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Le T, Ferling I, Qiu L, Nabaile C, Assunção L, Roskelley CD, Grinstein S, Freeman SA. Redistribution of the glycocalyx exposes phagocytic determinants on apoptotic cells. Dev Cell 2024; 59:853-868.e7. [PMID: 38359833 DOI: 10.1016/j.devcel.2024.01.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 11/08/2023] [Accepted: 01/23/2024] [Indexed: 02/17/2024]
Abstract
Phagocytes remove dead and dying cells by engaging "eat-me" ligands such as phosphatidylserine (PtdSer) on the surface of apoptotic targets. However, PtdSer is obscured by the bulky exofacial glycocalyx, which also exposes ligands that activate "don't-eat-me" receptors such as Siglecs. Clearly, unshielding the juxtamembrane "eat-me" ligands is required for the successful engulfment of apoptotic cells, but the mechanisms underlying this process have not been described. Using human and murine cells, we find that apoptosis-induced retraction and weakening of the cytoskeleton that anchors transmembrane proteins cause an inhomogeneous redistribution of the glycocalyx: actin-depleted blebs emerge, lacking the glycocalyx, while the rest of the apoptotic cell body retains sufficient actin to tether the glycocalyx in place. Thus, apoptotic blebs can be engaged by phagocytes and are targeted for engulfment. Therefore, in cells with an elaborate glycocalyx, such as mucinous cancer cells, this "don't-come-close-to-me" barrier must be removed to enable clearance by phagocytosis.
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Affiliation(s)
- Trieu Le
- Program in Cell Biology, Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
| | - Iuliia Ferling
- Program in Cell Biology, Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
| | - Lanhui Qiu
- Program in Cell Biology, Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
| | - Clement Nabaile
- Department of Learning and Research in Biology, Ecole Normale Supérieure Paris-Saclay, Gif-sur-Yvette, France
| | - Leonardo Assunção
- Program in Cell Biology, Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
| | - Calvin D Roskelley
- Department of Cellular and Physiological Sciences, the Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Sergio Grinstein
- Program in Cell Biology, Hospital for Sick Children, Toronto, ON M5G 0A4, Canada; Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Spencer A Freeman
- Program in Cell Biology, Hospital for Sick Children, Toronto, ON M5G 0A4, Canada; Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada.
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2
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Zaid A, Ariel A. Harnessing anti-inflammatory pathways and macrophage nano delivery to treat inflammatory and fibrotic disorders. Adv Drug Deliv Rev 2024; 207:115204. [PMID: 38342241 DOI: 10.1016/j.addr.2024.115204] [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: 07/30/2023] [Revised: 12/08/2023] [Accepted: 02/05/2024] [Indexed: 02/13/2024]
Abstract
Targeting specific organs and cell types using nanotechnology and sophisticated delivery methods has been at the forefront of applicative biomedical sciences lately. Macrophages are an appealing target for immunomodulation by nanodelivery as they are heavily involved in various aspects of many diseases and are highly plastic in their nature. Their continuum of functional "polarization" states has been a research focus for many years yielding a profound understanding of various aspects of these cells. The ability of monocyte-derived macrophages to metamorphose from pro-inflammatory to reparative and consequently to pro-resolving effectors has raised significant interest in its therapeutic potential. Here, we briefly survey macrophages' ontogeny and various polarization phenotypes, highlighting their function in the inflammation-resolution shift. We review their inducing mediators, signaling pathways, and biological programs with emphasis on the nucleic acid sensing-IFN-I axis. We also portray the polarization spectrum of macrophages and the characteristics of their transition between different subtypes. Finally, we highlighted different current drug delivery methods for targeting macrophages with emphasis on nanotargeting that might lead to breakthroughs in the treatment of wound healing, bone regeneration, autoimmune, and fibrotic diseases.
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Affiliation(s)
- Ahmad Zaid
- Department of Biology and Human Biology, University of Haifa, Haifa, 3498838 Israel
| | - Amiram Ariel
- Department of Biology and Human Biology, University of Haifa, Haifa, 3498838 Israel.
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3
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Ferrer P, Upadhyay S, Cai JJ, Clement TM. Novel Nuclear Roles for Testis-Specific ACTL7A and ACTL7B Supported by In Vivo Characterizations and AI Facilitated In Silico Mechanistic Modeling with Implications for Epigenetic Regulation in Spermiogenesis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.29.582797. [PMID: 38464253 PMCID: PMC10925299 DOI: 10.1101/2024.02.29.582797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
A mechanistic role for nuclear function of testis-specific actin related proteins (ARPs) is proposed here through contributions of ARP subunit swapping in canonical chromatin regulatory complexes. This is significant to our understanding of both mechanisms controlling regulation of spermiogenesis, and the expanding functional roles of the ARPs in cell biology. Among these roles, actins and ARPs are pivotal not only in cytoskeletal regulation, but also in intranuclear chromatin organization, influencing gene regulation and nucleosome remodeling. This study focuses on two testis-specific ARPs, ACTL7A and ACTL7B, exploring their intranuclear activities and broader implications utilizing combined in vivo, in vitro, and in silico approaches. ACTL7A and ACTL7B, previously associated with structural roles, are hypothesized here to serve in chromatin regulation during germline development. This study confirms the intranuclear presence of ACTL7B in spermatocytes and round spermatids, revealing a potential role in intranuclear processes, and identifies a putative nuclear localization sequence conserved across mammalian ACTL7B, indicating a potentially unique mode of nuclear transport which differs from conventional actin. Ablation of ACTL7B leads to varied transcriptional changes reported here. Additionally, in the absence of ACTL7A or ACTL7B there is a loss of intranuclear localization of HDAC1 and HDAC3, which are known regulators of epigenetic associated acetylation changes that in turn regulate gene expression. Thus, these HDACs are implicated as contributors to the aberrant gene expression observed in the KO mouse testis transcriptomic analysis. Furthermore, this study employed and confirmed the accuracy of in silico models to predict ARP interactions with Helicase-SANT-associated (HSA) domains, uncovering putative roles for testis-specific ARPs in nucleosome remodeling complexes. In these models, ACTL7A and ACTL7B were found capable of binding to INO80 and SWI/SNF nucleosome remodeler family members in a manner akin to nuclear actin and ACTL6A. These models thus implicate germline-specific ARP subunit swapping within chromatin regulatory complexes as a potential regulatory mechanism for chromatin and associated molecular machinery adaptations in nuclear reorganizations required during spermiogenesis. These results hold implications for male fertility and epigenetic programing in the male-germline that warrant significant future investigation. In summary, this study reveals that ACTL7A and ACTL7B play intranuclear gene regulation roles in male gametogenesis, adding to the multifaceted roles identified also spanning structural, acrosomal, and flagellar stability. ACTL7A and ACTL7B unique nuclear transport, impact on HDAC nuclear associations, impact on transcriptional processes, and proposed mechanism for involvement in nucleosome remodeling complexes supported by AI facilitated in silico modeling contribute to a more comprehensive understanding of the indispensable functions of ARPs broadly in cell biology, and specifically in male fertility.
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Affiliation(s)
- Pierre Ferrer
- Interdisciplinary Faculty of Toxicology Program, Texas A&M University, College Station, TX 77843
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, TX 77843
| | - Srijana Upadhyay
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, TX 77843
| | - James J Cai
- Department of Veterinary Integrative Biosciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843
| | - Tracy M Clement
- Interdisciplinary Faculty of Toxicology Program, Texas A&M University, College Station, TX 77843
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, TX 77843
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4
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Xian L, Cheng S, Chen W, Zhong C, Hu Z, Deng X. Systematic analysis of MASP-1 serves as a novel immune-related biomarker in sepsis and trauma followed by preliminary experimental validation. Front Med (Lausanne) 2024; 11:1320811. [PMID: 38384415 PMCID: PMC10879275 DOI: 10.3389/fmed.2024.1320811] [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: 10/13/2023] [Accepted: 01/08/2024] [Indexed: 02/23/2024] Open
Abstract
Background Dysregulated immune response in trauma and sepsis leads to the abnormal activation of the complement and coagulation systems. Mannose-binding lectin (MBL)-associated serine protease-1 (MASP-1) activates the lectin pathway of the complement system and mediates proinflammatory and procoagulant reactions. However, the potential effects of MASP-1 in trauma and sepsis have not yet been explored. Methods We obtained five sepsis, two trauma, and one sepsis and trauma RNA-sequencing dataset from the Gene Expression Omnibus (GEO) database and conducted a comprehensive evaluation of the expression pattern, biological functions, and diagnostic value of MASP-1 in trauma and sepsis. Additionally, we investigated the association between MASP-1 expression and clinicopathological characteristics of trauma and sepsis. Furthermore, we collected clinical specimens to preliminarily validate the expression level and diagnostic efficacy of MASP-1 as well as the correlation of MASP-1 with clinical features of trauma and sepsis. Subsequently, we conducted a correlation analysis among MASP-1, immune cell infiltration, and immune and molecular pathways. Finally, we mechanistically analyzed the relationship among MASP-1, specific immune cells, and pivotal molecular pathways. Results MASP-1 expression was significantly upregulated in the trauma/sepsis samples compared to the control samples in the GEO datasets. MASP-1 exhibited excellent diagnostic values (AUC > 0.7) in multiple datasets and at multiple time points and could efficiently distinguish trauma/sepsis samples from the control samples. Moreover, MASP-1 expression was significantly positively correlated with the severity of the disease (APACHE-II, CRP, and neutrophil levels). These results were further validated by real-time quantitative polymerase chain reaction and enzyme-linked immunosorbent assay. Functional enrichment analysis revealed that MASP-1 primarily promotes trauma and sepsis via the immune-related signaling pathway. MASP-1 was significantly correlated with the infiltration of specific immune cells (such as B cells, CD8 T cells, neutrophils, macrophages, and infiltrating lymphocytes) and immune and molecular pathways (such as checkpoint, HLA, IL6/JAK/STAT3 signaling, necrosis, T-cell co-inhibition, and T-cell co-stimulation). Finally, analysis of the transcription and single-cell data revealed that MASP-1 was specifically expressed in T cells, and further correlation analysis revealed a close correlation between MASP-1 expression, proportion of CD8 T cells, and IL6/JAK/STAT3 signaling scores. Conclusion Our results suggest that MASP-1 can serve as an immune-related biomarker for the diagnosis and disease severity of trauma and sepsis. It may activate the IL6 JAK-STAT3 signaling pathway and promote CD8 T-cell depletion to trigger traumatic sepsis.
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Affiliation(s)
- Lina Xian
- Department of Intensive Care Unit, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China
| | - Shaowen Cheng
- Department of Wound Repair, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China
| | - Wei Chen
- Department of Intensive Care Unit, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China
| | - Changhui Zhong
- Department of Intensive Care Unit, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China
| | - Zhihua Hu
- Department of Intensive Care Unit, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China
| | - Xiaoyan Deng
- Department of Intensive Care Unit, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China
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5
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Zhang LY, Wang CY, Xu Q, Mu ZQ, Lin X, Li LY, Xiao Y, Wu M, Chen MK. Removal of epigenetic repressive mark on inflammatory genes in fat liver. J Gastroenterol Hepatol 2023; 38:1426-1437. [PMID: 37332142 DOI: 10.1111/jgh.16252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 04/28/2023] [Accepted: 05/18/2023] [Indexed: 06/20/2023]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease worldwide. The detailed epigenomic changes during fat accumulation in liver are not clear yet. Here, we performed ChIP-Seq analysis in the liver tissues of high-fat diet and regular chow diet mice and investigated the dynamic landscapes of H3K27ac and H3K9me3 marks on chromatin. We find that the activated typical enhancers marked with H3K27ac are enriched on lipid metabolic pathways in fat liver; however, super enhancers do not change much. The regions covered with H3K9me3 repressive mark seem to undergo great changes, and its peak number and intensity both decrease in fat liver. The enhancers located in lost H3K9me3 regions are enriched in lipid metabolism and inflammatory pathways; and motif analysis shows that they are potential targets for transcription factors involved in metabolic and inflammatory processes. Our study has revealed that H3K9me3 may play an important role during the pathogenesis of NAFLD through regulating the accessibility of enhancers.
