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Wu J, Shyy M, Shyy JYJ, Xiao H. Role of inflammasomes in endothelial dysfunction. Br J Pharmacol 2024. [PMID: 38952037 DOI: 10.1111/bph.16479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 03/14/2024] [Accepted: 05/04/2024] [Indexed: 07/03/2024] Open
Abstract
The vascular endothelium dynamically responds to environmental cues and plays a pivotal role in maintaining vascular homeostasis by regulating vasomotor tone, blood cell trafficking, permeability and immune responses. However, endothelial dysfunction results in various pathological conditions. Inflammasomes are large intracellular multimeric complexes activated by pathogens or cellular damage. Inflammasomes in vascular endothelial cells (ECs) initiate innate immune responses, which have emerged as significant mediators in endothelial dysfunction, contributing to the pathophysiology of an array of diseases. This review summarizes the mechanisms and ramifications of inflammasomes in ECs and related vascular diseases such as atherosclerosis, abdominal aortic aneurysm, stroke, and lung and kidney diseases. We also discuss potential drugs targeting EC inflammasomes and their applications in treating vascular diseases.
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Affiliation(s)
- Jimin Wu
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, Beijing, China
- State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, China
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, China
- Research Unit of Medical Science Research Management/Basic and Clinical Research of Metabolic Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, China
- Haihe Laboratory of Cell Ecosystem, Beijing, China
| | - Melody Shyy
- Biological Sciences, University of California, Santa Barbara, Santa Barbara, California, USA
| | - John Y-J Shyy
- Division of Cardiology, Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | - Han Xiao
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, Beijing, China
- State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, China
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, China
- Research Unit of Medical Science Research Management/Basic and Clinical Research of Metabolic Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, China
- Haihe Laboratory of Cell Ecosystem, Beijing, China
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Li L, Wang J, Zhong X, Jiang Y, Pei G, Yang X, Zhang K, Shen S, Jin X, Sun G, Su C, Chen S, Yin H. ADP-Hep-Induced Liquid Phase Condensation of TIFA-TRAF6 Activates ALPK1/TIFA-Dependent Innate Immune Responses. RESEARCH (WASHINGTON, D.C.) 2024; 7:0315. [PMID: 38357697 PMCID: PMC10865109 DOI: 10.34133/research.0315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 01/19/2024] [Indexed: 02/16/2024]
Abstract
The ALPK1 (alpha-kinase 1)-TIFA (TRAF-interacting protein with fork head-associated domain)-TRAF6 signaling pathway plays a pivotal role in regulating inflammatory processes, with TIFA and TRAF6 serving as key molecules in this cascade. Despite its significance, the functional mechanism of TIFA-TRAF6 remains incompletely understood. In this study, we unveil that TIFA undergoes liquid-liquid phase separation (LLPS) induced by ALPK1 in response to adenosine diphosphate (ADP)-β-D-manno-heptose (ADP-Hep) recognition. The phase separation of TIFA is primarily driven by ALPK1, the pT9-FHA domain, and the intrinsically disordered region segment. Simultaneously, TRAF6 exhibits phase separation during ADP-Hep-induced inflammation, a phenomenon observed consistently across various inflammatory signal pathways. Moreover, TRAF6 is recruited within the TIFA condensates, facilitating lysine (K) 63-linked polyubiquitin chain synthesis. The subsequent recruitment, enrichment, and activation of downstream effectors within these condensates contribute to robust inflammatory signal transduction. Utilizing a novel chemical probe (compound 22), our analysis demonstrates that the activation of the ALPK1-TIFA-TRAF6 signaling pathway in response to small molecules necessitates the phase separation of TIFA. In summary, our findings reveal TIFA as a sensor for upstream signals, initiating the LLPS of itself and downstream proteins. This process results in the formation of membraneless condensates within the ALPK1-TIFA-TRAF6 pathway, suggesting potential applications in therapeutic biotechnology development.
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Affiliation(s)
- Liping Li
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
- Department of Cancer Research, Institute of Medicinal Biotechnology,
Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Jia Wang
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
- State Key Laboratory of Membrane Biology, Institute of Molecular Medicine, College of Future Technology,
Peking University, Beijing, China
| | - Xincheng Zhong
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Yaoyao Jiang
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Gaofeng Pei
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
- School of Life Sciences,
Tsinghua University, Beijing, 100084, China
| | - Xikang Yang
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Kaixiang Zhang
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Siqi Shen
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Xue Jin
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Gaoge Sun
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Chaofei Su
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Shuzhen Chen
- Department of Cancer Research, Institute of Medicinal Biotechnology,
Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Hang Yin
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
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Guo X, Qiao G, Wang J, Yang C, Zhao M, Zhang Q, Wan Y. TIFA contributes to periodontitis in diabetic mice via activating the NF‑κB signaling pathway. Mol Med Rep 2024; 29:23. [PMID: 38099344 PMCID: PMC10784739 DOI: 10.3892/mmr.2023.13146] [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: 05/31/2023] [Accepted: 11/08/2023] [Indexed: 12/18/2023] Open
Abstract
Diabetic periodontitis (DP) refers to destruction of periodontal tissue and absorption of bone tissue in diabetic patients. Tumor necrosis factor receptor‑associated factor (TRAF)‑interacting protein with forkhead‑associated domain (TIFA) as a crucial regulator of inflammation activates the NF‑κB signaling pathway to regulate cell biological behavior. However, the function and mechanism of TIFA on DP suffer from a lack of research. In the present study, TIFA was upregulated in the periodontal tissue of a DP mouse model. In addition, the expression of TIFA in RAW264.7 cells was induced by high glucose (HG) culture and increased by lipopolysaccharide (LPS) from Porphyromonas gingivalis treatment in a time‑dependent manner. Knockdown of TIFA significantly reduced the levels of inflammatory cytokines, including TNF‑α, IL‑6, IL‑1β and monocyte chemoattractant protein‑1, in HG and LPS‑induced RAW264.7 cells. The nuclear translocation of NF‑κB p65 was induced by HG and LPS and was clearly suppressed by absence of TIFA. The expression of downstream factors Nod‑like receptor family pyrin domain‑containing 3 and apoptosis‑associated speck‑like protein was inhibited by silencing TIFA. Moreover, TIFA was increased by receptor activator of NF‑κB (RANK) ligand (RANKL) in a concentration dependent manner. The expression of cathepsin K, MMP9 and nuclear factor of activated T cells cytoplasmic 1 was downregulated by depletion of TIFA. RANKL‑induced osteoclast differentiation was inhibited by silencing of TIFA. Meanwhile, the decrease of TIFA blocked activation of the NF‑κB pathway in RANKL‑treated RAW264.7 cells. In conclusion, TIFA as a promoter regulates the inflammation and osteoclast differentiation via activating the NF‑κB signaling pathway.
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Affiliation(s)
- Xiaoqian Guo
- Department of Periodontology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
- Ningxia Key Laboratory of Oral Disease Research, School of Stomatology, Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Guangwei Qiao
- Department of Oral and Maxillofacial Surgery, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Jingjiao Wang
- Department of Periodontology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Changyi Yang
- Department of Periodontology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Min Zhao
- Department of Periodontology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Qian Zhang
- Department of Periodontology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Yingbiao Wan
- Department of Prosthodontics and Oral Implantology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
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Liu S, Zhuang Z, Liu F, Yuan X, Zhang Z, Liang X, Li X, Chen Y. Identification of potential biomarkers and infiltrating immune cells from scalp psoriasis. Gene 2024; 893:147918. [PMID: 37871808 DOI: 10.1016/j.gene.2023.147918] [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: 09/21/2023] [Revised: 10/16/2023] [Accepted: 10/20/2023] [Indexed: 10/25/2023]
Abstract
BACKGROUND Scalp psoriasis seriously affects the appearance and psychological status of patients. The aim of this study was to investigate the effect and potential mechanism of RPL9 and TIFA in scalp psoriasis, so as to provide a precise and effective way for the clinical treatment of scalp psoriasis. METHODS The Gene Expression Omnibus (GEO) database was employed to download the GSE75343 dataset to search for differentially expressed genes (DEGs) in scalp psoriasis through Sangerbox. Gene set enrichment analysis (GSEA) and gene set variation analysis (GSVA) enrichment analysis, functional enrichment analysis, immune cell infiltration analysis, immune responses and correlation analysis with 12 hub genes were performed. Then, STRING was used to develop a protein-protein interaction (PPI) network, used Cytoscape to locate hub genes, and SVM-RFE and random forest were utilized to identified RPL9 as the targeted gene. TIFA-RPL9 interaction predictions were made viathe Open Targets Platform and Uniprot. Further, the RPL9 and TIFA expression, molecular mechanism, and function were assessed in scalp psoriasis. RESULTS Immunohistochemistry, qPCR, and western blotting verified that RPL9 and TIFA were highly expressed in lesional tissues of scalp psoriasis and IL17A-stimulated HaCaT cells. RPL9 knockdown effectively suppressed the proliferative capacity of IL17A-stimulated HaCaT cells in the CCK8 assay. The co-immunoprecipitation results revealed that RPL9 could interact with TIFA in IL17A-stimulated HaCaT cells. In qPCR and western blotting, RPL9 knockdown significantly inhibited TIFA at the mRNA and protein levels in IL17A-stimulated HaCaT cells. In ELISA, the secretion of TNF-α was markedly inhibited after downregulating RPL9 in IL17A-stimulated HaCaT cells. CONCLUSION To our knowledge, we have elucidated the expression and role of RPL9 and TIFA in scalp psoriatic skin and keratinocytes, and our findings confirm that RPL9 might act as a candidate therapeutic target for scalp psoriasis.
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Affiliation(s)
- Shougang Liu
- Department of Dermatology, Dermatology Hospital of Southern Medical University, Guangzhou, Guangdong, China
| | - Zhe Zhuang
- Department of Dermatology, Dermatology Hospital of Southern Medical University, Guangzhou, Guangdong, China; Department of Dermatology, Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Fanghua Liu
- Department of Dermatology, Dermatology Hospital of Southern Medical University, Guangzhou, Guangdong, China; Department of Dermatology, Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Xiuqing Yuan
- Department of Dermatology, Dermatology Hospital of Southern Medical University, Guangzhou, Guangdong, China
| | - Zeqiao Zhang
- Department of Dermatology, Dermatology Hospital of Southern Medical University, Guangzhou, Guangdong, China
| | - Xiaoqian Liang
- Department of Dermatology, Dermatology Hospital of Southern Medical University, Guangzhou, Guangdong, China
| | - Xinhui Li
- Department of Dermatology, Dermatology Hospital of Southern Medical University, Guangzhou, Guangdong, China
| | - Yongfeng Chen
- Department of Dermatology, Dermatology Hospital of Southern Medical University, Guangzhou, Guangdong, China.
