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Kaniuka O, Deregowska A, Bandura Y, Sabadashka M, Chala D, Kulachkovskyi O, Kubis H, Adamczyk-Grochala J, Sybirna N. Upregulation of GRP78 is accompanied by decreased antioxidant response and mitophagy promotion in streptozotocin-induced type 1 diabetes in rats. Biochim Biophys Acta Mol Basis Dis 2024; 1871:167531. [PMID: 39353543 DOI: 10.1016/j.bbadis.2024.167531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 09/11/2024] [Accepted: 09/25/2024] [Indexed: 10/04/2024]
Abstract
Endoplasmic reticulum stress, oxidative stress, and mitochondrial dysfunction are interconnected processes involved in the pathogenesis of diabetes mellitus (DM). In the present study, we demonstrate a distinct unfolded protein response (UPR) signaling pathways in two mammalian models of DM: β-TC-6 cell line and streptozotocin-induced type 1 diabetes model in rats. However, a feature common to both systems was the upregulation of the GRP78 protein. Moreover, in vivo studies showed the disruption of the antioxidant system and an escalation of mitophagy against the background of a depletion of the level of ATP in pancreatic cells. In conclusion, we suggest that glucotoxic conditions induced GRP78 upregulation, and next cause depletion of the antioxidant pool and disruption of the functioning of antioxidant defense enzymes and in consequence promote mitophagy in pancreatic cells. Therefore, GRP78 may be considered as a potential therapeutic factor in patients with diabetes.
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Affiliation(s)
- O Kaniuka
- Department of Biochemistry, Ivan Franko National University of Lviv, 1, Universytetska St., 79000 Lviv, Ukraine.
| | - A Deregowska
- Institute of Biotechnology, College of Natural Sciences, University of Rzeszow, Pigonia 1, 35-310 Rzeszow, Poland.
| | - Yu Bandura
- Department of Biochemistry, Ivan Franko National University of Lviv, 1, Universytetska St., 79000 Lviv, Ukraine.
| | - M Sabadashka
- Department of Biochemistry, Ivan Franko National University of Lviv, 1, Universytetska St., 79000 Lviv, Ukraine.
| | - D Chala
- Department of Biochemistry, Ivan Franko National University of Lviv, 1, Universytetska St., 79000 Lviv, Ukraine.
| | - O Kulachkovskyi
- Department of Biochemistry, Ivan Franko National University of Lviv, 1, Universytetska St., 79000 Lviv, Ukraine.
| | - H Kubis
- Institute of Biotechnology, College of Natural Sciences, University of Rzeszow, Pigonia 1, 35-310 Rzeszow, Poland.
| | - J Adamczyk-Grochala
- Institute of Biotechnology, College of Natural Sciences, University of Rzeszow, Pigonia 1, 35-310 Rzeszow, Poland.
| | - N Sybirna
- Department of Biochemistry, Ivan Franko National University of Lviv, 1, Universytetska St., 79000 Lviv, Ukraine.
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2
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Zhou H, Dai Z, Li J, Wang J, Zhu H, Chang X, Wang Y. TMBIM6 prevents VDAC1 multimerization and improves mitochondrial quality control to reduce sepsis-related myocardial injury. Metabolism 2023; 140:155383. [PMID: 36603706 DOI: 10.1016/j.metabol.2022.155383] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 12/17/2022] [Accepted: 12/18/2022] [Indexed: 01/03/2023]
Abstract
BACKGROUND The regulatory mechanisms involved in mitochondrial quality control (MQC) dysfunction during septic cardiomyopathy (SCM) remain incompletely characterized. Transmembrane BAX inhibitor motif containing 6 (TMBIM6) is an endoplasmic reticulum protein with Ca2+ leak activity that modulates cellular responses to various cellular stressors. METHODS In this study, we evaluated the role of TMBIM6 in SCM using cardiomyocyte-specific TMBIM6 knockout (TMBIM6CKO) and TMBIM6 transgenic (TMBIM6TG) mice. RESULTS Myocardial TMBIM6 transcription and expression were significantly downregulated in wild-type mice upon LPS exposure, along with characteristic alterations in myocardial systolic/diastolic function, cardiac inflammation, and cardiomyocyte death. Notably, these alterations were further exacerbated in LPS-treated TMBIM6CKO mice, and largely absent in TMBIM6TG mice. In LPS-treated primary cardiomyocytes, TMBIM6 deficiency further impaired mitochondrial respiration and ATP production, while defective MQC was suggested by enhanced mitochondrial fission, impaired mitophagy, and disrupted mitochondrial biogenesis. Structural protein analysis, Co-IP, mutant TMBIM6 plasmid transfection, and molecular docking assays subsequently indicated that TMBIM6 exerts cardioprotection against LPS-induced sepsis by interacting with and preventing the oligomerization of voltage-dependent anion channel-1 (VDAC1), the major route of mitochondrial Ca2+ uptake. CONCLUSION We conclude that the TMBIM6-VDAC1 interaction prevents VDAC1 oligomerization and thus sustains mitochondrial Ca2+ homeostasis as well as MQC, contributing to improved myocardial function in SCM.
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Affiliation(s)
- Hao Zhou
- School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China; Department of Cardiology, The Sixth Medical Center of People's Liberation Army General Hospital, Beijing, China
| | - Zhe Dai
- School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Jialei Li
- School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Jin Wang
- Department of Vascular Medicine, Peking University Shougang Hospital, Beijing 100144, China
| | - Hang Zhu
- School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Xing Chang
- Guang'anmen Hospital of Chinese Academy of Traditional Chinese Medicine, Beijing, China
| | - Yijin Wang
- School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China.
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3
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Ma L, Liao L, Zhou N, Tao H, Zhou H, Tan Y, Chen W, Cao F, Chen X. Transmembrane BAX inhibitor motif containing 6 suppresses presenilin-2 to preserve mitochondrial integrity after myocardial ischemia-reperfusion injury. Int J Biol Sci 2023; 19:1228-1240. [PMID: 36923943 PMCID: PMC10008687 DOI: 10.7150/ijbs.81100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 01/21/2023] [Indexed: 03/13/2023] Open
Abstract
Myocardial ischemia-reperfusion (I/R) damage is characterized by mitochondrial damage in cardiomyocytes. Transmembrane BAX inhibitor motif containing 6 (TMBIM6) and presenilin-2 (PS2) participate in multiple mitochondrial pathways; thus, we investigated the impact of these proteins on mitochondrial homeostasis during an acute reperfusion injury. Myocardial post-ischemic reperfusion stress impaired myocardial function, induced structural abnormalities and promoted cardiomyocyte death by disrupting the mitochondrial integrity in wild-type mice, but not in TMBIM6 transgenic mice. We found that TMBIM6 bound directly to PS2 and promoted its post-transcriptional degradation. Knocking out PS2 in mice reduced I/R injury-induced cardiac dysfunction, inflammatory responses, myocardial swelling and cardiomyocyte death by improving the mitochondrial integrity. These findings demonstrate that sufficient TMBIM6 expression can prevent PS2 accumulation during cardiac I/R injury, thus suppressing reperfusion-induced mitochondrial damage. Therefore, TMBIM6 and PS2 are promising therapeutic targets for the treatment of cardiac reperfusion damage.
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Affiliation(s)
- Li Ma
- Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Heart Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
- ✉ Corresponding author: Dr. Li Ma, E-mail: . Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Heart Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China. Dr. Xinxin Chen, E-mail: . Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Heart Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Lihan Liao
- Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Heart Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Na Zhou
- Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Heart Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Huikang Tao
- Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Heart Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Hao Zhou
- Department of Cardiology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, 100037, China
| | - Ying Tan
- Department of Cardiology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, 100037, China
| | - Weidan Chen
- Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Heart Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Fan Cao
- Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Heart Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Xinxin Chen
- Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Heart Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
- ✉ Corresponding author: Dr. Li Ma, E-mail: . Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Heart Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China. Dr. Xinxin Chen, E-mail: . Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Heart Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
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Qing Z, Ahmad S, Chen Y, Liang Q, Zhang L, Chen B, Wen R. P3/P3N-PIPO of PVY interacting with BI-1 inhibits the degradation of NIb by ATG6 to facilitate virus replication in N. benthamiana. FRONTIERS IN PLANT SCIENCE 2023; 14:1183144. [PMID: 37139112 PMCID: PMC10149851 DOI: 10.3389/fpls.2023.1183144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 03/31/2023] [Indexed: 05/05/2023]
Abstract
Introduction Autophagy not only plays an antiviral role but also can be utilized by viruses to facilitate virus infection. However, the underlying mechanism of potato virus Y (PVY) infection against plant autophagy remains unclear. BI-1, localizing to the endoplasmic reticulum (ER), is a multifunctional protein and may affect the virus infection. Methods In this study, Y2H, BiFC, qRT-PCR, RNA-Seq, WB and so on were used for research. Results P3 and P3N-PIPO of PVY can interact with the Bax inhibitor 1 (BI-1) of N. benthamiana. However, BI-1 knockout mutant showed better growth and development ability. In addition, when the BI-1 gene was knocked out or knocked down in N. benthamiana, the PVY-infected mutant showed milder symptoms and lower virus accumulation. Analysis of transcriptome data showed that the deletion of NbBI-1 weakened the gene expression regulation induced by PVY infection and NbBI-1 may reduce the mRNA level of NbATG6 by regulated IRE1-dependent decay (RIDD) in PVY-infected N. benthamiana. The expression level of the ATG6 gene of PVY-infected WT was significantly down-regulated, relative to the PVY-infected mutant. Further results showed that ATG6 of N. benthamiana can degrade NIb, the RNA-dependent RNA polymerase (RdRp) of PVY. NbATG6 has a higher mRNA level in PVY-infected BI-1 knockout mutants than in PVY-infected WT. Conclussion The interaction of P3 and/or P3N-PIPO of PVY with BI-1 decrease the expression of the ATG6 gene might be mediated by RIDD, which inhibits the degradation of viral NIb and enhances viral replication.
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Affiliation(s)
- Zhen Qing
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, China
| | - Shakeel Ahmad
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, China
| | - Yuemeng Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, China
| | - Qingmin Liang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, China
| | - Lijuan Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, China
| | - Baoshan Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, China
- College of Agriculture, Guangxi University, Nanning, China
| | - Ronghui Wen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, China
- *Correspondence: Ronghui Wen,
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Canonical and Noncanonical ER Stress-Mediated Autophagy Is a Bite the Bullet in View of Cancer Therapy. Cells 2022; 11:cells11233773. [PMID: 36497032 PMCID: PMC9738281 DOI: 10.3390/cells11233773] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 11/20/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022] Open
Abstract
Cancer cells adapt multiple mechanisms to counter intense stress on their way to growth. Tumor microenvironment stress leads to canonical and noncanonical endoplasmic stress (ER) responses, which mediate autophagy and are engaged during proteotoxic challenges to clear unfolded or misfolded proteins and damaged organelles to mitigate stress. In these conditions, autophagy functions as a cytoprotective mechanism in which malignant tumor cells reuse degraded materials to generate energy under adverse growing conditions. However, cellular protection by autophagy is thought to be complicated, contentious, and context-dependent; the stress response to autophagy is suggested to support tumorigenesis and drug resistance, which must be adequately addressed. This review describes significant findings that suggest accelerated autophagy in cancer, a novel obstacle for anticancer therapy, and discusses the UPR components that have been suggested to be untreatable. Thus, addressing the UPR or noncanonical ER stress components is the most effective approach to suppressing cytoprotective autophagy for better and more effective cancer treatment.
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Carreras-Sureda A, Kroemer G, Cardenas JC, Hetz C. Balancing energy and protein homeostasis at ER-mitochondria contact sites. Sci Signal 2022; 15:eabm7524. [DOI: 10.1126/scisignal.abm7524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The endoplasmic reticulum (ER) is the largest organelle of the cell and participates in multiple essential functions, including the production of secretory proteins, lipid synthesis, and calcium storage. Sustaining proteostasis requires an intimate coupling with energy production. Mitochondrial respiration evolved to be functionally connected to ER physiology through a physical interface between both organelles known as mitochondria-associated membranes. This quasi-synaptic structure acts as a signaling hub that tunes the function of both organelles in a bidirectional manner and controls proteostasis, cell death pathways, and mitochondrial bioenergetics. Here, we discuss the main signaling mechanisms governing interorganellar communication and their putative role in diseases including cancer and neurodegeneration.
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Affiliation(s)
- Amado Carreras-Sureda
- Department of Cell Physiology and Metabolism, University of Geneva, 1, rue Michel-Servet, 1211 Geneva, Switzerland
| | - Guido Kroemer
- Centre de Recherche des Cordeliers, Equipe labellisée par la Ligue contre le cancer, Université de Paris, Sorbonne Université, Inserm U1138, Institut Universitaire de France, 75006 Paris, France
- Metabolomics and Cell Biology Platforms, Institut Gustave Roussy, 94805 Villejuif, France
- Department of Biology, Institut du Cancer Paris CARPEM, Hôpital Européen Georges Pompidou, AP-HP, 75015 Paris, France
| | - Julio Cesar Cardenas
- Center for Integrative Biology, Mayor University, 7510041 Santiago, Chile
- Center for Geroscience, Brain Health, and Metabolism, 70086 Santiago, Chile
- Buck Institute for Research on Aging, Novato, CA 94945, USA
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106, USA
| | - Claudio Hetz
- Center for Geroscience, Brain Health, and Metabolism, 70086 Santiago, Chile
- Buck Institute for Research on Aging, Novato, CA 94945, USA
- Faculty of Medicine, Biomedical Neuroscience Institute, University of Chile, 70086 Santiago, Chile
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, 70086 Santiago, Chile
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7
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Lemos FO, Bultynck G, Parys JB. A comprehensive overview of the complex world of the endo- and sarcoplasmic reticulum Ca 2+-leak channels. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2021; 1868:119020. [PMID: 33798602 DOI: 10.1016/j.bbamcr.2021.119020] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 03/09/2021] [Accepted: 03/13/2021] [Indexed: 12/11/2022]
Abstract
Inside cells, the endoplasmic reticulum (ER) forms the largest Ca2+ store. Ca2+ is actively pumped by the SERCA pumps in the ER, where intraluminal Ca2+-binding proteins enable the accumulation of large amount of Ca2+. IP3 receptors and the ryanodine receptors mediate the release of Ca2+ in a controlled way, thereby evoking complex spatio-temporal signals in the cell. The steady state Ca2+ concentration in the ER of about 500 μM results from the balance between SERCA-mediated Ca2+ uptake and the passive leakage of Ca2+. The passive Ca2+ leak from the ER is often ignored, but can play an important physiological role, depending on the cellular context. Moreover, excessive Ca2+ leakage significantly lowers the amount of Ca2+ stored in the ER compared to normal conditions, thereby limiting the possibility to evoke Ca2+ signals and/or causing ER stress, leading to pathological consequences. The so-called Ca2+-leak channels responsible for Ca2+ leakage from the ER are however still not well understood, despite over 20 different proteins have been proposed to contribute to it. This review has the aim to critically evaluate the available evidence about the various channels potentially involved and to draw conclusions about their relative importance.
