1
|
Liu C, Xu Q, Ma J, Wang S, Li J, Mao X. Ultrasonic cavitation induced Vibrio parahaemolyticus entering an apoptosis-like death process through SOS response. ULTRASONICS SONOCHEMISTRY 2024; 103:106771. [PMID: 38245921 PMCID: PMC10830854 DOI: 10.1016/j.ultsonch.2024.106771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 12/25/2023] [Accepted: 01/14/2024] [Indexed: 01/23/2024]
Abstract
As an effective non-thermal sterilization method, ultrasound remains at the level of passive bacterial death despite the initial understanding of its sterilization mechanism. Here, we present the perspective that bacteria can choose to actively enter an apoptosis-like death state in response to external ultrasonic stress. In this study, Vibrio parahaemolyticus exhibited apoptotic markers such as phosphatidylserine ectropion and activated caspases when subjected to ultrasound stress. Additionally, the accumulation of reactive oxygen species (ROS) and enhanced calcium signaling were observed. Further transcriptomic analysis was conducted to investigate the regulatory mechanism of the SOS response in Vibrio parahaemolyticus during an apoptosis-like state. The results showed that the genes encoding the citrate cycle were down-regulated in Vibrio parahaemolyticus cells adapted to ultrasonic stress, leading to an apoptosis-like state and a decrease in production capacity and ability to catabolize carbon dioxide. Furthermore, the level of oxidized glutathione increased, suggesting that the bacteria were engaged in various anti-oxidative stress responses, ultimately leading to apoptosis. Moreover, the ultrasound field activated the regulatory factor CsrA, which facilitates stress survival as cells transition from rapid growth to an apoptotic state through a stringent response and catabolic inhibition system. Parallel reaction monitoring (PRM) revealed that the expression of certain key SOS proteins in Vibrio parahaemolyticus was up-regulated following ultrasound treatment, resulting in a gradual adaptation of the cells to external stress and ultimately leading to active cell death. In conclusion, the biological lethal effect of ultrasound treatment is not solely a mechanical cell necrosis process as traditionally viewed, but also a programmed cell death process regulated by cellular adaptation. This enriched the biological effect pathway of ultrasound sterilization.
Collapse
Affiliation(s)
- Chunhui Liu
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China
| | - Qi Xu
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China
| | - Jiaqi Ma
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China
| | - Sai Wang
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China
| | - Jiao Li
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China.
| | - Xiangzhao Mao
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China; Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, PR China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China
| |
Collapse
|
2
|
Kietz C, Meinander A. Drosophila caspases as guardians of host-microbe interactions. Cell Death Differ 2023; 30:227-236. [PMID: 35810247 PMCID: PMC9950452 DOI: 10.1038/s41418-022-01038-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 06/22/2022] [Accepted: 06/22/2022] [Indexed: 11/09/2022] Open
Abstract
An intact cell death machinery is not only crucial for successful embryonic development and tissue homeostasis, but participates also in the defence against pathogens and contributes to a balanced immune response. Centrally involved in the regulation of both cell death and inflammatory immune responses is the evolutionarily conserved family of cysteine proteases named caspases. The Drosophila melanogaster genome encodes for seven caspases, several of which display dual functions, participating in apoptotic signalling and beyond. Among the Drosophila caspases, the caspase-8 homologue Dredd has a well-characterised role in inflammatory signalling activated by bacterial infections, and functions as a driver of NF-κB-mediated immune responses. Regarding the other Drosophila caspases, studies focusing on tissue-specific immune signalling and host-microbe interactions have recently revealed immunoregulatory functions of the initiator caspase Dronc and the effector caspase Drice. The aim of this review is to give an overview of the signalling cascades involved in the Drosophila humoral innate immune response against pathogens and of their caspase-mediated regulation. Furthermore, the apoptotic role of caspases during antibacterial and antiviral immune activation will be discussed.
Collapse
Affiliation(s)
- Christa Kietz
- Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, BioCity, Turku, Finland
| | - Annika Meinander
- Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, BioCity, Turku, Finland.
- InFLAMES Research Flagship Center, Åbo Akademi University, Turku, Finland.
| |
Collapse
|
3
|
Yang T, Guo R, Ofengeim D, Hwang JY, Zukin RS, Chen J, Zhang F. Molecular and Cellular Mechanisms of Ischemia-Induced Neuronal Death. Stroke 2022. [DOI: 10.1016/b978-0-323-69424-7.00005-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
4
|
Akter T, Rahman MA, Moni A, Apu MAI, Fariha A, Hannan MA, Uddin MJ. Prospects for Protective Potential of Moringa oleifera against Kidney Diseases. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10122818. [PMID: 34961289 PMCID: PMC8706354 DOI: 10.3390/plants10122818] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
Kidney diseases are regarded as one of the major public health issues in the world. The objectives of this study were: (i) to investigate the causative factors involved in kidney disease and the therapeutic aspects of Moringa oleifera, as well as (ii) the effectiveness of M. oleifera in the anti-inflammation and antioxidant processes of the kidney while minimizing all potential side effects. In addition, we proposed a hypothesis to improve M. oleifera based drug development. This study was updated by searching the key words M. oleifera on kidney diseases and M. oleifera on oxidative stress, inflammation, and fibrosis in online research databases such as PubMed and Google Scholar. The following validation checking and scrutiny analysis of the recently published articles were used to explore this study. The recent existing research has found that M. oleifera has a plethora of health benefits. Individual medicinal properties of M. oleifera leaf extract, seed powder, stem extract, and the whole extract (ethanol/methanol) can up-increase the activity of antioxidant enzymes like superoxide dismutase (SOD), catalase (CAT), and glutathione (GSH), while decreasing the activity of inflammatory cytokines such as TNF-α, IL-1β, IL-6, and COX-2. In our study, we have investigated the properties of this plant against kidney diseases based on existing knowledge with an updated review of literature. Considering the effectiveness of M. oleifera, this study would be useful for further research into the pharmacological potential and therapeutic insights of M. oleifera, as well as prospects of Moringa-based effective medicine development for human benefits.
Collapse
Affiliation(s)
- Tanzina Akter
- ABEx Bio-Research Center, East Azampur, Dhaka 1230, Bangladesh; (T.A.); (M.A.R.); (A.M.); (M.A.I.A.); (A.F.); (M.A.H.)
| | - Md Atikur Rahman
- ABEx Bio-Research Center, East Azampur, Dhaka 1230, Bangladesh; (T.A.); (M.A.R.); (A.M.); (M.A.I.A.); (A.F.); (M.A.H.)
| | - Akhi Moni
- ABEx Bio-Research Center, East Azampur, Dhaka 1230, Bangladesh; (T.A.); (M.A.R.); (A.M.); (M.A.I.A.); (A.F.); (M.A.H.)
| | - Md. Aminul Islam Apu
- ABEx Bio-Research Center, East Azampur, Dhaka 1230, Bangladesh; (T.A.); (M.A.R.); (A.M.); (M.A.I.A.); (A.F.); (M.A.H.)
| | - Atqiya Fariha
- ABEx Bio-Research Center, East Azampur, Dhaka 1230, Bangladesh; (T.A.); (M.A.R.); (A.M.); (M.A.I.A.); (A.F.); (M.A.H.)
| | - Md. Abdul Hannan
- ABEx Bio-Research Center, East Azampur, Dhaka 1230, Bangladesh; (T.A.); (M.A.R.); (A.M.); (M.A.I.A.); (A.F.); (M.A.H.)
- Department of Biochemistry and Molecular Biology, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh
| | - Md Jamal Uddin
- ABEx Bio-Research Center, East Azampur, Dhaka 1230, Bangladesh; (T.A.); (M.A.R.); (A.M.); (M.A.I.A.); (A.F.); (M.A.H.)
- Graduate School of Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, Seoul 03760, Korea
| |
Collapse
|
5
|
Fooladvand F, Tahouri V, Baeeri M, Minaei T, Rahimifard M, Hodjat M, Khorasani R, Haghi-Aminjan H, Abdollahi M. Toxic potential of botulinum toxin type A on senescence in a Drosophila melanogaster model. Toxicol Rep 2021; 8:1576-1582. [PMID: 34458104 PMCID: PMC8379625 DOI: 10.1016/j.toxrep.2021.08.002] [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: 06/18/2021] [Revised: 07/28/2021] [Accepted: 08/13/2021] [Indexed: 10/31/2022] Open
Abstract
Botulinum toxin type-A (BoNT/A) application, especially neurological disorders, has been spread nowadays while it may cause side effects. The current study aimed to assess the BoNT/A dose-dependent effect on induction of aging in the Drosophila melanogaster model. The third instar larvae of Drosophila melanogaster were exposed to ¼ LC50, ½ LC50, and LC50 of BoNT/A in the Drosophila diet for 48 h while H2O2 1% was used as a positive control. After the exposure time, some larvae were collected for molecular study, including gene expression analysis, comet assay, oxidative stress markers, and the phenotype changes. BoNT/A induced dose-dependent cytotoxicity, elevated reactive oxygen species (ROS) levels, and superoxide dismutase (SOD) enzyme activity. In addition, it caused DNA damage and activated caspase-3 and -9, and reduced the body size of the fly, especially in high doses. In line with the purpose of the study, aging markers, including β-galactosidase (β-gal), p16, p21, p38, and p53, were up-regulated by BoNT/A low dose. BoNT/A activates the aging pathway in the low dose, and increasing the dose induces toxicity, including oxidative stress, DNA damage, and apoptosis.