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Silva DO, Fernandes Júnior GA, Fonseca LFS, Mota LFM, Bresolin T, Carvalheiro R, de Albuquerque LG. Genome-wide association study for stayability at different calvings in Nellore beef cattle. BMC Genomics 2024; 25:93. [PMID: 38254039 PMCID: PMC10804543 DOI: 10.1186/s12864-024-10020-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 01/16/2024] [Indexed: 01/24/2024] Open
Abstract
BACKGROUNDING Stayability, which may be defined as the probability of a cow remaining in the herd until a reference age or at a specific number of calvings, is usually measured late in the animal's life. Thus, if used as selection criteria, it will increase the generation interval and consequently might decrease the annual genetic gain. Measuring stayability at an earlier age could be a reasonable strategy to avoid this problem. In this sense, a better understanding of the genetic architecture of this trait at different ages and/or at different calvings is important. This study was conducted to identify possible regions with major effects on stayability measured considering different numbers of calvings in Nellore cattle as well as pathways that can be involved in its expression throughout the female's productive life. RESULTS The top 10 most important SNP windows explained, on average, 17.60% of the genetic additive variance for stayability, varying between 13.70% (at the eighth calving) and 21% (at the fifth calving). These SNP windows were located on 17 chromosomes (1, 2, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 18, 19, 20, 27, and 28), and they harbored a total of 176 annotated genes. The functional analyses of these genes, in general, indicate that the expression of stayability from the second to the sixth calving is mainly affected by genetic factors related to reproductive performance, and nervous and immune systems. At the seventh and eighth calvings, genes and pathways related to animal health, such as density bone and cancer, might be more relevant. CONCLUSION Our results indicate that part of the target genomic regions in selecting for stayability at earlier ages (from the 2th to the 6th calving) would be different than selecting for this trait at later ages (7th and 8th calvings). While the expression of stayability at earlier ages appeared to be more influenced by genetic factors linked to reproductive performance together with an overall health/immunity, at later ages genetic factors related to an overall animal health gain relevance. These results support that selecting for stayability at earlier ages (perhaps at the second calving) could be applied, having practical implications in breeding programs since it could drastically reduce the generation interval, accelerating the genetic progress.
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Affiliation(s)
- Diogo Osmar Silva
- Animal Science Department, School of Agricultural and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil.
| | - Gerardo Alves Fernandes Júnior
- Animal Science Department, School of Agricultural and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | - Larissa Fernanda Simielli Fonseca
- Animal Science Department, School of Agricultural and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | - Lúcio Flávio Macedo Mota
- Animal Science Department, School of Agricultural and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | - Tiago Bresolin
- Animal Science Department, School of Agricultural and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | - Roberto Carvalheiro
- Animal Science Department, School of Agricultural and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | - Lucia Galvão de Albuquerque
- Animal Science Department, School of Agricultural and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil.
- National Council for Scientific and Technological Development (CNPq), Brasília, Brazil.
- Present address: Departamento de Zootecnia, Via de acesso Paulo Donato Castellane s/n., São Paulo, Jaboticabal, CEP: 14884-900, Brazil.
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Sidor K, Skirecki T. A Bittersweet Kiss of Gram-Negative Bacteria: The Role of ADP-Heptose in the Pathogenesis of Infection. Microorganisms 2023; 11:1316. [PMID: 37317291 DOI: 10.3390/microorganisms11051316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 05/10/2023] [Accepted: 05/15/2023] [Indexed: 06/16/2023] Open
Abstract
Due to the global crisis caused by the dramatic rise of drug resistance among Gram-negative bacteria, there is an urgent need for a thorough understanding of the pathogenesis of infections of such an etiology. In light of the limited availability of new antibiotics, therapies aimed at host-pathogen interactions emerge as potential treatment modalities. Thus, understanding the mechanism of pathogen recognition by the host and immune evasion appear to be the key scientific issues. Until recently, lipopolysaccharide (LPS) was recognized as a major pathogen-associated molecular pattern (PAMP) of Gram-negative bacteria. However, recently, ADP-L-glycero-β-D-manno-heptose (ADP-heptose), an intermediate carbohydrate metabolite of the LPS biosynthesis pathway, was discovered to activate the hosts' innate immunity. Therefore, ADP-heptose is regarded as a novel PAMP of Gram-negative bacteria that is recognized by the cytosolic alpha kinase-1 (ALPK1) protein. The conservative nature of this molecule makes it an intriguing player in host-pathogen interactions, especially in the context of changes in LPS structure or even in its loss by certain resistant pathogens. Here, we present the ADP-heptose metabolism, outline the mechanisms of its recognition and the activation of its immunity, and summarize the role of ADP-heptose in the pathogenesis of infection. Finally, we hypothesize about the routes of the entry of this sugar into cytosol and point to emerging questions that require further research.
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Affiliation(s)
- Karolina Sidor
- Department of Translational Immunology and Experimental Intensive Care, Centre of Postgraduate Medical Education, Marymoncka 99/103, 01-813 Warsaw, Poland
| | - Tomasz Skirecki
- Department of Translational Immunology and Experimental Intensive Care, Centre of Postgraduate Medical Education, Marymoncka 99/103, 01-813 Warsaw, Poland
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Sokolova O, Maubach G, Naumann M. Helicobacter pylori regulates TIFA turnover in gastric epithelial cells. Eur J Cell Biol 2023; 102:151307. [PMID: 36965415 DOI: 10.1016/j.ejcb.2023.151307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/01/2023] [Accepted: 03/11/2023] [Indexed: 03/19/2023] Open
Abstract
The human pathogen Helicobacter pylori induces a strong inflammatory response in gastric mucosa manifested by the recruitment of neutrophils and macrophages to the places of infection, and by changes in epithelial integrity and function. At the molecular level, this innate immune response is essentially dependent on the activation of NF-κB transcription factors regulating the expression of chemotactic factors, e.g., IL-8. Recently, it has been demonstrated that the NF-κB signaling pathway is triggered by the bacterial heptose metabolites, which activate the host ALPK1-TIFA axis. TIFA has been suggested to promote oligomerization and activity of the E3 ubiquitin ligase TRAF6, which further stimulates TAK1-IKK signaling. Here, we demonstrate that ALPK1-dependent TIFA activation in H. pylori-infected gastric epithelial cells is followed in time by a decline in TIFA levels, and that this process is impeded by inhibitors of the proteasomal and lysosomal degradation. According to our data, TRAF2, TRAF6, TAK1 or NEMO are not required for TIFA degradation. Additionally, H. pylori promotes the interaction of TIFA with free polyubiquitin as well as with optineurin, TAX1BP1 and LAMP1, which are known protein adaptors involved in intracellular trafficking to lysosomes.
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Affiliation(s)
- Olga Sokolova
- Institute of Experimental Internal Medicine, Medical Faculty, Otto von Guericke University, 39120 Magdeburg, Germany.
| | - Gunter Maubach
- Institute of Experimental Internal Medicine, Medical Faculty, Otto von Guericke University, 39120 Magdeburg, Germany
| | - Michael Naumann
- Institute of Experimental Internal Medicine, Medical Faculty, Otto von Guericke University, 39120 Magdeburg, Germany
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The anti-cancer agent APR-246 can activate several programmed cell death processes to kill malignant cells. Cell Death Differ 2023; 30:1033-1046. [PMID: 36739334 PMCID: PMC10070280 DOI: 10.1038/s41418-023-01122-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/18/2023] [Accepted: 01/23/2023] [Indexed: 02/06/2023] Open
Abstract
Mutant TP53 proteins are thought to drive the development and sustained expansion of cancers at least in part through the loss of the wild-type (wt) TP53 tumour suppressive functions. Therefore, compounds that can restore wt TP53 functions in mutant TP53 proteins are expected to inhibit the expansion of tumours expressing mutant TP53. APR-246 has been reported to exert such effects in malignant cells and is currently undergoing clinical trials in several cancer types. However, there is evidence that APR-246 may also kill malignant cells that do not express mutant TP53. To support the clinical development of APR-246 it is important to understand its mechanism(s) of action. By establishing isogenic background tumour cell lines with different TP53/TRP53 states, we found that APR-246 can kill malignant cells irrespective of their TP53/TRP53 status. Accordingly, RNAseq analysis revealed that treatment with APR-246 induces expression of the same gene set in Eμ-Myc mouse lymphoma cells of all four possible TRP53 states, wt, wt alongside mutant, knockout and knockout alongside mutant. We found that depending on the type of cancer cell and the concentration of APR-246 used, this compound can kill malignant cells through induction of various programmed cell death pathways, including apoptosis, necroptosis and ferroptosis. The sensitivity of non-transformed cells to APR-246 also depended on the cell type. These findings reveal that the clinical testing of APR-246 should not be limited to cancers expressing mutant TP53 but expanded to cancers that express wt TP53 or are TP53-deficient.
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Li Y, Zhang J, Zhai P, Hu C, Suo J, Wang J, Liu C, Peng Z. The potential biomarker TIFA regulates pyroptosis in sepsis-induced acute kidney injury. Int Immunopharmacol 2023; 115:109580. [PMID: 36586274 DOI: 10.1016/j.intimp.2022.109580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 12/07/2022] [Accepted: 12/08/2022] [Indexed: 12/31/2022]
Abstract
Sepsis is the leading cause of acute kidney injury (AKI), and specific treatment options for septic AKI are very limited. Here, we used bulk RNA sequencing of a septic model of AKI to characterize the mRNA profile during AKI. The differentially expressed genes (DEGs) mainly participate in the inflammatory response and metabolic processes. Analysis of comprehensive mRNA-seq datasets revealed sepsis-induced AKI-specific cohorts of expressed genes, and six DEGs were tested in urine from septic patients with/without AKI. TRAF-interacting protein with forkhead-associated domain (TIFA) and fatty acid synthase (FASN) were differentially expressed in the urine from the sepsis-induced AKI group. Furthermore, we found that TIFA expression was significantly upregulated in mouse kidney tissue following cecal ligation and puncture (CLP). We sought to investigate its role in lipopolysaccharide (LPS) (TLR4 ligand)- and oligodeoxynucleotides (ODN) (TLR9 ligand)-treated human kidney cells and mouse. TIFA was located in Lotus tetragonolobus lectin (LTL) positive renal cells in kidney tissue, which was stained by immunofluorescence. Exposure of HK-2 cells to LPS and ODN caused disruption of the mitochondrial transmembrane potential. The results of transmission electron microscope (TEM) showed that mitochondrial damages were improved in TIFA-knockdown group. Moreover, knockdown of TIFA resulted in a decrease in the percentage of annexin V-positive and PI-negative cells after ODN treatment. The protein of NLRP3, Caspase-1 and GSDMD were also decreased when si-TIFA was transferred into HK-2 cells following LPS and ODN treatment. Activation of TIFA enhanced the expression of IL-1β and IL18. These results indicated that TIFA induced pyroptosis by activating the mitochondrial damage. Our study provides a detailed transcriptomic description of the renal cellular responses after sepsis. Our study suggest that TIFA is involved in pyroptosis by activating the mitochondrial damage and may be a therapeutic target to treat sepsis-induced kidney injury.