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Affiliation(s)
- Fernanda O Lemos
- KU Leuven, Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine and Leuven Kanker Instituut, Campus Gasthuisberg O/N-1 B-802, Herestraat 49, B-3000 Leuven, Belgium
| | - Geert Bultynck
- KU Leuven, Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine and Leuven Kanker Instituut, Campus Gasthuisberg O/N-1 B-802, Herestraat 49, B-3000 Leuven, Belgium
| | - Jan B Parys
- KU Leuven, Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine and Leuven Kanker Instituut, Campus Gasthuisberg O/N-1 B-802, Herestraat 49, B-3000 Leuven, Belgium.
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8
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Alassaf M, Halloran MC. Pregnancy-associated plasma protein-aa regulates endoplasmic reticulum-mitochondria associations. eLife 2021; 10:59687. [PMID: 33759764 PMCID: PMC8024009 DOI: 10.7554/elife.59687] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 03/23/2021] [Indexed: 11/13/2022] Open
Abstract
Endoplasmic reticulum (ER) and mitochondria form close physical associations to facilitate calcium transfer, thereby regulating mitochondrial function. Neurons with high metabolic demands, such as sensory hair cells, are especially dependent on precisely regulated ER-mitochondria associations. We previously showed that the secreted metalloprotease pregnancy-associated plasma protein-aa (Pappaa) regulates mitochondrial function in zebrafish lateral line hair cells (Alassaf et al., 2019). Here, we show that pappaa mutant hair cells exhibit excessive and abnormally close ER-mitochondria associations, suggesting increased ER-mitochondria calcium transfer. pappaa mutant hair cells are more vulnerable to pharmacological induction of ER-calcium transfer. Additionally, pappaa mutant hair cells display ER stress and dysfunctional downstream processes of the ER-mitochondria axis including altered mitochondrial morphology and reduced autophagy. We further show that Pappaa influences ER-calcium transfer and autophagy via its ability to stimulate insulin-like growth factor-1 bioavailability. Together our results identify Pappaa as a novel regulator of the ER-mitochondria axis.
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Affiliation(s)
- Mroj Alassaf
- Department of Integrative Biology, University of Wisconsin, Madison, United States.,Department of Neuroscience, University of Wisconsin, Madison, United States.,Neuroscience Training Program, University of Wisconsin, Madison, United States
| | - Mary C Halloran
- Department of Integrative Biology, University of Wisconsin, Madison, United States.,Department of Neuroscience, University of Wisconsin, Madison, United States.,Neuroscience Training Program, University of Wisconsin, Madison, United States
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Aghaei M, Dastghaib S, Aftabi S, Aghanoori MR, Alizadeh J, Mokarram P, Mehrbod P, Ashrafizadeh M, Zarrabi A, McAlinden KD, Eapen MS, Sohal SS, Sharma P, Zeki AA, Ghavami S. The ER Stress/UPR Axis in Chronic Obstructive Pulmonary Disease and Idiopathic Pulmonary Fibrosis. Life (Basel) 2020; 11:1. [PMID: 33374938 PMCID: PMC7821926 DOI: 10.3390/life11010001] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/14/2020] [Accepted: 12/18/2020] [Indexed: 12/18/2022] Open
Abstract
Cellular protein homeostasis in the lungs is constantly disrupted by recurrent exposure to various external and internal stressors, which may cause considerable protein secretion pressure on the endoplasmic reticulum (ER), resulting in the survival and differentiation of these cell types to meet the increased functional demands. Cells are able to induce a highly conserved adaptive mechanism, known as the unfolded protein response (UPR), to manage such stresses. UPR dysregulation and ER stress are involved in numerous human illnesses, such as metabolic syndrome, fibrotic diseases, and neurodegeneration, and cancer. Therefore, effective and specific compounds targeting the UPR pathway are being considered as potential therapies. This review focuses on the impact of both external and internal stressors on the ER in idiopathic pulmonary fibrosis (IPF) and chronic obstructive pulmonary disease (COPD) and discusses the role of the UPR signaling pathway activation in the control of cellular damage and specifically highlights the potential involvement of non-coding RNAs in COPD. Summaries of pathogenic mechanisms associated with the ER stress/UPR axis contributing to IPF and COPD, and promising pharmacological intervention strategies, are also presented.
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Affiliation(s)
- Mahmoud Aghaei
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada; (M.A.); (S.A.); (J.A.)
- Department of Clinical Biochemistry, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan 8174673461, Iran
| | - Sanaz Dastghaib
- Department of Clinical Biochemistry, School of Medicine, Shiraz University of Medical Sciences, Shiraz 7134845794, Iran; (S.D.); (P.M.)
- Autophagy Research Center, Shiraz University of Medical Sciences, Shiraz 7134845794, Iran
| | - Sajjad Aftabi
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada; (M.A.); (S.A.); (J.A.)
- Medical Physics Department, Cancer Care Manitoba, University of Manitoba, Winnipeg, MB R3E 0V9, Canada
| | - Mohamad-Reza Aghanoori
- Division of Neurodegenerative Disorders, St Boniface Hospital Albrechtsen Research Centre, University of Manitoba, Winnipeg, MB R2H 2A6, Canada;
- Department of Internal Medicine, University of Manitoba, Winnipeg, MB R3E 0V9, Canada
| | - Javad Alizadeh
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada; (M.A.); (S.A.); (J.A.)
- Research Institute of Oncology and Hematology, Cancer Care Manitoba, University of Manitoba, Winnipeg, MB R3E 0V9, Canada
- Biology of Breathing Theme, Children Hospital Research Institute of Manitoba, University of Manitoba, Winnipeg, MB R3E 0V9, Canada
| | - Pooneh Mokarram
- Department of Clinical Biochemistry, School of Medicine, Shiraz University of Medical Sciences, Shiraz 7134845794, Iran; (S.D.); (P.M.)
- Autophagy Research Center, Shiraz University of Medical Sciences, Shiraz 7134845794, Iran
| | - Parvaneh Mehrbod
- Influenza and Respiratory Viruses Department, Pasteur Institute of Iran, Tehran 1316943551, Iran;
| | - Milad Ashrafizadeh
- Faculty of Engineering and Natural Sciences, Sabanci University, Orta Mahalle, Üniversite Caddesi No. 27, Orhanlı, Tuzla, 34956 Istanbul, Turkey;
- Sabanci University Nanotechnology Research and Application Center (SUNUM), Tuzla, 34956 Istanbul, Turkey;
| | - Ali Zarrabi
- Sabanci University Nanotechnology Research and Application Center (SUNUM), Tuzla, 34956 Istanbul, Turkey;
| | - Kielan Darcy McAlinden
- Respiratory Translational Research Group, Department of Laboratory Medicine, School of Health Sciences, University of Tasmania, Launceston 7250, Tasmania, Australia; (K.D.M.); (M.S.E.); (S.S.S.)
| | - Mathew Suji Eapen
- Respiratory Translational Research Group, Department of Laboratory Medicine, School of Health Sciences, University of Tasmania, Launceston 7250, Tasmania, Australia; (K.D.M.); (M.S.E.); (S.S.S.)
| | - Sukhwinder Singh Sohal
- Respiratory Translational Research Group, Department of Laboratory Medicine, School of Health Sciences, University of Tasmania, Launceston 7250, Tasmania, Australia; (K.D.M.); (M.S.E.); (S.S.S.)
| | - Pawan Sharma
- Center for Translational Medicine, Jane & Leonard Korman Respiratory Institute, Thomas Jefferson University, Philadelphia, PA 19107, USA;
| | - Amir A. Zeki
- Davis School of Medicine, Department of Internal Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine, UC Davis Lung Center, University of California, Davis, CA 95616, USA;
- Veterans Affairs Medical Center, Mather, CA 95655, USA
| | - Saeid Ghavami
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada; (M.A.); (S.A.); (J.A.)
- Autophagy Research Center, Shiraz University of Medical Sciences, Shiraz 7134845794, Iran
- Research Institute of Oncology and Hematology, Cancer Care Manitoba, University of Manitoba, Winnipeg, MB R3E 0V9, Canada
- Biology of Breathing Theme, Children Hospital Research Institute of Manitoba, University of Manitoba, Winnipeg, MB R3E 0V9, Canada
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10
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Structure and regulation of the BsYetJ calcium channel in lipid nanodiscs. Proc Natl Acad Sci U S A 2020; 117:30126-30134. [PMID: 33208533 DOI: 10.1073/pnas.2014094117] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BsYetJ is a bacterial homolog of transmembrane BAX inhibitor-1 motif-containing 6 (TMBIM6) membrane protein that plays a key role in the control of calcium homeostasis. However, the BsYetJ (or TMBIM6) structure embedded in a lipid bilayer is uncharacterized, let alone the molecular mechanism of the calcium transport activity. Herein, we report structures of BsYetJ in lipid nanodiscs identified by double electron-electron resonance spectroscopy. Our results reveal that BsYetJ in lipid nanodiscs is structurally different from those crystallized in detergents. We show that BsYetJ conformation is pH-sensitive in apo state (lacking calcium), whereas in a calcium-containing solution it is stuck in an intermediate, inert to pH changes. Only when the transmembrane calcium gradient is established can the calcium-release activity of holo-BsYetJ occur and be mediated by pH-dependent conformational changes, suggesting a dual gating mechanism. Conformational substates involved in the process and a key residue D171 relevant to the gating of calcium are identified. Our study suggests that BsYetJ/TMBIM6 is a pH-dependent, voltage-gated calcium channel.
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11
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K V A, Madhana RM, Bais AK, Singh VB, Malik A, Sinha S, Lahkar M, Kumar P, Samudrala PK. Cognitive Improvement by Vorinostat through Modulation of Endoplasmic Reticulum Stress in a Corticosterone-Induced Chronic Stress Model in Mice. ACS Chem Neurosci 2020; 11:2649-2657. [PMID: 32673474 DOI: 10.1021/acschemneuro.0c00315] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Chronic stress is the leading cause of memory impairment today. Various stress-based models are being developed for studying cognitive impairment. Repurposing of existing drugs in a new pharmacology class is the safest and cheapest option for treatment instead of new drug discovery. Vorinostat (VOR) is the first histone deacetylase (HDAC) inhibitor approved for the treatment of cutaneous T-cell lymphoma by the U.S. FDA. VOR follows the rule of five and is reported to cross the blood-brain barrier. Therefore, we aimed to evaluate the procognitive potential of VOR (25 mg/kg) administered by intraperitoneal (ip) route in a stress-based model of chronic corticosterone (CORT) injections (20 mg/kg, subcutaneously (sc)). The study comprised six groups. Normal mice were administered vehicle (VEH) (days 1-21, sc) in the first group, VOR (days 8-21, 25 mg/kg, ip) in the second group, and fluoxetine (FLX) (days 8-21, 15 mg/kg, oral) in the third group. Mice in the remaining three groups were given 20 mg/kg (sc) CORT for 21 days, and VOR (days 8-21, 25 mg/kg, ip) or FLX (days 8-21, 15 mg/kg, oral) was additionally administered to the treatment groups. Behavioral tests such as Morris water maze test, novel object recognition test, and object in place test were performed at the end of the dosing schedule to assess cognition. After behavior tests, mice were sacrificed, and hippocampus was separated from brain tissue for reverse transcriptase polymerase chain reaction (RT-PCR), Western blot, and immunohistochemistry studies. VOR treatment attenuated endoplasmic reticulum (ER) stress in CORT mice as evident from the reduction in DNA damage-inducible transcript 3 (Ddit3) (gene encoding CHOP), caspase 12 (Casp12), and calpain-2 (Capn2) mRNA levels, and cleaved caspase 3 (CASP3) protein expression. Bax inhibitor-1 (BI-1) was significantly increased in VOR-treated CORT mice. VOR also reversed CORT induced increase in HDAC2 level in the CA3 region. The protective effects of VOR were comparable to that of FLX in CORT mice. Thus, VOR has the potential to reverse cognitive dysfunction via modulation of ER stress markers and HDAC2.
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Affiliation(s)
- Athira K V
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Mirza, Kamrup, 781125 Assam, India
- Department of Pharmacology, Amrita School of Pharmacy, Amrita Vishwa Vidyapeetham, AIMS Health Sciences Campus, Kochi, 682041 Kerala, India
| | - Rajaram Mohanrao Madhana
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Mirza, Kamrup, 781125 Assam, India
| | - Akhilesh Kumar Bais
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Mirza, Kamrup, 781125 Assam, India
| | - Vijay Bahadur Singh
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Mirza, Kamrup, 781125 Assam, India
| | - Arpit Malik
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Mirza, Kamrup, 781125 Assam, India
| | - Swapnil Sinha
- DST WOS-A Scientist, Department of Biotechnology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Mirza, Kamrup, 781125 Assam, India
| | - Mangala Lahkar
- Department of Pharmacology, Gauhati Medical College, Guwahati, 781032 Assam, India
| | - Pramod Kumar
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER), Guwahati, 781125 Assam, India
| | - Pavan Kumar Samudrala
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Mirza, Kamrup, 781125 Assam, India
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12
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Andhavarapu S, Katuri A, Bryant J, Patel V, Gupta U, Asemu G, Makar TK. Intersecting roles of ER stress, mitochondrial dysfunction, autophagy, and calcium homeostasis in HIV-associated neurocognitive disorder. J Neurovirol 2020; 26:664-675. [PMID: 32804309 DOI: 10.1007/s13365-020-00861-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 04/22/2020] [Accepted: 05/19/2020] [Indexed: 01/04/2023]
Abstract
HIV-associated neurocognitive disorder (HAND) is a collective term describing the spectrum of neurocognitive deficits that arise from HIV infection. Although the introduction to highly active antiretroviral therapy (HAART) has prolonged the lifespan of HIV patients, neurocognitive impairments remain prevalent, as patients are left perpetually with HIV. Currently, physicians face a challenge in treating HAND patients, so a greater understanding of the mechanisms underlying HAND pathology has been a growing focus in HIV research. Recent research has revealed the role disrupted calcium homeostasis in HIV-mediated neurotoxicity. Calcium plays a well-established role in the crosstalk between the mitochondrion and ER as well as in regulating autophagy, and ER stress, mitochondrial dysfunction, and impaired autophagic activity are considered hallmarks in several neurodegenerative and neurocognitive disorders. Therefore, it is paramount that the intricate inter-organelle signaling in relation to calcium homeostasis during HIV infection and the development of HAND is elucidated. This review consolidates current knowledge regarding the neuropathology of neurocognitive disorders and HIV infection with a focus on the underlying role of calcium during ER stress, mitochondrial dysfunction, and autophagy associated with the progression of HAND. The details of this intricate crosstalk during HAND remain relatively unknown; further research in this field can potentially aid in the development of improved therapy for patients suffering from HAND.