Collapse
Affiliation(s)
- Farnoosh Fooladvand
- Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran.,Toxicology and Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Vida Tahouri
- Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran.,Toxicology and Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Maryam Baeeri
- Toxicology and Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Tayebeh Minaei
- Department of Cell and Molecular Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Mahban Rahimifard
- Toxicology and Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Mahshid Hodjat
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Reza Khorasani
- Department of Toxicology and Pharmacology, School of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamed Haghi-Aminjan
- Pharmaceutical Sciences Research Center, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Mohammad Abdollahi
- Toxicology and Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences (TUMS), Tehran, Iran.,Department of Toxicology and Pharmacology, School of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
6
|
Imre G, Krähling V, Eichler M, Trautmann S, Ferreirós N, Aman MJ, Kashanchi F, Rajalingam K, Pöhlmann S, Becker S, Meyer Zu Heringdorf D, Pfeilschifter J. The sphingosine kinase 1 activator, K6PC-5, attenuates Ebola virus infection. iScience 2021; 24:102266. [PMID: 33817572 PMCID: PMC8005759 DOI: 10.1016/j.isci.2021.102266] [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: 07/07/2020] [Revised: 02/08/2021] [Accepted: 03/01/2021] [Indexed: 12/18/2022] Open
Abstract
Ebola virus (EBOV) is responsible for outbreaks with case fatality rates of up to 90% and for an epidemic in West Africa with more than ten thousand deaths. EBOV glycoprotein (EBOV-GP) is the only viral surface protein and is responsible for viral entry into cells. Here, by employing pseudotyped EBOV-GP viral particles, we uncover a critical role for sphingolipids in inhibiting viral entry. Sphingosine kinase 1 (SphK1) catalyzes the phosphorylation of sphingosine to sphingosine 1-phosphate (S1P). The administration of the SphK1 activator, K6PC-5, or S1P, or the overexpression of SphK1 consistently exhibited striking inhibitory effects in EBOV-GP-driven entry in diverse cell lines. Finally, K6PC-5 markedly reduced the EBOV titer in infected cells and the de novo production of viral proteins. These data present K6PC-5 as an efficient tool to inhibit EBOV infection in endothelial cells and suggest further studies to evaluate its systemic effects. K6PC-5, a sphingosine kinase 1 activator, inhibits Ebola virus infection Sphingosine 1-phosphate, the product of SphK1, attenuates the viral entry Inhibiton/activation of S1P receptors has no influence on Ebola virus entry These data support the endogen effect of S1P in Ebola virus infection
Collapse
Affiliation(s)
- Gergely Imre
- Institute of General Pharmacology and Toxicology, University Hospital Frankfurt, Goethe University Frankfurt, Frankfurt am Main 60590, Germany
| | - Verena Krähling
- Institute of Virology, Philipps University Marburg, Marburg, Germany.,German Center for Infection Research (DZIF), partner site Gießen-Marburg-Langen, Marburg, Germany
| | - Madeleine Eichler
- Institute of General Pharmacology and Toxicology, University Hospital Frankfurt, Goethe University Frankfurt, Frankfurt am Main 60590, Germany
| | - Sandra Trautmann
- Institute of Clinical Pharmacology, University Hospital Frankfurt, Goethe University Frankfurt, Frankfurt am Main 60590, Germany
| | - Nerea Ferreirós
- Institute of Clinical Pharmacology, University Hospital Frankfurt, Goethe University Frankfurt, Frankfurt am Main 60590, Germany
| | - M Javad Aman
- Integrated BioTherapeutics, Inc., Gaithersburg, MD 20850, USA
| | - Fatah Kashanchi
- Laboratory of Molecular Virology, George Mason University Manassas, VA 20110, USA
| | - Krishnaraj Rajalingam
- Cell Biology Unit, University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
| | - Stefan Pöhlmann
- Infection Biology Unit, German Primate Center - Leibniz Institute for Primate Research, 37077 Göttingen, Germany.,Faculty of Biology and Psychology, University Göttingen, 37077 Göttingen, Germany
| | - Stephan Becker
- Institute of Virology, Philipps University Marburg, Marburg, Germany.,German Center for Infection Research (DZIF), partner site Gießen-Marburg-Langen, Marburg, Germany
| | - Dagmar Meyer Zu Heringdorf
- Institute of General Pharmacology and Toxicology, University Hospital Frankfurt, Goethe University Frankfurt, Frankfurt am Main 60590, Germany
| | - Josef Pfeilschifter
- Institute of General Pharmacology and Toxicology, University Hospital Frankfurt, Goethe University Frankfurt, Frankfurt am Main 60590, Germany
| |
Collapse
|
7
|
Imre G. Cell death signalling in virus infection. Cell Signal 2020; 76:109772. [PMID: 32931899 PMCID: PMC7486881 DOI: 10.1016/j.cellsig.2020.109772] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/01/2020] [Accepted: 09/02/2020] [Indexed: 02/06/2023]
Abstract
Apoptosis, necroptosis and pyroptosis represent three major regulated cell death modalities. Apoptosis features cell shrinkage, nuclear fragmentation and cytoplasm-blebbing. Necroptosis and pyroptosis exhibit osmotic imbalances in the cell accompanied by early membrane ruptures, which morphologically resembles necrosis. Importantly, these two lytic cell death forms facilitate the release of damage associated molecular patterns into the extracellular space leading to inflammatory response. Whereas, during apoptosis, the membrane integrity is preserved and the apoptotic cell is removed by neighbouring cells ensuring the avoidance of immune-stimulation. Viruses comprise a versatile group of intracellular pathogens, which elicit various strategies to infect and to propagate. Viruses are recognized by a myriad of pathogen recognition receptors in the human cells, which consequently lead to activation of the immune system and in certain circumstances cell-autonomous cell death. Importantly, the long-standing view that a cell death inducing capacity of a virus is equal to its pathogenic potential seems to be only partially valid. The altruistic cell death of an infected cell may serve the whole organism by ultimately curbing the way of virus manufacturing. In fact, several viruses express "anti-cell death" proteins to avoid this viral-defence mechanism. Conversely, some viruses hijack cell death pathways to selectively destroy cell populations in order to compromise the immune system of the host. This review discusses the pros and cons of virus induced cell death from the perspective of the host cells and attempts to provide a comprehensive overview of the complex network of cell death signalling in virus infection.
Collapse
Affiliation(s)
- Gergely Imre
- Institute of General Pharmacology and Toxicology, University Hospital Frankfurt, Goethe University Frankfurt, Frankfurt am Main 60590, Germany.
| |
Collapse
|
8
|
The ameliorative impacts of Moringa oleifera leaf extract against oxidative stress and methotrexate-induced hepato-renal dysfunction. Biomed Pharmacother 2020; 128:110259. [DOI: 10.1016/j.biopha.2020.110259] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 05/03/2020] [Accepted: 05/10/2020] [Indexed: 12/25/2022] Open
|
9
|
Abstract
Cell death is an important facet of animal development. In some developing tissues, death is the ultimate fate of over 80% of generated cells. Although recent studies have delineated a bewildering number of cell death mechanisms, most have only been observed in pathological contexts, and only a small number drive normal development. This Primer outlines the important roles, different types and molecular players regulating developmental cell death, and discusses recent findings with which the field currently grapples. We also clarify terminology, to distinguish between developmental cell death mechanisms, for which there is evidence for evolutionary selection, and cell death that follows genetic, chemical or physical injury. Finally, we suggest how advances in understanding developmental cell death may provide insights into the molecular basis of developmental abnormalities and pathological cell death in disease.
Collapse
Affiliation(s)
- Piya Ghose
- Department of Biology, The University of Texas at Arlington, 655 Mitchell St., Arlington, TX 76019, USA
| | - Shai Shaham
- Laboratory of Developmental Genetics, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA
| |
Collapse
|
10
|
Trevelyan SJ, Brewster JL, Burgess AE, Crowther JM, Cadell AL, Parker BL, Croucher DR, Dobson RCJ, Murphy JM, Mace PD. Structure-based mechanism of preferential complex formation by apoptosis signal–regulating kinases. Sci Signal 2020; 13:13/622/eaay6318. [DOI: 10.1126/scisignal.aay6318] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Apoptosis signal–regulating kinases (ASK1, ASK2, and ASK3) are activators of the p38 and c-Jun N-terminal kinase (JNK) mitogen-activated protein kinase (MAPK) pathways. ASK1–3 form oligomeric complexes known as ASK signalosomes that initiate signaling cascades in response to diverse stress stimuli. Here, we demonstrated that oligomerization of ASK proteins is driven by previously uncharacterized sterile-alpha motif (SAM) domains that reside at the carboxy-terminus of each ASK protein. SAM domains from ASK1–3 exhibited distinct behaviors, with the SAM domain of ASK1 forming unstable oligomers, that of ASK2 remaining predominantly monomeric, and that of ASK3 forming a stable oligomer even at a low concentration. In contrast to their behavior in isolation, the ASK1 and ASK2 SAM domains preferentially formed a stable heterocomplex. The crystal structure of the ASK3 SAM domain, small-angle x-ray scattering, and mutagenesis suggested that ASK3 oligomers and ASK1-ASK2 complexes formed discrete, quasi-helical rings through interactions between the mid-loop of one molecule and the end helix of another molecule. Preferential ASK1-ASK2 binding was consistent with mass spectrometry showing that full-length ASK1 formed hetero-oligomeric complexes incorporating large amounts of ASK2. Accordingly, disrupting the association between SAM domains impaired ASK activity in the context of electrophilic stress induced by 4-hydroxy-2-nonenal (HNE). These findings provide a structural template for how ASK proteins assemble foci that drive inflammatory signaling and reinforce the notion that strategies to target ASK proteins should consider the concerted actions of multiple ASK family members.