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Affiliation(s)
- La-Ying Zhang
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei, China
| | - Chen-Yu Wang
- Frontier Science Center for Immunology and Metabolism, Hubei Key Laboratory of Cell Homeostasis, Hubei Key Laboratory of Developmentally Originated Disease, College of Life Sciences, Taikang Center for Life and Medical Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei, China
| | - Qun Xu
- Department of Rehabilitation Medicine, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei, China
| | - Zi-Qi Mu
- Frontier Science Center for Immunology and Metabolism, Hubei Key Laboratory of Cell Homeostasis, Hubei Key Laboratory of Developmentally Originated Disease, College of Life Sciences, Taikang Center for Life and Medical Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei, China
| | - Xiang Lin
- Frontier Science Center for Immunology and Metabolism, Hubei Key Laboratory of Cell Homeostasis, Hubei Key Laboratory of Developmentally Originated Disease, College of Life Sciences, Taikang Center for Life and Medical Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei, China
| | - Lian-Yun Li
- Frontier Science Center for Immunology and Metabolism, Hubei Key Laboratory of Cell Homeostasis, Hubei Key Laboratory of Developmentally Originated Disease, College of Life Sciences, Taikang Center for Life and Medical Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei, China
| | - Yong Xiao
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei, China
| | - Min Wu
- Frontier Science Center for Immunology and Metabolism, Hubei Key Laboratory of Cell Homeostasis, Hubei Key Laboratory of Developmentally Originated Disease, College of Life Sciences, Taikang Center for Life and Medical Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei, China
| | - Ming-Kai Chen
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, Hubei, China
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6
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Feng D, Xiang X, Guan Y, Guillot A, Lu H, Chang C, He Y, Wang H, Pan H, Ju C, Colgan SP, Tacke F, Wang XW, Kunos G, Gao B. Monocyte-derived macrophages orchestrate multiple cell-type interactions to repair necrotic liver lesions in disease models. J Clin Invest 2023; 133:e166954. [PMID: 37338984 PMCID: PMC10378165 DOI: 10.1172/jci166954] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 06/15/2023] [Indexed: 06/22/2023] Open
Abstract
The liver can fully regenerate after partial resection, and its underlying mechanisms have been extensively studied. The liver can also rapidly regenerate after injury, with most studies focusing on hepatocyte proliferation; however, how hepatic necrotic lesions during acute or chronic liver diseases are eliminated and repaired remains obscure. Here, we demonstrate that monocyte-derived macrophages (MoMFs) were rapidly recruited to and encapsulated necrotic areas during immune-mediated liver injury and that this feature was essential in repairing necrotic lesions. At the early stage of injury, infiltrating MoMFs activated the Jagged1/notch homolog protein 2 (JAG1/NOTCH2) axis to induce cell death-resistant SRY-box transcription factor 9+ (SOX9+) hepatocytes near the necrotic lesions, which acted as a barrier from further injury. Subsequently, necrotic environment (hypoxia and dead cells) induced a cluster of complement 1q-positive (C1q+) MoMFs that promoted necrotic removal and liver repair, while Pdgfb+ MoMFs activated hepatic stellate cells (HSCs) to express α-smooth muscle actin and induce a strong contraction signal (YAP, pMLC) to squeeze and finally eliminate the necrotic lesions. In conclusion, MoMFs play a key role in repairing the necrotic lesions, not only by removing necrotic tissues, but also by inducing cell death-resistant hepatocytes to form a perinecrotic capsule and by activating α-smooth muscle actin-expressing HSCs to facilitate necrotic lesion resolution.
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Affiliation(s)
- Dechun Feng
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Xiaogang Xiang
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Yukun Guan
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Adrien Guillot
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
- Department of Hepatology and Gastroenterology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Hongkun Lu
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Chingwen Chang
- Laboratory of Human Carcinogenesis and
- Liver Cancer Program, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - Yong He
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Hua Wang
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Hongna Pan
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Cynthia Ju
- Department of Anesthesiology, Critical Care and Pain Medicine, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Sean P. Colgan
- Department of Medicine, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Frank Tacke
- Department of Hepatology and Gastroenterology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Xin Wei Wang
- Laboratory of Human Carcinogenesis and
- Liver Cancer Program, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - George Kunos
- Laboratory of Physiologic Studies, NIAAA, NIH, Bethesda, Maryland, USA
| | - Bin Gao
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
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7
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Moon HG, Kim SJ, Kim KH, Kim YM, Rehman J, Lee H, Wu YC, Lee SSY, Christman JW, Ackerman SJ, Kim M, You S, Park GY. CX 3CR 1+ Macrophage Facilitates the Resolution of Allergic Lung Inflammation via Interacting CCL26. Am J Respir Crit Care Med 2023; 207:1451-1463. [PMID: 36790376 PMCID: PMC10263139 DOI: 10.1164/rccm.202209-1670oc] [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: 09/07/2022] [Accepted: 02/15/2023] [Indexed: 02/16/2023] Open
Abstract
Rationale: The resolution of inflammation is an active process coordinated by mediators and immune cells to restore tissue homeostasis. However, the mechanisms for resolving eosinophilic allergic lung inflammation triggered by inhaled allergens have not been fully elucidated. Objectives: Our objectives were to investigate the cellular mechanism of tissue-resident macrophages involved in the resolution process of eosinophilic lung inflammation. Methods: For the study, we used the institutional review board-approved protocol for human subsegmental bronchoprovocation with allergen, mouse models for allergic lung inflammation, and novel transgenic mice, including a conditional CCL26 knockout. The samples were analyzed using mass cytometry, single-cell RNA sequencing, and biophysical and immunological analyses. Measurements and Main Results: We compared alveolar macrophage (AM) subsets in the BAL before and after allergen provocation. In response to provocation with inhaled allergens, the subsets of AMs are dynamically changed in humans and mice. In the steady state, the AM subset expressing CX3CR1 is a relatively small fraction in bronchoalveolar space and lung tissue but drastically increases after allergen challenges. This subset presents unique patterns of gene expression compared with classical AMs, expressing high C1q family genes. CX3CR1+ macrophages are activated by airway epithelial cell-derived CCL26 via a receptor-ligand interaction. The binding of CCL26 to the CX3CR1+ receptor induces CX3CR1+ macrophages to secrete C1q, subsequently facilitating the clearance of eosinophils. Furthermore, the depletion of CX3CR1 macrophages or CCL26 in airway epithelial cells delays the resolution of allergic lung inflammation displaying prolonged tissue eosinophilia. Conclusions: These findings indicate that the CCL26-CX3CR1 pathway is pivotal in resolving eosinophilic allergic lung inflammation.
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Affiliation(s)
- Hyung-Geun Moon
- Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Medicine
| | - Seung-jae Kim
- Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Medicine
| | - Ki-Hyun Kim
- Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Medicine
| | | | | | - Hyun Lee
- Department of Medicinal Chemistry & Pharmacognosy, Center for Biomolecular Sciences
| | | | | | - John W. Christman
- Section of Pulmonary, Critical Care, and Sleep Medicine, Davis Heart and Lung Research Center, The Ohio State University, Columbus, Ohio
| | - Steven J. Ackerman
- Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago, Chicago, Illinois
| | - Minhyung Kim
- Departments of Surgery, Cedars-Sinai Medical Center, Los Angeles, California; and
| | - Sungyoung You
- Departments of Surgery, Cedars-Sinai Medical Center, Los Angeles, California; and
| | - Gye Young Park
- Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Medicine
- Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois
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8
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Bierschenk D, Papac-Milicevic N, Bresch IP, Kovacic V, Bettoni S, Dziedzic M, Wetsel RA, Eschenburg S, Binder CJ, Blom AM, King BC. C4b-binding protein inhibits particulate- and crystalline-induced NLRP3 inflammasome activation. Front Immunol 2023; 14:1149822. [PMID: 37283747 PMCID: PMC10239802 DOI: 10.3389/fimmu.2023.1149822] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 05/05/2023] [Indexed: 06/08/2023] Open
Abstract
Dysregulated NLRP3 inflammasome activation drives a wide variety of diseases, while endogenous inhibition of this pathway is poorly characterised. The serum protein C4b-binding protein (C4BP) is a well-established inhibitor of complement with emerging functions as an endogenously expressed inhibitor of the NLRP3 inflammasome signalling pathway. Here, we identified that C4BP purified from human plasma is an inhibitor of crystalline- (monosodium urate, MSU) and particulate-induced (silica) NLRP3 inflammasome activation. Using a C4BP mutant panel, we identified that C4BP bound these particles via specific protein domains located on the C4BP α-chain. Plasma-purified C4BP was internalised into MSU- or silica-stimulated human primary macrophages, and inhibited MSU- or silica-induced inflammasome complex assembly and IL-1β cytokine secretion. While internalised C4BP in MSU or silica-stimulated human macrophages was in close proximity to the inflammasome adaptor protein ASC, C4BP had no direct effect on ASC polymerisation in in vitro assays. C4BP was also protective against MSU- and silica-induced lysosomal membrane damage. We further provide evidence for an anti-inflammatory function for C4BP in vivo, as C4bp-/- mice showed an elevated pro-inflammatory state following intraperitoneal delivery of MSU. Therefore, internalised C4BP is an inhibitor of crystal- or particle-induced inflammasome responses in human primary macrophages, while murine C4BP protects against an enhanced inflammatory state in vivo. Our data suggests C4BP has important functions in retaining tissue homeostasis in both human and mice as an endogenous serum inhibitor of particulate-stimulated inflammasome activation.
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Affiliation(s)
- Damien Bierschenk
- Division of Medical Protein Chemistry, Department of Translational Medicine, Lund University, Malmö, Sweden
| | | | - Ian P. Bresch
- Institute for Biophysical Chemistry, Hannover Medical School, Hannover, Germany
- Cluster of Excellence RESIST (EXC 2155), Hannover Medical School, Hannover, Germany
| | - Valentina Kovacic
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Serena Bettoni
- Division of Medical Protein Chemistry, Department of Translational Medicine, Lund University, Malmö, Sweden
| | - Mateusz Dziedzic
- Division of Medical Protein Chemistry, Department of Translational Medicine, Lund University, Malmö, Sweden
| | - Rick A. Wetsel
- Research Center for Immunology and Autoimmune Diseases, Brown Foundation Institute of Molecular Medicine, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Susanne Eschenburg
- Institute for Biophysical Chemistry, Hannover Medical School, Hannover, Germany
- Cluster of Excellence RESIST (EXC 2155), Hannover Medical School, Hannover, Germany
| | - Christoph J. Binder
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Anna M. Blom
- Division of Medical Protein Chemistry, Department of Translational Medicine, Lund University, Malmö, Sweden
| | - Ben C. King
- Division of Medical Protein Chemistry, Department of Translational Medicine, Lund University, Malmö, Sweden
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9
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Ermis Akyuz E, Bell SM. The Diverse Role of CUB and Sushi Multiple Domains 1 (CSMD1) in Human Diseases. Genes (Basel) 2022; 13:genes13122332. [PMID: 36553598 PMCID: PMC9778380 DOI: 10.3390/genes13122332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/01/2022] [Accepted: 12/02/2022] [Indexed: 12/14/2022] Open
Abstract
CUB and Sushi Multiple Domains 1 (CSMD1), a tumour suppressor gene, encodes a large membrane-bound protein including a single transmembrane domain. This transmembrane region has a potential tyrosine phosphorylation site, suggesting that CSMD1 is involved in controlling cellular functions. Although the specific mechanisms of action for CSMD1 have not yet been uncovered, it has been linked to a number of processes including development, complement control, neurodevelopment, and cancer progression. In this review, we summarise CSMD1 functions in the cellular processes involved in the complement system, metastasis, and Epithelial mesenchymal transition (EMT) and also in the diseases schizophrenia, Parkinson's disease, and cancer. Clarifying the association between CSMD1 and the aforementioned diseases will contribute to the development of new diagnosis and treatment methods for these diseases. Recent studies in certain cancer types, e.g., gastric cancer, oesophageal cancer, and head and neck squamous cell carcinomas, have indicated the involvement of CSMD1 in response to immunotherapy.
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10
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Lichtnekert J, Anders HJ, Lech M. Lupus Nephritis: Current Perspectives and Moving Forward. J Inflamm Res 2022; 15:6533-6552. [PMID: 36483271 PMCID: PMC9726217 DOI: 10.2147/jir.s363722] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 11/22/2022] [Indexed: 08/07/2023] Open
Abstract
Lupus nephritis is a severe organ manifestation of systemic lupus erythematosus, and its pathogenesis involves complex etiology and mechanisms. Despite significant knowledge gains and extensive efforts put into understanding the development and relapsing disease activity, lupus nephritis remains a substantial cause of morbidity and mortality in lupus patients. Current therapies retain a significant unmet medical need regarding rates of complete response, preventing relapse of lupus nephritis, progression of chronic kidney disease to kidney failure, drug toxicity, and pill burden-related drug non-adherence. Connected to progression of chronic kidney disease are the associated risks for disabling or even lethal cardiovascular events, as well as chronic kidney disease-related secondary immunodeficiency and serious infections. In this regard, biomarkers are needed that can predict treatment response to specific drugs to enable personalized precision medicine. A series of clinical trials with innovative immunomodulatory drugs are ongoing and raise expectations for improvements in the management of lupus nephritis. Here, we review how new developments in pathogenesis connect with current and future perspectives for the management of lupus nephritis.
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Affiliation(s)
- Julia Lichtnekert
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, LMU München, München, Germany
| | - Hans-Joachim Anders
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, LMU München, München, Germany
| | - Maciej Lech
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, LMU München, München, Germany
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11
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Becker YLC, Duvvuri B, Fortin PR, Lood C, Boilard E. The role of mitochondria in rheumatic diseases. Nat Rev Rheumatol 2022; 18:621-640. [PMID: 36175664 DOI: 10.1038/s41584-022-00834-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/19/2022] [Indexed: 11/09/2022]
Abstract
The mitochondrion is an intracellular organelle thought to originate from endosymbiosis between an ancestral eukaryotic cell and an α-proteobacterium. Mitochondria are the powerhouses of the cell, and can control several important processes within the cell, such as cell death. Conversely, dysregulation of mitochondria possibly contributes to the pathophysiology of several autoimmune diseases. Defects in mitochondria can be caused by mutations in the mitochondrial genome or by chronic exposure to pro-inflammatory cytokines, including type I interferons. Following the release of intact mitochondria or mitochondrial components into the cytosol or the extracellular space, the bacteria-like molecular motifs of mitochondria can elicit pro-inflammatory responses by the innate immune system. Moreover, antibodies can target mitochondria in autoimmune diseases, suggesting an interplay between the adaptive immune system and mitochondria. In this Review, we discuss the roles of mitochondria in rheumatic diseases such as systemic lupus erythematosus, antiphospholipid syndrome and rheumatoid arthritis. An understanding of the different contributions of mitochondria to distinct rheumatic diseases or manifestations could permit the development of novel therapeutic strategies and the use of mitochondria-derived biomarkers to inform pathogenesis.
