USA
| |
Collapse
|
36
|
Guidelines for the use and interpretation of assays for monitoring cell death in higher eukaryotes. Cell Death Differ 2009; 16:1093-107. [PMID: 19373242 DOI: 10.1038/cdd.2009.44] [Citation(s) in RCA: 505] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Cell death is essential for a plethora of physiological processes, and its deregulation characterizes numerous human diseases. Thus, the in-depth investigation of cell death and its mechanisms constitutes a formidable challenge for fundamental and applied biomedical research, and has tremendous implications for the development of novel therapeutic strategies. It is, therefore, of utmost importance to standardize the experimental procedures that identify dying and dead cells in cell cultures and/or in tissues, from model organisms and/or humans, in healthy and/or pathological scenarios. Thus far, dozens of methods have been proposed to quantify cell death-related parameters. However, no guidelines exist regarding their use and interpretation, and nobody has thoroughly annotated the experimental settings for which each of these techniques is most appropriate. Here, we provide a nonexhaustive comparison of methods to detect cell death with apoptotic or nonapoptotic morphologies, their advantages and pitfalls. These guidelines are intended for investigators who study cell death, as well as for reviewers who need to constructively critique scientific reports that deal with cellular demise. Given the difficulties in determining the exact number of cells that have passed the point-of-no-return of the signaling cascades leading to cell death, we emphasize the importance of performing multiple, methodologically unrelated assays to quantify dying and dead cells.
Collapse
|
37
|
Lu YY, Chen TS, Qu JL, Pan WL, Sun L, Wei XB. Dihydroartemisinin (DHA) induces caspase-3-dependent apoptosis in human lung adenocarcinoma ASTC-a-1 cells. J Biomed Sci 2009; 16:16. [PMID: 19272183 PMCID: PMC2653522 DOI: 10.1186/1423-0127-16-16] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2008] [Accepted: 02/02/2009] [Indexed: 01/15/2023] Open
Abstract
Background Dihydroartemisinin (DHA), a semi-synthetic derivative of artemisinin, isolated from the traditional Chinese herb Artemisia annua, is recommended as the first-line anti-malarial drug with low toxicity. DHA has been shown to possess promising anticancer activities and induce cancer cell death through apoptotic pathways, although the molecular mechanisms are not well understood. Methods In this study, cell counting kit (CCK-8) assay was employed to evaluate the survival of DHA-treated ASTC-a-1 cells. The induction of apoptosis was detected by Hoechst 33258 and PI staining as well as flow cytometry analysis. Collapse of mitochondrial transmembrane potential (ΔΨm) was measured by dynamic detection under a laser scanning confocal microscope and flow cytometry analysis using Rhodamine123. Caspase-3 activities measured with or without Z-VAD-fmk (a broad spectrum caspase inhibitor) pretreatment by FRET techniques, caspase-3 activity measurement, and western blotting analysis. Results Our results indicated that DHA induced apoptotic cell death in a dose- and time-dependent manner, which was accompanied by mitochondrial morphology changes, the loss of ΔΨm and the activation of caspase-3. Conclusion These results show for the first time that DHA can inhibit proliferation and induce apoptosis via caspase-3-dependent mitochondrial death pathway in ASTC-a-1 cells. Our work may provide evidence for further studies of DHA as a possible anticancer drug in the clinical treatment of lung adenocarcinoma.
Collapse
Affiliation(s)
- Ying-Ying Lu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, South China Normal University, Guangzhou 510631, PR China.
| | | | | | | | | | | |
Collapse
|
38
|
Dai ZJ, Wang XJ, Li ZF, Ji ZZ, Ren HT, Tang W, Liu XX, Kang HF, Guan HT, Song LQ. Scutellaria barbate extract induces apoptosis of hepatoma H22 cells via the mitochondrial pathway involving caspase-3. World J Gastroenterol 2008; 14:7321-8. [PMID: 19109865 PMCID: PMC2778115 DOI: 10.3748/wjg.14.7321] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To study the growth inhibitory and apoptotic effects of Scutellaria barbata D.Don (S. barbata) and to determine the underlying mechanism of its antitumor activity in mouse liver cancer cell line H22.
METHODS: Proliferation of H22 cells was examined by MTT assay. Cellular morphology of PC-2 cells was observed under fluorescence microscope and transmission electron microscope (EM). Mitochondrial transmembrane potential was determined under laser scanning confocal microscope (LSCM) with rhodamine 123 staining. Flow cytometry was performed to analyze the cell cycle of H22 cells with propidium iodide staining. Protein level of cytochrome C and caspase-3 was measured by semi-quantitive RT-PCR and Western blot analysis. Activity of caspase-3 enzyme was measured by spectrofluorometry.
