1
|
Sarg NH, Zaher DM, Abu Jayab NN, Mostafa SH, Ismail HH, Omar HA. The interplay of p38 MAPK signaling and mitochondrial metabolism, a dynamic target in cancer and pathological contexts. Biochem Pharmacol 2024; 225:116307. [PMID: 38797269 DOI: 10.1016/j.bcp.2024.116307] [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: 01/20/2024] [Revised: 05/08/2024] [Accepted: 05/21/2024] [Indexed: 05/29/2024]
Abstract
Mitochondria play a crucial role in cellular metabolism and bioenergetics, orchestrating various cellular processes, including energy production, metabolism, adaptation to stress, and redox balance. Besides, mitochondria regulate cellular metabolic homeostasis through coordination with multiple signaling pathways. Importantly, the p38 mitogen-activated protein kinase (MAPK) signaling pathway is a key player in the intricate communication with mitochondria, influencing various functions. This review explores the multifaced interaction between the mitochondria and p38 MAPK signaling and the consequent impact on metabolic alterations. Overall, the p38 MAPK pathway governs the activities of key mitochondrial proteins, which are involved in mitochondrial biogenesis, oxidative phosphorylation, thermogenesis, and iron homeostasis. Additionally, p38 MAPK contributes to the regulation of mitochondrial responses to oxidative stress and apoptosis induced by cancer therapies or natural substances by coordinating with other pathways responsible for energy homeostasis. Therefore, dysregulation of these interconnected pathways can lead to various pathologies characterized by aberrant metabolism. Consequently, gaining a deeper understanding of the interaction between mitochondria and the p38 MAPK pathway and their implications presents exciting forecasts for novel therapeutic interventions in cancer and other disorders characterized by metabolic dysregulation.
Collapse
Affiliation(s)
- Nadin H Sarg
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates; College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Dana M Zaher
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates; College of Medicine, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Nour N Abu Jayab
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates; College of Medicine, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Salma H Mostafa
- College of Medicine, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Hussein H Ismail
- College of Medicine, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Hany A Omar
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates; College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates.
| |
Collapse
|
2
|
Guo Z, Zhang H, Huang T, Liu C. CCN3/NOV inhibition attenuates oxidative stress-induced apoptosis of mouse neural stem/progenitor cells by blocking the activation of p38 MAPK: An in vitro study. Brain Res 2024; 1827:148756. [PMID: 38199307 DOI: 10.1016/j.brainres.2024.148756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/20/2023] [Accepted: 01/03/2024] [Indexed: 01/12/2024]
Abstract
Neural stem/progenitor cells (NSPCs) hold immense promise in clinical applications, yet the harsh conditions resulting from central nervous system (CNS) injuries, particularly oxidative stress, lead to the demise of both native and transplanted NSPCs. Cellular communication network factor 3 (CCN3) exhibits a protective effect against oxidative stress in various cell types. This study investigates the impact of CCN3 on NSPCs apoptosis induced by oxidative stress. To establish models of primary cultured mouse NSPCs under oxidative stress, we exposed them to 50 μM H2O2 for 4 h. Remarkably, pre-exposing CCN3 exacerbated the H2O2-induced decline in cell viability in a concentration-dependent manner. However, employing gene-targeted siRNA to inhibit CCN3 protected NSPCs against H2O2-induced cell death. Conversely, CCN3 replenishment reversed this protective effect, as evidenced by TUNEL staining, the ratio of Cleaved-caspase-3 to Pro-caspase-3, and Bcl-2/Bax. Further investigations revealed that CCN3 pretreatment increased the phosphorylation level of p38 MAPK, while silencing CCN3 diminished p38 MAPK activation. Ultimately, the impact of changes in CCN3 protein expression on H2O2-induced apoptosis was nullified using anisomycin (a p38 activator) and SB 203580 (a p38 inhibitor). Our findings suggest that CCN3 inhibition prevents H2O2-induced cell death in cultured mouse NSPCs via the p38 pathway. These discoveries may contribute to the development of strategies aimed at enhancing the survival of both endogenous and transplanted NSPCs following CNS oxidative stress insults.