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Affiliation(s)
- Yann L C Becker
- Centre de Recherche ARThrite-Arthrite, Recherche et Traitements, Université Laval, Québec, QC, Canada
- Centre de Recherche du CHU de Québec-Université Laval, Axe Maladies infectieuses et immunitaires, Québec, QC, Canada
- Département de microbiologie et immunologie, Université Laval, Québec, QC, Canada
| | - Bhargavi Duvvuri
- Division of Rheumatology, University of Washington, Seattle, WA, USA
| | - Paul R Fortin
- Centre de Recherche ARThrite-Arthrite, Recherche et Traitements, Université Laval, Québec, QC, Canada
- Centre de Recherche du CHU de Québec-Université Laval, Axe Maladies infectieuses et immunitaires, Québec, QC, Canada
- Division of Rheumatology, Department of Medicine, CHU de Québec-Université Laval, Québec, QC, Canada
| | - Christian Lood
- Division of Rheumatology, University of Washington, Seattle, WA, USA.
| | - Eric Boilard
- Centre de Recherche ARThrite-Arthrite, Recherche et Traitements, Université Laval, Québec, QC, Canada.
- Centre de Recherche du CHU de Québec-Université Laval, Axe Maladies infectieuses et immunitaires, Québec, QC, Canada.
- Département de microbiologie et immunologie, Université Laval, Québec, QC, Canada.
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12
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The Impaired Mechanism and Facilitated Therapies of Efferocytosis in Atherosclerosis. J Cardiovasc Pharmacol 2022; 80:407-416. [PMID: 35853202 DOI: 10.1097/fjc.0000000000001311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 05/21/2022] [Indexed: 01/31/2023]
Abstract
ABSTRACT Cardiovascular disease is responsible for the largest number of deaths worldwide, and atherosclerosis is the primary cause. Apoptotic cell accumulation in atherosclerotic plaques leads to necrotic core formation and plaque rupture. Emerging findings show that the progression of atherosclerosis appears to suppress the elimination of apoptotic cells. Mechanistically, the reduced edibility of apoptotic cells, insufficient phagocytic capacity of phagocytes, downregulation of bridging molecules, and dysfunction in the polarization of macrophages lead to impaired efferocytosis in atherosclerotic plaques. This review focuses on the characteristics of efferocytosis in plaques and the therapeutic strategies aimed at promoting efferocytosis in atherosclerosis, which would provide novel insights for the development of antiatherosclerotic drugs based on efferocytosis.
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13
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Zhan M, Wen L, Zhu M, Gong J, Xi C, Wen H, Xu G, Shen H. Integrative Analysis of Transcriptome and Metabolome Reveals Molecular Responses in Eriocheir sinensis with Hepatopancreatic Necrosis Disease. BIOLOGY 2022; 11:1267. [PMID: 36138745 PMCID: PMC9495758 DOI: 10.3390/biology11091267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 08/21/2022] [Accepted: 08/22/2022] [Indexed: 06/16/2023]
Abstract
Hepatopancreatic necrosis disease (HPND) is a highly lethal disease that first emerged in 2015 in Jiangsu Province, China. So far, most researchers believe that this disease is caused by abiotic factors. However, its true pathogenic mechanism remains unknown. In this study, the effects of HPND on the metabolism and other biological indicators of the Chinese mitten crab (Eriocheir sinensis) were evaluated by integrating transcriptomics and metabolomics. Our findings demonstrate that the innate immunity, antioxidant activity, detoxification ability, and nervous system of the diseased crabs were affected. Additionally, metabolic pathways such as lipid metabolism, nucleotide metabolism, and protein metabolism were dysregulated, and energy production was slightly increased. Moreover, the IL-17 signaling pathway was activated and high levels of autophagy and apoptosis occurred in diseased crabs, which may be related to hepatopancreas damage. The abnormal mitochondrial function and possible anaerobic metabolism observed in our study suggested that functional hypoxia may be involved in HPND progression. Furthermore, the activities of carboxylesterase and acetylcholinesterase were significantly inhibited, indicating that the diseased crabs were likely stressed by pesticides such as pyrethroids. Collectively, our findings provide new insights into the molecular mechanisms altered in diseased crabs, as well as the etiology and pathogenic mechanisms of HPND.
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Affiliation(s)
- Ming Zhan
- Wuxi Fisheries College, Nanjing Agricultural University, Nanjing 210095, China
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
| | - Lujie Wen
- Wuxi Fisheries College, Nanjing Agricultural University, Nanjing 210095, China
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
| | - Mengru Zhu
- Wuxi Fisheries College, Nanjing Agricultural University, Nanjing 210095, China
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
| | - Jie Gong
- Wuxi Fisheries College, Nanjing Agricultural University, Nanjing 210095, China
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
| | - Changjun Xi
- Wuxi Fisheries College, Nanjing Agricultural University, Nanjing 210095, China
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
| | - Haibo Wen
- Wuxi Fisheries College, Nanjing Agricultural University, Nanjing 210095, China
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
| | - Gangchun Xu
- Wuxi Fisheries College, Nanjing Agricultural University, Nanjing 210095, China
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
| | - Huaishun Shen
- Wuxi Fisheries College, Nanjing Agricultural University, Nanjing 210095, China
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
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14
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A disturbed balance between blood complement protective factors (FH, ApoE) and common pathway effectors (C5a, TCC) in acute COVID-19 and during convalesce. Sci Rep 2022; 12:13658. [PMID: 35953544 PMCID: PMC9366819 DOI: 10.1038/s41598-022-17011-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 07/18/2022] [Indexed: 11/09/2022] Open
Abstract
A complement effect on homeostasis during infection is determined by both cytotoxic (activate complement component 5 (C5a) terminal cytotoxic complex (TCC)), and cytoprotective elements (complement factor H (FH), as well as apolipoprotein E (ApoE)). Here, we investigated the gap in knowledge in their blood milieu during SARS-CoV-2 infection with respect to the viral burden, level of tissue necrosis, and immunological response. 101 patients hospitalized with a PCR-confirmed diagnosis of COVID-19 had blood collected at H1 (48 h), H2 (3-4 Days), H3 (5-7 days), H4 (more than 7 days up to 93 days). Pre-existing conditions, treatment, the incidence of cerebrovascular events (CVA), a history of deep venous thrombosis (DVT) and pulmonary embolism (PE), and mortality was collected using electronic medical records. Plasma C5a, TCC, FH, and ApoE were considered as a complement milieu. Tissue necrosis (HMGB1, RAGE), non-specific inflammatory responses (IL-6, C-reactive protein), overall viral burden (SARS-CoV-2 spike protein), and specific immune responses (IgG, IgA, IgM directed αS- & N-proteins) were assessed simultaneously. C5a remained elevated across all time points, with the peak at 5-7 days. Studied elements of complement coalesced around three clusters: #0 (↑↑↑C5a, ↑↑TCC, ↓↓ApoE), #1 ↑C5a, ↑TCC, ↑↑↑FH); #2 (↑C5a, ↑TCC, ↑FH, ↑↑↑ApoE). The decline in FH and ApoE was a predictor of death, while TCC and C5a correlated with patient length of stay, APACHE, and CRP. Increased levels of C5a (Δ = 122.64; p = 0.0294; data not shown) and diminished levels of FH (Δ = 836,969; p = 0.0285; data not shown) co-existed with CVA incidence. C5a correlated storngly with blood RAGE and HMGB1, but not with viral load and immunological responsiveness. Remdesivir positively affected FH preservation, while convalescent plasma treatment elevated C5a levels. Three clusters of complement activation demonstrated a various milieu of ApoE & FH vs C5a & TCC in COVID-19 patients. Complement activation is linked to increased necrosis markers but not to viral burden or immune system response.
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15
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Intertwined pathways of complement activation command the pathogenesis of lupus nephritis. Transl Res 2022; 245:18-29. [PMID: 35296451 PMCID: PMC9167748 DOI: 10.1016/j.trsl.2022.03.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/07/2022] [Accepted: 03/08/2022] [Indexed: 12/26/2022]
Abstract
The complement system is involved in the origin of autoimmunity and systemic lupus erythematosus. Both genetic deficiency of complement components and excessive activation are involved in primary and secondary renal diseases, including lupus nephritis. Among the pathways, the classical pathway has long been accepted as the main pathway of complement activation in systemic lupus erythematosus. However, more recent studies have shown the contribution of factors B and D which implies the involvement of the alternative pathway. While there is evidence on the role of the lectin pathway in systemic lupus erythematosus, it is yet to be demonstrated whether this pathway is protective or harmful in lupus nephritis. Complement is being explored for the development of disease biomarkers and therapeutic targeting. In the current review we discuss the involvement of complement in lupus nephritis.
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16
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Hormone sensitive lipase ablation promotes bone regeneration. Biochim Biophys Acta Mol Basis Dis 2022; 1868:166449. [PMID: 35618183 DOI: 10.1016/j.bbadis.2022.166449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 04/08/2022] [Accepted: 05/13/2022] [Indexed: 02/07/2023]
Abstract
There is an inverse relationship between the differentiation of mesenchymal stem cells (MSCs) along either an adipocyte or osteoblast lineage, with lineage differentiation known to be mediated by transcription factors PPARγ and Runx2, respectively. Endogenous ligands for PPARγ are generated during the hydrolysis of triacylglycerols to fatty acids through the actions of lipases such as hormone sensitive lipase (HSL). To examine whether reduced production of endogenous PPARγ ligands would influence bone regeneration, we examined the effects of HSL knockout on fracture repair in mice using a tibial mono-cortical defect as a model. We found an improved rate of fracture repair in HSL-ko mice documented by serial μCT and bone histomorphometry compared to wild-type (WT) mice. Similarly, accelerated rates of bone regeneration were observed with a calvarial model where implantation of bone grafts from HSL-ko mice accelerated bone regeneration at the injury site. Further analysis revealed improved MSC differentiation down osteoblast and chondrocyte lineage with inhibition of HSL. MSC recruitment to the injury site was greater in HSL-ko mice than WT. Finally, we used single cell RNAseq to understand the osteoimmunological differences between WT and HSL-ko mice and found changes in the pre-osteoclast population. Our study shows HSL-ko mice as an interesting model to study improvements to bone injury repair. Furthermore, our study highlights the potential importance of pre-osteoclasts and osteoclasts in bone repair.
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Huang X, Luu LDW, Jia N, Zhu J, Fu J, Xiao F, Liu C, Li S, Shu G, Hou J, Kang M, Zhang D, Xu Y, Wang Y, Cui X, Lai J, Li J, Tai J. Multi-Platform Omics Analysis Reveals Molecular Signatures for Pathogenesis and Activity of Systemic Lupus Erythematosus. Front Immunol 2022; 13:833699. [PMID: 35514958 PMCID: PMC9063006 DOI: 10.3389/fimmu.2022.833699] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Accepted: 03/21/2022] [Indexed: 11/25/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is a complex autoimmune disease with heterogeneous clinical manifestations and the pathogenesis of SLE is still unclear. Various omics results have been reported for SLE, but the molecular hallmarks of SLE, especially in patients with different disease activity, using an integrated multi-omics approach have not been fully investigated. Here, we collected blood samples from 10 healthy controls (HCs) and 40 SLE patients with different clinical activity including inactive (IA), low activity (LA), and high activity (HA). Using an integrative analysis of proteomic, metabolomic and lipidomic profiles, we report the multi-omics landscape for SLE. The molecular changes suggest that both the complement system and the inflammatory response were activated in SLEs and were associated with disease activity. Additionally, activation of the immunoglobulin mediated immune response were observed in the LA stage of the disease, however this immune response was suppressed slightly in the HA stage. Finally, an imbalance in lipid metabolism, especially in sphingolipid metabolism, accompanied with dysregulated apolipoproteins were observed to contribute to the disease activity of SLE. The multi-omics data presented in this study and the characterization of peripheral blood from SLE patients may thus help provide important clues regarding the pathogenesis of SLE.
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Affiliation(s)
- Xiaolan Huang
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Laurence Don Wai Luu
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Nan Jia
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Jia Zhu
- Division of Paediatric Rheumatology, Children's Hospital Affiliated Capital Institute of Paediatrics, Beijing, China
| | - Jin Fu
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Fei Xiao
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Chunyan Liu
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Shengnan Li
- Division of Paediatric Rheumatology, Children's Hospital Affiliated Capital Institute of Paediatrics, Beijing, China
| | - Gaixiu Shu
- Division of Paediatric Rheumatology, Children's Hospital Affiliated Capital Institute of Paediatrics, Beijing, China
| | - Jun Hou
- Division of Paediatric Rheumatology, Children's Hospital Affiliated Capital Institute of Paediatrics, Beijing, China
| | - Min Kang
- Division of Paediatric Rheumatology, Children's Hospital Affiliated Capital Institute of Paediatrics, Beijing, China
| | - Dan Zhang
- Division of Paediatric Rheumatology, Children's Hospital Affiliated Capital Institute of Paediatrics, Beijing, China
| | - Yingjie Xu
- Division of Paediatric Rheumatology, Children's Hospital Affiliated Capital Institute of Paediatrics, Beijing, China
| | - Yi Wang
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Xiaodai Cui
- Experimental Research Center, Capital Institute of Pediatrics, Beijing, China
| | - Jianming Lai
- Division of Paediatric Rheumatology, Children's Hospital Affiliated Capital Institute of Paediatrics, Beijing, China
| | - Jieqiong Li
- Department of Respiratory Disease, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Jun Tai
- Department of Otolaryngology, Head and Neck Surgery, Children's Hospital Affiliated Capital Institute of Pediatrics, Beijing, China
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Yao Z, Zhang B, Niu G, Yan Z, Tong X, Zou Y, Yang M. Subunits of C1Q Are Associated With the Progression of Intermittent Claudication to Chronic Limb-Threatening Ischemia. Front Cardiovasc Med 2022; 9:864461. [PMID: 35433866 PMCID: PMC9010542 DOI: 10.3389/fcvm.2022.864461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 03/07/2022] [Indexed: 11/13/2022] Open
Abstract
Background The pathophysiological mechanisms of intermittent claudication (IC) progression to chronic limb-threatening ischemia (CLTI) are still vague and which of patients with IC will become CLTI are unknown. This study aimed to investigate the key molecules and pathways mediating IC progression to CLTI by a quantitative bioinformatic analysis of a public RNA-sequencing database of patients with peripheral artery disease (PAD) to screen biomarkers discriminating IC and CLTI. Methods The GSE120642 dataset was downloaded from the Gene Expression Omnibus (GEO) database. Differentially expressed genes (DEGs) between IC and CLTI tissues were analyzed using the “edgeR” packages of R. The Gene Ontology and the Kyoto Encyclopedia of Genes and Genomes enrichment analyses were performed to explore the functions of DEGs. Protein–protein interaction (PPI) networks were established by the Search Tool for the Retrieval of Interacting Genes (STRING) database and visualized by Cytoscape software. Hub genes were selected by plugin cytoHubba. Gene set enrichment analysis was performed and the receiver operating characteristic curves were used to evaluate the predictive values of hub genes. Results A total of 137 upregulated and 21 downregulated DEGs were identified. Functional enrichment clustering analysis revealed a significant association between DEGs and the complement and coagulation cascade pathways. The PPI network was constructed with 155 nodes and 105 interactions. The most significantly enriched pathway was complement activation. C1QB, C1QA, C1QC, C4A, and C1R were identified and validated as hub genes due to the high degree of connectivity. The area under the curve values for the five hub genes were greater than 0.95, indicating high accuracy for discriminating IC and CLTI. Conclusion The complement activation pathway is associated with IC progression to CLTI. C1QB, C1QA, C1QC, C4A, and C1R might serve as potential early biomarkers of CLTI.