Collapse
Affiliation(s)
- Sarah J. Trevelyan
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, P.O. Box 56, 710 Cumberland St., Dunedin 9054, New Zealand
| | - Jodi L. Brewster
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, P.O. Box 56, 710 Cumberland St., Dunedin 9054, New Zealand
| | - Abigail E. Burgess
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, P.O. Box 56, 710 Cumberland St., Dunedin 9054, New Zealand
| | - Jennifer M. Crowther
- Biomolecular Interaction Centre, School of Biological Sciences, University of Canterbury, Christchurch, New Zealand
| | - Antonia L. Cadell
- Kinghorn Cancer Centre, Garvan Institute of Medical Research, Sydney, New South Wales 2010, Australia
| | - Benjamin L. Parker
- Department of Physiology, School of Biomedical Sciences, University of Melbourne, Parkville, Victoria 3010, Australia
| | - David R. Croucher
- Kinghorn Cancer Centre, Garvan Institute of Medical Research, Sydney, New South Wales 2010, Australia
- St Vincent’s Hospital Clinical School, University of New South Wales, Sydney, New South Wales, 2052, Australia
- School of Medicine and Medical Science, University College Dublin, Belfield, Dublin 4, Ireland
| | - Renwick C. J. Dobson
- Biomolecular Interaction Centre, School of Biological Sciences, University of Canterbury, Christchurch, New Zealand
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria 3010, Australia
| | - James M. Murphy
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Peter D. Mace
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, P.O. Box 56, 710 Cumberland St., Dunedin 9054, New Zealand
| |
Collapse
|
11
|
Imre G. The involvement of regulated cell death forms in modulating the bacterial and viral pathogenesis. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2020; 353:211-253. [PMID: 32381176 PMCID: PMC7102569 DOI: 10.1016/bs.ircmb.2019.12.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Apoptosis, necroptosis and pyroptosis represent three distinct types of regulated cell death forms, which play significant roles in response to viral and bacterial infections. Whereas apoptosis is characterized by cell shrinkage, nuclear condensation, bleb formation and retained membrane integrity, necroptosis and pyroptosis exhibit osmotic imbalance driven cytoplasmic swelling and early membrane damage. These three cell death forms exert distinct immune stimulatory potential. The caspase driven apoptotic cell demise is considered in many circumstances as anti-inflammatory, whereas the two lytic cell death modalities can efficiently trigger immune response by releasing damage associated molecular patterns to the extracellular space. The relevance of these cell death modalities in infections can be best demonstrated by the presence of viral proteins that directly interfere with cell death pathways. Conversely, some pathogens hijack the cell death signaling routes to initiate a targeted attack against the immune cells of the host, and extracellular bacteria can benefit from the destruction of intact extracellular barriers upon cell death induction. The complexity and the crosstalk between these cell death modalities reflect a continuous evolutionary race between pathogens and host. This chapter discusses the current advances in the research of cell death signaling with regard to viral and bacterial infections and describes the network of the cell death initiating molecular mechanisms that selectively recognize pathogen associated molecular patterns.
Collapse
Affiliation(s)
- Gergely Imre
- Institute of General Pharmacology and Toxicology, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany.
| |
Collapse
|
12
|
A Cell's Fate: An Overview of the Molecular Biology and Genetics of Apoptosis. Int J Mol Sci 2019; 20:ijms20174133. [PMID: 31450613 PMCID: PMC6747454 DOI: 10.3390/ijms20174133] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 07/15/2019] [Accepted: 07/17/2019] [Indexed: 12/30/2022] Open
Abstract
Apoptosis is one of the main types of regulated cell death, a complex process that can be triggered by external or internal stimuli, which activate the extrinsic or the intrinsic pathway, respectively. Among various factors involved in apoptosis, several genes and their interactive networks are crucial regulators of the outcomes of each apoptotic phase. Furthermore, mitochondria are key players in determining the way by which cells will react to internal stress stimuli, thus being the main contributor of the intrinsic pathway, in addition to providing energy for the whole process. Other factors that have been reported as important players of this intricate molecular network are miRNAs, which regulate the genes involved in the apoptotic process. Imbalance in any of these mechanisms can lead to the development of several illnesses, hence, an overall understanding of these processes is essential for the comprehension of such situations. Although apoptosis has been widely studied, the current literature lacks an updated and more general overview on this subject. Therefore, here, we review and discuss the mechanisms of apoptosis, highlighting the roles of genes, miRNAs, and mitochondria involved in this type of cell death.
Collapse
|
13
|
Shen C, Pei J, Guo X, Zhou L, Li Q, Quan J. Structural basis for dimerization of the death effector domain of the F122A mutant of Caspase-8. Sci Rep 2018; 8:16723. [PMID: 30425291 PMCID: PMC6233201 DOI: 10.1038/s41598-018-35153-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 10/19/2018] [Indexed: 11/09/2022] Open
Abstract
Caspase-8 is an apoptotic protease that is activated by a proximity-induced dimerization mechanism within the death-inducing signaling complex (DISC). The death effector domain (DED) of caspase-8 is involved in protein-protein interactions and is essential for the activation. Here, we report two crystal structures of the dimeric DEDs of the F122A mutant of caspase-8, both of which illustrate a novel domain-swapped dimerization, while differ in the relative orientation of the two subunits and the solvent exposure of the conserved hydrophobic patch Phe122/Leu123. We demonstrate that mutations disrupting the dimerization of the DEDs abrogate the formation of cellular death effector filaments (DEFs) and the induced apoptosis by overexpressed DEDs. Furthermore, such dimerization-disrupting mutations also impair the activation of the full-length caspase-8 and the downstream apoptosis cascade. The structures provide new insights into understanding the mechanism underlying the activation of procaspase-8 within the DISC and DEFs.
Collapse
Affiliation(s)
- Chen Shen
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Jianwen Pei
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Xiaomin Guo
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Lu Zhou
- School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Qinkai Li
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Junmin Quan
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
| |
Collapse
|
14
|
Abstract
Inhibitor of apoptosis (IAP) family comprises a group of endogenous proteins that function as main regulators of caspase activity and cell death. They are considered the main culprits in evasion of apoptosis, which is a fundamental hallmark of carcinogenesis. Overexpression of IAP proteins has been documented in various solid and hematological malignancies, rendering them resistant to standard chemotherapeutics and radiation therapy and conferring poor prognosis. This observation has urged their exploitation as therapeutic targets in cancer with promising pre-clinical outcomes. This review describes the structural and functional features of IAP proteins to elucidate the mechanism of their anti-apoptotic activity. We also provide an update on patterns of IAP expression in different tumors, their impact on treatment response and prognosis, as well as the emerging investigational drugs targeting them. This aims at shedding the light on the advances in IAP targeting achieved to date, and encourage further development of clinically applicable therapeutic approaches.
Collapse
Affiliation(s)
- Mervat S Mohamed
- Department of Biochemistry, Faculty of Science, University of Tabuk, Tabuk, Kingdom of Saudi Arabia.
- Department of Chemistry, Biochemistry Speciality, Faculty of Science, Cairo University, Giza, Egypt.
- , Tabuk, Kingdom of Saudi Arabia.
| | - Mai K Bishr
- Department of Radiotherapy, Children's Cancer Hospital Egypt (CCHE), Cairo, Egypt
| | - Fahad M Almutairi
- Department of Biochemistry, Faculty of Science, University of Tabuk, Tabuk, Kingdom of Saudi Arabia
| | - Ayat G Ali
- Department of Biochemistry, El Sahel Teaching Hospital, Cairo, Egypt
| |
Collapse
|
15
|
Gorelick-Ashkenazi A, Weiss R, Sapozhnikov L, Florentin A, Tarayrah-Ibraheim L, Dweik D, Yacobi-Sharon K, Arama E. Caspases maintain tissue integrity by an apoptosis-independent inhibition of cell migration and invasion. Nat Commun 2018; 9:2806. [PMID: 30022065 PMCID: PMC6052023 DOI: 10.1038/s41467-018-05204-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 05/22/2018] [Indexed: 11/15/2022] Open
Abstract
Maintenance of tissue integrity during development and homeostasis requires the precise coordination of several cell-based processes, including cell death. In animals, the majority of such cell death occurs by apoptosis, a process mediated by caspase proteases. To elucidate the role of caspases in tissue integrity, we investigated the behavior of Drosophila epithelial cells that are severely compromised for caspase activity. We show that these cells acquire migratory and invasive capacities, either within 1–2 days following irradiation or spontaneously during development. Importantly, low levels of effector caspase activity, which are far below the threshold required to induce apoptosis, can potently inhibit this process, as well as a distinct, developmental paradigm of primordial germ cell migration. These findings may have implications for radiation therapy in cancer treatment. Furthermore, given the presence of caspases throughout metazoa, our results could imply that preventing unwanted cell migration constitutes an ancient non-apoptotic function of these proteases. In addition to regulating programmed cell death, caspases also have non-apoptotic roles. Here, the authors show that low level caspase activity prevents cell migration to maintain tissue integrity.
Collapse
Affiliation(s)
| | - Ron Weiss
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Lena Sapozhnikov
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Anat Florentin
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, 76100, Israel.,Department of Cellular Biology, University of Georgia, Athens, GA, 30602-2607, USA
| | | | - Dima Dweik
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Keren Yacobi-Sharon
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Eli Arama
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, 76100, Israel.
| |
Collapse
|
16
|
Watanabe C, Shu GL, Giltiay NV, Clark EA. Regulation of B-lineage cells by caspase 6. Immunol Cell Biol 2018; 96:1072-1082. [PMID: 29863787 DOI: 10.1111/imcb.12172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 02/06/2018] [Accepted: 05/30/2018] [Indexed: 01/07/2023]
Abstract
The caspase (Casp) family of proteases regulate both lymphocyte apoptosis and activation. Here, we show that Casp6 regulates early B-cell development. One-week-old Casp6 knockout (Casp6 KO) mice have significantly more splenic B-cell subsets than wild-type (WT) mice. Adult Casp6 KO mice have normal levels of total splenic B cells but have increased numbers of B1a B cells and CD43+ "transitional" or splenic red pulp (RP) B cells. These results suggested that Casp6 may function to control B-cell numbers under nonhomeostatic conditions and during B-cell development. Consistent with this model, reconstitution of B cells was dysregulated in Casp6 KO mice after sublethal irradiation. Furthermore, bone marrow pro-B, pre-B and immature B-cell numbers were significantly higher in 1-week-old Casp6 KO mice than in 1-week-old WT mice. Casp6 KO pro-B cells proliferated more in response to IL-7 than WT pro-B cells, suggesting that Casp6 regulates early B-cell responses to IL-7. Indeed, adult and aged Casp6 KO mice had elevated numbers of IL-7αR+ Sca1+ precursors of common lymphoid progenitors, suggesting Casp6 may help regulate progenitors of B cells and early B-lineage cells. Casp6 regulates B-cell programs both during early development and after antigen stimulation in the periphery.