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Affiliation(s)
- Sanketh Andhavarapu
- Institute of Human Virology, University of Maryland, 725 W Lombard St, Baltimore, MD, 21201, USA
| | - Akhil Katuri
- Institute of Human Virology, University of Maryland, 725 W Lombard St, Baltimore, MD, 21201, USA
| | - Joseph Bryant
- Institute of Human Virology, University of Maryland, 725 W Lombard St, Baltimore, MD, 21201, USA
| | - Vivek Patel
- Institute of Human Virology, University of Maryland, 725 W Lombard St, Baltimore, MD, 21201, USA
| | - Udit Gupta
- Institute of Human Virology, University of Maryland, 725 W Lombard St, Baltimore, MD, 21201, USA
| | - Girma Asemu
- Institute of Human Virology, University of Maryland, 725 W Lombard St, Baltimore, MD, 21201, USA
| | - Tapas K Makar
- Institute of Human Virology, University of Maryland, 725 W Lombard St, Baltimore, MD, 21201, USA. .,VA Medical Center, Baltimore, MD, 21201, USA.
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13
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Aguayo-Ortiz R, Espinoza-Fonseca LM. Linking Biochemical and Structural States of SERCA: Achievements, Challenges, and New Opportunities. Int J Mol Sci 2020; 21:ijms21114146. [PMID: 32532023 PMCID: PMC7313052 DOI: 10.3390/ijms21114146] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/05/2020] [Accepted: 06/08/2020] [Indexed: 02/07/2023] Open
Abstract
Sarcoendoplasmic reticulum calcium ATPase (SERCA), a member of the P-type ATPase family of ion and lipid pumps, is responsible for the active transport of Ca2+ from the cytoplasm into the sarcoplasmic reticulum lumen of muscle cells, into the endoplasmic reticulum (ER) of non-muscle cells. X-ray crystallography has proven to be an invaluable tool in understanding the structural changes of SERCA, and more than 70 SERCA crystal structures representing major biochemical states (defined by bound ligand) have been deposited in the Protein Data Bank. Consequently, SERCA is one of the best characterized components of the calcium transport machinery in the cell. Emerging approaches in the field, including spectroscopy and molecular simulation, now help integrate and interpret this rich structural information to understand the conformational transitions of SERCA that occur during activation, inhibition, and regulation. In this review, we provide an overview of the crystal structures of SERCA, focusing on identifying metrics that facilitate structure-based categorization of major steps along the catalytic cycle. We examine the integration of crystallographic data with different biophysical approaches and computational methods to link biochemical and structural states of SERCA that are populated in the cell. Finally, we discuss the challenges and new opportunities in the field, including structural elucidation of functionally important and novel regulatory complexes of SERCA, understanding the structural basis of functional divergence among homologous SERCA regulators, and bridging the gap between basic and translational research directed toward therapeutic modulation of SERCA.
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14
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Philippaert K, Roden M, Lisak D, Bueno D, Jelenik T, Radyushkin K, Schacht T, Mesuere M, Wüllner V, Herrmann AK, Baumgart J, Vennekens R, Methner A. Bax inhibitor-1 deficiency leads to obesity by increasing Ca 2+-dependent insulin secretion. J Mol Med (Berl) 2020; 98:849-862. [PMID: 32394396 PMCID: PMC7297831 DOI: 10.1007/s00109-020-01914-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 04/14/2020] [Accepted: 04/21/2020] [Indexed: 12/28/2022]
Abstract
Abstract Transmembrane BAX inhibitor motif containing 6 (TMBIM6), also known as Bax inhibitor-1, is an evolutionarily conserved protein involved in endoplasmic reticulum (ER) function. TMBIM6 is an ER Ca2+ leak channel and its deficiency enhances susceptibility to ER stress due to inhibition of the ER stress sensor IRE1α. It was previously shown that TMBIM6 overexpression improves glucose metabolism and that TMBIM6 knockout mice develop obesity. We here examined the metabolic alterations underlying the obese phenotype and subjected TMBIM6 knockout mice to indirect calorimetry and euglycemic-hyperinsulinemic tests with stable isotope dilution to gauge tissue-specific insulin sensitivity. This demonstrated no changes in heat production, food intake, activity or hepatic and peripheral insulin sensitivity. TMBIM6 knockout mice, however, featured a higher glucose-stimulated insulin secretion in vivo as assessed by the hyperglycemic clamp test and hepatic steatosis. This coincided with profound changes in glucose-mediated Ca2+ regulation in isolated pancreatic β cells and increased levels of IRE1α levels but no differences in downstream effects of IRE1α like increased Xbp1 mRNA splicing or Ire1-dependent decay of insulin mRNA in the pancreas. We therefore conclude that lack of TMBIM6 does not affect insulin sensitivity but leads to hyperinsulinemia, which serves to explain the weight gain. TMBIM6-mediated metabolic alterations are mainly caused by its role as a Ca2+ release channel in the ER. Key messages TMBIM6−/− leads to obesity and hepatic steatosis. Food intake and energy expenditure are not changed in TMBIM6−/− mice. No changes in insulin resistance in TMBIM6−/− mice. Increased insulin secretion caused by altered calcium dynamics in β cells.
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Affiliation(s)
- Koenraad Philippaert
- Laboratory of Ion Channel Research, VIB Center for Brain & Disease Research, Leuven, Belgium.,Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Michael Roden
- Division of Endocrinology and Diabetology, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany. .,Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, Düsseldorf, Germany. .,German Center for Diabetes Research (DZD), München-Neuherberg, Germany.
| | - Dmitrij Lisak
- Institute for Molecular Medicine of the University Medical Center, Johannes Gutenberg University, Mainz, Germany
| | - Diones Bueno
- Institute for Molecular Medicine of the University Medical Center, Johannes Gutenberg University, Mainz, Germany
| | - Tomas Jelenik
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, Düsseldorf, Germany.,German Center for Diabetes Research (DZD), München-Neuherberg, Germany
| | | | - Teresa Schacht
- Institute for Molecular Medicine of the University Medical Center, Johannes Gutenberg University, Mainz, Germany
| | - Margot Mesuere
- Laboratory of Ion Channel Research, VIB Center for Brain & Disease Research, Leuven, Belgium.,Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Verena Wüllner
- Institute for Molecular Medicine of the University Medical Center, Johannes Gutenberg University, Mainz, Germany
| | - Ann-Kathrin Herrmann
- Institute for Molecular Medicine of the University Medical Center, Johannes Gutenberg University, Mainz, Germany
| | - Jan Baumgart
- Translational Animal Research Center, The Johannes Gutenberg University, Mainz, Germany
| | - Rudi Vennekens
- Laboratory of Ion Channel Research, VIB Center for Brain & Disease Research, Leuven, Belgium.,Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Axel Methner
- Institute for Molecular Medicine of the University Medical Center, Johannes Gutenberg University, Mainz, Germany.
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15
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Li S, Hao M, Li B, Chen M, Chen J, Tang J, Hong S, Min J, Hu M, Hong L. CACNA1H downregulation induces skeletal muscle atrophy involving endoplasmic reticulum stress activation and autophagy flux blockade. Cell Death Dis 2020; 11:279. [PMID: 32332705 PMCID: PMC7181873 DOI: 10.1038/s41419-020-2484-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 04/10/2020] [Indexed: 02/06/2023]
Abstract
Multiple vaginal delivery (MVD) is an important factor for pelvic floor muscle (PFM) function decline and pelvic floor dysfunction (PFD). PFD is common in middle-aged and elderly women, but its pathogenesis is not clear. In this study, we found that the expression of CACNA1H was lower in the PFM of old mice after MVD compared with old or adult mice. In in-vitro studies, we found that treatment with the T-type Ca2+ channel (T-channel) inhibitor NNC-55 or downregulation of the CACNA1H gene by siRNA intervention promoted myotube atrophy and apoptosis. Mechanistically, we revealed that NNC-55 increased the expression of GRP78 and DDIT3 in myotubes, indicating endoplasmic reticulum stress (ERS) activation, and that the IRE1 and PERK pathways might be involved in this effect. NNC-55 induced the formation of autophagosomes but inhibited autophagy flux. Moreover, rapamycin, an autophagy activator, did not rescue myotube atrophy or apoptosis induced by NNC-55, and the autophagy inhibitors 3-MA and HCQ accelerated this damage. Further studies showed that the ERS inhibitors 4-PBA and TUDAC relieved NNC-55-induced damage and autophagy flux blockade. Finally, we found multisite muscle atrophy and decreased muscle function in Cacna1h−/− (TH-null) mice, as well as increased autophagy inhibition and apoptotic signals in the PFM of old WT mice after MVD and TH-null mice. Taken together, our results suggest that MVD-associated PFD is partially attributed to CACNA1H downregulation-induced PFM atrophy and that ERS is a potential therapeutic target for this disease.
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Affiliation(s)
- Suting Li
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, People's Republic of China
| | - Menglei Hao
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, People's Republic of China
| | - Bingshu Li
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, People's Republic of China
| | - Mao Chen
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, People's Republic of China
| | - Jue Chen
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, People's Republic of China
| | - Jianming Tang
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, People's Republic of China
| | - Shasha Hong
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, People's Republic of China
| | - Jie Min
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, People's Republic of China
| | - Ming Hu
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, People's Republic of China
| | - Li Hong
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, People's Republic of China.
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16
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Kim HK, Lee GH, Bhattarai KR, Lee MS, Back SH, Kim HR, Chae HJ. TMBIM6 (transmembrane BAX inhibitor motif containing 6) enhances autophagy through regulation of lysosomal calcium. Autophagy 2020; 17:761-778. [PMID: 32167007 PMCID: PMC8032251 DOI: 10.1080/15548627.2020.1732161] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Lysosomal Ca2+ contributes to macroautophagy/autophagy, an intracellular process for the degradation of cytoplasmic material and organelles in the lysosomes to protect cells against stress responses. TMBIM6 (transmembrane BAX inhibitor motif containing 6) is a Ca2+ channel-like protein known to regulate ER stress response and apoptosis. In this study, we examined the as yet unknown role of TMBIM6 in regulating lysosomal Ca2+ levels. The Ca2+ efflux from the ER through TMBIM6 was found to increase the resting lysosomal Ca2+ level, in which ITPR-independent regulation of Ca2+ status was observed. Further, TMBIM6 regulated the local release of Ca2+ through lysosomal MCOLN1/TRPML1 channels under nutrient starvation or MTOR inhibition. The local Ca2+ efflux through MCOLN1 channels was found to activate PPP3/calcineurin, triggering TFEB (transcription factor EB) nuclear translocation, autophagy induction, and lysosome biogenesis. Upon genetic inactivation of TMBIM6, lysosomal Ca2+ and the associated TFEB nuclear translocation were decreased. Furthermore, autophagy flux was significantly enhanced in the liver or kidney from starved Tmbim6+/+ mice compared with that in the counter tmbim6-/- mice. Together, our observations indicated that under stress conditions, TMBIM6 increases lysosomal Ca2+ release, leading to PPP3/calcineurin-mediated TFEB activation and subsequently enhanced autophagy. Thus, TMBIM6, an ER membrane protein, is suggested to be a lysosomal Ca2+ modulator that coordinates with autophagy to alleviate metabolism stress.Abbreviations: AVs: autophagic vacuoles; CEPIA: calcium-measuring organelle-entrapped protein indicator; ER: endoplasmic reticulum; GPN: glycyl-L-phenylalanine-beta-naphthylamide; ITPR/IP3R: inositol 1,4,5-trisphosphate receptor; LAMP1: lysosomal associated membrane protein 1; MCOLN/TRPML: mucolipin; MEF: mouse embryonic fibroblast; ML-SA1: mucolipin synthetic agonist 1; MTORC1: mechanistic target of rapamycin kinase complex 1; RPS6KB1: ribosomal protein S6 kinase B1; SQSTM1: sequestosome 1; TFEB: transcription factor EB; TKO: triple knockout; TMBIM6/BI-1: transmembrane BAX inhibitor motif containing 6.
