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Hainline KM, Haddad HF, Gilpin A, Curvino EJ, Varghese S, Collier JH. Active immunotherapy for C5a-mediated inflammation using adjuvant-free self-assembled peptide nanofibers. Acta Biomater 2024; 179:83-94. [PMID: 38447809 PMCID: PMC11045302 DOI: 10.1016/j.actbio.2024.02.042] [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: 11/10/2023] [Revised: 02/01/2024] [Accepted: 02/27/2024] [Indexed: 03/08/2024]
Abstract
The terminal protein in the complement cascade C5a is a potent inflammatory molecule and chemoattractant that is involved in the pathology of multiple inflammatory diseases including sepsis and arthritis, making it a promising protein to target with immunotherapies. Active immunotherapies, in which patients are immunized against problematic self-molecules and generate therapeutic antibodies as a result, have received increasing interest as an alternative to traditional monoclonal antibody treatments. In previous work, we have designed supramolecular self-assembling peptide nanofibers as active immunotherapies with defined combinations of B- and T-cell epitopes. Herein, the self-assembling peptide Q11 platform was employed to generate a C5a-targeting active immunotherapy. Two of three predicted B-cell epitope peptides from C5a were found to be immunogenic when displayed within Q11 nanofibers, and the nanofibers were capable of reducing C5a serum concentrations following immunization. Contrastingly, C5a's precursor protein C5 maintained its original concentration, promising to minimize side effects heretofore associated with C5-targeted therapies. Immunization protected mice against an LPS-challenge model of sepsis, and it reduced clinical severity in a model of collagen-antibody induced arthritis. Together, this work indicates the potential for targeting terminal complement proteins with active immunotherapies by leveraging the immunogenicity of self-assembled peptide nanomaterials. STATEMENT OF SIGNIFICANCE: Chronic inflammatory diseases such as rheumatoid arthritis, psoriasis, and inflammatory bowel disease are currently treated primarily with monoclonal antibodies against key inflammatory mediators. While helpful for many patients, they have high non-response rates, are costly, and commonly fail as anti-drug antibodies are raised by the patient. The approach we describe here explores a fundamentally different treatment paradigm: raising therapeutic antibody responses with an active immunotherapy. We employ innovative supramolecular peptide nanomaterials to elicit neutralizing antibody responses against complement component C5a and demonstrate therapeutic efficacy in preclinical mouse models of sepsis and rheumatoid arthritis. The strategy reported may represent a potential alternative to monoclonal antibody therapies.
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Affiliation(s)
- Kelly M Hainline
- Duke University, Department of Biomedical Engineering, United States
| | | | - Anna Gilpin
- Duke University, Department of Biomedical Engineering, United States
| | | | - Shyni Varghese
- Duke University, Department of Biomedical Engineering, United States
| | - Joel H Collier
- Duke University, Department of Biomedical Engineering, United States.
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Brandolini L, d'Angelo M, Novelli R, Castelli V, Giorgio C, Sirico A, Cocchiaro P, D'Egidio F, Benedetti E, Cristiano C, Bugatti A, Ruocco A, Amendola PG, Talarico C, Manelfi C, Iaconis D, Beccari A, Quadros AU, Cunha TM, Caruso A, Russo R, Cimini A, Aramini A, Allegretti M. Paclitaxel binds and activates C5aR1: A new potential therapeutic target for the prevention of chemotherapy-induced peripheral neuropathy and hypersensitivity reactions. Cell Death Dis 2022; 13:500. [PMID: 35614037 PMCID: PMC9130998 DOI: 10.1038/s41419-022-04964-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 05/10/2022] [Accepted: 05/17/2022] [Indexed: 12/14/2022]
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) and hypersensitivity reactions (HSRs) are among the most frequent and impairing side effects of the antineoplastic agent paclitaxel. Here, we demonstrated that paclitaxel can bind and activate complement component 5a receptor 1 (C5aR1) and that this binding is crucial in the etiology of paclitaxel-induced CIPN and anaphylaxis. Starting from our previous data demonstrating the role of interleukin (IL)-8 in paclitaxel-induced neuronal toxicity, we searched for proteins that activate IL-8 expression and, by using the Exscalate platform for molecular docking simulations, we predicted the high affinity of C5aR1 with paclitaxel. By in vitro studies, we confirmed the specific and competitive nature of the C5aR1-paclitaxel binding and found that it triggers intracellularly the NFkB/P38 pathway and c-Fos. In F11 neuronal cells and rat dorsal root ganglia, C5aR1 inhibition protected from paclitaxel-induced neuropathological effects, while in paclitaxel-treated mice, the absence (knock-out mice) or the inhibition of C5aR1 significantly ameliorated CIPN symptoms-in terms of cold and mechanical allodynia-and reduced the chronic pathological state in the paw. Finally, we found that C5aR1 inhibition can counteract paclitaxel-induced anaphylactic cytokine release in macrophages in vitro, as well as the onset of HSRs in mice. Altogether these data identified C5aR1 as a key mediator and a new potential pharmacological target for the prevention and treatment of CIPN and HSRs induced by paclitaxel.