Collapse
Affiliation(s)
- Chie Watanabe
- Department of Immunology, University of Washington, Seattle, WA, 98109, USA
| | - Geraldine L Shu
- Department of Immunology, University of Washington, Seattle, WA, 98109, USA
| | - Natalia V Giltiay
- Department of Immunology, University of Washington, Seattle, WA, 98109, USA.,Division of Rheumatology, Department of Medicine, University of Washington, Seattle, WA, 98109, USA
| | - Edward A Clark
- Department of Immunology, University of Washington, Seattle, WA, 98109, USA.,Division of Rheumatology, Department of Medicine, University of Washington, Seattle, WA, 98109, USA
| |
Collapse
|
17
|
|
18
|
Schoenhacker-Alte B, Mohr T, Pirker C, Kryeziu K, Kuhn PS, Buck A, Hofmann T, Gerner C, Hermann G, Koellensperger G, Keppler BK, Berger W, Heffeter P. Sensitivity towards the GRP78 inhibitor KP1339/IT-139 is characterized by apoptosis induction via caspase 8 upon disruption of ER homeostasis. Cancer Lett 2017; 404:79-88. [PMID: 28716523 DOI: 10.1016/j.canlet.2017.07.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 07/05/2017] [Accepted: 07/07/2017] [Indexed: 11/30/2022]
Abstract
The ruthenium drug and GRP78 inhibitor KP1339/IT-139 has already demonstrated promising anticancer activity in a phase I clinical trial. This study aimed to identify mechanisms underlying increased sensitivity to KP1339 treatment. Based on a screen utilizing 23 cell lines, a small panel was selected to compare KP1339-sensitive and low-responsive models. KP1339 sensitivity was neither based on differences in ruthenium accumulation, nor sensitivity to oxidative stress or constituents of KP1339 (ruthenium chloride and indazole). Subsequently, the biochemical response to KP1339 was analyzed using whole genome expression arrays indicating that, while sensitive cell lines were characterized by "response to chemical stimuli" and "regulation of cell death", low-responsive cells preferentially activated pathways controlling cell cycle, DNA repair, and metabolism. Cell culture experiments confirmed that, while low-responsive cells executed cell cycle arrest in G2 phase, pronounced apoptosis induction via activation of caspase 8 was found in sensitive cells. Cell death induction is based on a unique disruption of the ER homeostasis by depletion of key cellular chaperones including GRP78 in combination with enhanced KP1339-mediated protein damage.
Collapse
Affiliation(s)
- Beatrix Schoenhacker-Alte
- Institute of Inorganic Chemistry, University of Vienna, Waehringer Str. 42, A-1090, Vienna, Austria; Department of Medicine I, Institute of Cancer Research, Comprehensive Cancer Center of the Medical University, Medical University of Vienna, Borschkegasse 8a, A-1090, Vienna, Austria
| | - Thomas Mohr
- Department of Medicine I, Institute of Cancer Research, Comprehensive Cancer Center of the Medical University, Medical University of Vienna, Borschkegasse 8a, A-1090, Vienna, Austria
| | - Christine Pirker
- Department of Medicine I, Institute of Cancer Research, Comprehensive Cancer Center of the Medical University, Medical University of Vienna, Borschkegasse 8a, A-1090, Vienna, Austria
| | - Kushtrim Kryeziu
- Department of Medicine I, Institute of Cancer Research, Comprehensive Cancer Center of the Medical University, Medical University of Vienna, Borschkegasse 8a, A-1090, Vienna, Austria
| | - Paul-Steffen Kuhn
- Institute of Inorganic Chemistry, University of Vienna, Waehringer Str. 42, A-1090, Vienna, Austria
| | - Alicia Buck
- Department of Medicine I, Institute of Cancer Research, Comprehensive Cancer Center of the Medical University, Medical University of Vienna, Borschkegasse 8a, A-1090, Vienna, Austria
| | - Thilo Hofmann
- Department of Environmental Geosciences, University of Vienna, Althanstraße 14, A-1090, Vienna, Austria
| | - Christopher Gerner
- Department of Analytical Chemistry, University of Vienna, Waehringer Str. 38, A-1090, Vienna, Austria
| | - Gerrit Hermann
- Department of Analytical Chemistry, University of Vienna, Waehringer Str. 38, A-1090, Vienna, Austria
| | - Gunda Koellensperger
- Department of Analytical Chemistry, University of Vienna, Waehringer Str. 38, A-1090, Vienna, Austria
| | - Bernhard K Keppler
- Institute of Inorganic Chemistry, University of Vienna, Waehringer Str. 42, A-1090, Vienna, Austria; Department of Medicine I, Institute of Cancer Research, Comprehensive Cancer Center of the Medical University, Medical University of Vienna, Borschkegasse 8a, A-1090, Vienna, Austria
| | - Walter Berger
- Department of Medicine I, Institute of Cancer Research, Comprehensive Cancer Center of the Medical University, Medical University of Vienna, Borschkegasse 8a, A-1090, Vienna, Austria; Research Cluster "Translational Cancer Therapy Research", Vienna, Austria
| | - Petra Heffeter
- Department of Medicine I, Institute of Cancer Research, Comprehensive Cancer Center of the Medical University, Medical University of Vienna, Borschkegasse 8a, A-1090, Vienna, Austria; Research Cluster "Translational Cancer Therapy Research", Vienna, Austria.
| |
Collapse
|
19
|
Zhang D, Zhao N, Ma B, Wang Y, Zhang G, Yan X, Hu S, Xu T. Procaspase-9 induces its cleavage by transnitrosylating XIAP via the Thioredoxin system during cerebral ischemia-reperfusion in rats. Sci Rep 2016; 6:24203. [PMID: 27052476 PMCID: PMC4823698 DOI: 10.1038/srep24203] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 03/21/2016] [Indexed: 12/18/2022] Open
Abstract
Transnitrosylation is an important mechanism by which nitric oxide (NO) modulates cell signaling pathways. For instance, SNO-caspase-3 can transnitrosylate the X-linked inhibitor of apoptosis (XIAP) to enhance apoptosis. XIAP is a potent antagonist of caspase apoptotic activity. Decrease in XIAP activity via nitrosylation results in SNO-XIAP-mediated caspase activation. Considering the functional liaison of procaspase-9 and XIAP, we hypothesized that procaspase-9 nitrosylates XIAP directly. Our data confirmed that cerebral ischemia-reperfusion induced XIAP nitrosylation, procaspase-9 denitrosylation and cleavage. Interestingly, the time courses of the nitrosylation of procaspase-9 and XIAP were negatively correlated, which was more prominent after cerebral ischemia-reperfusion, suggesting a direct interaction. The nitrosylation of XIAP, as well as the denitrosylation and cleavage of procaspase-9, were inhibited by DNCB, TrxR1 AS-ODNs, or TAT-AVPY treatment. Meanwhile, DNCB, TrxR1 AS-ODNs, or TAT-AVPY also inhibited the decrease in hippocampal CA1 neurons induced by ischemia-reperfusion in rats. The denitrosylation and cleavage of procaspase-9 induced by OGD/reoxygenation in SH-SY5Y cells were inhibited when cells were co-transfected with wild-type procaspase-9 and XIAP mutant (C449G). These data suggest that cerebral ischemia-reperfusion induces a transnitrosylation from procaspase-9 to XIAP via the Trx system to consequently cause apoptosis. Additionally, Cys325 is a critical S-nitrosylation site of procaspase-9.
Collapse
Affiliation(s)
- Dengyue Zhang
- Jiangsu Key Laboratory of Brain Disease Bioinformation, Xuzhou Medical College, Xuzhou 221004, China
| | - Ningjun Zhao
- Institute of Emergency Rescue Medicine, Xuzhou Medical College, Xuzhou 221002, China.,Emergency Center of the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
| | - Bin Ma
- Jiangsu Key Laboratory of Brain Disease Bioinformation, Xuzhou Medical College, Xuzhou 221004, China.,Institute of Emergency Rescue Medicine, Xuzhou Medical College, Xuzhou 221002, China
| | - Yan Wang
- Institute of Emergency Rescue Medicine, Xuzhou Medical College, Xuzhou 221002, China
| | - Gongliang Zhang
- Department of Physiology, College of Basic Medical Science, Anhui Medical University, 81 Meishan Road, Hefei, Anhui 230032, China
| | - Xianliang Yan
- Institute of Emergency Rescue Medicine, Xuzhou Medical College, Xuzhou 221002, China.,Emergency Center of the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
| | - Shuqun Hu
- Institute of Emergency Rescue Medicine, Xuzhou Medical College, Xuzhou 221002, China.,Emergency Center of the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
| | - Tie Xu
- Institute of Emergency Rescue Medicine, Xuzhou Medical College, Xuzhou 221002, China.,Emergency Center of the Affiliated Hospital of Xuzhou Medical College, Xuzhou 221002, China
| |
Collapse
|
20
|
Abstract
Mitochondrial ribosomes (mitoribosomes) perform protein synthesis inside mitochondria, the organelles responsible for energy conversion and adenosine triphosphate production in eukaryotic cells. Throughout evolution, mitoribosomes have become functionally specialized for synthesizing mitochondrial membrane proteins, and this has been accompanied by large changes to their structure and composition. We review recent high-resolution structural data that have provided unprecedented insight into the structure and function of mitoribosomes in mammals and fungi.
