1
|
Xia D, Wang S, Yao R, Han Y, Zheng L, He P, Liu Y, Yang L. Pyroptosis in sepsis: Comprehensive analysis of research hotspots and core genes in 2022. Front Mol Biosci 2022; 9:955991. [PMID: 36032662 PMCID: PMC9402944 DOI: 10.3389/fmolb.2022.955991] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Accepted: 07/15/2022] [Indexed: 12/02/2022] Open
Abstract
Sepsis, a life-threatening disease caused by dysregulated host response to infection, is a major public health problem with a high mortality and morbidity rate. Pyroptosis is a new type of programmed cell death discovered in recent years, which has been proved to play an important role in sepsis. Nevertheless, there is no comprehensive report, which can help researchers get a quick overview and find research hotspots. Thus, we aimed to identify the study status and knowledge structures of pyroptosis in sepsis and summarize the key mechanism of pyroptosis in sepsis. The data were retrieved and downloaded from the WOS database. Software such as VOSviewer was used to analyze these publications. Key genes were picked out by using (https://www.genecards.org) and (http://www.bioinformatics.com). Then, Gene Ontology (GO) enrichment analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis were used to performed these key genes. From 2011 to 2021, a total of 299 papers met the search criteria, and the global interest in pyroptosis in sepsis measured by the value of (RRI) has started to increase since 2016. China ranked first in the number of publications, followed by the USA. The journal Frontiers in Immunology published the most relevant articles. Through keyword co-occurrence analysis, the high-frequency subject terms were divided into three clusters like “animal research”, “cell research,” and “molecular research” clusters. “mir,” “aki,” “monocyte,” and “neutrophil” were the newest keywords that may be the hotspot. In addition, a total of 15 genes were identified as hub genes. TNF, IL-1β, AKT1, CASP1, and STAT3 were highly expressed in lung tissues, thymus tissues, and lymphocytes. KEGG analysis indicated that pyroptosis may play a vital role in sepsis via the NOD, PI3K/AKT, and MAPK/JNK pathways. Through the quantitative analysis of the literature on pyroptosis in sepsis, we revealed the current status and hotspots of research in this field and provided some guidance for further studies.
Collapse
Affiliation(s)
- Demeng Xia
- Luodian Clinical Drug Research Center, Shanghai Baoshan Luodian Hospital, Shanghai University, Shanghai, China
| | - Sheng Wang
- Department of Emergency, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Renqi Yao
- Translational Medicine Research Center, Fourth Medical Center and Medical Innovation Research Division of the Chinese PLA General Hospital, Beijing, China
| | - Yuexue Han
- Department of Clinical Medicine, Qing Dao University, Qing Dao, Shan Dong, China
| | - Liyu Zheng
- Translational Medicine Research Center, Fourth Medical Center and Medical Innovation Research Division of the Chinese PLA General Hospital, Beijing, China
| | - Pengyi He
- Translational Medicine Research Center, Fourth Medical Center and Medical Innovation Research Division of the Chinese PLA General Hospital, Beijing, China
| | - Ying Liu
- Institute of Translational Medicine, Shanghai University, Shanghai, China
- *Correspondence: Ying Liu, ; Lu Yang,
| | - Lu Yang
- Clinical Research Center, Shanghai Baoshan Luodian Hospital, Shanghai University, Shanghai, China
- *Correspondence: Ying Liu, ; Lu Yang,
| |
Collapse
|
2
|
Lorente L, Martín MM, Ortiz-López R, González-Rivero AF, Pérez-Cejas A, Martín M, Gonzalez V, Pérez A, Rodin M, Jiménez A. Blood caspase-8 concentrations and mortality among septic patients. Med Intensiva 2022; 46:8-13. [PMID: 34991877 DOI: 10.1016/j.medine.2020.06.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 06/27/2020] [Indexed: 06/14/2023]
Abstract
OBJECTIVE No data are available on blood caspase-8 concentrations (the initiator caspase in the extrinsic apoptosis pathway) in septic patients. The present study thus describes the blood caspase-8 concentrations in survivors and non-survivors, and examines the possible association between blood caspase-8 concentrations and mortality in septic patients. DESIGN A prospective observational study was carried out. SETTING Three Spanish Intensive Care Units. PATIENTS Septic patients. INTERVENTIONS Serum caspase-8 concentrations were determined at the diagnosis of sepsis. MAIN VARIABLE OF INTEREST Mortality after 30 days. RESULTS Patients not surviving at day 30 (n=81) compared to surviving patients (n=140) showed higher serum caspase-8 levels (p<0.001). Multiple logistic regression analysis found an association between serum caspase-8 levels>43.5ng/ml and mortality (OR=3.306; 95%CI=1.619-6.753; p=0.001). The area under the curve (AUC) for mortality predicted by serum caspase-8 levels was 67% (95% CI=60-73%; p<0.001). CONCLUSIONS The novel findings of our study were that blood caspase-8 concentrations are higher in non-survivors than in survivors, and that there is an association between blood caspase-8 concentrations and mortality in septic patients.
