1
|
Barisas DAG, Choi K. Extramedullary hematopoiesis in cancer. Exp Mol Med 2024; 56:549-558. [PMID: 38443597 PMCID: PMC10985111 DOI: 10.1038/s12276-024-01192-4] [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: 09/18/2023] [Revised: 12/21/2023] [Accepted: 12/26/2023] [Indexed: 03/07/2024] Open
Abstract
Hematopoiesis can occur outside of the bone marrow during inflammatory stress to increase the production of primarily myeloid cells at extramedullary sites; this process is known as extramedullary hematopoiesis (EMH). As observed in a broad range of hematologic and nonhematologic diseases, EMH is now recognized for its important contributions to solid tumor pathology and prognosis. To initiate EMH, hematopoietic stem cells (HSCs) are mobilized from the bone marrow into the circulation and to extramedullary sites such as the spleen and liver. At these sites, HSCs primarily produce a pathological subset of myeloid cells that contributes to tumor pathology. The EMH HSC niche, which is distinct from the bone marrow HSC niche, is beginning to be characterized. The important cytokines that likely contribute to initiating and maintaining the EMH niche are KIT ligands, CXCL12, G-CSF, IL-1 family members, LIF, TNFα, and CXCR2. Further study of the role of EMH may offer valuable insights into emergency hematopoiesis and therapeutic approaches against cancer. Exciting future directions for the study of EMH include identifying common and distinct EMH mechanisms in cancer, infectious diseases, and chronic autoimmune diseases to control these conditions.
Collapse
Affiliation(s)
- Derek A G Barisas
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Kyunghee Choi
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA.
| |
Collapse
|
2
|
Ren Q, Liu Z, Wu L, Yin G, Xie X, Kong W, Zhou J, Liu S. C/EBPβ: The structure, regulation, and its roles in inflammation-related diseases. Biomed Pharmacother 2023; 169:115938. [PMID: 38000353 DOI: 10.1016/j.biopha.2023.115938] [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: 09/06/2023] [Revised: 11/08/2023] [Accepted: 11/21/2023] [Indexed: 11/26/2023] Open
Abstract
Inflammation, a mechanism of the human body, has been implicated in many diseases. Inflammatory responses include the release of inflammatory mediators by activating various signaling pathways. CCAAT/enhancer binding protein β (C/EBPβ), a transcription factor in the C/EBP family, contains the leucine zipper (bZIP) domain. The expression of C/EBPβ is mediated at the transcriptional and post-translational levels, such as phosphorylation, acetylation, methylation, and SUMOylation. C/EBPβ has been involved in inflammatory responses by mediating several signaling pathways, such as MAPK/NF-κB and IL-6/JAK/STAT3 pathways. C/EBPβ plays an important role in the pathological development of inflammation-related diseases, such as osteoarthritis, pneumonia, hepatitis, inflammatory bowel diseases, and rheumatoid arthritis. Here, we comprehensively discuss the structure and biological effects of C/EBPβ and its role in inflammatory diseases.
Collapse
Affiliation(s)
- Qun Ren
- Department of Pharmacy, Gannan Medical University, Ganzhou 341000, China
| | - Zhaowen Liu
- Department of Pharmacy, Gannan Medical University, Ganzhou 341000, China
| | - Longhuo Wu
- Department of Pharmacy, Gannan Medical University, Ganzhou 341000, China
| | - Guoqiang Yin
- Ganzhou People's Hospital Affiliated to Nanchang University, Ganzhou 341000, China
| | - Xunlu Xie
- Department of Joint Surgery, Ganzhou People's Hospital, Ganzhou 341000, China
| | - Weihao Kong
- Department of Joint Surgery, Ganzhou People's Hospital, Ganzhou 341000, China
| | - Jianguo Zhou
- Department of Joint Surgery, Ganzhou People's Hospital, Ganzhou 341000, China
| | - Shiwei Liu
- Department of Joint Surgery, Ganzhou People's Hospital, Ganzhou 341000, China.
| |
Collapse
|
3
|
Zou Z, Yoshimura Y, Yamanishi Y, Oki S. Elucidating disease-associated mechanisms triggered by pollutants via the epigenetic landscape using large-scale ChIP-Seq data. Epigenetics Chromatin 2023; 16:34. [PMID: 37743474 PMCID: PMC10518938 DOI: 10.1186/s13072-023-00510-w] [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: 08/21/2023] [Accepted: 09/19/2023] [Indexed: 09/26/2023] Open
Abstract
BACKGROUND Despite well-documented effects on human health, the action modes of environmental pollutants are incompletely understood. Although transcriptome-based approaches are widely used to predict associations between chemicals and disorders, the molecular cues regulating pollutant-derived gene expression changes remain unclear. Therefore, we developed a data-mining approach, termed "DAR-ChIPEA," to identify transcription factors (TFs) playing pivotal roles in the action modes of pollutants. METHODS Large-scale public ChIP-Seq data (human, n = 15,155; mouse, n = 13,156) were used to predict TFs that are enriched in the pollutant-induced differentially accessible genomic regions (DARs) obtained from epigenome analyses (ATAC-Seq). The resultant pollutant-TF matrices were then cross-referenced to a repository of TF-disorder associations to account for pollutant modes of action. We subsequently evaluated the performance of the proposed method using a chemical perturbation data set to compare the outputs of the DAR-ChIPEA and our previously developed differentially expressed gene (DEG)-ChIPEA methods using pollutant-induced DEGs as input. We then adopted the proposed method to predict disease-associated mechanisms triggered by pollutants. RESULTS The proposed approach outperformed other methods using the area under the receiver operating characteristic curve score. The mean score of the proposed DAR-ChIPEA was significantly higher than that of our previously described DEG-ChIPEA (0.7287 vs. 0.7060; Q = 5.278 × 10-42; two-tailed Wilcoxon rank-sum test). The proposed approach further predicted TF-driven modes of action upon pollutant exposure, indicating that (1) TFs regulating Th1/2 cell homeostasis are integral in the pathophysiology of tributyltin-induced allergic disorders; (2) fine particulates (PM2.5) inhibit the binding of C/EBPs, Rela, and Spi1 to the genome, thereby perturbing normal blood cell differentiation and leading to immune dysfunction; and (3) lead induces fatty liver by disrupting the normal regulation of lipid metabolism by altering hepatic circadian rhythms. CONCLUSIONS Highlighting genome-wide chromatin change upon pollutant exposure to elucidate the epigenetic landscape of pollutant responses outperformed our previously described method that focuses on gene-adjacent domains only. Our approach has the potential to reveal pivotal TFs that mediate deleterious effects of pollutants, thereby facilitating the development of strategies to mitigate damage from environmental pollution.
Collapse
Affiliation(s)
- Zhaonan Zou
- Department of Drug Discovery Medicine, Kyoto University Graduate School of Medicine, 53 Shogoin Kawahara-Cho, Sakyo-Ku, Kyoto, 606-8507, Japan
| | - Yuka Yoshimura
- Department of Drug Discovery Medicine, Kyoto University Graduate School of Medicine, 53 Shogoin Kawahara-Cho, Sakyo-Ku, Kyoto, 606-8507, Japan
| | - Yoshihiro Yamanishi
- Department of Complex Systems Science, Graduate School of Informatics, Nagoya University, Furo-Cho, Chikusa-Ku, Nagoya, 464-8602, Japan
| | - Shinya Oki
- Department of Drug Discovery Medicine, Kyoto University Graduate School of Medicine, 53 Shogoin Kawahara-Cho, Sakyo-Ku, Kyoto, 606-8507, Japan.
| |
Collapse
|
4
|
Marchwicka A, Nowak K, Satyr A, Wołowiec D, Marcinkowska E. Immuno-Stimulating Activity of 1,25-Dihydroxyvitamin D in Blood Cells from Five Healthy People and in Blasts from Five Patients with Leukemias and Pre-Leukemic States. Int J Mol Sci 2023; 24:ijms24076504. [PMID: 37047477 PMCID: PMC10094698 DOI: 10.3390/ijms24076504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/22/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023] Open
Abstract
(1) Hematological malignancies are characterized by an immortalization, uncontrolled proliferation of blood cells and their differentiation block, followed by the loss of function. The primary goal in the treatment of leukemias is the elimination of rapidly proliferating leukemic cells (named blasts). However, chemotherapy, which removes proliferating blasts, also prevents the remaining immune cells from being activated. Acute leukemias affect elderly people, who are often not fit to survive aggressive chemotherapy. Therefore, there is a need of milder treatment, named differentiation therapy, which might simulate the immune system of the patient. 1,25-Dihydroxyvitamin D, or low-calcemic analogs of this compound, were proposed as supporting therapy in acute leukemias. (2) Bone marrow blasts from patients with hematological malignancies, and leukocytes from healthy volunteers were ex vivo exposed to 1,25-dihydroxyvitamin D, and then their genomes and transcriptomes were investigated. (3) Our analysis indicates that 1,25-dihydroxyvitamin D regulates in blood cells predominantly genes involved in immune response, such as CAMP (cathelicidin antimicrobial peptide), CP (ceruloplasmin), CXCL9 (C-X-C motif chemokine ligand 9), CD14 (CD14 molecule) or VMO1 (vitelline membrane outer layer 1 homolog). This concerns blood cells from healthy people, as well as blasts from patients with hematological malignancies. In addition, in one patient, 1,25-dihydroxyvitamin D significantly downregulated transcription of genes responsible for cell division and immortalization. (4) In conclusion, the data presented in this paper suggest that addition of 1,25-dihydroxyvitamin D to the currently available treatments would stimulate immune system, inhibit proliferation and reduce immortal potential of blasts.
Collapse
Affiliation(s)
- Aleksandra Marchwicka
- Department of Biotechnology, University of Wrocław, Joliot-Curie 14a, 50-383 Wrocław, Poland
| | - Kuba Nowak
- Faculty of Mathematics and Computer Science, University of Wrocław, Joliot-Curie 15, 50-383 Wrocław, Poland
| | - Anastasiia Satyr
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznan, Poland
| | - Dariusz Wołowiec
- Department of Hematology, Blood Neoplasms and Bone Marrow Transplantation, Wrocław Medical University, Pasteura 4, 50-367 Wrocław, Poland
| | - Ewa Marcinkowska
- Department of Biotechnology, University of Wrocław, Joliot-Curie 14a, 50-383 Wrocław, Poland
| |
Collapse
|
5
|
Matherne MG, Phillips ES, Embrey SJ, Burke CM, Machado HL. Emerging functions of C/EBPβ in breast cancer. Front Oncol 2023; 13:1111522. [PMID: 36761942 PMCID: PMC9905667 DOI: 10.3389/fonc.2023.1111522] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 01/05/2023] [Indexed: 01/26/2023] Open
Abstract
Breast tumorigenesis relies on complex interactions between tumor cells and their surrounding microenvironment, orchestrated by tightly regulated transcriptional networks. C/EBPβ is a key transcription factor that regulates the proliferation and differentiation of multiple cell types and modulates a variety of biological processes such as tissue homeostasis and the immune response. In addition, C/EBPβ has well-established roles in mammary gland development, is overexpressed in breast cancer, and has tumor-promoting functions. In this review, we discuss context-specific roles of C/EBPβ during breast tumorigenesis, isoform-specific gene regulation, and regulation of the tumor immune response. We present challenges in C/EBPβ biology and discuss the importance of C/EBPβ isoform-specific gene regulation in devising new therapeutic strategies.
Collapse
Affiliation(s)
- Megan G. Matherne
- Department of Biochemistry and Molecular Biology, Tulane School of Medicine, New Orleans, LA, United States
| | - Emily S. Phillips
- Department of Biochemistry and Molecular Biology, Tulane School of Medicine, New Orleans, LA, United States
| | - Samuel J. Embrey
- Department of Biochemistry and Molecular Biology, Tulane School of Medicine, New Orleans, LA, United States
| | - Caitlin M. Burke
- Department of Biochemistry and Molecular Biology, Tulane School of Medicine, New Orleans, LA, United States
| | - Heather L. Machado
- Department of Biochemistry and Molecular Biology, Tulane School of Medicine, New Orleans, LA, United States,Tulane Cancer Center, Louisiana Cancer Research Consortium, New Orleans, LA, United States,*Correspondence: Heather L. Machado,
| |
Collapse
|
6
|
Novel Insights into the Role of Kras in Myeloid Differentiation: Engaging with Wnt/β-Catenin Signaling. Cells 2023; 12:cells12020322. [PMID: 36672256 PMCID: PMC9857056 DOI: 10.3390/cells12020322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 01/07/2023] [Accepted: 01/11/2023] [Indexed: 01/19/2023] Open
Abstract
Cells of the HL-60 myeloid leukemia cell line can be differentiated into neutrophil-like cells by treatment with dimethyl sulfoxide (DMSO). The molecular mechanisms involved in this differentiation process, however, remain unclear. This review focuses on the differentiation of HL-60 cells. Although the Ras proteins, a group of small GTP-binding proteins, are ubiquitously expressed and highly homologous, each has specific molecular functions. Kras was shown to be essential for normal mouse development, whereas Hras and Nras are not. Kras knockout mice develop profound hematopoietic defects, indicating that Kras is required for hematopoiesis in adults. The Wnt/β-catenin signaling pathway plays a crucial role in regulating the homeostasis of hematopoietic cells. The protein β-catenin is a key player in the Wnt/β-catenin signaling pathway. A great deal of evidence shows that the Wnt/β-catenin signaling pathway is deregulated in malignant tumors, including hematological malignancies. Wild-type Kras acts as a tumor suppressor during DMSO-induced differentiation of HL-60 cells. Upon DMSO treatment, Kras translocates to the plasma membrane, and its activity is enhanced. Inhibition of Kras attenuates CD11b expression. DMSO also elevates levels of GSK3β phosphorylation, resulting in the release of unphosphorylated β-catenin from the β-catenin destruction complex and its accumulation in the cytoplasm. The accumulated β-catenin subsequently translocates into the nucleus. Inhibition of Kras attenuates Lef/Tcf-sensitive transcription activity. Thus, upon treatment of HL-60 cells with DMSO, wild-type Kras reacts with the Wnt/β-catenin pathway, thereby regulating the granulocytic differentiation of HL-60 cells. Wild-type Kras and the Wnt/β-catenin signaling pathway are activated sequentially, increasing the levels of expression of C/EBPα, C/EBPε, and granulocyte colony-stimulating factor (G-CSF) receptor.