Collapse
Affiliation(s)
- Basil J Greber
- Department of Biology, Institute of Molecular Biology and Biophysics, ETH Zurich, CH-8093 Zurich, Switzerland; .,*Present address: California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, California 94720-3220
| | - Nenad Ban
- Department of Biology, Institute of Molecular Biology and Biophysics, ETH Zurich, CH-8093 Zurich, Switzerland;
| |
Collapse
|
21
|
Structural Characterizations of the Fas Receptor and the Fas-Associated Protein with Death Domain Interactions. Protein J 2016; 35:51-60. [PMID: 26743763 DOI: 10.1007/s10930-015-9646-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The Fas receptor is a representative death receptor, and the Fas-associated protein with death domain (FADD) is a crucial adapter protein needed to support the Fas receptor's activity. The Fas-FADD interactions constitute an important signaling pathway that ultimately induces apoptosis or programmed cell death in biological systems. The interactions responsible for this cell-death process are governed by the binding process of the Fas ligand to the Fas, followed by the caspase cascade activation. Using a computational approach, the present communication explores certain essential structural aspects of the Fas-FADD death domains and their interfacial interactions.
Collapse
|
22
|
|
23
|
Dillon CP, Green DR. Molecular Cell Biology of Apoptosis and Necroptosis in Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 930:1-23. [PMID: 27558815 DOI: 10.1007/978-3-319-39406-0_1] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Cell death is a major mechanism to eliminate cells in which DNA is damaged, organelles are stressed, or oncogenes are overexpressed, all events that would otherwise predispose cells to oncogenic transformation. The pathways that initiate and execute cell death are complex, genetically encoded, and subject to significant regulation. Consequently, while these pathways are often mutated in malignancy, there is considerable interest in inducing cell death in tumor cells as therapy. This chapter addresses our current understanding of molecular mechanisms contributing to two cell death pathways, apoptotic cell death and necroptosis, a regulated form of necrotic cell death. Apoptosis can be induced by a wide variety of signals, leading to protease activation that dismantles the cell. We discuss the physiological importance of each apoptosis pathway and summarize their known roles in cancer suppression and the current efforts at targeting each pathway therapeutically. The intricate mechanistic link between death receptor-mediated apoptosis and necroptosis is described, as well as the potential opportunities for utilizing necroptosis in the treatment of malignancy.
Collapse
Affiliation(s)
- Christopher P Dillon
- Department of Immunology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA.
| | - Douglas R Green
- Department of Immunology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA.
| |
Collapse
|
24
|
Soriano J, Villanueva A, Stockert JC, Cañete M. Regulated necrosis in HeLa cells induced by ZnPc photodynamic treatment: a new nuclear morphology. Int J Mol Sci 2014; 15:22772-85. [PMID: 25501332 PMCID: PMC4284736 DOI: 10.3390/ijms151222772] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 11/03/2014] [Accepted: 12/01/2014] [Indexed: 12/05/2022] Open
Abstract
Photodynamic therapy (PDT) is a cancer treatment modality based on the administration of a photosensitizer (PS), which accumulates preferentially in tumor cells. Subsequent irradiation of the neoplastic area triggers a cascade of photochemical reactions that leads to the formation of highly reactive oxygen species responsible for cell inactivation. Photodynamic treatments in vitro are performed with the PS, zinc-phthalocyanine (ZnPc). The PS is near the plasma membrane during uptake and internalization. Inactivation clearly occurs by a necrotic process, manifested by nuclear pyknosis, negative TUNEL and Annexin V assays and non-relocation of cytochrome c. In contrast, by increasing the incubation time, ZnPc is accumulated in the Golgi apparatus and produces cell inactivation with characteristics of apoptosis and necrosis: TUNEL positive, relocated cytochrome c and negative Annexin V assay. This type of death produces a still undescribed granulated nuclear morphology, which is different from that of necrosis or apoptosis. This morphology is inhibited by necrostatin-1, a specific inhibitor of regulated necrosis.
Collapse
Affiliation(s)
- Jorge Soriano
- Department of Biology, University Autonomous of Madrid, 28049 Madrid, Spain.
| | - Angeles Villanueva
- Department of Biology, University Autonomous of Madrid, 28049 Madrid, Spain.
| | | | - Magdalena Cañete
- Department of Biology, University Autonomous of Madrid, 28049 Madrid, Spain.
| |
Collapse
|
25
|
Yang YH, Li B, Zheng XF, Chen JW, Chen K, Jiang SD, Jiang LS. Oxidative damage to osteoblasts can be alleviated by early autophagy through the endoplasmic reticulum stress pathway--implications for the treatment of osteoporosis. Free Radic Biol Med 2014; 77:10-20. [PMID: 25224042 DOI: 10.1016/j.freeradbiomed.2014.08.028] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Revised: 08/28/2014] [Accepted: 08/29/2014] [Indexed: 12/11/2022]
Abstract
Oxidative stress can damage various cellular components of osteoblasts, and is regarded as a pivotal pathogenic factor for bone loss. Increasing evidence indicates a significant role of cell autophagy in response to oxidative stress. However, the role of autophagy in the osteoblasts under oxidative stress remains to be clarified. In this study, we verified that hydrogen peroxide induced autophagy and apoptosis in a dose- and time-dependent manner in osteoblastic Mc3T3-E1 cells. Both 3-methyladenine (the early steps of autophagy inhibitor) and bafilomycin A1 (the last steps of autophagy inhibitor) enhanced the cell apoptosis and reactive oxygen species level in the osteoblasts insulted by hydrogen peroxide. However, promotion of autophagy with either a pharmacologic inducer (rapamycin) or the Beclin-1 overexpressing technique rescued the cell apoptosis and reduced the reactive oxygen species level in the cells. Treatment with H2O2 significantly increased the levels of carbonylated proteins, malondialdehyde and 8-hydroxy-2'-deoxyguanosine, decreased the mitochondrial membrane potential, and increased the mitochondria-mediated apoptosis markers. The damaged mitochondria were cleared by autophagy. Furthermore, the molecular levels of the endoplasmic reticula stress signaling pathway changed in hydrogen peroxide-treated Mc3T3-E1 cells, and blocking this stress signaling pathway by RNA interference against candidates of glucose-regulated protein 78 and protein kinase-like endoplasmic reticulum kinase decreased autophagy while increasing apoptosis in the cells. In conclusion, oxidative damage to osteoblasts could be alleviated by early autophagy through the endoplasmic reticulum stress pathway. Our findings suggested that modulation of osteoblast autophagy could have a potentially therapeutic value for osteoporosis.
Collapse
Affiliation(s)
- Yue-Hua Yang
- Department of Orthopaedic Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - Bo Li
- Department of Orthopaedic Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - Xin-Feng Zheng
- Department of Orthopaedic Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - Jiang-Wei Chen
- Department of Orthopaedic Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - Ke Chen
- Department of Orthopaedic Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - Sheng-Dan Jiang
- Department of Orthopaedic Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - Lei-Sheng Jiang
- Department of Orthopaedic Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China.
| |
Collapse
|
26
|
Ashida H, Kim M, Sasakawa C. Manipulation of the host cell death pathway by Shigella. Cell Microbiol 2014; 16:1757-66. [PMID: 25264025 DOI: 10.1111/cmi.12367] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 08/11/2014] [Accepted: 08/21/2014] [Indexed: 12/25/2022]
Abstract
Host cells deploy multiple defences against microbial infection. One prominent host defence mechanism, the death of infected cells, plays a pivotal role in clearing damaged cells, eliminating pathogens, removing replicative niches, exposing intracellular bacterial pathogens to extracellular immune surveillance and presenting bacteria-derived antigens to the adaptive immune system. Although cell death can occur under either physiological or pathophysiological conditions, it acts as an innate defence mechanism against bacterial pathogens by limiting their persistent colonization. However, many bacterial pathogens, including Shigella, have evolved mechanisms that manipulate host cell death for their own benefit.
Collapse
Affiliation(s)
- Hiroshi Ashida
- Division of Bacterial Infection Biology, Institute of Medical Science, University of Tokyo, Tokyo, 108-8639, Japan
| | | | | |
Collapse
|
27
|
Abstract
Cell turnover is a fundamental feature in metazoans. Cells can die passively, as a consequence of severe damage to their structural integrity, or actively, owing to a more confined biological disruption such as DNA damage. Passive cell death is uncontrolled and often harmful to the organism. In contrast, active cell death is tightly regulated and serves to support the organism's life. Apoptosis-the primary form of regulated cell death-is relatively well defined. Necroptosis-an alternative, distinct kind of regulated cell death discovered more recently-is less well understood. Apoptosis and necroptosis can be triggered either from within the cell or by extracellular stimuli. Certain signaling components, including several death ligands and receptors, can regulate both processes. Whereas apoptosis is triggered and executed via intracellular proteases called caspases, necroptosis is suppressed by caspase activity. Here we highlight current understanding of the key signaling mechanisms that control regulated cell death.
Collapse
Affiliation(s)
- Avi Ashkenazi
- Genentech Inc., South San Francisco, California 94080;
| | | |
Collapse
|
28
|
Small molecules, big effects: the role of microRNAs in regulation of cardiomyocyte death. Cell Death Dis 2014; 5:e1325. [PMID: 25032848 PMCID: PMC4123081 DOI: 10.1038/cddis.2014.287] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 05/28/2014] [Accepted: 06/03/2014] [Indexed: 01/14/2023]
Abstract
MicroRNAs (miRNAs) are a class of small non-coding RNAs involved in posttranscriptional regulation of gene expression, and exerting regulatory roles in plethora of biological processes. In recent years, miRNAs have received increased attention for their crucial role in health and disease, including in cardiovascular disease. This review summarizes the role of miRNAs in regulation of cardiac cell death/cell survival pathways, including apoptosis, autophagy and necrosis. It is envisaged that these miRNAs may explain the mechanisms behind the pathogenesis of many cardiac diseases, and, most importantly, may provide new avenues for therapeutic intervention that will limit cardiomyocyte cell death before it irreversibly affects cardiac function. Through an in-depth literature analysis coupled with integrative bioinformatics (pathway and synergy analysis), we dissect here the landscape of complex relationships between the apoptosis-regulating miRNAs in the context of cardiomyocyte cell death (including regulation of autophagy–apoptosis cross talk), and examine the gaps in our current understanding that will guide future investigations.