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Affiliation(s)
- Laura Brandolini
- Dompé Farmaceutici SpA, Via Campo di Pile, 67100, L'Aquila, Italy
| | - Michele d'Angelo
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100, L'Aquila, Italy
| | - Rubina Novelli
- Dompé Farmaceutici SpA, Via S. Lucia, 20122, Milan, Italy
| | - Vanessa Castelli
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100, L'Aquila, Italy
| | - Cristina Giorgio
- Dompé Farmaceutici SpA, Via Tommaso De Amicis, 80131, Naples, Italy
| | - Anna Sirico
- Dompé Farmaceutici SpA, Via Tommaso De Amicis, 80131, Naples, Italy
| | | | - Francesco D'Egidio
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100, L'Aquila, Italy
| | - Elisabetta Benedetti
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100, L'Aquila, Italy
| | - Claudia Cristiano
- Department of Pharmacy, University of Naples Federico II, 80131, Naples, Italy
| | - Antonella Bugatti
- Department of Molecular and Traslational Medicine, University of Brescia Medical School, 25123, Brescia, Italy
| | - Anna Ruocco
- Dompé Farmaceutici SpA, Via Tommaso De Amicis, 80131, Naples, Italy
| | | | - Carmine Talarico
- Dompé Farmaceutici SpA, Via Tommaso De Amicis, 80131, Naples, Italy
| | - Candida Manelfi
- Dompé Farmaceutici SpA, Via Tommaso De Amicis, 80131, Naples, Italy
| | - Daniela Iaconis
- Dompé Farmaceutici SpA, Via Tommaso De Amicis, 80131, Naples, Italy
| | - Andrea Beccari
- Dompé Farmaceutici SpA, Via Tommaso De Amicis, 80131, Naples, Italy
| | - Andreza U Quadros
- Center for Research in Inflammatory Diseases (CRID), Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirão Preto, SP, 14049-900, Brazil
| | - Thiago M Cunha
- Center for Research in Inflammatory Diseases (CRID), Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirão Preto, SP, 14049-900, Brazil
| | - Arnaldo Caruso
- Department of Molecular and Traslational Medicine, University of Brescia Medical School, 25123, Brescia, Italy
| | - Roberto Russo
- Department of Pharmacy, University of Naples Federico II, 80131, Naples, Italy
| | - Annamaria Cimini
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100, L'Aquila, Italy
- Sbarro Institute for Cancer Research and Molecular Medicine and Center for Biotechnology, Temple University, Philadelphia, PA, 19122, USA
| | - Andrea Aramini
- Dompé Farmaceutici SpA, Via Campo di Pile, 67100, L'Aquila, Italy
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Abstract
The recognition of microbial or danger-associated molecular patterns by complement proteins initiates a cascade of events that culminates in the activation of surface complement receptors on immune cells. Such signalling pathways converge with those activated downstream of pattern recognition receptors to determine the type and magnitude of the immune response. Intensive investigation in the field has uncovered novel pathways that link complement-mediated signalling with homeostatic and pathological T cell responses. More recently, the observation that complement proteins also act in the intracellular space to shape T cell fates has added a new layer of complexity. Here, we consider fundamental mechanisms and novel concepts at the interface of complement biology and immunity and discuss how these affect the maintenance of homeostasis and the development of human pathology.
