1
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Tibenda JJ, Wang N, Li N, Dang Y, Zhu Y, Wang X, Zhang Z, Zhao Q. Research progress of circular RNAs in myocardial ischemia. Life Sci 2024; 352:122809. [PMID: 38908786 DOI: 10.1016/j.lfs.2024.122809] [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: 02/08/2024] [Revised: 05/18/2024] [Accepted: 06/04/2024] [Indexed: 06/24/2024]
Abstract
Circular RNAs (circRNAs) are a type of single-stranded RNA that forms a covalently closed continuous loop. Its structure, stability, properties, and cell- and tissue-specificity have gained considerable recognition in the research and clinical sectors, as its role has been observed in different diseases, such as cardiovascular diseases, cancers, and central nervous system diseases, etc. Cardiovascular disease is still named as the number one cause of death globally, with myocardial ischemia (MI) accounting for 15 % of mortality annually. A number of circRNAs have been identified and are being studied for their ability to reduce MI by inhibiting the molecular mechanisms associated with myocardial ischemia reperfusion injury, such as inflammation, oxidative stress, autophagy, apoptosis, and so on. CircRNAs play a significant role as crucial regulatory elements at transcriptional levels, regulating different proteins, and at posttranscriptional levels, having interactions with RNA-binding proteins, ribosomal proteins, micro-RNAS, and long non-coding RNAS, making it possible to exert their effects through the circRNA-miRNA-mRNA axis. CircRNAs are a potential novel biomarker and therapeutic target for myocardial ischemia and cardiovascular diseases in general. The purpose of this review is to summarize the relationship, function, and mechanism observed between circRNAs and MI injury, as well as to provide directions for future research and clinical trials.
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Affiliation(s)
- Jonnea Japhet Tibenda
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University, Ningxia, China
| | - Niuniu Wang
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University, Ningxia, China
| | - Nuan Li
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University, Ningxia, China
| | - Yanning Dang
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University, Ningxia, China
| | - Yafei Zhu
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University, Ningxia, China
| | - Xiaobo Wang
- Innovative Institute of Chinese Medicine and Pharmacy/Academy for Interdiscipline, Chengdu University of Traditional Chinese Medicine, Chengdu, China.
| | - Zhengjun Zhang
- Department of Cardiology, General Hospital of Ningxia Medical University, Ningxia, China.
| | - Qipeng Zhao
- School of Pharmacy, Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University, Ningxia, China.
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2
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Wei L, Feng Z, Dou Q, Tan L, Zhao X, Hao B. Dysregulation of MTFR2, ATP5IF1 and BAK1 in Sertoli cells relates to idiopathic non-obstructive azoospermia via inhibiting mitochondrial fission and inducing mitochondrial dysfunction†. Biol Reprod 2024; 110:408-418. [PMID: 37903059 DOI: 10.1093/biolre/ioad150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 09/28/2023] [Accepted: 10/24/2023] [Indexed: 11/01/2023] Open
Abstract
Non-obstructive azoospermia affects more than 10% of infertile men with over 70% patients are idiopathic with uncharacterized molecular mechanisms, which is referred as idiopathic non-obstructive azoospermia. In this study, we checked the morphology of Sertoli cell mitochondria in testis biopsies from patients with idiopathic non-obstructive azoospermia and patients with obstructive azoospermia who have normal spermiogenesis. The expression of 104 genes controlling mitochondria fission and fusion were analyzed in three gene expression datasets including a total of 60 patients with non-obstructive azoospermia. The levels of 7 candidate genes were detected in testis biopsies from 38 patients with idiopathic non-obstructive azoospermia and 24 patients with obstructive azoospermia who have normal spermatogenesis by RT-qPCR. Cell viability, apoptosis, mitochondria membrane potential, adenosine triphosphate production, oxygen consumption, and mitochondria morphology were examined in primary human Sertoli cells. Mouse spermatogonial stem cells were used to detect the cell supporting capacity of Sertoli cells. We observed that patients with idiopathic non-obstructive azoospermia had elongated mitochondria. MTFR2 and ATP5IF1 were downregulated, whereas BAK1 was upregulated in idiopathic non-obstructive azoospermia testis and Sertoli cells. Sertoli cells from patients with idiopathic non-obstructive azoospermia had reduced viability, mitochondria membrane potential, adenosine triphosphate production, oxygen consumption rate, glycolysis and increased apoptosis. Knockdown MTFR2 in Sertoli cells increased the mitochondria size. Knockdown ATP5IF1 did not change mitochondrial morphology but increased adenosine triphosphate hydrolysis. Overexpression of BAK1 reduced membrane potential and upregulated cell apoptosis. The dysregulation of all these three genes contributed to the dysfunction of Sertoli cells, which provides a clue for idiopathic non-obstructive azoospermia treatment.
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Affiliation(s)
- Lei Wei
- Reproductive Medical Center, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Zonggang Feng
- Reproductive Medical Center, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Qian Dou
- Reproductive Medical Center, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Li Tan
- Reproductive Medical Center, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Xinghua Zhao
- Department of Urology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Bin Hao
- Department of Urology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
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3
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Covill-Cooke C, Kwizera B, López-Doménech G, Thompson CO, Cheung NJ, Cerezo E, Peterka M, Kittler JT, Kornmann B. Shared structural features of Miro binding control mitochondrial homeostasis. EMBO J 2024; 43:595-614. [PMID: 38267654 PMCID: PMC10897228 DOI: 10.1038/s44318-024-00028-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 12/14/2023] [Accepted: 12/15/2023] [Indexed: 01/26/2024] Open
Abstract
Miro proteins are universally conserved mitochondrial calcium-binding GTPases that regulate a multitude of mitochondrial processes, including transport, clearance, and lipid trafficking. The exact role of Miro in these functions is unclear but involves binding to a variety of client proteins. How this binding is operated at the molecular level and whether and how it is important for mitochondrial health, however, remains unknown. Here, we show that known Miro interactors-namely, CENPF, Trak, and MYO19-all use a similar short motif to bind the same structural element: a highly conserved hydrophobic pocket in the first calcium-binding domain of Miro. Using these Miro-binding motifs, we identified direct interactors de novo, including MTFR1/2/1L, the lipid transporters Mdm34 and VPS13D, and the ubiquitin E3-ligase Parkin. Given the shared binding mechanism of these functionally diverse clients and its conservation across eukaryotes, we propose that Miro is a universal mitochondrial adaptor coordinating mitochondrial health.
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Affiliation(s)
- Christian Covill-Cooke
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK.
| | - Brian Kwizera
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
| | - Guillermo López-Doménech
- Department of Neuroscience, Physiology and Pharmacology, University College London, Gower Street, London, WC1E 6BT, UK
| | - Caleb Od Thompson
- Department of Neuroscience, Physiology and Pharmacology, University College London, Gower Street, London, WC1E 6BT, UK
| | - Ngaam J Cheung
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
| | - Ema Cerezo
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
| | - Martin Peterka
- Institute of Biochemistry, ETH Zurich, 8093, Zurich, Switzerland
| | - Josef T Kittler
- Department of Neuroscience, Physiology and Pharmacology, University College London, Gower Street, London, WC1E 6BT, UK
| | - Benoît Kornmann
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK.
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4
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Myllymäki H, Kelly L, Elliot AM, Carter RN, Johansson JA, Chang KY, Cholewa-Waclaw J, Morton NM, Feng Y. Preneoplastic cells switch to Warburg metabolism from their inception exposing multiple vulnerabilities for targeted elimination. Oncogenesis 2024; 13:7. [PMID: 38272902 PMCID: PMC10810875 DOI: 10.1038/s41389-024-00507-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 01/03/2024] [Accepted: 01/12/2024] [Indexed: 01/27/2024] Open
Abstract
Otto Warburg described tumour cells as displaying enhanced aerobic glycolysis whilst maintaining defective oxidative phosphorylation (OXPHOS) for energy production almost 100 years ago [1, 2]. Since then, the 'Warburg effect' has been widely accepted as a key feature of rapidly proliferating cancer cells [3-5]. What is not clear is how early "Warburg metabolism" initiates in cancer and whether changes in energy metabolism might influence tumour progression ab initio. We set out to investigate energy metabolism in the HRASG12V driven preneoplastic cell (PNC) at inception, in a zebrafish skin PNC model. We find that, within 24 h of HRASG12V induction, PNCs upregulate glycolysis and blocking glycolysis reduces PNC proliferation, whilst increasing available glucose enhances PNC proliferation and reduces apoptosis. Impaired OXPHOS accompanies enhanced glycolysis in PNCs, and a mild complex I inhibitor, metformin, selectively suppresses expansion of PNCs. Enhanced mitochondrial fragmentation might be underlining impaired OXPHOS and blocking mitochondrial fragmentation triggers PNC apoptosis. Our data indicate that altered energy metabolism is one of the earliest events upon oncogene activation in somatic cells, which allows a targeted and effective PNC elimination.
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Affiliation(s)
- Henna Myllymäki
- Centre for Inflammation Research, Institute for Regeneration and Repair, The University of Edinburgh, Edinburgh, EH16 4UU, UK
- Fimlab Laboratoriot Oy Ltd, Arvo Ylpön katu 4, 33520, Tampere, Finland
| | - Lisa Kelly
- Centre for Inflammation Research, Institute for Regeneration and Repair, The University of Edinburgh, Edinburgh, EH16 4UU, UK
| | - Abigail M Elliot
- Centre for Inflammation Research, Institute for Regeneration and Repair, The University of Edinburgh, Edinburgh, EH16 4UU, UK
- Cancer Research UK Scotland Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
| | - Roderick N Carter
- University/British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Queen's Medical Research Institute, Edinburgh, EH16 4TJ, UK
| | - Jeanette Astorga Johansson
- Centre for Inflammation Research, Institute for Regeneration and Repair, The University of Edinburgh, Edinburgh, EH16 4UU, UK
| | - Kai Yee Chang
- Centre for Inflammation Research, Institute for Regeneration and Repair, The University of Edinburgh, Edinburgh, EH16 4UU, UK
| | - Justyna Cholewa-Waclaw
- High Content Screening Facility, Institute for Regeneration and Repair, The University of Edinburgh, Edinburgh, EH16 4UU, UK
| | - Nicholas M Morton
- University/British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Queen's Medical Research Institute, Edinburgh, EH16 4TJ, UK
- Centre for Systems Health and Integrated Metabolic Research, Department of Biosciences, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Yi Feng
- Centre for Inflammation Research, Institute for Regeneration and Repair, The University of Edinburgh, Edinburgh, EH16 4UU, UK.
- Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK.