Collapse
Affiliation(s)
- L Lorente
- Intensive Care Unit, Hospital Universitario de Canarias, Ofra, s/n., La Laguna 38320, Tenerife, Spain.
| | - M M Martín
- Intensive Care Unit, Hospital Universitario Nuestra Señora Candelaria, Crta Rosario s/n., Santa Cruz Tenerife 38010, Spain
| | - R Ortiz-López
- Intensive Care Unit, Hospital General de La Palma, Buenavista de Arriba s/n, Breña Alta, La Palma 38713, Spain
| | - A F González-Rivero
- Laboratory Department, Hospital Universitario de Canarias, Ofra, s/n., La Laguna 38320, Santa Cruz de Tenerife, Spain
| | - A Pérez-Cejas
- Laboratory Department, Hospital Universitario de Canarias, Ofra, s/n., La Laguna 38320, Tenerife, Spain
| | - M Martín
- Intensive Care Unit, Hospital Universitario de Canarias, Ofra s/n., La Laguna, Santa Cruz de Tenerife 38320, Spain
| | - V Gonzalez
- Intensive Care Unit, Hospital Universitario de Canarias, Ofra s/n., La Laguna, Santa Cruz de Tenerife 38320, Spain
| | - A Pérez
- Intensive Care Unit, Hospital Universitario de Canarias, Ofra s/n., La Laguna, Santa Cruz de Tenerife 38320, Spain
| | - M Rodin
- Intensive Care Unit, Hospital Universitario de Canarias, Ofra s/n., La Laguna, Santa Cruz de Tenerife 38320, Spain
| | - A Jiménez
- Research Unit, Hospital Universitario de Canarias, Ofra, s/n., La Laguna 38320, Tenerife, Spain
| |
Collapse
|
3
|
Mortality prediction of septic patients by blood caspase-8 levels. Diagn Microbiol Infect Dis 2022; 102:115639. [DOI: 10.1016/j.diagmicrobio.2022.115639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 01/07/2022] [Accepted: 01/16/2022] [Indexed: 11/21/2022]
|
4
|
Kim YH, Hwang JS, Yoon IN, Lee JH, Lee J, Park KC, Seok H, Kim H. The insect peptide CopA3 blocks programmed cell death by directly binding caspases and inhibiting their proteolytic activation. Biochem Biophys Res Commun 2021; 547:82-88. [PMID: 33610044 DOI: 10.1016/j.bbrc.2021.01.107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 01/28/2021] [Indexed: 11/29/2022]
Abstract
Caspases play essential roles in apoptotic processes, which is necessary for cellular homeostasis. However, over-activation of caspases and subsequent excessive apoptosis is considered a main cause of Parkinson's disease and liver diseases. Here, we found that the insect-derived peptide, CopA3, which has shown antiapoptotic effects in many apoptosis models, directly binds to caspases. The resulting complexes do not dissociate during denaturing polyacrylamide gel electrophoresis, as evidenced by a distinct shift in the migration of caspase reflecting an increase in their molecular weight. Surface plasmon resonance and experiment using cysteine-substituted mutants of CopA3 collectively revealed that binding of CopA3 to caspases is dependent on an internal cysteine residue. Notably, CopA3 binding significantly inhibited proteolytic activation of downstream caspases by upstream caspases. In summary, the demonstration that CopA3 directly binds to caspases and inhibits their activating cleavage suggests a possible therapeutic approach for treating human diseases resulting from uncontrolled apoptosis.