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Li S, Qiu J, Qin L, Peng P, Li C, Mao J, Fang G, Chen Z, Lin S, Fu Y, Cai W, Ding Y. NOD2 negatively regulated titanium particle-induced osteolysis in mice. Biomater Sci 2019; 7:2702-2715. [PMID: 31065630 DOI: 10.1039/c9bm00306a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
For patients undergoing total joint replacement (TJR), one of the complications, aseptic loosening, could cause serious consequences, such as revision surgery. In early research, pattern recognition receptors (PRRs) were reported to play vital roles in recognizing wear particles from the prosthesis and initiating an inflammation response. In this research, we aimed to clarify the role of nucleotide-binding and oligomerization domain containing protein 2 (NOD2), one of the PRRs, in macrophage-induced aseptic loosening in vivo and in vitro. High expressions of NOD2 and TNFα were observed from twenty patients who underwent primary or revision total hip replacements (THR). The effect of NOD2 on the activation of inflammation pathways was observed in RAW264.7 cells and CRISPR-Cas9 NOD2-knockout mice. The expressions of NOD2, the NF-κB pathway, the MAPK pathway and proinflammatory cytokine TNF-α in macrophages stimulated by wear particles were up-regulated. Otherwise, inhibition of NOD2 further up-regulated the expressions of NOD2, the NF-κB pathway, the MAPK pathway and TNF-α. Knockdown of the NOD2 gene enhanced the cranial osteolysis induced by titanium particles in a mouse model. In conclusion, our study demonstrated that NOD2 plays a negative role in osteolysis induced by titanium particles in vitro and in vivo.
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Affiliation(s)
- Shixun Li
- Department of Orthopaedic Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China.
| | - Junxiong Qiu
- Department of Orthopaedic Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China.
| | - Ling Qin
- Musculoskeletal Research Laboratory Department of Orthopaedics & Taumatology and Innovative Orthopaedic Biomaterial and Drug Translational Research Laboratory of Li Ka Shing Institute of Health Sciences, the Chinese University of Hong Kong, SAR, PR China
| | - Peng Peng
- Department of Orthopaedic Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China.
| | - Changchuan Li
- Department of Orthopaedic Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China.
| | - Jiaji Mao
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China
| | - Guibin Fang
- Department of Orthopaedic Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China.
| | - Zhong Chen
- Department of Orthopaedic Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China.
| | - Sipeng Lin
- Department of Orthopaedic Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China.
| | - Yuan Fu
- Department of Orthopaedic Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China.
| | - Weibin Cai
- Guangdong Engineering & Technology Research Center for Disease-Model Animals, Laboratory Animal Center and Department of Biochemistry, Zhongshan Medical School, Sun Yat-Sen University, Guangzhou 510080, China.
| | - Yue Ding
- Department of Orthopaedic Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China.
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Banadakoppa M, Balakrishnan M, Yallampalli C. Upregulation and release of soluble fms-like tyrosine kinase receptor 1 mediated by complement activation in human syncytiotrophoblast cells. Am J Reprod Immunol 2018; 80:e13033. [PMID: 30099798 DOI: 10.1111/aji.13033] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 07/16/2018] [Indexed: 01/01/2023] Open
Abstract
PROBLEM Antiangiogenic molecule soluble fms-like tyrosine kinase receptor 1 (sFLT1) released from trophoblast cells is associated with pregnancy-specific hypertensive disorder pre-eclampsia. Cause of elevated sFLT1 in pre-eclampsia patients is not well understood. Despite evidence of excess systemic and placental complement activation in pre-eclampsia patients, its role in pathophysiology is not clear. If the complement activation plays a role in upregulation and secretion of sFLT1 is not known. METHOD OF STUDY Human trophoblast cells were isolated from term placentas and allowed to syncytialize. Complement was activated in vitro at sublethal levels on syncytiotrophoblast cells. Effect of complement activation on expression and release of sFLT1 was assessed by comparing its levels in these cells with and without complement activation. RESULTS Sublethal level of complement activation on syncytialized human trophoblast cells induced upregulation of sFLT1 mRNA and protein. Complement also induced secretion of sFLT1 in a manner depending on degree of activation. Anaphylatoxins C3a induced upregulation but not the release of sFLT1. Release of terminal membrane attack complex (MAC) was associated with sFLT1 secretion. CONCLUSION Complement activation plays a major role in both the expression and secretion of sFLT1 from syncytial trophoblast cells. The terminal MAC complex is involved in its secretion. Increased levels of sFLT1 in pre-eclampsia patients may be due to complement-induced upregulation and secretion.