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5
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Li QY, Guo Q, Luo WM, Luo XY, Ji YM, Xu LQ, Guo JL, Shi RS, Li F, Lin CY, Zhang J, Ke D. Overexpression of MTFR1 promotes cancer progression and drug-resistance on cisplatin and is related to the immune microenvironment in lung adenocarcinoma. Aging (Albany NY) 2024; 16:66-88. [PMID: 38170222 PMCID: PMC10817379 DOI: 10.18632/aging.205338] [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: 07/16/2023] [Accepted: 11/10/2023] [Indexed: 01/05/2024]
Abstract
OBJECTIVE The roles of MTFR1 in the drug resistance of lung adenocarcinoma (LAC) to cisplatin remain unexplored. In this study, the expression, clinical values and mechanisms of MTFR1 were explored, and the relationship between MTFR1 expression and immune microenvironment was investigated in LAC using bioinformatics analysis, cell experiments, and meta-analysis. METHODS MTFR1 expression and clinical values, and the relationship between MTFR1 expression and immunity were explored, through bioinformatics analysis. The effects of MTFR1 on the growth, migration and cisplatin sensitivity of LAC cells were identified using cell counting kit-8, wound healing and Transwell experiments. Additionally, the mechanisms of drug resistance of LAC cells involving MTFR1 were investigated using western blotting. RESULTS MTFR1 was elevated in LAC tissues. MTFR1 overexpression was associated with sex, age, primary therapy outcome, smoking, T stage, unfavourable prognosis and diagnostic value and considered an independent risk factor for an unfavourable prognosis in patients with LAC. MTFR1 co-expressed genes involved in the cell cycle, oocyte meiosis, DNA replication and others. Moreover, interfering with MTFR1 expression inhibited the proliferation, migration and invasion of A549 and A549/DDP cells and promoted cell sensitivity to cisplatin, which was related to the inhibition of p-AKT, p-P38 and p-ERK protein expression. MTFR1 overexpression was associated with stromal, immune and estimate scores along with natural killer cells, pDC, iDC and others in LAC. CONCLUSIONS MTFR1 overexpression was related to the unfavourable prognosis, diagnostic value and immunity in LAC. MTFR1 also participated in cell growth and migration and promoted the drug resistance of LAC cells to cisplatin via the p-AKT and p-ERK/P38 signalling pathways.
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Affiliation(s)
- Qian-Yun Li
- Department of Radiology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Qiang Guo
- Department of Cardiothoracic Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Wei-Min Luo
- Department of Cardiothoracic Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Xiang-Yu Luo
- Department of Cardiothoracic Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Yan-Mei Ji
- Department of Critical Care Medicine, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Li-Qiang Xu
- Department of Cardiothoracic Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Jia-Long Guo
- Department of Cardiothoracic Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Rong-Shu Shi
- Department of Radiology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Feng Li
- Department of Radiology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Cheng-Yi Lin
- Department of Cardiothoracic Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Jun Zhang
- Department of Cardiothoracic Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Di Ke
- Department of Radiology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
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6
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Bellese G, Tagliatti E, Gagliani MC, Santamaria S, Arnaldi P, Falletta P, Rusmini P, Matteoli M, Castagnola P, Cortese K. Neratinib is a TFEB and TFE3 activator that potentiates autophagy and unbalances energy metabolism in ERBB2+ breast cancer cells. Biochem Pharmacol 2023; 213:115633. [PMID: 37269887 DOI: 10.1016/j.bcp.2023.115633] [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: 03/25/2023] [Revised: 05/17/2023] [Accepted: 05/26/2023] [Indexed: 06/05/2023]
Abstract
Neratinib (NE) is an irreversible pan-ERBB tyrosine kinase inhibitor used to treat breast cancers (BCa) with amplification of the ERBB2/HER2/Neu gene or overexpression of the ERBB2 receptor. However, the mechanisms behind this process are not fully understood. Here we investigated the effects of NE on critical cell survival processes in ERBB2+ cancer cells. By kinome array analysis, we showed that NE time-dependently inhibited the phosphorylation of two distinct sets of kinases. The first set, including ERBB2 downstream signaling kinases such as ERK1/2, ATK, and AKT substrates, showed inhibition after 2 h of NE treatment. The second set, which comprised kinases involved in DNA damage response, displayed inhibition after 72 h. Flow cytometry analyses showed that NE induced G0/G1 cell cycle arrest and early apoptosis. By immunoblot, light and electron microscopy, we revealed that NE also transiently induced autophagy, mediated by increased expression levels and nuclear localization of TFEB and TFE3. Altered TFEB/TFE3 expression was accompanied by dysregulation of mitochondrial energy metabolism and dynamics, leading to a decrease in ATP production, glycolytic activity, and a transient downregulation of fission proteins. Increased TFEB and TFE3 expression was also observed in ERBB2-/ERBB1 + BCa cells, supporting that NE may act through other ERBB family members and/or other kinases. Overall, this study highlights NE as a potent activator of TFEB and TFE3, leading to the suppression of cancer cell survival through autophagy induction, cell cycle arrest, apoptosis, mitochondrial dysfunction and inhibition of DNA damage response.
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Affiliation(s)
- Grazia Bellese
- DIMES, Department of Experimental Medicine, Cellular Electron Microscopy Lab, Università di Genova, Genova, Italy
| | - Erica Tagliatti
- IRCCS Humanitas Research Hospital, Laboratory of Pharmacology and Brain Pathology, via Manzoni 56, 20089 Rozzano, Milano, Italy; Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London, United Kingdom
| | - Maria Cristina Gagliani
- DIMES, Department of Experimental Medicine, Cellular Electron Microscopy Lab, Università di Genova, Genova, Italy
| | - Sara Santamaria
- DIMES, Department of Experimental Medicine, Cellular Electron Microscopy Lab, Università di Genova, Genova, Italy
| | - Pietro Arnaldi
- DIMES, Department of Experimental Medicine, Cellular Electron Microscopy Lab, Università di Genova, Genova, Italy
| | - Paola Falletta
- Experimental Imaging Center, IRCCS Ospedale San Raffaele, Milan, Italy; Vita-Salute San Raffaele University, Milan, Italy
| | - Paola Rusmini
- Dipartimento di Scienze Farmacologiche e Biomolecolari "Rodolfo Paoletti", Dipartimento di Eccellenza 2018-2027, Università degli Studi di Milano, Milan, Italy
| | - Michela Matteoli
- IRCCS Humanitas Research Hospital, Laboratory of Pharmacology and Brain Pathology, via Manzoni 56, 20089 Rozzano, Milano, Italy; CNR Institute of Neuroscience, Milano, Italy
| | | | - Katia Cortese
- DIMES, Department of Experimental Medicine, Cellular Electron Microscopy Lab, Università di Genova, Genova, Italy.
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Tilokani L, Russell FM, Hamilton S, Virga DM, Segawa M, Paupe V, Gruszczyk AV, Protasoni M, Tabara LC, Johnson M, Anand H, Murphy MP, Hardie DG, Polleux F, Prudent J. AMPK-dependent phosphorylation of MTFR1L regulates mitochondrial morphology. SCIENCE ADVANCES 2022; 8:eabo7956. [PMID: 36367943 PMCID: PMC9651865 DOI: 10.1126/sciadv.abo7956] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Mitochondria are dynamic organelles that undergo membrane remodeling events in response to metabolic alterations to generate an adequate mitochondrial network. Here, we investigated the function of mitochondrial fission regulator 1-like protein (MTFR1L), an uncharacterized protein that has been identified in phosphoproteomic screens as a potential AMP-activated protein kinase (AMPK) substrate. We showed that MTFR1L is an outer mitochondrial membrane-localized protein modulating mitochondrial morphology. Loss of MTFR1L led to mitochondrial elongation associated with increased mitochondrial fusion events and levels of the mitochondrial fusion protein, optic atrophy 1. Mechanistically, we show that MTFR1L is phosphorylated by AMPK, which thereby controls the function of MTFR1L in regulating mitochondrial morphology both in mammalian cell lines and in murine cortical neurons in vivo. Furthermore, we demonstrate that MTFR1L is required for stress-induced AMPK-dependent mitochondrial fragmentation. Together, these findings identify MTFR1L as a critical mitochondrial protein transducing AMPK-dependent metabolic changes through regulation of mitochondrial dynamics.
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Affiliation(s)
- Lisa Tilokani
- Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Hills Road, CB2 0XY Cambridge, UK
| | - Fiona M. Russell
- Division of Cell Signalling & Immunology, School of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK
| | - Stevie Hamilton
- Department of Neuroscience, Columbia University, New York, NY 10032, USA
| | - Daniel M. Virga
- Department of Neuroscience, Columbia University, New York, NY 10032, USA
| | - Mayuko Segawa
- Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Hills Road, CB2 0XY Cambridge, UK
| | - Vincent Paupe
- Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Hills Road, CB2 0XY Cambridge, UK
| | - Anja V. Gruszczyk
- Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Hills Road, CB2 0XY Cambridge, UK
| | - Margherita Protasoni
- Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Hills Road, CB2 0XY Cambridge, UK
| | - Luis-Carlos Tabara
- Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Hills Road, CB2 0XY Cambridge, UK
| | - Mark Johnson
- Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Hills Road, CB2 0XY Cambridge, UK
| | - Hanish Anand
- Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Hills Road, CB2 0XY Cambridge, UK
| | - Michael P. Murphy
- Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Hills Road, CB2 0XY Cambridge, UK
- Department of Medicine, University of Cambridge, Cambridge, UK
| | - D. Grahame Hardie
- Division of Cell Signalling & Immunology, School of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK
| | - Franck Polleux
- Department of Neuroscience, Columbia University, New York, NY 10032, USA
| | - Julien Prudent
- Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Hills Road, CB2 0XY Cambridge, UK
- Corresponding author.
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8
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Lian Z, Pang P, Zhu Y, Du W, Zhou J. Prognostic Value and Potential Mechanism of MTFR2 in Lung Adenocarcinoma. Front Oncol 2022; 12:832517. [PMID: 35600359 PMCID: PMC9117628 DOI: 10.3389/fonc.2022.832517] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 04/01/2022] [Indexed: 12/24/2022] Open
Abstract
Mitochondrial fission regulator 2 (MTFR2) belongs to the MTFR1 family, which plays a crucial role in regulating oxidative phosphorylation. Recent studies indicate that it also participates in cancer carcinogenesis and development; however, the clinical significance of MTFR2 in lung adenocarcinoma has not been fully confirmed. Our current study investigated the relationships between clinical characteristics and MTFR2 expression based on The Cancer Genome Atlas (TCGA), Gene Expression Omnibus (GSE31210) dataset, and clinical histopathological sample cohort. In addition, Kaplan–Meier and Cox regression analyses were additionally performed to evaluate the association between MTFR2 expression and patient survival. Gene set enrichment analysis (GESA) was conducted to spot possible pathways associated with MTFR2. Moreover, a single-sample GESA (ssGESA) was performed to evaluate the association between MTFR2 expression and immune cell infiltration. Cell colony formation assay, CCK-8 assay, cell cycle assay, and transwell assay were performed to verify the cell proliferation, migration, and invasion abilities after interfering with MTFR2 in lung cancer cells. Western blot assay was applied to identify the underlying protein levels. The results indicated that the elevated MTFR2 expression in lung adenocarcinoma samples correlated with T stage (P < 0.001), N stage (P = 0.005), M stage (P = 0.015), pathological stage (P = 0.002), and TP53 status (P < 0.001). Patients with a higher MTFR2 expression correlated with poorer overall survival (P < 0.01) and progression-free survival (P = 0.002). Knockdown of MTFR2 inhibited cell proliferation, migration, and invasion via AKT-cyclin D1 signaling and EMT pathways. Moreover, MTFR2 expression significantly positively correlated with Th2 cells (P < 0.001). Taken together, MTFR2 could serve as a novel prognostic indicator and therapeutic target for lung adenocarcinoma.