RESULTS: MTT assay showed that extracts from S. barbata (ESB) could inhibit the proliferation of H22 cells in a time-dependent manner. Among the various phases of cell cycle, the percentage of cells in S phase was significantly decreased, while the percentage of cells in G1 phase was increased. Flow cytometry assay also showed that ESB had a positive effect on apoptosis. Typical apoptotic morphologies such as condensation and fragmentation of nuclei and blebbing membrane of apoptotic cells could be observed under transmission electron microscope and fluorescence microscope. To further investige the molecular mechanism behind ESB-induced apoptosis, ESB-treated cells rapidly lost their mitochondrial transmembrane potential, released mitochondrial cytochrome C into cytosol, and induced caspase-3 activity in a dose-dependent manner.
CONCLUSION: ESB can effectively inhibit the proliferation and induce apoptosis of H22 cells involving loss of mitochondrial transmembrane potential, release of cytochrome C, and activation of caspase-3.
Collapse
|
39
|
Fluorescence assay for mitochondrial permeability transition in cardiomyocytes cultured in a microtiter plate. Anal Biochem 2008; 378:25-31. [DOI: 10.1016/j.ab.2008.03.042] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2007] [Revised: 03/14/2008] [Accepted: 03/24/2008] [Indexed: 11/20/2022]
|
40
|
Haroon MF, Fatima A, Schöler S, Gieseler A, Horn TFW, Kirches E, Wolf G, Kreutzmann P. Minocycline, a possible neuroprotective agent in Leber’s hereditary optic neuropathy (LHON): Studies of cybrid cells bearing 11778 mutation. Neurobiol Dis 2007; 28:237-50. [PMID: 17822909 DOI: 10.1016/j.nbd.2007.07.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2007] [Revised: 06/25/2007] [Accepted: 07/10/2007] [Indexed: 02/03/2023] Open
Abstract
Leber's hereditary optic neuropathy (LHON) is a retinal neurodegenerative disorder caused by mitochondrial DNA point mutations. Complex I of the respiratory chain affected by the mutation results in a decrease in ATP and an increase of reactive oxygen species production. Evaluating the efficacy of minocycline in LHON, the drug increased the survival of cybrid cells in contrast to the parental cells after thapsigargin-induced calcium overload. Similar protection was observed by treatment with cyclosporine A, a blocker of the mitochondrial permeability transition pore (mPTP). Ratiometric Ca(2+) imaging reveals that acetylcholine/thapsigargin triggered elevation of the cytosolic calcium concentration is alleviated by minocycline and cyclosporine A. The mitochondrial membrane potential of LHON cybrids was significantly conserved and the active-caspase-3/procaspase-3 ratio was decreased in both treatments. Our observations show that minocycline inhibits permeability transition induced by thapsigargin in addition to its antioxidant effects. In relation with its high safety profile, these results would suggest minocycline as a promising neuroprotective agent in LHON.
Collapse
Affiliation(s)
- Mohammad Fahad Haroon
- Institute of Medical Neurobiology, Otto-von-Guericke University of Magdeburg, Leipziger Strasse 44, D-39120 Magdeburg, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
41
|
Dykens JA, Marroquin LD, Will Y. Strategies to reduce late-stage drug attrition due to mitochondrial toxicity. Expert Rev Mol Diagn 2007; 7:161-75. [PMID: 17331064 DOI: 10.1586/14737159.7.2.161] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Mitochondrial dysfunction is increasingly implicated in the etiology of drug-induced toxicities and negative side-effect profiles. Early identification of mitochondrial liabilities for new chemical entities is therefore crucial for avoiding late-stage attrition during drug development. Limitations of traditional methods for assessing mitochondrial dysfunction have discouraged routine evaluation of mitochondrial liabilities. To circumvent this bottleneck, a high-throughput screen has been developed that measures oxygen consumption; one of the most informative parameters for the assessment of mitochondrial status. This technique has revealed that some, but not all, members of many major drug classes have mitochondrial liabilities. This dichotomy encourages optimism that efficacy can be disassociated from mitochondrial toxicity, resulting in safer drugs in the future.