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Affiliation(s)
- Manu Banadakoppa
- Basic Sciences Perinatology Research Laboratories, Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
| | - Meena Balakrishnan
- Basic Sciences Perinatology Research Laboratories, Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
| | - Chandra Yallampalli
- Basic Sciences Perinatology Research Laboratories, Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
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The Controversial C5a Receptor C5aR2: Its Role in Health and Disease. J Immunol Res 2017; 2017:8193932. [PMID: 28706957 PMCID: PMC5494583 DOI: 10.1155/2017/8193932] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 05/11/2017] [Indexed: 01/24/2023] Open
Abstract
After the discovery of the C5a receptor C5aR1, C5aR2 is the second receptor found to bind C5a and its des-arginine form. As a heptahelical G protein-coupled receptor but devoid of the intracellular Gα signal, C5aR2 is special and confusing. Ramifications and controversies about C5aR2 are under debate since its identification, from putative ligands and cellular localization to intracellular signals and pathological roles in inflammation and immunity. The ruleless and even conflicting pro- or anti-inflammatory role of C5aR2 in animal models of diverse diseases makes one bewildered. This review summarizes reports on C5aR2, tries to clear up available evidence on these four controversial aspects, and delineates C5aR2 function(s). It also summarizes available toolboxes for C5aR2 study.
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Qin CC, Liu YN, Hu Y, Yang Y, Chen Z. Macrophage inflammatory protein-2 as mediator of inflammation in acute liver injury. World J Gastroenterol 2017; 23:3043-3052. [PMID: 28533661 PMCID: PMC5423041 DOI: 10.3748/wjg.v23.i17.3043] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 01/11/2017] [Accepted: 02/08/2017] [Indexed: 02/06/2023] Open
Abstract
Macrophage inflammatory protein (MIP)-2 is one of the CXC chemokines and is also known as chemokine CXC ligand (CXCL2). MIP-2 affects neutrophil recruitment and activation through the p38 mitogen-activated-protein-kinase-dependent signaling pathway, by binding to its specific receptors, CXCR1 and CXCR2. MIP-2 is produced by a variety of cell types, such as macrophages, monocytes, epithelial cells, and hepatocytes, in response to infection or injury. In liver injury, activated Kupffer cells are known as the major source of MIP-2. MIP-2-recruited and activated neutrophils can accelerate liver inflammation by releasing various inflammatory mediators. Here, we give a brief introduction to the basic molecular and cellular sources of MIP-2, and focus on its physiological and pathological functions in acute liver injury induced by concanavalin A, lipopolysaccharides, irradiation, ischemia/reperfusion, alcohol, and hypoxia, and hepatectomy-induced liver regeneration and tumor colorectal metastasis. Further understanding of the regulatory mechanisms of MIP-2 secretion and activation may be helpful to develop MIP-2-targeted therapeutic strategies to prevent liver inflammation.
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Wong WY, Lee MML, Chan BD, Kam RKT, Zhang G, Lu AP, Tai WCS. Proteomic profiling of dextran sulfate sodium induced acute ulcerative colitis mice serum exosomes and their immunomodulatory impact on macrophages. Proteomics 2016; 16:1131-45. [DOI: 10.1002/pmic.201500174] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 12/01/2015] [Accepted: 01/21/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Wing-Yan Wong
- Department of Applied Biology & Chemical Technology; The Hong Kong Polytechnic University; Hung Hom Hong Kong S.A.R. China
| | - Magnolia Muk-Lan Lee
- Department of Applied Biology & Chemical Technology; The Hong Kong Polytechnic University; Hung Hom Hong Kong S.A.R. China
| | - Brandon Dow Chan
- Department of Applied Biology & Chemical Technology; The Hong Kong Polytechnic University; Hung Hom Hong Kong S.A.R. China
| | - Richard Kin-Tin Kam
- Department of Chemical Pathology, Faculty of Medicine; The Chinese University of Hong Kong; Hong Kong S.A.R. China
| | - Ge Zhang
- Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine; Hong Kong Baptist University; Kowloon Tong Hong Kong S.A.R. China
| | - Ai-Ping Lu
- Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine; Hong Kong Baptist University; Kowloon Tong Hong Kong S.A.R. China
- Centre for Cancer and Inflammation Research, School of Chinese Medicine; Hong Kong Baptist University; Kowloon Tong Hong Kong S.A.R. China
| | - William Chi-Shing Tai