Collapse
Affiliation(s)
- Young Ha Kim
- Department of Life Science, College of Natural Science, Daejin University, Pocheon, Gyeonggido, 487-711, Republic of Korea
| | - Jae Sam Hwang
- Department of Agricultural Biology, National Academy of Agricultural Science, RDA, Suwon, 441-707, Republic of Korea
| | - I Na Yoon
- Department of Life Science, College of Natural Science, Daejin University, Pocheon, Gyeonggido, 487-711, Republic of Korea
| | - Joon Ha Lee
- Department of Agricultural Biology, National Academy of Agricultural Science, RDA, Suwon, 441-707, Republic of Korea
| | - Junguee Lee
- Department of Pathology, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Daeheung-ro 64, Jung-gu, Daejeon, 301-723, Republic of Korea
| | - Ki Cheol Park
- Clinical Research Institute, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Daejeon, Republic of Korea
| | - Heon Seok
- Korea Brain Bank, Korea Brain Research Institute, Daegu, 41062, Republic of Korea
| | - Ho Kim
- Department of Life Science, College of Natural Science, Daejin University, Pocheon, Gyeonggido, 487-711, Republic of Korea.
| |
Collapse
|
5
|
Soare AY, Freeman TL, Min AK, Malik HS, Osota EO, Swartz TH. P2RX7 at the Host-Pathogen Interface of Infectious Diseases. Microbiol Mol Biol Rev 2021; 85:e00055-20. [PMID: 33441488 PMCID: PMC7849353 DOI: 10.1128/mmbr.00055-20] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The P2X7 receptor (P2RX7) is an important molecule that functions as a danger sensor, detecting extracellular nucleotides from injured cells and thus signaling an inflammatory program to nearby cells. It is expressed in immune cells and plays important roles in pathogen surveillance and cell-mediated responses to infectious organisms. There is an abundance of literature on the role of P2RX7 in inflammatory diseases and the role of these receptors in host-pathogen interactions. Here, we describe the current knowledge of the role of P2RX7 in the host response to a variety of pathogens, including viruses, bacteria, fungi, protozoa, and helminths. We describe in vitro and in vivo evidence for the critical role these receptors play in mediating and modulating immune responses. Our observations indicate a role for P2X7 signaling in sensing damage-associated molecular patterns released by nearby infected cells to facilitate immunopathology or protection. In this review, we describe how P2RX7 signaling can play critical roles in numerous cells types in response to a diverse array of pathogens in mediating pathogenesis and immunity to infectious agents.