Collapse
|
7
|
Wang H, Chen G, Ahn EH, Xia Y, Kang SS, Liu X, Liu C, Han MH, Chen S, Ye K. C/EBPβ/AEP is age-dependently activated in Parkinson's disease and mediates α-synuclein in the gut and brain. NPJ Parkinsons Dis 2023; 9:1. [PMID: 36609384 PMCID: PMC9822984 DOI: 10.1038/s41531-022-00430-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 11/11/2022] [Indexed: 01/09/2023] Open
Abstract
Parkinson's disease (PD) is the most common neurodegenerative motor disorder, and its pathologic hallmarks include extensive dopaminergic neuronal degeneration in the Substantia nigra associated with Lewy bodies, predominantly consisting of phosphorylated and truncated α-Synuclein (α-Syn). Asparagine endopeptidase (AEP) cleaves human α-Syn at N103 residue and promotes its aggregation, contributing to PD pathogenesis. However, how AEP mediates Lewy body pathologies during aging and elicits PD onset remains incompletely understood. Knockout of AEP or C/EBPβ from α-SNCA mice, and their chronic rotenone exposure models were used, and the mechanism of α-Syn from the gut that spread to the brain was observed. Here we report that C/EBPβ/AEP pathway, aggravated by oxidative stress, is age-dependently activated and cleaves α-Syn N103 and regulates Lewy body-like pathologies spreading from the gut into the brain in human α-SNCA transgenic mice. Deletion of C/EBPβ or AEP substantially diminished the oxidative stress, neuro-inflammation, and PD pathologies, attenuating motor dysfunctions in aged α-SNCA mice. Noticeably, PD pathologies initiate in the gut and progressively spread into the brain. Chronic gastric exposure to a low dose of rotenone initiates Lewy body-like pathologies in the gut that propagate into the brain in a C/EBPβ/AEP-dependent manner. Hence, our studies demonstrate that C/EBPβ/AEP pathway is critical for mediating Lewy body pathology progression in PD.
Collapse
Affiliation(s)
- Hualong Wang
- grid.16821.3c0000 0004 0368 8293Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200025 China ,grid.452458.aDepartment of Neurology, The First Hospital of Hebei Medical University (Department of Neurology, Hebei Hospital of Xuanwu Hospital Capital Medical University), Brain Aging and Cognitive Neuroscience Laboratory of Hebei Province, Neuromedical Technology Innovation Center of Hebei Province, Shijiazhuang, 050031 Hebei P. R. China ,grid.189967.80000 0001 0941 6502Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia 30322 USA
| | - Guiqin Chen
- grid.189967.80000 0001 0941 6502Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia 30322 USA ,grid.412632.00000 0004 1758 2270Department of Neurology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province 430060 China
| | - Eun Hee Ahn
- grid.189967.80000 0001 0941 6502Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia 30322 USA ,grid.256753.00000 0004 0470 5964Department of Physiology, College of Medicine, Hallym University, Hallymdaehak-gil, Chuncheon-si, Gangwon-Do, 24252, South Korea
| | - Yiyuan Xia
- grid.189967.80000 0001 0941 6502Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia 30322 USA
| | - Seong Su Kang
- grid.189967.80000 0001 0941 6502Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia 30322 USA
| | - Xia Liu
- grid.189967.80000 0001 0941 6502Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia 30322 USA
| | - Chang Liu
- grid.458489.c0000 0001 0483 7922CAS Key Laboratory of Brain Connectome and Manipulation, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055 China ,grid.458489.c0000 0001 0483 7922Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518000, China
| | - Ming-Hu Han
- grid.458489.c0000 0001 0483 7922Department of Mental Health and Public Health, Faculty of Life and Health Sciences, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055 China
| | - Shengdi Chen
- grid.16821.3c0000 0004 0368 8293Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200025 China
| | - Keqiang Ye
- grid.189967.80000 0001 0941 6502Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia 30322 USA ,grid.458489.c0000 0001 0483 7922Department of Biology, Faculty of Life and Health Sciences, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055 China
| |
Collapse
|
8
|
House JS, Gray S, Owen JR, Jima DD, Smart RC, Hall JR. C/EBPβ deficiency enhances the keratinocyte innate immune response to direct activators of cytosolic pattern recognition receptors. Innate Immun 2023; 29:14-24. [PMID: 37094088 PMCID: PMC10164275 DOI: 10.1177/17534259231162192] [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: 10/27/2022] [Revised: 01/10/2023] [Accepted: 02/08/2023] [Indexed: 04/26/2023] Open
Abstract
The skin is the first line of defense to cutaneous microbes and viruses, and epidermal keratinocytes play a critical role in preventing infection by viruses and pathogens through activation of the type I interferon (IFN) response. Using RNAseq analysis, here we report that the conditional deletion of C/EBPβ transcription factor in mouse epidermis (CKOβ mice) resulted in the upregulation of IFNβ and numerous keratinocyte interferon-stimulated genes (ISGs). The expression of cytosolic pattern recognition receptors (cPRRs), that recognize viral RNA and DNA, were significantly increased, and enriched in the RNAseq data set. cPRRs stimulate a type I IFN response that can trigger cell death to eliminate infected cells. To determine if the observed increases in cPRRs had functional consequences, we transfected CKOβ primary keratinocytes with the pathogen and viral mimics poly(I:C) (dsRNA) or poly(dA:dT) (synthetic B-DNA) that directly activate PRRs. Transfected CKOβ primary keratinocytes displayed an amplified type I IFN response which was accompanied by increased activation of IRF3, enhanced ISG expression, enhanced activation of caspase-8, caspase-3 and increased apoptosis. Our results identify C/EBPβ as a critical repressor of the keratinocyte type I IFN response, and demonstrates that the loss of C/EBPβ primes keratinocytes to the activation of cytosolic PRRs by pathogen RNA and DNA to induce cell death mediated by caspase-8 and caspase-3.
Collapse
Affiliation(s)
- John S. House
- Center of Human Health and the Environment, North Carolina State University, Raleigh, NC, 27695, USA
- Toxicology Graduate Program, North Carolina State University, Raleigh, NC, 27695, USA
- Biostatistics and Computational Biology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, Durham, NC 27709, USA
| | - Sophia Gray
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, 27695, USA
| | - Jennifer R. Owen
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, 27695, USA
| | - Dereje D. Jima
- Center of Human Health and the Environment, North Carolina State University, Raleigh, NC, 27695, USA
- Bioinformatics Research Center, North Carolina State University, Raleigh, NC, 27695, USA
| | - Robert C. Smart
- Center of Human Health and the Environment, North Carolina State University, Raleigh, NC, 27695, USA
- Toxicology Graduate Program, North Carolina State University, Raleigh, NC, 27695, USA
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, 27695, USA
| | - Jonathan R. Hall
- Center of Human Health and the Environment, North Carolina State University, Raleigh, NC, 27695, USA
- Toxicology Graduate Program, North Carolina State University, Raleigh, NC, 27695, USA
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, 27695, USA
| |
Collapse
|
9
|
Darvishi E, Ghamsari L, Leong SF, Ramirez R, Koester M, Gallagher E, Yu M, Mason JM, Merutka G, Kappel BJ, Rotolo JA. Anticancer Activity of ST101, A Novel Antagonist of CCAAT/Enhancer Binding Protein β. Mol Cancer Ther 2022; 21:1632-1644. [PMID: 36121385 PMCID: PMC9630826 DOI: 10.1158/1535-7163.mct-21-0962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 04/29/2022] [Accepted: 09/14/2022] [Indexed: 12/15/2022]
Abstract
CCAAT/enhancer binding protein β (C/EBPβ) is a basic leucine zipper (bZIP) family transcription factor, which is upregulated or overactivated in many cancers, resulting in a gene expression profile that drives oncogenesis. C/EBPβ dimerization regulates binding to DNA at the canonical TTGCGCAA motif and subsequent transcriptional activity, suggesting that disruption of dimerization represents a powerful approach to inhibit this previously "undruggable" oncogenic target. Here we describe the mechanism of action and antitumor activity of ST101, a novel and selective peptide antagonist of C/EBPβ that is currently in clinical evaluation in patients with advanced solid tumors. ST101 binds the leucine zipper domain of C/EBPβ, preventing its dimerization and enhancing ubiquitin-proteasome dependent C/EBPβ degradation. ST101 exposure attenuates transcription of C/EBPβ target genes, including a significant decrease in expression of survival, transcription factors, and cell-cycle-related proteins. The result of ST101 exposure is potent, tumor-specific in vitro cytotoxic activity in cancer cell lines including glioblastoma, breast, melanoma, prostate, and lung cancer, whereas normal human immune and epithelial cells are not impacted. Further, in mouse xenograft models ST101 exposure results in potent tumor growth inhibition or regression, both as a single agent and in combination studies. These data provide the First Disclosure of ST101, and support continued clinical development of ST101 as a novel strategy for targeting C/EBPβ-dependent cancers.
Collapse
Affiliation(s)
- Emad Darvishi
- Sapience Therapeutics, Inc. 500 Mamaroneck Ave. Suite 320, Harrison, NY 10528
| | - Lila Ghamsari
- Sapience Therapeutics, Inc. 500 Mamaroneck Ave. Suite 320, Harrison, NY 10528
| | - Siok F. Leong
- Sapience Therapeutics, Inc. 500 Mamaroneck Ave. Suite 320, Harrison, NY 10528
| | - Ricardo Ramirez
- Sapience Therapeutics, Inc. 500 Mamaroneck Ave. Suite 320, Harrison, NY 10528
| | - Mark Koester
- Sapience Therapeutics, Inc. 500 Mamaroneck Ave. Suite 320, Harrison, NY 10528
| | - Erin Gallagher
- Sapience Therapeutics, Inc. 500 Mamaroneck Ave. Suite 320, Harrison, NY 10528
| | - Miao Yu
- Department of Biology & Biochemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Jody M. Mason
- Department of Biology & Biochemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Gene Merutka
- Sapience Therapeutics, Inc. 500 Mamaroneck Ave. Suite 320, Harrison, NY 10528
| | - Barry J. Kappel
- Sapience Therapeutics, Inc. 500 Mamaroneck Ave. Suite 320, Harrison, NY 10528
| | - Jim A. Rotolo
- Sapience Therapeutics, Inc. 500 Mamaroneck Ave. Suite 320, Harrison, NY 10528, Corresponding Author (, telephone: 914-607-6935)
| |
Collapse
|
10
|
Moshkovits I, Kaminitz A, Reuveni D, Pasmanik‐Chor M, Brazowski E, Mildner A, Leutz A, Zigmond E. Immune cell C/EBPβ deficiency is associated with hepatic mononuclear defects and spontaneous hepatitis but not steatohepatitis induced liver fibrosis. Immun Inflamm Dis 2022; 10:e728. [PMID: 36301029 PMCID: PMC9609438 DOI: 10.1002/iid3.728] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 09/20/2022] [Accepted: 10/12/2022] [Indexed: 11/07/2022] Open
Abstract
BACKGROUND CCAAT/enhancer-binding protein β (C/EBPβ) is a transcription factor known to be involved in macrophage differentiation and function, steatohepatitis and liver fibrosis. METHODS Immune restricted C/EBPβ deficient and control mice were investigated in steady-state and in the CDA-HFD steatohepatitis model. Mice were assessed for weight change, liver biochemical profile, histology and hepatic phagocytes composition. RESULTS Flow cytometry analysis of hepatic nonparenchymal cells revealed reduced numbers of hepatic monocytes and Kupffer cells and an increase in hepatic MHC class II positive myeloid cells in immune cells restricted C/EBPβ deficient mice. Immune-restricted C/EBPβ deficiency resulted in decreased weight gain and appearance of mild spontaneous liver inflammation. Nevertheless, In the CDA-HFD steatohepatitis model, immune restricted C/EBPβ deficient and proficient mice exhibit similar grade of hepatic steatosis, liver enzymes levels and fibrosis stage. CONCLUSIONS Immune-restricted C/EBPβ deficiency leads to significant alteration in hepatic mononuclear phagocytes composition associated with spontaneous mild hepatitis. Steatohepatitis associated fibrosis is not dependent on C/EBPβ expression by immune cells.
Collapse
Affiliation(s)
- Itay Moshkovits
- Research Center for Digestive DiseasesTel Aviv Sourasky Medical CenterTel AvivIsrael,Sackler Faculty of MedicineTel Aviv UniversityTel AvivIsrael
| | - Ayelet Kaminitz
- Research Center for Digestive DiseasesTel Aviv Sourasky Medical CenterTel AvivIsrael,Sackler Faculty of MedicineTel Aviv UniversityTel AvivIsrael
| | - Debby Reuveni
- Research Center for Digestive DiseasesTel Aviv Sourasky Medical CenterTel AvivIsrael,Sackler Faculty of MedicineTel Aviv UniversityTel AvivIsrael,Center for Autoimmune Liver DiseasesTel Aviv Sourasky Medical CenterTel AvivIsrael
| | - Metsada Pasmanik‐Chor
- Bioinformatics Unit, George‐S. Wise Faculty of Life ScienceTel Aviv UniversityTel AvivIsrael
| | - Eli Brazowski
- Sackler Faculty of MedicineTel Aviv UniversityTel AvivIsrael,Department of PathologyTel Aviv Sourasky Medical CenterTel AvivIsrael
| | | | - Achim Leutz
- Max Delbrück Center for Molecular MedicineBerlinGermany
| | - Ehud Zigmond
- Research Center for Digestive DiseasesTel Aviv Sourasky Medical CenterTel AvivIsrael,Sackler Faculty of MedicineTel Aviv UniversityTel AvivIsrael,Center for Autoimmune Liver DiseasesTel Aviv Sourasky Medical CenterTel AvivIsrael
| |
Collapse
|
11
|
Luo Y, Ge P, Wen H, Zhang Y, Liu J, Dong X, Lan B, Zhang G, Yang Q, Chen H. C/EBPβ Promotes LPS-Induced IL-1β Transcription and Secretion in Alveolar Macrophages via NOD2 Signaling. J Inflamm Res 2022; 15:5247-5263. [PMID: 36120185 PMCID: PMC9477153 DOI: 10.2147/jir.s377499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 09/01/2022] [Indexed: 12/11/2022] Open
Abstract
Objective C/EBPβ, a crucial transcription factor, regulates innate immunity and inflammatory responses. However, the role played by C/EBPβ in alveolar macrophage (AM) inflammatory responses remains unknown. This study aimed to investigate the role and mechanism of C/EBPβ in alveolar macrophages (AMs) from the transcriptional level and to search for natural compounds targeting C/EBPβ. Methods Rat AMs were infected with Lv-sh-C/EBPβ and treated with LPS, and the expression levels of iNOS, TNF-α, IL-6, and IL-1β were measured by RT-qPCR, Western blotting, and ELISA. Mechanistically, transcriptome sequencing (RNA-seq) revealed changes in gene expression patterns in AMs after LPS stimulation and C/EBPβ knockdown. Functional enrichment analyses and rescue experiments identified and validated inflammation-associated cell signaling pathways regulated by C/EBPβ. Furthermore, virtual screening was used to search for natural compounds that inhibit C/EBPβ with the structure of helenalin as a reference. Results Following stimulation with LPS, AMs exhibited an increased expression of C/EBPβ. C/EBPβ knockdown significantly decreased the expression levels of inflammatory mediators. A total of 374 differentially expressed genes (DEGs) were identified between LPS-stimulated C/EBPβ knockdown and negative control cells. The NOD-like receptor signaling may be a key target for C/EBPβ, according to functional enrichment analyses of the DEGs. Further experiments showed that the muramyl dipeptide (MDP, NOD2 agonist) reversed the downregulation of inflammatory mediators and the NF-κB pathway caused by the C/EBPβ knockdown. The virtual screening revealed that N-caffeoyltryptophan, orilotimod, and petasiphenone have comparable pharmacological properties to helenalin (a known C/EBPβ inhibitor) and demonstrate a great binding capacity to C/EBPβ. Conclusion Ablation of C/EBPβ may attenuate LPS-induced inflammatory damage in AMs by inhibiting the NOD2 receptor signaling pathway. Three natural compounds, N-caffeoyltryptophan, orilotimod, and petasiphenone, may be potential C/EBPβ inhibitors.