Collapse
|
29
|
Connolly PF, Jäger R, Fearnhead HO. New roles for old enzymes: killer caspases as the engine of cell behavior changes. Front Physiol 2014; 5:149. [PMID: 24795644 PMCID: PMC3997007 DOI: 10.3389/fphys.2014.00149] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 03/28/2014] [Indexed: 12/31/2022] Open
Abstract
It has become increasingly clear that caspases, far from being merely cell death effectors, have a much wider range of functions within the cell. These functions are as diverse as signal transduction and cytoskeletal remodeling, and caspases are now known to have an essential role in cell proliferation, migration, and differentiation. There is also evidence that apoptotic cells themselves can direct the behavior of nearby cells through the caspase-dependent secretion of paracrine signaling factors. In some processes, including the differentiation of skeletal muscle myoblasts, both caspase activation in differentiating cells as well as signaling from apoptotic cells has been reported. Here, we review the non-apoptotic outcomes of caspase activity in a range of different model systems and attempt to integrate this knowledge.
Collapse
Affiliation(s)
- Patrick F Connolly
- Pharmacology and Therapeutics, National University of Ireland Galway Galway, Ireland
| | - Richard Jäger
- Department of Natural Sciences, Bonn-Rhein-Sieg University of Applied Sciences Rheinbach, Germany
| | - Howard O Fearnhead
- Pharmacology and Therapeutics, National University of Ireland Galway Galway, Ireland
| |
Collapse
|
30
|
Condon SM, Mitsuuchi Y, Deng Y, LaPorte MG, Rippin SR, Haimowitz T, Alexander MD, Kumar PT, Hendi MS, Lee YH, Benetatos CA, Yu G, Kapoor GS, Neiman E, Seipel ME, Burns JM, Graham MA, McKinlay MA, Li X, Wang J, Shi Y, Feltham R, Bettjeman B, Cumming MH, Vince JE, Khan N, Silke J, Day CL, Chunduru SK. Birinapant, a smac-mimetic with improved tolerability for the treatment of solid tumors and hematological malignancies. J Med Chem 2014; 57:3666-77. [PMID: 24684347 DOI: 10.1021/jm500176w] [Citation(s) in RCA: 119] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Birinapant (1) is a second-generation bivalent antagonist of IAP proteins that is currently undergoing clinical development for the treatment of cancer. Using a range of assays that evaluated cIAP1 stability and oligomeric state, we demonstrated that 1 stabilized the cIAP1-BUCR (BIR3-UBA-CARD-RING) dimer and promoted autoubiquitylation of cIAP1 in vitro. Smac-mimetic 1-induced loss of cIAPs correlated with inhibition of TNF-mediated NF-κB activation, caspase activation, and tumor cell killing. Many first-generation Smac-mimetics such as compound A (2) were poorly tolerated. Notably, animals that lack functional cIAP1, cIAP2, and XIAP are not viable, and 2 mimicked features of triple IAP knockout cells in vitro. The improved tolerability of 1 was associated with (i) decreased potency against cIAP2 and affinity for XIAP BIR3 and (ii) decreased ability to inhibit XIAP-dependent signaling pathways. The P2' position of 1 was critical to this differential activity, and this improved tolerability has allowed 1 to proceed into clinical studies.
Collapse
Affiliation(s)
- Stephen M Condon
- TetraLogic Pharmaceuticals, Inc. , 343 Phoenixville Pike, Malvern, Pennsylvania 19355, United States
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Analysis of the minimal specificity of caspase-2 and identification of Ac-VDTTD-AFC as a caspase-2-selective peptide substrate. Biosci Rep 2014; 34:BSR20140025. [PMID: 27919034 PMCID: PMC3966047 DOI: 10.1042/bsr20140025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 02/12/2014] [Accepted: 02/13/2014] [Indexed: 11/17/2022] Open
Abstract
Caspase-2 is an evolutionarily conserved but enigmatic protease whose biological role remains poorly understood. To date, research into the functions of caspase-2 has been hampered by an absence of reagents that can distinguish its activity from that of the downstream apoptotic caspase, caspase-3. Identification of protein substrates of caspase-2 that are efficiently cleaved within cells may also provide clues to the role of this protease. We used a yeast-based transcriptional reporter system to define the minimal substrate specificity of caspase-2. The resulting profile enabled the identification of candidate novel caspase-2 substrates. Caspase-2 cleaved one of these proteins, the cancer-associated transcription factor Runx1, although with relatively low efficiency. A fluorogenic peptide was derived from the sequence most efficiently cleaved in the context of the transcriptional reporter. This peptide, Ac-VDTTD-AFC, was efficiently cleaved by purified caspase-2 and auto-activating caspase-2 in mammalian cells, and exhibited better selectivity for caspase-2 relative to caspase-3 than reagents that are currently available. We suggest that this reagent, used in parallel with the traditional caspase-3 substrate Ac-DEVD-AFC, will enable researchers to monitor caspase-2 activity in cell lysates and may assist in the determination of stimuli that activate caspase-2 in vivo.
Collapse
|
32
|
Abstract
Apical caspases 8, 9, and 10 are only active as dimers. These dimers are unstable, and to characterize their activity they need to be maintained in vitro in a dimeric state. We provide updated methods for those looking to characterize various aspects of caspase function. We describe full methods for those looking to activate caspases in vitro using kosmotropic reagents, an essential step in characterizing upstream (apical) caspases. We detail methods for fusion of caspase domains to engineered dimerization domains as an alternative method to trigger regulated dimerization of caspases. We also describe methods to determine caspase activity profiles in cells and provide methods for studying the ability of SMAC-mimetic reagents to release inhibition of caspases by IAPs.
Collapse
Affiliation(s)
- Peter D Mace
- Biochemistry Department, University of Otago, Dunedin, New Zealand
| | - Stefan J Riedl
- Program in Cell Death and Survival Networks, NCI Designated Cancer Center, Sanford-Burnham Medical Research Institute, La Jolla, California, USA
| | - Guy S Salvesen
- Program in Cell Death and Survival Networks, NCI Designated Cancer Center, Sanford-Burnham Medical Research Institute, La Jolla, California, USA.
| |
Collapse
|
33
|
Abstract
One of the most valuable tools that have been developed for the study of apoptosis is the availability of recombinant active caspases. The determination of caspase substrate preference, the design of sensitive substrates and potent inhibitors, the resolution of caspase structures, the elucidation of their activation mechanisms, and the identification of their substrates were made possible by the availability of sufficient amounts of enzymatically pure caspases. The current chapter describes at length the expression, purification, and basic enzymatic characterization of apoptotic caspases.
Collapse
Affiliation(s)
- Dave Boucher
- Institute of Molecular Bioscience, University of Queensland, St. Lucia, QLD, Australia
| | | | | |
Collapse
|
34
|
Tokar T, Ulicny J. The mathematical model of the Bcl-2 family mediated MOMP regulation can perform a non-trivial pattern recognition. PLoS One 2013; 8:e81861. [PMID: 24386084 PMCID: PMC3873269 DOI: 10.1371/journal.pone.0081861] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Accepted: 10/21/2013] [Indexed: 12/22/2022] Open
Abstract
Interactions between individual members of the B-cell lymphoma 2 (Bcl-2) family of proteins form a regulatory network governing mitochondrial outer membrane permeabilization (MOMP). Bcl-2 family initiated MOMP causes release of the inter-membrane pro-apoptotic proteins to cytosol and creates a cytosolic environment suitable for the executionary phase of apoptosis. We designed the mathematical model of this regulatory network where the synthesis rates of the Bcl-2 family members served as the independent inputs. Using computational simulations, we have then analyzed the response of the model to up-/downregulation of the Bcl-2 proteins. Under several assumptions, and using estimated reaction parameters, a non-linear stimulus-response emerged, whose characteristics are associated with bistability and switch-like behavior. Interestingly, using the principal component analysis (PCA) we have shown that the given model of the Bcl-2 family interactions classifies the random combinations of inputs into two distinct classes, and responds to these by one of the two qualitatively distinct outputs. As we showed, the emergence of this behavior requires specific organization of the interactions between particular Bcl-2 proteins.
Collapse
Affiliation(s)
- Tomas Tokar
- Department of Biophysics, University of P. J. Safarik in Kosice, Kosice, Slovakia
| | - Jozef Ulicny
- Department of Biophysics, University of P. J. Safarik in Kosice, Kosice, Slovakia
| |
Collapse
|
35
|
|
36
|
Role of caspase-8 in thymus function. Cell Death Differ 2013; 21:226-33. [PMID: 24270406 DOI: 10.1038/cdd.2013.166] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 08/20/2013] [Accepted: 09/12/2013] [Indexed: 01/07/2023] Open
Abstract
The thymus is the primary organ responsible for de novo generation of immunocompetent T cells that have a diverse repertoire of antigen recognition. During the developmental process, 98% of thymocytes die by apoptosis. Thus apoptosis is a dominant process in the thymus and occurs through either death by neglect or negative selection or through induction by stress/aging. Caspase activation is an essential part of the general apoptosis mechanism, and data suggest that caspases may have a role in negative selection; however, it seems more probable that caspase-8 activation is involved in death by neglect, particularly in glucocorticoid-induced thymocyte apoptosis. Caspase-8 is active in double-positive (DP) thymocytes in vivo and can be activated in vitro in DP thymocytes by T-cell receptor (TCR) crosslinking to induce apoptosis. Caspase-8 is a proapoptotic member of the caspase family and is considered an initiator caspase, which is activated upon stimulation of a death receptor (e.g., Fas), recruitment of the adaptor molecule FADD, and recruitment and subsequent processing of procaspase-8. The main role of caspase-8 seems to be pro-apoptotic and, in this review, we will discuss about the involvement of caspase-8 in (1) TCR-triggered thymic apoptosis; (2) death receptor-mediated thymic apoptosis; and (3) glucocorticoid-induced thymic apoptosis. Regarding TCR triggering, caspase-8 is active in medullary, semi-mature heat-stable antigen(hi) (HAS(hi) SP) thymocytes as a consequence of strong TCR stimulation. The death receptors Fas, FADD, and FLIP are involved upstream of caspase-8 activation in apoptosis; whereas, Bid and HDAC7 are involved downstream of caspase-8. Finally, caspase-8 is involved in glucocortocoid-induced thymocyte apoptosis through an activation loop with the protein GILZ. GILZ activates caspase-8, promoting GILZ sumoylation and its protection from proteasomal degradation.