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Affiliation(s)
- Yiming Li
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei, China
| | - Jing Zhang
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei, China
| | - Pan Zhai
- Department of Integrated Traditional Chinese and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
| | - Chang Hu
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei, China
| | - Jinmeng Suo
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei, China
| | - Jing Wang
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei, China
| | - Chang Liu
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei, China
| | - Zhiyong Peng
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei, China; Center of Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA.
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Shen W, Du W, Li Y, Huang Y, Jiang X, Yang C, Tang J, Liu H, Luo N, Zhang X, Zhang Z. TIFA promotes CRC cell proliferation via RSK- and PRAS40- dependent manner. Cancer Sci 2022; 113:3018-3031. [PMID: 35635239 PMCID: PMC9459298 DOI: 10.1111/cas.15432] [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: 01/15/2022] [Revised: 05/02/2022] [Accepted: 05/15/2022] [Indexed: 11/26/2022] Open
Abstract
Previous studies have reported that TIFA plays different roles in various tumor types. However, the function of TIFA in colorectal cancer (CRC) remains unclear. Here, we showed that the expression of TIFA was markedly increased in CRC versus normal tissue, and positively correlated with CRC TNM stages. In agreement, we found that the CRC cell lines show increased TIFA expression levels versus normal control. The knockdown of TIFA inhibited cell proliferation but had no effect on cell apoptosis in vitro or in vivo. Moreover, the ectopic expression of TIFA enhanced cell proliferation ability in vitro and in vivo. In contrast, the expression of mutant TIFA (T9A, oligomerization site mutation; D6, TRAF6 binding site deletion) abolished TIFA‐mediated cell proliferation enhancement. Exploration of the underlying mechanism revealed that the protein synthesis‐associated kinase RSK and PRAS40 activation were responsible for TIFA‐mediated CRC progression. In summary, these findings suggest that TIFA plays a role in mediating CRC progression. This could provide a promising target for CRC therapy.
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Affiliation(s)
- Wenzhi Shen
- Key Laboratory of Precision Oncology in Universities of Shandong, Institute of Precision Medicine, Jining Medical University, Jining 272067, Shandong, China
| | - Wenfei Du
- Key Laboratory of Precision Oncology in Universities of Shandong, Institute of Precision Medicine, Jining Medical University, Jining 272067, Shandong, China
| | - Yanping Li
- Key Laboratory of Precision Oncology in Universities of Shandong, Institute of Precision Medicine, Jining Medical University, Jining 272067, Shandong, China
| | - Yongming Huang
- Department of General Surgery, Affiliated Hospital of, Jining Medical University, Jining Medical University, Jining, 272067, China
| | - Xinyu Jiang
- Key Laboratory of Precision Oncology in Universities of Shandong, Institute of Precision Medicine, Jining Medical University, Jining 272067, Shandong, China
| | - Chenglong Yang
- Key Laboratory of Precision Oncology in Universities of Shandong, Institute of Precision Medicine, Jining Medical University, Jining 272067, Shandong, China
| | - Jiaping Tang
- Department of Anatomy and Histology, School of Medicine, Nankai University, Tianjin 300071, China
| | - Huan Liu
- Surgery Teaching and Research Section, Clinical Medical School, Jining Medical University, Jining, 272067, China
| | - Na Luo
- Department of Anatomy and Histology, School of Medicine, Nankai University, Tianjin 300071, China
| | - Xiaoyuan Zhang
- Key Laboratory of Precision Oncology in Universities of Shandong, Institute of Precision Medicine, Jining Medical University, Jining 272067, Shandong, China
| | - Zhixin Zhang
- Key Laboratory of Precision Oncology in Universities of Shandong, Institute of Precision Medicine, Jining Medical University, Jining 272067, Shandong, China.,Department of Gastrointestinal Surgery, Affiliated Hospital of Jining Medical University, Jining 272029, China
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11
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Jiang C, Xie S, Yang G, Wang N. Spotlight on NLRP3 Inflammasome: Role in Pathogenesis and Therapies of Atherosclerosis. J Inflamm Res 2022; 14:7143-7172. [PMID: 34992411 PMCID: PMC8711145 DOI: 10.2147/jir.s344730] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 12/03/2021] [Indexed: 12/12/2022] Open
Abstract
Inflammation is an intricate biological response of body tissues to detrimental stimuli. Cardiovascular disease (CVD) is the leading cause of death worldwide, and inflammation is well documented to play a role in the development of CVD, especially atherosclerosis (AS). Emerging evidence suggests that activation of the NOD-like receptor (NLR) family and the pyridine-containing domain 3 (NLRP3) inflammasome is instrumental in inflammation and may result in AS. The NLRP3 inflammasome acts as a molecular platform that triggers the activation of caspase-1 and the cleavage of pro-interleukin (IL)-1β, pro-IL-18, and gasdermin D (GSDMD). The cleaved GSDMD forms pores in the cell membrane and initiates pyroptosis, inducing cell death and the discharge of intracellular pro-inflammatory factors. Hence, the NLRP3 inflammasome is a promising target for anti-inflammatory therapy against AS. In this review, we systematically summarized the current understanding of the activation mechanism of NLRP3 inflammasome, and the pathological changes in AS involving NLRP3. We also discussed potential therapeutic strategies targeting NLRP3 inflammasome to combat AS.
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Affiliation(s)
- Chunteng Jiang
- Department of Internal Medicine, The Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, People's Republic of China.,Department of Cardiology and Pneumology, University Medical Center of Göttingen, Georg-August-University of Göttingen, Göttingen, Lower Saxony, Germany
| | - Santuan Xie
- Department of Internal Medicine, The Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, People's Republic of China
| | - Guang Yang
- Department of Food Nutrition and Safety, School of Public Health, Dalian Medical University, Dalian, Liaoning, People's Republic of China
| | - Ningning Wang
- Department of Food Nutrition and Safety, School of Public Health, Dalian Medical University, Dalian, Liaoning, People's Republic of China
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12
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Zhao Z, Zhao Y, Zhang Y, Shi W, Li X, Shyy JYJ, He M, Wang L. Gout-induced endothelial impairment: The role of SREBP2 transactivation of YAP. FASEB J 2021; 35:e21613. [PMID: 33977576 DOI: 10.1096/fj.202100337r] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 04/01/2021] [Accepted: 04/06/2021] [Indexed: 12/14/2022]
Abstract
Gout is a multifaceted inflammatory disease involving vascular impairments induced by hyperuricemia. Experiments using human umbilical vein endothelial cells treated with uric acid (UA), monosodium urate (MSU), or serum from gout patients showed increased expression of pro-inflammatory genes (ie, VCAM1, ICAM1, CYR61, CCNA1, and E2F1) with attendant increase in monocyte adhesion. Mechanistically, UA- or MSU-induced SREBP2 expression and its transcriptional activity. RNA sequencing analysis and real-time PCR showed the induction of YAP signaling and pro-inflammatory pathways in HUVECs transfected with adenovirus-SREBP2. The SREBP2 knockdown by siRNA partially abolished UA- or MSU-induced YAP activity, pro-inflammatory gene expression, and monocytes adhesion. Vascular intima from transgenic mice overexpressing SREBP2 in endothelium or mice with hyperuricemia exhibited activated YAP signaling and increased expression of pro-inflammatory genes. Betulin, an SREBP pharmacological inhibitor, attenuated the UA-, MSU-, or gout serum-induced endothelial cell inflammation and dysfunction. In the human study, endothelial cell function, assessed by EndoPAT, was negatively correlated with serum UA level among gouty patients and healthy controls. Collectively, UA or MSU causes endothelial dysfunction via SREBP2 transactivation of YAP. Betulin inhibition of SREBP2 may restrain gout-induced endothelial dysfunction.
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Affiliation(s)
- Zunlan Zhao
- Department of General Medicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China.,Division of Cardiology, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Yingshuai Zhao
- Department of General Medicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Yuqing Zhang
- Division of Cardiology, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Weili Shi
- Department of General Medicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Xiqing Li
- Department of Oncology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - John Y-J Shyy
- Division of Cardiology, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Ming He
- Division of Cardiology, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Liuyi Wang
- Department of General Medicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
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13
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Wang WT, He M, Shimizu C, Croker BA, Hoffman HM, Tremoulet AH, Burns JC, Shyy JYJ. Inflammasome Activation in Children With Kawasaki Disease and Multisystem Inflammatory Syndrome. Arterioscler Thromb Vasc Biol 2021; 41:2509-2511. [PMID: 34261329 DOI: 10.1161/atvbaha.121.316210] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Wei-Ting Wang
- Division of Cardiology, Department of Medicine (W.-T.W., M.H., J.Y.-J.S.), University of California, San Diego, La Jolla
| | - Ming He
- Division of Cardiology, Department of Medicine (W.-T.W., M.H., J.Y.-J.S.), University of California, San Diego, La Jolla
| | - Chisato Shimizu
- Department of Pediatrics (C.S., B.A.C., H.M.H., A.H.T., J.C.B.), University of California, San Diego, La Jolla
| | - Ben A Croker
- Department of Pediatrics (C.S., B.A.C., H.M.H., A.H.T., J.C.B.), University of California, San Diego, La Jolla
| | - Hal M Hoffman
- Department of Pediatrics (C.S., B.A.C., H.M.H., A.H.T., J.C.B.), University of California, San Diego, La Jolla.,Rady Children's Hospital, San Diego, CA (H.M.H., A.H.T., J.C.B.)
| | - Adriana H Tremoulet
- Department of Pediatrics (C.S., B.A.C., H.M.H., A.H.T., J.C.B.), University of California, San Diego, La Jolla.,Rady Children's Hospital, San Diego, CA (H.M.H., A.H.T., J.C.B.)
| | - Jane C Burns
- Department of Pediatrics (C.S., B.A.C., H.M.H., A.H.T., J.C.B.), University of California, San Diego, La Jolla.,Rady Children's Hospital, San Diego, CA (H.M.H., A.H.T., J.C.B.)
| | - John Y-J Shyy
- Division of Cardiology, Department of Medicine (W.-T.W., M.H., J.Y.-J.S.), University of California, San Diego, La Jolla
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14
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TIFA protein expression is associated with pulmonary arterial hypertension. Sci Rep 2021; 11:14140. [PMID: 34238983 PMCID: PMC8266829 DOI: 10.1038/s41598-021-93582-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 06/07/2021] [Indexed: 11/24/2022] Open
Abstract
Tumor necrosis factor receptor-associated factor-interacting protein with a forkhead-associated domain (TIFA), a key regulator of inflammation, may be involved in the pathogenesis of pulmonary arterial hypertension (PAH). A total of 48 PAH patients (age 50.1 ± 13.1 years, 22.9% men), 25 hypertensive subjects, and 26 healthy controls were enrolled. TIFA protein expression in peripheral blood mononuclear cells (PBMCs) and plasma interleukin (IL)-1β and tumor necrosis factor (TNF)-α were measured. Pulmonary arterial hemodynamics were derived from right heart catheterization. PAH patients had the highest expression of TIFA, TNF-α, and IL-1β. TIFA protein expression was significantly associated with IL-1β (r = 0.94; P < 0.001), TNF-α (r = 0.93; P < 0.001), mean pulmonary artery pressure (r = 0.41; P = 0.006), and pulmonary vascular resistance (r = 0.41; P = 0.007). TIFA protein expression could independently predict the presence of PAH (odds ratio [95% confidence interval per-0.1 standard deviation]: 1.72 [1.37–2.16]; P < 0.001) and outperformed echocardiographic estimation. Ex vivo silencing of TIFA protein expression in PBMCs led to the suppression of the cellular expression of IL-1β and TNF-α. IL-1β and TNF-α mediated 80.4% and 56.6% of the causal relationship between TIFA and PAH, respectively, supporting the idea that TIFA protein is involved in the pathogenesis of PAH.