Collapse
Affiliation(s)
- Zhenyu Guo
- Department of Neurosurgery, The 2nd Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Hanyue Zhang
- Institute of Neurobiology, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Tingqin Huang
- Department of Neurosurgery, The 2nd Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Chongxiao Liu
- Department of Neurosurgery, The 2nd Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.
| |
Collapse
|
3
|
Wagner A, Schosserer M. The epitranscriptome in ageing and stress resistance: A systematic review. Ageing Res Rev 2022; 81:101700. [PMID: 35908668 DOI: 10.1016/j.arr.2022.101700] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 07/15/2022] [Accepted: 07/25/2022] [Indexed: 01/31/2023]
Abstract
Modifications of RNA, collectively called the "epitranscriptome", might provide novel biomarkers and innovative targets for interventions in geroscience but are just beginning to be studied in the context of ageing and stress resistance. RNA modifications modulate gene expression by affecting translation initiation and speed, miRNA binding, RNA stability, and RNA degradation. Nonetheless, the precise underlying molecular mechanisms and physiological consequences of most alterations of the epitranscriptome are still only poorly understood. We here systematically review different types of modifications of rRNA, tRNA and mRNA, the methodology to analyze them, current challenges in the field, and human disease associations. Furthermore, we compiled evidence for a connection between individual enzymes, which install RNA modifications, and lifespan in yeast, worm and fly. We also included resistance to different stressors and competitive fitness as search criteria for genes potentially relevant to ageing. Promising candidates identified by this approach include RCM1/NSUN5, RRP8, and F33A8.4/ZCCHC4 that introduce base methylations in rRNA, the methyltransferases DNMT2 and TRM9/ALKBH8, as well as factors involved in the thiolation or A to I editing in tRNA, and finally the m6A machinery for mRNA.
Collapse
Affiliation(s)
- Anja Wagner
- Institute of Molecular Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Markus Schosserer
- Institute of Molecular Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria; Institute of Medical Genetics, Center for Pathobiochemistry and Genetics, Medical University of Vienna, Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria.
| |
Collapse
|
4
|
Giannios P, Casanova J. Systemic and local effect of the Drosophila headcase gene and its role in stress protection of Adult Progenitor Cells. PLoS Genet 2021; 17:e1009362. [PMID: 33556132 PMCID: PMC7895379 DOI: 10.1371/journal.pgen.1009362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 02/19/2021] [Accepted: 01/13/2021] [Indexed: 12/17/2022] Open
Abstract
During the development of a holometabolous insect such as Drosophila, specific group of cells in the larva survive during metamorphosis, unlike the other larval cells, and finally give rise to the differentiated adult structures. These cells, also known as Adult Progenitor Cells (APCs), maintain their multipotent capacity, differentially respond to hormonal and nutritional signals, survive the intrinsic and environmental stress and respond to the final differentiation cues. However, not much is known about the specific molecular mechanisms that account for their unique characteristics. Here we show that a specific Drosophila APC gene, headcase (hdc), has a dual role in the normal development of these cells. It acts at a systemic level by controlling the hormone ecdysone in the prothoracic gland and at the same time it acts locally as a tissue growth suppressor in the APC clusters, where it modulates the activity of the TOR pathway and promotes their survival by contributing in the regulation of the Unfolded Protein Response. We also show that hdc provides protection against stress in the APCs and that its ectopic expression in cells that do not usually express hdc can confer these cells with an additional stress protection. Hdc is the founding member of a group of homolog proteins identified from C. elegans to humans, where has been found associated with cancer progression. The finding that the Drosophila hdc is specifically expressed in progenitor cells and that it provides protection against stress opens up a new hypothesis to be explored regarding the role of the human Heca and its contribution to carcinogenesis.