Collapse
|
37
|
Akazawa Y, Guicciardi ME, Cazanave SC, Bronk SF, Werneburg NW, Kakisaka K, Nakao K, Gores GJ. Degradation of cIAPs contributes to hepatocyte lipoapoptosis. Am J Physiol Gastrointest Liver Physiol 2013; 305:G611-9. [PMID: 24008361 PMCID: PMC3840239 DOI: 10.1152/ajpgi.00111.2013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Hepatocyte apoptosis is a hallmark of nonalcoholic steatohepatitis. We have previously observed that the saturated free fatty acids (FFAs) induce hepatocyte apoptosis in part via a death receptor 5 (DR5)-mediated signaling pathway. Cellular inhibitor of apoptosis protein 1 and 2 (cIAP-1 and cIAP-2) proteins are potent inhibitors of death receptor-mediated apoptosis. However, the role of the cIAPs in FFA-mediated hepatocyte apoptosis is unexplored. Our aim was to determine whether cIAPs are dysregulated during hepatocyte lipoapoptosis. cIAP proteins underwent rapid cellular elimination following treatment with the saturated FFAs palmitate (PA) and stearate. In contrast, PA did not decrease cIAP-1 and cIAP-2 mRNA expression in the cells. Degradation of cIAPs was dependent on their E3-ligase activity, suggesting that cIAPs undergo autoubiquitination that leads to proteasomal degradation. Huh-7 cells stably expressing shRNA targeting cIAP-1, but not cIAP-2, displayed enhanced sensitivity to PA-mediated apoptosis. Incubation with the SMAC mimetic JP1584, which induces rapid degradation of cIAPs, also enhanced PA-mediated apoptosis. Hepatocytes isolated from DR5 knockout mice exhibited reduced apoptosis following treatment with PA plus JP1584, implying that degradation of cIAPs sensitizes to DR5-mediated cell death pathways. A decrease of cIAP-1 was also observed in tissue from patients with nonalcoholic steatohepatitis compared with normal obese subjects. Collectively, these results implicate proteasomal degradation of cIAPs by FFA as a mechanism contributing to hepatocyte lipoapoptosis.
Collapse
Affiliation(s)
- Yuko Akazawa
- Mayo Clinic College of Medicine, 200 First St. SW, Rochester, MN 55905.
| | - Maria Eugenia Guicciardi
- 1Division of Gastroenterology and Hepatology, College of Medicine, Mayo Clinic, Rochester, Minnesota; and
| | - Sophie C. Cazanave
- 1Division of Gastroenterology and Hepatology, College of Medicine, Mayo Clinic, Rochester, Minnesota; and
| | - Steven F. Bronk
- 1Division of Gastroenterology and Hepatology, College of Medicine, Mayo Clinic, Rochester, Minnesota; and
| | - Nathan W. Werneburg
- 1Division of Gastroenterology and Hepatology, College of Medicine, Mayo Clinic, Rochester, Minnesota; and
| | - Keisuke Kakisaka
- 1Division of Gastroenterology and Hepatology, College of Medicine, Mayo Clinic, Rochester, Minnesota; and
| | - Kazuhiko Nakao
- 2Department of Gastroenterology and Hepatology, Nagasaki University School of Medicine, Nagasaki, Japan
| | - Gregory J. Gores
- 1Division of Gastroenterology and Hepatology, College of Medicine, Mayo Clinic, Rochester, Minnesota; and
| |
Collapse
|
38
|
Liposomal temocene (m-THPPo) photodynamic treatment induces cell death by mitochondria-independent apoptosis. Biochim Biophys Acta Gen Subj 2013; 1830:4611-20. [DOI: 10.1016/j.bbagen.2013.05.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 05/14/2013] [Accepted: 05/16/2013] [Indexed: 11/24/2022]
|
39
|
Dubrez L, Berthelet J, Glorian V. IAP proteins as targets for drug development in oncology. Onco Targets Ther 2013; 9:1285-304. [PMID: 24092992 PMCID: PMC3787928 DOI: 10.2147/ott.s33375] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The inhibitors of apoptosis (IAPs) constitute a family of proteins involved in the regulation of
various cellular processes, including cell death, immune and inflammatory responses, cell
proliferation, cell differentiation, and cell motility. There is accumulating evidence supporting
IAP-targeting in tumors: IAPs regulate various cellular processes that contribute to tumor
development, such as cell death, cell proliferation, and cell migration; their expression is
increased in a number of human tumor samples, and IAP overexpression has been correlated with tumor
growth, and poor prognosis or low response to treatment; and IAP expression can be rapidly induced
in response to chemotherapy or radiotherapy because of the presence of an internal ribosome entry
site (IRES)-dependent mechanism of translation initiation, which could contribute to resistance to
antitumor therapy. The development of IAP antagonists is an important challenge and was subject to
intense research over the past decade. Six molecules are currently in clinical trials. This review
focuses on the role of IAPs in tumors and the development of IAP-targeting molecules for anticancer
therapy.
Collapse
Affiliation(s)
- Laurence Dubrez
- Institut National de la Santé et de la Recherche Médicale (Inserm), Dijon, France ; Université de Bourgogne, Dijon, France
| | | | | |
Collapse
|
40
|
Tokar T, Turcan Z, Ulicny J. Boolean network-based model of the Bcl-2 family mediated MOMP regulation. Theor Biol Med Model 2013; 10:40. [PMID: 23767791 PMCID: PMC3716804 DOI: 10.1186/1742-4682-10-40] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Accepted: 05/30/2013] [Indexed: 01/05/2023] Open
Abstract
Background Mitochondrial outer membrane permeabilization (MOMP) is one of the most important points in the majority of apoptotic signaling cascades and it is controlled by a network of interactions between the members of the Bcl-2 family. Methods To understand the role of individual members of this family within the MOMP regulation, we have constructed a Boolean network-based model of interactions between the Bcl-2 proteins. Results Computational simulations have revealed the existence of trapping states which, independently from the incoming stimuli, block the occurrence of MOMP. Our results emphasize the role of the antiapoptotic protein Mcl-1 in the majority of these configurations. We demonstrate here the importance of the Bid and Bim for activation of effectors Bax and Bak, and the irreversibility of this activation. The model further points to the antiapoptotic protein Bcl-w as a key factor preventing Bax activation. Conclusions In spite of relative simplicity, the Boolean network-based model provides useful insight into main functioning logic of the Bcl-2 switch, consistent with experimental findings.
Collapse
Affiliation(s)
- Tomas Tokar
- Department of Biophysics, University of PJ Safarik, Jesenna 5, 04001 Kosice, Slovakia
| | | | | |
Collapse
|
41
|
Aachoui Y, Sagulenko V, Miao EA, Stacey KJ. Inflammasome-mediated pyroptotic and apoptotic cell death, and defense against infection. Curr Opin Microbiol 2013; 16:319-26. [PMID: 23707339 DOI: 10.1016/j.mib.2013.04.004] [Citation(s) in RCA: 213] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 04/11/2013] [Accepted: 04/25/2013] [Indexed: 01/11/2023]
Abstract
Cell death is an effective strategy to limit intracellular infections. Canonical inflammasomes, including NLRP3, NLRC4, and AIM2, recruit and activate caspase-1 in response to a range of microbial stimuli and endogenous danger signals. Caspase-1 then promotes the secretion of IL-1β and IL-18 and a rapid form of lytic programmed cell death termed pyroptosis. A second inflammatory caspase, mouse caspase-11, mediates pyroptotic death through an unknown non-canonical inflammasome system in response to cytosolic bacteria. In addition, recent work shows that inflammasomes can also recruit procaspase-8, initiating apoptosis. The induction of multiple pathways of cell death has probably evolved to counteract microbial evasion of cell death pathways.
Collapse
Affiliation(s)
- Youssef Aachoui
- Department of Microbiology and Immunology and Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | | | | | | |
Collapse
|
42
|
AIM2 and NLRP3 inflammasomes activate both apoptotic and pyroptotic death pathways via ASC. Cell Death Differ 2013; 20:1149-60. [PMID: 23645208 DOI: 10.1038/cdd.2013.37] [Citation(s) in RCA: 364] [Impact Index Per Article: 33.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Revised: 01/30/2013] [Accepted: 03/21/2013] [Indexed: 12/14/2022] Open
Abstract
Inflammasomes are protein complexes assembled upon recognition of infection or cell damage signals, and serve as platforms for clustering and activation of procaspase-1. Oligomerisation of initiating proteins such as AIM2 (absent in melanoma-2) and NLRP3 (NOD-like receptor family, pyrin domain-containing-3) recruits procaspase-1 via the inflammasome adapter molecule ASC (apoptosis-associated speck-like protein containing a CARD). Active caspase-1 is responsible for rapid lytic cell death termed pyroptosis. Here we show that AIM2 and NLRP3 inflammasomes activate caspase-8 and -1, leading to both apoptotic and pyroptotic cell death. The AIM2 inflammasome is activated by cytosolic DNA. The balance between pyroptosis and apoptosis depended upon the amount of DNA, with apoptosis seen at lower transfected DNA concentrations. Pyroptosis had a higher threshold for activation, and dominated at high DNA concentrations because it happens more rapidly. Gene knockdown showed caspase-8 to be the apical caspase in the AIM2- and NLRP3-dependent apoptotic pathways, with little or no requirement for caspase-9. Procaspase-8 localised to ASC inflammasome 'specks' in cells, and bound directly to the pyrin domain of ASC. Thus caspase-8 is an integral part of the inflammasome, and this extends the relevance of the inflammasome to cell types that do not express caspase-1.