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15
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Asna Ashari K, Rezaei N. PFAPA (periodic fever, aphthous stomatitis, pharyngitis, and adenitis) syndrome: an overview of genetic background. Clin Rheumatol 2021; 40:4437-4444. [PMID: 34014414 DOI: 10.1007/s10067-021-05770-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 05/05/2021] [Accepted: 05/06/2021] [Indexed: 02/02/2023]
Abstract
Periodic fever, aphthous stomatitis, pharyngitis, and cervical adenitis (PFAPA) syndrome is an autoinflammatory disorder with an uncertain origin. PFAPA manifestations occur in the form of regular attacks accompanied by a rise in inflammatory markers. Regarding the family clustering of PFAPA and its similarities with other autoinflammatory disorders such as familial Mediterranean fever, a genetic basis is suggested for the disease. Studies have conducted genome analysis in order to find possible gene variants in PFAPA. Associations with variations in several genes such as MEFV, NLRP, TNFRSF1A, CARD15/NOD2, and MVK have been suggested and analyzed. Inflammasomes, intracellular proteins that are members of innate immunity and activate interleukin-1b (IL-1b) and IL-18, are proposed to be involved in PFAPA pathogenesis. The investigations show that a single gene cannot be found in association with PFAPA, and that it might have a multifactorial or polygenic basis, in which an environmental trigger can provoke inflammasome activation and activate PFAPA flares.
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Affiliation(s)
- Kosar Asna Ashari
- Department of Pediatrics, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Nima Rezaei
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Dr Qarib St, Keshavarz Blvd, 14194, Tehran, Iran. .,Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran. .,Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Tehran, Iran.
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16
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Faass L, Stein SC, Hauke M, Gapp M, Albanese M, Josenhans C. Contribution of Heptose Metabolites and the cag Pathogenicity Island to the Activation of Monocytes/Macrophages by Helicobacter pylori. Front Immunol 2021; 12:632154. [PMID: 34093525 PMCID: PMC8174060 DOI: 10.3389/fimmu.2021.632154] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 04/12/2021] [Indexed: 12/11/2022] Open
Abstract
The human gastric pathogen Helicobacter pylori activates human epithelial cells by a particular combination of mechanisms, including NOD1 and ALPK1-TIFA activation. These mechanisms are characterized by a strong participation of the bacterial cag pathogenicity island, which forms a type IV secretion system (CagT4SS) that enables the bacteria to transport proteins and diverse bacterial metabolites, including DNA, glycans, and cell wall components, into human host cells. Building on previous findings, we sought to determine the contribution of lipopolysaccharide inner core heptose metabolites (ADP-heptose) in the activation of human phagocytic cells by H. pylori. Using human monocyte/macrophage-like Thp-1 cells and human primary monocytes and macrophages, we were able to determine that a substantial part of early phagocytic cell activation, including NF-κB activation and IL-8 production, by live H. pylori is triggered by bacterial heptose metabolites. This effect was very pronounced in Thp-1 cells exposed to bacterial purified lysates or pure ADP-heptose, in the absence of other bacterial MAMPs, and was significantly reduced upon TIFA knock-down. Pure ADP-heptose on its own was able to strongly activate Thp-1 cells and human primary monocytes/macrophages. Comprehensive transcriptome analysis of Thp-1 cells co-incubated with live H. pylori or pure ADP-heptose confirmed a signature of ADP-heptose-dependent transcript activation in monocyte/macrophages. Bacterial enzyme-treated lysates (ETL) and pure ADP-heptose–dependent activation differentiated monocytes into macrophages of predominantly M1 type. In Thp-1 cells, the active CagT4SS was less required for the heptose-induced proinflammatory response than in epithelial cells, while active heptose biosynthesis or pure ADP-heptose was required and sufficient for their early innate response and NF-κB activation. The present data suggest that early activation and maturation of incoming and resident phagocytic cells (monocytes, macrophages) in the H. pylori–colonized stomach strongly depend on bacterial LPS inner core heptose metabolites, also with a significant contribution of an active CagT4SS.
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Affiliation(s)
- Larissa Faass
- Max von Pettenkofer Institute, Chair for Medical Microbiology and Hygiene, Ludwig Maximilians University Munich, Munich, Germany
| | - Saskia C Stein
- Institute for Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
| | - Martina Hauke
- Max von Pettenkofer Institute, Chair for Medical Microbiology and Hygiene, Ludwig Maximilians University Munich, Munich, Germany
| | - Madeleine Gapp
- Max von Pettenkofer Institute, Chair for Virology, Ludwig Maximilians University, Munich, Germany.,Gene Center and Department of Biochemistry, LMU Munich, Munich, Germany
| | - Manuel Albanese
- Max von Pettenkofer Institute, Chair for Virology, Ludwig Maximilians University, Munich, Germany.,Gene Center and Department of Biochemistry, LMU Munich, Munich, Germany
| | - Christine Josenhans
- Max von Pettenkofer Institute, Chair for Medical Microbiology and Hygiene, Ludwig Maximilians University Munich, Munich, Germany.,Institute for Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany.,German Center of Infection Research (DZIF), Partner site Munich, Munich, Germany.,DZIF, Partner site Hannover-Braunschweig, Hannover, Germany
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17
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Duan Z, Yuan C, Han Y, Zhou L, Zhao J, Ruan Y, Chen J, Ni M, Ji X. TMT-based quantitative proteomics analysis reveals the attenuated replication mechanism of Newcastle disease virus caused by nuclear localization signal mutation in viral matrix protein. Virulence 2021; 11:607-635. [PMID: 32420802 PMCID: PMC7549962 DOI: 10.1080/21505594.2020.1770482] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Nuclear localization of cytoplasmic RNA virus proteins mediated by intrinsic nuclear localization signal (NLS) plays essential roles in successful virus replication. We previously reported that NLS mutation in the matrix (M) protein obviously attenuates the replication and pathogenicity of Newcastle disease virus (NDV), but the attenuated replication mechanism remains unclear. In this study, we showed that M/NLS mutation not only disrupted M's nucleocytoplasmic trafficking characteristic but also impaired viral RNA synthesis and transcription. Using TMT-based quantitative proteomics analysis of BSR-T7/5 cells infected with the parental NDV rSS1GFP and the mutant NDV rSS1GFP-M/NLSm harboring M/NLS mutation, we found that rSS1GFP infection stimulated much greater quantities and more expression changes of differentially expressed proteins involved in host cell transcription, ribosomal structure, posttranslational modification, and intracellular trafficking than rSS1GFP-M/NLSm infection. Further in-depth analysis revealed that the dominant nuclear accumulation of M protein inhibited host cell transcription, RNA processing and modification, protein synthesis, posttranscriptional modification and transport; and this kind of inhibition could be weakened when most of M protein was confined outside the nucleus. More importantly, we found that the function of M protein in the cytoplasm effected the inhibition of TIFA expression in a dose-dependent manner, and promoted NDV replication by down-regulating TIFA/TRAF6/NF-κB-mediated production of cytokines. It was the first report about the involvement of M protein in NDV immune evasion. Taken together, our findings demonstrate that NDV replication is closely related to the nucleocytoplasmic trafficking of M protein, which accelerates our understanding of the molecular functions of NDV M protein.
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Affiliation(s)
- Zhiqiang Duan
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, Ministry of Education, Guizhou University , Guiyang, China.,College of Animal Science, Guizhou University , Guiyang, China
| | - Chao Yuan
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, Ministry of Education, Guizhou University , Guiyang, China.,College of Animal Science, Guizhou University , Guiyang, China
| | - Yifan Han
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, Ministry of Education, Guizhou University , Guiyang, China.,College of Animal Science, Guizhou University , Guiyang, China
| | - Lei Zhou
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, Ministry of Education, Guizhou University , Guiyang, China.,College of Animal Science, Guizhou University , Guiyang, China
| | - Jiafu Zhao
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, Ministry of Education, Guizhou University , Guiyang, China.,College of Animal Science, Guizhou University , Guiyang, China
| | - Yong Ruan
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, Ministry of Education, Guizhou University , Guiyang, China.,College of Animal Science, Guizhou University , Guiyang, China
| | - Jiaqi Chen
- College of Animal Science, Guizhou University , Guiyang, China
| | - Mengmeng Ni
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, Ministry of Education, Guizhou University , Guiyang, China.,College of Animal Science, Guizhou University , Guiyang, China
| | - Xinqin Ji
- College of Animal Science, Guizhou University , Guiyang, China
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18
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García-Weber D, Arrieumerlou C. ADP-heptose: a bacterial PAMP detected by the host sensor ALPK1. Cell Mol Life Sci 2021; 78:17-29. [PMID: 32591860 PMCID: PMC11072087 DOI: 10.1007/s00018-020-03577-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 06/12/2020] [Accepted: 06/15/2020] [Indexed: 01/16/2023]
Abstract
The innate immune response constitutes the first line of defense against pathogens. It involves the recognition of pathogen-associated molecular patterns (PAMPs) by pathogen recognition receptors (PRRs), the production of inflammatory cytokines and the recruitment of immune cells to infection sites. Recently, ADP-heptose, a soluble intermediate of the lipopolysaccharide biosynthetic pathway in Gram-negative bacteria, has been identified by several research groups as a PAMP. Here, we recapitulate the evidence that led to this identification and discuss the controversy over the immunogenic properties of heptose 1,7-bisphosphate (HBP), another bacterial heptose previously defined as an activator of innate immunity. Then, we describe the mechanism of ADP-heptose sensing by alpha-protein kinase 1 (ALPK1) and its downstream signaling pathway that involves the proteins TIFA and TRAF6 and induces the activation of NF-κB and the secretion of inflammatory cytokines. Finally, we discuss possible delivery mechanisms of ADP-heptose in cells during infection, and propose new lines of thinking to further explore the roles of the ADP-heptose/ALPK1/TIFA axis in infections and its potential implication in the control of intestinal homeostasis.