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Affiliation(s)
- Zengzhi Lian
- Department of Pulmonary and Critical Care Medicine, Taicang Affiliated Hospital of Soochow University, Suzhou, China
| | - Pei Pang
- Department of Pathology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Yan Zhu
- Department of Emergency and Critical Care Medicine, Changzheng Hospital of Second Military Medical University, Shanghai, China
| | - Wenwen Du
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Jintao Zhou
- Department of Pulmonary and Critical Care Medicine, Taicang Affiliated Hospital of Soochow University, Suzhou, China
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9
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Li H, Zhu X, Zhang W, Lu W, Liu C, Ma J, Zang R, Song Y. Association of High Expression of Mitochondrial Fission Regulator 2 with Poor Survival of Patients with Esophageal Squamous Cell Carcinoma. J Cancer Prev 2021; 26:250-257. [PMID: 35047451 PMCID: PMC8749323 DOI: 10.15430/jcp.2021.26.4.250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/20/2021] [Accepted: 09/23/2021] [Indexed: 11/03/2022] Open
Abstract
Mitochondrial fission regulator 2 (MTFR2) is associated with mitochondrial fission, while few studies have assessed the associations between MTFR2 expression and clinical characteristics or prognosis of esophageal squamous cell carcinoma (ESCC). In this study, we compared the expression of MTFR2 in 6 ESCC tumors and relative normal tissues by immunohistochemistry (IHC). To assess the effect of MTFR2 expression on clinicopathologic characteristics and survival, 115 paraffin embedded ESCC tissue samples were assessed by IHC staining. Furthermore, the association between clinicopathological properties and MTFR2 expression in patients with ESCC was examined. The survival analysis was performed using the Cox regression models. We found that MTFR2 expression was significantly increased in ESCC tumors compared with normal esophageal epithelial cells. IHC analysis of 115 paraffin embedded ESCC tumor specimens of the patients showed that the expression of MTFR2 was significantly associated with clinical stage (P < 0.001), tumor classification (P < 0.001), histological grade (P < 0.001), and other clinicopathological characteristics. Both univariate and multivariate analyses showed that MTFR2 expression was inversely correlated with the survival of ESCC patients. In conclusion, the expression of MTFR2 is significantly associated with clinicopathologic characteristics and prognosis of ESCC. Thus, MTFR2 expression could serve as a potentially important prognostic biomarker and clinical target for patients with ESCC.
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Affiliation(s)
- Hongwei Li
- Department of Radiation Oncology, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
| | - Xingzhuang Zhu
- Department of Radiation Oncology, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China.,Department of Oncology, School of Medicine, Qingdao University, Qingdao, China
| | - Wei Zhang
- Department of Radiation Oncology, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
| | - Wenjie Lu
- Department of Radiation Oncology, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China.,Department of Oncology, School of Medicine, Qingdao University, Qingdao, China
| | - Chuan Liu
- Department of Otorhinolaryngology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jinbo Ma
- Department of Radiation Oncology, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
| | - Rukun Zang
- Department of Radiation Oncology, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
| | - Yipeng Song
- Department of Radiation Oncology, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China.,Department of Oncology, School of Medicine, Qingdao University, Qingdao, China
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10
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Li Y, Liu Y, Jin K, Dong R, Gao C, Si L, Feng Z, Zhang H, Tian H. Negatively Regulated by miR-29c-3p, MTFR1 Promotes the Progression and Glycolysis in Lung Adenocarcinoma via the AMPK/mTOR Signalling Pathway. Front Cell Dev Biol 2021; 9:771824. [PMID: 34926459 PMCID: PMC8672271 DOI: 10.3389/fcell.2021.771824] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 11/18/2021] [Indexed: 12/25/2022] Open
Abstract
Background: Lung adenocarcinoma (LUAD) is the major form of lung cancer that presents a major peril to public health. Owing to the high rates of morbidity, mortality and chemoresistance, it is necessary to develop more effective therapeutic targets of LUAD. Mitochondrial fission regulator 1 (MTFR1) affects the occurrence and development of some diseases by regulating mitochondrial dynamics and is dysregulated in LUAD. However, the functions and molecular mechanisms of MTFR1 in LUAD have not been investigated. Methods: Immunohistochemical (IHC) analysis, real-time quantitative polymerase chain reaction (RT-qPCR), bioinformatic analysis and western blot (WB) were performed to assess the expression of MTFR1 at both protein and mRNA levels. The biological functions of MTFR1 in LUAD cells were assessed based on various in vivo and in vitro experiments. The dual-luciferase reporter assay and some rescue experiments were performed to evaluate the underlying mechanism of MTFR1 in LUAD. Results: MTFR1 was upregulated in LUAD cells and tissues and correlated with dismal clinicopathologic features and a worse prognosis of patients with LUAD. Functionally, MTFR1 overexpression stimulated the proliferation, invasion, migration and glycolytic capacity and impeded the apoptosis of LUAD cells; however, opposite results were obtained when MTFR1 expression was knocked down. MTFR1, which was directly targeted by miR-29c-3p, may exert its biological functions through the AMPK/mTOR signalling pathway. Conclusion: MTFR1 promotes the progression of LUAD. Therefore, targeting MTFR1 can offer an effective therapeutic strategy for LUAD treatment.
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Affiliation(s)
- Yongmeng Li
- Department of Thoracic Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yanfei Liu
- Department of Anesthesiology, Qilu Children's Hospital of Shandong University, Jinan, China
| | - Kai Jin
- Department of Thoracic Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Rui Dong
- Department of Thoracic Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Cun Gao
- Department of Thoracic Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Libo Si
- Department of Thoracic Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Zitong Feng
- Department of Thoracic Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Huiying Zhang
- Department of Thoracic Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Hui Tian
- Department of Thoracic Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
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11
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Xie Y, Chen R, Yan L, Jia Z, Liang G, Wang Q. Transcription factor HOXC10 activates the expression of MTFR2 to regulate the proliferation, invasion and migration of colorectal cancer cells. Mol Med Rep 2021; 24:797. [PMID: 34523692 PMCID: PMC8456344 DOI: 10.3892/mmr.2021.12437] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 06/25/2021] [Indexed: 12/09/2022] Open
Abstract
HOXC10 and mitochondrial fission regulator 2 (MTFR2) have been reported to be abnormally expressed in multiple types of cancer tissues. However, the effects of HOXC10 and MTFR2 on colorectal cancer (CRC) remain poorly understood. Therefore, the present study aimed to investigate the expression of HOXC10 and MTFR2 in CRC tissues and cells, and analyze their effects on CRC cell proliferation, invasion and migration. Reverse transcription‑quantitative PCR and western blotting were used to detect the expression levels of MTFR2 and HOXC10 in tissues and cells. To investigate the association between MTFR2 and HOXC10, short hairpin RNA‑MTFR2 and overexpression vector‑HOXC10 were transfected into the cells, respectively. Furthermore, western blotting was performed to detect the expression levels of invasion‑associated proteins. The proliferation, clone formation, invasion and migration of colorectal cancer cells were in turn analyzed by the Cell Counting Kit‑8, clone formation, wound healing and Transwell assays. Japan Automotive Software Platform and Architecture software predicted the binding sites between HOXC10 and MTFR2, which was confirmed by the dual‑luciferase reporter assay and chromatin immunoprecipitation. The present study demonstrated that HOXC10 and MTFR2 mRNA and protein expression levels were significantly upregulated in CRC tissues and cells. MTFR2 knockdown significantly inhibited CRC cell proliferation, clone formation, invasion and migration. Furthermore, HOXC10 was shown to interact with MTFR2. HOXC10 overexpression was able to significantly reverse the inhibitory effects of MTFR2 knockdown on CRC cells. In conclusion, HOXC10 overexpression activated MTFR2 expression to enhance the proliferation, clone formation, invasion and migration of CRC cells.
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Affiliation(s)
- Ying Xie
- Department of Clinical Laboratory, Jiangsu Cancer Hospital, Nanjing, Jiangsu 210009, P.R. China
| | - Ran Chen
- Department of Clinical Laboratory, Jiangsu Cancer Hospital, Nanjing, Jiangsu 210009, P.R. China
| | - Liujia Yan
- Department of Clinical Laboratory, Jiangsu Cancer Hospital, Nanjing, Jiangsu 210009, P.R. China
| | - Zhangjun Jia
- Department of Clinical Laboratory, Jiangsu Cancer Hospital, Nanjing, Jiangsu 210009, P.R. China
| | - Guangshu Liang
- Department of Clinical Laboratory, Jiangsu Cancer Hospital, Nanjing, Jiangsu 210009, P.R. China
| | - Qin Wang
- Department of Clinical Laboratory, Jiangsu Cancer Hospital, Nanjing, Jiangsu 210009, P.R. China
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12
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A proximity-dependent biotinylation map of a human cell. Nature 2021; 595:120-124. [PMID: 34079125 DOI: 10.1038/s41586-021-03592-2] [Citation(s) in RCA: 202] [Impact Index Per Article: 67.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 04/29/2021] [Indexed: 02/05/2023]
Abstract
Compartmentalization is a defining characteristic of eukaryotic cells, and partitions distinct biochemical processes into discrete subcellular locations. Microscopy1 and biochemical fractionation coupled with mass spectrometry2-4 have defined the proteomes of a variety of different organelles, but many intracellular compartments have remained refractory to such approaches. Proximity-dependent biotinylation techniques such as BioID provide an alternative approach to define the composition of cellular compartments in living cells5-7. Here we present a BioID-based map of a human cell on the basis of 192 subcellular markers, and define the intracellular locations of 4,145 unique proteins in HEK293 cells. Our localization predictions exceed the specificity of previous approaches, and enabled the discovery of proteins at the interface between the mitochondrial outer membrane and the endoplasmic reticulum that are crucial for mitochondrial homeostasis. On the basis of this dataset, we created humancellmap.org as a community resource that provides online tools for localization analysis of user BioID data, and demonstrate how this resource can be used to understand BioID results better.