Collapse
Affiliation(s)
- Alexandra Y Soare
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, USA
- Division of Infectious Diseases, Department of Medicine, Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Tracey L Freeman
- Division of Infectious Diseases, Department of Medicine, Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Alice K Min
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Hagerah S Malik
- University of Chicago Pritzker School of Medicine, Chicago, Illinois, USA
| | - Elizabeth O Osota
- University of California San Diego, Graduate School of Biomedical Sciences, San Diego, California, USA
| | - Talia H Swartz
- Division of Infectious Diseases, Department of Medicine, Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| |
Collapse
|
6
|
The necroptotic cell death pathway operates in megakaryocytes, but not in platelet synthesis. Cell Death Dis 2021; 12:133. [PMID: 33510145 PMCID: PMC7843594 DOI: 10.1038/s41419-021-03418-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 01/06/2021] [Accepted: 01/08/2021] [Indexed: 02/06/2023]
Abstract
Necroptosis is a pro-inflammatory cell death program executed by the terminal effector, mixed lineage kinase domain-like (MLKL). Previous studies suggested a role for the necroptotic machinery in platelets, where loss of MLKL or its upstream regulator, RIPK3 kinase, impacted thrombosis and haemostasis. However, it remains unknown whether necroptosis operates within megakaryocytes, the progenitors of platelets, and whether necroptotic cell death might contribute to or diminish platelet production. Here, we demonstrate that megakaryocytes possess a functional necroptosis signalling cascade. Necroptosis activation leads to phosphorylation of MLKL, loss of viability and cell swelling. Analyses at steady state and post antibody-mediated thrombocytopenia revealed that platelet production was normal in the absence of MLKL, however, platelet activation and haemostasis were impaired with prolonged tail re-bleeding times. We conclude that MLKL plays a role in regulating platelet function and haemostasis and that necroptosis signalling in megakaryocytes is dispensable for platelet production.
Collapse
|
7
|
Lorente L, Martín MM, Ortiz-López R, González-Rivero AF, Pérez-Cejas A, Martín M, Gonzalez V, Pérez A, Rodin M, Jiménez A. Blood caspase-8 concentrations and mortality among septic patients. Med Intensiva 2020; 46:S0210-5691(20)30246-1. [PMID: 32843190 DOI: 10.1016/j.medin.2020.06.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 06/23/2020] [Accepted: 06/27/2020] [Indexed: 12/29/2022]
Abstract
OBJECTIVE No data are available on blood caspase-8 concentrations (the initiator caspase in the extrinsic apoptosis pathway) in septic patients. The present study thus describes the blood caspase-8 concentrations in survivors and non-survivors, and examines the possible association between blood caspase-8 concentrations and mortality in septic patients. DESIGN A prospective observational study was carried out. SETTING Three Spanish Intensive Care Units. PATIENTS Septic patients. INTERVENTIONS Serum caspase-8 concentrations were determined at the diagnosis of sepsis. MAIN VARIABLE OF INTEREST Mortality after 30 days. RESULTS Patients not surviving at day 30 (n=81) compared to surviving patients (n=140) showed higher serum caspase-8 levels (p<0.001). Multiple logistic regression analysis found an association between serum caspase-8 levels>43.5ng/ml and mortality (OR=3.306; 95%CI=1.619-6.753; p=0.001). The area under the curve (AUC) for mortality predicted by serum caspase-8 levels was 67% (95% CI=60-73%; p<0.001). CONCLUSIONS The novel findings of our study were that blood caspase-8 concentrations are higher in non-survivors than in survivors, and that there is an association between blood caspase-8 concentrations and mortality in septic patients.
Collapse
Affiliation(s)
- L Lorente
- Intensive Care Unit, Hospital Universitario de Canarias, Ofra, s/n., La Laguna 38320, Tenerife, Spain.