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Affiliation(s)
- Diego García-Weber
- INSERM, U1016, Institut Cochin, CNRS, UMR8104, Université de Paris, 22 rue Méchain, 75014, Paris, France
| | - Cécile Arrieumerlou
- INSERM, U1016, Institut Cochin, CNRS, UMR8104, Université de Paris, 22 rue Méchain, 75014, Paris, France.
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19
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Schubert KA, Xu Y, Shao F, Auerbuch V. The Yersinia Type III Secretion System as a Tool for Studying Cytosolic Innate Immune Surveillance. Annu Rev Microbiol 2020; 74:221-245. [PMID: 32660389 DOI: 10.1146/annurev-micro-020518-120221] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Microbial pathogens have evolved complex mechanisms to interface with host cells in order to evade host defenses and replicate. However, mammalian innate immune receptors detect the presence of molecules unique to the microbial world or sense the activity of virulence factors, activating antimicrobial and inflammatory pathways. We focus on how studies of the major virulence factor of one group of microbial pathogens, the type III secretion system (T3SS) of human pathogenic Yersinia, have shed light on these important innate immune responses. Yersinia are largely extracellular pathogens, yet they insert T3SS cargo into target host cells that modulate the activity of cytosolic innate immune receptors. This review covers both the host pathways that detect the Yersinia T3SS and the effector proteins used by Yersinia to manipulate innate immune signaling.
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Affiliation(s)
- Katherine Andrea Schubert
- Department of Microbiology and Environmental Toxicology, University of California, Santa Cruz, Santa Cruz, California 95064, USA;
| | - Yue Xu
- National Institute of Biological Sciences, Beijing 102206, China
| | - Feng Shao
- National Institute of Biological Sciences, Beijing 102206, China
| | - Victoria Auerbuch
- Department of Microbiology and Environmental Toxicology, University of California, Santa Cruz, Santa Cruz, California 95064, USA;
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20
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Niederkorn M, Agarwal P, Starczynowski DT. TIFA and TIFAB: FHA-domain proteins involved in inflammation, hematopoiesis, and disease. Exp Hematol 2020; 90:18-29. [PMID: 32910997 DOI: 10.1016/j.exphem.2020.08.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/24/2020] [Accepted: 08/25/2020] [Indexed: 12/19/2022]
Abstract
Forkhead-associated (FHA) domain-containing proteins are widely expressed across eubacteria and in eukaryotes. FHA domains contain phosphopeptide recognition motifs, which operate in a variety of phosphorylation-dependent and -independent biological processes, including the DNA damage response, signal transduction, and regulation of the cell cycle. More recently, two FHA domain-containing proteins were discovered in mammalian cells as tumor necrosis factor receptor-associated factor (TRAF)-interacting proteins: TIFA and TIFAB. TIFA and TIFAB are important modifiers of the innate immune signaling through their regulation of TRAF proteins. Recent studies have also revealed distinct roles for TIFA and TIFAB in the context of immune cell function, chronic inflammation, hematopoiesis, and hematologic disorders. Collectively, these studies indicate the important role of TIFA- and TIFAB-dependent signaling in hematopoietic cells and their dysregulation in several human diseases. In this review, we summarize the molecular mechanisms and biological role of these FHA-domain homologues, placing them into the context of human disease.
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Affiliation(s)
- Madeline Niederkorn
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH; Department of Cancer Biology, University of Cincinnati, Cincinnati, OH
| | - Puneet Agarwal
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Daniel T Starczynowski
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH; Department of Cancer Biology, University of Cincinnati, Cincinnati, OH; Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH.
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21
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Zhang H, Ma Y, Cao R, Wang G, Li S, Cao Y, Zhang H, Liu M, Liu G, Zhang J, Li S, Wang Y, Ma Y. Soluble uric acid induces myocardial damage through activating the NLRP3 inflammasome. J Cell Mol Med 2020; 24:8849-8861. [PMID: 32558367 PMCID: PMC7412683 DOI: 10.1111/jcmm.15523] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 04/25/2020] [Accepted: 05/24/2020] [Indexed: 01/29/2023] Open
Abstract
Uric acid crystal is known to activate the NLRP3 inflammasome and to cause tissue damages, which can result in many diseases, such as gout, chronic renal injury and myocardial damage. Meanwhile, soluble uric acid (sUA), before forming crystals, is also related to these diseases. This study was carried out to investigate whether sUA could also activate NLRP3 inflammasome in cardiomyocytes and to analyse the mechanisms. The cardiomyocyte activity was monitored, along with the levels of mature IL-1β and caspase-1 from H9c2 cells following sUA stimulus. We found that sUA was able to activate NLRP3 inflammasome, which was responsible for H9c2 cell apoptosis induced by sUA. By elevating TLR6 levels and then activating NF-κB/p65 signal pathway, sUA promoted NLRP3, pro-caspase 1 and pro-IL-1β production and provided the first signal of NLRP3 inflammasome activation. Meanwhile, ROS production regulated by UCP2 levels also contributed to NLRP3 inflammasome assembly and subsequent caspase 1 activation and mature IL-1β secretion. In addition, the tlr6 knockdown rats suffering from hyperuricemia showed the lower level of IL-1β and an ameliorative cardiac function. These findings suggest that sUA activates NLRP3 inflammasome in cardiomyocytes and they may provide one therapeutic strategy for myocardial damage induced by sUA.
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Affiliation(s)
- Hailong Zhang
- Joint National Laboratory for Antibody Drug EngineeringKey Laboratory of Cellular and Molecular Immunology of Henan ProvinceSchool of Basic MedicineHenan UniversityKaifengChina
| | - Yuting Ma
- Joint National Laboratory for Antibody Drug EngineeringKey Laboratory of Cellular and Molecular Immunology of Henan ProvinceSchool of Basic MedicineHenan UniversityKaifengChina
| | - Run Cao
- Joint National Laboratory for Antibody Drug EngineeringKey Laboratory of Cellular and Molecular Immunology of Henan ProvinceSchool of Basic MedicineHenan UniversityKaifengChina
| | - Guanli Wang
- Clinical LaboratoryHuaihe HospitalHenan UniversityKaifengChina
| | - Shaowei Li
- Joint National Laboratory for Antibody Drug EngineeringKey Laboratory of Cellular and Molecular Immunology of Henan ProvinceSchool of Basic MedicineHenan UniversityKaifengChina
| | - Yue Cao
- Joint National Laboratory for Antibody Drug EngineeringKey Laboratory of Cellular and Molecular Immunology of Henan ProvinceSchool of Basic MedicineHenan UniversityKaifengChina
| | - Hao Zhang
- Joint National Laboratory for Antibody Drug EngineeringKey Laboratory of Cellular and Molecular Immunology of Henan ProvinceSchool of Basic MedicineHenan UniversityKaifengChina
| | - Meichen Liu
- Joint National Laboratory for Antibody Drug EngineeringKey Laboratory of Cellular and Molecular Immunology of Henan ProvinceSchool of Basic MedicineHenan UniversityKaifengChina
| | - Guangchao Liu
- Joint National Laboratory for Antibody Drug EngineeringKey Laboratory of Cellular and Molecular Immunology of Henan ProvinceSchool of Basic MedicineHenan UniversityKaifengChina
| | - Jun Zhang
- Joint National Laboratory for Antibody Drug EngineeringKey Laboratory of Cellular and Molecular Immunology of Henan ProvinceSchool of Basic MedicineHenan UniversityKaifengChina
| | - Shulian Li
- Joint National Laboratory for Antibody Drug EngineeringKey Laboratory of Cellular and Molecular Immunology of Henan ProvinceSchool of Basic MedicineHenan UniversityKaifengChina
| | - Yaohui Wang
- Joint National Laboratory for Antibody Drug EngineeringKey Laboratory of Cellular and Molecular Immunology of Henan ProvinceSchool of Basic MedicineHenan UniversityKaifengChina
| | - Yuanfang Ma
- Joint National Laboratory for Antibody Drug EngineeringKey Laboratory of Cellular and Molecular Immunology of Henan ProvinceSchool of Basic MedicineHenan UniversityKaifengChina
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22
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Li Z, Guo J, Bi L. Role of the NLRP3 inflammasome in autoimmune diseases. Biomed Pharmacother 2020; 130:110542. [PMID: 32738636 DOI: 10.1016/j.biopha.2020.110542] [Citation(s) in RCA: 128] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 07/13/2020] [Accepted: 07/20/2020] [Indexed: 12/12/2022] Open
Abstract
NOD-like receptor family pyrin domain containing 3 (NLRP3) is an intracellular receptor that senses foreign pathogens and endogenous danger signals. It assembles with apoptosis-associated speck-like protein containing a CARD (ASC) and caspase-1 to form a multimeric protein called the NLRP3 inflammasome. Among its various functions, the NLRP3 inflammasome can induce the release of the pro-inflammatory cytokines interleukin (IL)-1β and IL-18 while also promoting gasdermin D (GSDMD)-mediated pyroptosis. Previous studies have established a vital role for the NLRP3 inflammasome in innate and adaptive immune system as well as its contribution to several autoimmune diseases including rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), Sjögren's syndrome (SS), systemic sclerosis (SSc), and ankylosing spondylitis (AS). In this review, we briefly introduce the biological features of the NLRP3 inflammasome and present the mechanisms underlying its activation and regulation. We also summarize recent studies that have reported on the roles of NLRP3 inflammasome in the immune system and several autoimmune diseases, with a focus on therapeutic and clinical applications.
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Affiliation(s)
- Zhe Li
- Department of Rheumatology and Immunology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - Jialong Guo
- Department of Rheumatology and Immunology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - Liqi Bi
- Department of Rheumatology and Immunology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China.
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23
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MALDI-MSI spatially maps N-glycan alterations to histologically distinct pulmonary pathologies following irradiation. Sci Rep 2020; 10:11559. [PMID: 32665567 PMCID: PMC7360629 DOI: 10.1038/s41598-020-68508-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 06/20/2020] [Indexed: 12/15/2022] Open
Abstract
Radiation-induced lung injury is a highly complex combination of pathological alterations that develop over time and severity of disease development is dose-dependent. Following exposures to lethal doses of irradiation, morbidity and mortality can occur due to a combination of edema, pneumonitis and fibrosis. Protein glycosylation has essential roles in a plethora of biological and immunological processes. Alterations in glycosylation profiles have been detected in diseases ranging from infection, inflammation and cancer. We utilized mass spectrometry imaging to spatially map N-glycans to distinct pathological alterations during the clinically latent period and at 180 days post-exposure to irradiation. Results identified alterations in a number of high mannose, hybrid and complex N-glycans that were localized to regions of mucus and alveolar-bronchiolar hyperplasia, proliferations of type 2 epithelial cells, accumulations of macrophages, edema and fibrosis. The glycosylation profiles indicate most alterations occur prior to the onset of clinical symptoms as a result of pathological manifestations. Alterations in five N-glycans were identified as a function of time post-exposure. Understanding the functional roles N-glycans play in the development of these pathologies, particularly in the accumulation of macrophages and their phenotype, may lead to new therapeutic avenues for the treatment of radiation-induced lung injury.