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13
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Zhu H, Wang G, Zhu H, Xu A. MTFR2, A Potential Biomarker for Prognosis and Immune Infiltrates, Promotes Progression of Gastric Cancer Based on Bioinformatics Analysis and Experiments. J Cancer 2021; 12:3611-3625. [PMID: 33995638 PMCID: PMC8120185 DOI: 10.7150/jca.58158] [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: 01/13/2021] [Accepted: 04/15/2021] [Indexed: 12/24/2022] Open
Abstract
Background: Mitochondrial fission regulator 2 (MTFR2) which can promote mitochondrial fission, has recently been reported to be involved in tumorigenesis. However, little is known about its expression levels and function in gastric cancer (GC). This study aims to clarify the role of MTFR2 in GC. Methods:We firstly determined the expression level and prognostic value of MTFR2 in GC by integrated bioinformatics (Oncomine, GEPIA, Kaplan-Meier Plotter database) and experimental approaches (RT-qPCR, western blot, immunohistochemistry). After constructing stable down-regulated GC cells, the biological functions of MTFR2 in vitro and in vivo were studied through cell clone formation, wound healing, transwell and tumor formation experiments.To understand the reason for the high expression of MTFR2 in GC, copy number alternation, promoter methylation and mutation of MTFR2 were detected by UALCAN and cBioPortal. TargetScanHuman and PROMO databases were also used to explore the miRNAs and transcription factors of MTFR2, and the regulatory network was visualized by Cytoscape. LinkedOmics was used to detect the co-expression profile, and then these co-expressed genes were used for gene oncology function and pathway enrichment analysis to deepen the understanding of MTFR2 mechanism. The protein interaction network of MTFR2 was constructed by the GeneMANIA platform. Docking study of the binding mode was conducted by H DOCK webserver, and PYMOL is used for visualization, and analysis. TIMER database was used to explore the correlation between MTFR2 expression level and immune cells infiltration and gene markers of tumor infiltrating immune cells. Results: We demonstrated that MTFR2 was up-regulated in GC, and its overexpression led to poorer prognosis. MTFR2 downregulation inhibited the proliferation, migration, and invasion of GC cells in vitro and in vivo. By bioinformatics analysis, we identified the possible factors in MTFR2 overexpression. Moreover, function and pathway enrichment analyses found that MTFR2 was involved in chromosome segregation, catalytic activity, cell cycle, and ribonucleic acid transport. A MTFR2-protein interaction network revealed a potential direct protein interaction between MTFR2 and protein kinase adenosine-monophosphate-activated catalytic subunit alpha 1 (PRKAA1), and their potential binding site was predicted in a molecular docking model. In addition, we also found that MTFR2 may be correlated with immune infiltration in GC. Conclusions: Our study has effectively revealed the expression, prognostic value, potential functional networks, protein interactions and immune infiltration of MTFR2 in GC. Altogether, our data identify the possible underlying mechanisms of MTFR2 and suggest that MTFR2 may be a prognostic biomarker and therapeutic target in GC.
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Affiliation(s)
- Hai Zhu
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei 230001, People's Republic of China
| | - Gang Wang
- Department of General Surgery, The Fourth Affiliated Hospital of Anhui Medical University, Hefei 230001, People's Republic of China
| | - Haixing Zhu
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230031, People's Republic of China
| | - Aman Xu
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei 230001, People's Republic of China.,Department of General Surgery, The Fourth Affiliated Hospital of Anhui Medical University, Hefei 230001, People's Republic of China
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Wang L, Liu W, Liu J, Wang Y, Tai J, Yin X, Tan J. Identification of Immune-Related Therapeutically Relevant Biomarkers in Breast Cancer and Breast Cancer Stem Cells by Transcriptome-Wide Analysis: A Clinical Prospective Study. Front Oncol 2021; 10:554138. [PMID: 33718103 PMCID: PMC7945036 DOI: 10.3389/fonc.2020.554138] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 12/31/2020] [Indexed: 12/18/2022] Open
Abstract
Cancer stem cells (CSCs) represent a subset of tumor cells that are responsible for recurrence and metastasis of tumors. These cells are resistant to radiotherapy and chemotherapy. Immunotherapeutic strategies that target CSCs specifically have provided initial results; however, the mechanism of action of these strategies is unclear. The data were requested from The Cancer Genome Atlas and Genotype-Tissue Expression, followed with the survival analysis and weighted gene co-expression network analysis to detect survival and stemness related genes. Patients were divided into three groups based on their immune status by applying single sample GSEA (ssGSEA) with proven dependability by ESTIMATE analysis. The filtered key genes were analyzed using oncomine, GEPIA, HPA, qRT-PCR, and functional analysis. Patients in a group with a higher stemness and a lower immune infiltration showed a worse overall survival probability, stemness and immune infiltration characteristics of breast cancer progressed in a non-linear fashion. Thirteen key genes related to stemness and immunity were identified and the functional analysis indicated their crucial roles in cell proliferation and immune escape strategies. The qRT-PCR results showed that the expression of PIMREG and MTFR2 differed in different stages of patients. Our study revealed a promising potential for CSC-target immunotherapy in the early stage of cancer and a probable value for PIMREG and MTFR2 as biomarkers and targets for immunotherapy.
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Affiliation(s)
- Linbang Wang
- Department of Orthopedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Wei Liu
- Department of Orthopedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jingkun Liu
- Department of Orthopedics, Honghui Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Yuanyuan Wang
- Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jiaojiao Tai
- Department of Orthopedics, Honghui Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Xuedong Yin
- Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jinxiang Tan
- Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
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15
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Lu W, Zang R, Du Y, Li X, Li H, Liu C, Song Y, Li Y, Wang Y. Overexpression of MTFR2 Predicts Poor Prognosis of Breast Cancer. Cancer Manag Res 2020; 12:11095-11102. [PMID: 33173342 PMCID: PMC7646465 DOI: 10.2147/cmar.s272088] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 10/01/2020] [Indexed: 01/06/2023] Open
Abstract
Background Mitochondrial fission regulator 2 (MTFR2) has been reported to promote proliferation, migration and invasion in tumors; however, little is known about its function in breast cancer. Thus, we investigated the effect of MTFR2 expression on prognosis of breast cancer. Methods The expression of MTFR2 in breast cancer tissues was detected by immunohistochemistry, and overall survival (OS) and recurrence free survival (RFS) were evaluated by the Log rank test and Cox model. Results We found that MTFR2 expression was significantly associated with clinical stage (P<0.001), T classification (P=0.005), N classification (P=0.001), M classification (P=0.041), HER2 expression (P= 0.001), and molecular subtypes (P=0.002), respectively. Compared with low MTFR2 expression, the patients with higher expression of MTFR2 exhibited significantly shorter OS and RFS (All P < 0.001). Both univariate and multivariate analyses showed that MTFR2 was an independent prognostic factor for OS (HR, 2.8, 95% CI 1.1-6.8, P = 0.023) and RFS (HR, 2.8, 95% CI 1.2-6.4, P = 0.015) in breast cancer patients. Moreover, in HER2 positive and TNBC subtype, the associations between high MTFR2 expression and poor OS and RFS were more pronounced. Conclusion Taken together, our results demonstrated that high MTFR2 expression was associated with poor prognosis of breast cancer patients, and such an association was more pronounced in the patients with aggressive tumors. Therefore, MTFR2 expression might be a potentially important prognostic biomarker and clinical target for patients with breast cancer.
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Affiliation(s)
- Wenjie Lu
- Department of Radiation Oncology, Yantai Yuhuangding Hospital, Affiliated Hospital of Qingdao University, Yantai, Shandong, People's Republic of China
| | - Rukun Zang
- Department of Radiation Oncology, Yantai Yuhuangding Hospital, Affiliated Hospital of Qingdao University, Yantai, Shandong, People's Republic of China
| | - Yuanna Du
- Department of Radiation Oncology, Yantai Yuhuangding Hospital, Affiliated Hospital of Qingdao University, Yantai, Shandong, People's Republic of China
| | - Xinghua Li
- Department of Radiation Oncology, Yantai Yuhuangding Hospital, Affiliated Hospital of Qingdao University, Yantai, Shandong, People's Republic of China
| | - Hongwei Li
- Department of Radiation Oncology, Yantai Yuhuangding Hospital, Affiliated Hospital of Qingdao University, Yantai, Shandong, People's Republic of China
| | - Chuan Liu
- Department of Otorhinolaryngology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Yipeng Song
- Department of Radiation Oncology, Yantai Yuhuangding Hospital, Affiliated Hospital of Qingdao University, Yantai, Shandong, People's Republic of China
| | - Yuncheng Li
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Yang Wang
- Department of Radiation Oncology, Yantai Yuhuangding Hospital, Affiliated Hospital of Qingdao University, Yantai, Shandong, People's Republic of China
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16
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Morelli AM, Ravera S, Panfoli I. The aerobic mitochondrial ATP synthesis from a comprehensive point of view. Open Biol 2020; 10:200224. [PMID: 33081639 PMCID: PMC7653358 DOI: 10.1098/rsob.200224] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Most of the ATP to satisfy the energetic demands of the cell is produced by the F1Fo-ATP synthase (ATP synthase) which can also function outside the mitochondria. Active oxidative phosphorylation (OxPhos) was shown to operate in the photoreceptor outer segment, myelin sheath, exosomes, microvesicles, cell plasma membranes and platelets. The mitochondria would possess the exclusive ability to assemble the OxPhos molecular machinery so to share it with the endoplasmic reticulum (ER) and eventually export the ability to aerobically synthesize ATP in true extra-mitochondrial districts. The ER lipid rafts expressing OxPhos components is indicative of the close contact of the two organelles, bearing different evolutionary origins, to maximize the OxPhos efficiency, exiting in molecular transfer from the mitochondria to the ER. This implies that its malfunctioning could trigger a generalized oxidative stress. This is consistent with the most recent interpretations of the evolutionary symbiotic process whose necessary prerequisite appears to be the presence of the internal membrane system inside the eukaryote precursor, of probable archaeal origin allowing the engulfing of the α-proteobacterial precursor of mitochondria. The process of OxPhos in myelin is here studied in depth. A model is provided contemplating the biface arrangement of the nanomotor ATP synthase in the myelin sheath.
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Affiliation(s)
- Alessandro Maria Morelli
- Pharmacy Department (DIFAR), Biochemistry Laboratory, University of Genova, Viale Benedetto XV, 3, 16132 Genova, Italy
| | - Silvia Ravera
- Experimental Medicine Department (DIMES), University of Genova, Via De Toni, 14, 16132 Genova, Italy
| | - Isabella Panfoli
- Pharmacy Department (DIFAR), Biochemistry Laboratory, University of Genova, Viale Benedetto XV, 3, 16132 Genova, Italy
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Cho KF, Branon TC, Rajeev S, Svinkina T, Udeshi ND, Thoudam T, Kwak C, Rhee HW, Lee IK, Carr SA, Ting AY. Split-TurboID enables contact-dependent proximity labeling in cells. Proc Natl Acad Sci U S A 2020; 117:12143-12154. [PMID: 32424107 PMCID: PMC7275672 DOI: 10.1073/pnas.1919528117] [Citation(s) in RCA: 155] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Proximity labeling catalyzed by promiscuous enzymes, such as TurboID, have enabled the proteomic analysis of subcellular regions difficult or impossible to access by conventional fractionation-based approaches. Yet some cellular regions, such as organelle contact sites, remain out of reach for current PL methods. To address this limitation, we split the enzyme TurboID into two inactive fragments that recombine when driven together by a protein-protein interaction or membrane-membrane apposition. At endoplasmic reticulum-mitochondria contact sites, reconstituted TurboID catalyzed spatially restricted biotinylation, enabling the enrichment and identification of >100 endogenous proteins, including many not previously linked to endoplasmic reticulum-mitochondria contacts. We validated eight candidates by biochemical fractionation and overexpression imaging. Overall, split-TurboID is a versatile tool for conditional and spatially specific proximity labeling in cells.