| | - M M Martín
- Intensive Care Unit, Hospital Universitario Nuestra Señora Candelaria, Crta Rosario s/n., Santa Cruz Tenerife 38010, Spain
| | - R Ortiz-López
- Intensive Care Unit, Hospital General de La Palma, Buenavista de Arriba s/n, Breña Alta, La Palma 38713, Spain
| | - A F González-Rivero
- Laboratory Department, Hospital Universitario de Canarias, Ofra, s/n., La Laguna 38320, Santa Cruz de Tenerife, Spain
| | - A Pérez-Cejas
- Laboratory Department, Hospital Universitario de Canarias, Ofra, s/n., La Laguna 38320, Tenerife, Spain
| | - M Martín
- Intensive Care Unit, Hospital Universitario de Canarias, Ofra s/n., La Laguna, Santa Cruz de Tenerife 38320, Spain
| | - V Gonzalez
- Intensive Care Unit, Hospital Universitario de Canarias, Ofra s/n., La Laguna, Santa Cruz de Tenerife 38320, Spain
| | - A Pérez
- Intensive Care Unit, Hospital Universitario de Canarias, Ofra s/n., La Laguna, Santa Cruz de Tenerife 38320, Spain
| | - M Rodin
- Intensive Care Unit, Hospital Universitario de Canarias, Ofra s/n., La Laguna, Santa Cruz de Tenerife 38320, Spain
| | - A Jiménez
- Research Unit, Hospital Universitario de Canarias, Ofra, s/n., La Laguna 38320, Tenerife, Spain
| |
Collapse
|
8
|
Abstract
Arthropod-borne viral diseases caused by dengue virus (DENV) are major re-emerging public health problem worldwide. In spite of intense research, DENV pathogenesis is not fully understood and remains enigmatic; however, current evidence suggests that dengue progression is associated with an inflammatory response, mainly in patients suffering from a second DENV infection. Monocytes are one of the main target cells of DENV infection and play an important role in pathogenesis since they are known to produce several inflammatory cytokines that can lead to endothelial dysfunction and therefore vascular leak. In addition, monocytes play an important role in antibody dependent enhancement, infection with consequences in viral load and immune response. Despite the physiological functions of monocytes in immune response, their life span in the bloodstream is very short, and activation of monocytes by DENV infection can trigger different types of cell death. For example, DENV can induce apoptosis in monocytes related with the production of Tumor necrosis factor alpha (TNF-α). Additionally, recent studies have shown that DENV-infected monocytes also exhibit a cell death process mediated by caspase-1 activation together with IL-1 production, referred to as pyroptosis. Taken together, the aforementioned studies strongly depict that multiple cell death pathways may be occurring in monocytes upon DENV-2 infection. This review provides insight into mechanisms of DENV-induced death of both monocytes and other cell types for a better understanding of this process. Further knowledge in cell death induced by DENV will help in the developing novel strategies to prevent disease progression.
Collapse
|
9
|
Xia Y, Chen S, Zhu G, Huang R, Yin Y, Ren W. Betaine Inhibits Interleukin-1β Production and Release: Potential Mechanisms. Front Immunol 2018; 9:2670. [PMID: 30515160 PMCID: PMC6255979 DOI: 10.3389/fimmu.2018.02670] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Accepted: 10/29/2018] [Indexed: 12/25/2022] Open
Abstract
Betaine is a critical nutrient for mammal health, and has been found to alleviate inflammation by lowering interleukin (IL)-1β secretion; however, the underlying mechanisms by which betaine inhibits IL-1β secretion remain to be uncovered. In this review, we summarize the current understanding about the mechanisms of betaine in IL-1β production and release. For IL-1β production, betaine affects canonical and non-canonical inflammasome-mediated processing of IL-1β through signaling pathways, such as NF-κB, NLRP3 and caspase-8/11. For IL-1β release, betaine inhibits IL-1β release through blocking the exocytosis of IL-1β-containing secretory lysosomes, reducing the shedding of IL-1β-containing plasma membrane microvesicles, suppressing the exocytosis of IL-1β-containing exosomes, and attenuating the passive efflux of IL-1β across hyperpermeable plasma membrane during pyroptotic cell death, which are associated with ERK1/2/PLA2 and caspase-8/A-SMase signaling pathways. Collectively, this review highlights the anti-inflammatory property of betaine by inhibiting the production and release of IL-1β, and indicates the potential application of betaine supplementation as an adjuvant therapy in various inflammatory diseases associating with IL-1β secretion.