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24
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The Pivotal Role of the Dysregulation of Cholesterol Homeostasis in Cancer: Implications for Therapeutic Targets. Cancers (Basel) 2020; 12:cancers12061410. [PMID: 32486083 DOI: 10.3390/cancers12061410] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 05/23/2020] [Accepted: 05/28/2020] [Indexed: 12/12/2022] Open
Abstract
Cholesterol plays an important role in cellular homeostasis by maintaining the rigidity of cell membranes, providing a medium for signaling transduction, and being converted into other vital macromolecules, such as sterol hormones and bile acids. Epidemiological studies have shown the correlation between cholesterol content and cancer incidence worldwide. Accumulating evidence has shown the emerging roles of the dysregulation of cholesterol metabolism in cancer development. More specifically, recent reports have shown the distinct role of cholesterol in the suppression of immune cells, regulation of cell survival, and modulation of cancer stem cells in cancer. Here, we provide a comprehensive review of the epidemiological analysis, functional roles, and mechanistic action of cholesterol homeostasis in regard to its contribution to cancer development. Based on the existing data, cholesterol homeostasis is identified to be a new key player in cancer pathogenesis. Lastly, we also discuss the therapeutic implications of natural compounds and cholesterol-lowering drugs in cancer prevention and treatment. In conclusion, intervention in cholesterol metabolism may offer a new therapeutic avenue for cancer treatment.
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25
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He M, Martin M, Marin T, Chen Z, Gongol B. Endothelial mechanobiology. APL Bioeng 2020; 4:010904. [PMID: 32095737 PMCID: PMC7032971 DOI: 10.1063/1.5129563] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 01/19/2020] [Indexed: 12/11/2022] Open
Abstract
Lining the luminal surface of the vasculature, endothelial cells (ECs) are in direct
contact with and differentially respond to hemodynamic forces depending on their anatomic
location. Pulsatile shear stress (PS) is defined by laminar flow and is predominantly
located in straight vascular regions, while disturbed or oscillatory shear stress (OS) is
localized to branch points and bifurcations. Such flow patterns have become a central
focus of vascular diseases, such as atherosclerosis, because the focal distribution of
endothelial dysfunction corresponds to regions exposed to OS, whereas endothelial
homeostasis is maintained in regions defined by PS. Deciphering the mechanotransduction
events that occur in ECs in response to differential flow patterns has required the
innovation of multidisciplinary approaches in both in vitro and
in vivo systems. The results from these studies have identified a
multitude of shear stress-regulated molecular networks in the endothelium that are
implicated in health and disease. This review outlines the significance of scientific
findings generated in collaboration with Dr. Shu Chien.
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Affiliation(s)
- Ming He
- Department of Medicine, University of California, San Diego, California 92093, USA
| | - Marcy Martin
- Department of Pediatrics, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Traci Marin
- Department of Health Sciences, Victor Valley College, Victorville, California 92395, USA
| | - Zhen Chen
- Department of Diabetes Complications and Metabolism, Beckman Research Institute, City of Hope, California 91010, USA
| | - Brendan Gongol
- Department of Medicine, University of California, San Diego, California 92093, USA
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26
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Emerging Activators and Regulators of Inflammasomes and Pyroptosis. Trends Immunol 2019; 40:1035-1052. [DOI: 10.1016/j.it.2019.09.005] [Citation(s) in RCA: 169] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 09/16/2019] [Accepted: 09/18/2019] [Indexed: 02/08/2023]
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27
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Carson D, Barry R, Hopkins EGD, Roumeliotis TI, García-Weber D, Mullineaux-Sanders C, Elinav E, Arrieumerlou C, Choudhary JS, Frankel G. Citrobacter rodentium induces rapid and unique metabolic and inflammatory responses in mice suffering from severe disease. Cell Microbiol 2019; 22:e13126. [PMID: 31610608 PMCID: PMC7003488 DOI: 10.1111/cmi.13126] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 09/26/2019] [Indexed: 12/14/2022]
Abstract
The mouse pathogen Citrobacter rodentium is used to model infections with enterohaemorrhagic and enteropathogenic Escherichia coli (EHEC and EPEC). Pathogenesis is commonly modelled in mice developing mild disease (e.g., C57BL/6). However, little is known about host responses in mice exhibiting severe colitis (e.g., C3H/HeN), which arguably provide a more clinically relevant model for human paediatric enteric infection. Infection of C3H/HeN mice with C. rodentium results in rapid colonic colonisation, coinciding with induction of key inflammatory signatures and colonic crypt hyperplasia. Infection also induces dramatic changes to bioenergetics in intestinal epithelial cells, with transition from oxidative phosphorylation (OXPHOS) to aerobic glycolysis and higher abundance of SGLT4, LDHA, and MCT4. Concomitantly, mitochondrial proteins involved in the TCA cycle and OXPHOS were in lower abundance. Similar to observations in C57BL/6 mice, we detected simultaneous activation of cholesterol biogenesis, import, and efflux. Distinctly, however, the pattern recognition receptors NLRP3 and ALPK1 were specifically induced in C3H/HeN. Using cell‐based assays revealed that C. rodentium activates the ALPK1/TIFA axis, which is dependent on the ADP‐heptose biosynthesis pathway but independent of the Type III secretion system. This study reveals for the first time the unfolding intestinal epithelial cells' responses during severe infectious colitis, which resemble EPEC human infections.
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Affiliation(s)
- Danielle Carson
- Centre for Molecular Microbiology and Infection, Department of Life Sciences, Imperial College London, London, UK
| | - Rachael Barry
- Centre for Molecular Microbiology and Infection, Department of Life Sciences, Imperial College London, London, UK
| | - Eve G D Hopkins
- Centre for Molecular Microbiology and Infection, Department of Life Sciences, Imperial College London, London, UK
| | - Theodoros I Roumeliotis
- Functional Proteomics Group, Chester Beatty Laboratories, Institute of Cancer Research, London, UK
| | - Diego García-Weber
- Inserm U1016, Institute Cochin, Paris, France.,CNRS, UMR 8104, Paris, France.,Sorbonne Paris Cité, Université Paris Descartes, Paris, France
| | - Caroline Mullineaux-Sanders
- Centre for Molecular Microbiology and Infection, Department of Life Sciences, Imperial College London, London, UK
| | - Eran Elinav
- Department of Immunology, Weizmann Institute of Science, Rehovot, Israel
| | - Cécile Arrieumerlou
- Inserm U1016, Institute Cochin, Paris, France.,CNRS, UMR 8104, Paris, France.,Sorbonne Paris Cité, Université Paris Descartes, Paris, France
| | - Jyoti S Choudhary
- Functional Proteomics Group, Chester Beatty Laboratories, Institute of Cancer Research, London, UK
| | - Gad Frankel
- Centre for Molecular Microbiology and Infection, Department of Life Sciences, Imperial College London, London, UK
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28
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Pfannkuch L, Hurwitz R, Traulsen J, Sigulla J, Poeschke M, Matzner L, Kosma P, Schmid M, Meyer TF. ADP heptose, a novel pathogen-associated molecular pattern identified in Helicobacter pylori. FASEB J 2019; 33:9087-9099. [PMID: 31075211 PMCID: PMC6662969 DOI: 10.1096/fj.201802555r] [Citation(s) in RCA: 103] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The gastric pathogen Helicobacter pylori activates the NF-κB pathway in human epithelial cells via the recently discovered α-kinase 1 TRAF-interacting protein with forkhead-associated domain (TIFA) axis. We and others showed that this pathway can be triggered by heptose 1,7-bisphosphate (HBP), an LPS intermediate produced in gram-negative bacteria that represents a new pathogen-associated molecular pattern (PAMP). Here, we report that our attempts to identify HBP in lysates of H. pylori revealed surprisingly low amounts, failing to explain NF-κB activation. Instead, we identified ADP-glycero-β-D-manno-heptose (ADP heptose), a derivative of HBP, as the predominant PAMP in lysates of H. pylori and other gram-negative bacteria. ADP heptose exhibits significantly higher activity than HBP, and cells specifically sensed the presence of the β-form, even when the compound was added extracellularly. The data lead us to conclude that ADP heptose not only constitutes the key PAMP responsible for H. pylori–induced NF-κB activation in epithelial cells, but it acts as a general gram-negative bacterial PAMP.—Pfannkuch, L., Hurwitz, R., Traulsen, J., Sigulla, J., Poeschke, M., Matzner, L., Kosma, P., Schmid, M., Meyer, T. F. ADP heptose, a novel pathogen-associated molecular pattern identified in Helicobacter pylori.
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Affiliation(s)
- Lennart Pfannkuch
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany.,Department of Infectious Diseases and Pulmonary Medicine, Charité, University Hospital Berlin, Berlin, Germany.,Berlin Institute of Health, Berlin, Germany
| | - Robert Hurwitz
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Jan Traulsen
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Janine Sigulla
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Marcella Poeschke
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Laura Matzner
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Paul Kosma
- Department of Chemistry, University of Natural Resources and Life Sciences-Vienna, Vienna, Austria
| | - Monika Schmid
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Thomas F Meyer
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
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29
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Affiliation(s)
- Ying Jin
- 1 Laboratory of Inflammation and Vascular Biology Institute of Clinical Medicine Hubei University of Medicine Renmin Hospital Shiyan China.,2 Center for Translational Medicine Hubei University of Medicine Renmin Hospital Shiyan China
| | - Jian Fu
- 1 Laboratory of Inflammation and Vascular Biology Institute of Clinical Medicine Hubei University of Medicine Renmin Hospital Shiyan China.,2 Center for Translational Medicine Hubei University of Medicine Renmin Hospital Shiyan China
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30
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Rare missense variants in the ALPK1 gene may predispose to periodic fever, aphthous stomatitis, pharyngitis and adenitis (PFAPA) syndrome. Eur J Hum Genet 2019; 27:1361-1368. [PMID: 31053777 DOI: 10.1038/s41431-019-0421-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 03/27/2019] [Accepted: 04/16/2019] [Indexed: 12/11/2022] Open
Abstract
PFAPA is an autoinflammatory syndrome characterized by periodic fever, aphthous stomatitis, sterile pharingitis, and adenitis, with an onset usually before the age of five. While the condition is most commonly sporadic, a few cases are familial and are usually compatible with an autosomal dominant (AD) transmission pattern, with reduced penetrance in some pedigrees. We performed exome analysis in a family where PFAPA was present in three relatives in two generations showing apparent AD segregation, identifying several rare and/or novel heterozygous variants in genes involved in the autoinflammatory pathway. Following segregation analysis of candidate variants, only one, c. 2770T>C p.(S924P) in the ALPK1 gene, was found to be consistently present in affected family members. ALPK1 is broadly expressed in different tissues and its protein is the intracellular kinase activated by the bacterial ADP-heptose bisphosphate that phosphorylates and activates TRAF-Interacting protein with Forkhead-Associated domain (TIFA) and triggers the immediate response to Gram-negative bacterial invasion. Sequencing analysis of 13 additional sporadic cases and 10 familial PFAPA cases identified two additional heterozygous missense variants c.1024G>C p.(D342H) and c.710C>T p.(T237M) in two sporadic patients, suggesting that rare variants in ALPK1 may represent a predisposing factor for recurrent periodic fever in a pediatric population.