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Affiliation(s)
- Hyun-Kyoung Kim
- Department of Pharmacology and New Drug Development Research Institute, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Geum-Hwa Lee
- Department of Pharmacology and New Drug Development Research Institute, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Kashi Raj Bhattarai
- Department of Pharmacology and New Drug Development Research Institute, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Myung-Shik Lee
- Severance Biomedical Science Institute and Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Sung Hoon Back
- School of Biological Sciences, University of Ulsan, Ulsan, Republic of Korea
| | - Hyung-Ryong Kim
- College of Dentistry, Dankook University, Cheonan, Republic of Korea
| | - Han-Jung Chae
- Department of Pharmacology and New Drug Development Research Institute, Chonbuk National University Medical School, Jeonju, Republic of Korea
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17
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Rosa N, Sneyers F, Parys JB, Bultynck G. Type 3 IP 3 receptors: The chameleon in cancer. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2020; 351:101-148. [PMID: 32247578 DOI: 10.1016/bs.ircmb.2020.02.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Inositol 1,4,5-trisphosphate (IP3) receptors (IP3Rs), intracellular calcium (Ca2+) release channels, fulfill key functions in cell death and survival processes, whose dysregulation contributes to oncogenesis. This is essentially due to the presence of IP3Rs in microdomains of the endoplasmic reticulum (ER) in close proximity to the mitochondria. As such, IP3Rs enable efficient Ca2+ transfers from the ER to the mitochondria, thus regulating metabolism and cell fate. This review focuses on one of the three IP3R isoforms, the type 3 IP3R (IP3R3), which is linked to proapoptotic ER-mitochondrial Ca2+ transfers. Alterations in IP3R3 expression have been highlighted in numerous cancer types, leading to dysregulations of Ca2+ signaling and cellular functions. However, the outcome of IP3R3-mediated Ca2+ transfers for mitochondrial function is complex with opposing effects on oncogenesis. IP3R3 can either suppress cancer by promoting cell death and cellular senescence or support cancer by driving metabolism, anabolic processes, cell cycle progression, proliferation and invasion. The aim of this review is to provide an overview of IP3R3 dysregulations in cancer and describe how such dysregulations alter critical cellular processes such as proliferation or cell death and survival. Here, we pose that the IP3R3 isoform is not only linked to proapoptotic ER-mitochondrial Ca2+ transfers but might also be involved in prosurvival signaling.
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Affiliation(s)
- Nicolas Rosa
- KU Leuven, Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine and Leuven Kanker Instituut (LKI), Leuven, Belgium
| | - Flore Sneyers
- KU Leuven, Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine and Leuven Kanker Instituut (LKI), Leuven, Belgium
| | - Jan B Parys
- KU Leuven, Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine and Leuven Kanker Instituut (LKI), Leuven, Belgium
| | - Geert Bultynck
- KU Leuven, Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine and Leuven Kanker Instituut (LKI), Leuven, Belgium.
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18
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DNA-PKcs promotes cardiac ischemia reperfusion injury through mitigating BI-1-governed mitochondrial homeostasis. Basic Res Cardiol 2020; 115:11. [PMID: 31919590 DOI: 10.1007/s00395-019-0773-7] [Citation(s) in RCA: 98] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 12/27/2019] [Indexed: 01/24/2023]
Abstract
DNA-dependent protein kinase catalytic subunit (DNA-PKcs) is a novel inducer to promote mitochondrial apoptosis and suppress tumor growth in a variety of cells although its role in cardiovascular diseases remains obscure. This study was designed to examine the role of DNA-PKcs in cardiac ischemia reperfusion (IR) injury and mitochondrial damage. Cardiomyocyte-specific DNA-PKcs knockout (DNA-PKcsCKO) mice were subjected to IR prior to assessment of myocardial function and mitochondrial apoptosis. Our data revealed that IR challenge, hypoxia-reoxygenation (HR) or H2O2-activated DNA-PKcs through post-transcriptional phosphorylation in murine hearts or cardiomyocytes. Mice deficient in DNA-PKcs in cardiomyocytes were protected against cardiomyocyte death, infarct area expansion and cardiac dysfunction. DNA-PKcs ablation countered IR- or HR-induced oxidative stress, mPTP opening, mitochondrial fission, mitophagy failure and Bax-mediated mitochondrial apoptosis, possibly through suppression of Bax inhibitor-1 (BI-1) activity. A direct association between DNA-PKcs and BI-1 was noted where DNA-PKcs had little effect on BI-1 transcription but interacted with BI-1 to promote its degradation. Loss of DNA-PKcs stabilized BI-1, thus offering resistance of mitochondria and cardiomyocytes against IR insult. Moreover, DNA-PKcs ablation-induced beneficial cardioprotection against IR injury was mitigated by concurrent knockout of BI-1. Double deletion of DNA-PKcs and BI-1 failed to exert protection against global IR injury and mitochondrial damage, confirming a permissive role of BI-1 in DNA-PKcs deletion-elicited cardioprotection against IR injury. DNA-PKcs serves as a novel causative factor for mitochondrial damage via suppression of BI-1, en route to the onset and development of cardiac IR injury.
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19
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Lebeaupin C, Blanc M, Vallée D, Keller H, Bailly-Maitre B. BAX inhibitor-1: between stress and survival. FEBS J 2020; 287:1722-1736. [PMID: 31841271 DOI: 10.1111/febs.15179] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 11/18/2019] [Accepted: 12/13/2019] [Indexed: 12/13/2022]
Abstract
Cellular gatekeepers are essential to maintain order within a cell and anticipate signals of stress to promote survival. BCL2 associated X, apoptosis regulator (BAX) inhibitor-1 (BI-1), also named transmembrane BAX inhibitor motif containing-6, is a highly conserved endoplasmic reticulum (ER) transmembrane protein. Originally identified as an inhibitor of BAX-induced apoptosis, its pro-survival properties have been expanded to include functions targeted against ER stress, calcium imbalance, reactive oxygen species accumulation, and metabolic dysregulation. Nevertheless, the structural biology and biochemical mechanism of action of BI-1 are still under debate. BI-1 has been implicated in several diseases, including chronic liver disease, diabetes, ischemia/reperfusion injury, neurodegeneration, and cancer. While most studies have demonstrated a beneficial role for BI-1 in the ubiquitous maintenance of cellular homeostasis, its expression in cancer cells seems most often to contribute to tumorigenesis and metastasis. Here, we summarize what is known about BI-1 and encourage future studies on BI-1's contribution to cellular life and death decisions to advocate its potential as a target for drug development and other therapeutic strategies.
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Affiliation(s)
- Cynthia Lebeaupin
- INSERM U1065, C3M, Université Côte d'Azur, Nice, France.,Degenerative Diseases Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA.,Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Marina Blanc
- INSERM U1065, C3M, Université Côte d'Azur, Nice, France
| | | | - Harald Keller
- INRA1355-CNRS7254, Université Côte d'Azur, Sophia Antipolis, France
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20
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Wang J, Zhu P, Li R, Ren J, Zhang Y, Zhou H. Bax inhibitor 1 preserves mitochondrial homeostasis in acute kidney injury through promoting mitochondrial retention of PHB2. Theranostics 2020; 10:384-397. [PMID: 31903127 PMCID: PMC6929616 DOI: 10.7150/thno.40098] [Citation(s) in RCA: 111] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Accepted: 09/13/2019] [Indexed: 12/21/2022] Open
Abstract
Bax inhibitor-1 (BI1) conveys anti-apoptotic signals for mitochondria while prohibitin 2 (PHB2) is implicated in sustaining mitochondrial morphology and function. However, their regulatory roles in acute kidney injury (AKI) are largely unknown. Methods: In human patients with AKI, levels of BI1 in urine and plasma were determined using ELISA. An experimental model of AKI was established using ATP depletion-mediated metabolic stress and ischemia-reperfusion injury (IRI) in primary tubule cells and BI1 transgenic mice, respectively. Western blots, ELISA, qPCR, immunofluorescence, RNA silencing, and domain deletion assay were employed to evaluate the roles of BI1 and PHB2 in the preservation of mitochondrial integrity. Results: Levels of BI1 in urine and plasma were decreased in patients with AKI and its expression correlated inversely with renal function. However, reconstitution of BI1 in a murine AKI model was capable of alleviating renal failure, inflammation and tubular death. Further molecular scrutiny revealed that BI1 preserved mitochondrial genetic integrity, reduced mitochondrial oxidative stress, promoted mitochondrial respiration, inhibited excessive mitochondrial fission, improved mitophagy and suppressed mitochondrial apoptosis. Intriguingly, levels of the mitochondria-localized PHB2 were sustained by BI1 and knockdown of PHB2 abolished the mitochondrial- and renal- protective properties of BI1. Furthermore, BI1 promoted PHB2 retention within mitochondria through direct interaction with cytoplasmic PHB2 to facilitate its mitochondrial import. This was confirmed by the observation that the C-terminus of BI1 and the PHB domain of PHB2 were required for the BI1-PHB2 cross-linking. Conclusion: Our data have unveiled an essential role of BI1 as a master regulator of renal tubule function through sustaining mitochondrial localization of PHB2, revealing novel therapeutic promises against AKI.
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21
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Picca A, Mankowski RT, Burman JL, Donisi L, Kim JS, Marzetti E, Leeuwenburgh C. Mitochondrial quality control mechanisms as molecular targets in cardiac ageing. Nat Rev Cardiol 2019; 15:543-554. [PMID: 30042431 DOI: 10.1038/s41569-018-0059-z] [Citation(s) in RCA: 206] [Impact Index Per Article: 41.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Cardiovascular disease is the leading cause of morbidity and mortality worldwide. Advancing age is a major risk factor for developing cardiovascular disease because of the lifelong exposure to cardiovascular risk factors and specific alterations affecting the heart and the vasculature during ageing. Indeed, the ageing heart is characterized by structural and functional changes that are caused by alterations in fundamental cardiomyocyte functions. In particular, the myocardium is heavily dependent on mitochondrial oxidative metabolism and is especially susceptible to mitochondrial dysfunction. Indeed, primary alterations in mitochondrial function, which are subsequently amplified by defective quality control mechanisms, are considered to be major contributing factors to cardiac senescence. In this Review, we discuss the mechanisms linking defective mitochondrial quality control mechanisms (that is, proteostasis, biogenesis, dynamics, and autophagy) to organelle dysfunction in the context of cardiac ageing. We also illustrate relevant molecular pathways that might be exploited for the prevention and treatment of age-related heart dysfunction.
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Affiliation(s)
- Anna Picca
- Department of Geriatrics, Neuroscience and Orthopedics, Teaching Hospital "Agostino Gemelli", Catholic University of the Sacred Heart School of Medicine, Rome, Italy
| | - Robert T Mankowski
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Jonathon L Burman
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA.,National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Luca Donisi
- Department of Geriatrics, Neuroscience and Orthopedics, Teaching Hospital "Agostino Gemelli", Catholic University of the Sacred Heart School of Medicine, Rome, Italy.,Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Jae-Sung Kim
- Department of Surgery, University of Florida, Gainesville, FL, USA
| | - Emanuele Marzetti
- Department of Geriatrics, Neuroscience and Orthopedics, Teaching Hospital "Agostino Gemelli", Catholic University of the Sacred Heart School of Medicine, Rome, Italy.
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22
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Mochan S, Dhingra MK, Gupta SK, Saxena S, Arora P, Yadav V, Rani N, Luthra K, Dwivedi S, Bhatla N, Dhingra R. Status of VEGF in preeclampsia and its effect on endoplasmic reticulum stress in placental trophoblast cells. Eur J Obstet Gynecol Reprod Biol X 2019; 4:100070. [PMID: 31517301 PMCID: PMC6728727 DOI: 10.1016/j.eurox.2019.100070] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Revised: 05/18/2019] [Accepted: 06/11/2019] [Indexed: 11/19/2022] Open
Abstract
Objective To explore the role of VEGF in attenuating endoplasmic reticulum stress in placental trophoblast cells. Study design Study was divided into following parts: 1. Serum Analysis of GRP78 and VEGF using sandwich ELISA. 2. Expression of VEGF and GRP78 in placentae by immunohistochemistry (IHC). 3. In Vitro experiments. Status of ER stress markers (GRP78, eIF2α, XBP1, ATF6 and CHOP) was assessed at various time points (8 h, 14 h, 24 h) when trophoblast cells were treated with varying concentration(s) of VEGF and also by adding recombinant VEGF at protein (Immunofluorescence, Western blot) and transcript levels (qRT-PCR). Results Increased GRP78 and decreased VEGF protein levels in sera and placentae of preeclamptic pregnant women and reduced expression of various ER stress markers at both transcript and protein levels was observed in trophoblast cells when they were exposed to recombinant VEGF thereby indicating positive role of VEGF in alleviating ER stress. Conclusions Reduced expression of ER stress markers in trophoblast cells against increased VEGF highlighted a new window to explore prospective drugs that can be designed to modulate the activities of various ER stress sensors in order to alleviate ER stress in pregnant women with preeclampsia.
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Affiliation(s)
- Sankat Mochan
- Department of Anatomy, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India
- Corresponding authors.
| | - Manoj Kumar Dhingra
- Department of Community Medicine, NC Medical college and hospital, Israna, Panipat, Haryana, 132107, India
| | - Sunil Kumar Gupta
- Department of Anatomy, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India
| | - Shobhit Saxena
- Department of Anatomy, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India
| | - Pallavi Arora
- Department of Anatomy, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India
| | - Vineeta Yadav
- Department of Anatomy, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India
| | - Neerja Rani
- Department of Anatomy, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India
| | - Kalpana Luthra
- Department of Biochemistry, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India
| | - Sadanand Dwivedi
- Department of Biostatistics, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India
| | - Neerja Bhatla
- Department of Obstetrics and Gynaecology, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India
| | - Renu Dhingra
- Department of Anatomy, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India
- Corresponding authors.
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23
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The Best for the Most Important: Maintaining a Pristine Proteome in Stem and Progenitor Cells. Stem Cells Int 2019; 2019:1608787. [PMID: 31191665 PMCID: PMC6525796 DOI: 10.1155/2019/1608787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 03/05/2019] [Indexed: 12/19/2022] Open
Abstract
Pluripotent stem cells give rise to reproductively enabled offsprings by generating progressively lineage-restricted multipotent stem cells that would differentiate into lineage-committed stem and progenitor cells. These lineage-committed stem and progenitor cells give rise to all adult tissues and organs. Adult stem and progenitor cells are generated as part of the developmental program and play critical roles in tissue and organ maintenance and/or regeneration. The ability of pluripotent stem cells to self-renew, maintain pluripotency, and differentiate into a multicellular organism is highly dependent on sensing and integrating extracellular and extraorganismal cues. Proteins perform and integrate almost all cellular functions including signal transduction, regulation of gene expression, metabolism, and cell division and death. Therefore, maintenance of an appropriate mix of correctly folded proteins, a pristine proteome, is essential for proper stem cell function. The stem cells' proteome must be pristine because unfolded, misfolded, or otherwise damaged proteins would interfere with unlimited self-renewal, maintenance of pluripotency, differentiation into downstream lineages, and consequently with the development of properly functioning tissue and organs. Understanding how various stem cells generate and maintain a pristine proteome is therefore essential for exploiting their potential in regenerative medicine and possibly for the discovery of novel approaches for maintaining, propagating, and differentiating pluripotent, multipotent, and adult stem cells as well as induced pluripotent stem cells. In this review, we will summarize cellular networks used by various stem cells for generation and maintenance of a pristine proteome. We will also explore the coordination of these networks with one another and their integration with the gene regulatory and signaling networks.