Collapse
Affiliation(s)
- Panagiotis Giannios
- Institut de Biologia Molecular de Barcelona (CSIC), Barcelona, Catalonia, Spain
- Institut de Recerca Biomèdica de Barcelona, (IRB Barcelona), The Barcelona Institute of Science and Technology (BIST), Barcelona, Catalonia, Spain
| | - Jordi Casanova
- Institut de Biologia Molecular de Barcelona (CSIC), Barcelona, Catalonia, Spain
- Institut de Recerca Biomèdica de Barcelona, (IRB Barcelona), The Barcelona Institute of Science and Technology (BIST), Barcelona, Catalonia, Spain
| |
Collapse
|
5
|
Stein BD, Calzolari D, Hellberg K, Hu YS, He L, Hung CM, Toyama EQ, Ross DS, Lillemeier BF, Cantley LC, Yates JR, Shaw RJ. Quantitative In Vivo Proteomics of Metformin Response in Liver Reveals AMPK-Dependent and -Independent Signaling Networks. Cell Rep 2020; 29:3331-3348.e7. [PMID: 31801093 DOI: 10.1016/j.celrep.2019.10.117] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 08/20/2019] [Accepted: 10/28/2019] [Indexed: 12/25/2022] Open
Abstract
Metformin is the front-line treatment for type 2 diabetes worldwide. It acts via effects on glucose and lipid metabolism in metabolic tissues, leading to enhanced insulin sensitivity. Despite significant effort, the molecular basis for metformin response remains poorly understood, with a limited number of specific biochemical pathways studied to date. To broaden our understanding of hepatic metformin response, we combine phospho-protein enrichment in tissue from genetically engineered mice with a quantitative proteomics platform to enable the discovery and quantification of basophilic kinase substrates in vivo. We define proteins whose binding to 14-3-3 are acutely regulated by metformin treatment and/or loss of the serine/threonine kinase, LKB1. Inducible binding of 250 proteins following metformin treatment is observed, 44% of which proteins bind in a manner requiring LKB1. Beyond AMPK, metformin activates protein kinase D and MAPKAPK2 in an LKB1-independent manner, revealing additional kinases that may mediate aspects of metformin response. Deeper analysis uncovered substrates of AMPK in endocytosis and calcium homeostasis.
Collapse
Affiliation(s)
- Benjamin D Stein
- Molecular and Cell Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA; Department of Molecular Medicine and Neurobiology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA; Meyer Cancer Center, Department of Medicine, Weill Cornell Medical College, New York, NY 10065, USA
| | - Diego Calzolari
- Department of Molecular Medicine and Neurobiology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Kristina Hellberg
- Molecular and Cell Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Ying S Hu
- Nomis Center for Immunobiology and Microbial Pathogenesis, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Lin He
- Department of Molecular Medicine and Neurobiology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Chien-Min Hung
- Molecular and Cell Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Erin Q Toyama
- Molecular and Cell Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Debbie S Ross
- Molecular and Cell Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Björn F Lillemeier
- Nomis Center for Immunobiology and Microbial Pathogenesis, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Lewis C Cantley
- Meyer Cancer Center, Department of Medicine, Weill Cornell Medical College, New York, NY 10065, USA
| | - John R Yates
- Department of Molecular Medicine and Neurobiology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
| | - Reuben J Shaw
- Molecular and Cell Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA.
| |
Collapse
|
6
|
MKK3 modulates JNK-dependent cell migration and invasion. Cell Death Dis 2019; 10:149. [PMID: 30770795 PMCID: PMC6377636 DOI: 10.1038/s41419-019-1350-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 12/19/2018] [Accepted: 01/07/2019] [Indexed: 01/02/2023]
Abstract
The c-Jun N-terminal kinase (JNK) pathway plays essential roles in regulating a variety of physiological processes including cell migration and invasion. To identify critical factors that regulate JNK-dependent cell migration, we carried out a genetic screen in Drosophila based on the loss-of-cell polarity-triggered cell migration in the wing epithelia, and identified MKK3 licorne (lic) as an essential regulator of JNK-mediated cell migration and invasion. We found that loss of lic suppressed ptc > scrib-IR or ptc > Egr triggered cell migration in the wing epithelia, and Rasv12/lgl−/− induced tumor invasion in the eye discs. In addition, ectopic expression of Lic is sufficient to induce JNK-mediated but p38-independent cell migration, and cooperate with oncogenic Ras to promote tumor invasion. Consistently, Lic is able to activate JNK signaling by phosphorylating JNK, which up-regulates the matrix metalloproteinase MMP1 and integrin, characteristics of epithelial–mesenchymal transition (EMT). Moreover, lic is required for physiological JNK-mediate cell migration in thorax development. Finally, expression of human MKK3 in Drosophila is able to initiate JNK-mediated cell migration, cooperates with oncogenic Ras to trigger tumor invasion, and rescue loss-of-lic induced thorax closure defect. As previous studies suggest that MKK3 specifically phosphorylates and activates p38MAPK, our data provide the first in vivo evidence that MKK3 regulates JNK-dependent cell migration and invasion, a process evolutionarily conserved from flies to human.