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Chen X, Wang Y, Yu X, Wang S, Zhao M. Potential Involvement of Complement Activation in Kidney Vascular Lesions of Arterionephrosclerosis. Front Med (Lausanne) 2022; 9:836155. [PMID: 35433725 PMCID: PMC9008485 DOI: 10.3389/fmed.2022.836155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 03/08/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundComplement dysregulation has been implicated in the pathogenesis of malignant nephrosclerosis with typical pathological manifestation as thrombotic microangiopathy (TMA) in recent studies. The aim of the present study was to evaluate the potential role of complement activation in arterionephrosclerosis, the major pathological change in benign hypertensive nephrosclerosis.MethodsPatients with biopsy-proven arterionephrosclerosis from 2010 to 2018 in our center were retrospectively enrolled in the present study. The clinical data were retrieved from the medical chart record. The pathological changes of renal biopsy were semiquantitatively evaluated. The ratio of inner-/outer-luminal diameter of the arterioles was calculated to evaluate the degree of arteriosclerosis. Immunohistochemical staining of CD34 and CD68 was adopted to evaluate peritubular capillary (PTC) density and macrophage infiltration, respectively. Complement components, including C3d, C4d, C1q, and C5b-9, were detected by immunohistochemical staining in paraffin-embedded sections. IgM and albumin were detected by immunofluorescence staining in frozen renal tissues.ResultsFifty-two patients were enrolled. The mean age was 45.0 ± 12.7 years, with 39 (75%) males. The median duration of hypertension was 66 months (IQR: 24–138 months). A total of 950 arterioles were evaluated, with a mean ratio of the inner/outer luminal diameter of 0.43 ± 0.05. The ratio of the inner-/outer-luminal diameter correlated with eGFR (r = 0.341, p = 0.013), sclerotic/ischemic glomerular lesions (r = –0.364, p = 0.008) and PTC density (r = 0.426, p = 0.002). Seventy-four percent (703/950) of the evaluated arterioles had C3d deposition with various patterns and intensities. The percentage of C3d-positive arterioles ranged from 63.6 to 100.0% in each specimen. The ratio of the inner/outer luminal diameter of arterioles correlated with the intensity of C3d deposition (r = –0.174, p = 0.001). Infiltration of macrophages was observed around C3d-positive arterioles. The percentage of C3d-positive arterioles was correlated with macrophage infiltration in each specimen (r = 0.330, p = 0.018). Occasional C4d-positive staining on arterioles was observed with no deposition of C1q or C5b-9 in arterionephrosclerosis specimens.ConclusionOur findings provide evidence for potential complement activation in the pathogenesis of vascular lesions in arterionephrosclerosis.
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Affiliation(s)
- Xuejing Chen
- Renal Division, Department of Medicine, Peking University First Hospital, Institute of Nephrology, Peking University, Key Laboratory of Renal Disease, National Health and Family Planning Commission of the People’s Republic of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education, Beijing, China
| | - Yu Wang
- Renal Division, Department of Medicine, Peking University First Hospital, Institute of Nephrology, Peking University, Key Laboratory of Renal Disease, National Health and Family Planning Commission of the People’s Republic of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education, Beijing, China
- *Correspondence: Yu Wang,
| | - Xiaojuan Yu
- Renal Division, Department of Medicine, Peking University First Hospital, Institute of Nephrology, Peking University, Key Laboratory of Renal Disease, National Health and Family Planning Commission of the People’s Republic of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education, Beijing, China
| | - Suxia Wang
- Renal Division, Department of Medicine, Peking University First Hospital, Institute of Nephrology, Peking University, Key Laboratory of Renal Disease, National Health and Family Planning Commission of the People’s Republic of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education, Beijing, China
- Laboratory of Electron Microscopy, Pathological Centre, Peking University First Hospital, Beijing, China
| | - Minghui Zhao
- Renal Division, Department of Medicine, Peking University First Hospital, Institute of Nephrology, Peking University, Key Laboratory of Renal Disease, National Health and Family Planning Commission of the People’s Republic of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education, Beijing, China
- Peking-Tsinghua Center for Life Sciences, Beijing, China
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20
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Essen MF, Schlagwein N, den Hoven EM, Gijlswijk‐Janssen DJ, Lubbers R, den Bos RM, den Born J, Ruben JM, Trouw LA, Kooten C. Initial properdin binding contributes to alternative pathway activation at the surface of viable and necrotic cells. Eur J Immunol 2022; 52:597-608. [PMID: 35092629 PMCID: PMC9303752 DOI: 10.1002/eji.202149259] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 12/01/2021] [Accepted: 01/10/2022] [Indexed: 11/16/2022]
Abstract
Properdin, the only known positive regulator of the complement system, stabilizes the C3 convertase, thereby increasing its half‐life. In contrast to most other complement factors, properdin is mainly produced extrahepatically by myeloid cells. Recent data suggest a role for properdin as a pattern recognition molecule. Here, we confirmed previous findings of properdin binding to different necrotic cells including Jurkat T cells. Binding can occur independent of C3, as demonstrated by HAP‐1 C3 KO cells, excluding a role for endogenous C3. In view of the cellular source of properdin, interaction with myeloid cells was examined. Properdin bound to the surface of viable monocyte‐derived pro‐ and anti‐inflammatory macrophages, but not to DCs. Binding was demonstrated for purified properdin as well as fractionated P2, P3, and P4 properdin oligomers. Binding contributed to local complement activation as determined by C3 and C5b‐9 deposition on the cell surfaces and seems a prerequisite for alternative pathway activation. Interaction of properdin with cell surfaces could be inhibited with the tick protein Salp20 and by different polysaccharides, depending on sulfation and chain length. These data identify properdin as a factor interacting with different cell surfaces, being either dead or alive, contributing to the local stimulation of complement activation.
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Affiliation(s)
- Mieke F. Essen
- Div. of Nephrology and Transplant Medicine Dept. of Medicine Leiden University Medical Center Leiden The Netherlands
| | - Nicole Schlagwein
- Div. of Nephrology and Transplant Medicine Dept. of Medicine Leiden University Medical Center Leiden The Netherlands
| | - Elisa M.P. den Hoven
- Div. of Nephrology and Transplant Medicine Dept. of Medicine Leiden University Medical Center Leiden The Netherlands
| | - Daniëlle J. Gijlswijk‐Janssen
- Div. of Nephrology and Transplant Medicine Dept. of Medicine Leiden University Medical Center Leiden The Netherlands
| | - Rosalie Lubbers
- Department of Rheumatology Leiden University Medical Center Leiden The Netherlands
| | - Ramon M. den Bos
- Crystal and Structural Chemistry Bijvoet Center for Biomolecular Research Department of Chemistry Faculty of Science Utrecht University Utrecht The Netherlands
| | - Jacob den Born
- Department of Nephrology University Medical Center Groningen Groningen The Netherlands
| | - Jurjen M. Ruben
- Div. of Nephrology and Transplant Medicine Dept. of Medicine Leiden University Medical Center Leiden The Netherlands
| | - Leendert A. Trouw
- Department of Rheumatology Leiden University Medical Center Leiden The Netherlands
- Department of Immunology Leiden University Medical Center Leiden The Netherlands
| | - Cees Kooten
- Div. of Nephrology and Transplant Medicine Dept. of Medicine Leiden University Medical Center Leiden The Netherlands
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Huët MAL, Lee CZ, Rahman S. A review on association of fungi with the development and progression of carcinogenesis in the human body. CURRENT RESEARCH IN MICROBIAL SCIENCES 2021; 3:100090. [PMID: 34917994 PMCID: PMC8666644 DOI: 10.1016/j.crmicr.2021.100090] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 11/08/2021] [Accepted: 12/04/2021] [Indexed: 12/12/2022] Open
Abstract
The role and impact of commensal and pathogenic fungi in different parts of the human body are being increasingly appreciated, unveiling the importance of such microorganisms in human health. A key function is the involvement of the mycobiota in cross-kingdom interactions within the microbiome. Any disturbance in the functionality of the microbiota could alter metabolic reactions, have a negative impact on homeostasis or induce diseases. The association of fungi with cancer development is the focus of this review. Several studies have reported direct or indirect involvement of fungal pathogens and mycobiome dysbiosis in induction of carcinogenesis. Most studies focused on cancers of the gastrointestinal tract. However, researchers are now investigating other organs, such as the skin, where the significant results obtained confirm the involvement of fungal pathogens and administration of antifungal drugs in development of cancer. This review gives an overview of the different organs affected and describes the mechanisms used by these eukaryotes or antifungals to induce oncogenesis.
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Affiliation(s)
- Marie Andrea Laetitia Huët
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway,Subang Jaya, Selangor 47500, Malaysia
| | - Chuen Zhang Lee
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway,Subang Jaya, Selangor 47500, Malaysia
| | - Sadequr Rahman
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway,Subang Jaya, Selangor 47500, Malaysia.,Tropical Medicine and Biology Multidisciplinary Platform, Monash University Malaysia, Subang Jaya, Malaysia
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22
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Liu T, Yang M, Xia Y, Jiang C, Li C, Jiang Z, Wang X. Microarray-based analysis of renal complement components reveals a therapeutic target for lupus nephritis. Arthritis Res Ther 2021; 23:223. [PMID: 34433493 PMCID: PMC8385907 DOI: 10.1186/s13075-021-02605-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 08/11/2021] [Indexed: 12/14/2022] Open
Abstract
Background Screening abnormal pathways and complement components in the kidneys of patients with lupus nephritis (LN) and NZB/W mice may help to identify complement-related therapeutic targets for LN. Methods KEGG and GO enrichment assays were used to analyze kidney microarray data of LN patients and NZB/W mice. Immunohistochemistry and immunofluorescence assays were used to measure renal expression of complement-related proteins and TGFβ1. Cytokines were measured using RT-qPCR and ELISA. Results We screened the renal pathogenic pathways present in LN patients and NZB/W mice and selected the complement activation pathway for further study. The results indicated greater renal expression of C1qa, C1qb, C3, C3aR1, and C5aR1 at the mRNA and protein levels. C3 appeared to be a key factor in LN and the renal signaling downstream of C1 was inhibited. There were significant correlations between the expression of TGFβ1 and C3. Analysis of primary cell cultures indicated that TGFβ1 promoted the expression of C3 and that a TGFβ1 antagonist decreased the levels of C3 and C3aR. TGFβ1 inhibition significantly inhibited the deposition of complement-related factors in the kidneys of NZB/W mice. Conclusions At the onset of LN, there are significant increases in the renal levels of C3 and other complement pathway-related factors in patients with LN and NZB/W mice. C3 may lead to albuminuria and participate in the pathogenesis of LN. TGFβ1 promotes C3 synthesis, and TGFβ1 inhibition may block the progression of LN by inhibiting the synthesis of C3 and other complement components. Supplementary Information The online version contains supplementary material available at 10.1186/s13075-021-02605-9.
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Affiliation(s)
- Tao Liu
- Department of Rheumatology and Immunology, The First Hospital of Jilin University, Changchun, 130021, China
| | - Mingyue Yang
- Department of Translational Medicine, The First Hospital of Jilin University, Changchun, 130021, China
| | - Ying Xia
- Department of Translational Medicine, The First Hospital of Jilin University, Changchun, 130021, China
| | - Chuan Jiang
- Department of Translational Medicine, The First Hospital of Jilin University, Changchun, 130021, China
| | - Chenxu Li
- Department of Translational Medicine, The First Hospital of Jilin University, Changchun, 130021, China
| | - Zhenyu Jiang
- Department of Rheumatology and Immunology, The First Hospital of Jilin University, Changchun, 130021, China.
| | - Xiaosong Wang
- Department of Translational Medicine, The First Hospital of Jilin University, Changchun, 130021, China.