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24
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Guo G, Xu M, Chang Y, Luyten T, Seitaj B, Liu W, Zhu P, Bultynck G, Shi L, Quick M, Liu Q. Ion and pH Sensitivity of a TMBIM Ca 2+ Channel. Structure 2019; 27:1013-1021.e3. [PMID: 30930064 PMCID: PMC6560632 DOI: 10.1016/j.str.2019.03.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Revised: 01/25/2019] [Accepted: 02/28/2019] [Indexed: 12/12/2022]
Abstract
The anti-apoptotic transmembrane Bax inhibitor motif (TMBIM) containing protein family regulates Ca2+ homeostasis, cell death, and the progression of diseases including cancers. The recent crystal structures of the TMBIM homolog BsYetJ reveal a conserved Asp171-Asp195 dyad that is proposed in regulating a pH-dependent Ca2+ translocation. Here we show that BsYetJ mediates Ca2+ fluxes in permeabilized mammalian cells, and its interaction with Ca2+ is sensitive to protons and other cations. We report crystal structures of BsYetJ in additional states, revealing the flexibility of the dyad in a closed state and a pore-opening mechanism. Functional studies show that the dyad is responsible for both Ca2+ affinity and pH dependence. Computational simulations suggest that protonation of Asp171 weakens its interaction with Arg60, leading to an open state. Our integrated analysis provides insights into the regulation of the BsYetJ Ca2+ channel that may inform understanding of human TMBIM proteins regarding their roles in cell death and diseases.
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Affiliation(s)
- Gongrui Guo
- Biology Department, Brookhaven National Laboratory, Upton, NY 11973, USA; NSLS-II, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Min Xu
- Computational Chemistry and Molecular Biophysics Unit, National Institute on Drug Abuse - Intramural Research Program, National Institutes of Health, Baltimore, MA 21224, USA
| | - Yanqi Chang
- New York Consortium on Membrane Protein Structure, New York Structural Biology Center, New York, NY 10027, USA
| | - Tomas Luyten
- Laboratory Molecular and Cellular Signaling, Department Cellular and Molecular Medicine, Campus Gasthuisberg O/N-I Bus 802, Herestraat 49 3000 Leuven, Belgium
| | - Bruno Seitaj
- Laboratory Molecular and Cellular Signaling, Department Cellular and Molecular Medicine, Campus Gasthuisberg O/N-I Bus 802, Herestraat 49 3000 Leuven, Belgium
| | - Wu Liu
- Biology Department, Brookhaven National Laboratory, Upton, NY 11973, USA; NSLS-II, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Ping Zhu
- Biology Department, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Geert Bultynck
- Laboratory Molecular and Cellular Signaling, Department Cellular and Molecular Medicine, Campus Gasthuisberg O/N-I Bus 802, Herestraat 49 3000 Leuven, Belgium
| | - Lei Shi
- Computational Chemistry and Molecular Biophysics Unit, National Institute on Drug Abuse - Intramural Research Program, National Institutes of Health, Baltimore, MA 21224, USA.
| | - Matthias Quick
- Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons, New York, NY 10032, USA; Division of Molecular Therapeutics, New York State Psychiatric Institute, New York, NY 10032, USA.
| | - Qun Liu
- Biology Department, Brookhaven National Laboratory, Upton, NY 11973, USA; NSLS-II, Brookhaven National Laboratory, Upton, NY 11973, USA.
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25
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Chung T. How phosphoinositides shape autophagy in plant cells. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 281:146-158. [PMID: 30824047 DOI: 10.1016/j.plantsci.2019.01.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 01/10/2019] [Accepted: 01/19/2019] [Indexed: 05/06/2023]
Abstract
Plant cells use autophagy to degrade their own cytoplasm in vacuoles, thereby not only recycling their breakdown products, but also ensuring the homeostasis of essential cytoplasmic constituents and organelles. Plants and other eukaryotes have a conserved set of core Autophagy-related (ATG) genes involved in the biogenesis of the autophagosome, the main autophagic compartment destined for the lytic vacuole. In the past decade, the core ATG genes were isolated from several plant species. The core ATG proteins include the components of the VACUOLAR PROTEIN SORTING 34 (VPS34) complex that is responsible for the local production of phosphatidylinositol 3-phosphate (PI3P) at the site of autophagosome formation. Dissecting the roles of PI3P and its effectors in autophagy is challenging, because of the multi-faceted links between autophagosomal and endosomal systems. This review highlights recent studies on putative plant PI3P effectors involved in autophagosome dynamics. Molecular mechanisms underlying the requirement of PI3P for autophagosome biogenesis and trafficking are also discussed.
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Affiliation(s)
- Taijoon Chung
- Department of Biological Sciences, Pusan National University, Busan, 46241, Republic of Korea.
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26
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Lin K, Zhao ZZ, Bo HB, Hao XJ, Wang JQ. Applications of Ruthenium Complex in Tumor Diagnosis and Therapy. Front Pharmacol 2018; 9:1323. [PMID: 30510511 PMCID: PMC6252376 DOI: 10.3389/fphar.2018.01323] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 10/29/2018] [Indexed: 12/27/2022] Open
Abstract
Ruthenium complexes are a new generation of metal antitumor drugs that are currently of great interest in multidisciplinary research. In this review article, we introduce the applications of ruthenium complexes in the diagnosis and therapy of tumors. We focus on the actions of ruthenium complexes on DNA, mitochondria, and endoplasmic reticulum of cells, as well as signaling pathways that induce tumor cell apoptosis, autophagy, and inhibition of angiogenesis. Furthermore, we highlight the use of ruthenium complexes as specific tumor cell probes to dynamically monitor the active biological component of the microenvironment and as excellent photosensitizer, catalyst, and bioimaging agents for phototherapies that significantly enhance the diagnosis and therapeutic effect on tumors. Finally, the combinational use of ruthenium complexes with existing clinical antitumor drugs to synergistically treat tumors is discussed.
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Affiliation(s)
- Ke Lin
- School of Bioscience and Biopharmaceutics, Guangdong Province Key Laboratory for Biotechnology Drug Candidates, Guangdong Pharmaceutical University, Guangzhou, China
| | - Zi-Zhuo Zhao
- Department of Ultrasound, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Hua-Ben Bo
- School of Bioscience and Biopharmaceutics, Guangdong Province Key Laboratory for Biotechnology Drug Candidates, Guangdong Pharmaceutical University, Guangzhou, China
| | - Xiao-Juan Hao
- Manufacturing, Commonwealth Scientific and Industrial Research Organisation, Clayton, VIC, Australia
| | - Jin-Quan Wang
- School of Bioscience and Biopharmaceutics, Guangdong Province Key Laboratory for Biotechnology Drug Candidates, Guangdong Pharmaceutical University, Guangzhou, China
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27
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Oxidative stress-modulating drugs have preferential anticancer effects - involving the regulation of apoptosis, DNA damage, endoplasmic reticulum stress, autophagy, metabolism, and migration. Semin Cancer Biol 2018; 58:109-117. [PMID: 30149066 DOI: 10.1016/j.semcancer.2018.08.010] [Citation(s) in RCA: 141] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 08/19/2018] [Accepted: 08/23/2018] [Indexed: 02/07/2023]
Abstract
To achieve preferential effects against cancer cells but less damage to normal cells is one of the main challenges of cancer research. In this review, we explore the roles and relationships of oxidative stress-mediated apoptosis, DNA damage, ER stress, autophagy, metabolism, and migration of ROS-modulating anticancer drugs. Understanding preferential anticancer effects in more detail will improve chemotherapeutic approaches that are based on ROS-modulating drugs in cancer treatments.
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28
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Lee J, Kee HJ, Min S, Park KC, Park S, Hwang TH, Ryu DH, Hwang GS, Cheong JH. Integrated omics-analysis reveals Wnt-mediated NAD+ metabolic reprogramming in cancer stem-like cells. Oncotarget 2018; 7:48562-48576. [PMID: 27391070 PMCID: PMC5217038 DOI: 10.18632/oncotarget.10432] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 05/22/2016] [Indexed: 12/15/2022] Open
Abstract
Abnormal tumor cell metabolism is a consequence of alterations in signaling pathways that provide critical selective advantage to cancer cells. However, a systematic characterization of the metabolic and signaling pathways altered in cancer stem-like cells (CSCs) is currently lacking. Using nuclear magnetic resonance and mass spectrometry, we profiled the whole-cell metabolites of a pair of parental (P-231) and stem-like cancer cells (S-231), and then integrated with whole transcriptome profiles. We identified elevated NAAD+ in S-231 along with a coordinated increased expression of genes in Wnt/calcium signaling pathway, reflecting the correlation between metabolic reprogramming and altered signaling pathways. The expression of CD38 and ALP, upstream NAAD+ regulatory enzymes, was oppositely regulated between P- and S-231; high CD38 strongly correlated with NAADP in P-231 while high ALP with NAAD+ levels in S-231. Antagonizing Wnt activity by dnTCF4 transfection reversed the levels of NAAD+ and ALP expression in S-231. Of note, elevated NAAD+ caused a decrease of cytosolic Ca2+ levels preventing calcium-induced apoptosis in nutrient-deprived conditions. Reprograming of NAD+ metabolic pathway instigated by Wnt signaling prevented cytosolic Ca2+ overload thereby inhibiting calcium-induced apoptosis in S-231. These results suggest that “oncometabolites” resulting from cross talk between the deranged core cancer signaling pathway and metabolic network provide a selective advantage to CSCs.
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Affiliation(s)
- Jueun Lee
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul 03760, Republic of Korea.,Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Hyun Jung Kee
- Department of Surgery, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Soonki Min
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul 03760, Republic of Korea.,Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Ki Cheong Park
- Department of Surgery, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Sunho Park
- Department of Clinical Sciences, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Tae Hyun Hwang
- Department of Clinical Sciences, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Do Hyun Ryu
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Geum-Sook Hwang
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul 03760, Republic of Korea.,Department of Life Science, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Jae-Ho Cheong
- Department of Surgery, Yonsei University College of Medicine, Seoul 03722, Republic of Korea.,Department of Biochemistry & Molecular Biology, Yonsei University College of Medicine, Seoul 03722, Republic of Korea.,BK21 PLUS Projects for Medical Science, Yonsei University College of Medicine, Seoul 03722, Republic of Korea.,Open NBI Convergence Technology Research Laboratory, Department of Surgery, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
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29
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Carreras-Sureda A, Pihán P, Hetz C. Calcium signaling at the endoplasmic reticulum: fine-tuning stress responses. Cell Calcium 2017; 70:24-31. [PMID: 29054537 DOI: 10.1016/j.ceca.2017.08.004] [Citation(s) in RCA: 181] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 08/11/2017] [Accepted: 08/11/2017] [Indexed: 01/21/2023]
Abstract
Endoplasmic reticulum (ER) calcium signaling is implicated in a myriad of coordinated cellular processes. The ER calcium content is tightly regulated as it allows a favorable environment for protein folding, in addition to operate as a major reservoir for fast and specific release of calcium. Altered ER homeostasis impacts protein folding, activating the unfolded protein response (UPR) as a rescue mechanism to restore proteostasis. ER calcium release impacts mitochondrial metabolism and also fine-tunes the threshold to undergo apoptosis under chronic stress. The global coordination between UPR signaling and energetic demands takes place at mitochondrial associated membranes (MAMs), specialized subdomains mediating interorganelle communication. Here we discuss current models explaining the functional relationship between ER homeostasis and various cellular responses to coordinate proteostasis and metabolic maintenance.
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Affiliation(s)
- Amado Carreras-Sureda
- Center for Geroscience, Brain Health and Metabolism, Faculty of Medicine, University of Chile, Chile; Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
| | - Philippe Pihán
- Center for Geroscience, Brain Health and Metabolism, Faculty of Medicine, University of Chile, Chile; Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
| | - Claudio Hetz
- Center for Geroscience, Brain Health and Metabolism, Faculty of Medicine, University of Chile, Chile; Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile; Buck Institute for Research on Aging, Novato, CA, 94945, USA; Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA 02115, USA.
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30
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Bootman MD, Chehab T, Bultynck G, Parys JB, Rietdorf K. The regulation of autophagy by calcium signals: Do we have a consensus? Cell Calcium 2017; 70:32-46. [PMID: 28847414 DOI: 10.1016/j.ceca.2017.08.005] [Citation(s) in RCA: 173] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 08/14/2017] [Accepted: 08/14/2017] [Indexed: 12/12/2022]
Abstract
Macroautophagy (hereafter called 'autophagy') is a cellular process for degrading and recycling cellular constituents, and for maintenance of cell function. Autophagy initiates via vesicular engulfment of cellular materials and culminates in their degradation via lysosomal hydrolases, with the whole process often being termed 'autophagic flux'. Autophagy is a multi-step pathway requiring the interplay of numerous scaffolding and signalling molecules. In particular, orthologs of the family of ∼30 autophagy-regulating (Atg) proteins that were first characterised in yeast play essential roles in the initiation and processing of autophagic vesicles in mammalian cells. The serine/threonine kinase mTOR (mechanistic target of rapamycin) is a master regulator of the canonical autophagic response of cells to nutrient starvation. In addition, AMP-activated protein kinase (AMPK), which is a key sensor of cellular energy status, can trigger autophagy by inhibiting mTOR, or by phosphorylating other downstream targets. Calcium (Ca2+) has been implicated in autophagic signalling pathways encompassing both mTOR and AMPK, as well as in autophagy seemingly not involving these kinases. Numerous studies have shown that cytosolic Ca2+ signals can trigger autophagy. Moreover, introduction of an exogenous chelator to prevent cytosolic Ca2+ signals inhibits autophagy in response to many different stimuli, with suggestions that buffering Ca2+ affects not only the triggering of autophagy, but also proximal and distal steps during autophagic flux. Observations such as these indicate that Ca2+ plays an essential role as a pro-autophagic signal. However, cellular Ca2+ signals can exert anti-autophagic actions too. For example, Ca2+ channel blockers induce autophagy due to the loss of autophagy-suppressing Ca2+ signals. In addition, the sequestration of Ca2+ by mitochondria during physiological signalling appears necessary to maintain cellular bio-energetics, thereby suppressing AMPK-dependent autophagy. This article attempts to provide an integrated overview of the evidence for the proposed roles of various Ca2+ signals, Ca2+ channels and Ca2+ sources in controlling autophagic flux.