Collapse
|
43
|
Di Virgilio F. The Therapeutic Potential of Modifying Inflammasomes and NOD-Like Receptors. Pharmacol Rev 2013; 65:872-905. [DOI: 10.1124/pr.112.006171] [Citation(s) in RCA: 112] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
|
44
|
Hu Q, Wu D, Chen W, Yan Z, Shi Y. Proteolytic processing of the caspase-9 zymogen is required for apoptosome-mediated activation of caspase-9. J Biol Chem 2013; 288:15142-7. [PMID: 23572523 DOI: 10.1074/jbc.m112.441568] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Maturation of the single-chain caspase-9 zymogen through autoproteolytic processing is mediated by the Apaf-1 apoptosome at the onset of apoptosis. Processed caspase-9 and the apoptosome form a holoenzyme with robust proteolytic activity that is 2-3 orders of magnitude higher than that of free processed caspase-9. An unresolved important question is the role of caspase-9 processing, with some experimental data suggesting its dispensability. In this study, we demonstrate that, in contrast to wild-type caspase-9, the unprocessed single-chain caspase-9 triple mutant E306A/D315A/D330A (Casp9-TM) could no longer be adequately activated by the apoptosome. Compared with the protease activity of wild-type caspase-9, that of Casp9-TM in the presence of the apoptosome was drastically reduced. The crippled protease activity of Casp9-TM in the presence of the apoptosome is likely attributable to a markedly reduced ability of Casp9-TM to form homodimers. These data identify an essential role for the autoproteolytic processing of caspase-9 in its activation.
Collapse
Affiliation(s)
- Qi Hu
- Ministry of Education Key Laboratory for Protein Science, Tsinghua-Peking Joint Center for Life Sciences, Center for Structural Biology, School of Life Sciences, and School of Medicine, Tsinghua University, Beijing 100084, USA
| | | | | | | | | |
Collapse
|
45
|
Berthelet J, Dubrez L. Regulation of Apoptosis by Inhibitors of Apoptosis (IAPs). Cells 2013; 2:163-87. [PMID: 24709650 PMCID: PMC3972657 DOI: 10.3390/cells2010163] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 03/04/2013] [Accepted: 03/05/2013] [Indexed: 01/05/2023] Open
Abstract
Abstract Inhibitors of Apoptosis (IAPs) are a family of proteins with various biological functions including regulation of innate immunity and inflammation, cell proliferation, cell migration and apoptosis. They are characterized by the presence of at least one N-terminal baculoviral IAP repeat (BIR) domain involved in protein-protein interaction. Most of them also contain a C-terminal RING domain conferring an E3-ubiquitin ligase activity. In drosophila, IAPs are essential to ensure cell survival, preventing the uncontrolled activation of the apoptotic protease caspases. In mammals, IAPs can also regulate apoptosis through controlling caspase activity and caspase-activating platform formation. Mammalian IAPs, mainly X-linked IAP (XIAP) and cellular IAPs (cIAPs) appeared to be important determinants of the response of cells to endogenous or exogenous cellular injuries, able to convert the survival signal into a cell death-inducing signal. This review highlights the role of IAP in regulating apoptosis in Drosophila and Mammals.
Collapse
Affiliation(s)
- Jean Berthelet
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR866, Dijon F-21079, France.
| | - Laurence Dubrez
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR866, Dijon F-21079, France.
| |
Collapse
|
46
|
Venero JL, Burguillos MA, Joseph B. Caspases playing in the field of neuroinflammation: old and new players. Dev Neurosci 2013; 35:88-101. [PMID: 23445938 DOI: 10.1159/000346155] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Accepted: 10/15/2012] [Indexed: 11/19/2022] Open
Abstract
Neuroinflammation is a complex immune response against the harmful effects of diverse stimuli within the central nervous system. Caspases are a family of intracellular cysteine proteases that mediate proteolytic events indispensable for transduction of signaling pathway-controlling biological phenomena such as apoptosis and inflammation. To date, 14 players have been identified in mammals. For many years, caspases were simply divided into 'apoptotic' and 'proinflammatory' caspases and this classification remains useful to some extent. However, increasing evidence indicates that many of these so-called apoptotic caspases also exert nonapoptotic functions. In addition, the role of certain members of the supposed inflammatory caspases in the inflammatory process per se has also been discussed. In this review, we highlight the role for 'apoptotic' and 'proinflammatory' caspases in the regulation of the inflammation response with a special focus on the central nervous system.
Collapse
Affiliation(s)
- Jose L Venero
- Departamento de Bioquímica y Biología Molecular, Facultad de Farmacia, Universidad de Sevilla, and Instituto de Biomedicina de Sevilla (IBiS), Sevilla, Spain
| | | | | |
Collapse
|
47
|
Yin Y, Pastrana JL, Li X, Huang X, Mallilankaraman K, Choi ET, Madesh M, Wang H, Yang XF. Inflammasomes: sensors of metabolic stresses for vascular inflammation. Front Biosci (Landmark Ed) 2013; 18:638-49. [PMID: 23276949 DOI: 10.2741/4127] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Metabolic syndrome is a major health issue in the western world. An elevated pro-inflammatory state is often found in patients with metabolic diseases such as type 2 diabetes and obesity. Atherosclerosis is one such clinical manifestation of pro-inflammatory state associated with the vasculature. The exact mechanism by which metabolic stress induces this pro-inflammatory status and promotes atherogenesis remained elusive until the discovery of the inflammasome protein complex. This complex is composed of pro-caspase-1 and pathogen sensors. Activation of inflammasome requires the transcriptional upregulation of inflammasome components and the post-translational assembly. Three models of inflammasome assembly have been proposed: 1) the ion channel model; 2) the reactive oxygen species (ROS) model; and 3) the lysosome model. In either case, inflammasome activation triggers the auto-activation of pro-caspase-1 into its mature form. Caspase-1, which was first discovered as the IL-1β converting enzyme, is known to be a major player in inflammatory and cell death pathways. Many endogenous metabolic ligands have been experimentally shown to activate inflammasome, and thus initiate the subsequent inflammation process. Further understanding of the distinct molecular mechanism by which metabolic ligands activates inflammasome could lead to developing novel therapeutic interventions for atherosclerosis and other clinical problems related to metabolic diseases.
Collapse
Affiliation(s)
- Ying Yin
- Department of Pharmacology and Cardiovascular Research Center, Temple University School of Medicine, 3500 North Broad Street, MERB 1059, Philadelphia, PA 19140, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Berke IC, Li Y, Modis Y. Structural basis of innate immune recognition of viral RNA. Cell Microbiol 2012; 15:386-94. [DOI: 10.1111/cmi.12061] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 10/22/2012] [Accepted: 10/24/2012] [Indexed: 12/24/2022]
Affiliation(s)
- Ian C. Berke
- Department of Molecular Biophysics & Biochemistry; Yale University; New Haven; CT; 06520; USA
| | - Yue Li
- Department of Molecular Biophysics & Biochemistry; Yale University; New Haven; CT; 06520; USA
| | - Yorgo Modis
- Department of Molecular Biophysics & Biochemistry; Yale University; New Haven; CT; 06520; USA
| |
Collapse
|
49
|
Berke IC, Yu X, Modis Y, Egelman EH. MDA5 assembles into a polar helical filament on dsRNA. Proc Natl Acad Sci U S A 2012; 109:18437-41. [PMID: 23090998 PMCID: PMC3494895 DOI: 10.1073/pnas.1212186109] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Melanoma differentiation-associated protein 5 (MDA5) detects viral dsRNA in the cytoplasm. On binding of RNA, MDA5 forms polymers, which trigger assembly of the signaling adaptor mitochondrial antiviral-signaling protein (MAVS) into its active fibril form. The molecular mechanism of MDA5 signaling is not well understood, however. Here we show that MDA5 forms helical filaments on dsRNA and report the 3D structure of the filaments using electron microscopy (EM) and image reconstruction. MDA5 assembles into a polar, single-start helix around the RNA. Fitting of an MDA5 homology model into the structure suggests a key role for the MDA5 C-terminal domain in cooperative filament assembly. Our study supports a signal transduction mechanism in which the helical array of MDA5 within filaments nucleates the assembly of MAVS fibrils. We conclude that MDA5 is a polymerization-dependent signaling platform that uses the amyloid-like self-propagating properties of MAVS to amplify signaling.
Collapse
Affiliation(s)
- Ian C. Berke
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520; and
| | - Xiong Yu
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22908
| | - Yorgo Modis
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520; and
| | - Edward H. Egelman
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22908
| |
Collapse
|
50
|
BapE DNA endonuclease induces an apoptotic-like response to DNA damage in Caulobacter. Proc Natl Acad Sci U S A 2012; 109:18096-101. [PMID: 23074244 DOI: 10.1073/pnas.1213332109] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In the presence of extensive DNA damage, eukaryotes activate endonucleases to fragment their chromosomes and induce apoptotic cell death. Apoptotic-like responses have recently been described in bacteria, but primarily in specialized mutant backgrounds, and the factors responsible for DNA damage-induced chromosome fragmentation and death have not been identified. Here we find that wild-type Caulobacter cells induce apoptotic-like cell death in response to extensive DNA damage. The bacterial apoptosis endonuclease (BapE) protein is induced by damage but not involved in DNA repair itself, and mediates this cell fate decision. BapE fragments chromosomes by cleaving supercoiled DNA in a sequence-nonspecific manner, thereby perturbing chromosome integrity both in vivo and in vitro. This damage-induced chromosome fragmentation pathway resembles that of eukaryotic apoptosis. We propose that damage-induced programmed cell death can be a primary stress response for some bacterial species, providing isogenic bacterial communities with advantages similar to those that apoptosis provides to multicellular organisms.
Collapse
|