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31
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Huang WC, Liao JH, Hsiao TC, Wei TYW, Maestre-Reyna M, Bessho Y, Tsai MD. Binding and Enhanced Binding between Key Immunity Proteins TRAF6 and TIFA. Chembiochem 2018; 20:140-146. [PMID: 30378729 DOI: 10.1002/cbic.201800436] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 10/30/2018] [Indexed: 01/01/2023]
Abstract
Human tumor necrosis factor receptor associated factor (TRAF)-interacting protein, with a forkhead-associated domain (TIFA), is a key regulator of NF-κB activation. It also plays a key role in the activation of innate immunity in response to bacterial infection, through heptose 1,7-bisphosphate (HBP); a metabolite of lipopolysaccharide (LPS). However, the mechanism of TIFA function is largely unexplored, except for the suggestion of interaction with TRAF6. Herein, we provide evidence for direct binding, albeit weak, between TIFA and the TRAF domain of TRAF6, and it is shown that the binding is enhanced for a rationally designed double mutant, TIFA S174Q/M179D. Enhanced binding was also demonstrated for endogenous full-length TRAF6. Furthermore, the structures of the TRAF domain complexes with the consensus TRAF-binding peptides from the C terminus of wild-type and S174Q/M179D mutant TIFA, showing salt-bridge formation between residues 177-181 of TIFA and the binding pocket residues of the TRAF domain, were solved. Taken together, the results provide direct evidence and a structural basis for the TIFA-TRAF6 interaction, and show how this important biological function can be modulated.
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Affiliation(s)
- Wei-Cheng Huang
- Institute of Biological Chemistry, Academia Sinica, 128 Academia Road Sec. 2, Nankang, Taipei, 115, Taiwan
| | - Jiahn-Haur Liao
- Institute of Biological Chemistry, Academia Sinica, 128 Academia Road Sec. 2, Nankang, Taipei, 115, Taiwan
| | - Tzu-Chun Hsiao
- Institute of Biological Chemistry, Academia Sinica, 128 Academia Road Sec. 2, Nankang, Taipei, 115, Taiwan
| | - Tong-You Wade Wei
- Institute of Biological Chemistry, Academia Sinica, 128 Academia Road Sec. 2, Nankang, Taipei, 115, Taiwan
| | - Manuel Maestre-Reyna
- Institute of Biological Chemistry, Academia Sinica, 128 Academia Road Sec. 2, Nankang, Taipei, 115, Taiwan
| | - Yoshitaka Bessho
- Institute of Biological Chemistry, Academia Sinica, 128 Academia Road Sec. 2, Nankang, Taipei, 115, Taiwan
| | - Ming-Daw Tsai
- Institute of Biological Chemistry, Academia Sinica, 128 Academia Road Sec. 2, Nankang, Taipei, 115, Taiwan.,Institute of Biochemical Sciences, National (Taiwan) University, 1, Roosevelt Road Sec. 4, Taipei, 106, Taiwan
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32
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Lai B, Li Z, He M, Wang Y, Chen L, Zhang J, Yang Y, Shyy JYJ. Atheroprone flow enhances the endothelial-to-mesenchymal transition. Am J Physiol Heart Circ Physiol 2018; 315:H1293-H1303. [PMID: 30052471 PMCID: PMC6297807 DOI: 10.1152/ajpheart.00213.2018] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 07/06/2018] [Accepted: 07/19/2018] [Indexed: 01/02/2023]
Abstract
The endothelial-to-mesenchymal transition (EndoMT) is a cellular process featuring decreased expression of endothelial marker genes but increased expression of mesenchymal marker genes. The EndoMT is involved in endothelial dysfunction and the pathogenesis of atherosclerosis. To investigate the dynamic expression of EndoMT genes in vascular endothelial cells under atheroprotective pulsatile shear stress (PS) and atheroprone oscillatory shear stress (OS), we analyzed RNA sequencing data from multitimepoint shear-stress experiments. This unbiased analysis involving next-generation sequencing confirmed that PS and OS had an opposite effect in regulating EndoMT genes. Further experimental validations with H2O2 and gain- and loss-of-function approaches indicated that reactive oxygen species are involved in OS-induced EndoMT, whereas AMP-activated protein kinase and sirtuin-1 could inhibit OS-induced EndoMT. Furthermore, compared with PS, OS increased the DNA methylation of the promoter regions of von Willebrand factor, CD31, and cadherin 5 genes but decreased that of cadherin 2, fibroblast-specific protein 1, and vimentin. The translational implication of the present study builds on the ability of the antidiabetic drug metformin and cholesterol-lowering drug atorvastatin to suppress the EndoMT in cultured endothelial cells and in mouse aortas. NEW & NOTEWORTHY Our RNA sequencing data provided a genome-wide and unbiased view of the shear stress regulation of the endothelial-to-mesenchymal transition (EndoMT) in the endothelium. Furthermore, epigenetic regulation (e.g., DNA methylation) is a key mechanism involved in shear stress-regulated EndoMT. The translational implication of this study is that cardiovascular medications such as statins and metformin have similar beneficial effects as that of atheroprotective flow by mitigating EndoMT.
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Affiliation(s)
- Baochang Lai
- The Key Laboratory of Biomedical Information Engineering, Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University , Xi'an, Shaanxi China
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center , Xi'an, Shaanxi , China
- Institute for Cancer Research, School of Basic Medical Science, Xi'an Jiaotong University , Xi'an, Shaanxi China
| | - Zhao Li
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center , Xi'an, Shaanxi , China
| | - Ming He
- Division of Cardiology, Department of Medicine, University of California, San Diego, La Jolla, California
| | - Yili Wang
- The Key Laboratory of Biomedical Information Engineering, Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University , Xi'an, Shaanxi China
- Institute for Cancer Research, School of Basic Medical Science, Xi'an Jiaotong University , Xi'an, Shaanxi China
| | - Lili Chen
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center , Xi'an, Shaanxi , China
| | - Jiao Zhang
- Division of Cardiology, Department of Medicine, University of California, San Diego, La Jolla, California
| | - Yan Yang
- Department of Obstetrics and Gynaecology, the First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi China
| | - John Y-J Shyy
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center , Xi'an, Shaanxi , China
- Division of Cardiology, Department of Medicine, University of California, San Diego, La Jolla, California
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33
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Ryzhakov G, West NR, Franchini F, Clare S, Ilott NE, Sansom SN, Bullers SJ, Pearson C, Costain A, Vaughan-Jackson A, Goettel JA, Ermann J, Horwitz BH, Buti L, Lu X, Mukhopadhyay S, Snapper SB, Powrie F. Alpha kinase 1 controls intestinal inflammation by suppressing the IL-12/Th1 axis. Nat Commun 2018; 9:3797. [PMID: 30228258 PMCID: PMC6143560 DOI: 10.1038/s41467-018-06085-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 08/02/2018] [Indexed: 12/13/2022] Open
Abstract
Inflammatory bowel disease (IBD) are heterogenous disorders of the gastrointestinal tract caused by a spectrum of genetic and environmental factors. In mice, overlapping regions of chromosome 3 have been associated with susceptibility to IBD-like pathology, including a locus called Hiccs. However, the specific gene that controls disease susceptibility remains unknown. Here we identify a Hiccs locus gene, Alpk1 (encoding alpha kinase 1), as a potent regulator of intestinal inflammation. In response to infection with the commensal pathobiont Helicobacter hepaticus (Hh), Alpk1-deficient mice display exacerbated interleukin (IL)-12/IL-23 dependent colitis characterized by an enhanced Th1/interferon(IFN)-γ response. Alpk1 controls intestinal immunity via the hematopoietic system and is highly expressed by mononuclear phagocytes. In response to Hh, Alpk1-/- macrophages produce abnormally high amounts of IL-12, but not IL-23. This study demonstrates that Alpk1 promotes intestinal homoeostasis by regulating the balance of type 1/type 17 immunity following microbial challenge.
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Affiliation(s)
- Grigory Ryzhakov
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7FY, United Kingdom
| | - Nathaniel R West
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7FY, United Kingdom
- Genentech, Department of Cancer Immunology, South San Francisco, CA, 94080, USA
| | - Fanny Franchini
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7FY, United Kingdom
| | - Simon Clare
- Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1SA, United Kingdom
| | - Nicholas E Ilott
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7FY, United Kingdom
| | - Stephen N Sansom
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7FY, United Kingdom
| | - Samuel J Bullers
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7FY, United Kingdom
| | - Claire Pearson
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7FY, United Kingdom
| | - Alice Costain
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7FY, United Kingdom
| | - Alun Vaughan-Jackson
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7FY, United Kingdom
| | - Jeremy A Goettel
- Boston Children's Hospital and Harvard Medical School, Boston, MA, 02115, USA
| | - Joerg Ermann
- Department of Gastroenterology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, 02115, USA
| | - Bruce H Horwitz
- Department of Gastroenterology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, 02115, USA
| | - Ludovico Buti
- Ludwig Institute of Cancer Research, University of Oxford, Oxford, OX3 7DQ, United Kingdom
| | - Xin Lu
- Ludwig Institute of Cancer Research, University of Oxford, Oxford, OX3 7DQ, United Kingdom
| | | | - Scott B Snapper
- Boston Children's Hospital and Harvard Medical School, Boston, MA, 02115, USA
| | - Fiona Powrie
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7FY, United Kingdom.