Collapse
|
7
|
Mendoza-Ortíz MA, Murillo-Maldonado JM, Riesgo-Escovar JR. aaquetzalli is required for epithelial cell polarity and neural tissue formation in Drosophila. PeerJ 2018; 6:e5042. [PMID: 29942698 PMCID: PMC6015755 DOI: 10.7717/peerj.5042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 05/31/2018] [Indexed: 01/30/2023] Open
Abstract
Morphogenetic movements during embryogenesis require dynamic changes in epithelial cell polarity and cytoskeletal reorganization. Such changes involve, among others, rearrangements of cell-cell contacts and protein traffic. In Drosophila melanogaster, neuroblast delamination during early neurogenesis is a well-characterized process requiring a polarized neuroepithelium, regulated by the Notch signaling pathway. Maintenance of epithelial cell polarity ensues proper Notch pathway activation during neurogenesis. We characterize here aaquetzalli (aqz), a gene whose mutations affect cell polarity and nervous system specification. The aqz locus encodes a protein that harbors a domain with significant homology to a proline-rich conserved domain of nuclear receptor co-activators. aqz expression occurs at all stages of the fly life cycle, and is dynamic. aqz mutants are lethal, showing a disruption of cell polarity during embryonic ventral neuroepithelium differentiation resulting in loss of epithelial integrity and mislocalization of membrane proteins (shown by mislocalization of Crumbs, DE-Cadherin, and Delta). As a consequence, aqz mutant embryos with compromised apical-basal cell polarity develop spotty changes of neuronal and epithelial numbers of cells.
Collapse
Affiliation(s)
- Miguel A Mendoza-Ortíz
- Developmental Neurobiology and Neurophysiology, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Querétaro, México
| | - Juan M Murillo-Maldonado
- Developmental Neurobiology and Neurophysiology, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Querétaro, México
| | - Juan R Riesgo-Escovar
- Developmental Neurobiology and Neurophysiology, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Querétaro, México
| |
Collapse
|
8
|
Cotticelli MG, Xia S, Kaur A, Lin D, Wang Y, Ruff E, Tobias JW, Wilson RB. Identification of p38 MAPK as a novel therapeutic target for Friedreich's ataxia. Sci Rep 2018; 8:5007. [PMID: 29568068 PMCID: PMC5864720 DOI: 10.1038/s41598-018-23168-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 03/07/2018] [Indexed: 01/28/2023] Open
Abstract
Friedreich ataxia (FRDA) is an autosomal recessive neuro- and cardio-degenerative disorder caused by decreased expression of frataxin, a protein that localizes to mitochondria and is critical for iron-sulfur-cluster (ISC) assembly. There are no proven effective treatments for FRDA. We previously screened a random shRNA library and identified a synthetic shRNA (gFA11) that reverses the growth defect of FRDA cells in culture. We now report that gFA11 decreases cytokine secretion in primary FRDA fibroblasts and reverts other changes associated with cell senescence. The gene-expression profile induced by gFA11 is remarkably similar to the gene-expression profile induced by the p38 MAPK inhibitor SB203580. We found that p38 phosphorylation, indicating activation of the p38 pathway, is higher in FRDA cells than in normal control cells, and that siRNA knockdown of frataxin in normal fibroblasts also increases p38 phosphorylation. Treatment of FRDA cells with p38 inhibitors recapitulates the reversal of the slow-growth phenotype induced by clone gFA11. These data highlight the involvement of the p38 MAPK pathway in the pathogenesis of FRDA and the potential use of p38 inhibitors as a treatment for FRDA.