Collapse
Affiliation(s)
- James A Dykens
- Pfizer DSRD, 10646 Science Center Drive, San Diego, CA 92121, USA.
| | | | | |
Collapse
|
42
|
Dykens JA, Will Y. The significance of mitochondrial toxicity testing in drug development. Drug Discov Today 2007; 12:777-85. [PMID: 17826691 DOI: 10.1016/j.drudis.2007.07.013] [Citation(s) in RCA: 282] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2007] [Revised: 07/13/2007] [Accepted: 07/16/2007] [Indexed: 10/22/2022]
Abstract
Mitochondrial dysfunction is increasingly implicated in the etiology of drug-induced toxicities. Members of diverse drug classes undermine mitochondrial function, and among the most potent are drugs that have been withdrawn from the market, or have received Black Box warnings from the FDA. To avoid mitochondrial liabilities, routine screens need to be positioned within the drug-development process. Assays for mitochondrial function, cell models that better report mitochondrial impairment, and new animal models that more faithfully reflect clinical manifestations of mitochondrial dysfunction are discussed in the context of how such data can reduce late stage attrition of drug candidates and can yield safer drugs in the future.
Collapse
Affiliation(s)
- James A Dykens
- Drug Safety Research and Development, Pfizer Inc., 10646 Science Center Drive, San Diego, CA 92121, United States.
| | | |
Collapse
|
43
|
Li Y, Boehning DF, Qian T, Popov VL, Weinman SA. Hepatitis C virus core protein increases mitochondrial ROS production by stimulation of Ca2+ uniporter activity. FASEB J 2007; 21:2474-85. [PMID: 17392480 DOI: 10.1096/fj.06-7345com] [Citation(s) in RCA: 125] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Many viruses have evolved mechanisms to alter mitochondrial function. The hepatitis C virus (HCV) produces a viral core protein that targets to mitochondria and increases Ca2+-dependent ROS production. The aim of this study was to determine whether core's effects are mediated by changes in mitochondrial Ca2+ uptake. Core expression caused enhanced mitochondrial Ca2+ uptake in response to ER Ca2+ release induced by thapsigargin or ATP. It also increased mitochondrial superoxide production and mitochondrial permeability transition (MPT). Incubating mouse liver mitochondria with an HCV core (100 ng/mg) in vitro increased Ca2+ entry rate by approximately 2-fold. Entry was entirely inhibited by the mitochondrial Ca2+ uniporter inhibitor, Ru-360, but not influenced by an Na+/Ca2+ exchanger inhibitor or ROS scavengers. These results indicate that core directly increases mitochondrial Ca2+ uptake via a primary effect on the uniporter. This enhanced the ability of mitochondria to sequester Ca2+ in response to ER Ca2+ release, and increased mitochondrial ROS production and MPT. Thus, the mitochondrial Ca2+ uniporter is a newly identified target for viral modification of cell function.
Collapse
Affiliation(s)
- Yanchun Li
- Department of Neuroscience and Cell Biology, University of Texas Medical Branch, 301 University Blvd., Galveston, TX 77555-0620, USA
| | | | | | | | | |
Collapse
|
44
|
Abstract
Irrespective of the morphological features of end-stage cell death (that may be apoptotic, necrotic, autophagic, or mitotic), mitochondrial membrane permeabilization (MMP) is frequently the decisive event that delimits the frontier between survival and death. Thus mitochondrial membranes constitute the battleground on which opposing signals combat to seal the cell's fate. Local players that determine the propensity to MMP include the pro- and antiapoptotic members of the Bcl-2 family, proteins from the mitochondrialpermeability transition pore complex, as well as a plethora of interacting partners including mitochondrial lipids. Intermediate metabolites, redox processes, sphingolipids, ion gradients, transcription factors, as well as kinases and phosphatases link lethal and vital signals emanating from distinct subcellular compartments to mitochondria. Thus mitochondria integrate a variety of proapoptotic signals. Once MMP has been induced, it causes the release of catabolic hydrolases and activators of such enzymes (including those of caspases) from mitochondria. These catabolic enzymes as well as the cessation of the bioenergetic and redox functions of mitochondria finally lead to cell death, meaning that mitochondria coordinate the late stage of cellular demise. Pathological cell death induced by ischemia/reperfusion, intoxication with xenobiotics, neurodegenerative diseases, or viral infection also relies on MMP as a critical event. The inhibition of MMP constitutes an important strategy for the pharmaceutical prevention of unwarranted cell death. Conversely, induction of MMP in tumor cells constitutes the goal of anticancer chemotherapy.