Collapse
Affiliation(s)
- Yalan Luo
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China.,Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China
| | - Peng Ge
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China.,Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China
| | - Haiyun Wen
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China.,Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China
| | - Yibo Zhang
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China.,Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China
| | - Jin Liu
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China
| | - Xuanchi Dong
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China
| | - Bowen Lan
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China
| | - Guixin Zhang
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China.,Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China
| | - Qi Yang
- Department of Traditional Chinese Medicine, The Second Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China
| | - Hailong Chen
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China.,Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China
| |
Collapse
|
12
|
Jiao A, Liu H, Ding R, Zheng H, Zhang C, Feng Z, Lei L, Wang X, Su Y, Yang X, Sun C, Zhang L, Bai L, Sun L, Zhang B. Med1 Controls Effector CD8+ T Cell Differentiation and Survival through C/EBPβ-Mediated Transcriptional Control of T-bet. THE JOURNAL OF IMMUNOLOGY 2022; 209:855-863. [DOI: 10.4049/jimmunol.2200037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 06/25/2022] [Indexed: 01/04/2023]
Abstract
Abstract
Effector CD8+ T cells are crucial players in adaptive immunity for effective protection against invading pathogens. The regulatory mechanisms underlying CD8+ T cell effector differentiation are incompletely understood. In this study, we defined a critical role of mediator complex subunit 1 (Med1) in controlling effector CD8+ T cell differentiation and survival during acute bacterial infection. Mice with Med1-deficient CD8+ T cells exhibited significantly impaired expansion with evidently reduced killer cell lectin-like receptor G1+ terminally differentiated and Ly6c+ effector cell populations. Moreover, Med1 deficiency led to enhanced cell apoptosis and expression of multiple inhibitory receptors (programmed cell death 1, T cell Ig and mucin domain–containing-3, and T cell immunoreceptor with Ig and ITIM domains). RNA-sequencing analysis revealed that T-bet– and Zeb2-mediated transcriptional programs were impaired in Med1-deficient CD8+ T cells. Overexpression of T-bet could rescue the differentiation and survival of Med1-deficient CD8+ effector T cells. Mechanistically, the transcription factor C/EBPβ promoted T-bet expression through interacting with Med1 in effector T cells. Collectively, our findings revealed a novel role of Med1 in regulating effector CD8+ T cell differentiation and survival in response to bacterial infection.
Collapse
Affiliation(s)
- Anjun Jiao
- *Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- †Institute of Infection and Immunity, Translational Medicine Institute, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- ‡Key Laboratory of Environment and Genes Related to Diseases, Xi’an Jiaotong University, Ministry of Education, Xi’an, Shaanxi, China
- §Xi’an Key Laboratory of Immune Related Diseases, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Haiyan Liu
- *Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- †Institute of Infection and Immunity, Translational Medicine Institute, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Renyi Ding
- *Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- †Institute of Infection and Immunity, Translational Medicine Institute, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Huiqiang Zheng
- *Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- †Institute of Infection and Immunity, Translational Medicine Institute, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Cangang Zhang
- *Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- †Institute of Infection and Immunity, Translational Medicine Institute, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Zhao Feng
- *Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- †Institute of Infection and Immunity, Translational Medicine Institute, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Lei Lei
- *Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- †Institute of Infection and Immunity, Translational Medicine Institute, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- ‡Key Laboratory of Environment and Genes Related to Diseases, Xi’an Jiaotong University, Ministry of Education, Xi’an, Shaanxi, China
- §Xi’an Key Laboratory of Immune Related Diseases, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Xin Wang
- *Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- †Institute of Infection and Immunity, Translational Medicine Institute, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- ‡Key Laboratory of Environment and Genes Related to Diseases, Xi’an Jiaotong University, Ministry of Education, Xi’an, Shaanxi, China
- §Xi’an Key Laboratory of Immune Related Diseases, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Yanhong Su
- *Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- †Institute of Infection and Immunity, Translational Medicine Institute, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Xiaofeng Yang
- *Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- †Institute of Infection and Immunity, Translational Medicine Institute, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- ‡Key Laboratory of Environment and Genes Related to Diseases, Xi’an Jiaotong University, Ministry of Education, Xi’an, Shaanxi, China
- §Xi’an Key Laboratory of Immune Related Diseases, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Chenming Sun
- *Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- †Institute of Infection and Immunity, Translational Medicine Institute, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- ‡Key Laboratory of Environment and Genes Related to Diseases, Xi’an Jiaotong University, Ministry of Education, Xi’an, Shaanxi, China
- §Xi’an Key Laboratory of Immune Related Diseases, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Lianjun Zhang
- ¶Institute of Systems Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
- ‖Suzhou Institute of Systems Medicine, Suzhou, Jiangsu, China; and
| | - Liang Bai
- #Institute of Cardiovascular Science, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, China
| | - Lina Sun
- *Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- †Institute of Infection and Immunity, Translational Medicine Institute, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- ‡Key Laboratory of Environment and Genes Related to Diseases, Xi’an Jiaotong University, Ministry of Education, Xi’an, Shaanxi, China
- §Xi’an Key Laboratory of Immune Related Diseases, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Baojun Zhang
- *Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- †Institute of Infection and Immunity, Translational Medicine Institute, Xi’an Jiaotong University, Xi’an, Shaanxi, China
- ‡Key Laboratory of Environment and Genes Related to Diseases, Xi’an Jiaotong University, Ministry of Education, Xi’an, Shaanxi, China
- §Xi’an Key Laboratory of Immune Related Diseases, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| |
Collapse
|
13
|
Kihtir Z, Çelik K, Tayfun Küpesiz F, Küpesiz OA, Kocacik Uygun DF, Arayici S, Ongun H, Acarbulut İ, Sağlam C, Ceylaner G, Bingöl A. Specific Granule Deficiency Due To Novel Homozygote SMARCD2 Variant. PEDIATRIC ALLERGY, IMMUNOLOGY, AND PULMONOLOGY 2022; 35:43-46. [PMID: 35320004 DOI: 10.1089/ped.2021.0070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Background: Specific granule deficiency (SGD) is a rare immunodeficiency associated with CCAT/enhancer-binding protein epsilon (CEBPE) gene variants. It can cause severe recurrent infections and is lethal without successful stem cell transplantation. Few cases with SGD of both type 1 and type 2 have been described in the literature. In this study, we present the first report of a case with a novel homozygous c.511 C > T (p.Gln171Ter) mutation in the SMARCD2 gene of SGD type 2, which was successfully treated with bone marrow transplantation. Case: A male infant presented to our neonatal intensive care unit on the second day of life with an icteric appearance and mild hypotonia. He was evaluated for immunodeficiency as the cause of delayed cord separation and refractory neutropenia. At 6 weeks of age, SGD type 2 with a new variant was diagnosed and successfully treated by bone marrow transplantation. Conclusion: SGD is an immunodeficiency disease that is quite rare. However, we believe that SGD diagnosis and associated new variants can be detected more frequently with the widespread use of all whole-exome sequencing techniques.
Collapse
Affiliation(s)
- Zeynep Kihtir
- Department of Neonatology, Akdeniz University Medical Faculty, Antalya, Turkey
| | - Kıymet Çelik
- Department of Neonatology, Akdeniz University Medical Faculty, Antalya, Turkey
| | - Funda Tayfun Küpesiz
- Department of Pediatric Hematology and Oncology, Akdeniz University Medical Faculty, Antalya, Turkey
| | - Osman Alphan Küpesiz
- Department of Pediatric Hematology and Oncology, Akdeniz University Medical Faculty, Antalya, Turkey
| | | | - Sema Arayici
- Department of Neonatology, Akdeniz University Medical Faculty, Antalya, Turkey
| | - Hakan Ongun
- Department of Neonatology, Akdeniz University Medical Faculty, Antalya, Turkey
| | - İpek Acarbulut
- Department of Neonatology, Akdeniz University Medical Faculty, Antalya, Turkey
| | - Celal Sağlam
- Department of Neonatology, Akdeniz University Medical Faculty, Antalya, Turkey
| | - Gülay Ceylaner
- Intergen Genetic and Rare Diseases Diagnosis and Research Center, Ankara, Turkey
| | - Ayşen Bingöl
- Department of Pediatric Allergy and Immunology, Akdeniz University Medical Faculty, Antalya, Turkey
| |
Collapse
|
14
|
Neuronal ApoE4 stimulates C/EBPβ activation, promoting Alzheimer’s disease pathology in a mouse model. Prog Neurobiol 2022; 209:102212. [DOI: 10.1016/j.pneurobio.2021.102212] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 12/05/2021] [Accepted: 12/22/2021] [Indexed: 12/15/2022]
|
15
|
AlSudais H, Rajgara R, Saleh A, Wiper-Bergeron N. C/EBPβ promotes the expression of atrophy-inducing factors by tumours and is a central regulator of cancer cachexia. J Cachexia Sarcopenia Muscle 2022; 13:743-757. [PMID: 35014202 PMCID: PMC8818591 DOI: 10.1002/jcsm.12909] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 10/27/2021] [Accepted: 11/29/2021] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND CCAAT/enhancer-binding protein β (C/EBPβ) is a transcription factor whose high expression in human cancers is associated with tumour aggressiveness and poor outcomes. Most advanced cancer patients will develop cachexia, characterized by loss of skeletal muscle mass. In response to secreted factors from cachexia-inducing tumours, C/EBPβ is stimulated in muscle, leading to both myofibre atrophy and the inhibition of muscle regeneration. Involved in the regulation of immune responses, C/EBPβ induces the expression of many secreted factors, including cytokines. Because tumour-secreted factors drive cachexia and aggressive tumours have higher expression of C/EBPβ, we examined a potential role for C/EBPβ in the expression of tumour-derived cachexia-inducing factors. METHODS We used gain-of-function and loss-of-function approaches in vitro and in vivo to evaluate the role of tumour C/EBPβ expression on the secretion of cachexia-inducing factors. RESULTS We report that C/EBPβ overexpression up-regulates the expression of 260 secreted protein genes, resulting in a secretome that inhibits myogenic differentiation (-31%, P < 0.05) and myotube maturation [-38% (fusion index) and -25% (myotube diameter), P < 0.05]. We find that knockdown of C/EBPβ in cachexia-inducing Lewis lung carcinoma cells restores myogenic differentiation (+25%, P < 0.0001) and myotube diameter (+90%, P < 0.0001) in conditioned medium experiments and, in vivo, prevents muscle wasting (-51% for small myofibres vs. controls, P < 0.01; +140% for large myofibres, P < 0.01). Conversely, overexpression of C/EBPβ in non-cachectic tumours converts their secretome into a cachexia-inducing one, resulting in reduced myotube diameter (-41%, P < 0.0001, EL4 model) and inhibition of differentiation in culture (-26%, P < 0.01, EL4 model) and muscle wasting in vivo (+98% small fibres, P < 0.001; -76% large fibres, P < 0.001). Comparison of the differently expressed transcripts coding for secreted proteins in C/EBPβ-overexpressing myoblasts with the secretome from 27 different types of human cancers revealed ~18% similarity between C/EBPβ-regulated secreted proteins and those secreted by highly cachectic tumours (brain, pancreatic, and stomach cancers). At the protein level, we identified 16 novel secreted factors that are present in human cancer secretomes and are up-regulated by C/EBPβ. Of these, we tested the effect of three factors (SERPINF1, TNFRSF11B, and CD93) on myotubes and found that all had atrophic potential (-33 to -36% for myotube diameter, P < 0.01). CONCLUSIONS We find that C/EBPβ is necessary and sufficient to induce the secretion of cachexia-inducing factors by cancer cells and loss of C/EBPβ in tumours attenuates muscle atrophy in an animal model of cancer cachexia. Our findings establish C/EBPβ as a central regulator of cancer cachexia and an important therapeutic target.
Collapse
Affiliation(s)
- Hamood AlSudais
- Graduate Program in Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Rashida Rajgara
- Graduate Program in Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Aisha Saleh
- Graduate Program in Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Nadine Wiper-Bergeron
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| |
Collapse
|
16
|
Borowska D, Sives S, Vervelde L, Sutton KM. Chicken CSF2 and IL-4-, and CSF2-dependent bone marrow cultures differentiate into macrophages over time. Front Immunol 2022; 13:1064084. [PMID: 36618373 PMCID: PMC9812659 DOI: 10.3389/fimmu.2022.1064084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 12/08/2022] [Indexed: 12/24/2022] Open
Abstract
Chicken bone marrow-derived macrophages (BMMΦ) and dendritic cells (BMDC) are utilized as models to study the mononuclear phagocytic system (MPS). A widely used method to generate macrophages and DC in vitro is to culture bone marrow cells in the presence of colony-stimulating factor-1 (CSF1) to differentiate BMMΦ and granulocyte-macrophage-CSF (GM-CSF, CSF2) and interleukin-4 (IL-4) to differentiate BMDC, while CSF2 alone can lead to the development of granulocyte-macrophage-CSF-derived DC (GMDC). However, in chickens, the MPS cell lineages and their functions represented by these cultures are poorly understood. Here, we decipher the phenotypical, functional and transcriptional differences between chicken BMMΦ and BMDC along with examining differences in DC cultures grown in the absence of IL-4 on days 2, 4, 6 and 8 of culture. BMMΦ cultures develop into a morphologically homogenous cell population in contrast to the BMDC and GMDC cultures, which produce morphologically heterogeneous cell cultures. At a phenotypical level, all cultures contained similar cell percentages and expression levels of MHCII, CD11c and CSF1R-transgene, whilst MRC1L-B expression decreased over time in BMMΦ. All cultures were efficiently able to uptake 0.5 µm beads, but poorly phagocytosed 1 µm beads. Little difference was observed in the kinetics of phagosomal acidification across the cultures on each day of analysis. Temporal transcriptomic analysis indicated that all cultures expressed high levels of CSF3R, MERTK, SEPP1, SPI1 and TLR4, genes associated with macrophages in mammals. In contrast, low levels of FLT3, XCR1 and CAMD1, genes associated with DC, were expressed at day 2 in BMDC and GMDC after which expression levels decreased. Collectively, chicken CSF2 + IL-4- and CSF2-dependent BM cultures represent cells of the macrophage lineage rather than inducing conventional DC.