Collapse
Affiliation(s)
- Yaoyao Xia
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, China.,University of Chinese Academy of Sciences, Beijing, China.,Laboratory of Animal Nutrition and Health and Key Laboratory of Agro-Ecology, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Shuai Chen
- University of Chinese Academy of Sciences, Beijing, China.,Laboratory of Animal Nutrition and Health and Key Laboratory of Agro-Ecology, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Guoqiang Zhu
- Jiangsu Co-Innovation Center for Important Animal Infectious Diseases and Zoo Noses, Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, College of Veterinary Medicine, Yangzhou University, Yangzhou, China
| | - Ruilin Huang
- Laboratory of Animal Nutrition and Health and Key Laboratory of Agro-Ecology, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Yulong Yin
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, China.,Laboratory of Animal Nutrition and Health and Key Laboratory of Agro-Ecology, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China.,Academics Working Station at The First Affiliated Hospital, Changsha Medical University, Changsha, China
| | - Wenkai Ren
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, China.,Jiangsu Co-Innovation Center for Important Animal Infectious Diseases and Zoo Noses, Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, College of Veterinary Medicine, Yangzhou University, Yangzhou, China
| |
Collapse
|
10
|
Dysregulated myelopoiesis and hematopoietic function following acute physiologic insult. Curr Opin Hematol 2018; 25:37-43. [PMID: 29035909 DOI: 10.1097/moh.0000000000000395] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
PURPOSE OF REVIEW The purpose of this review is to describe recent findings in the context of previous work regarding dysregulated myelopoiesis and hematopoietic function following an acute physiologic insult, focusing on the expansion and persistence of myeloid-deriver suppressor cells, the deterioration of lymphocyte number and function, and the inadequacy of stress erythropoiesis. RECENT FINDINGS Persistent myeloid-derived suppressor cell (MDSC) expansion among critically ill septic patients is associated with T-cell suppression, vulnerability to nosocomial infection, chronic critical illness, and poor long-term functional status. Multiple approaches targeting MDSC expansion and suppressor cell activity may serve as a primary or adjunctive therapeutic intervention. Traumatic injury and the neuroendocrine stress response suppress bone marrow erythropoietin receptor expression in a process that may be reversed by nonselective beta-adrenergic receptor blockade. Hepcidin-mediated iron-restricted anemia of critical illness requires further investigation of novel approaches involving erythropoiesis-stimulating agents, iron administration, and hepcidin modulation. SUMMARY Emergency myelopoiesis is a dynamic process with unique phenotypes for different physiologic insults and host factors. Following an acute physiologic insult, critically ill patients are subject to persistent MDSC expansion, deterioration of lymphocyte number and function, and inadequate stress erythropoiesis. Better strategies are required to identify patients who are most likely to benefit from targeted therapies.
Collapse
|
11
|
NLRP3 Inflammasome Is Involved in Q-VD-OPH Induced Necroptosis Following Cerebral Ischemia-Reperfusion Injury. Neurochem Res 2018; 43:1200-1209. [DOI: 10.1007/s11064-018-2537-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 03/16/2018] [Accepted: 04/19/2018] [Indexed: 02/02/2023]
|
12
|
Greve AS, Skals M, Fagerberg SK, Tonnus W, Ellermann-Eriksen S, Evans RJ, Linkermann A, Praetorius HA. P2X 1, P2X 4, and P2X 7 Receptor Knock Out Mice Expose Differential Outcome of Sepsis Induced by α-Haemolysin Producing Escherichia coli. Front Cell Infect Microbiol 2017; 7:113. [PMID: 28428949 PMCID: PMC5382212 DOI: 10.3389/fcimb.2017.00113] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 03/21/2017] [Indexed: 11/13/2022] Open
Abstract
α-haemolysin (HlyA)-producing Escherichia coli commonly inflict severe urinary tract infections, including pyelonephritis, which comprises substantial risk for sepsis. In vitro, the cytolytic effect of HlyA is mainly mediated by ATP release through the HlyA pore and subsequent P2X1/P2X7 receptor activation. This amplification of the lytic process is not unique to HlyA but is observed by many other pore-forming proteins including complement-induced haemolysis. Since free hemoglobin in the blood is known to be associated with a worse outcome in sepsis one could speculate that inhibition of P2X receptors would ameliorate the course of sepsis. Surprisingly, this study demonstrates that [Formula: see text] and [Formula: see text] mice are exceedingly sensitive to sepsis with uropathogenic E. coli. These mice have markedly lower survival, higher cytokine levels and activated intravascular coagulation. Quite the reverse is seen in [Formula: see text] mice, which had markedly lower cytokine levels and less coagulation activation compared to controls after exposure to uropathogenic E. coli. The high cytokine levels in the [Formula: see text] mouse are unexpected, since P2X7 is implicated in caspase-1-dependent IL-1β production. Here, we demonstrate that IL-1β production during sepsis with uropathogenic E. coli is mediated by caspase-8, since caspase-8 and RIPK3 double knock out mice show substantially lower cytokine during sepsis and increased survival after injection of TNFα. These data support that P2X7 and P2X4 receptor activation has a protective effect during severe E. coli infection.