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23
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Inflammation and tumor progression: signaling pathways and targeted intervention. Signal Transduct Target Ther 2021; 6:263. [PMID: 34248142 PMCID: PMC8273155 DOI: 10.1038/s41392-021-00658-5] [Citation(s) in RCA: 743] [Impact Index Per Article: 247.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 05/11/2021] [Accepted: 05/23/2021] [Indexed: 02/06/2023] Open
Abstract
Cancer development and its response to therapy are regulated by inflammation, which either promotes or suppresses tumor progression, potentially displaying opposing effects on therapeutic outcomes. Chronic inflammation facilitates tumor progression and treatment resistance, whereas induction of acute inflammatory reactions often stimulates the maturation of dendritic cells (DCs) and antigen presentation, leading to anti-tumor immune responses. In addition, multiple signaling pathways, such as nuclear factor kappa B (NF-kB), Janus kinase/signal transducers and activators of transcription (JAK-STAT), toll-like receptor (TLR) pathways, cGAS/STING, and mitogen-activated protein kinase (MAPK); inflammatory factors, including cytokines (e.g., interleukin (IL), interferon (IFN), and tumor necrosis factor (TNF)-α), chemokines (e.g., C-C motif chemokine ligands (CCLs) and C-X-C motif chemokine ligands (CXCLs)), growth factors (e.g., vascular endothelial growth factor (VEGF), transforming growth factor (TGF)-β), and inflammasome; as well as inflammatory metabolites including prostaglandins, leukotrienes, thromboxane, and specialized proresolving mediators (SPM), have been identified as pivotal regulators of the initiation and resolution of inflammation. Nowadays, local irradiation, recombinant cytokines, neutralizing antibodies, small-molecule inhibitors, DC vaccines, oncolytic viruses, TLR agonists, and SPM have been developed to specifically modulate inflammation in cancer therapy, with some of these factors already undergoing clinical trials. Herein, we discuss the initiation and resolution of inflammation, the crosstalk between tumor development and inflammatory processes. We also highlight potential targets for harnessing inflammation in the treatment of cancer.
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24
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King BC, Blom AM. Complement in metabolic disease: metaflammation and a two-edged sword. Semin Immunopathol 2021; 43:829-841. [PMID: 34159399 PMCID: PMC8613079 DOI: 10.1007/s00281-021-00873-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 05/23/2021] [Indexed: 01/28/2023]
Abstract
We are currently experiencing an enduring global epidemic of obesity and diabetes. It is now understood that chronic low-grade tissue inflammation plays an important role in metabolic disease, brought upon by increased uptake of a so-called Western diet, and a more sedentary lifestyle. Many evolutionarily conserved links exist between metabolism and the immune system, and an imbalance in this system induced by chronic over-nutrition has been termed 'metaflammation'. The complement system is an important and evolutionarily ancient part of innate immunity, but recent work has revealed that complement not only is involved in the recognition of pathogens and induction of inflammation, but also plays important roles in cellular and tissue homeostasis. Complement can therefore contribute both positively and negatively to metabolic control, depending on the nature and anatomical site of its activity. This review will therefore focus on the interactions of complement with mechanisms and tissues relevant for metabolic control, obesity and diabetes.
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Affiliation(s)
- B C King
- Department of Translational Medicine, Lund University, Lund, Sweden.
| | - A M Blom
- Department of Translational Medicine, Lund University, Lund, Sweden
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25
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Local complement factor H protects kidney endothelial cell structure and function. Kidney Int 2021; 100:824-836. [PMID: 34139209 DOI: 10.1016/j.kint.2021.05.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 05/09/2021] [Accepted: 05/20/2021] [Indexed: 12/25/2022]
Abstract
Factor H (FH) is a critical regulator of the alternative complement pathway and its deficiency or mutation underlie kidney diseases such as dense deposit disease. Since vascular dysfunction is an important facet of kidney disease, maintaining optimal function of the lining endothelial cells is important for vascular health. To investigate the molecular mechanisms that are regulated by FH in endothelial cells, FH deficient and sufficient mouse kidney endothelial cell cultures were established. Endothelial FH deficiency resulted in cytoskeletal remodeling, increased angiogenic potential, loss of cellular layer integrity and increased cell proliferation. FH reconstitution prevented these FH-dependent proliferative changes. Respiratory flux analysis showed reduced basal mitochondrial respiration, ATP production and maximal respiratory capacity in FH deficient endothelial cells, while proton leak remained unaltered. Similar changes were observed in FH deficient human glomerular endothelial cells indicating the translational potential of these studies. Gene expression analysis revealed that the FH-dependent gene changes in mouse kidney endothelial cells include significant upregulation of genes involved in inflammation and the complement system. The transcription factor nuclear factor-kB, that regulates many biological processes, was translocated from the cytoplasm to the nucleus in the absence of FH. Thus, our studies show the functional relevance of intrinsic FH in kidney endothelial cells in man and mouse.
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26
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Guo S, Mao X, Li X, Ouyang H, Gao Y, Ming L. Serum Complement C1q Activity Is Associated With Obstructive Coronary Artery Disease. Front Cardiovasc Med 2021; 8:618173. [PMID: 33996933 PMCID: PMC8116493 DOI: 10.3389/fcvm.2021.618173] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 03/08/2021] [Indexed: 12/29/2022] Open
Abstract
Background: Complement C1q plays a dual role in the atherosclerosis. Previous studies showed inconsistent results about the association of serum C1q levels and coronary artery disease (CAD). Here, we explored the associations of serum C1q activity with CAD, coronary stenosis severity, cardiovascular biomarkers, and 1-year restenosis after coronary artery revascularization. Methods: We enrolled 956 CAD patients and 677 controls to evaluate the associations of serum complement C1q activity to the presence and severity of obstructive CAD and non-obstructive CAD. Serum C1q activity and the concentrations of laboratory markers were measured in all subjects. All the data were analyzed using SPSS22.0 software. Results: Serum C1q activity in Obstructive CAD and Non-Obstructive CAD groups was significantly higher than the control group (195.52 ± 48.31 kU/L and 195.42 ± 51.25 kU/L vs. 183.44 ± 31.75 kU/L, P < 0.05). Greater C1q activity was significantly correlated with higher total cholesterol (TC) and triglyceride (TG) levels. C1q activity was associated with an increased Odds Ratio (OR) of CAD (OR = 1.322, 95% CI 1.168–1.496, P < 0.05) and 1-year restenosis after revascularization (the highest OR = 3.544, 95% CI 1.089–12.702, P < 0.05). Complement C1q activity was not correlated with Gensini score in the Obstructive CAD group after adjustment for confounders. C1q activity has low value in predicting the incidence of CAD. Conclusion: Serum complement C1q activity is associated with obstructive CAD.
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Affiliation(s)
- Shuren Guo
- Department of Clinical Laboratory, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Xiaohuan Mao
- Department of Clinical Laboratory, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Xiaohua Li
- Department of Clinical Laboratory, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Huan Ouyang
- Department of Clinical Laboratory, ShenQiu People's Hospital, ShenQiu, Henan, China
| | - Yuhua Gao
- Department of Clinical Laboratory, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Liang Ming
- Department of Clinical Laboratory, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
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27
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More than a Pore: Nonlytic Antimicrobial Functions of Complement and Bacterial Strategies for Evasion. Microbiol Mol Biol Rev 2021; 85:85/1/e00177-20. [PMID: 33504655 DOI: 10.1128/mmbr.00177-20] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The complement system is an evolutionarily ancient defense mechanism against foreign substances. Consisting of three proteolytic activation pathways, complement converges on a common effector cascade terminating in the formation of a lytic pore on the target surface. The classical and lectin pathways are initiated by pattern recognition molecules binding to specific ligands, while the alternative pathway is constitutively active at low levels in circulation. Complement-mediated killing is essential for defense against many Gram-negative bacterial pathogens, and genetic deficiencies in complement can render individuals highly susceptible to infection, for example, invasive meningococcal disease. In contrast, Gram-positive bacteria are inherently resistant to the direct bactericidal activity of complement due to their thick layer of cell wall peptidoglycan. However, complement also serves diverse roles in immune defense against all bacteria by flagging them for opsonization and killing by professional phagocytes, synergizing with neutrophils, modulating inflammatory responses, regulating T cell development, and cross talk with coagulation cascades. In this review, we discuss newly appreciated roles for complement beyond direct membrane lysis, incorporate nonlytic roles of complement into immunological paradigms of host-pathogen interactions, and identify bacterial strategies for complement evasion.
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28
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Expanding the Role of Complement Therapies: The Case for Lupus Nephritis. J Clin Med 2021; 10:jcm10040626. [PMID: 33562189 PMCID: PMC7915321 DOI: 10.3390/jcm10040626] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/27/2021] [Accepted: 02/03/2021] [Indexed: 12/14/2022] Open
Abstract
The complement system is an innate immune surveillance network that provides defense against microorganisms and clearance of immune complexes and cellular debris and bridges innate and adaptive immunity. In the context of autoimmune disease, activation and dysregulation of complement can lead to uncontrolled inflammation and organ damage, especially to the kidney. Systemic lupus erythematosus (SLE) is characterized by loss of tolerance, autoantibody production, and immune complex deposition in tissues including the kidney, with inflammatory consequences. Effective clearance of immune complexes and cellular waste by early complement components protects against the development of lupus nephritis, while uncontrolled activation of complement, especially the alternative pathway, promotes kidney damage in SLE. Therefore, complement plays a dual role in the pathogenesis of lupus nephritis. Improved understanding of the contribution of the various complement pathways to the development of kidney disease in SLE has created an opportunity to target the complement system with novel therapies to improve outcomes in lupus nephritis. In this review, we explore the interactions between complement and the kidney in SLE and their implications for the treatment of lupus nephritis.
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29
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Morgan BP, Gommerman JL, Ramaglia V. An "Outside-In" and "Inside-Out" Consideration of Complement in the Multiple Sclerosis Brain: Lessons From Development and Neurodegenerative Diseases. Front Cell Neurosci 2021; 14:600656. [PMID: 33488361 PMCID: PMC7817777 DOI: 10.3389/fncel.2020.600656] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Accepted: 11/24/2020] [Indexed: 12/14/2022] Open
Abstract
The last 15 years have seen an explosion of new findings on the role of complement, a major arm of the immune system, in the central nervous system (CNS) compartment including contributions to cell migration, elimination of synapse during development, aberrant synapse pruning in neurologic disorders, damage to nerve cells in autoimmune diseases, and traumatic injury. Activation of the complement system in multiple sclerosis (MS) is typically thought to occur as part of a primary (auto)immune response from the periphery (the outside) against CNS antigens (the inside). However, evidence of local complement production from CNS-resident cells, intracellular complement functions, and the more recently discovered role of early complement components in shaping synaptic circuits in the absence of inflammation opens up the possibility that complement-related sequelae may start and finish within the brain itself. In this review, the complement system will be introduced, followed by evidence that implicates complement in shaping the developing, adult, and normal aging CNS as well as its contribution to pathology in neurodegenerative conditions. Discussion of data supporting "outside-in" vs. "inside-out" roles of complement in MS will be presented, concluded by thoughts on potential approaches to therapies targeting specific elements of the complement system.
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Affiliation(s)
- B. Paul Morgan
- UK Dementia Research Institute at Cardiff, Cardiff University, Cardiff, United Kingdom
| | | | - Valeria Ramaglia
- Department of Immunology, University of Toronto, Toronto, ON, Canada
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30
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Dernstedt A, Leidig J, Holm A, Kerkman PF, Mjösberg J, Ahlm C, Henriksson J, Hultdin M, Forsell MNE. Regulation of Decay Accelerating Factor Primes Human Germinal Center B Cells for Phagocytosis. Front Immunol 2021; 11:599647. [PMID: 33469456 PMCID: PMC7813799 DOI: 10.3389/fimmu.2020.599647] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 11/13/2020] [Indexed: 01/10/2023] Open
Abstract
Germinal centers (GC) are sites for extensive B cell proliferation and homeostasis is maintained by programmed cell death. The complement regulatory protein Decay Accelerating Factor (DAF) blocks complement deposition on host cells and therefore also phagocytosis of cells. Here, we show that B cells downregulate DAF upon BCR engagement and that T cell-dependent stimuli preferentially led to activation of DAFlo B cells. Consistent with this, a majority of light and dark zone GC B cells were DAFlo and susceptible to complement-dependent phagocytosis, as compared with DAFhi GC B cells. We could also show that the DAFhi GC B cell subset had increased expression of the plasma cell marker Blimp-1. DAF expression was also modulated during B cell hematopoiesis in the human bone marrow. Collectively, our results reveal a novel role of DAF to pre-prime activated human B cells for phagocytosis prior to apoptosis.
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Affiliation(s)
- Andy Dernstedt
- Department of Clinical Microbiology, Section of Infection and Immunology, Umeå University, Umeå, Sweden
| | - Jana Leidig
- Department of Clinical Microbiology, Section of Infection and Immunology, Umeå University, Umeå, Sweden
| | - Anna Holm
- Department of Clinical Sciences, Division of Otorhinolaryngology, Umeå University, Umeå, Sweden
| | - Priscilla F Kerkman
- Department of Clinical Microbiology, Section of Infection and Immunology, Umeå University, Umeå, Sweden
| | - Jenny Mjösberg
- Center for Infectious Medicine, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Clas Ahlm
- Department of Clinical Microbiology, Section of Infection and Immunology, Umeå University, Umeå, Sweden
| | - Johan Henriksson
- Molecular Infection Medicine Sweden, Department of Molecular Biology, Umeå University, Umeå, Sweden
| | - Magnus Hultdin
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
| | - Mattias N E Forsell
- Department of Clinical Microbiology, Section of Infection and Immunology, Umeå University, Umeå, Sweden
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31
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Abdouni Y, Ter Huurne GM, Yilmaz G, Monaco A, Redondo-Gómez C, Meijer EW, Palmans ARA, Becer CR. Self-Assembled Multi- and Single-Chain Glyconanoparticles and Their Lectin Recognition. Biomacromolecules 2020; 22:661-670. [PMID: 33373527 DOI: 10.1021/acs.biomac.0c01486] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In this work, we describe the physicochemical characterization of amphiphilic glycopolymers synthesized via copper(0)-mediated reversible-deactivation radical polymerization (Cu-RDRP). Depending on the chemical composition of the polymer, these glycopolymers are able to form multi-chain or single-chain polymeric nanoparticles. The folding of these polymers is first of all driven by the amphiphilicity of the glycopolymers and furthermore by the supramolecular formation of helical supramolecular stacks of benzene-1,3,5-tricarboxamides (BTAs) stabilized by threefold hydrogen bonding. The obtained polymeric nanoparticles were subsequently evaluated for their lectin-binding affinity toward a series of mannose- and galactose-binding lectins via surface plasmon resonance. We found that addition of 2-ethylhexyl acrylate to the polymer composition results in compact particles, which translates to a reduction in binding affinity, whereas with the addition of BTAs, the relation between the nature of the particle and the binding ability system becomes more unpredictable.