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Affiliation(s)
- Kelvin F Cho
- Cancer Biology Program, Stanford University, Stanford, CA 94305
| | - Tess C Branon
- Department of Genetics, Stanford University, Stanford, CA 94305
- Department of Biology, Stanford University, Stanford, CA 94305
- Department of Chemistry, Stanford University, Stanford, CA 94305
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Sanjana Rajeev
- Department of Genetics, Stanford University, Stanford, CA 94305
| | | | | | - Themis Thoudam
- Research Institute of Aging and Metabolism, Kyungpook National University, 37224 Daegu, South Korea
| | - Chulhwan Kwak
- Department of Chemistry, Seoul National University, 08826 Seoul, South Korea
- Department of Chemistry, Ulsan National Institute of Science and Technology, 44919 Ulsan, South Korea
| | - Hyun-Woo Rhee
- Department of Chemistry, Seoul National University, 08826 Seoul, South Korea
- School of Biological Sciences, Seoul National University, 08826 Seoul, South Korea
| | - In-Kyu Lee
- Research Institute of Aging and Metabolism, Kyungpook National University, 37224 Daegu, South Korea
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, 41944 Daegu, South Korea
- Leading-edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University, 41944 Daegu, South Korea
| | - Steven A Carr
- Broad Institute of MIT and Harvard, Cambridge, MA 02142
| | - Alice Y Ting
- Department of Genetics, Stanford University, Stanford, CA 94305;
- Department of Biology, Stanford University, Stanford, CA 94305
- Department of Chemistry, Stanford University, Stanford, CA 94305
- Chan Zuckerberg Biohub, San Francisco, CA 94158
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18
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Lu G, Lai Y, Wang T, Lin W, Lu J, Ma Y, Chen Y, Ma H, Liu R, Li J. Mitochondrial fission regulator 2 (MTFR2) promotes growth, migration, invasion and tumour progression in breast cancer cells. Aging (Albany NY) 2019; 11:10203-10219. [PMID: 31740625 PMCID: PMC6914410 DOI: 10.18632/aging.102442] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 10/29/2019] [Indexed: 12/11/2022]
Abstract
Introduction: Mitochondrial fission regulator 2 (MTFR2) belongs to the MTFR family, and 2 isoforms of MTFR2 are produced by alternative splicing. The role of MTFR2 in breast cancer (BC) remains unknown. Results: MTFR2 was upregulated in BC tissues and was strongly associated with tumor characteristics. Moreover, Kaplan-Meier and Cox proportional hazards analyses indicated that high MTFR2 expression was related to poor overall survival. In addition, the capacity for migration and invasion decreased in two BC cell lines after knockdown of MTFR2. The epithelial-mesenchymal transition pathway was inhibited in MTFR2-silenced cells. MTFR2 can switch glucose metabolism from OXPHS to glycolysis in a HIF1α- and HIF2α-dependent manner. Conclusion: Taken together, our results indicate that increased expression of MTFR2 is associated with tumour progression in breast cancer cells through switching glucose metabolism from OXPHS to glycolysis in a HIF1α- and HIF2α-dependent manner. Materials and methods: We obtained data from The Cancer Genome Atlas (TCGA) and the Gene Expression Omnibus (GEO) to analyse MTFR2 expression in BC. The prognostic value of MTFR2 expression was assessed using the Kaplan-Meier method. The biological influence of MTFR2 on BC cell lines was studied using proliferation, Transwell migration, invasion and mitochondrial function assays.
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Affiliation(s)
- Guanming Lu
- Department of Breast and Thyroid Surgery, Affiliated Hospital of Youjiang Medical University for Nationalities, Basie, Guangxi, China
| | - Yuanhui Lai
- Department of Breast and Thyroid Surgery, Eastern Hospital of the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Tiantian Wang
- Department of Breast and Thyroid Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Ji'nan, Shandong, China
| | - Weihao Lin
- Department of Breast and Thyroid Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Jinlan Lu
- Department of Stomatology, Affiliated Hospital of Youjiang Medical University for Nationalities, Basie, Guangxi, China
| | - Yanfei Ma
- Department of Breast and Thyroid Surgery, Affiliated Hospital of Youjiang Medical University for Nationalities, Basie, Guangxi, China
| | - Yongcheng Chen
- Department of Breast and Thyroid Surgery, Affiliated Hospital of Youjiang Medical University for Nationalities, Basie, Guangxi, China
| | - Haiqing Ma
- Department of Oncology, Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Ruilei Liu
- Department of Breast and Thyroid Surgery, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Jie Li
- Department of Breast and Thyroid Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China.,Division of Thyroid and Parathyroid Endocrine Surgery, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA 02114, USA
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Huang L, Guo B, Liu S, Miao C, Li Y. Inhibition of the LncRNA Gpr19 attenuates ischemia‐reperfusion injury after acute myocardial infarction by inhibiting apoptosis and oxidative stress via the miR‐324‐5p/Mtfr1 axis. IUBMB Life 2019; 72:373-383. [PMID: 31622017 DOI: 10.1002/iub.2187] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 10/06/2019] [Indexed: 01/05/2023]
Affiliation(s)
- Liu Huang
- Department of Cardiovascular MedicineThe Second Hospital of Hebei Medical University Shijiazhuang Hebei China
| | - Bingyan Guo
- Department of Cardiovascular MedicineThe Second Hospital of Hebei Medical University Shijiazhuang Hebei China
| | - Suyun Liu
- Department of Cardiovascular MedicineThe Second Hospital of Hebei Medical University Shijiazhuang Hebei China
| | - Chenglong Miao
- Department of Cardiovascular MedicineThe Second Hospital of Hebei Medical University Shijiazhuang Hebei China
| | - Yongjun Li
- Department of Cardiovascular MedicineThe Second Hospital of Hebei Medical University Shijiazhuang Hebei China
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20
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Seitz S, Kwon Y, Hartleben G, Jülg J, Sekar R, Krahmer N, Najafi B, Loft A, Gancheva S, Stemmer K, Feuchtinger A, Hrabe de Angelis M, Müller TD, Mann M, Blüher M, Roden M, Berriel Diaz M, Behrends C, Gilleron J, Herzig S, Zeigerer A. Hepatic Rab24 controls blood glucose homeostasis via improving mitochondrial plasticity. Nat Metab 2019; 1:1009-1026. [PMID: 32694843 DOI: 10.1038/s42255-019-0124-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 09/10/2019] [Indexed: 12/18/2022]
Abstract
Non-alcoholic fatty liver disease (NAFLD) represents a key feature of obesity-related type 2 diabetes with increasing prevalence worldwide. To our knowledge, no treatment options are available to date, paving the way for more severe liver damage, including cirrhosis and hepatocellular carcinoma. Here, we show an unexpected function for an intracellular trafficking regulator, the small Rab GTPase Rab24, in mitochondrial fission and activation, which has an immediate impact on hepatic and systemic energy homeostasis. RAB24 is highly upregulated in the livers of obese patients with NAFLD and positively correlates with increased body fat in humans. Liver-selective inhibition of Rab24 increases autophagic flux and mitochondrial connectivity, leading to a strong improvement in hepatic steatosis and a reduction in serum glucose and cholesterol levels in obese mice. Our study highlights a potential therapeutic application of trafficking regulators, such as RAB24, for NAFLD and establishes a conceptual functional connection between intracellular transport and systemic metabolic dysfunction.
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Affiliation(s)
- Susanne Seitz
- Institute for Diabetes and Cancer, Helmholtz Center Munich, Neuherberg, Germany
- German Center for Diabetes Research, Neuherberg, Germany
- Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany
| | - Yun Kwon
- Institute for Diabetes and Cancer, Helmholtz Center Munich, Neuherberg, Germany
- German Center for Diabetes Research, Neuherberg, Germany
- Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany
| | - Götz Hartleben
- Institute for Diabetes and Cancer, Helmholtz Center Munich, Neuherberg, Germany
- German Center for Diabetes Research, Neuherberg, Germany
- Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany
| | - Julia Jülg
- Munich Cluster for Systems Neurology, Ludwig-Maximilians-University München, Munich, Germany
| | - Revathi Sekar
- Institute for Diabetes and Cancer, Helmholtz Center Munich, Neuherberg, Germany
- German Center for Diabetes Research, Neuherberg, Germany
- Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany
| | - Natalie Krahmer
- German Center for Diabetes Research, Neuherberg, Germany
- Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
- Institute for Diabetes and Obesity, Helmholtz Center Munich, Neuherberg, Germany
| | - Bahar Najafi
- Institute for Diabetes and Cancer, Helmholtz Center Munich, Neuherberg, Germany
- German Center for Diabetes Research, Neuherberg, Germany
- Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany
| | - Anne Loft
- Institute for Diabetes and Cancer, Helmholtz Center Munich, Neuherberg, Germany
- German Center for Diabetes Research, Neuherberg, Germany
- Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany
| | - Sofiya Gancheva
- German Center for Diabetes Research, Neuherberg, Germany
- Division of Endocrinology and Diabetology, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich Heine University, Düsseldorf, Germany
| | - Kerstin Stemmer
- German Center for Diabetes Research, Neuherberg, Germany
- Institute for Diabetes and Obesity, Helmholtz Center Munich, Neuherberg, Germany
| | - Annette Feuchtinger
- Research Unit Analytical Pathology, Helmholtz Center Munich, Neuherberg, Germany
| | - Martin Hrabe de Angelis
- German Center for Diabetes Research, Neuherberg, Germany
- Institute of Experimental Genetics, Helmholtz Center Munich German Research Center for Environmental Health, Neuherberg, Germany
- Chair of Experimental Genetics, School of Life Science Weihenstephan, Technische Universität München, Freising, Germany
| | - Timo D Müller
- German Center for Diabetes Research, Neuherberg, Germany
- Institute for Diabetes and Obesity, Helmholtz Center Munich, Neuherberg, Germany
- Department of Pharmacology and Experimental Therapy, Institute of Experimental and Clinical Pharmacology and Toxicology, Eberhard Karls University Hospitals and Clinics, Tübingen, Germany
| | - Matthias Mann
- Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
- NF Center for Protein Research, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Matthias Blüher
- Department of Medicine, University of Leipzig, Leipzig, Germany
| | - Michael Roden
- German Center for Diabetes Research, Neuherberg, Germany
- Division of Endocrinology and Diabetology, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich Heine University, Düsseldorf, Germany
| | - Mauricio Berriel Diaz
- Institute for Diabetes and Cancer, Helmholtz Center Munich, Neuherberg, Germany
- German Center for Diabetes Research, Neuherberg, Germany
- Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany
| | - Christian Behrends
- Munich Cluster for Systems Neurology, Ludwig-Maximilians-University München, Munich, Germany
| | - Jerome Gilleron
- Université Côte d'Azur, Institut National de la Santé et de la Recherche Médicale UMR1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France
| | - Stephan Herzig
- Institute for Diabetes and Cancer, Helmholtz Center Munich, Neuherberg, Germany
- German Center for Diabetes Research, Neuherberg, Germany
- Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany
- Chair Molecular Metabolic Control, Technical University Munich, Munich, Germany
| | - Anja Zeigerer
- Institute for Diabetes and Cancer, Helmholtz Center Munich, Neuherberg, Germany.
- German Center for Diabetes Research, Neuherberg, Germany.
- Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany.