Collapse
Affiliation(s)
- Dominika Borowska
- The Division of Infection and Immunity, The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, United Kingdom
| | - Samantha Sives
- The Division of Infection and Immunity, The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, United Kingdom
| | - Lonneke Vervelde
- The Division of Infection and Immunity, The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, United Kingdom
| | - Kate M Sutton
- The Division of Infection and Immunity, The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, United Kingdom
| |
Collapse
|
17
|
Liu L, Zhong J, Chen B, Wang W, Xi H, Su X. CCAAT/enhancer binding protein (C/EBP) delta promotes the expression of PTX3 and macrophage phagocytosis during A. fumigatus infection. J Leukoc Biol 2021; 111:1225-1234. [PMID: 34939225 DOI: 10.1002/jlb.4ma1121-451rr] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 11/15/2021] [Accepted: 11/24/2021] [Indexed: 12/22/2022] Open
Abstract
Given the increasing incidence of pulmonary aspergillosis, it is important to understand the natural defense mechanisms by which the body can kill Aspergillus fumigatus conidia. Pentraxin 3 (PTX3) plays a nonredundant role in resistance to A. fumigatus. Here, we found that the key predicted PTX3 transcription factor, CCAAT/enhancer-binding protein δ (CEBPD), was up-regulated during A. fumigatus conidia infection. Functionally, CEBPD significantly promoted the expression of PTX3 and the phagocytic ability of macrophages. Mechanistically, CEBPD activated the PTX3 by directly binding to the promoter region of the PTX3 gene. We also showed that the RNA-binding protein human antigen R promoted CEBPD expression. These findings provide new insights into the crucial role of CEBPD in the phagocytosis of A. fumigatus conidia by macrophages and highlight this protein as a potential therapeutic target for invasive pulmonary aspergillosis.
Collapse
Affiliation(s)
- Lulu Liu
- Department of Respiratory and Critical Care Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China.,Department of Respiratory and Critical Care Medicine, Affiliated Hospital of Nantong University, Nantong, China
| | - Jinjin Zhong
- Department of Respiratory and Critical Care Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Bilin Chen
- Department of Respiratory and Critical Care Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Weiping Wang
- Department of Clinical Laboratory, Jinling Hospital, Nanjing, China
| | - Haiyan Xi
- Department of Clinical Laboratory, Jinling Hospital, Nanjing, China
| | - Xin Su
- Department of Respiratory and Critical Care Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China.,Department of Clinical Laboratory, Jinling Hospital, Nanjing, China
| |
Collapse
|
18
|
AlSudais H, Wiper-Bergeron N. From quiescence to repair: C/EBPβ as a regulator of muscle stem cell function in health and disease. FEBS J 2021; 289:6518-6530. [PMID: 34854237 DOI: 10.1111/febs.16307] [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: 08/13/2021] [Revised: 10/21/2021] [Accepted: 11/30/2021] [Indexed: 11/26/2022]
Abstract
CCAAT/Enhancer Binding protein beta (C/EBPβ) is a transcriptional regulator involved in numerous physiological processes. Herein, we describe a role for C/EBPβ as a regulator of skeletal muscle stem cell function. In particular, C/EBPβ is expressed in muscle stem cells in healthy muscle where it inhibits myogenic differentiation. Downregulation of C/EBPβ expression at the protein and transcriptional level allows for differentiation. Persistence of C/EBPβ promotes stem cell self-renewal and C/EBPβ expression is required for mitotic quiescence in this cell population. As a critical regulator of skeletal muscle homeostasis, C/EBPβ expression is stimulated in pathological conditions such as cancer cachexia, which perturbs muscle regeneration and promotes myofiber atrophy in the context of systemic inflammation. C/EBPβ is also an important regulator of cytokine expression and immune response genes, a mechanism by which it can influence muscle stem cell function. In this viewpoint, we describe a role for C/EBPβ in muscle stem cells and propose a functional intersection between C/EBPβ and NF-kB action in the regulation of cancer cachexia.
Collapse
Affiliation(s)
- Hamood AlSudais
- Graduate Program in Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Canada.,Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Saudi Arabia
| | - Nadine Wiper-Bergeron
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Canada
| |
Collapse
|
19
|
Spek CA, Aberson HL, Butler JM, de Vos AF, Duitman J. CEBPD Potentiates the Macrophage Inflammatory Response but CEBPD Knock-Out Macrophages Fail to Identify CEBPD-Dependent Pro-Inflammatory Transcriptional Programs. Cells 2021; 10:cells10092233. [PMID: 34571881 PMCID: PMC8470509 DOI: 10.3390/cells10092233] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/05/2021] [Accepted: 08/23/2021] [Indexed: 12/25/2022] Open
Abstract
CCAAT/enhancer-binding protein delta (C/EBPδ) is a member of the C/EBP family of transcription factors. According to the current paradigm, C/EBPδ potentiates cytokine production and modulates macrophage function thereby enhancing the inflammatory response. Remarkably, however, C/EBPδ deficiency does not consistently lead to a reduction in Lipopolysaccharide (LPS)-induced cytokine production by macrophages. Here, we address this apparent discrepancy and show that the effect of C/EBPδ on cytokine production and macrophage function depends on both the macrophage subtype and the LPS concentration used. Using CRISPR-Cas generated macrophages in which the transactivation domain of C/EBPδ was deleted from the endogenous locus (ΔTAD macrophages), we next show that the context-dependent role of C/EBPδ in macrophage biology relies on compensatory transcriptional activity in the absence of C/EBPδ. We extend these findings by revealing a large discrepancy between transcriptional programs in C/EBPδ knock-out and C/EBPδ transactivation dead (ΔTAD) macrophages implying that compensatory mechanisms do not specifically modify C/EBPδ-dependent inflammatory responses but affect overall macrophage biology. Overall, these data imply that knock-out approaches are not suited for identifying the genuine transcriptional program regulated by C/EBPδ, and we suggest that this phenomenon applies for transcription factor families in general.
Collapse
Affiliation(s)
- C. Arnold Spek
- Center for Experimental and Molecular Medicine, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (H.L.A.); (J.M.B.); (A.F.d.V.); (J.D.)
- Correspondence:
| | - Hella L. Aberson
- Center for Experimental and Molecular Medicine, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (H.L.A.); (J.M.B.); (A.F.d.V.); (J.D.)
| | - Joe M. Butler
- Center for Experimental and Molecular Medicine, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (H.L.A.); (J.M.B.); (A.F.d.V.); (J.D.)
| | - Alex F. de Vos
- Center for Experimental and Molecular Medicine, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (H.L.A.); (J.M.B.); (A.F.d.V.); (J.D.)
| | - JanWillem Duitman
- Center for Experimental and Molecular Medicine, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (H.L.A.); (J.M.B.); (A.F.d.V.); (J.D.)
- Department of Respiratory Medicine, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| |
Collapse
|
20
|
Xia C, Li M, Ran G, Wang X, Lu Z, Li T, Tang X, Zhang Z, He Q. Redox-responsive nanoassembly restrained myeloid-derived suppressor cells recruitment through autophagy-involved lactate dehydrogenase A silencing for enhanced cancer immunochemotherapy. J Control Release 2021; 335:557-574. [PMID: 34051289 DOI: 10.1016/j.jconrel.2021.05.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 05/24/2021] [Accepted: 05/25/2021] [Indexed: 12/26/2022]
Abstract
Myeloid-derived suppressor cells (MDSCs) are the chief accomplices for assisting tumor's survival and suppressing anti-tumor immunity, which can be recruited by tumor-derived cytokines, such as granulocyte-colony stimulating factor (G-CSF) and granulocyte-macrophage colony stimulating factor (GM-CSF). The plentiful lactate dehydrogenase A (LDHA) in glycolysis is usually accompanied by abundant tumor-derived G-CSF and GM-CSF, further promoting MDSCs recruitment and immunosuppression. Herein, with the aim to achieve powerful anti-tumor immunity, an immunochemotherapy regimen basing on a redox-responsive nanoassembly (R-mPDV/PDV/DOX/siL) is developed, which integrates the combined strategy of restraining cytokines-mediated MDSCs recruitment through LDHA silencing and reinforcing tumor immunogenicity through anthracycline (DOX)-elicited immunogenic cell death (ICD) effects. This redox-responsive nanoassembly is self-assembled by three glutathione (GSH)-responsive polymers, which employ poly(δ-valerolactone) (PVL) as hydrophobic segment and 3, 3'-dithiodipropionic acid (DA) as linkage to connect hydrophilic segment. DOX is encapsulated in the core and LDHA siRNA (siL) is effectively compressed by cationic PAMAM. The cellular internalization and tumor-homing are strengthened by the specific recognition on integrin (αvβ3) by c(RGDfk) (RGD) ligand. After escaping from endosomes/lysosomes, R-mPDV/PDV/DOX/siL is disintegrated through GSH-elicited cleavage of DA, realizing burst release of drugs and high-efficient LDHA silencing. The reduced expression of LDHA suppresses the generation of G-CSF and GM-CSF cytokines, restrains MDSCs recruitment and reinforces anti-tumor immunity. Eventually, this therapeutic regimen of DOX and siL on R-mPDV/PDV/DOX/siL nanoassembly achieved powerful anti-tumor efficiency on 4 T1 orthotopic tumor, opening the new horizons for immunochemotherapy.
Collapse
Affiliation(s)
- Chunyu Xia
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Man Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Guangyao Ran
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Xuhui Wang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Zhengze Lu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Ting Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Xian Tang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Zhirong Zhang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Qin He
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China.
| |
Collapse
|
21
|
Wang ZH, Xia Y, Liu P, Liu X, Edgington-Mitchell L, Lei K, Yu SP, Wang XC, Ye K. ApoE4 activates C/EBPβ/δ-secretase with 27-hydroxycholesterol, driving the pathogenesis of Alzheimer's disease. Prog Neurobiol 2021; 202:102032. [PMID: 33716161 DOI: 10.1016/j.pneurobio.2021.102032] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 01/17/2021] [Accepted: 03/09/2021] [Indexed: 02/06/2023]
Abstract
ApoE4, an apolipoprotein implicated in cholesterol transport and amyloid-β (Aβ) metabolism, is a major genetic risk determinant for Alzheimer's Disease (AD) and drives its pathogenesis via Aβ-dependent and -independent pathways. C/EBPβ, a proinflammatory cytokines-activated transcription factor, is upregulated in AD and mediates cytokines and δ-secretase expression. However, how ApoE4 contributes to AD pathogenesis remains incompletely understood. Here we show that ApoE4 and 27-hydroxycholesterol (27-OHC) co-activate C/EBPβ/δ-secretase signaling in neurons, mediating AD pathogenesis, and this effect is dependent on neuronal secreted Aβ and inflammatory cytokines. Inhibition of cholesterol metabolism with lovastatin diminishes neuronal ApoE4's stimulatory effects. Furthermore, ApoE4 and 27-OHC also mediate lysosomal δ-secretase leakage, activation, secretion and endocytosis. Notably, 27-OHC strongly activates C/EBPβ/δ-secretase pathway in human ApoE4-TR mice and triggers AD pathologies and cognitive deficits, which is blocked by C/EBPβ depletion. Hence, our findings demonstrate that ApoE4 and 27-OHC additively trigger AD pathogenesis via activating C/EBPβ/δ-secretase pathway. Lowering cholesterol levels with statins should benefit the ApoE4 AD carriers.
Collapse
Affiliation(s)
- Zhi-Hao Wang
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA, 30322, USA; Department of Neurology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Yiyuan Xia
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA, 30322, USA; Department of Pathophysiology, Key Laboratory of Ministry of Education of Neurological Diseases, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Pai Liu
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA, 30322, USA; Neuroscience Graduate Program, Laney Graduate School, Emory University, Atlanta, GA, 30322, USA
| | - Xia Liu
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA, 30322, USA
| | - Laura Edgington-Mitchell
- Department of Biochemistry and Molecular Biology, The University of Melbourne, Melbourne Victoria, 3010, Australia
| | - Kecheng Lei
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA, 30322, USA
| | - Shan Ping Yu
- Department of Anesthesiology, Emory University School of Medicine, Emory University, Atlanta, GA, 30322, USA
| | - Xiao-Chuan Wang
- Department of Pathophysiology, Key Laboratory of Ministry of Education of Neurological Diseases, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Co-innovation Center of Neuroregeneration, Nantong University, Nantong, JS, 226001, China.
| | - Keqiang Ye
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA, 30322, USA.
| |
Collapse
|
22
|
C/EBPβ is a key transcription factor for APOE and preferentially mediates ApoE4 expression in Alzheimer's disease. Mol Psychiatry 2021; 26:6002-6022. [PMID: 33339957 PMCID: PMC8758498 DOI: 10.1038/s41380-020-00956-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 10/27/2020] [Accepted: 11/06/2020] [Indexed: 02/06/2023]
Abstract
The apolipoprotein E ε4 (APOE4) allele is a major genetic risk factor for Alzheimer's disease (AD), and its protein product, ApoE4, exerts its deleterious effects mainly by influencing amyloid-β (Aβ) and Tau (neurofibrillary tangles, NFTs) deposition in the brain. However, the molecular mechanism dictating its expression during ageing and in AD remains incompletely clear. Here we show that C/EBPβ acts as a pivotal transcription factor for APOE and mediates its mRNA levels in an age-dependent manner. C/EBPβ binds the promoter of APOE and escalates its expression in the brain. Knockout of C/EBPβ in AD mouse models diminishes ApoE expression and Aβ pathologies, whereas overexpression of C/EBPβ accelerates AD pathologies, which can be attenuated by anti-ApoE monoclonal antibody or deletion of ApoE via its specific shRNA. Remarkably, C/EBPβ selectively promotes more ApoE4 expression versus ApoE3 in human neurons, correlating with higher activation of C/EBPβ in human AD brains with ApoE4/4 compared to ApoE3/3. Therefore, our data support that C/EBPβ is a crucial transcription factor for temporally regulating APOE gene expression, modulating ApoE4's role in AD pathogenesis.
Collapse
|
23
|
Pinheiro D, Mawhin MA, Prendecki M, Woollard KJ. In-silico analysis of myeloid cells across the animal kingdom reveals neutrophil evolution by colony-stimulating factors. eLife 2020; 9:60214. [PMID: 33236983 PMCID: PMC7717901 DOI: 10.7554/elife.60214] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 11/24/2020] [Indexed: 12/12/2022] Open
Abstract
Neutrophils constitute the largest population of phagocytic granulocytes in the blood of mammals. The development and function of neutrophils and monocytes is primarily governed by the granulocyte colony-stimulating factor receptor family (CSF3R/CSF3) and macrophage colony-stimulating factor receptor family (CSF1R/IL34/CSF1) respectively. Using various techniques this study considered how the emergence of receptor:ligand pairings shaped the distribution of blood myeloid cell populations. Comparative gene analysis supported the ancestral pairings of CSF1R/IL34 and CSF3R/CSF3, and the emergence of CSF1 later in lineages after the advent of Jawed/Jawless fish. Further analysis suggested that the emergence of CSF3 lead to reorganisation of granulocyte distribution between amphibian and early reptiles. However, the advent of endothermy likely contributed to the dominance of the neutrophil/heterophil in modern-day mammals and birds. In summary, we show that the emergence of CSF3R/CSF3 was a key factor in the subsequent evolution of the modern-day mammalian neutrophil.