Collapse
Affiliation(s)
- M Grazia Cotticelli
- Department of Pathology and Laboratory Medicine, Children's Hospital Philadelphia, Philadelphia, PA, USA
- The Penn Medicine/CHOP Center of Excellence for Friedreich's Ataxia Research, Philadelphia, USA
| | - Shujuan Xia
- Department of Pathology and Laboratory Medicine, Children's Hospital Philadelphia, Philadelphia, PA, USA
- The Penn Medicine/CHOP Center of Excellence for Friedreich's Ataxia Research, Philadelphia, USA
| | - Avinash Kaur
- Marian University College of Osteopathic Medicine, Indianapolis, USA
| | - Daniel Lin
- Department of Pathology and Laboratory Medicine, Children's Hospital Philadelphia, Philadelphia, PA, USA
- The Penn Medicine/CHOP Center of Excellence for Friedreich's Ataxia Research, Philadelphia, USA
| | - Yongping Wang
- Department of Pathology and Laboratory Medicine, Children's Hospital Philadelphia, Philadelphia, PA, USA
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, USA
| | - Eric Ruff
- State University of New York Downstate College of Medicine, New York, USA
| | - John W Tobias
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, USA
| | - Robert B Wilson
- Department of Pathology and Laboratory Medicine, Children's Hospital Philadelphia, Philadelphia, PA, USA.
- The Penn Medicine/CHOP Center of Excellence for Friedreich's Ataxia Research, Philadelphia, USA.
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, USA.
| |
Collapse
|
9
|
Zhou J, Edgar BA, Boutros M. ATF3 acts as a rheostat to control JNK signalling during intestinal regeneration. Nat Commun 2017; 8:14289. [PMID: 28272390 PMCID: PMC5344978 DOI: 10.1038/ncomms14289] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 12/15/2016] [Indexed: 12/16/2022] Open
Abstract
Epithelial barrier function is maintained by coordination of cell proliferation and cell loss, whereas barrier dysfunction can lead to disease and organismal death. JNK signalling is a conserved stress signalling pathway activated by bacterial infection and tissue damage, often leading to apoptotic cell death and compensatory cell proliferation. Here we show that the stress inducible transcription factor ATF3 restricts JNK activity in the Drosophila midgut. ATF3 regulates JNK-dependent apoptosis and regeneration through the transcriptional regulation of the JNK antagonist, Raw. Enterocyte-specific ATF3 inactivation increases JNK activity and sensitivity to infection, a phenotype that can be rescued by Raw overexpression or JNK suppression. ATF3 depletion enhances intestinal regeneration triggered by infection, but does not compensate for the loss of enterocytes and ATF3-depleted flies succumb to infection due to intestinal barrier dysfunction. In sum, we provide a mechanism to explain how an ATF3-Raw module controls JNK signalling to maintain normal intestinal barrier function during acute infection. Stress response JNK signalling is important for cell death-induced regeneration. Here the authors show in adult Drosophila enterocytes that ATF3 regulates the expression of Raw, a JNK antagonist, to control intestinal regeneration and barrier function in response to infection.
Collapse
Affiliation(s)
- Jun Zhou
- German Cancer Research Center (DKFZ), Division Signaling and Functional Genomics and Heidelberg University, Department for Cell and Molecular Biology, Medical Faculty Mannheim, Im Neuenheimer Feld 580, 69120 Heidelberg, Germany
| | - Bruce A Edgar
- German Cancer Research Center (DKFZ)-Center for Molecular Biology Heidelberg (ZMBH) Alliance, 69120 Heidelberg, Germany
| | - Michael Boutros
- German Cancer Research Center (DKFZ), Division Signaling and Functional Genomics and Heidelberg University, Department for Cell and Molecular Biology, Medical Faculty Mannheim, Im Neuenheimer Feld 580, 69120 Heidelberg, Germany
| |
Collapse
|
10
|