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Affiliation(s)
- Yamin Abdouni
- School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, U.K
| | - Gijs M Ter Huurne
- Institute for Complex Molecular Systems, Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600 MB, The Netherlands
| | - Gokhan Yilmaz
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, U.K.,Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
| | - Alessandra Monaco
- School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, U.K.,Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
| | - Carlos Redondo-Gómez
- School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, U.K
| | - E W Meijer
- Institute for Complex Molecular Systems, Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600 MB, The Netherlands
| | - Anja R A Palmans
- Institute for Complex Molecular Systems, Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600 MB, The Netherlands
| | - C Remzi Becer
- School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, U.K.,Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
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32
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Cheng X, He D, Liao C, Lin S, Tang L, Wang YL, Hu J, Li W, Liu Z, Wu Y, Liao Y. IL-1/IL-1R signaling induced by all-trans-retinal contributes to complement alternative pathway activation in retinal pigment epithelium. J Cell Physiol 2020; 236:3660-3674. [PMID: 33034385 DOI: 10.1002/jcp.30103] [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: 04/17/2020] [Revised: 09/27/2020] [Accepted: 09/29/2020] [Indexed: 12/23/2022]
Abstract
The underlying mechanisms of complement activation in Stargardt disease type 1 (STGD1) and age-related macular degeneration (AMD) are not fully understood. Overaccumulation of all-trans-retinal (atRAL) has been proposed as the pathogenic factor in both diseases. By incubating retinal pigment epithelium (RPE) cells with atRAL, we showed that C5b-9 membrane attack complexes (MACs) were generated mainly through complement alternative pathway. An increase in complement factor B (CFB) expression as well as downregulation of complement regulatory proteins CD46, CD55, CD59, and CFH were observed in RPE cells after atRAL treatment. Furthermore, interleukin-1β production was provoked in both atRAL-treated RPE cells and microglia/macrophages. Coincubation of RPE cells with interleukin-1 receptor antagonist (IL1Ra) and atRAL ameliorated complement activation and downregulated CFB expression by attenuating both p38 and c-Jun N-terminal kinase (JNK) signaling pathways. Our findings demonstrate that atRAL induces an autocrine/paracrine IL-1/IL-1R signaling to promote complement alternative pathway activation in RPE cells and provide a novel perspective on the pathomechanism of macular degeneration.
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Affiliation(s)
- Xinxuan Cheng
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, School of Medicine, Eye Institute of Xiamen University, Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiamen University Affiliated Xiamen Eye Center, Xiamen, China
| | - Danxue He
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, School of Medicine, Eye Institute of Xiamen University, Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiamen University Affiliated Xiamen Eye Center, Xiamen, China
| | - Chunyan Liao
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, School of Medicine, Eye Institute of Xiamen University, Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiamen University Affiliated Xiamen Eye Center, Xiamen, China
| | - Sijie Lin
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, School of Medicine, Eye Institute of Xiamen University, Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiamen University Affiliated Xiamen Eye Center, Xiamen, China
| | - Liying Tang
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, School of Medicine, Eye Institute of Xiamen University, Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiamen University Affiliated Xiamen Eye Center, Xiamen, China
| | - Yuan-Liang Wang
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou, China.,Section of Molecular Biology, University of California, San Diego, La Jolla, California, USA
| | - Jiaoyue Hu
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, School of Medicine, Eye Institute of Xiamen University, Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiamen University Affiliated Xiamen Eye Center, Xiamen, China
| | - Wei Li
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, School of Medicine, Eye Institute of Xiamen University, Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiamen University Affiliated Xiamen Eye Center, Xiamen, China
| | - Zuguo Liu
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, School of Medicine, Eye Institute of Xiamen University, Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiamen University Affiliated Xiamen Eye Center, Xiamen, China
| | - Yalin Wu
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, School of Medicine, Eye Institute of Xiamen University, Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiamen University Affiliated Xiamen Eye Center, Xiamen, China
| | - Yi Liao
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, School of Medicine, Eye Institute of Xiamen University, Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen, China.,Department of Ophthalmology, Xiamen University Affiliated Xiamen Eye Center, Xiamen, China
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33
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Kavvadas E. Autoantibodies specific for C1q, C3b, β2-glycoprotein 1 and annexins may amplify complement activity and reduce apoptosis-mediated immune suppression. Med Hypotheses 2020; 144:110286. [PMID: 33254588 DOI: 10.1016/j.mehy.2020.110286] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 08/13/2020] [Accepted: 09/14/2020] [Indexed: 02/08/2023]
Abstract
Neoplastic cells hijack cell death pathways to evade the immune response. Phosphatidylserine, a marker of apoptotic cells, and its highly conserved bridging proteins, annexins and β2-glycoprotein I, facilitate the efficient removal of apoptotic and necrotic cells via tumor-associated phagocytes in a process called efferocytosis. Efferocytosis results in the clearance of dead and dying cells and local immune suppression. Neoplastic cells also have an increased capacity to activate complement. Complement may facilitate the silent removal of tumor cells and has a dual role in promoting and inhibiting tumor growth. Here I hypothesize that immune response-generating IgG autoantibodies that recognize opsonizing fragments C1q, C3b, and phosphatidylserine-binding proteins (annexins, β2-glycoprotein I) may reduce tumor growth. I propose that these autoantibodies induce a pro-inflammatory, cytotoxic tumor microenvironment. Further, I predict that autoantibodies can drive neoplastic cell phagocytosis in an Fc receptor-dependent manner and recruit additional complement, resulting in immune-stimulatory effects. Excessive complement activation and antibody-dependent cytotoxicity may stimulate anti-tumor responses, including damage to tumor vasculature. Here I provide insights that may aid the development of more effective therapeutic modalities to control cancer. Such therapeutic approaches should kill neoplastic cells and target their interaction with host immune cells. Thereby the pro-tumorigenic effect of dead cancer cells could be limited while inducing the anti-tumor potential of tumor-associated phagocytes.
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Affiliation(s)
- Efstathios Kavvadas
- 417 General Military Hospital NIMTS - Pathology Department, Monis Petraki 12, Postal Code: 11521, Athens, Greece.
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34
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King BC, Kulak K, Colineau L, Blom AM. Outside in: Roles of complement in autophagy. Br J Pharmacol 2020; 178:2786-2801. [PMID: 32621514 DOI: 10.1111/bph.15192] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 06/17/2020] [Accepted: 06/24/2020] [Indexed: 12/12/2022] Open
Abstract
The complement system is a well-characterized cascade of extracellular serum proteins that is activated by pathogens and unwanted waste material. Products of activated complement signal to the host cells via cell surface receptors, eliciting responses such as removal of the stimulus by phagocytosis. The complement system therefore functions as a warning system, resulting in removal of unwanted material. This review describes how extracellular activation of the complement system can also trigger autophagic responses within cells, up-regulating protective homeostatic autophagy in response to perceived stress, but also initiating targeted anti-microbial autophagy in order to kill intracellular cytoinvasive pathogens. In particular, we will focus on recent discoveries that indicate that complement may also have roles in detection and autophagy-mediated disposal of unwanted materials within the intracellular environment. We therefore summarize the current evidence for complement involvement in autophagy, both by transducing signals across the cell membrane, as well as roles within the cellular environment. LINKED ARTICLES: This article is part of a themed issue on Canonical and non-canonical functions of the complement system in health and disease. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v178.14/issuetoc.
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Affiliation(s)
- Ben C King
- Section of Medical Protein Chemistry, Department of Translational Medicine, Lund University, Malmö, Sweden
| | - Klaudia Kulak
- Section of Medical Protein Chemistry, Department of Translational Medicine, Lund University, Malmö, Sweden
| | - Lucie Colineau
- Section of Medical Protein Chemistry, Department of Translational Medicine, Lund University, Malmö, Sweden
| | - Anna M Blom
- Section of Medical Protein Chemistry, Department of Translational Medicine, Lund University, Malmö, Sweden
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35
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Abdouni Y, Yilmaz G, Monaco A, Aksakal R, Becer CR. Effect of Arm Number and Length of Star-Shaped Glycopolymers on Binding to Dendritic and Langerhans Cell Lectins. Biomacromolecules 2020; 21:3756-3764. [DOI: 10.1021/acs.biomac.0c00856] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yamin Abdouni
- School of Engineering and Materials Science, Queen Mary University of London, London, E1 4NS, United Kingdom
| | - Gokhan Yilmaz
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Alessandra Monaco
- School of Engineering and Materials Science, Queen Mary University of London, London, E1 4NS, United Kingdom
| | - Resat Aksakal
- School of Engineering and Materials Science, Queen Mary University of London, London, E1 4NS, United Kingdom
| | - C. Remzi Becer
- School of Engineering and Materials Science, Queen Mary University of London, London, E1 4NS, United Kingdom
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
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36
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Kárpáti É, Papp A, Schneider AE, Hajnal D, Cserhalmi M, Csincsi ÁI, Uzonyi B, Józsi M. Interaction of the Factor H Family Proteins FHR-1 and FHR-5 With DNA and Dead Cells: Implications for the Regulation of Complement Activation and Opsonization. Front Immunol 2020; 11:1297. [PMID: 32765490 PMCID: PMC7378360 DOI: 10.3389/fimmu.2020.01297] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 05/22/2020] [Indexed: 12/14/2022] Open
Abstract
Complement plays an essential role in the opsonophagocytic clearance of apoptotic/necrotic cells. Dysregulation of this process may lead to inflammatory and autoimmune diseases. Factor H (FH), a major soluble complement inhibitor, binds to dead cells and inhibits excessive complement activation on their surface, preventing lysis, and the release of intracellular material, including DNA. The FH-related (FHR) proteins share common ligands with FH, due to their homology with this complement regulator, but they lack the domains that mediate the complement inhibitory activity of FH. Because their roles in complement regulation is controversial and incompletely understood, we studied the interaction of FHR-1 and FHR-5 with DNA and dead cells and investigated whether they influence the regulatory role of FH and the complement activation on DNA and dead cells. FH, FHR-1, and FHR-5 bound to both plasmid DNA and human genomic DNA, where both FHR proteins inhibited FH-DNA interaction. The FH cofactor activity was inhibited by FHR-1 and FHR-5 due to the reduced binding of FH to DNA in the presence of the FHRs. Both FHRs caused increased complement activation on DNA. FHR-1 and FHR-5 bound to late apoptotic and necrotic cells and recruited monomeric C-reactive protein and pentraxin 3, and vice versa. Interactions of the FHRs with pentraxins resulted in enhanced activation of both the classical and the alternative complement pathways on dead cells when exposed to human serum. Altogether, our results demonstrate that FHR-1 and FHR-5 are competitive inhibitors of FH on DNA; moreover, FHR-pentraxin interactions promote opsonization of dead cells.
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Affiliation(s)
- Éva Kárpáti
- Department of Immunology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Alexandra Papp
- Department of Immunology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Andrea E Schneider
- Department of Immunology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Dávid Hajnal
- Department of Immunology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Marcell Cserhalmi
- Department of Immunology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Ádám I Csincsi
- Department of Immunology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Barbara Uzonyi
- Department of Immunology, ELTE Eötvös Loránd University, Budapest, Hungary.,MTA-ELTE Complement Research Group, Department of Immunology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Mihály Józsi
- Department of Immunology, ELTE Eötvös Loránd University, Budapest, Hungary.,MTA-ELTE Complement Research Group, Department of Immunology, ELTE Eötvös Loránd University, Budapest, Hungary
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37
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Lebegge E, Arnouk SM, Bardet PMR, Kiss M, Raes G, Van Ginderachter JA. Innate Immune Defense Mechanisms by Myeloid Cells That Hamper Cancer Immunotherapy. Front Immunol 2020; 11:1395. [PMID: 32733461 PMCID: PMC7363805 DOI: 10.3389/fimmu.2020.01395] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 06/01/2020] [Indexed: 12/21/2022] Open
Abstract
Over the past decade, cancer immunotherapy has been steering immune responses toward cancer cell eradication. However, these immunotherapeutic approaches are hampered by the tumor-promoting nature of myeloid cells, including monocytes, macrophages, and neutrophils. Despite the arsenal of defense strategies against foreign invaders, myeloid cells succumb to the instructions of an established tumor. Interestingly, the most primordial defense responses employed by myeloid cells against pathogens, such as complement activation, antibody-dependent cell cytotoxicity and phagocytosis, actually seem to favor cancer progression. In this review, we discuss how rudimentary defense mechanisms deployed by myeloid cells can promote tumor progression.