Collapse
Affiliation(s)
- Damilola Pinheiro
- Centre for Inflammatory Disease, Department of Immunology and Inflammation, Imperial College London, London, United Kingdom
| | - Marie-Anne Mawhin
- Centre for Inflammatory Disease, Department of Immunology and Inflammation, Imperial College London, London, United Kingdom
| | - Maria Prendecki
- Centre for Inflammatory Disease, Department of Immunology and Inflammation, Imperial College London, London, United Kingdom
| | - Kevin J Woollard
- Centre for Inflammatory Disease, Department of Immunology and Inflammation, Imperial College London, London, United Kingdom
| |
Collapse
|
24
|
Geiger SS, Essers MAG. Inflammation's Epigenetic Footprint in Hematopoietic Stem Cells. Cell Stem Cell 2020; 26:611-612. [PMID: 32386549 DOI: 10.1016/j.stem.2020.04.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Immune memory was thought to be unique to cells of the adaptive immune system. In this issue of Cell Stem Cell, de Laval et al. (2020) describe persistent epigenetic modifications in hematopoietic stem cells following an inflammatory insult with LPS as a mechanism by which immune memory may be established.
Collapse
Affiliation(s)
- Sarah S Geiger
- Division Inflammatory Stress in Stem Cells, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGMBH), 69120 Heidelberg, Germany
| | - Marieke A G Essers
- Division Inflammatory Stress in Stem Cells, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGMBH), 69120 Heidelberg, Germany; DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany.
| |
Collapse
|
25
|
Niu L, Zheng Z, Xue Q, Cheng H, Liu Y, Wang H, Hu X, Zhang A, Liu B, Xu X. Two coupled mutations abolished the binding of CEBPB to the promoter of CXCL14 that displayed an antiviral effect on PRRSV by activating IFN signaling. FASEB J 2020; 34:11257-11271. [PMID: 32648265 DOI: 10.1096/fj.202000477r] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 06/19/2020] [Accepted: 06/29/2020] [Indexed: 11/11/2022]
Abstract
Porcine reproductive and respiratory syndrome (PRRS) is the most economically important infectious disease of pigs worldwide. Our previous study revealed that Tongcheng (TC) pigs display higher resistance to PRRS than Largewhite (LW) pigs, but the genetic mechanism remains unknown. Here, we first confirmed that CXCL14 was downregulated in lungs and porcine alveolar macrophages (PAMs) responding to PRRS virus (PRRSV) infection, but the decline in LW pigs was more obvious than that in TC pigs. Then, we found that the overexpression of CXCL14 activated type-I interferon (IFN-I) signaling by upregulating interferon beta (IFNB), which plays a major role in the antiviral effect. To further decipher the mechanism underlying its differential expression, we characterized the core promoter of CXCL14 as being located from -145 to 276 bp of the transcription start site (TSS) and identified two main haplotypes that displayed significant differential transcriptional activities. We further identified two coupled point mutations that altered the binding status of CEBPB and were responsible for the differential expression in TC and LW pigs. The regulatory effect of CEBPB on CXCL14 was further confirmed by RNA interference (RNAi) and chromatin immunoprecipitation (ChIP), providing crucial clues for deciphering the mechanism of CXCL14 downregulation in unusual conditions. The present study revealed the potential antiviral effect of CXCL14, occurring via activation of interferon signaling, and suggested that CXCL14 contributes to the PRRS resistance of TC pigs.
Collapse
Affiliation(s)
- Lizhu Niu
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education & College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, China.,Key Lab of Freshwater Animal Breeding, College of Fishery, Huazhong Agricultural University, Wuhan, China
| | - Zhiwei Zheng
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education & College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, China
| | - Qianjing Xue
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education & College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, China
| | - Huijun Cheng
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education & College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Ying Liu
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education & College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, China
| | - Huanling Wang
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education & College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China.,Key Lab of Freshwater Animal Breeding, College of Fishery, Huazhong Agricultural University, Wuhan, China
| | - Xueying Hu
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, China
| | - Anding Zhang
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, China
| | - Bang Liu
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education & College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, China.,Key Lab of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs, Wuhan, China
| | - Xuewen Xu
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education & College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, China.,Key Lab of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs, Wuhan, China
| |
Collapse
|
26
|
Emerging Role of C/EBPβ and Epigenetic DNA Methylation in Ageing. Trends Genet 2020; 36:71-80. [DOI: 10.1016/j.tig.2019.11.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/31/2019] [Accepted: 11/12/2019] [Indexed: 12/11/2022]
|
27
|
Salotti J, Johnson PF. Regulation of senescence and the SASP by the transcription factor C/EBPβ. Exp Gerontol 2019; 128:110752. [PMID: 31648009 DOI: 10.1016/j.exger.2019.110752] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 10/09/2019] [Accepted: 10/14/2019] [Indexed: 12/19/2022]
Abstract
Oncogene-induced senescence (OIS) serves as an important barrier to tumor progression in cells that have acquired activating mutations in RAS and other oncogenes. Senescent cells also produce a secretome known as the senescence-associated secretory phenotype (SASP) that includes pro-inflammatory cytokines and chemokines. SASP factors reinforce and propagate the senescence program and identify senescent cells to the immune system for clearance. The OIS program is executed by several transcriptional effectors that include p53, RB, NF-κB and C/EBPβ. In this review, we summarize the critical role of C/EBPβ in regulating OIS and the SASP. Post-translational modifications induced by oncogenic RAS signaling control C/EBPβ activity and dimerization, and these alterations switch C/EBPβ to a pro-senescence form during OIS. In addition, C/EBPβ is regulated by a unique 3'UTR-mediated mechanism that restrains its activity in tumor cells to facilitate senescence bypass and suppression of the SASP.
Collapse
Affiliation(s)
- Jacqueline Salotti
- Mouse Cancer Genetics Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA
| | - Peter F Johnson
- Mouse Cancer Genetics Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA.
| |
Collapse
|
28
|
Lu X, Nagata M, Yamasaki S. Mincle: 20 years of a versatile sensor of insults. Int Immunol 2019; 30:233-239. [PMID: 29726997 DOI: 10.1093/intimm/dxy028] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Accepted: 04/28/2018] [Indexed: 12/11/2022] Open
Abstract
Macrophage-inducible C-type lectin, better known as Mincle, is a member of the C-type lectin receptor family and is encoded by Clec4e. Mincle was an orphan receptor for a long time after having been discovered as a lipopolysaccharide-induced protein, yet later an adjuvant glycolipid in mycobacteria-trehalose dimycolate-was identified as a ligand. Ligands for Mincle were also found existing in bacteria, fungi and even mammals. When confronted with foreign elements, Mincle can recognize characteristic pathogen-associated molecular patterns, mostly glycolipids, from Mycobacterium tuberculosis and other pathogens, and thus induce immune responses against infection. To maintain self-homeostasis, Mincle can recognize lipid-based damage-associated molecular patterns, thereby monitoring the internal environment. The mechanism by which Mincle functions in the immune system is also becoming more clear along with the identification of its ligands. Being expressed widely on antigen-presenting cells, Mincle activation leads to the production of cytokines and chemokines, neutrophil infiltration and other inflammatory responses. Besides, Mincle can induce acquired immunity such as antigen-specific T-cell responses and antibody production as an adjuvant receptor. In this review, we will retrospectively sketch the discovery and study of Mincle, and outline some current work on this receptor.
Collapse
Affiliation(s)
- Xiuyuan Lu
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Yamadaoka, Suita, Osaka, Japan.,Laboratory of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Yamadaoka, Suita, Osaka, Japan.,Division of Molecular Immunology, Medical Institute of Bioregulation, Kyushu University, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Masahiro Nagata
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Yamadaoka, Suita, Osaka, Japan
| | - Sho Yamasaki
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Yamadaoka, Suita, Osaka, Japan.,Laboratory of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Yamadaoka, Suita, Osaka, Japan.,Division of Molecular Immunology, Medical Institute of Bioregulation, Kyushu University, Maidashi, Higashi-ku, Fukuoka, Japan.,Division of Molecular Immunology, Medical Mycology Research Center, Chiba University, Inohana, Chuo-ku, Chiba, Japan
| |
Collapse
|
29
|
Yazawa T, Imamichi Y, Yuhki KI, Uwada J, Mikami D, Shimada M, Miyamoto K, Kitano T, Takahashi S, Sekiguchi T, Suzuki N, Rafiqul Islam Khan M, Ushikubi F, Umezawa A, Taniguchi T. Cyclooxygenase-2 is acutely induced by CCAAT/enhancer-binding protein β to produce prostaglandin E 2 and F 2α following gonadotropin stimulation in Leydig cells. Mol Reprod Dev 2019; 86:786-797. [PMID: 31087493 DOI: 10.1002/mrd.23163] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 04/01/2019] [Accepted: 04/13/2019] [Indexed: 12/14/2022]
Abstract
Cyclooxygenase 2 (COX-2) is an inducible rate-limiting enzyme for prostanoid production. Because COX-2 represents one of the inducible genes in mouse mesenchymal stem cells upon differentiation into Leydig cells, we investigated COX-2 expression and production of prostaglandin (PG) in Leydig cells. Although COX-2 was undetectable in mouse testis, it was transiently induced in Leydig cells by human chorionic gonadotropin (hCG) administration. Consistent with the finding that Leydig cells expressed aldo-keto reductase 1B7 (PGF synthase) and PGE synthase 2, induction of COX-2 by hCG caused a marked increase in testicular PGF 2α and PGE 2 levels. Using mouse Leydig cell tumor-derived MA-10 cells as a model, it was indicated by reporter assays and electron mobility shift assays that transcription of the COX-2 gene was activated by CCAAT/enhancer-binding protein β (C/EBPβ) with cAMP-stimulation. C/EBPβ expression was induced by cAMP-stimulation, whereas expression of C/EBP homolog protein (CHOP) was robustly downregulated. Transfection of CHOP expression plasmid inhibited cAMP-induced COX-2 promoter activity. In addition, CHOP reduced constitutive COX-2 expression in other mouse Leydig cell tumor-derived TM3 cells. These results indicate that COX-2 is induced in Leydig cells by activation of C/EBPβ via reduction of CHOP expression upon gonadotropin-stimulation to produce PGF 2α and PGE 2 .
Collapse
Affiliation(s)
- Takashi Yazawa
- Department of Biochemistry, Asahikawa Medical University, Asahikawa, Japan
| | - Yoshitaka Imamichi
- Department of Pharmacology, Asahikawa Medical University, Asahikawa, Japan
| | - Koh-Ichi Yuhki
- Department of Pharmacology, Asahikawa Medical University, Asahikawa, Japan
| | - Junsuke Uwada
- Department of Biochemistry, Asahikawa Medical University, Asahikawa, Japan
| | - Daisuke Mikami
- Department of Nephrology, Asahikawa Medical University, Asahikawa, Japan
| | - Masayuki Shimada
- Laboratory of Reproductive Endocrinology, Graduate School of Biosphere Sciences, Hiroshima University, Higashi-Hiroshima, Japan
| | - Kaoru Miyamoto
- Department of Biochemistry, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Takeshi Kitano
- Department of Materials and Life Science, Graduate School of Science and Technology, Kumamoto University, Kumamoto, Japan
| | - Satoru Takahashi
- Department of Pediatrics, Asahikawa Medical University, Asahikawa, Japan
| | - Toshio Sekiguchi
- The Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University, Ishikawa, Japan
| | - Nobuo Suzuki
- The Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University, Ishikawa, Japan
| | - Md Rafiqul Islam Khan
- Department of Biochemistry, Asahikawa Medical University, Asahikawa, Japan.,Department of Pharmacy, University of Rajshahi, Rajshahi, Bangladesh
| | - Fumitaka Ushikubi
- Department of Pharmacology, Asahikawa Medical University, Asahikawa, Japan
| | - Akihiro Umezawa
- Department of Reproductive Biology, Center for Regenerative Medicine, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Takanobu Taniguchi
- Department of Biochemistry, Asahikawa Medical University, Asahikawa, Japan
| |
Collapse
|
30
|
Guindi C, Cloutier A, Gaudreau S, Zerif E, McDonald PP, Tatsiy O, Asselin C, Dupuis G, Gris D, Amrani AA. Role of the p38 MAPK/C/EBPβ Pathway in the Regulation of Phenotype and IL-10 and IL-12 Production by Tolerogenic Bone Marrow-Derived Dendritic Cells. Cells 2018; 7:cells7120256. [PMID: 30544623 PMCID: PMC6316502 DOI: 10.3390/cells7120256] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 11/28/2018] [Accepted: 12/04/2018] [Indexed: 01/06/2023] Open
Abstract
Dendritic cells (DCs) play a major role in innate and adaptive immunity and self-immune tolerance. Immunogenic versus tolerogenic DC functions are dictated by their levels of costimulatory molecules and their cytokine expression profile. The transcription factor C/EBPβ regulates the expression of several inflammatory genes in many cell types including macrophages. However, little is known regarding the role of C/EBPβ in tolerogenic versus immunogenic DCs functions. We have previously reported that bone marrow-derived DCs generated with GM-CSF (GM/DCs) acquire the signature of semi-mature tolerogenic IL-10-producing DCs as opposed to immunogenic DCs generated with GM-CSF and IL-4 (IL-4/DCs). Here, we show that tolerogenic GM/DCs exhibit higher levels of phosphorylation and enhanced DNA binding activity of C/EBPβ and CREB than immunogenic IL-4/DCs. We also show that the p38 MAPK/CREB axis and GSK3 play an important role in regulating C/EBPβ phosphorylation and DNA binding activity. Inhibition of p38 MAPK in GM/DCs resulted in a drastic decrease of C/EBPβ and CREB DNA binding activities, a reduction of their IL-10 production and an increase of their IL-12p70 production, a characteristic of immunogenic IL-4/DCs. We also present evidence that GSK3 inhibition in GM/DCs reduced C/EBPβ DNA binding activity and increased expression of costimulatory molecules in GM/DCs and their production of IL-10. Analysis of GM/DCs of C/EBPβ-/- mice showed that C/EBPβ was essential to maintain the semimature phenotype and the production of IL-10 as well as low CD4⁺ T cell proliferation. Our results highlight the importance of the p38MAPK-C/EBPβ pathway in regulating phenotype and function of tolerogenic GM/DCs.