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21
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Ogando J, Sáez ME, Santos J, Nuevo-Tapioles C, Gut M, Esteve-Codina A, Heath S, González-Pérez A, Cuezva JM, Lacalle RA, Mañes S. PD-1 signaling affects cristae morphology and leads to mitochondrial dysfunction in human CD8 + T lymphocytes. J Immunother Cancer 2019; 7:151. [PMID: 31196176 PMCID: PMC6567413 DOI: 10.1186/s40425-019-0628-7] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 05/24/2019] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Binding of the programmed death-1 (PD-1) receptor to its ligands (PD-L1/2) transduces inhibitory signals that promote exhaustion of activated T cells. Blockade of the PD-1 pathway is widely used for cancer treatment, yet the inhibitory signals transduced by PD-1 in T cells remain elusive. METHODS Expression profiles of human CD8+ T cells in resting, activated (CD3 + CD28) and PD-1-stimulated cells (CD3 + CD28 + PD-L1-Fc) conditions were evaluated by RNA-seq. Bioinformatic analyses were used to identify signaling pathways differentially regulated in PD-1-stimulated cells. Metabolic analyses were performed with SeaHorse technology, and mitochondrial ultrastructure was determined by transmission electron microscopy. PD-1-regulated mitochondrial genes were silenced using short-hairpin RNA in primary cells. Blue native gel electrophoresis was used to determine respiratory supercomplex assembly. RESULTS PD-1 engagement in human CD8+ T cells triggers a specific, progressive genetic program different from that found in resting cells. Gene ontology identified metabolic processes, including glycolysis and oxidative phosphorylation (OXPHOS), as the main pathways targeted by PD-1. We observed severe functional and structural alterations in the mitochondria of PD-1-stimulated cells, including a reduction in the number and length of mitochondrial cristae. These cristae alterations were associated with reduced expression of CHCHD3 and CHCHD10, two proteins that form part of the mitochondrial contact site and cristae organizing system (MICOS). Although PD-1-stimulated cells showed severe cristae alterations, assembly of respiratory supercomplexes was unexpectedly greater in these cells than in activated T cells. CHCHD3 silencing in primary CD8+ T cells recapitulated some effects induced by PD-1 stimulation, including reduced mitochondrial polarization and interferon-γ production following T cell activation with anti-CD3 and -CD28 activating antibodies. CONCLUSIONS Our results suggest that mitochondria are the main targets of PD-1 inhibitory activity. PD-1 reprograms CD8+ T cell metabolism for efficient use of fatty acid oxidation; this mitochondrial phenotype might explain the long-lived phenotype of PD-1-engaged T cells.
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Affiliation(s)
- Jesús Ogando
- Department of Immunology and Oncology, Centro Nacional de Biotecnología (CNB/CSIC), Madrid, Spain
| | | | - Javier Santos
- Department of Immunology and Oncology, Centro Nacional de Biotecnología (CNB/CSIC), Madrid, Spain
| | - Cristina Nuevo-Tapioles
- Centro de Biología Molecular-Severo Ochoa (CBMSO/CSIC) and Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER-ISCIII), Universidad Autónoma de Madrid, Madrid, Spain
| | - Marta Gut
- CNAG-CRG, Centre for Genomic Regulation, Barcelona and Institute of Science and Technology (BIST), Barcelona, Spain.,Universitat Pompeu Fabra, Barcelona, Spain
| | - Anna Esteve-Codina
- CNAG-CRG, Centre for Genomic Regulation, Barcelona and Institute of Science and Technology (BIST), Barcelona, Spain
| | - Simon Heath
- CNAG-CRG, Centre for Genomic Regulation, Barcelona and Institute of Science and Technology (BIST), Barcelona, Spain.,Universitat Pompeu Fabra, Barcelona, Spain
| | | | - José M Cuezva
- Centro de Biología Molecular-Severo Ochoa (CBMSO/CSIC) and Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER-ISCIII), Universidad Autónoma de Madrid, Madrid, Spain
| | - Rosa Ana Lacalle
- Department of Immunology and Oncology, Centro Nacional de Biotecnología (CNB/CSIC), Madrid, Spain
| | - Santos Mañes
- Department of Immunology and Oncology, Centro Nacional de Biotecnología (CNB/CSIC), Madrid, Spain.
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22
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Chen P, Zhong J, Ye J, He Y, Liang Z, Cheng Y, Zheng J, Chen H, Chen C. miR-324-5p protects against oxidative stress-induced endothelial progenitor cell injury by targeting Mtfr1. J Cell Physiol 2019; 234:22082-22092. [PMID: 31066044 DOI: 10.1002/jcp.28771] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 03/30/2019] [Accepted: 04/11/2019] [Indexed: 12/22/2022]
Abstract
Endothelial progenitor cells (EPCs) belong to bone marrow-derived myeloid progenitor cells that have strong proliferative ability. Dysregulation of miRNAs after acute myocardial infarction (AMI) can result in EPCs injury, thus we hypothesize that correction of miRNA expression may contribute to the tolerance of EPCs against oxidative stress. The peripheral blood of healthy volunteers and patients with ST-segment elevation myocardial infarction (STEMI) was clinically collected. EPCs derived from peripheral blood were transfected by miR-324-5p mimic and simultaneously handled with hydrogen peroxide (H2 O2 ) to inducing EPCs injury. At 24 hrs after the H2 O2 treatment, cell viability, the uptake capacity on DiI-Ac-LDL, and carrying ability on FITC-UEA-l and multiplication capacity were analyzed. The mechanism process was carefully researched by valued the characteristics of the mitochondrion morphology, membrane potential, ATP levels, and the expressing of apoptosis pathways. Small RNA sequencing indicated that the expression level of miR-324-5p in peripheral blood EPCs of patients with STEMI was significantly lower compared with the healthy volunteers. The Mtfr1 has been confirmed as a targeted gene of miR-324-5p through miRTarBase software and western blot. The miR-324-5p mimic units could be contributed for the improvement of viability, the uptake capacity on DiI-Ac-LDL and carrying ability on FITC-UEA-l and multiplication capacity on oxidative stress-injured EPCs. miR-324-5p could suppress mitochondrial fragmentation, promote membrane potential, and ATP levels, as well as protect against oxidative stress-induced EPCs apoptosis. Our results suggested that miR-324-5p protects against oxidative stress-induced EPCs injury by regulating Mtfr1.
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Affiliation(s)
- Peier Chen
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, The Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Jianfeng Zhong
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, The Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Jianfeng Ye
- People's Hospital of Dongguan City, Dongguan, Guangdong, China
| | - Yuan He
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, The Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Zheng Liang
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, The Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Yu Cheng
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, The Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Jie Zheng
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, The Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Hao Chen
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, The Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Can Chen
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, The Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
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23
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Global phosphoproteomic analysis reveals ARMC10 as an AMPK substrate that regulates mitochondrial dynamics. Nat Commun 2019; 10:104. [PMID: 30631047 PMCID: PMC6328551 DOI: 10.1038/s41467-018-08004-0] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 12/03/2018] [Indexed: 01/06/2023] Open
Abstract
AMP-activated protein kinase (AMPK) is a key regulator of cellular energy homeostasis. Although AMPK has been studied extensively in cellular processes, understanding of its substrates and downstream functional network, and their contributions to cell fate and disease development, remains incomplete. To elucidate the AMPK-dependent signaling pathways, we performed global quantitative phosphoproteomic analysis using wild-type and AMPKα1/α2-double knockout cells and discovered 160 AMPK-dependent phosphorylation sites. Further analysis using an AMPK consensus phosphorylation motif indicated that 32 of these sites are likely direct AMPK phosphorylation sites. We validated one uncharacterized protein, ARMC10, and demonstrated that the S45 site of ARMC10 can be phosphorylated by AMPK both in vitro and in vivo. Moreover, ARMC10 overexpression was sufficient to promote mitochondrial fission, whereas ARMC10 knockout prevented AMPK-mediated mitochondrial fission. These results demonstrate that ARMC10 is an effector of AMPK that participates in dynamic regulation of mitochondrial fission and fusion. AMPK is regulates cellular energy and has been extensively studied, although our knowledge of downstream substrates is incomplete. Here, Chen et al. perform global quantitative analysis for AMPK-dependent sites and validate one hit, ARMC10, as a direct AMPK effector of mitochondrial dynamics.
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24
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Li Y, Liu X. Novel insights into the role of mitochondrial fusion and fission in cardiomyocyte apoptosis induced by ischemia/reperfusion. J Cell Physiol 2018. [PMID: 29528108 DOI: 10.1002/jcp.26522] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
As the main source of energy in the body, mitochondria are highly dynamic organelles, which are constantly going through fusion and fission. The fine balance of mitochondrial fusion and fission plays an important role in maintaining the stability of cardiomyocyte homeostasis. The processes of mitochondrial fusion and fission are very complex, which is mediated by fusion and fission proteins. Disruptions in these processes through controlling fusion and fission proteins affect mitochondrial functions and cardiomyocyte survival. Ischemia/reperfusion (I/R) can regulate the expression and post-translational modifications of fusion and fission proteins thereby inducing the abnormality of mitochondrial fusion and fission and cardiomyocyte apoptosis. Furthermore, intervention with the expression and function of fusion and fission proteins influences on cardiomyocyte apoptosis under I/R conditions. In this review, we focus on the current developments in the effects of mitochondrial fusion and fission on cardiomyocyte functions, the implications for cardiomyocyte apoptosis in response to I/R, and possible mechanisms. And we review their roles as a potential therapeutic target for treating I/R-induced cardiomyocyte injury.
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Affiliation(s)
- YuZhen Li
- Department of Pathophysiology, Institute of Basic Medical Science, PLA General Hospital, Beijing, China
| | - XiuHua Liu
- Department of Pathophysiology, Institute of Basic Medical Science, PLA General Hospital, Beijing, China
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25
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Wang J, Xie Y, Bai X, Wang N, Yu H, Deng Z, Lian M, Yu S, Liu H, Xie W, Wang M. Targeting dual specificity protein kinase TTK attenuates tumorigenesis of glioblastoma. Oncotarget 2017; 9:3081-3088. [PMID: 29423030 PMCID: PMC5790447 DOI: 10.18632/oncotarget.23152] [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: 06/15/2017] [Accepted: 11/21/2017] [Indexed: 12/12/2022] Open
Abstract
Accumulating evidence has proved that glioma stem-like cells (GSCs) are responsible for tumorigenesis, treatment resistance, and subsequent tumor recurrence in glioblastoma (GBM). In this study, we identified dual specificity protein kinase TTK (TTK) as the most up-regulated and differentially expressed kinase encoding genes in GSCs. Functionally, TTK was essential for in vitro clonogenicity and in vivo tumor propagation in GSCs. Clinically, TTK expression was highly enriched in GBM, moreover, was inversely correlated with a poor prognosis in GBM patients. Mechanistically, mitochondrial fission regulator 2 (MTFR2) was identified as one of the most correlated genes to TTK and transcriptionally regulated TTK expression via activation of TTK promoter. Collectively, MTFR2-dependent regulation of TTK plays a key role in maintaining GSCs in GBM and is a potential novel druggable target for GBM.