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Affiliation(s)
- Els Lebegge
- Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Brussels, Belgium.,Myeloid Cell Immunology Laboratory, VIB Center for Inflammation Research, Brussels, Belgium
| | - Sana M Arnouk
- Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Brussels, Belgium.,Myeloid Cell Immunology Laboratory, VIB Center for Inflammation Research, Brussels, Belgium
| | - Pauline M R Bardet
- Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Brussels, Belgium.,Myeloid Cell Immunology Laboratory, VIB Center for Inflammation Research, Brussels, Belgium
| | - Máté Kiss
- Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Brussels, Belgium.,Myeloid Cell Immunology Laboratory, VIB Center for Inflammation Research, Brussels, Belgium
| | - Geert Raes
- Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Brussels, Belgium.,Myeloid Cell Immunology Laboratory, VIB Center for Inflammation Research, Brussels, Belgium
| | - Jo A Van Ginderachter
- Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Brussels, Belgium.,Myeloid Cell Immunology Laboratory, VIB Center for Inflammation Research, Brussels, Belgium
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38
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Wang Y, Nanda V, Direnzo D, Ye J, Xiao S, Kojima Y, Howe KL, Jarr KU, Flores AM, Tsantilas P, Tsao N, Rao A, Newman AAC, Eberhard AV, Priest JR, Ruusalepp A, Pasterkamp G, Maegdefessel L, Miller CL, Lind L, Koplev S, Björkegren JLM, Owens GK, Ingelsson E, Weissman IL, Leeper NJ. Clonally expanding smooth muscle cells promote atherosclerosis by escaping efferocytosis and activating the complement cascade. Proc Natl Acad Sci U S A 2020; 117:15818-15826. [PMID: 32541024 PMCID: PMC7354942 DOI: 10.1073/pnas.2006348117] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Atherosclerosis is the process underlying heart attack and stroke. Despite decades of research, its pathogenesis remains unclear. Dogma suggests that atherosclerotic plaques expand primarily via the accumulation of cholesterol and inflammatory cells. However, recent evidence suggests that a substantial portion of the plaque may arise from a subset of "dedifferentiated" vascular smooth muscle cells (SMCs) which proliferate in a clonal fashion. Herein we use multicolor lineage-tracing models to confirm that the mature SMC can give rise to a hyperproliferative cell which appears to promote inflammation via elaboration of complement-dependent anaphylatoxins. Despite being extensively opsonized with prophagocytic complement fragments, we find that this cell also escapes immune surveillance by neighboring macrophages, thereby exacerbating its relative survival advantage. Mechanistic studies indicate this phenomenon results from a generalized opsonin-sensing defect acquired by macrophages during polarization. This defect coincides with the noncanonical up-regulation of so-called don't eat me molecules on inflamed phagocytes, which reduces their capacity for programmed cell removal (PrCR). Knockdown or knockout of the key antiphagocytic molecule CD47 restores the ability of macrophages to sense and clear opsonized targets in vitro, allowing for potent and targeted suppression of clonal SMC expansion in the plaque in vivo. Because integrated clinical and genomic analyses indicate that similar pathways are active in humans with cardiovascular disease, these studies suggest that the clonally expanding SMC may represent a translational target for treating atherosclerosis.
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Affiliation(s)
- Ying Wang
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA 94305
| | - Vivek Nanda
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA 94305
- Department of Molecular and Cellular Pathology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Daniel Direnzo
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305
| | - Jianqin Ye
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305
| | - Sophia Xiao
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305
| | - Yoko Kojima
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305
| | - Kathryn L Howe
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305
| | - Kai-Uwe Jarr
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305
| | - Alyssa M Flores
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305
| | - Pavlos Tsantilas
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305
| | - Noah Tsao
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305
| | - Abhiram Rao
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA 94305
- Department of Bioengineering, Stanford University, Stanford, CA 94305
| | - Alexandra A C Newman
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA 22904
| | - Anne V Eberhard
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305
| | - James R Priest
- Division of Pediatric Cardiology, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305
| | - Arno Ruusalepp
- Department of Cardiac Surgery, Tartu University Hospital, Tartu, Estonia 50406
| | - Gerard Pasterkamp
- Department of Cardiology, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands
- Laboratory of Clinical Chemistry, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands
| | - Lars Maegdefessel
- Department for Vascular and Endovascular Surgery, Klinikum Rechts der Isar, Technical University Munich, 80333 Munich, Germany
- German Center for Cardiovascular Research (DZHK partner site), 10785 Munich, Germany
| | - Clint L Miller
- Center for Public Health Genomics, Department of Public Health Sciences, University of Virginia, Charlottesville, VA 22904
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22904
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA 22904
| | - Lars Lind
- Department of Medical Sciences, Uppsala University, SE-751 05 Uppsala, Sweden
| | - Simon Koplev
- Department of Genetics and Genomic Sciences, Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029-6574
| | - Johan L M Björkegren
- Department of Genetics and Genomic Sciences, Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029-6574
| | - Gary K Owens
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA 22904
| | - Erik Ingelsson
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA 94305
- Department of Medical Sciences, Uppsala University, SE-751 05 Uppsala, Sweden
- Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305
| | - Irving L Weissman
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305
| | - Nicholas J Leeper
- Division of Vascular Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305;
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA 94305
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Cedzyński M, Świerzko AS. Components of the Lectin Pathway of Complement in Haematologic Malignancies. Cancers (Basel) 2020; 12:E1792. [PMID: 32635486 PMCID: PMC7408476 DOI: 10.3390/cancers12071792] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/01/2020] [Accepted: 07/02/2020] [Indexed: 12/12/2022] Open
Abstract
The complement system is activated cascadically via three distinct major routes: classical pathway (CP), alternative pathway (AP) or lectin pathway (LP). The unique factors associated with the latter are collectins (mannose-binding lectin, collectin-10, collectin-11), ficolins (ficolin-1, ficolin-2, ficolin-3) and proteins of the mannose-binding lectin-associated serine protease (MASP) family (MASP-1, MASP-2, MASP-3, MAp19, MAp44). Collectins and ficolins are both pattern-recognising molecules (PRM), reactive against pathogen-associated molecular patterns (PAMP) or danger-associated molecular patterns (DAMP). The MASP family proteins were first discovered as complexes with mannose-binding lectin (MBL) and therefore named MBL-associated serine proteases, but later, they were found to interact with ficolins, and later still, collectin-10 and collectin-11. As well as proteolytic enzymes (MASP-1, MASP-2, MASP-3), the group includes non-enzymatic factors (MAp19, MAp44). In this review, the association-specific factors of the lectin pathway with haematologic malignancies and related infections are discussed.
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Affiliation(s)
- Maciej Cedzyński
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Lodowa 106, 92-232 Łódź, Poland;
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40
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Zheng QY, Liang SJ, Xu F, Yang Y, Feng JL, Shen F, Zhong Y, Wu S, Shu Y, Sun DD, Xu GL. Complement component 3 prevents imiquimod-induced psoriatic skin inflammation by inhibiting apoptosis in mice. Int Immunopharmacol 2020; 85:106692. [PMID: 32535539 DOI: 10.1016/j.intimp.2020.106692] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 06/03/2020] [Accepted: 06/08/2020] [Indexed: 12/13/2022]
Abstract
Complement component 3 (C3), a pivotal molecule in the complement system, is an essential immune mediator in various diseases, including psoriasis. However, the mechanistic role of C3 in psoriasis pathology and development remains elusive. Here, we showed that C3 deficiency dramatically augmented imiquimod-induced psoriasis-like skin inflammation, characterized by greater epidermal hyperplasia, inflammatory cell infiltration, and inflammatory gene expression than those in wild-type counterparts. In addition, C3 deficiency promoted imiquimod-induced skin cell apoptosis and supported greater proportions of IFN-γ+ T cells in the inflamed tissues. Accordingly, C3 supplement in the C3 deficient mice reduced skin inflammation and cells apoptosis. Moreover, blocking apoptosis with Z-VAD-FMK, a broad caspase inhibitor, markedly attenuated imiquimod-induced psoriasis-like skin inflammation and IFN-γ+ T cell responses in C3-deficient mice. Collectively, our results suggest that C3 prevents imiquimod-induced psoriasis-like skin inflammation by inhibiting apoptosis.
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Affiliation(s)
- Quan-You Zheng
- Department of Urology, the 958th Hospital, Southwest Hospital, Army Medical University, Chongqing 400038, China; Department of Immunology, Army Medical University, Chongqing 400038, China
| | - Shen-Ju Liang
- Department of Rheumatism and Immunology, Daping Hospital, Army Medical University, Chongqing 400042, China
| | - Feng Xu
- Department of Immunology, Army Medical University, Chongqing 400038, China
| | - Yi Yang
- Department of Rheumatism and Immunology, Daping Hospital, Army Medical University, Chongqing 400042, China
| | - Jian-Li Feng
- Department of Urology, the 958th Hospital, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Fen Shen
- Department of Urology, the 958th Hospital, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Yu Zhong
- Department of Urology, the 958th Hospital, Southwest Hospital, Army Medical University, Chongqing 400038, China; Department of Immunology, Army Medical University, Chongqing 400038, China
| | - Shun Wu
- Department of Immunology, Army Medical University, Chongqing 400038, China
| | - Yong Shu
- Department of Urology, the 958th Hospital, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Dao-Dong Sun
- Department of Urology, the 958th Hospital, Southwest Hospital, Army Medical University, Chongqing 400038, China.
| | - Gui-Lian Xu
- Department of Immunology, Army Medical University, Chongqing 400038, China.
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41
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Kawashima M, Juvet SC. The role of innate immunity in the long-term outcome of lung transplantation. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:412. [PMID: 32355856 PMCID: PMC7186608 DOI: 10.21037/atm.2020.03.20] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Long-term survival after lung transplantation remains suboptimal due to chronic lung allograft dysfunction (CLAD), a progressive scarring process affecting the graft. Although anti-donor alloimmunity is central to the pathogenesis of CLAD, its underlying mechanisms are not fully elucidated and it is neither preventable nor treatable using currently available immunosuppression. Recent evidence has shown that innate immune stimuli are fundamental to the development of CLAD. Here, we examine long-standing assumptions and new concepts linking innate immune activation to late lung allograft fibrosis.
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Affiliation(s)
- Mitsuaki Kawashima
- Latner Thoracic Research Laboratories, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Stephen C Juvet
- Latner Thoracic Research Laboratories, University Health Network, University of Toronto, Toronto, Ontario, Canada
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Kristensen MK, Hansen MB, Madsen MB, Hansen CB, Pilely K, Hyldegaard O, Garred P. Complement Activation Is Associated With Mortality in Patients With Necrotizing Soft-Tissue Infections-A Prospective Observational Study. Front Immunol 2020; 11:17. [PMID: 32082310 PMCID: PMC7006023 DOI: 10.3389/fimmu.2020.00017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 01/07/2020] [Indexed: 01/08/2023] Open
Abstract
Aim: We assessed whether different complement factors and complement activation products were associated with poor outcome in patients with necrotizing soft-tissue infection (NSTI). Methods: We conducted a prospective, observational study in an intensive care unit where treatment of NSTI is centralized at a national level. In 135 NSTI patients and 65 control patients, admission levels of MASP-1, MASP-2, MASP-3, C4, C3, complement activation products C4c, C3bc, and terminal complement complex (TCC) were assessed. Results: The 90-day mortality was 23%. In a Cox regression model adjusted for sex, and SAPS II, a higher than median MASP-1 (HR 0.378, CI 95% [0.164-0.872], p = 0.0226) and C4 (HR 0.162, 95% CI [0.060-0.438], p = 0.0003), C4c/C4 ratio (HR 2.290 95% CI [1.078-4.867], p = 0.0312), C3bc (HR 2.664 95% CI [1.195-5.938], p = 0.0166), and C3bc/C3 ratio (HR 4.041 95% CI [1.673-9.758], p = 0.0019) were associated with 90-day mortality, while MASP-2, C4c, C3, and TCC were not. C4 had the highest ROC-AUC (0.748, [95% CI 0.649-0.847]), which was comparable to the AUC for SOFA score (0.753, [95% CI 0.649-0.857]), and SAPS II (0.862 [95% CI 0.795-0.929]). Conclusion: In adjusted analyses, high admission levels of the C4c/C4 ratio, C3bc, and the C3bc/C3 ratio were significantly associated with a higher risk of death after 90 days while high admission levels of MASP-1 and C4 were associated with lower risk. In this cohort, these variables are better predictors of mortality in NSTI than C-reactive protein and Procalcitonin. C4's ability to predict mortality was comparable to the well-established scoring systems SAPS score II and SOFA on day 1.
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Affiliation(s)
- Markus Korsholm Kristensen
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Marco Bo Hansen
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark.,Department of Anesthesia, Center of Head and Orthopedics, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Martin Bruun Madsen
- Department of Intensive Care, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Cecilie Bo Hansen
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Katrine Pilely
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Ole Hyldegaard
- Department of Anesthesia, Center of Head and Orthopedics, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark.,Department of Intensive Care, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Peter Garred
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
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43
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Świerzko AS, Michalski M, Sokołowska A, Nowicki M, Szala-Poździej A, Eppa Ł, Mitrus I, Szmigielska-Kapłon A, Sobczyk-Kruszelnicka M, Michalak K, Gołos A, Wierzbowska A, Giebel S, Jamroziak K, Kowalski ML, Brzezińska O, Thiel S, Matsushita M, Jensenius JC, Gajek G, Cedzyński M. Associations of Ficolins With Hematological Malignancies in Patients Receiving High-Dose Chemotherapy and Autologous Hematopoietic Stem Cell Transplantations. Front Immunol 2020; 10:3097. [PMID: 32047495 PMCID: PMC6997528 DOI: 10.3389/fimmu.2019.03097] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 12/18/2019] [Indexed: 01/08/2023] Open
Abstract
A prospective study of 312 patients [194 with multiple myeloma (MM) and 118 with lymphomas (LYMPH)] receiving high-dose chemotherapy and autologous hematopoietic stem cell transplantation (auto-HSCT) was conducted. Ficolins are innate immune defense factors, able to distinguish between "self" "abnormal self," and "non-self" and contribute to the elimination of the last two by direct opsonization and/or initiation of complement activation via the lectin pathway. Concentrations of ficolin-1, ficolin-2, and ficolin-3 in serially taken serum samples were determined as were the polymorphisms of the corresponding (FCN1, FCN2, and FCN3) genes. Serum samples were collected before conditioning chemotherapy, before HSCT, and once weekly post-HSCT (four to five samples in total); some patients were also sampled at 1 and/or 3 months post-transplantation. The control group (C) consisted of 267 healthy unrelated individuals. Median ficolin-1 and ficolin-2 (but not ficolin-3) levels in MM patients' sera taken before chemotherapy were lower (and correspondingly frequencies of the lowest concentrations were higher) compared with controls. That appeared to be associated with the malignant disease itself rather than with post-HSCT complications (febrile neutropenia, infections accompanied, or not with bacteremia). Higher frequencies of the FCN1 genotype G/A-C/C-G/G (corresponding to polymorphisms at positions -542, -144, and +6658, respectively) and FCN2 gene heterozygosity for the -857 C>A polymorphism were found among patients diagnosed with MM compared with the C group. Furthermore, FCN2 G/G homozygosity (-557 A>G) was found more frequently and heterozygosity G/T at +6424 less frequently among LYMPH patients than among the healthy subjects. Heterozygosity for +1637delC mutation of the FCN3 gene was more common among patients diagnosed with lymphomas who experienced hospital infections. Although no evidence for an association of low ficolin-1 or ficolin-2 with infections during neutropenia following chemotherapy before HSCT was found, we observed a possible protective effect of ficolins during follow-up.