Collapse
Affiliation(s)
- Chantal Guindi
- Immunology Division, Faculty of Medicine and Health Sciences and Centre de Recherche du CHUS, 3001, 12th Avenue North, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada.
| | - Alexandre Cloutier
- Immunology Division, Faculty of Medicine and Health Sciences and Centre de Recherche du CHUS, 3001, 12th Avenue North, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada.
| | - Simon Gaudreau
- Immunology Division, Faculty of Medicine and Health Sciences and Centre de Recherche du CHUS, 3001, 12th Avenue North, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada.
| | - Echarki Zerif
- Immunology Division, Faculty of Medicine and Health Sciences and Centre de Recherche du CHUS, 3001, 12th Avenue North, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada.
| | - Patrick P McDonald
- Immunology Division, Faculty of Medicine and Health Sciences and Centre de Recherche du CHUS, 3001, 12th Avenue North, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada.
| | - Olga Tatsiy
- Immunology Division, Faculty of Medicine and Health Sciences and Centre de Recherche du CHUS, 3001, 12th Avenue North, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada.
| | - Claude Asselin
- Immunology Division, Faculty of Medicine and Health Sciences and Centre de Recherche du CHUS, 3001, 12th Avenue North, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada.
| | - Gilles Dupuis
- Immunology Division, Faculty of Medicine and Health Sciences and Centre de Recherche du CHUS, 3001, 12th Avenue North, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada.
| | - Denis Gris
- Immunology Division, Faculty of Medicine and Health Sciences and Centre de Recherche du CHUS, 3001, 12th Avenue North, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada.
| | - And Abdelaziz Amrani
- Immunology Division, Faculty of Medicine and Health Sciences and Centre de Recherche du CHUS, 3001, 12th Avenue North, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada.
| |
Collapse
|
31
|
Wu P, Du L, Hou S, Su G, Yang L, Hu J, Deng J, Cao Q, Yuan G, Zhou C, Kijlstra A, Yang P. Association of LACC1, CEBPB- PTPN1, RIPK2 and ADO-EGR2 with ocular Behcet's disease in a Chinese Han population. Br J Ophthalmol 2018; 102:1308-1314. [PMID: 29907633 PMCID: PMC6104672 DOI: 10.1136/bjophthalmol-2017-311753] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 04/23/2018] [Accepted: 05/24/2018] [Indexed: 02/06/2023]
Abstract
Background An Immunochip study recently identified the association of a number of new genetic loci with Behcet’s disease (BD). Objective To confirm the association between new genetic loci reported in an Immunochip study and BD in a Han Chinese population. Methods A two-stage association study was carried out in 1238 patients with BD and 1458 healthy controls. Twenty-two candidate single nucleotide polymorphisms (SNPs) were selected for genotyping by iPLEXGold genotyping or TaqMan SNP assays and a meta-analysis was performed for significantly associated markers. Results The results showed that four SNPs (LACC1/rs9316059, CEBPB-PTPN1/rs913678, ADO-EGR2/rs224127 and RIPK2/rs10094579) were associated with BD in an allelic association test (rs9316059 T allele: pc=4.95×10−8, OR=0.687; rs913678 C allele: pc=3.01×10−4, OR=1.297; rs224127 A allele: pc=3.77×10−4, OR=1.274; rs10094579 A allele: pc=6.93×10−4, OR=1.302). For four SNPs tested by meta-analysis, the association with BD was strengthened and all exceeded genome-wide significance (rs9316059: p=2.96×10−16; rs913678: p=2.09×10−16; rs224127: p=5.28×10−13; rs10094579: p=9.21×10−11). Conclusions Our findings confirmed the association of four loci (LACC1, CEBPB-PTPN1, ADO-EGR2 and RIPK2) in Chinese Han patients with BD.
Collapse
Affiliation(s)
- Pengcheng Wu
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing, China.,Lanzhou University Second Hospital, Lanzhou, Gansu, China
| | - Liping Du
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing, China
| | - Shengping Hou
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing, China
| | - Guannan Su
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing, China
| | - Lu Yang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing, China.,Lanzhou University Second Hospital, Lanzhou, Gansu, China
| | - Jiayue Hu
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing, China.,Lanzhou University Second Hospital, Lanzhou, Gansu, China
| | - Jing Deng
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing, China
| | - Qingfeng Cao
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing, China
| | - Gangxiang Yuan
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing, China
| | - Chunjiang Zhou
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing, China
| | - Aize Kijlstra
- University Eye Clinic Maastricht, Maastricht, The Netherlands
| | - Peizeng Yang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing, China
| |
Collapse
|
32
|
Bégay V, Baumeier C, Zimmermann K, Heuser A, Leutz A. The C/EBPβ LIP isoform rescues loss of C/EBPβ function in the mouse. Sci Rep 2018; 8:8417. [PMID: 29849099 PMCID: PMC5976626 DOI: 10.1038/s41598-018-26579-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 03/22/2018] [Indexed: 12/26/2022] Open
Abstract
The transcription factor C/EBPβ regulates hematopoiesis, bone, liver, fat, and skin homeostasis, and female reproduction. C/EBPβ protein expression from its single transcript occurs by alternative in-frame translation initiation at consecutive start sites to generate three isoforms, two long (LAP*, LAP) and one truncated (LIP), with the same C-terminal bZip dimerization domain. The long C/EBPβ isoforms are considered gene activators, whereas the LIP isoform reportedly acts as a dominant-negative repressor. Here, we tested the putative repressor functions of the C/EBPβ LIP isoform in mice by comparing monoallelic WT or LIP knockin mice with Cebpb knockout mice, in combination with monoallelic Cebpa mice. The C/EBPβ LIP isoform was sufficient to function in coordination with C/EBPα in murine development, adipose tissue and sebocyte differentiation, and female fertility. Thus, the C/EBPβ LIP isoform likely has more physiological functions than its currently known role as a dominant-negative inhibitor, which are more complex than anticipated.
Collapse
Affiliation(s)
- Valérie Bégay
- Tumorigenesis and Cell Differentiation, Max Delbrueck Center for Molecular Medicine, Berlin, 13125, Berlin, Germany. .,Molecular Physiology of Somatic Sensation, Max Delbrueck Center for Molecular Medicine, Berlin, 13125, Berlin, Germany.
| | - Christian Baumeier
- Tumorigenesis and Cell Differentiation, Max Delbrueck Center for Molecular Medicine, Berlin, 13125, Berlin, Germany.,Department of experimental Diabetology (DIAB), German Institute of Human Nutrition Potsdam-Rehbruecke (DifE), 14558, Nuthetal, Germany, German Center for Diabetes Research (DZD), München-Neuherberg, Germany
| | - Karin Zimmermann
- Tumorigenesis and Cell Differentiation, Max Delbrueck Center for Molecular Medicine, Berlin, 13125, Berlin, Germany
| | - Arnd Heuser
- Pathophysiology Group, Max Delbrueck Center for Molecular Medicine, Berlin, 13125, Berlin, Germany
| | - Achim Leutz
- Tumorigenesis and Cell Differentiation, Max Delbrueck Center for Molecular Medicine, Berlin, 13125, Berlin, Germany. .,Humboldt-University, Berlin, Institute of Biology, 10115, Berlin, Germany.
| |
Collapse
|
33
|
C/EBPβ regulates delta-secretase expression and mediates pathogenesis in mouse models of Alzheimer's disease. Nat Commun 2018; 9:1784. [PMID: 29725016 PMCID: PMC5934399 DOI: 10.1038/s41467-018-04120-z] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 04/05/2018] [Indexed: 01/21/2023] Open
Abstract
Delta-secretase cleaves both APP and Tau to mediate the formation of amyloid plaques and neurofibrillary tangle in Alzheimer’s disease (AD). However, how aging contributes to an increase in delta-secretase expression and AD pathologies remains unclear. Here we show that a CCAAT-enhancer-binding protein (C/EBPβ), an inflammation-regulated transcription factor, acts as a key age-dependent effector elevating both delta-secretase (AEP) and inflammatory cytokines expression in mediating pathogenesis in AD mouse models. We find that C/EBPβ regulates delta-secretase transcription and protein levels in an age-dependent manner. Overexpression of C/EBPβ in young 3xTg mice increases delta-secretase and accelerates the pathological features including cognitive dysfunctions, which is abolished by inactive AEP C189S. Conversely, depletion of C/EBPβ from old 3xTg or 5XFAD mice diminishes delta-secretase and reduces AD pathologies, leading to amelioration of cognitive impairment in these AD mouse models. Thus, our findings support that C/EBPβ plays a pivotal role in AD pathogenesis via increasing delta-secretase expression. Delta-secretase cleaves both APP and Tau, and contributes to Alzheimer’s disease-like pathology. Here the authors show that C/EBPβ, a regulator of inflammation, also regulates transcription of delta-secretase in an age-dependent manner and contributes to Alzheimer’s disease-like pathology in mouse models.
Collapse
|
34
|
Saito K, Takahashi K, Huang B, Asahara M, Kiso H, Togo Y, Tsukamoto H, Mishima S, Nagata M, Iida M, Tokita Y, Asai M, Shimizu A, Komori T, Harada H, MacDougall M, Sugai M, Bessho K. Loss of Stemness, EMT, and Supernumerary Tooth Formation in Cebpb -/-Runx2 +/- Murine Incisors. Sci Rep 2018; 8:5169. [PMID: 29581460 PMCID: PMC5980103 DOI: 10.1038/s41598-018-23515-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 03/14/2018] [Indexed: 01/19/2023] Open
Abstract
Adult Cebpb KO mice incisors present amelogenin-positive epithelium pearls, enamel and dentin allopathic hyperplasia, fewer Sox2-positive cells in labial cervical loop epitheliums, and reduced Sox2 expression in enamel epithelial stem cells. Thus, Cebpb acts upstream of Sox2 to regulate stemness. In this study, Cebpb KO mice demonstrated cementum-like hard tissue in dental pulp, loss of polarity by ameloblasts, enamel matrix in ameloblastic layer, and increased expression of epithelial-mesenchymal transition (EMT) markers in a Cebpb knockdown mouse enamel epithelial stem cell line. Runx2 knockdown in the cell line presented a similar expression pattern. Therefore, the EMT enabled disengaged odontogenic epithelial stem cells to develop supernumerary teeth. Cebpb and Runx2 knockdown in the cell line revealed higher Biglycan and Decorin expression, and Decorin-positive staining in the periapical region, indicating their involvement in supernumerary tooth formation. Cebpb and Runx2 acted synergistically and played an important role in the formation of supernumerary teeth in adult incisors.
Collapse
Affiliation(s)
- Kazuyuki Saito
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Department of Perinatology, Institute for Developmental Research, Aichi Human Service Center, Kasugai, Aichi, Japan
| | - Katsu Takahashi
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - Boyen Huang
- School of Dentistry and Health Sciences, Faculty of Science, Charles Sturt University, Leeds Parade Orange, NSW 2800, Australia
| | - Masakazu Asahara
- Division of Liberal Arts and Sciences, Aichi Gakuin University, Aichi, Japan
| | - Honoka Kiso
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yumiko Togo
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hiroko Tsukamoto
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Sayaka Mishima
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Masaki Nagata
- Department of Oral and Maxillofacial Surgery Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Machiko Iida
- Department of Perinatology, Institute for Developmental Research, Aichi Human Service Center, Kasugai, Aichi, Japan
| | - Yoshihito Tokita
- Department of Perinatology, Institute for Developmental Research, Aichi Human Service Center, Kasugai, Aichi, Japan
| | - Masato Asai
- Department of Perinatology, Institute for Developmental Research, Aichi Human Service Center, Kasugai, Aichi, Japan
| | - Akira Shimizu
- Department of Experimental Therapeutics, Institute for Advancement of Clinical and Translational Science, Kyoto University Hospital, Kyoto, Japan
| | - Toshihisa Komori
- Department of Cell Biology, Unit of Basic Medical Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hidemitsu Harada
- The Advanced Oral Health Science Research Center, Iwate Medical University, Iwate, Japan
| | - Mary MacDougall
- Facultyl of Dentistry, University of British Columbia, Vancouver, Canada
| | - Manabu Sugai
- Department of Molecular Genetics, Division of Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan.
| | - Kazuhisa Bessho
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| |
Collapse
|
35
|
CREB coactivators CRTC2 and CRTC3 modulate bone marrow hematopoiesis. Proc Natl Acad Sci U S A 2017; 114:11739-11744. [PMID: 29078378 DOI: 10.1073/pnas.1712616114] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Populations of circulating immune cells are maintained in equilibrium through signals that enhance the retention or egress of hematopoietic stem cells (HSCs) from bone marrow (BM). Prostaglandin E2 (PGE2) stimulates HSC renewal and engraftment through, for example, induction of the cAMP pathway. Triggering of PGE2 receptors increases HSC survival in part via the PKA-mediated induction of the cAMP response element-binding protein (CREB) signaling pathway. PKA stimulates cellular gene expression by phosphorylating CREB at Ser133 and by promoting the dephosphorylation of the cAMP- responsive transcriptional coactivators (CRTCs). We show here that disruption of both CRTC2 and CRTC3 causes embryonic lethality, and that a single allele of either CRTC2 or CRTC3 is sufficient for viability. CRTC2 knockout mice that express one CRTC3 allele (CRTC2/3m mice) develop neutrophilia and splenomegaly in adulthood due to the up-regulation of granulocyte-colony stimulating factor (G-CSF); these effects are reversed following administration of neutralizing anti-G-CSF antiserum. Adoptive transfer of CRTC2/3m BM conferred the splenomegaly/neutrophilia phenotype in WT recipients. Targeted disruption of both CRTC2 and CRTC3 in stromal cells with a mesenchymal Prx1-Cre transgene also promoted this phenotype. Depletion of CRTC2/3 was found to decrease the expression of Suppressor of Cytokine Signaling 3 (SOCS3), leading to increases in STAT3 phosphorylation and to the induction of CEBPβ, a key regulator of the G-CSF gene. As small molecule inhibition of JAK activity disrupted CEBPβ induction and reduced G-CSF expression in CRTC2/3m stromal cells, our results demonstrate how cross-coupling between the CREB/CRTC and JAK/STAT pathways contributes to BM homeostasis.
Collapse
|
36
|
EMMPRIN (CD147) is induced by C/EBPβ and is differentially expressed in ALK+ and ALK- anaplastic large-cell lymphoma. J Transl Med 2017; 97:1095-1102. [PMID: 28581487 DOI: 10.1038/labinvest.2017.54] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 04/12/2017] [Accepted: 04/14/2017] [Indexed: 01/11/2023] Open
Abstract
Anaplastic lymphoma kinase-positive (ALK+) anaplastic large-cell lymphoma (ALCL) is characterized by expression of oncogenic ALK fusion proteins due to the translocation t(2;5)(p23;q35) or variants. Although genotypically a T-cell lymphoma, ALK+ ALCL cells frequently show loss of T-cell-specific surface antigens and expression of monocytic markers. C/EBPβ, a transcription factor constitutively overexpressed in ALK+ ALCL cells, has been shown to play an important role in the activation and differentiation of macrophages and is furthermore capable of transdifferentiating B-cell and T-cell progenitors to macrophages in vitro. To analyze the role of C/EBPβ for the unusual phenotype of ALK+ ALCL cells, C/EBPβ was knocked down by RNA interference in two ALK+ ALCL cell lines, and surface antigen expression profiles of these cell lines were generated using a Human Cell Surface Marker Screening Panel (BD Biosciences). Interesting candidate antigens were further analyzed by immunohistochemistry in primary ALCL ALK+ and ALK- cases. Antigen expression profiling revealed marked changes in the expression of the activation markers CD25, CD30, CD98, CD147, and CD227 after C/EBPβ knockdown. Immunohistochemical analysis confirmed a strong, membranous CD147 (EMMPRIN) expression in ALK+ ALCL cases. In contrast, ALK- ALCL cases showed a weaker CD147 expression. CD274 or PD-L1, an immune inhibitory receptor ligand, was downregulated after C/EBPβ knockdown. PD-L1 also showed stronger expression in ALK+ ALCL compared with ALK- ALCL, suggesting an additional role of C/EBPβ in ALK+ ALCL in generating an immunosuppressive environment. Finally, no expression changes of T-cell or monocytic markers were detected. In conclusion, surface antigen expression profiling demonstrates that C/EBPβ plays a critical role in the activation state of ALK+ ALCL cells and reveals CD147 and PD-L1 as important downstream targets. The multiple roles of CD147 in migration, adhesion, and invasion, as well as T-cell activation and proliferation suggest its involvement in the pathogenesis of ALCL.