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Fu J, Huang D, Yuan F, Xie N, Li Q, Sun X, Zhou X, Li G, Tong T, Zhang Y. TRAF-interacting protein with forkhead-associated domain (TIFA) transduces DNA damage-induced activation of NF-κB. J Biol Chem 2018; 293:7268-7280. [PMID: 29581234 DOI: 10.1074/jbc.ra117.001684] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 03/23/2018] [Indexed: 02/03/2023] Open
Abstract
DNA damage-induced NF-κB activation and the secretion of inflammatory cytokines play crucial roles in carcinogenesis and cellular senescence. However, the underlying mechanisms, especially the initial sensors and transducers connecting the nuclear DNA damage signal with cytoplasmic NF-κB activation remain incompletely understood. Here, we report that TRAF-interacting protein with forkhead-associated domain (TIFA), an established NF-κB activator in the cytosol, unexpectedly exhibited nuclear translocation and accumulation on damaged chromatin following genotoxic stress. Accordingly, we also found that DNA damage-induced transcriptional activation and the resulting secretion of classic NF-κB targets, including interleukin (IL)-6 and IL-8, was greatly enhanced in TIFA-overexpressing cells compared with control cells. Mechanistically, DNA damage-induced TIFA phosphorylation at threonine 9 (pThr-9), and this phosphorylation event, involving the pThr-binding forkhead-associated domain, was crucial for its enrichment on damaged chromatin and subsequent NF-κB activation. Moreover, in conjunction with its partner protein, the E3 ligase TNF receptor-associated factor 2 (TRAF2), TIFA relayed the DNA damage signals by stimulating ubiquitination of NF-κB essential modulator (NEMO), whose sumoylation, phosphorylation, and ubiquitination were critical for NF-κB's response to DNA damage. Consistently, TRAF2 knockdown suppressed TIFA overexpression-enhanced NEMO ubiquitination under genotoxic stress, and a unphosphorylatable Thr-9-mutated TIFA variant had only minor effects on NEMO poly-ubiquitination. Finally, in agreement with the model of DNA damage-associated secretory senescence barrier against carcinogenesis, ectopic TIFA expression limited proliferation of multiple myeloma cancer cells. In conclusion our results indicate that TIFA functions as a key transducer in DNA damage-induced NF-κB activation.
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Affiliation(s)
- Jingxuan Fu
- Peking University Research Center on Aging, Beijing 100191; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191
| | - Daoyuan Huang
- Peking University Research Center on Aging, Beijing 100191; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191
| | - Fuwen Yuan
- Peking University Research Center on Aging, Beijing 100191; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191
| | - Nan Xie
- Peking University Research Center on Aging, Beijing 100191; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191
| | - Qian Li
- Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing 100081, People's Republic of China
| | - Xinpei Sun
- Peking University Research Center on Aging, Beijing 100191; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191
| | - Xuehong Zhou
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191
| | - Guodong Li
- Peking University Research Center on Aging, Beijing 100191; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191
| | - Tanjun Tong
- Peking University Research Center on Aging, Beijing 100191; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191.
| | - Yu Zhang
- Peking University Research Center on Aging, Beijing 100191; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191.
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35
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Pachathundikandi K, Backert S. Heptose 1,7-Bisphosphate Directed TIFA Oligomerization: A Novel PAMP-Recognizing Signaling Platform in the Control of Bacterial Infections. Gastroenterology 2018; 154:778-783. [PMID: 29337150 DOI: 10.1053/j.gastro.2018.01.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | - Steffen Backert
- Friedrich Alexander University Erlangen/Nuremberg, Erlangen, Germany
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36
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Enhancer-associated long non-coding RNA LEENE regulates endothelial nitric oxide synthase and endothelial function. Nat Commun 2018; 9:292. [PMID: 29348663 PMCID: PMC5773557 DOI: 10.1038/s41467-017-02113-y] [Citation(s) in RCA: 113] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 11/08/2017] [Indexed: 12/21/2022] Open
Abstract
The optimal expression of endothelial nitric oxide synthase (eNOS), the hallmark of endothelial homeostasis, is vital to vascular function. Dynamically regulated by various stimuli, eNOS expression is modulated at transcriptional, post-transcriptional, and post-translational levels. However, epigenetic modulations of eNOS, particularly through long non-coding RNAs (lncRNAs) and chromatin remodeling, remain to be explored. Here we identify an enhancer-associated lncRNA that enhances eNOS expression (LEENE). Combining RNA-sequencing and chromatin conformation capture methods, we demonstrate that LEENE is co-regulated with eNOS and that its enhancer resides in proximity to eNOS promoter in endothelial cells (ECs). Gain- and Loss-of-function of LEENE differentially regulate eNOS expression and EC function. Mechanistically, LEENE facilitates the recruitment of RNA Pol II to the eNOS promoter to enhance eNOS nascent RNA transcription. Our findings unravel a new layer in eNOS regulation and provide novel insights into cardiovascular regulation involving endothelial function. eNOS expression is dynamically regulated both transcriptionally and post-transcriptionally by various stimuli. Here the authors identify an enhancer-associated lncRNA (LEENE) that is co-regulated with, and enhances eNOS expression.
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37
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Zimmermann S, Pfannkuch L, Al-Zeer MA, Bartfeld S, Koch M, Liu J, Rechner C, Soerensen M, Sokolova O, Zamyatina A, Kosma P, Mäurer AP, Glowinski F, Pleissner KP, Schmid M, Brinkmann V, Karlas A, Naumann M, Rother M, Machuy N, Meyer TF. ALPK1- and TIFA-Dependent Innate Immune Response Triggered by the Helicobacter pylori Type IV Secretion System. Cell Rep 2017; 20:2384-2395. [DOI: 10.1016/j.celrep.2017.08.039] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 07/17/2017] [Accepted: 08/09/2017] [Indexed: 12/20/2022] Open
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38
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Helicobacter pylori modulates host cell responses by CagT4SS-dependent translocation of an intermediate metabolite of LPS inner core heptose biosynthesis. PLoS Pathog 2017; 13:e1006514. [PMID: 28715499 PMCID: PMC5531669 DOI: 10.1371/journal.ppat.1006514] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 07/27/2017] [Accepted: 07/05/2017] [Indexed: 12/15/2022] Open
Abstract
Highly virulent Helicobacter pylori cause proinflammatory signaling inducing the transcriptional activation and secretion of cytokines such as IL-8 in epithelial cells. Responsible in part for this signaling is the cag pathogenicity island (cagPAI) that codetermines the risk for pathological sequelae of an H. pylori infection such as gastric cancer. The Cag type IV secretion system (CagT4SS), encoded on the cagPAI, can translocate various molecules into cells, the effector protein CagA, peptidoglycan metabolites and DNA. Although these transported molecules are known to contribute to cellular responses to some extent, a major part of the cagPAI-induced signaling leading to IL-8 secretion remains unexplained. We report here that biosynthesis of heptose-1,7-bisphosphate (HBP), an important intermediate metabolite of LPS inner heptose core, contributes in a major way to the H. pylori cagPAI-dependent induction of proinflammatory signaling and IL-8 secretion in human epithelial cells. Mutants defective in the genes required for synthesis of HBP exhibited a more than 95% reduction of IL-8 induction and impaired CagT4SS-dependent cellular signaling. The loss of HBP biosynthesis did not abolish the ability to translocate CagA. The human cellular adaptor TIFA, which was described before to mediate HBP-dependent activity in other Gram-negative bacteria, was crucial in the cagPAI- and HBP pathway-induced responses by H. pylori in different cell types. The active metabolite was present in H. pylori lysates but not enriched in bacterial supernatants. These novel results advance our mechanistic understanding of H. pylori cagPAI-dependent signaling mediated by intracellular pattern recognition receptors. They will also allow to better dissect immunomodulatory activities by H. pylori and to improve the possibilities of intervention in cagPAI- and inflammation-driven cancerogenesis. The Cag Type IV secretion system, which contributes to inflammation and cancerogenesis during chronic infection, is one of the major virulence and fitness factors of the bacterial gastric pathogen Helicobacter pylori. Up to now, the mechanisms leading to cagPAI-dependent signal transduction and cytokine secretion were not completely understood. We report here that HBP, an intermediate metabolite in LPS core heptose biosynthesis, is translocated into host cells dependent on the CagT4SS, and is a major factor leading to the activation of cellular responses. This response is connected to the human cellular adaptor protein TIFA. The knowledge of this specific response pathway is a major advance in understanding CagT4SS-dependent signaling and will enable us to understand better how H. pylori modulates the immune response repertoire in its human host.
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Borio A, Hofinger A, Kosma P, Zamyatina A. Chemical synthesis of the innate immune modulator – bacterial d - glycero -β- d - manno- heptose-1,7-bisphosphate (HBP). Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.06.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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40
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Wei TYW, Wu PY, Wu TJ, Hou HA, Chou WC, Teng CLJ, Lin CR, Chen JMM, Lin TY, Su HC, Huang CCF, Yu CTR, Hsu SL, Tien HF, Tsai MD. Aurora A and NF-κB Survival Pathway Drive Chemoresistance in Acute Myeloid Leukemia via the TRAF-Interacting Protein TIFA. Cancer Res 2016; 77:494-508. [PMID: 28069801 DOI: 10.1158/0008-5472.can-16-1004] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 09/28/2016] [Accepted: 10/14/2016] [Indexed: 11/16/2022]
Abstract
Aurora A-dependent NF-κB signaling portends poor prognosis in acute myeloid leukemia (AML) and other cancers, but the functional basis underlying this association is unclear. Here, we report that Aurora A is essential for Thr9 phosphorylation of the TRAF-interacting protein TIFA, triggering activation of the NF-κB survival pathway in AML. TIFA protein was overexpressed concurrently with Aurora A and NF-κB signaling factors in patients with de novo AML relative to healthy individuals and also correlated with poor prognosis. Silencing TIFA in AML lines and primary patient cells decreased leukemic cell growth and chemoresistance via downregulation of prosurvival factors Bcl-2 and Bcl-XL that support NF-κB-dependent antiapoptotic events. Inhibiting TIFA perturbed leukemic cytokine secretion and reduced the IC50 of chemotherapeutic drug treatments in AML cells. Furthermore, in vivo delivery of TIFA-inhibitory fragments potentiated the clearance of myeloblasts in the bone marrow of xenograft-recipient mice via enhanced chemotoxicity. Collectively, our results showed that TIFA supports AML progression and that its targeting can enhance the efficacy of AML treatments. Cancer Res; 77(2); 494-508. ©2016 AACR.
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Affiliation(s)
- Tong-You Wade Wei
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Pei-Yu Wu
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Ting-Jung Wu
- Division of Liver and Transplantation Surgery, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
| | - Hsin-An Hou
- Division of Hematology, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan.
| | - Wen-Chien Chou
- Departments of Laboratory Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Chieh-Lin Jerry Teng
- Division of Hematology/Medical Oncology, Department of Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Chih-Ru Lin
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Jo-Mei Maureen Chen
- Department of Applied Chemistry, National Chi Nan University, Nantou, Taiwan
| | - Ting-Yang Lin
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Hsiang-Chun Su
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | | | - Chang-Tze Ricky Yu
- Department of Applied Chemistry, National Chi Nan University, Nantou, Taiwan
| | - Shih-Lan Hsu
- Department of Education and Research, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Hwei-Fang Tien
- Division of Hematology, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Ming-Daw Tsai
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan. .,Genomics Research Center, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
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