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Affiliation(s)
- Anna S. Świerzko
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Łódz, Poland
| | - Mateusz Michalski
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Łódz, Poland
| | - Anna Sokołowska
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Łódz, Poland
| | - Mateusz Nowicki
- Department of Hematology, Comprehensive Cancer Center and Traumatology, Copernicus Memorial Hospital, Łódz, Poland
| | - Agnieszka Szala-Poździej
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Łódz, Poland
| | - Łukasz Eppa
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Łódz, Poland
| | - Iwona Mitrus
- Department of Bone Marrow Transplantation and Oncohematology, Cancer Center and Institute of Oncology, Gliwice Branch, Gliwice, Poland
| | | | - Małgorzata Sobczyk-Kruszelnicka
- Department of Bone Marrow Transplantation and Oncohematology, Cancer Center and Institute of Oncology, Gliwice Branch, Gliwice, Poland
| | - Katarzyna Michalak
- Department of Bone Marrow Transplantation and Oncohematology, Cancer Center and Institute of Oncology, Gliwice Branch, Gliwice, Poland
| | - Aleksandra Gołos
- Department of Hematology, Institute of Hematology and Transfusion Medicine, Warsaw, Poland
| | | | - Sebastian Giebel
- Department of Bone Marrow Transplantation and Oncohematology, Cancer Center and Institute of Oncology, Gliwice Branch, Gliwice, Poland
| | - Krzysztof Jamroziak
- Department of Hematology, Institute of Hematology and Transfusion Medicine, Warsaw, Poland
| | - Marek L. Kowalski
- Department of Immunology and Allergy, Medical University of Łódz, Łódz, Poland
| | - Olga Brzezińska
- Department of Immunology and Allergy, Medical University of Łódz, Łódz, Poland
- Department of Rheumatology, Medical University of Łódz, Łódz, Poland
| | - Steffen Thiel
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Misao Matsushita
- Department of Applied Biochemistry, Tokai University, Hiratsuka, Japan
| | | | - Gabriela Gajek
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Łódz, Poland
| | - Maciej Cedzyński
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Łódz, Poland
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44
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Tenner AJ. Complement-Mediated Events in Alzheimer's Disease: Mechanisms and Potential Therapeutic Targets. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2020; 204:306-315. [PMID: 31907273 PMCID: PMC6951444 DOI: 10.4049/jimmunol.1901068] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 10/18/2019] [Indexed: 12/11/2022]
Abstract
An estimated 5.7 million Americans suffer from Alzheimer's disease in the United States, with no disease-modifying treatments to prevent or treat cognitive deficits associated with the disease. Genome-wide association studies suggest that an enhancement of clearance mechanisms and/or promotion of an anti-inflammatory response may slow or prevent disease progression. Increasing awareness of distinct roles of complement components in normal brain development and function and in neurodegenerative disorders align with complement-mediated responses, and thus, thorough understanding of these molecular pathways is needed to facilitate successful therapeutic design. Both beneficial and detrimental effects of C1q as well as contributions to local inflammation by C5a-C5aR1 signaling in brain highlight the need for precision of therapeutic design. The potential benefit of β-amyloid clearance from the circulation via CR1-mediated mechanisms is also reviewed. Therapies that suppress inflammation while preserving protective effects of complement could be tested now to slow the progression of this debilitating disease.
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Affiliation(s)
- Andrea J Tenner
- Department of Molecular Biology and Biochemistry, University of California Irvine, Irvine, CA 92697;
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, CA 92697;
- Department of Pathology and Laboratory Medicine, School of Medicine, University of California Irvine, Irvine, CA 92697; and
- Institute for Memory Impairment and Neurological Disorders, University of California Irvine, Irvine, CA 92697
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45
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Makou E, Bailey RG, Johnston H, Parkin JD, Hulme AN, Hähner G, Barlow PN. Combining SPR with atomic-force microscopy enables single-molecule insights into activation and suppression of the complement cascade. J Biol Chem 2019; 294:20148-20163. [PMID: 31719147 PMCID: PMC6937562 DOI: 10.1074/jbc.ra119.010913] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 11/07/2019] [Indexed: 12/05/2022] Open
Abstract
Activation and suppression of the complement system compete on every serum-exposed surface, host or foreign. Potentially harmful outcomes of this competition depend on surface molecules through mechanisms that remain incompletely understood. Combining surface plasmon resonance (SPR) with atomic force microscopy (AFM), here we studied two complement system proteins at the single-molecule level: C3b, the proteolytically activated form of C3, and factor H (FH), the surface-sensing C3b-binding complement regulator. We used SPR to monitor complement initiation occurring through a positive-feedback loop wherein surface-deposited C3b participates in convertases that cleave C3, thereby depositing more C3b. Over multiple cycles of flowing factor B, factor D, and C3 over the SPR chip, we amplified C3b from ∼20 to ∼220 molecules·μm−2. AFM revealed C3b clusters of up to 20 molecules and solitary C3b molecules deposited up to 200 nm away from the clusters. A force of 0.17 ± 0.02 nanonewtons was needed to pull a single FH molecule, anchored to the AFM probe, from its complex with surface-attached C3b. The extent to which FH molecules stretched before detachment varied widely among complexes. Performing force-distance measurements with FH(D1119G), a variant lacking one of the C3b-binding sites and causing atypical hemolytic uremic syndrome, we found that it detached more uniformly and easily. In further SPR experiments, KD values between FH and C3b on a custom-made chip surface were 5-fold tighter than on commercial chips and similar to those on erythrocytes. These results suggest that the chemistry at the surface on which FH acts drives conformational adjustments that are functionally critical.
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Affiliation(s)
- Elisavet Makou
- EaStChem School of Chemistry, University of Edinburgh, Joseph Black Chemistry Building, Edinburgh, Scotland EH9 3FJ, United Kingdom
| | - Richard G Bailey
- EaStChem School of Chemistry, University of St. Andrews, St Andrews, Scotland KY16 9ST, United Kingdom
| | - Heather Johnston
- EaStChem School of Chemistry, University of Edinburgh, Joseph Black Chemistry Building, Edinburgh, Scotland EH9 3FJ, United Kingdom
| | - John D Parkin
- EaStChem School of Chemistry, University of St. Andrews, St Andrews, Scotland KY16 9ST, United Kingdom
| | - Alison N Hulme
- EaStChem School of Chemistry, University of Edinburgh, Joseph Black Chemistry Building, Edinburgh, Scotland EH9 3FJ, United Kingdom
| | - Georg Hähner
- EaStChem School of Chemistry, University of St. Andrews, St Andrews, Scotland KY16 9ST, United Kingdom
| | - Paul N Barlow
- EaStChem School of Chemistry, University of Edinburgh, Joseph Black Chemistry Building, Edinburgh, Scotland EH9 3FJ, United Kingdom .,School of Biological Sciences, University of Edinburgh, Edinburgh, Scotland EH9 3JY, United Kingdom
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46
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Complement activation and regulation in rheumatic disease. Semin Immunol 2019; 45:101339. [DOI: 10.1016/j.smim.2019.101339] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 10/24/2019] [Accepted: 10/24/2019] [Indexed: 01/02/2023]
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47
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Saleh J, Al-Maqbali M, Abdel-Hadi D. Role of Complement and Complement-Related Adipokines in Regulation of Energy Metabolism and Fat Storage. Compr Physiol 2019; 9:1411-1429. [PMID: 31688967 DOI: 10.1002/cphy.c170037] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Adipose tissue releases many cytokines and inflammatory factors described as adipokines. In obesity, adipokines released from expanding adipose tissue are implicated in disease progression and metabolic dysfunction. However, mechanisms controlling the progression of adiposity and metabolic complications are not fully understood. It has been suggested that expanding fat mass and sustained release of inflammatory adipokines in adipose tissue lead to hypoxia, oxidative stress, apoptosis, and cellular damage. These changes trigger an immune response involving infiltration of adipose tissue with immune cells, complement activation and generation of factors involved in opsonization and clearance of damaged cells. Abundant evidence now indicates that adipose tissue is an active secretory source of complement and complement-related adipokines that, in addition to their inflammatory role, contribute to the regulation of metabolic function. This article highlights advances in knowledge regarding the role of these adipokines in energy regulation of adipose tissue through modulating lipogenic and lipolytic pathways. Several adipokines will be discussed including adipsin, Factor H, properdin, C3a, Acylation-Stimulating Protein, C1q/TNF-related proteins, and response gene to complement-32 (RGC-32). Interactions between these factors will be described considering their immune-metabolic roles in the adipose tissue microenvironment and their potential contribution to progression of adiposity and metabolic dysfunction. The differential expression and the role of complement factors in gender-related fat partitioning will also be addressed. Identifying lipogenic adipokines and their specific autocrine/paracrine roles may provide means for adipose-tissue-targeted therapeutic interventions that may disrupt the vicious circle of adiposity and disease progression. © 2019 American Physiological Society. Compr Physiol 9:1411-1429, 2019.
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Affiliation(s)
- Jumana Saleh
- Biochemistry Department, College of Medicine & Health Sciences, Sultan Qaboos University, Muscat, Oman
| | - Muna Al-Maqbali
- Biochemistry Department, College of Medicine, Sultan Qaboos University, Muscat, Oman
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48
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Yu W, Hao X, Yang F, Ma J, Zhao Y, Li Y, Wang J, Xu H, Chen L, Liu Q, Duan S, Yang Y, Huang F, He Z. Hematological and biochemical parameters for Chinese rhesus macaque. PLoS One 2019; 14:e0222338. [PMID: 31527891 PMCID: PMC6748566 DOI: 10.1371/journal.pone.0222338] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 08/27/2019] [Indexed: 12/27/2022] Open
Abstract
Rhesus macaque is an important animal model in biomedical research, especially human disease, developmental, translational, and pre-clinical research. Blood physiological and biochemical parameters are important markers for physiology, pathology, and toxicology research. However, these parameters have not been systematically reported for Chinese rhesus macaques. To characterize the reference for these parameters, this study collected 1805 Chinese rhesus macaques living in Southwestern China. A total of 24 blood physiological indexes and 27 biochemical parameters were determined. Sex and age were found to affect these parameters. In conclusion, a comprehensive and systematic reference of hematological and biochemical parameters for Chinese rhesus macaque was established in this work on the basis of a large cohort. Such reference will benefit biomedical research employing rhesus macaques as animal models.
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Affiliation(s)
- Wenhai Yu
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, PR China
| | - Xianhui Hao
- Medical Faculty, Kunming University of Science and Technology, Kunming, PR China
| | - Fengmei Yang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, PR China
| | - Jin Ma
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, PR China
| | - Yuan Zhao
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, PR China
| | - Yanyan Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, PR China
| | - Junbin Wang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, PR China
| | - Hongjie Xu
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, PR China
| | - Lixiong Chen
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, PR China
| | - Quan Liu
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, PR China
| | - Suqin Duan
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, PR China
| | - Yaping Yang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, PR China
| | - Fen Huang
- Medical Faculty, Kunming University of Science and Technology, Kunming, PR China
- * E-mail: (FH); (ZH)
| | - Zhanlong He
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, PR China
- * E-mail: (FH); (ZH)
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49
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Abstract
Tissue macrophages rapidly recognize and engulf apoptotic cells. These events require the display of so-called eat-me signals on the apoptotic cell surface, the most fundamental of which is phosphatidylserine (PtdSer). Externalization of this phospholipid is catalysed by scramblase enzymes, several of which are activated by caspase cleavage. PtdSer is detected both by macrophage receptors that bind to this phospholipid directly and by receptors that bind to a soluble bridging protein that is independently bound to PtdSer. Prominent among the latter receptors are the MER and AXL receptor tyrosine kinases. Eat-me signals also trigger macrophages to engulf virus-infected or metabolically traumatized, but still living, cells, and this 'murder by phagocytosis' may be a common phenomenon. Finally, the localized presentation of PtdSer and other eat-me signals on delimited cell surface domains may enable the phagocytic pruning of these 'locally dead' domains by macrophages, most notably by microglia of the central nervous system.
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Affiliation(s)
- Greg Lemke
- Molecular Neurobiology Laboratory, Immunobiology and Microbial Pathogenesis Laboratory, The Salk Institute for Biological Studies, La Jolla, CA, USA.
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50
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Abstract
The C-type lectins are a superfamily of proteins that recognize a broad repertoire of ligands and that regulate a diverse range of physiological functions. Most research attention has focused on the ability of C-type lectins to function in innate and adaptive antimicrobial immune responses, but these proteins are increasingly being recognized to have a major role in autoimmune diseases and to contribute to many other aspects of multicellular existence. Defects in these molecules lead to developmental and physiological abnormalities, as well as altered susceptibility to infectious and non-infectious diseases. In this Review, we present an overview of the roles of C-type lectins in immunity and homeostasis, with an emphasis on the most exciting recent discoveries.
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