Collapse
|
37
|
C/EBPβ is required for survival of Ly6C - monocytes. Blood 2017; 130:1809-1818. [PMID: 28807982 DOI: 10.1182/blood-2017-03-772962] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 08/07/2017] [Indexed: 02/06/2023] Open
Abstract
The transcription factor CCAAT/enhancer-binding protein β (C/EBPβ) is highly expressed in monocytes/macrophages. However, its roles in monopoiesis are largely unknown. Here, we investigated the roles of C/EBPβ in monopoiesis. Further subdivision of monocytes revealed that Cebpb messenger RNA was highly upregulated in Ly6C- monocytes in bone marrow. Accordingly, the number of Ly6C- monocytes was significantly reduced in Cebpb-/- mice. Bone marrow chimera experiments and Mx1-Cre-mediated deletion of Cebpb revealed a cell-intrinsic and monocyte-specific requirement for C/EBPβ in monopoiesis. In Cebpb-/- mice, turnover of Ly6C- monocytes was highly accelerated and apoptosis of Ly6C- monocytes was increased. Expression of Csf1r, which encodes a receptor for macrophage colony-stimulating factor, was significantly reduced in Ly6C- monocytes of Cebpb-/- mice. C/EBPβ bound to positive regulatory elements of Csf1r and promoted its transcription. Collectively, these results indicate that C/EBPβ is a critical factor for Ly6C- monocyte survival, at least in part through upregulation of Csf1r.
Collapse
|
38
|
Monticelli S, Natoli G. Transcriptional determination and functional specificity of myeloid cells: making sense of diversity. Nat Rev Immunol 2017; 17:595-607. [DOI: 10.1038/nri.2017.51] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
39
|
Charó NL, Rodríguez Ceschan MI, Galigniana NM, Toneatto J, Piwien-Pilipuk G. Organization of nuclear architecture during adipocyte differentiation. Nucleus 2017; 7:249-69. [PMID: 27416359 DOI: 10.1080/19491034.2016.1197442] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Obesity is a serious health problem worldwide since it is a major risk factor for chronic diseases such as type II diabetes. Obesity is the result of hyperplasia (associated with increased adipogenesis) and hypertrophy (associated with decreased adipogenesis) of the adipose tissue. Therefore, understanding the molecular mechanisms underlying the process of adipocyte differentiation is relevant to delineate new therapeutic strategies for treatment of obesity. As in all differentiation processes, temporal patterns of transcription are exquisitely controlled, allowing the acquisition and maintenance of the adipocyte phenotype. The genome is spatially organized; therefore decoding local features of the chromatin language alone does not suffice to understand how cell type-specific gene expression patterns are generated. Elucidating how nuclear architecture is built during the process of adipogenesis is thus an indispensable step to gain insight in how gene expression is regulated to achieve the adipocyte phenotype. Here we will summarize the recent advances in our understanding of the organization of nuclear architecture as progenitor cells differentiate in adipocytes, and the questions that still remained to be answered.
Collapse
Affiliation(s)
- Nancy L Charó
- a Laboratory of Nuclear Architecture, Instituto de Biología y Medicina Experimental (IByME) - CONICET , Buenos Aires , Argentina
| | - María I Rodríguez Ceschan
- a Laboratory of Nuclear Architecture, Instituto de Biología y Medicina Experimental (IByME) - CONICET , Buenos Aires , Argentina
| | - Natalia M Galigniana
- a Laboratory of Nuclear Architecture, Instituto de Biología y Medicina Experimental (IByME) - CONICET , Buenos Aires , Argentina
| | - Judith Toneatto
- a Laboratory of Nuclear Architecture, Instituto de Biología y Medicina Experimental (IByME) - CONICET , Buenos Aires , Argentina
| | - Graciela Piwien-Pilipuk
- a Laboratory of Nuclear Architecture, Instituto de Biología y Medicina Experimental (IByME) - CONICET , Buenos Aires , Argentina
| |
Collapse
|
40
|
Bian F, Wu YE, Zhang CL. Variation in the levels of IL-6 in pediatric patients with severe bacterial infectious diseases and correlation analysis between the levels of IL-6 and procalcitonin. Exp Ther Med 2017; 13:3484-3488. [PMID: 28587429 PMCID: PMC5450747 DOI: 10.3892/etm.2017.4395] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 04/03/2017] [Indexed: 11/23/2022] Open
Abstract
The objective of the present study was to investigate variations in the levels of interleukin (IL)-6, procalcitonin (PCT), and C-reactive protein (CRP) in children with severe bacterial infectious diseases and to analyze the correlation between the levels of IL-6 and PCT to determine the value of combined diagnosis with IL-6 and PCT. We analyzed 126 patients admitted to Xuzhou Children's Hospital for treatment, who were divided into severe bacterial infection (observation group, n=65) and non-bacterial infection groups (control group, n=61). The levels of IL-6, PCT, and CRP were measured and compared between the two groups. Data from both groups were statistically analyzed. The levels of IL-6, PCT, and CRT in the observation group were significantly higher than those in the control group (P<0.01); in the observation group, the levels of IL-6 and PCT on the 5th and 10th day after treatment were significantly lower than those before treatment (P<0.01); PCT showed better value for diagnosing severe bacterial infections compared with IL-6 and CRP; there was a positive correlation between the levels of IL-6 and PCT in the observation group; and the sensitivity and specificity of combined diagnosis with IL-6 and PCT for severe bacterial infection was 93.84% and 96.72%, respectively, which were significantly higher than those for diagnosis with only IL-6 (P<0.01). In conclusion, IL-6 combined with PCT can serve as an indicator with high sensitivity for detection of severe bacterial infections in children, which is of great significance for the differential diagnosis of severe bacterial infections in the early stage.
Collapse
Affiliation(s)
- Fangfang Bian
- Department of Respiration, Xuzhou Children's Hospital, Xuzhou, Jiangsu 221002, P.R. China
| | - Yue-E Wu
- Department of Respiration, Xuzhou Children's Hospital, Xuzhou, Jiangsu 221002, P.R. China
| | - Chong-Lin Zhang
- Department of Respiration, Xuzhou Children's Hospital, Xuzhou, Jiangsu 221002, P.R. China
| |
Collapse
|
41
|
Su H, Lei CT, Zhang C. Interleukin-6 Signaling Pathway and Its Role in Kidney Disease: An Update. Front Immunol 2017; 8:405. [PMID: 28484449 PMCID: PMC5399081 DOI: 10.3389/fimmu.2017.00405] [Citation(s) in RCA: 284] [Impact Index Per Article: 40.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Accepted: 03/22/2017] [Indexed: 12/19/2022] Open
Abstract
Interleukin-6 (IL-6) is a pleiotropic cytokine that not only regulates the immune and inflammatory response but also affects hematopoiesis, metabolism, and organ development. IL-6 can simultaneously elicit distinct or even contradictory physiopathological processes, which is likely discriminated by the cascades of signaling pathway, termed classic and trans-signaling. Besides playing several important physiological roles, dysregulated IL-6 has been demonstrated to underlie a number of autoimmune and inflammatory diseases, metabolic abnormalities, and malignancies. This review provides an overview of basic concept of IL-6 signaling pathway as well as the interplay between IL-6 and renal-resident cells, including podocytes, mesangial cells, endothelial cells, and tubular epithelial cells. Additionally, we summarize the roles of IL-6 in several renal diseases, such as IgA nephropathy, lupus nephritis, diabetic nephropathy, acute kidney injury, and chronic kidney disease.
Collapse
Affiliation(s)
- Hua Su
- Department of Nephrology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chun-Tao Lei
- Department of Nephrology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chun Zhang
- Department of Nephrology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
42
|
Takeuchi M, Mizuki N, Meguro A, Ombrello MJ, Kirino Y, Satorius C, Le J, Blake M, Erer B, Kawagoe T, Ustek D, Tugal-Tutkun I, Seyahi E, Ozyazgan Y, Sousa I, Davatchi F, Francisco V, Shahram F, Abdollahi BS, Nadji A, Shafiee NM, Ghaderibarmi F, Ohno S, Ueda A, Ishigatsubo Y, Gadina M, Oliveira SA, Gül A, Kastner DL, Remmers EF. Dense genotyping of immune-related loci implicates host responses to microbial exposure in Behçet's disease susceptibility. Nat Genet 2017; 49:438-443. [PMID: 28166214 PMCID: PMC5369770 DOI: 10.1038/ng.3786] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 01/12/2017] [Indexed: 12/14/2022]
Abstract
We analyzed 1,900 Turkish Behçet’s disease cases and 1,779 controls genotyped with the Immunochip. The most significantly associated single nucleotide polymorphism (SNP) was rs1050502, a tag SNP for HLA-B*51. In the Turkish discovery set, we identified three novel loci, IL1A-IL1B, IRF8, and CEBPB-PTPN1, with genome-wide significance (P<5×10−8) by direct genotyping, and ADO-EGR2 by imputation. ADO-EGR2, IRF8, and CEBPB-PTPN1 replicated by genotyping 969 Iranian cases and 826 controls. Imputed data in 608 Japanese cases and 737 controls replicated ADO-EGR2 and IRF8 and meta-analysis additionally identified RIPK2 and LACC1. The disease-associated allele of rs4402765, the lead marker of the IL1A-IL1B locus, was associated with both decreased interleukin-1α and increased interleukin-1β production. ABO non-secretor genotypes of two ancestry-specific FUT2 SNPs showed strong disease association (P=5.89×10−15). Our findings extend shared susceptibility genes with Crohn’s disease and leprosy, and implicate mucosal factors and the innate immune response to microbial exposure in Behçet’s disease susceptibility.
Collapse
Affiliation(s)
- Masaki Takeuchi
- Inflammatory Disease Section, National Human Genome Research Institute, US National Institutes of Health, Bethesda, Maryland, USA.,Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Nobuhisa Mizuki
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Akira Meguro
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Michael J Ombrello
- Translational Genetics and Genomics Unit, National Institute of Arthritis and Musculoskeletal and Skin Diseases, US National Institutes of Health, Bethesda, Maryland, USA
| | - Yohei Kirino
- Department of Stem Cell and Immune Regulation, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Colleen Satorius
- Inflammatory Disease Section, National Human Genome Research Institute, US National Institutes of Health, Bethesda, Maryland, USA
| | - Julie Le
- Inflammatory Disease Section, National Human Genome Research Institute, US National Institutes of Health, Bethesda, Maryland, USA
| | - Mary Blake
- Translational Immunology Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, US National Institutes of Health, Bethesda, Maryland, USA
| | - Burak Erer
- Inflammatory Disease Section, National Human Genome Research Institute, US National Institutes of Health, Bethesda, Maryland, USA
| | - Tatsukata Kawagoe
- Department of Ophthalmology and Visual Science, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Duran Ustek
- Department of Genetics, Institute for Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Ilknur Tugal-Tutkun
- Department of Ophthalmology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Emire Seyahi
- Department of Internal Medicine, Division of Rheumatology, Cerrahpasş a Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Yilmaz Ozyazgan
- Department of Ophthalmology, Cerrahpaşa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Inês Sousa
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal.,Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Fereydoun Davatchi
- Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Vânia Francisco
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal.,Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Farhad Shahram
- Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Abdolhadi Nadji
- Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Fahmida Ghaderibarmi
- Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Shigeaki Ohno
- Department of Ophthalmology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Atsuhisa Ueda
- Department of Stem Cell and Immune Regulation, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Yoshiaki Ishigatsubo
- Department of Stem Cell and Immune Regulation, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Massimo Gadina
- Translational Immunology Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, US National Institutes of Health, Bethesda, Maryland, USA
| | - Sofia A Oliveira
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal.,Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Ahmet Gül
- Department of Internal Medicine, Division of Rheumatology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Daniel L Kastner
- Inflammatory Disease Section, National Human Genome Research Institute, US National Institutes of Health, Bethesda, Maryland, USA
| | - Elaine F Remmers
- Inflammatory Disease Section, National Human Genome Research Institute, US National Institutes of Health, Bethesda, Maryland, USA
| |
Collapse
|
43
|
Okerblom JJ, Schwarz F, Olson J, Fletes W, Ali SR, Martin PT, Glass CK, Nizet V, Varki A. Loss of CMAH during Human Evolution Primed the Monocyte-Macrophage Lineage toward a More Inflammatory and Phagocytic State. THE JOURNAL OF IMMUNOLOGY 2017; 198:2366-2373. [PMID: 28148732 DOI: 10.4049/jimmunol.1601471] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 01/04/2017] [Indexed: 12/21/2022]
Abstract
Humans and chimpanzees are more sensitive to endotoxin than are mice or monkeys, but any underlying differences in inflammatory physiology have not been fully described or understood. We studied innate immune responses in Cmah-/- mice, emulating human loss of the gene encoding production of Neu5Gc, a major cell surface sialic acid. CMP-N-acetylneuraminic acid hydroxylase (CMAH) loss occurred ∼2-3 million years ago, after the common ancestor of humans and chimpanzees, perhaps contributing to speciation of the genus HomoCmah-/- mice manifested a decreased survival in endotoxemia following bacterial LPS injection. Macrophages from Cmah-/- mice secreted more inflammatory cytokines with LPS stimulation and showed more phagocytic activity. Macrophages and whole blood from Cmah-/- mice also killed bacteria more effectively. Metabolic reintroduction of Neu5Gc into Cmah-/- macrophages suppressed these differences. Cmah-/- mice also showed enhanced bacterial clearance during sublethal lung infection. Although monocytes and monocyte-derived macrophages from humans and chimpanzees exhibited marginal differences in LPS responses, human monocyte-derived macrophages killed Escherichia coli and ingested E. coli BioParticles better. Metabolic reintroduction of Neu5Gc into human macrophages suppressed these differences. Although multiple mechanisms are likely involved, one cause is altered expression of C/EBPβ, a transcription factor affecting macrophage function. Loss of Neu5Gc in Homo likely had complex effects on immunity, providing greater capabilities to clear sublethal bacterial challenges, possibly at the cost of endotoxic shock risk. This trade-off may have provided a selective advantage when Homo transitioned to butchery using stone tools. The findings may also explain why the Cmah-/- state alters severity in mouse models of human disease.