Collapse
Affiliation(s)
- Guido Kroemer
- Institut Gustave Roussy, Institut National de la Santé et de la Recherche Médicale Unit "Apoptosis, Cancer and Immunity," Université de Paris-Sud XI, Villejuif, France
| | | | | |
Collapse
|
45
|
Galluzzi L, Zamzami N, de La Motte Rouge T, Lemaire C, Brenner C, Kroemer G. Methods for the assessment of mitochondrial membrane permeabilization in apoptosis. Apoptosis 2007; 12:803-13. [PMID: 17294081 DOI: 10.1007/s10495-007-0720-1] [Citation(s) in RCA: 162] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Mitochondrial membrane permeabilization (MMP) is considered as the "point-of-no-return" in numerous models of programmed cell death. Indeed, mitochondria determine the intrinsic pathway of apoptosis, and play a major role in the extrinsic route as well. MMP affects the inner and outer mitochondrial membranes (IM and OM, respectively) to a variable degree. OM permeabilization culminates in the release of proteins that normally are confined in the mitochondrial intermembrane space (IMS), including caspase activators (e.g. cytochrome c) and caspase-independent death effectors (e.g. apoptosis-inducing factor). Partial IM permeabilization disrupts mitochondrial ion and volume homeostasis and dissipates the mitochondrial transmembrane potential (DeltaPsi(m)). The assessment of early mitochondrial alterations allows for the identification of cells that are committed to die but have not displayed yet the apoptotic phenotype. Several techniques to measure MMP by cytofluorometry and fluorescence microscopy have been developed. Here, we summarize the currently available methods for the detection of MMP, and provide a comparative analysis of these techniques.
Collapse
Affiliation(s)
- Lorenzo Galluzzi
- INSERM U848, Institut Gustave Roussy PR 1, 30 rue Camille Desmoulins, F-94805 Villejuif, France
| | | | | | | | | | | |
Collapse
|
46
|
Lemasters JJ, Ramshesh VK. Imaging of mitochondrial polarization and depolarization with cationic fluorophores. Methods Cell Biol 2007; 80:283-95. [PMID: 17445700 DOI: 10.1016/s0091-679x(06)80014-2] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- John J Lemasters
- Center for Cell Death, Injury and Regeneration, and Departments of Pharmaceutical Sciences and Biochemistry & Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | | |
Collapse
|
47
|
Hammond LE, Albright CD, He L, Rusyn I, Watkins SM, Doughman SD, Lemasters JJ, Coleman RA. Increased oxidative stress is associated with balanced increases in hepatocyte apoptosis and proliferation in glycerol-3-phosphate acyltransferase-1 deficient mice. Exp Mol Pathol 2006; 82:210-9. [PMID: 17258706 PMCID: PMC1865130 DOI: 10.1016/j.yexmp.2006.12.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2006] [Revised: 12/06/2006] [Accepted: 12/13/2006] [Indexed: 01/07/2023]
Abstract
The absence of mouse mitochondrial glycerol-3-phosphate acyltransferase-1 (Gpat1-/-) increases the amount of arachidonate in liver phospholipids and increases beta-hydroxybutyrate and acyl-carnitines, suggesting an elevated rate of liver fatty acid oxidation. We asked whether these alterations might increase reactive oxygen species (ROS), apoptosis, or hepatocyte proliferation. Compared to wildtype controls, liver mitochondria from Gpat1-/- mice showed a 20% increase in the rate of ROS production and a markedly increased sensitivity to the induction of the mitochondrial permeability transition. Mitochondrial phosphatidylethanolamine and phosphatidylcholine from Gpat1-/- liver contained 21% and 67% more arachidonate, respectively, than wildtype controls, and higher amounts of 4-hydroxynonenal, a product of arachidonate peroxidation. Oxidative stress was associated with an increase in apoptosis, and with 3-fold and 15-fold higher TUNEL positive cells in liver from young and old Gpat1-/- mice, respectively, compared to age-matched controls. Compared to controls, bromodeoxyuridine labeling was 50% and 7-fold higher in livers from young and old Gpat1-/- mice, respectively, but fewer glutathione-S-transferase positive cells were present. Thus, Gpat1-/- liver exhibits increased oxidative stress and sensitivity of the mitochondrial permeability transition pore, and a balanced increase in apoptosis and proliferation.