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Affiliation(s)
- Martin D Bootman
- School of Life, Health and Chemical Sciences, The Open University, MK7 6AA, UK.
| | - Tala Chehab
- School of Life, Health and Chemical Sciences, The Open University, MK7 6AA, UK
| | - Geert Bultynck
- KU Leuven, Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine and Leuven Kanker Instituut (LKI), B-3000 Leuven, Belgium
| | - Jan B Parys
- KU Leuven, Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine and Leuven Kanker Instituut (LKI), B-3000 Leuven, Belgium
| | - Katja Rietdorf
- School of Life, Health and Chemical Sciences, The Open University, MK7 6AA, UK
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31
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Pihán P, Carreras-Sureda A, Hetz C. BCL-2 family: integrating stress responses at the ER to control cell demise. Cell Death Differ 2017. [PMID: 28622296 DOI: 10.1038/cdd.2017.82] [Citation(s) in RCA: 174] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
In the last decade, the endoplasmic reticulum (ER) has emerged as a central organelle regulating the core mitochondrial apoptosis pathway. At the ER membrane, a variety of stress signals are integrated toward determining cell fate, involving a complex cross talk between key homeostatic pathways including the unfolded protein response, autophagy, calcium signaling and mitochondrial bioenergetics. In this context, key regulators of cell death of the BCL-2 and TMBIM/BI-1 family of proteins have relevant functions as stress rheostats mediated by the formation of distinct protein complexes that regulate the switch between adaptive and proapoptotic phases under stress. Here, we overview recent advances on our molecular understanding of how the apoptotic machinery integrates stress signals toward cell fate decisions upstream of the mitochondrial gateway of death.
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Affiliation(s)
- Philippe Pihán
- Faculty of Medicine, Biomedical Neuroscience Institute, University of Chile, Santiago, Chile.,Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile.,Faculty of Medicine, Center for Geroscience, Brain Health and Metabolism, University of Chile, Santiago, Chile
| | - Amado Carreras-Sureda
- Faculty of Medicine, Biomedical Neuroscience Institute, University of Chile, Santiago, Chile.,Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile.,Faculty of Medicine, Center for Geroscience, Brain Health and Metabolism, University of Chile, Santiago, Chile
| | - Claudio Hetz
- Faculty of Medicine, Biomedical Neuroscience Institute, University of Chile, Santiago, Chile.,Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile.,Faculty of Medicine, Center for Geroscience, Brain Health and Metabolism, University of Chile, Santiago, Chile.,Buck Institute for Research on Aging, Novato, CA 94945, USA.,Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston MA 02115, USA
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32
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Cesselli D, Aleksova A, Sponga S, Cervellin C, Di Loreto C, Tell G, Beltrami AP. Cardiac Cell Senescence and Redox Signaling. Front Cardiovasc Med 2017; 4:38. [PMID: 28612009 PMCID: PMC5447053 DOI: 10.3389/fcvm.2017.00038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 05/10/2017] [Indexed: 12/12/2022] Open
Abstract
Aging is characterized by a progressive loss of the ability of the organism to cope with stressors and to repair tissue damage. As a result, chronic diseases, including cardiovascular disease, increase their prevalence with aging, underlining the existence of common mechanisms that lead to frailty and age-related diseases. In this frame, the progressive decline of the homeostatic and reparative function of primitive cells has been hypothesized to play a major role in the evolution of cardiac pathology to heart failure. Although initially it was believed that reactive oxygen species (ROS) were produced in an unregulated manner as a byproduct of cellular metabolism, causing macromolecular damage and aging, accumulating evidence indicate the major role played by redox signaling in physiology. Aim of this review is to critically revise evidence linking ROS to cell senescence and aging and to provide evidence of the primary role played by redox signaling, with a particular emphasis on the multifunctional protein APE1/Ref in stem cell biology. Finally, we will discuss evidence supporting the role of redox signaling in cardiovascular cells.
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Affiliation(s)
| | - Aneta Aleksova
- Cardiovascular Department, Azienda Sanitaria Universitaria Integrata di Trieste, University of Trieste, Trieste, Italy
| | - Sandro Sponga
- Cardiothoracic Surgery, Azienda Sanitaria Universitaria Integrata di Udine, Udine, Italy
| | | | | | - Gianluca Tell
- Department of Medicine, University of Udine, Udine, Italy
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33
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Xu G, Wang S, Han S, Xie K, Wang Y, Li J, Liu Y. Plant Bax Inhibitor-1 interacts with ATG6 to regulate autophagy and programmed cell death. Autophagy 2017; 13:1161-1175. [PMID: 28537463 PMCID: PMC5529081 DOI: 10.1080/15548627.2017.1320633] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Autophagy is an evolutionarily conserved catabolic process and is involved in the regulation of programmed cell death during the plant immune response. However, mechanisms regulating autophagy and cell death are incompletely understood. Here, we demonstrate that plant Bax inhibitor-1 (BI-1), a highly conserved cell death regulator, interacts with ATG6, a core autophagy-related protein. Silencing of BI-1 reduced the autophagic activity induced by both N gene-mediated resistance to Tobacco mosaic virus (TMV) and methyl viologen (MV), and enhanced N gene-mediated cell death. In contrast, overexpression of plant BI-1 increased autophagic activity and surprisingly caused autophagy-dependent cell death. These results suggest that plant BI-1 has both prosurvival and prodeath effects in different physiological contexts and both depend on autophagic activity.
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Affiliation(s)
- Guoyong Xu
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China,Department of Biology, Duke University, Durham, NC, USA
| | - Shanshan Wang
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - Shaojie Han
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China,Department of Plant Pathology, University of Wisconsin-Madison, Madison, WI, USA
| | - Ke Xie
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China,School of Chemistry and Biological Engineering, University of Science and Technology, Beijing, China
| | - Yan Wang
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - Jinlin Li
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - Yule Liu
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China,CONTACT Yule Liu School of Life Sciences, Tsinghua University, Beijing 100084, China
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34
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Ivanova H, Kerkhofs M, La Rovere RM, Bultynck G. Endoplasmic Reticulum-Mitochondrial Ca 2+ Fluxes Underlying Cancer Cell Survival. Front Oncol 2017; 7:70. [PMID: 28516062 PMCID: PMC5413502 DOI: 10.3389/fonc.2017.00070] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 03/28/2017] [Indexed: 11/17/2022] Open
Abstract
Calcium ions (Ca2+) are crucial, ubiquitous, intracellular second messengers required for functional mitochondrial metabolism during uncontrolled proliferation of cancer cells. The mitochondria and the endoplasmic reticulum (ER) are connected via “mitochondria-associated ER membranes” (MAMs) where ER–mitochondria Ca2+ transfer occurs, impacting the mitochondrial biology related to several aspects of cellular survival, autophagy, metabolism, cell death sensitivity, and metastasis, all cancer hallmarks. Cancer cells appear addicted to these constitutive ER–mitochondrial Ca2+ fluxes for their survival, since they drive the tricarboxylic acid cycle and the production of mitochondrial substrates needed for nucleoside synthesis and proper cell cycle progression. In addition to this, the mitochondrial Ca2+ uniporter and mitochondrial Ca2+ have been linked to hypoxia-inducible factor 1α signaling, enabling metastasis and invasion processes, but they can also contribute to cellular senescence induced by oncogenes and replication. Finally, proper ER–mitochondrial Ca2+ transfer seems to be a key event in the cell death response of cancer cells exposed to chemotherapeutics. In this review, we discuss the emerging role of ER–mitochondrial Ca2+ fluxes underlying these cancer-related features.
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Affiliation(s)
- Hristina Ivanova
- Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine, Leuven Kanker Instituut (LKI), KU Leuven, Leuven, Belgium
| | - Martijn Kerkhofs
- Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine, Leuven Kanker Instituut (LKI), KU Leuven, Leuven, Belgium
| | - Rita M La Rovere
- Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine, Leuven Kanker Instituut (LKI), KU Leuven, Leuven, Belgium
| | - Geert Bultynck
- Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine, Leuven Kanker Instituut (LKI), KU Leuven, Leuven, Belgium
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35
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Wang P, Wang ZY. Metal ions influx is a double edged sword for the pathogenesis of Alzheimer's disease. Ageing Res Rev 2017; 35:265-290. [PMID: 27829171 DOI: 10.1016/j.arr.2016.10.003] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Revised: 09/08/2016] [Accepted: 10/17/2016] [Indexed: 12/17/2022]
Abstract
Alzheimer's disease (AD) is a common form of dementia in aged people, which is defined by two pathological characteristics: β-amyloid protein (Aβ) deposition and tau hyperphosphorylation. Although the mechanisms of AD development are still being debated, a series of evidence supports the idea that metals, such as copper, iron, zinc, magnesium and aluminium, are involved in the pathogenesis of the disease. In particular, the processes of Aβ deposition in senile plaques (SP) and the inclusion of phosphorylated tau in neurofibrillary tangles (NFTs) are markedly influenced by alterations in the homeostasis of the aforementioned metal ions. Moreover, the mechanisms of oxidative stress, synaptic plasticity, neurotoxicity, autophagy and apoptosis mediate the effects of metal ions-induced the aggregation state of Aβ and phosphorylated tau on AD development. More importantly, imbalance of these mechanisms finally caused cognitive decline in different experiment models. Collectively, reconstructing the signaling network that regulates AD progression by metal ions may provide novel insights for developing chelators specific for metal ions to combat AD.
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Affiliation(s)
- Pu Wang
- College of Life and Health Sciences, Northeastern University, No. 3-11, Wenhua Road, Shenyang, 110819, PR China.
| | - Zhan-You Wang
- College of Life and Health Sciences, Northeastern University, No. 3-11, Wenhua Road, Shenyang, 110819, PR China.
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36
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Carreras-Sureda A, Pihán P, Hetz C. The Unfolded Protein Response: At the Intersection between Endoplasmic Reticulum Function and Mitochondrial Bioenergetics. Front Oncol 2017; 7:55. [PMID: 28421160 PMCID: PMC5377016 DOI: 10.3389/fonc.2017.00055] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 03/13/2017] [Indexed: 02/04/2023] Open
Abstract
Endoplasmic reticulum (ER) to mitochondria communication has emerged in recent years as a signaling hub regulating cellular physiology with a relevant contribution to diseases including cancer and neurodegeneration. This functional integration is exerted through discrete interorganelle structures known as mitochondria-associated membranes (MAMs). At these domains, ER/mitochondria physically associate to dynamically adjust metabolic demands and the response to stress stimuli. Here, we provide a focused overview of how the ER shapes the function of the mitochondria, giving a special emphasis to the significance of local signaling of the unfolded protein response at MAMs. The implications to cell fate control and the progression of cancer are also discussed.
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Affiliation(s)
- Amado Carreras-Sureda
- Center for Geroscience, Brain Health and Metabolism, Faculty of Medicine, University of Chile, Santiago, Chile.,Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile.,Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
| | - Philippe Pihán
- Center for Geroscience, Brain Health and Metabolism, Faculty of Medicine, University of Chile, Santiago, Chile.,Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile.,Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
| | - Claudio Hetz
- Center for Geroscience, Brain Health and Metabolism, Faculty of Medicine, University of Chile, Santiago, Chile.,Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile.,Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile.,Buck Institute for Research on Aging, Novato, CA, USA.,Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA, USA
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37
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Liu Q. TMBIM-mediated Ca 2+ homeostasis and cell death. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2017; 1864:850-857. [PMID: 28064000 DOI: 10.1016/j.bbamcr.2016.12.023] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Revised: 12/22/2016] [Accepted: 12/22/2016] [Indexed: 11/25/2022]
Abstract
Ca2+ is a ubiquitous intracellular messenger that regulates numerous physiological activities in humans, animals, plants, and bacteria. Cytosolic Ca2+ is kept at a low level, but subcellular organelles such as the endoplasmic reticulum (ER) and Golgi apparatus maintain high-concentration Ca2+ stores. Under resting conditions, store Ca2+ homeostasis is dynamically regulated to equilibrate between active Ca2+ uptake and passive Ca2+ leak processes. The evolutionarily conserved Transmembrane BAX Inhibitor-1 Motif-containing (TMBIM) proteins mediate Ca2+ homeostasis and cell death. This review focuses on recent advances in functional and structural analysis of TMBIM proteins in regulation of the two related functions. The roles of TMBIM proteins in pathogen infection and cancer are also discussed with prospects for treatment. This article is part of a Special Issue entitled: ECS Meeting edited by Claus Heizmann, Joachim Krebs and Jacques Haiech.
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Affiliation(s)
- Qun Liu
- Biology Department, Brookhaven National Laboratory, Upton, NY 11973, USA.
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38
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Over Six Decades of Discovery and Characterization of the Architecture at Mitochondria-Associated Membranes (MAMs). ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 997:13-31. [PMID: 28815519 DOI: 10.1007/978-981-10-4567-7_2] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The discovery of proteins regulating ER-mitochondria tethering including phosphofurin acidic cluster sorting protein 2 (PACS-2) and mitofusin-2 has pushed contact sites between the endoplasmic reticulum (ER) and mitochondria into the spotlight of cell biology. While the field is developing rapidly and controversies have come and gone multiple times during its history, it is sometimes overlooked that significant research has been done decades ago with the original discovery of these structures in the 1950s and the first characterization of their function (and coining of the term mitochondria-associated membrane, MAM) in 1990. Today, an ever-increasing array of proteins localize to the MAM fraction of the endoplasmic reticulum (ER) to regulate the interaction of this organelle with mitochondria. These mitochondria-ER contacts, sometimes referred to as MERCs, regulate a multitude of biological functions, including lipid metabolism, Ca2+ signaling, bioenergetics, inflammation, autophagy, mitochondrial structure, and apoptosis.