A Central Role for Phosphorylated p38α in Linking Proteasome Inhibition-Induced Apoptosis and Autophagy. Mol Neurobiol 2016; 54:7597-7609. [PMID: 27832521 DOI: 10.1007/s12035-016-0260-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 10/25/2016] [Indexed: 12/29/2022]
Abstract
Autophagy and the ubiquitin proteasome system (UPS), as two major protein degradation pathways, coordinate with each other in regulating programmed cell death. Autophagy can compensate for the UPS impairment-induced cell dysfunction and apoptosis. However, it is not clear how cells maintain the delicate balance between UPS-related apoptosis and autophagy. Here, we showed that proteasome inhibition-mediated UPS impairment can activate the phosphorylated p38α (p-p38α)-dependent apoptotic pathway and autophagy pathway in both neuroblastoma cell line N2a and primary cortical neuronal cells. Multiple indices were utilized for the autophagy detection including LC3II transition, acidic vesicle formation, lysosomal accumulation, and p62 reduction. Blockade of autophagy flux with autophagy inhibitor 3-methyladenine or bafilomycin A1 resulted in further phosphorylation of p38α, polyubiquitinated protein aggregation, and greater apoptotic cell death. On the contrary, enhancement of autophagy by rapamycin attenuated the cell loss by lowering p-p38α level and degrading protein aggregates, indicating a protective role of autophagy in cell stress and apoptosis. Moreover, de-activation of p38α with pharmaceutical p38α inhibitor BIRB796 greatly increased autophagy activation, reduced protein aggregates, and attenuated cell loss, suggesting a bidirectional regulation between p-p38α and autophagy. In addition, manipulation of p-p38α by BIRB796 or p38α knockdown decreased the phosphorylation of key components of the mammalian target of rapamycin (mTOR)-dependent pathway, indicating that the mTOR pathway mediates the p-p38α regulation on autophagy. Overall, our data emphasize p-p38α as a key mediator in the antagonistic interaction between apoptosis and autophagy in response to UPS impairment. Centering p-p38α as a potential regulatory target may provide a dual advantage of proteostasis maintenance and cell survival for simultaneous inhibition of apoptosis and activation of autophagy.
Collapse
|
11
|
Huang D, Li X, Sun L, Huang P, Ying H, Wang H, Wu J, Song H. Regulation of Hippo signalling by p38 signalling. J Mol Cell Biol 2016; 8:328-37. [PMID: 27402810 PMCID: PMC4991669 DOI: 10.1093/jmcb/mjw036] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 05/05/2016] [Indexed: 11/17/2022] Open
Abstract
The Hippo signalling pathway has a crucial role in growth control during development, and its dysregulation contributes to tumorigenesis. Recent studies uncover multiple upstream regulatory inputs into Hippo signalling, which affects phosphorylation of the transcriptional coactivator Yki/YAP/TAZ by Wts/Lats. Here we identify the p38 mitogen-activated protein kinase (MAPK) pathway as a new upstream branch of the Hippo pathway. In Drosophila, overexpression of MAPKK gene licorne (lic), or MAPKKK gene Mekk1, promotes Yki activity and induces Hippo target gene expression. Loss-of-function studies show that lic regulates Hippo signalling in ovary follicle cells and in the wing disc. Epistasis analysis indicates that Mekk1 and lic affect Hippo signalling via p38b and wts. We further demonstrate that the Mekk1-Lic-p38b cascade inhibits Hippo signalling by promoting F-actin accumulation and Jub phosphorylation. In addition, p38 signalling modulates actin filaments and Hippo signalling in parallel to small GTPases Ras, Rac1, and Rho1. Lastly, we show that p38 signalling regulates Hippo signalling in mammalian cell lines. The Lic homologue MKK3 promotes nuclear localization of YAP via the actin cytoskeleton. Upregulation or downregulation of the p38 pathway regulates YAP-mediated transcription. Our work thus reveals a conserved crosstalk between the p38 MAPK pathway and the Hippo pathway in growth regulation.