Collapse
Affiliation(s)
- Linda E Hammond
- Department of Nutrition, CB#7461, 2301 Michael Hooker Research Building, Columbia Street, University of North Carolina, Chapel Hill, NC 27599, USA
| | | | | | | | | | | | | | | |
Collapse
|
48
|
Boelsterli UA, Lim PLK. Mitochondrial abnormalities--a link to idiosyncratic drug hepatotoxicity? Toxicol Appl Pharmacol 2006; 220:92-107. [PMID: 17275868 DOI: 10.1016/j.taap.2006.12.013] [Citation(s) in RCA: 166] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2006] [Revised: 12/12/2006] [Accepted: 12/12/2006] [Indexed: 12/17/2022]
Abstract
Idiosyncratic drug-induced liver injury (DILI) is a major clinical problem and poses a considerable challenge for drug development as an increasing number of successfully launched drugs or new potential drugs have been implicated in causing DILI in susceptible patient subsets. Although the incidence for a particular drug is very low (yet grossly underestimated), the outcome of DILI can be serious. Unfortunately, prediction has remained poor (both for patients at risk and for new chemical entities). The underlying mechanisms and the determinants of susceptibility have largely remained ill-defined. The aim of this review is to provide both clinical and experimental evidence for a major role of mitochondria both as a target of drugs causing idiosyncratic DILI and as mediators of delayed liver injury. We develop a unifying hypothesis that involves underlying genetic or acquired mitochondrial abnormalities as a major determinant of susceptibility for a number of drugs that target mitochondria and cause DILI. The mitochondrial hypothesis, implying gradually accumulating and initially silent mitochondrial injury in heteroplasmic cells which reaches a critical threshold and abruptly triggers liver injury, is consistent with the findings that typically idiosyncratic DILI is delayed (by weeks or months), that increasing age and female gender are risk factors and that these drugs are targeted to the liver and clearly exhibit a mitochondrial hazard in vitro and in vivo. New animal models (e.g., the Sod2(+/-) mouse) provide supporting evidence for this concept. However, genetic analyses of DILI patient samples are needed to ultimately provide the proof-of-concept.
Collapse
Affiliation(s)
- Urs A Boelsterli
- Molecular Toxicology Lab, Department of Pharmacology, Yong Loo Lin School of Medicine, Singapore.
| | | |
Collapse
|
49
|
He L, Lemasters JJ. Dephosphorylation of the Rieske iron-sulfur protein after induction of the mitochondrial permeability transition. Biochem Biophys Res Commun 2006; 334:829-37. [PMID: 16023995 DOI: 10.1016/j.bbrc.2005.06.170] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2005] [Accepted: 06/29/2005] [Indexed: 10/25/2022]
Abstract
In the mitochondrial permeability transition (MPT), MPT pores open to cause the mitochondrial inner membrane to become non-selectively permeable to molecules of mass up to 1500 Da. In this study, we used proteomics to investigate protein changes after MPT induction. Isolated rat liver mitochondria were incubated with various MPT inducers, including CaCl2, tert-butylhydroperoxide, and phenylarsine oxide, in the presence and absence of the MPT inhibitor, cyclosporin A. MPT induction was confirmed by an absorbance swelling assay. Mitochondrial membrane proteins prepared from control and treated mitochondria were separated by two-dimensional (2D) gel electrophoresis and stained with SyproRuby or Coomassie blue. Proteins of interest were further identified by mass spectrometry. 2D gel electrophoresis by isoelectric focusing and SDS-PAGE consistently showed a protein spot that shifted to a more basic isoelectric point after the MPT. This shift was prevented by CsA but did not occur after protonophoric uncoupling. Mass spectrometry identified this protein as the Rieske iron-sulfur protein (RISP) of ubiquinol-cytochrome c reductase (Complex III). Phosphatase treatment of sonicated mitochondria caused the same shift in RISP as occurred in MPT inducer-treated mitochondria. 2D gel electrophoresis by blue-native-PAGE and SDS-PAGE showed that RISP existed as an apparent monomer in mitochondrial membranes in addition to forming a complex with ubiquinol-cytochrome c reductase. These findings suggest that RISP may be part of MPT pores and that dephosphorylation of RISP may play a role in regulation of the MPT.
Collapse
Affiliation(s)
- Lihua He
- Department of Cell and Developmental Biology, University of North Carolina, Chapel Hill, NC 27599-7090, USA
| | | |
Collapse
|
50
|
Yang Y, Escobedo JO, Wong L, Schowalter CM, Touchy MC, Jiao L, Crowe WE, Fronczek FR, Strongin RM. A convenient preparation of xanthene dyes. J Org Chem 2006; 70:6907-12. [PMID: 16095313 PMCID: PMC3376412 DOI: 10.1021/jo051002a] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A facile synthetic route utilizing readily available reagents affords a series of regioisomerically pure xanthene dye derivatives. Advantages include relatively mild conditions and good to excellent yields. Nonpolar, highly crystalline intermediates are isolable by standard chromatographic techniques. The intermediates are in the requisite xanthene oxidation state, thus avoiding the need for relatively inefficient oxidation chemistry and/or harsh conditions. During the course of this work, a new boron-mediated 1,2-aryl migration reaction was discovered.
Collapse
|