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39
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Sun F, Xu X, Wang X, Zhang B. Regulation of autophagy by Ca 2. Tumour Biol 2016; 37:10.1007/s13277-016-5353-y. [PMID: 27864685 PMCID: PMC5250648 DOI: 10.1007/s13277-016-5353-y] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 09/07/2016] [Indexed: 01/20/2023] Open
Abstract
Autophagy is an evolutionarily conserved lysosomal catabolic process used as an internal engine in response to nutrient starvation or metabolic stress. A number of protein complexes and an intricate network of stress signaling cascades impinge on the regulation of autophagy; the mammalian target of rapamycin serves as a canonical player. Ca2+, as a major intracellular second messenger, regulates multiple physiological and pathological functions. Although significant information is already well-established about the role of Ca2+ in apoptosis, its role in autophagy has been recently determined and is poorly understood. Intracellular Ca2+ positively and negatively affects autophagy. In this review, evidence for both views and the interplay of Ca2+ between autophagy and apoptosis induction are discussed. The available data revealed the bidirectional role of Ca2+ in the regulation of autophagy. Moreover, the data also indicated that this role probably depends on the context of time, space, Ca2+ source, and cell state, thus either preventing or enhancing autophagy.
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Affiliation(s)
- Fang Sun
- Department of Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, 221000, China
- Department of Obstetrics and Gynecology, Xuzhou Central Hospital, Xuzhou, Jiangsu, 221009, China
| | - Xia Xu
- Department of Obstetrics and Gynecology, Xuzhou Hospital of Traditional Chinese Medicine, Xuzhou, Jiangsu, 221002, China
| | - Xiaohong Wang
- Department of Obstetrics and Gynecology, Xuzhou Hospital of Traditional Chinese Medicine, Xuzhou, Jiangsu, 221002, China
| | - Bei Zhang
- Department of Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, 221000, China.
- Department of Obstetrics and Gynecology, Xuzhou Central Hospital, Xuzhou, Jiangsu, 221009, China.
- Department of Obstetrics and Gynecology, Xuzhou Central Hospital, Xuzhou, Jiangsu, 221002, China.
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40
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Decuypere JP, Parys JB, Bultynck G. ITPRs/inositol 1,4,5-trisphosphate receptors in autophagy: From enemy to ally. Autophagy 2016; 11:1944-8. [PMID: 26291777 PMCID: PMC4824608 DOI: 10.1080/15548627.2015.1083666] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
ITPRs (inositol 1,4,5-trisphosphate receptors), the main endoplasmic reticulum (ER) Ca2+-release channels, were originally proposed as suppressors of autophagy. Yet, new evidence has accumulated over recent years supporting a crucial, stimulatory role for ITPRs in driving the autophagic flux. Here, we provide an integrated view on how ITPR-mediated Ca2+ signaling can have a dual impact on autophagy, depending on the characteristics of the spatio-temporal Ca2+ signals, including the existence of ER-mitochondrial and ER-lysosomal Ca2+ signaling microdomains.
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Affiliation(s)
- Jean-Paul Decuypere
- a KU Leuven Department of Microbiology and Immunology, Laboratory of Abdominal Transplantation; University Hospitals Leuven Department of Abdominal Transplant Surgery ; Leuven , Belgium
| | - Jan B Parys
- b KU Leuven Department of Cellular and Molecular Medicine, Laboratory of Molecular and Cellular Signaling ; Leuven , Belgium
| | - Geert Bultynck
- b KU Leuven Department of Cellular and Molecular Medicine, Laboratory of Molecular and Cellular Signaling ; Leuven , Belgium
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41
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Yadav RK, Lee GH, Lee HY, Li B, Jung HE, Rashid HO, Choi MK, Yadav BK, Kim WH, Kim KW, Park BH, Kim W, Lee YC, Kim HR, Chae HJ. TMBIM6 (transmembrane BAX inhibitor motif containing 6) enhances autophagy and reduces renal dysfunction in a cyclosporine A-induced nephrotoxicity model. Autophagy 2016; 11:1760-74. [PMID: 26305401 DOI: 10.1080/15548627.2015.1082021] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Cyclosporine A (CsA) is widely used as an immunosuppressor in transplantation. Previous studies reported that CsA induces autophagy and that chronic treatment with CsA results in accumulation of autophagosomes and reduced autophagic clearance. Autophagy is a prosurvival process that promotes recovery from acute kidney injury by degrading misfolded proteins produced in the kidney. In the present study, we used TMBIM6-expressing HK-2, human kidney tubular cells (TMBIM6 cells) and Tmbim6 knockout (tmbim6(-/-)) mice. When exposed to CsA, the TMBIM6 cells maintained autophagy activity by preventing autophagosome accumulation. With regard to signaling, PRKKA/AMPK phosphorylation and mechanistic target of rapamycin (serine/threonine kinase) complex 1 (MTORC1) expression and its downstream target TFEB (transcription factor EB), a lysosome biogenesis factor, were regulated in the TMBIM6 cells. Lysosomal activity was highly increased or stably maintained in the presence of TMBIM6. In addition, treatment of tmbim6(-/-) mice with CsA resulted in increased autophagosome formation and decreased lysosome formation and activity. We also found that tmbim6(-/-) mice were susceptible to CsA-induced kidney injury. Taken together, these results indicate that TMBIM6 protects against CsA-induced nephrotoxicity both in vitro and in vivo by inducing autophagy and activating lysosomes.
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Affiliation(s)
- Raj Kumar Yadav
- a Department of Pharmacology and Institute of New Drug Development, Chonbuk National University Medical School ; Jeonju , Chonbuk , Korea
| | - Geum-Hwa Lee
- a Department of Pharmacology and Institute of New Drug Development, Chonbuk National University Medical School ; Jeonju , Chonbuk , Korea
| | - Hwa-Young Lee
- a Department of Pharmacology and Institute of New Drug Development, Chonbuk National University Medical School ; Jeonju , Chonbuk , Korea
| | - Bo Li
- a Department of Pharmacology and Institute of New Drug Development, Chonbuk National University Medical School ; Jeonju , Chonbuk , Korea
| | - Han-Eul Jung
- a Department of Pharmacology and Institute of New Drug Development, Chonbuk National University Medical School ; Jeonju , Chonbuk , Korea
| | - Harun-Or Rashid
- a Department of Pharmacology and Institute of New Drug Development, Chonbuk National University Medical School ; Jeonju , Chonbuk , Korea
| | - Min Kyung Choi
- a Department of Pharmacology and Institute of New Drug Development, Chonbuk National University Medical School ; Jeonju , Chonbuk , Korea
| | - Binod Kumar Yadav
- b Department of Biochemistry, Maharajgunj Medical Campus; Institute of Medicine; Tribhuvan University ; Kathmandu , Nepal
| | - Woo-Ho Kim
- c Department of Pathology, Seoul National University Medical School ; Seoul , Korea
| | - Kyung-Woon Kim
- d Animal Biotechnology Division; National Institute of Animal Science ; RDA, Wanju-gun; Chonbuk , Korea
| | - Byung-Hyun Park
- e Department of Biochemistry, Chonbuk National University Medical School ; Jeonju , Chonbuk , Korea
| | - Won Kim
- f Department of Internal Medicine, Chonbuk National University Medical School ; Jeonju , Jeonbuk , Korea
| | - Yong-Chul Lee
- f Department of Internal Medicine, Chonbuk National University Medical School ; Jeonju , Jeonbuk , Korea
| | - Hyung-Ryong Kim
- g Department of Dental Pharmacology and Wonkwang Biomaterial Implant Research Institute, School of Dentistry, Wonkwang University ; Iksan , Chonbuk , Korea
| | - Han-Jung Chae
- a Department of Pharmacology and Institute of New Drug Development, Chonbuk National University Medical School ; Jeonju , Chonbuk , Korea
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42
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Lee GH, Oh KJ, Kim HR, Han HS, Lee HY, Park KG, Nam KH, Koo SH, Chae HJ. Effect of BI-1 on insulin resistance through regulation of CYP2E1. Sci Rep 2016; 6:32229. [PMID: 27576594 PMCID: PMC5006057 DOI: 10.1038/srep32229] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 08/04/2016] [Indexed: 12/21/2022] Open
Abstract
Diet-induced obesity is a major contributing factor to the progression of hepatic insulin resistance. Increased free fatty acids in liver enhances endoplasmic reticulum (ER) stress and production of reactive oxygen species (ROS), both are directly responsible for dysregulation of hepatic insulin signaling. BI-1, a recently studied ER stress regulator, was examined to investigate its association with ER stress and ROS in insulin resistance models. To induce obesity and insulin resistance, BI-1 wild type and BI-1 knock-out mice were fed a high-fat diet for 8 weeks. The BI-1 knock-out mice had hyperglycemia, was associated with impaired glucose and insulin tolerance under high-fat diet conditions. Increased activity of NADPH-dependent CYP reductase-associated cytochrome p450 2E1 (CYP2E1) and exacerbation of ER stress in the livers of BI-1 knock-out mice was also observed. Conversely, stable expression of BI-1 in HepG2 hepatocytes was shown to reduce palmitate-induced ER stress and CYP2E1-dependent ROS production, resulting in the preservation of intact insulin signaling. Stable expression of CYP2E1 led to increased ROS production and dysregulation of insulin signaling in hepatic cells, mimicking palmitate-mediated hepatic insulin resistance. We propose that BI-1 protects against obesity-induced hepatic insulin resistance by regulating CYP2E1 activity and ROS production.
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Affiliation(s)
- Geum-Hwa Lee
- Department of Pharmacology and New Drug Development Institute, Medical School, Chonbuk National University, Jeonju, 561-181, Republic of Korea
| | - Kyoung-Jin Oh
- Division of Life Sciences, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 136-713, Republic of Korea.,Metabolic Regulation Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 305-806, Republic of Korea
| | - Hyung-Ryong Kim
- Department of Dental Pharmacology and Wonkwang Dental Research Institute, School of Dentistry, Wonkwang University, Iksan, 570-749, Republic of Korea
| | - Hye-Sook Han
- Division of Life Sciences, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 136-713, Republic of Korea
| | - Hwa-Young Lee
- Department of Pharmacology and New Drug Development Institute, Medical School, Chonbuk National University, Jeonju, 561-181, Republic of Korea
| | - Keun-Gyu Park
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, 700-721, Republic of Korea
| | - Ki-Hoan Nam
- Laboratory Animal Resource Center, KRIBB, Ochang-eup, 363-883, Republic of Korea
| | - Seung-Hoi Koo
- Division of Life Sciences, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 136-713, Republic of Korea
| | - Han-Jung Chae
- Department of Pharmacology and New Drug Development Institute, Medical School, Chonbuk National University, Jeonju, 561-181, Republic of Korea
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43
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Planells-Ferrer L, Urresti J, Coccia E, Galenkamp KMO, Calleja-Yagüe I, López-Soriano J, Carriba P, Barneda-Zahonero B, Segura MF, Comella JX. Fas apoptosis inhibitory molecules: more than death-receptor antagonists in the nervous system. J Neurochem 2016; 139:11-21. [DOI: 10.1111/jnc.13729] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 06/14/2016] [Accepted: 07/02/2016] [Indexed: 12/12/2022]
Affiliation(s)
- Laura Planells-Ferrer
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Jorge Urresti
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Elena Coccia
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Koen M. O. Galenkamp
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Isabel Calleja-Yagüe
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Joaquín López-Soriano
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Paulina Carriba
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Bruna Barneda-Zahonero
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Miguel F. Segura
- Group of Translational Research in Childhood and Adolescent Cancer; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
| | - Joan X. Comella
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
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44
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Filippi-Chiela EC, Viegas MS, Thomé MP, Buffon A, Wink MR, Lenz G. Modulation of Autophagy by Calcium Signalosome in Human Disease. Mol Pharmacol 2016; 90:371-84. [DOI: 10.1124/mol.116.105171] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 07/18/2016] [Indexed: 12/30/2022] Open
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45
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Rashid HO, Yadav RK, Kim HR, Chae HJ. ER stress: Autophagy induction, inhibition and selection. Autophagy 2015; 11:1956-1977. [PMID: 26389781 DOI: 10.1080/15548627.2015.1091141] [Citation(s) in RCA: 561] [Impact Index Per Article: 62.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
An accumulation of unfolded or misfolded proteins in the endoplasmic reticulum (ER) leads to stress conditions. To mitigate such circumstances, stressed cells activate a homeostatic intracellular signaling network cumulatively called the unfolded protein response (UPR), which orchestrates the recuperation of ER function. Macroautophagy (hereafter autophagy), an intracellular lysosome-mediated bulk degradation pathway for recycling and eliminating wornout proteins, protein aggregates, and damaged organelles, has also emerged as an essential protective mechanism during ER stress. These 2 systems are dynamically interconnected, and recent investigations have revealed that ER stress can either stimulate or inhibit autophagy. However, the stress-associated molecular cues that control the changeover switch between induction and inhibition of autophagy are largely obscure. This review summarizes the crosstalk between ER stress and autophagy and their signaling networks mainly in mammalian-based systems. Additionally, we highlight current knowledge on selective autophagy and its connection to ER stress.