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Affiliation(s)
- Jia Wang
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Yuchen Xie
- School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Xiaobin Bai
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Ning Wang
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Hai Yu
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China.,School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Zhong Deng
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China.,School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Minxue Lian
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Shuo Yu
- School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Hao Liu
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Wanfu Xie
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Maode Wang
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
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26
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Jiang C, Shen QJ, Wang B, He B, Xiao S, Chen L, Yu T, Ke X, Zhong Q, Fu J, Chen Y, Wang L, Yin F, Zhang D, Ghidan W, Huang X, Cheng Z. Transcriptome analysis of WRKY gene family in Oryza officinalis Wall ex Watt and WRKY genes involved in responses to Xanthomonas oryzae pv. oryzae stress. PLoS One 2017; 12:e0188742. [PMID: 29190793 PMCID: PMC5708796 DOI: 10.1371/journal.pone.0188742] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 11/13/2017] [Indexed: 11/27/2022] Open
Abstract
Oryza officinalis Wall ex Watt, a very important and special wild rice species, shows abundant genetic diversity and disease resistance features, especially high resistance to bacterial blight. The molecular mechanisms of bacterial blight resistance in O. officinalis have not yet been elucidated. The WRKY transcription factor family is one of the largest gene families involved in plant growth, development and stress response. However, little is known about the numbers, structure, molecular phylogenetics, and expression of the WRKY genes under Xanthomonas oryzae pv. oryzae (Xoo) stress in O. officinalis due to lacking of O. officinalis genome. Therefore, based on the RNA-sequencing data of O. officinalis, we performed a comprehensive study of WRKY genes in O. officinalis and identified 89 OoWRKY genes. Then 89 OoWRKY genes were classified into three groups based on the WRKY domains and zinc finger motifs. Phylogenetic analysis strongly supported that the evolution of OoWRKY genes were consistent with previous studies of WRKYs, and subgroup IIc OoWRKY genes were the original ancestors of some group II and group III OoWRKYs. Among the 89 OoWRKY genes, eight OoWRKYs displayed significantly different expression (>2-fold, p<0.01) in the O. officinalis transcriptome under Xoo strains PXO99 and C5 stress 48 h, suggesting these genes might play important role in PXO99 and C5 stress responses in O. officinalis. QRT-PCR analysis and confirmation of eight OoWRKYs expression patterns revealed that they responded strongly to PXO99 and C5 stress 24 h, 48 h, and 72 h, and the trends of these genes displaying marked changes were consistent with the 48 h RNA-sequencing data, demonstrated these genes played important roles in response to biotic stress and might even involved in the bacterial blight resistance. Tissue expression profiles of eight OoWRKY genes revealed that they were highly expressed in root, stem, leaf, and flower, especially in leaf (except OoWRKY71), suggesting these genes might be also important for plant growth and organ development. In this study, we analyzed the WRKY family of transcription factors in O.officinalis. Insight was gained into the classification, evolution, and function of the OoWRKY genes, revealing the putative roles of eight significantly different expression OoWRKYs in Xoo strains PXO99 and C5 stress responses in O.officinalis. This study provided a better understanding of the evolution and functions of O. officinalis WRKY genes, and suggested that manipulating eight significantly different expression OoWRKYs would enhance resistance to bacterial blight.
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Affiliation(s)
- Chunmiao Jiang
- Biotechnology & Genetic Germplasm Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, P.R. China
- School of Life Sciences, Yunnan University, Kunming, Yunnan, P.R. China
| | - Qingxi J. Shen
- School of Life Sciences, University of Nevada, Las Vegas, USA
| | - Bo Wang
- Biotechnology & Genetic Germplasm Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, P.R. China
| | - Bin He
- Jiangxi Science & Technology Normal University, Nanchang, Jiangxi, P.R. China
| | - Suqin Xiao
- Biotechnology & Genetic Germplasm Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, P.R. China
| | - Ling Chen
- Biotechnology & Genetic Germplasm Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, P.R. China
| | - Tengqiong Yu
- Biotechnology & Genetic Germplasm Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, P.R. China
| | - Xue Ke
- Biotechnology & Genetic Germplasm Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, P.R. China
| | - Qiaofang Zhong
- Biotechnology & Genetic Germplasm Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, P.R. China
| | - Jian Fu
- Biotechnology & Genetic Germplasm Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, P.R. China
| | - Yue Chen
- Biotechnology & Genetic Germplasm Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, P.R. China
| | - Lingxian Wang
- Biotechnology & Genetic Germplasm Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, P.R. China
| | - Fuyou Yin
- Biotechnology & Genetic Germplasm Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, P.R. China
| | - Dunyu Zhang
- Biotechnology & Genetic Germplasm Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, P.R. China
| | - Walid Ghidan
- Rice Research & Training Center, Field Crops Research Institute, Agricultural Research Center (ARC), Sakha, Kafr Elsheikh, Egypt
| | - Xingqi Huang
- Biotechnology & Genetic Germplasm Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, P.R. China
- School of Life Sciences, Yunnan University, Kunming, Yunnan, P.R. China
- * E-mail: (XH); (ZC)
| | - Zaiquan Cheng
- Biotechnology & Genetic Germplasm Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, P.R. China
- * E-mail: (XH); (ZC)
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27
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Doiron K, Goyon V, Coyaud E, Rajapakse S, Raught B, McBride HM. The dynamic interacting landscape of MAPL reveals essential functions for SUMOylation in innate immunity. Sci Rep 2017; 7:107. [PMID: 28273895 PMCID: PMC5427825 DOI: 10.1038/s41598-017-00151-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 02/13/2017] [Indexed: 01/05/2023] Open
Abstract
Activation of the innate immune response triggered by dsRNA viruses occurs through the assembly of the Mitochondrial Anti-Viral Signaling (MAVS) complex. Upon recognition of viral dsRNA, the cytosolic receptor RIG-I is activated and recruited to MAVS to activate the immune signaling response. We here demonstrate a strict requirement for a mitochondrial anchored protein ligase, MAPL (also called MUL1) in the signaling events that drive the transcriptional activation of antiviral genes downstream of Sendai virus infection, both in vivo and in vitro. A biotin environment scan of MAPL interacting polypeptides identified a series of proteins specific to Sendai virus infection; including RIG-I, IFIT1, IFIT2, HERC5 and others. Upon infection, RIG-I is SUMOylated in a MAPL-dependent manner, a conjugation step that is required for its activation. Consistent with this, MAPL was not required for signaling downstream of a constitutively activated form of RIG-I. These data highlight a critical role for MAPL and mitochondrial SUMOylation in the early steps of antiviral signaling.
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Affiliation(s)
- Karine Doiron
- Montreal Neurological Institute, McGill University, 3801 University Ave, Montreal, Quebec, H3A 2B4, Canada
| | - Vanessa Goyon
- Montreal Neurological Institute, McGill University, 3801 University Ave, Montreal, Quebec, H3A 2B4, Canada
| | - Etienne Coyaud
- Princess Margaret Cancer Centre, University Health Network, 101 College St., Toronto, ON M5G 1L7, Canada
| | - Sanjeeva Rajapakse
- Montreal Neurological Institute, McGill University, 3801 University Ave, Montreal, Quebec, H3A 2B4, Canada
| | - Brian Raught
- Princess Margaret Cancer Centre, University Health Network, 101 College St., Toronto, ON M5G 1L7, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Heidi M McBride
- Montreal Neurological Institute, McGill University, 3801 University Ave, Montreal, Quebec, H3A 2B4, Canada.
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28
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Bailey J, Shaw A, Fischer R, Ryan BJ, Kessler BM, McCullagh J, Wade-Martins R, Channon KM, Crabtree MJ. A novel role for endothelial tetrahydrobiopterin in mitochondrial redox balance. Free Radic Biol Med 2017; 104:214-225. [PMID: 28104455 PMCID: PMC5338462 DOI: 10.1016/j.freeradbiomed.2017.01.012] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 01/04/2017] [Accepted: 01/06/2017] [Indexed: 02/07/2023]
Abstract
The redox co-factor tetrahydrobiopterin (BH4) regulates nitric oxide (NO) and reactive oxygen species (ROS) production by endothelial NOS (eNOS) and is an important redox-dependent signalling molecule in the endothelium. Loss of endothelial BH4 is observed in cardiovascular disease (CVD) states and results in decreased NO and increased superoxide (O2-) generation via eNOS uncoupling. Genetic mouse models of augmented endothelial BH4 synthesis have shown proof of concept that endothelial BH4 can alter CVD pathogenesis. However, clinical trials of BH4 therapy in vascular disease have been limited by systemic oxidation, highlighting the need to explore the wider roles of BH4 to find novel therapeutic targets. In this study, we aimed to elucidate the effects of BH4 deficiency on mitochondrial function and bioenergetics using targeted knockdown of the BH4 synthetic enzyme, GTP Cyclohydrolase I (GTPCH). Knockdown of GTPCH by >90% led to marked loss of cellular BH4 and a striking induction of O2- generation in the mitochondria of murine endothelial cells. This effect was likewise observed in BH4-depleted fibroblasts devoid of NOS, indicating a novel NOS-independent role for BH4 in mitochondrial redox signalling. Moreover, this BH4-dependent, mitochondria-derived ROS further oxidised mitochondrial BH4, concomitant with changes in the thioredoxin and glutathione antioxidant pathways. These changes were accompanied by a modest increase in mitochondrial size, mildly attenuated basal respiratory function, and marked changes in the mitochondrial proteome and cellular metabolome, including the accumulation of the TCA intermediate succinate. Taken together, these data reveal a novel NOS-independent role for BH4 in the regulation of mitochondrial redox signalling and bioenergetic metabolism.
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Affiliation(s)
- Jade Bailey
- BHF Centre of Research Excellence, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, United Kingdom
| | - Andrew Shaw
- BHF Centre of Research Excellence, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, United Kingdom
| | - Roman Fischer
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Roosevelt Drive, Oxford OX3 7FZ, United Kingdom
| | - Brent J Ryan
- Oxford Parkinson's Disease Centre, Department of Physiology, Anatomy and Genetics, South Parks Road, Oxford OX1 3QX, United Kingdom
| | - Benedikt M Kessler
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Roosevelt Drive, Oxford OX3 7FZ, United Kingdom
| | - James McCullagh
- Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Richard Wade-Martins
- Oxford Parkinson's Disease Centre, Department of Physiology, Anatomy and Genetics, South Parks Road, Oxford OX1 3QX, United Kingdom
| | - Keith M Channon
- BHF Centre of Research Excellence, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, United Kingdom.
| | - Mark J Crabtree
- BHF Centre of Research Excellence, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, United Kingdom
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The Alterations in Mitochondrial DNA Copy Number and Nuclear-Encoded Mitochondrial Genes in Rat Brain Structures after Cocaine Self-Administration. Mol Neurobiol 2016; 54:7460-7470. [PMID: 27819115 PMCID: PMC5622911 DOI: 10.1007/s12035-016-0153-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 09/22/2016] [Indexed: 12/22/2022]
Abstract
The repeated intake of cocaine evokes oxidative stress that is present even during drug withdrawal. Recent studies demonstrate that cocaine-induced oxidative and/or endoplasmic reticulum stress can affect mitochondrial function and dynamics as well as the expression of mitochondrial and nuclear genes. These alterations in mitochondrial function may determine synaptic and behavioral plasticity. Mitochondria and mitochondrial DNA (mtDNA) seem to play an important role in the initiation of drug addiction. We used a microarray approach to investigate the expression patterns of nuclear-encoded genes relevant for mitochondrial functions and quantitative real-time PCR assays to determine the numbers of copies of mtDNA and of mRNAs corresponding to two mitochondrial proteins in the prefrontal cortex and hippocampus of rats during early cocaine abstinence. We found a significant elevation in the copy number of mtDNA and concomitant increased expression of mitochondrial genes. Moreover, microarray analysis revealed changes in the transcription of nuclear genes engaged in mtDNA replication, nucleoid formation, the oxidative phosphorylation pathway, and mitochondrial fission and fusion. Finally, we observed the upregulation of endoplasmic reticulum stress-induced genes. Cocaine self-administration influences the expression of both nuclear and mitochondrial genes as well as mtDNA replication. To determine whether these alterations serve as compensatory mechanisms to help maintain normal level of ATP production, further studies are necessary.