Collapse
Affiliation(s)
| | - Marianne Skals
- Department of Biomedicine, Aarhus UniversityAarhus, Denmark.,Department of Clinical Microbiology, Aarhus University HospitalAarhus, Denmark
| | | | - Wulf Tonnus
- Division of Nephrology, Medical Clinic III, University Hospital Carl Gustav Carus DresdenDresden, Germany
| | | | - Richard J Evans
- Department of Molecular and Cell Biology, University of LeicesterLeicester, UK
| | - Andreas Linkermann
- Division of Nephrology, Medical Clinic III, University Hospital Carl Gustav Carus DresdenDresden, Germany
| | | |
Collapse
|
13
|
Koifman N, Biran I, Aharon A, Brenner B, Talmon Y. A direct-imaging cryo-EM study of shedding extracellular vesicles from leukemic monocytes. J Struct Biol 2017; 198:177-185. [PMID: 28254382 DOI: 10.1016/j.jsb.2017.02.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 02/09/2017] [Accepted: 02/14/2017] [Indexed: 02/08/2023]
Abstract
The human leukemia monocytic cell line (THP-1) is known to shed extracellular vesicles (EVs) under various stimulations. We studied the effects of two types of common stimulation types, lipopolysaccharide (LPS) and starvation conditions by high resolution cryogenic electron microscopy, namely, cryo-SEM and cryo-TEM. Cryo-SEM data of cells undergoing EV blebbing and shedding is presented here for the first time. The high-resolution images show good agreement with models describing the membrane processes of shedding. Cells that underwent a 48-h starvation treatment exhibited differing morphological features, including shrunken nucleus and elongated membrane protrusions. LPS treated cells, however, showed extensive blebbing originating from the cell membrane, in good agreement with the sizes of EVs imaged by cryo-TEM. EVs isolated from both types of stimulations were measured by nanoparticle tracking analysis (NanoSight), by which LPS-EVs samples exhibited higher concentration and smaller mean diameter, as compared to starvation-EVs. Our results suggest a difference in the effects of the two stimulation types on the shedding process and possibly on the type of EVs shed. Our unique methodologies provide an important and innovative outlook of the shedding process and on its products, paving the way to further discoveries in this developing field of research, in which much is still unknown.
Collapse
Affiliation(s)
- Na'ama Koifman
- Department of Chemical Engineering and the Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Idan Biran
- Department of Chemical Engineering and the Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Anat Aharon
- The Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 3525433, Israel; Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa 3109601, Israel
| | - Benjamin Brenner
- The Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 3525433, Israel; Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa 3109601, Israel
| | - Yeshayahu Talmon
- Department of Chemical Engineering and the Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
| |
Collapse
|
14
|
Mytych J, Wos I, Solek P, Koziorowski M. Protective role of klotho protein on epithelial cells upon co-culture with activated or senescent monocytes. Exp Cell Res 2016; 350:358-367. [PMID: 28011195 DOI: 10.1016/j.yexcr.2016.12.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 12/13/2016] [Accepted: 12/20/2016] [Indexed: 12/13/2022]
Abstract
Monocytes ensure proper functioning and maintenance of epithelial cells, while good condition of monocytes is a key factor of these interactions. Although, it was shown that in some circumstances, a population of altered monocytes may appear, there is no data regarding their effect on epithelial cells. In this study, using direct co-culture model with LPS-activated and Dox-induced senescent THP-1 monocytes, we reported for the first time ROS-induced DNA damage, reduced metabolic activity, proliferation inhibition and cell cycle arrest followed by p16-, p21- and p27-mediated DNA damage response pathways activation, premature senescence and apoptosis induction in HeLa cells. Also, we show that klotho protein possessing anti-aging and anti-inflammatory characteristics reduced cytotoxic and genotoxic events by inhibition of insulin/IGF-IR and downregulation of TRF1 and TRF2 proteins. Therefore, klotho protein could be considered as a protective factor against changes caused by altered monocytes in epithelial cells.