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Affiliation(s)
- Harun-Or Rashid
- a Department of Pharmacology ; Medical School; Chonbuk National University
| | - Raj Kumar Yadav
- a Department of Pharmacology ; Medical School; Chonbuk National University
| | - Hyung-Ryong Kim
- b Department of Dental Pharmacology ; College of Dentistry; Wonkwang University
| | - Han-Jung Chae
- a Department of Pharmacology ; Medical School; Chonbuk National University
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46
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Lisak D, Schacht T, Gawlitza A, Albrecht P, Aktas O, Koop B, Gliem M, Hofstetter HH, Zanger K, Bultynck G, Parys JB, De Smedt H, Kindler T, Adams-Quack P, Hahn M, Waisman A, Reed JC, Hövelmeyer N, Methner A. BAX inhibitor-1 is a Ca(2+) channel critically important for immune cell function and survival. Cell Death Differ 2015; 23:358-68. [PMID: 26470731 DOI: 10.1038/cdd.2015.115] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 07/20/2015] [Accepted: 07/21/2015] [Indexed: 01/03/2023] Open
Abstract
The endoplasmic reticulum (ER) serves as the major intracellular Ca(2+) store and has a role in the synthesis and folding of proteins. BAX (BCL2-associated X protein) inhibitor-1 (BI-1) is a Ca(2+) leak channel also implicated in the response against protein misfolding, thereby connecting the Ca(2+) store and protein-folding functions of the ER. We found that BI-1-deficient mice suffer from leukopenia and erythrocytosis, have an increased number of splenic marginal zone B cells and higher abundance and nuclear translocation of NF-κB (nuclear factor-κ light-chain enhancer of activated B cells) proteins, correlating with increased cytosolic and ER Ca(2+) levels. When put into culture, purified knockout T cells and even more so B cells die spontaneously. This is preceded by increased activity of the mitochondrial initiator caspase-9 and correlated with a significant surge in mitochondrial Ca(2+) levels, suggesting an exhausted mitochondrial Ca(2+) buffer capacity as the underlying cause for cell death in vitro. In vivo, T-cell-dependent experimental autoimmune encephalomyelitis and B-cell-dependent antibody production are attenuated, corroborating the ex vivo results. These results suggest that BI-1 has a major role in the functioning of the adaptive immune system by regulating intracellular Ca(2+) homeostasis in lymphocytes.
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Affiliation(s)
- D Lisak
- Focus Program Translational Neuroscience (FTN), Rhine Main Neuroscience Network (rmn) and Department of Neurology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - T Schacht
- Focus Program Translational Neuroscience (FTN), Rhine Main Neuroscience Network (rmn) and Department of Neurology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - A Gawlitza
- Focus Program Translational Neuroscience (FTN), Rhine Main Neuroscience Network (rmn) and Department of Neurology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - P Albrecht
- Heinrich Heine Universität Düsseldorf, Department of Neurology, Düsseldorf, Germany
| | - O Aktas
- Heinrich Heine Universität Düsseldorf, Department of Neurology, Düsseldorf, Germany
| | - B Koop
- Heinrich Heine Universität Düsseldorf, Department of Neurology, Düsseldorf, Germany
| | - M Gliem
- Heinrich Heine Universität Düsseldorf, Department of Neurology, Düsseldorf, Germany
| | - H H Hofstetter
- Heinrich Heine Universität Düsseldorf, Department of Neurology, Düsseldorf, Germany
| | - K Zanger
- Center for Anatomy and Brain Research, Düsseldorf, Germany
| | - G Bultynck
- Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine, KU Leuven, Belgium
| | - J B Parys
- Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine, KU Leuven, Belgium
| | - H De Smedt
- Laboratory of Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine, KU Leuven, Belgium
| | - T Kindler
- III Medical Clinic, University Medical Center of the Johannes Gutenberg-University of Mainz, Mainz, Germany
| | - P Adams-Quack
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg-University of Mainz, Mainz, Germany
| | - M Hahn
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg-University of Mainz, Mainz, Germany
| | - A Waisman
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg-University of Mainz, Mainz, Germany
| | - J C Reed
- Sanford Burnham Institute, La Jolla, CA, USA
| | - N Hövelmeyer
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg-University of Mainz, Mainz, Germany
| | - A Methner
- Focus Program Translational Neuroscience (FTN), Rhine Main Neuroscience Network (rmn) and Department of Neurology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
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47
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Krytska K, Ryles HT, Sano R, Raman P, Infarinato NR, Hansel TD, Makena MR, Song MM, Reynolds CP, Mossé YP. Crizotinib Synergizes with Chemotherapy in Preclinical Models of Neuroblastoma. Clin Cancer Res 2015; 22:948-60. [PMID: 26438783 DOI: 10.1158/1078-0432.ccr-15-0379] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 09/21/2015] [Indexed: 01/20/2023]
Abstract
PURPOSE The presence of an ALK aberration correlates with inferior survival for patients with high-risk neuroblastoma. The emergence of ALK inhibitors such as crizotinib has provided novel treatment opportunities. However, certain ALK mutations result in de novo crizotinib resistance, and a phase I trial of crizotinib showed a lack of response in patients harboring those ALK mutations. Thus, understanding mechanisms of resistance and defining circumvention strategies for the clinic is critical. EXPERIMENTAL DESIGN The sensitivity of human neuroblastoma-derived cell lines, cell line-derived, and patient-derived xenograft (PDX) models with varying ALK statuses to crizotinib combined with topotecan and cyclophosphamide (topo/cyclo) was examined. Cultured cells and xenografts were evaluated for effects of these drugs on proliferation, signaling, and cell death, and assessment of synergy. RESULTS In neuroblastoma murine xenografts harboring the most common ALK mutations, including those mutations associated with resistance to crizotinib (but not in those with wild-type ALK), crizotinib combined with topo/cyclo enhanced tumor responses and mouse event-free survival. Crizotinib + topo/cyclo showed synergistic cytotoxicity and higher caspase-dependent apoptosis than crizotinib or topo/cyclo alone in neuroblastoma cell lines with ALK aberrations (mutation or amplification). CONCLUSIONS Combining crizotinib with chemotherapeutic agents commonly used in treating newly diagnosed patients with high-risk neuroblastoma restores sensitivity in preclinical models harboring both sensitive ALK aberrations and de novo-resistant ALK mutations. These data support clinical testing of crizotinib and conventional chemotherapy with the goal of integrating ALK inhibition into multiagent therapy for ALK-aberrant neuroblastoma patients.
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Affiliation(s)
- Kateryna Krytska
- Division of Oncology and Center for Childhood Cancer Research, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Hannah T Ryles
- Division of Oncology and Center for Childhood Cancer Research, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Renata Sano
- Division of Oncology and Center for Childhood Cancer Research, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Pichai Raman
- Division of Oncology, The Center for Biomedical Informatics (CBMi), The Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania
| | - Nicole R Infarinato
- Division of Oncology and Center for Childhood Cancer Research, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Theodore D Hansel
- Division of Oncology and Center for Childhood Cancer Research, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Monish R Makena
- Cancer Center, Texas Tech University Health Sciences Center School of Medicine, Lubbock, Texas
| | - Michael M Song
- Cancer Center, Texas Tech University Health Sciences Center School of Medicine, Lubbock, Texas
| | - C Patrick Reynolds
- Cancer Center, Texas Tech University Health Sciences Center School of Medicine, Lubbock, Texas
| | - Yael P Mossé
- Division of Oncology and Center for Childhood Cancer Research, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
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48
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Yu KN, Chang SH, Park SJ, Lim J, Lee J, Yoon TJ, Kim JS, Cho MH. Titanium Dioxide Nanoparticles Induce Endoplasmic Reticulum Stress-Mediated Autophagic Cell Death via Mitochondria-Associated Endoplasmic Reticulum Membrane Disruption in Normal Lung Cells. PLoS One 2015; 10:e0131208. [PMID: 26121477 PMCID: PMC4485469 DOI: 10.1371/journal.pone.0131208] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Accepted: 05/30/2015] [Indexed: 01/08/2023] Open
Abstract
Nanomaterials are used in diverse fields including food, cosmetic, and medical industries. Titanium dioxide nanoparticles (TiO2-NP) are widely used, but their effects on biological systems and mechanism of toxicity have not been elucidated fully. Here, we report the toxicological mechanism of TiO2-NP in cell organelles. Human bronchial epithelial cells (16HBE14o-) were exposed to 50 and 100 μg/mL TiO2-NP for 24 and 48 h. Our results showed that TiO2-NP induced endoplasmic reticulum (ER) stress in the cells and disrupted the mitochondria-associated endoplasmic reticulum membranes (MAMs) and calcium ion balance, thereby increasing autophagy. In contrast, an inhibitor of ER stress, tauroursodeoxycholic acid (TUDCA), mitigated the cellular toxic response, suggesting that TiO2-NP promoted toxicity via ER stress. This novel mechanism of TiO2-NP toxicity in human bronchial epithelial cells suggests that further exhaustive research on the harmful effects of these nanoparticles in relevant organisms is needed for their safe application.
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Affiliation(s)
- Kyeong-Nam Yu
- Laboratory of Toxicology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science and College of Veterinary Medicine, Seoul National University, Gwanak-gu, Seoul, Korea
| | - Seung-Hee Chang
- Laboratory of Toxicology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science and College of Veterinary Medicine, Seoul National University, Gwanak-gu, Seoul, Korea
| | - Soo Jin Park
- R&D Center, Biterials Co., Siksa-dong, Ilsandong-gu, Goyang-si, Gyeonggi-do, Korea, Korea
| | - Joohyun Lim
- Department of Chemistry, College of Natural Sciences, Gwanak-gu, Seoul National University, Seoul, Korea
| | - Jinkyu Lee
- Department of Chemistry, College of Natural Sciences, Gwanak-gu, Seoul National University, Seoul, Korea
| | - Tae-Jong Yoon
- Department of Applied Bioscience, College of Life Science, CHA University, Pocheon-shi, Gyeonggi-do, Korea
| | - Jun-Sung Kim
- R&D Center, Biterials Co., Siksa-dong, Ilsandong-gu, Goyang-si, Gyeonggi-do, Korea, Korea
- * E-mail: (JSK); (MHC)
| | - Myung-Haing Cho
- Laboratory of Toxicology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science and College of Veterinary Medicine, Seoul National University, Gwanak-gu, Seoul, Korea
- Graduate Group of Tumor Biology, Seoul National University, Gwanak-gu, Seoul, Korea
- Graduate School of Convergence Science and Technology, Seoul National University, Yeongtong-Gu, Suwon, Gyeonggi-Do, Korea
- Advanced Institute of Convergence Technology, Seoul National University, Suwon, Gyeonggi-Do, Korea
- * E-mail: (JSK); (MHC)
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49
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Lee GH, Kim HR, Chae HJ. BI-1 enhances Fas-induced cell death through a Na+/H+-associated mechanism. BMB Rep 2015; 47:393-8. [PMID: 24314142 PMCID: PMC4163852 DOI: 10.5483/bmbrep.2014.47.7.194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Indexed: 11/20/2022] Open
Abstract
The role of Bax inhibitor-1 (BI-1) in the protective mechanism against apoptotic stimuli has been studied; however, as little is known about its role in death receptor-mediated cell death, this study was designed to investigate the effect of BI-1 on Fas-induced cell death, and the underlying mechanisms. HT1080 adenocarcinoma cells were cultured in high concentration of glucose media and transfected with vector alone (Neo cells) or BI-1-vector (BI-1 cells), and treated with Fas. In cell viability, apoptosis, and caspase-3 analyses, the BI-1 cells showed enhanced sensitivity to Fas. Fas significantly decreased cytosolic pH in BI-1 cells, compared with Neo cells, and this decrease correlated with BI-1 oligomerization, mitochondrial Ca2+ accumulation, and significant inhibition of sodium-hydrogen exchanger (NHE) activity. Compared with Neo cells, a single treatment of BI-1 cells with the NHE inhibitor EIPA or siRNA against NHE significantly increased cell death, which suggests that the viability of BI-1 cells is affected by the maintenance of intracellular pH homeostasis through NHE.
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Affiliation(s)
- Geum-Hwa Lee
- Department of Pharmacology, School of Medicine, Chonbuk National University, Jeonju 560-182, Korea
| | - Hyung-Ryong Kim
- Department of Dental Pharmacology, Wonkwang Dental Research Institute, School of Dentistry, Wonkwang University, Iksan 570-749, Korea
| | - Han-Jung Chae
- Department of Pharmacology, School of Medicine, Chonbuk National University, Jeonju 560-182, Korea
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50
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Chang Y, Bruni R, Kloss B, Assur Z, Kloppmann E, Rost B, Hendrickson WA, Liu Q. Structural basis for a pH-sensitive calcium leak across membranes. Science 2014; 344:1131-5. [PMID: 24904158 DOI: 10.1126/science.1252043] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Calcium homeostasis balances passive calcium leak and active calcium uptake. Human Bax inhibitor-1 (hBI-1) is an antiapoptotic protein that mediates a calcium leak and is representative of a highly conserved and widely distributed family, the transmembrane Bax inhibitor motif (TMBIM) proteins. Here, we present crystal structures of a bacterial homolog and characterize its calcium leak activity. The structure has a seven-transmembrane-helix fold that features two triple-helix sandwiches wrapped around a central C-terminal helix. Structures obtained in closed and open conformations are reversibly interconvertible by change of pH. A hydrogen-bonded, pKa (where Ka is the acid dissociation constant)-perturbed pair of conserved aspartate residues explains the pH dependence of this transition, and biochemical studies show that pH regulates calcium influx in proteoliposomes. Homology models for hBI-1 provide insights into TMBIM-mediated calcium leak and cytoprotective activity.
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Affiliation(s)
- Yanqi Chang
- New York Consortium on Membrane Protein Structure, New York Structural Biology Center, New York, NY 10027, USA
| | - Renato Bruni
- New York Consortium on Membrane Protein Structure, New York Structural Biology Center, New York, NY 10027, USA
| | - Brian Kloss
- New York Consortium on Membrane Protein Structure, New York Structural Biology Center, New York, NY 10027, USA
| | - Zahra Assur
- Department of Physiology and Cellular Biophysics, Columbia University, New York, NY 10032, USA
| | - Edda Kloppmann
- New York Consortium on Membrane Protein Structure, New York Structural Biology Center, New York, NY 10027, USA. Department of Bioinformatics and Computational Biology, Fakultät für Informatik, Technische Universität München, Garching, Germany
| | - Burkhard Rost
- New York Consortium on Membrane Protein Structure, New York Structural Biology Center, New York, NY 10027, USA. Department of Bioinformatics and Computational Biology, Fakultät für Informatik, Technische Universität München, Garching, Germany
| | - Wayne A Hendrickson
- New York Consortium on Membrane Protein Structure, New York Structural Biology Center, New York, NY 10027, USA. Department of Physiology and Cellular Biophysics, Columbia University, New York, NY 10032, USA. New York Structural Biology Center, National Synchrotron Light Source (NSLS) X4, Brookhaven National Laboratory, Upton, NY 11973, USA. Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA
| | - Qun Liu
- New York Consortium on Membrane Protein Structure, New York Structural Biology Center, New York, NY 10027, USA. New York Structural Biology Center, National Synchrotron Light Source (NSLS) X4, Brookhaven National Laboratory, Upton, NY 11973, USA.
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