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Xu H, Watanabe KA, Zhang L, Shen QJ. WRKY transcription factor genes in wild rice Oryza nivara. DNA Res 2016; 23:311-23. [PMID: 27345721 PMCID: PMC4991837 DOI: 10.1093/dnares/dsw025] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Accepted: 05/18/2016] [Indexed: 11/26/2022] Open
Abstract
The WRKY transcription factor family is one of the largest gene families involved in plant development and stress response. Although many WRKY genes have been studied in cultivated rice (Oryza sativa), the WRKY genes in the wild rice species Oryza nivara, the direct progenitor of O. sativa, have not been studied. O. nivara shows abundant genetic diversity and elite drought and disease resistance features. Herein, a total of 97 O. nivara WRKY (OnWRKY) genes were identified. RNA-sequencing demonstrates that OnWRKY genes were generally expressed at higher levels in the roots of 30-day-old plants. Bioinformatic analyses suggest that most of OnWRKY genes could be induced by salicylic acid, abscisic acid, and drought. Abundant potential MAPK phosphorylation sites in OnWRKYs suggest that activities of most OnWRKYs can be regulated by phosphorylation. Phylogenetic analyses of OnWRKYs support a novel hypothesis that ancient group IIc OnWRKYs were the original ancestors of only some group IIc and group III WRKYs. The analyses also offer strong support that group IIc OnWRKYs containing the HVE sequence in their zinc finger motifs were derived from group Ia WRKYs. This study provides a solid foundation for the study of the evolution and functions of WRKY genes in O. nivara.
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Affiliation(s)
- Hengjian Xu
- School of Life Sciences, Shandong University of Technology, Zibo 255000, Shandong Province, People's Republic of China School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 89154, USA
| | - Kenneth A Watanabe
- School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 89154, USA
| | - Liyuan Zhang
- School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 89154, USA
| | - Qingxi J Shen
- School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 89154, USA
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31
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Xia CG, Zhang D, Ma C, Zhou J, He S, Su XR. Characterization and comparison of proteomes of albino sea cucumber Apostichopus japonicus (Selenka) by iTRAQ analysis. FISH & SHELLFISH IMMUNOLOGY 2016; 51:229-239. [PMID: 26707782 DOI: 10.1016/j.fsi.2015.12.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Revised: 12/12/2015] [Accepted: 12/14/2015] [Indexed: 06/05/2023]
Abstract
Sea cucumber is a commercially important marine organism in China. Of the different colored varieties sold in China, albino sea cucumber has the greatest appeal among consumers. Identification of factors contributing to albinism in sea cucumber is therefore likely to provide a scientific basis for improving the cultivability of these strains. In this study, two-dimensional liquid chromatography-tandem mass spectrometry coupled with isobaric tags for relative and absolute quantification labeling was used for the first time to quantitatively define the proteome of sea cucumbers and reveal proteomic characteristics unique to albino sea cucumbers. A total of 549 proteins were identified and quantified in albino sea cucumber and the functional annotations of 485 proteins have been exhibited based on COG database. Compared with green sea cucumber, 12 proteins were identified as differentially expressed in the intestine and 16 proteins in the body wall of albino sea cucumber. Among them, 5 proteins were up-regulated in the intestine and 8 proteins were down-regulated in body wall. Gene ontology annotations of these differentially expressed proteins consisted mostly of 'biological process'. The large number of differentially expressed proteins identified here should be highly useful in further elucidating the mechanisms underlying albinism in sea cucumber.
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Affiliation(s)
- Chang-Ge Xia
- School of Marine Sciences, Ningbo University, Zhejiang Province 315211, PR China; Xinlicheng Reservoir Management Bureau in Changchun, Jilin Province 130119, PR China
| | - Dijun Zhang
- School of Marine Sciences, Ningbo University, Zhejiang Province 315211, PR China
| | - Chengnv Ma
- School of Marine Sciences, Ningbo University, Zhejiang Province 315211, PR China
| | - Jun Zhou
- School of Marine Sciences, Ningbo University, Zhejiang Province 315211, PR China
| | - Shan He
- School of Marine Sciences, Ningbo University, Zhejiang Province 315211, PR China
| | - Xiu-Rong Su
- School of Marine Sciences, Ningbo University, Zhejiang Province 315211, PR China.
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32
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An eleven gene molecular signature for extra-capsular spread in oral squamous cell carcinoma serves as a prognosticator of outcome in patients without nodal metastases. Oral Oncol 2015; 51:355-62. [DOI: 10.1016/j.oraloncology.2014.12.012] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 12/01/2014] [Accepted: 12/13/2014] [Indexed: 12/11/2022]
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Finelli MJ, Liu KX, Wu Y, Oliver PL, Davies KE. Oxr1 improves pathogenic cellular features of ALS-associated FUS and TDP-43 mutations. Hum Mol Genet 2015; 24:3529-44. [PMID: 25792726 PMCID: PMC4498158 DOI: 10.1093/hmg/ddv104] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 03/16/2015] [Indexed: 12/12/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease characterized by the loss of motor neuron-like cells. Mutations in the RNA- and DNA-binding proteins, fused in sarcoma (FUS) and transactive response DNA-binding protein 43 kDa (TDP-43), are responsible for 5–10% of familial and 1% of sporadic ALS cases. Importantly, aggregation of misfolded FUS or TDP-43 is also characteristic of several neurodegenerative disorders in addition to ALS, including frontotemporal lobar degeneration. Moreover, splicing deregulation of FUS and TDP-43 target genes as well as mitochondrial abnormalities are associated with disease-causing FUS and TDP-43 mutants. While progress has been made to understand the functions of these proteins, the exact mechanisms by which FUS and TDP-43 cause ALS remain unknown. Recently, we discovered that, in addition to being up-regulated in spinal cords of ALS patients, the novel protein oxidative resistance 1 (Oxr1) protects neurons from oxidative stress-induced apoptosis. To further understand the function of Oxr1, we present here the first interaction study of the protein. We show that Oxr1 binds to Fus and Tdp-43 and that certain ALS-associated mutations in Fus and Tdp-43 affect their Oxr1-binding properties. We further demonstrate that increasing Oxr1 levels in cells expressing specific Fus and Tdp-43 mutants improves the three main cellular features associated with ALS: cytoplasmic mis-localization and aggregation, splicing changes of a mitochondrial gene and mitochondrial defects. Taken together, these findings suggest that OXR1 may have therapeutic benefits for the treatment of ALS and related neurodegenerative disorders with TDP-43 pathology.
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Affiliation(s)
- Mattéa J Finelli
- MRC Functional Genomics Unit, Department of Physiology, Anatomy and Genetics, University of Oxford, Parks Road, Oxford OX1 3PT, UK
| | - Kevin X Liu
- MRC Functional Genomics Unit, Department of Physiology, Anatomy and Genetics, University of Oxford, Parks Road, Oxford OX1 3PT, UK
| | - Yixing Wu
- MRC Functional Genomics Unit, Department of Physiology, Anatomy and Genetics, University of Oxford, Parks Road, Oxford OX1 3PT, UK
| | - Peter L Oliver
- MRC Functional Genomics Unit, Department of Physiology, Anatomy and Genetics, University of Oxford, Parks Road, Oxford OX1 3PT, UK
| | - Kay E Davies
- MRC Functional Genomics Unit, Department of Physiology, Anatomy and Genetics, University of Oxford, Parks Road, Oxford OX1 3PT, UK
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Song K, Kim S, Na JY, Park JH, Kim JK, Kim JH, Kwon J. Rutin attenuates ethanol-induced neurotoxicity in hippocampal neuronal cells by increasing aldehyde dehydrogenase 2. Food Chem Toxicol 2014; 72:228-33. [DOI: 10.1016/j.fct.2014.07.028] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 07/09/2014] [Accepted: 07/21/2014] [Indexed: 11/28/2022]
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35
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Harrill AH, Desmet KD, Wolf KK, Bridges AS, Eaddy JS, Kurtz CL, Hall JE, Paine MF, Tidwell RR, Watkins PB. A mouse diversity panel approach reveals the potential for clinical kidney injury due to DB289 not predicted by classical rodent models. Toxicol Sci 2012; 130:416-26. [PMID: 22940726 PMCID: PMC3498743 DOI: 10.1093/toxsci/kfs238] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
DB289 is the first oral drug shown in clinical trials to have efficacy in treating African trypanosomiasis (African sleeping sickness). Mild liver toxicity was noted but was not treatment limiting. However, development of DB289 was terminated when several treated subjects developed severe kidney injury, a liability not predicted from preclinical testing. We tested the hypothesis that the kidney safety liability of DB289 would be detected in a mouse diversity panel (MDP) comprised of 34 genetically diverse inbred mouse strains. MDP mice received 10 days of oral treatment with DB289 or vehicle and classical renal biomarkers blood urea nitrogen (BUN) and serum creatinine (sCr), as well as urine biomarkers of kidney injury were measured. While BUN and sCr remained within reference ranges, marked elevations were observed for kidney injury molecule-1 (KIM-1) in the urine of sensitive mouse strains. KIM-1 elevations were not always coincident with elevations in alanine aminotransferase (ALT), suggesting that renal injury was not linked to hepatic injury. Genome-wide association analyses of KIM-1 elevations indicated that genes participating in cholesterol and lipid biosynthesis and transport, oxidative stress, and cytokine release may play a role in DB289 renal injury. Taken together, the data resulting from this study highlight the utility of using an MDP to predict clinically relevant toxicities, to identify relevant toxicity biomarkers that may translate into the clinic, and to identify potential mechanisms underlying toxicities. In addition, the sensitive mouse strains identified in this study may be useful in screening next-in-class compounds for renal injury.
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Affiliation(s)
- Alison H Harrill
- The Hamner Institutes for Health Sciences, Hamner-University of North Carolina Institute for Drug Safety Sciences, Durham, North Carolina 27709, USA.
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Motomura S, Horie K, Kitagaki H. Mitochondrial activity of sake brewery yeast affects malic and succinic acid production during alcoholic fermentation. JOURNAL OF THE INSTITUTE OF BREWING 2012. [DOI: 10.1002/jib.7] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- S. Motomura
- Department of Environmental Sciences; Saga University; 1 Honjo-cho; Saga; 840-8502; Japan
| | - K. Horie
- Department of Environmental Sciences; Saga University; 1 Honjo-cho; Saga; 840-8502; Japan
| | - H. Kitagaki
- Department of Environmental Sciences; Saga University; 1 Honjo-cho; Saga; 840-8502; Japan
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