Collapse
Affiliation(s)
- Jennifer Mytych
- Institute of Applied Biotechnology and Basic Sciences, University of Rzeszow, Werynia 502, 36-100 Kolbuszowa, Poland; Centre of Applied Biotechnology and Basic Sciences, University of Rzeszow, Werynia 502, 36-100 Kolbuszowa, Poland.
| | - Izabela Wos
- Institute of Applied Biotechnology and Basic Sciences, University of Rzeszow, Werynia 502, 36-100 Kolbuszowa, Poland; Centre of Applied Biotechnology and Basic Sciences, University of Rzeszow, Werynia 502, 36-100 Kolbuszowa, Poland
| | - Przemyslaw Solek
- Institute of Applied Biotechnology and Basic Sciences, University of Rzeszow, Werynia 502, 36-100 Kolbuszowa, Poland; Centre of Applied Biotechnology and Basic Sciences, University of Rzeszow, Werynia 502, 36-100 Kolbuszowa, Poland
| | - Marek Koziorowski
- Institute of Applied Biotechnology and Basic Sciences, University of Rzeszow, Werynia 502, 36-100 Kolbuszowa, Poland; Centre of Applied Biotechnology and Basic Sciences, University of Rzeszow, Werynia 502, 36-100 Kolbuszowa, Poland
| |
Collapse
|
15
|
Rodhe J, Burguillos MA, de Pablos RM, Kavanagh E, Persson A, Englund E, Deierborg T, Venero JL, Joseph B. Spatio-temporal activation of caspase-8 in myeloid cells upon ischemic stroke. Acta Neuropathol Commun 2016; 4:92. [PMID: 27566702 PMCID: PMC5002214 DOI: 10.1186/s40478-016-0365-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 08/11/2016] [Indexed: 12/16/2022] Open
Abstract
Ischemic stroke (caused by thrombosis, embolism or vasoconstriction) lead to the recruitment and activation of immune cells including resident microglia and infiltrating peripheral macrophages, which contribute to an inflammatory response involved in regulation of the neuronal damage. We showed earlier that upon pro-inflammatory stimuli, the orderly activation of caspase-8 and caspase-3/7 regulates microglia activation through a protein kinase C-δ dependent pathway. Here, we present in vivo evidence for the activation of caspase-8 and caspase-3 in microglia/macrophages in post-mortem tissue from human ischemic stroke subjects. Indeed, CD68-positive microglia/macrophages in the ischemic peri-infarct area exhibited significant expression of the cleaved and active form of caspase-8 and caspase-3. The temporal and spatial activation of caspase-8 was further investigated in a permanent middle cerebral artery occlusion mouse model of ischemic stroke. Increasing levels of active caspase-8 was found in Iba1-positive cells over time in the peri-infarct area, at 6, 24 and 48 h after artery occlusion. Analysis of post-mortem brain tissue from human subject who suffered two stroke events, referred as recent and old stroke, revealed that expression of cleaved caspase-8 and -3 in CD68-positive cells could only be found in the recent stroke area. Analysis of cleaved caspase-8 and -3 expressions in a panel of human stroke cases arranged upon days-after stroke and age-matched controls suggested that the expression of these caspases correlated with the time of onset of stroke. Collectively, these data illustrate the temporal and spatial activation of caspase-8 and -3 in microglia/macrophages occurring upon ischemic stroke and suggest that the expression of these caspases could be used in neuropathological diagnostic work.
Collapse
|