Collapse
Affiliation(s)
- Jonathan J Okerblom
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA 92093.,Department of Medicine, University of California, San Diego, La Jolla, CA 92093.,Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093
| | - Flavio Schwarz
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA 92093.,Department of Medicine, University of California, San Diego, La Jolla, CA 92093.,Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093
| | - Josh Olson
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093.,Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093
| | - William Fletes
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA 92093.,Initiative for Maximizing Student Development Program, University of California, San Diego, La Jolla, CA 92093
| | - Syed Raza Ali
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA 92093.,Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093.,Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093
| | - Paul T Martin
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH 42305.,Department of Physiology and Cell Biology, The Ohio State University College of Medicine, Columbus, OH 43210; and.,Center for Gene Therapy, The Research Institute at Nationwide Children's Hospital, Columbus, OH 43205
| | - Christopher K Glass
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA 92093.,Department of Medicine, University of California, San Diego, La Jolla, CA 92093.,Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093
| | - Victor Nizet
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA 92093.,Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093.,Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093
| | - Ajit Varki
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA 92093; .,Department of Medicine, University of California, San Diego, La Jolla, CA 92093.,Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093
| |
Collapse
|
44
|
Cirovic B, Schönheit J, Kowenz-Leutz E, Ivanovska J, Klement C, Pronina N, Bégay V, Leutz A. C/EBP-Induced Transdifferentiation Reveals Granulocyte-Macrophage Precursor-like Plasticity of B Cells. Stem Cell Reports 2017; 8:346-359. [PMID: 28111277 PMCID: PMC5312250 DOI: 10.1016/j.stemcr.2016.12.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 12/14/2016] [Accepted: 12/15/2016] [Indexed: 12/28/2022] Open
Abstract
The lymphoid-myeloid transdifferentiation potentials of members of the C/EBP family (C/EBPα, β, δ, and ε) were compared in v-Abl-immortalized primary B cells. Conversion of B cells to macrophages was readily induced by the ectopic expression of any C/EBP, and enhanced by endogenous C/EBPα and β activation. High transgene expression of C/EBPβ or C/EBPε, but not of C/EBPα or C/EBPδ, also induced the formation of granulocytes. Granulocytes and macrophages emerged in a mutually exclusive manner. C/EBPβ-expressing B cells produced granulocyte-macrophage progenitor (GMP)-like progenitors when subjected to selective pressure to eliminate lymphoid cells. The GMP-like progenitors remained self-renewing and cytokine-independent, and continuously produced macrophages and granulocytes. In addition to their suitability to study myelomonocytic lineage bifurcation, lineage-switched GMP-like progenitors could reflect the features of the lympho-myeloid lineage switch observed in leukemic progression. Transactivating C/EBP family members transdifferentiate B cells to myeloid cells C/EBPβ or C/EBPε transdifferentiate B cells to macrophages and granulocytes Transgene dosage determines granulocyte versus macrophage cell-type outcome C/EBP-mediated B cell conversion elicits GMP-like potential
Collapse
Affiliation(s)
- Branko Cirovic
- Department of Tumorigenesis and Cell Differentiation, Max-Delbrueck-Center for Molecular Medicine, Robert-Roessle-Straße10, 13125 Berlin, Germany; Humboldt-University of Berlin, Institute of Biology, 10115 Berlin, Germany
| | - Jörg Schönheit
- Department of Tumorigenesis and Cell Differentiation, Max-Delbrueck-Center for Molecular Medicine, Robert-Roessle-Straße10, 13125 Berlin, Germany
| | - Elisabeth Kowenz-Leutz
- Department of Tumorigenesis and Cell Differentiation, Max-Delbrueck-Center for Molecular Medicine, Robert-Roessle-Straße10, 13125 Berlin, Germany
| | - Jelena Ivanovska
- Department of Tumorigenesis and Cell Differentiation, Max-Delbrueck-Center for Molecular Medicine, Robert-Roessle-Straße10, 13125 Berlin, Germany
| | - Christine Klement
- Department of Tumorigenesis and Cell Differentiation, Max-Delbrueck-Center for Molecular Medicine, Robert-Roessle-Straße10, 13125 Berlin, Germany
| | - Nina Pronina
- Department of Tumorigenesis and Cell Differentiation, Max-Delbrueck-Center for Molecular Medicine, Robert-Roessle-Straße10, 13125 Berlin, Germany
| | - Valérie Bégay
- Department of Tumorigenesis and Cell Differentiation, Max-Delbrueck-Center for Molecular Medicine, Robert-Roessle-Straße10, 13125 Berlin, Germany
| | - Achim Leutz
- Department of Tumorigenesis and Cell Differentiation, Max-Delbrueck-Center for Molecular Medicine, Robert-Roessle-Straße10, 13125 Berlin, Germany; Humboldt-University of Berlin, Institute of Biology, 10115 Berlin, Germany.
| |
Collapse
|
45
|
Zinc Modulates Endotoxin-Induced Human Macrophage Inflammation through ZIP8 Induction and C/EBPβ Inhibition. PLoS One 2017; 12:e0169531. [PMID: 28056086 PMCID: PMC5215883 DOI: 10.1371/journal.pone.0169531] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 12/19/2016] [Indexed: 12/31/2022] Open
Abstract
Two vital functions of the innate immune system are to initiate inflammation and redistribute micronutrients in favor of the host. Zinc is an essential micronutrient used in host defense. The zinc importer ZIP8 is uniquely induced through stimulation of the NF-κB pathway by LPS in monocytes and functions to regulate inflammation in a zinc-dependent manner. Herein we determined the impact of zinc metabolism following LPS-induced inflammation in human macrophages. We observed that ZIP8 is constitutively expressed in resting macrophages and strikingly elevated following LPS exposure, a response that is unique compared to the 13 other known zinc import proteins. During LPS exposure, extracellular zinc concentrations within the physiological range markedly reduced IL-10 mRNA expression and protein release but increased mRNA expression of TNFα, IL-8, and IL-6. ZIP8 knockdown inhibited LPS-driven cellular accumulation of zinc and prevented zinc-dependent reduction of IL-10 release. Further, zinc supplementation reduced nuclear localization and activity of C/EBPβ, a transcription factor known to drive IL-10 expression. These studies demonstrate for the first time that zinc regulates LPS-mediated immune activation of human macrophages in a ZIP8-dependent manner, reducing IL-10. Based on these findings we predict that macrophage zinc metabolism is important in host defense against pathogens.
Collapse
|
46
|
Amin MB, Miura N, Uddin MKM, Islam MJ, Yoshida N, Iseki S, Kume T, Trainor PA, Saitsu H, Aoto K. Foxc2 CreERT2 knock-in mice mark stage-specific Foxc2-expressing cells during mouse organogenesis. Congenit Anom (Kyoto) 2017; 57:24-31. [PMID: 27783871 DOI: 10.1111/cga.12198] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 10/18/2016] [Accepted: 10/19/2016] [Indexed: 11/28/2022]
Abstract
Foxc2, a member of the winged helix transcription factor family, is essential for eye, calvarial bone, cardiovascular and kidney development in mice. Nevertheless, how Foxc2-expressing cells and their descendent cells contribute to the development of these tissues and organs has not been elucidated. Here, we generated a Foxc2 knock-in (Foxc2CreERT2 ) mouse, in which administration of estrogen receptor antagonist tamoxifen induces nuclear translocation of Cre recombinase in Foxc2-expressing cells. By crossing with ROSA-LacZ reporter mice (Foxc2CreERT2 ; R26R), the fate of Foxc2 positive (Foxc2+ ) cells was analyzed through LacZ staining at various embryonic stages. We found Foxc2+ cell descendants in the supraoccipital and exoccipital bone in E18.5 embryos, when tamoxifen was administered at embryonic day (E) 8.5. Furthermore, Foxc2+ descendant cranial neural crest cells at E8-10 were restricted to the corneal mesenchyme, while Foxc2+ cell derived cardiac neural crest cells at E6-12 were found in the aorta, pulmonary trunk and valves, and endocardial cushions. Foxc2+ cell descendant contributions to the glomerular podocytes in the kidney were also observed following E6.5 tamoxifen treatment. Our results are consistent with previous reports of Foxc2 expression during early embryogenesis and the Foxc2CreERT2 mouse provides a tool to investigate spatiotemporal roles of Foxc2 and contributions of Foxc2+ expressing cells during mouse embryogenesis.
Collapse
Affiliation(s)
- Mohammed Badrul Amin
- Department of Biochemistry, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Naoyuki Miura
- Department of Biochemistry, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | | | | | - Nobuaki Yoshida
- Laboratory of Developmental Genetics, Center for Experimental Medicine and Systems Biology, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Sachiko Iseki
- Section of Molecular Craniofacial Embryology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tsutomu Kume
- Erin Lambers, Feinberg Cardiovascular Research Institute, Department of Medicine, Northwestern University School of Medicine, Chicago, Illinois, USA
| | - Paul A Trainor
- Stowers Institute for Medical Research, Kansas City, Missouri, USA.,Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, Missouri, USA
| | - Hirotomo Saitsu
- Department of Biochemistry, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Kazushi Aoto
- Department of Biochemistry, Hamamatsu University School of Medicine, Hamamatsu, Japan
| |
Collapse
|
47
|
Lyroni K, Patsalos A, Daskalaki MG, Doxaki C, Soennichsen B, Helms M, Liapis I, Zacharioudaki V, Kampranis SC, Tsatsanis C. Epigenetic and Transcriptional Regulation of IRAK-M Expression in Macrophages. THE JOURNAL OF IMMUNOLOGY 2016; 198:1297-1307. [DOI: 10.4049/jimmunol.1600009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 11/21/2016] [Indexed: 12/16/2022]
|
48
|
Identification of an atypical monocyte and committed progenitor involved in fibrosis. Nature 2016; 541:96-101. [PMID: 28002407 DOI: 10.1038/nature20611] [Citation(s) in RCA: 211] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 11/07/2016] [Indexed: 12/29/2022]
Abstract
Monocytes and macrophages comprise a variety of subsets with diverse functions. It is thought that these cells play a crucial role in homeostasis of peripheral organs, key immunological processes and development of various diseases. Among these diseases, fibrosis is a life-threatening disease of unknown aetiology. Its pathogenesis is poorly understood, and there are few effective therapies. The development of fibrosis is associated with activation of monocytes and macrophages. However, the specific subtypes of monocytes and macrophages that are involved in fibrosis have not yet been identified. Here we show that Ceacam1+Msr1+Ly6C-F4/80-Mac1+ monocytes, which we term segregated-nucleus-containing atypical monocytes (SatM), share granulocyte characteristics, are regulated by CCAAT/enhancer binding protein β (C/EBPβ), and are critical for fibrosis. Cebpb deficiency results in a complete lack of SatM. Furthermore, the development of bleomycin-induced fibrosis, but not inflammation, was prevented in chimaeric mice with Cebpb-/- haematopoietic cells. Adoptive transfer of SatM into Cebpb-/- mice resulted in fibrosis. Notably, SatM are derived from Ly6C-FcεRI+ granulocyte/macrophage progenitors, and a newly identified SatM progenitor downstream of Ly6C-FcεRI+ granulocyte/macrophage progenitors, but not from macrophage/dendritic-cell progenitors. Our results show that SatM are critical for fibrosis and that C/EBPβ licenses differentiation of SatM from their committed progenitor.
Collapse
|
49
|
Hiyama A, Hiraishi S, Sakai D, Mochida J. CCAAT/enhancer binding protein β regulates the expression of tumor necrosis factor-α in the nucleus pulposus cells. J Orthop Res 2016; 34:865-75. [PMID: 26505752 DOI: 10.1002/jor.23085] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 10/20/2015] [Indexed: 02/04/2023]
Abstract
Tumor necrosis factor alpha (TNF-α) is important in the process of intervertebral disc (IVD) degeneration because of its ability to regulate other inflammatory mediators in autocrine and paracrine fashions. The mechanism responsible for the cell type-specific regulation of TNF-α is not well known. CCAAT/enhancer binding protein β (C/EBP β) is one of the transcriptional factors that is implicated in TNF-α expression. However, it is not known whether cross talk occurs between C/EBP β and the TNF-α pathway in IVD cells. The expression and effect of the C/EBP β mRNA and protein in rat IVD cells was assessed using real-time reverse transcription polymerase chain reaction, immunohistochemical, and immunofluorescence analyses. We present data that show that the C/EBP β mRNA and protein were expressed in rat and human IVDs in vivo. We also found that the expression of TNF-α is regulated by the transcription factor C/EBP β in rat NP cells. The TNF-α promoter was suppressed completely in the presence of the ERK inhibitor PD98059 and the p38 mitogen-activated protein kinase (MAPK) inhibitor SB202190, but not in the presence of the JNK inhibitor SP600125. In addition, gain and loss of function analyses showed that the expression of TNF-α was regulated by C/EBP β through the MAPK pathways. These findings showed that C/EBP β acts as a potent pro-inflammatory mediator by inducing the TNF-α gene at the transcription and protein levels via the ERK1/2 and p38 pathways in rat NP cells. Our findings may open a new avenue toward the understanding of the cellular and molecular mechanisms of IVD cells. © 2015 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 34:865-875, 2016.
Collapse
Affiliation(s)
- Akihiko Hiyama
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, 143 Shimokasuya, Isehara, 259-1193, Kanagawa, Japan.,Research Center for Regenerative Medicine, Tokai University School of Medicine, 143 Shimokasuya, Isehara, 259-1193, Kanagawa, Japan
| | - Shunsuke Hiraishi
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, 143 Shimokasuya, Isehara, 259-1193, Kanagawa, Japan.,Research Center for Regenerative Medicine, Tokai University School of Medicine, 143 Shimokasuya, Isehara, 259-1193, Kanagawa, Japan
| | - Daisuke Sakai
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, 143 Shimokasuya, Isehara, 259-1193, Kanagawa, Japan.,Research Center for Regenerative Medicine, Tokai University School of Medicine, 143 Shimokasuya, Isehara, 259-1193, Kanagawa, Japan
| | - Joji Mochida
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, 143 Shimokasuya, Isehara, 259-1193, Kanagawa, Japan.,Research Center for Regenerative Medicine, Tokai University School of Medicine, 143 Shimokasuya, Isehara, 259-1193, Kanagawa, Japan
| |
Collapse
|
50
|
Inhibition of IFN-γ-Induced Nitric Oxide Dependent Antimycobacterial Activity by miR-155 and C/EBPβ. Int J Mol Sci 2016; 17:535. [PMID: 27070591 PMCID: PMC4848991 DOI: 10.3390/ijms17040535] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 03/25/2016] [Accepted: 04/01/2016] [Indexed: 12/16/2022] Open
Abstract
miR-155 (microRNA-155) is an important non-coding RNA in regulating host crucial biological regulators. However, its regulatory function in mycobacterium infection remains unclear. Our study demonstrates that miR-155 expression is significantly increased in macrophages after Mycobacterium marinum (M.m) infection. Transfection with anti-miR-155 enhances nitric oxide (NO) synthesis and decreases the mycobacterium burden, and vice versa, in interferon γ (IFN-γ) activated macrophages. More importantly, miR-155 can directly bind to the 3'UTR of CCAAT/enhancer binding protein β (C/EBPβ), a positive transcriptional regulator of nitric oxide synthase (NOS2), and regulate C/EBPβ expression negatively. Knockdown of C/EBPβ inhibit the production of nitric oxide synthase and promoted mycobacterium survival. Collectively, these data suggest that M.m-induced upregulation of miR-155 downregulated the expression of C/EBPβ, thus decreasing the production of NO and promoting mycobacterium survival, which may provide an insight into the function of miRNA in subverting the host innate immune response by using mycobacterium for its own profit. Understanding how miRNAs partly regulate microbicidal mechanisms may represent an attractive way to control tuberculosis infectious.
Collapse
|