Collapse
Affiliation(s)
- Dashun Huang
- Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science & Technology of China, 96 Jin Zhai Road, Hefei 230031, China Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue Yang Road, Shanghai 200031, China Key Laboratory of Food Safety Risk Assessment, Ministry of Health, 37 Guang Qu Road, Beijing 100021, China
| | - Xiaojiao Li
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue Yang Road, Shanghai 200031, China Key Laboratory of Food Safety Risk Assessment, Ministry of Health, 37 Guang Qu Road, Beijing 100021, China
| | - Li Sun
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue Yang Road, Shanghai 200031, China Key Laboratory of Food Safety Risk Assessment, Ministry of Health, 37 Guang Qu Road, Beijing 100021, China
| | - Ping Huang
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue Yang Road, Shanghai 200031, China Key Laboratory of Food Safety Risk Assessment, Ministry of Health, 37 Guang Qu Road, Beijing 100021, China
| | - Hao Ying
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue Yang Road, Shanghai 200031, China Key Laboratory of Food Safety Risk Assessment, Ministry of Health, 37 Guang Qu Road, Beijing 100021, China
| | - Hui Wang
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue Yang Road, Shanghai 200031, China Key Laboratory of Food Safety Risk Assessment, Ministry of Health, 37 Guang Qu Road, Beijing 100021, China
| | - Jiarui Wu
- Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science & Technology of China, 96 Jin Zhai Road, Hefei 230031, China
| | - Haiyun Song
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue Yang Road, Shanghai 200031, China Key Laboratory of Food Safety Risk Assessment, Ministry of Health, 37 Guang Qu Road, Beijing 100021, China
| |
Collapse
|
12
|
Nguyen Ho-Bouldoires TH, Clapéron A, Mergey M, Wendum D, Desbois-Mouthon C, Tahraoui S, Fartoux L, Chettouh H, Merabtene F, Scatton O, Gaestel M, Praz F, Housset C, Fouassier L. Mitogen-activated protein kinase-activated protein kinase 2 mediates resistance to hydrogen peroxide-induced oxidative stress in human hepatobiliary cancer cells. Free Radic Biol Med 2015; 89:34-46. [PMID: 26169728 DOI: 10.1016/j.freeradbiomed.2015.07.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 06/25/2015] [Accepted: 07/08/2015] [Indexed: 12/21/2022]
Abstract
The development and progression of liver cancer are characterized by increased levels of reactive oxygen species (ROS). ROS-induced oxidative stress impairs cell proliferation and ultimately leads to cell death. Although liver cancer cells are especially resistant to oxidative stress, mechanisms of such resistance remain understudied. We identified the MAPK-activated protein kinase 2 (MK2)/heat shock protein 27 (Hsp27) signaling pathway mediating defenses against oxidative stress. In addition to MK2 and Hsp27 overexpression in primary liver tumors compared to adjacent nontumorous tissues, the MK2/Hsp27 pathway is activated by hydrogen peroxide-induced oxidative stress in hepatobiliary cancer cells. MK2 inactivation or inhibition of MK2 or Hsp27 expression increases caspase-3 and PARP cleavage and DNA breaks and therefore cell death. Interestingly, MK2/Hsp27 inhibition decreases antioxidant defenses such as heme oxygenase 1 through downregulation of the transcription factor nuclear factor erythroid-derived 2-like 2. Moreover, MK2/Hsp27 inhibition decreases both phosphorylation of epidermal growth factor receptor (EGFR) and expression of its ligand, heparin-binding EGF-like growth factor. A new identified partner of MK2, the scaffold PDZ protein EBP50, could facilitate these effects through MK2/Hsp27 pathway regulation. These findings demonstrate that the MK2/Hsp27 pathway actively participates in resistance to oxidative stress and may contribute to liver cancer progression.
Collapse
Affiliation(s)
- Thanh Huong Nguyen Ho-Bouldoires
- INSERM UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France
| | - Audrey Clapéron
- INSERM UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France
| | - Martine Mergey
- INSERM UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France
| | - Dominique Wendum
- INSERM UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Service d'Anatomie et Cytologie Pathologiques, AP-HP, Hôpital Saint-Antoine, F-75012 Paris, France
| | - Christèle Desbois-Mouthon
- INSERM UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France
| | - Sylvana Tahraoui
- INSERM UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France
| | - Laetitia Fartoux
- INSERM UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Service d'Hépatologie, AP-HP, Hôpital Saint-Antoine, F-75012 Paris, France
| | - Hamza Chettouh
- INSERM UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France
| | - Fatiha Merabtene
- INSERM UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France
| | - Olivier Scatton
- INSERM UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Service de Chirurgie Hépato-Biliaire et Transplantation Hépatique, AP-HP, Hôpital Saint-Antoine, F-75012 Paris, France
| | - Matthias Gaestel
- Institute of Physiological Chemistry, Hannover Medical School, D-30625 Hannover, Germany
| | - Françoise Praz
- INSERM UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France
| | - Chantal Housset
- INSERM UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Service d'Hépatologie, AP-HP, Hôpital Saint-Antoine, F-75012 Paris, France
| | - Laura Fouassier
- INSERM UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, Centre de Recherche Saint-Antoine, F-75012 Paris, France.
| |
Collapse
|