- Department of Applied Biology & Chemical Technology; The Hong Kong Polytechnic University; Hung Hom Hong Kong S.A.R. China
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Riemann A, Wußling H, Loppnow H, Fu H, Reime S, Thews O. Acidosis differently modulates the inflammatory program in monocytes and macrophages. Biochim Biophys Acta Mol Basis Dis 2015; 1862:72-81. [PMID: 26499398 DOI: 10.1016/j.bbadis.2015.10.017] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 10/15/2015] [Accepted: 10/20/2015] [Indexed: 12/13/2022]
Abstract
Inflammation, ischemia or the microenvironment of solid tumors is often accompanied by a reduction of extracellular pH (acidosis) that stresses the cells and acts on cellular signaling and transcription. The effect of acidosis on the expression of various inflammatory markers, on functional parameters (migration, phagocytic activity) and on signaling pathways involved was studied in monocytic cells and macrophages. In monocytic cell lines acidosis led to a reduction in expression of most of the inflammatory mediators, namely IL-1ß, IL-6, TNF-α, MCP-1, COX-2 and osteopontin. In primary human monocytes MCP-1 and TNF-α were reduced but COX-2 and IL-6 were increased. In RAW264.7 macrophage cell line IL-1ß, COX-2 and iNOS expression was increased, whereas MCP-1 was reduced similar to the effect in monocytic cells. For primary human monocyte-derived macrophages the regulation of inflammatory markers by acidosis depended on activation state, except for the acidosis-induced downregulation of MCP-1 and TNF-α. Acidosis affected functional immune cell behavior when looking at phagocytic activity which was increased in a time-dependent manner, but cellular motility was not changed. Neither ERK1/2 nor CREB signaling was stimulated by the reduction of extracellular pH. However, p38 was activated by acidosis in RAW264.7 cells and this activation was critical for the induction of IL-1ß, COX-2 and iNOS expression. In conclusion, acidosis may impede the recruitment of immune cells, but fosters inflammation when macrophages are present by increasing the level of COX-2 and iNOS and by functionally forcing up the phagocytic activity.
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Affiliation(s)
- Anne Riemann
- Julius-Bernstein-Institute of Physiology, University Halle-Wittenberg, Germany.
| | - Hanna Wußling
- Julius-Bernstein-Institute of Physiology, University Halle-Wittenberg, Germany
| | - Harald Loppnow
- Dept. of Internal Medicine III, University Halle-Wittenberg, Germany
| | - Hang Fu
- Dept. of Internal Medicine III, University Halle-Wittenberg, Germany
| | - Sarah Reime
- Julius-Bernstein-Institute of Physiology, University Halle-Wittenberg, Germany
| | - Oliver Thews
- Julius-Bernstein-Institute of Physiology, University Halle-Wittenberg, Germany
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Piao C, Cai L, Qiu S, Jia L, Song W, Du J. Complement 5a Enhances Hepatic Metastases of Colon Cancer via Monocyte Chemoattractant Protein-1-mediated Inflammatory Cell Infiltration. J Biol Chem 2015; 290:10667-76. [PMID: 25739439 DOI: 10.1074/jbc.m114.612622] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Indexed: 01/02/2023] Open
Abstract
Complement 5a (C5a), a potent immune mediator generated by complement activation, promotes tumor growth; however, its role in tumor metastasis remains unclear. We demonstrate that C5a contributes to tumor metastases by modulating tumor inflammation in hepatic metastases of colon cancer. Colon cancer cell lines generate C5a under serum-free conditions, and C5a levels increase over time in a murine syngeneic colon cancer hepatic metastasis model. Furthermore, in the absence of C5a receptor or upon pharmacological inhibition of C5a production with an anti-C5 monoclonal antibody, tumor metastasis is severely impaired. A lack of C5a receptor in colon cancer metastatic foci reduces the infiltration of macrophages, neutrophils, and dendritic cells, and the role for C5a receptor on these cells were further verified by bone marrow transplantation experiments. Moreover, C5a signaling increases the expression of the chemokine monocyte chemoattractant protein-1 and the anti-inflammatory molecules arginase-1, interleukin 10, and transforming growth factor β, but is inversely correlated with the expression of pro-inflammatory molecules, which suggests a mechanism for the role of C5a in the inflammatory microenvironment required for tumor metastasis. Our results indicate a new and potentially promising therapeutic application of complement C5a inhibitor for the treatment of malignant tumors.
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Affiliation(s)
- Chunmei Piao
- From the Beijing Anzhen Hospital Affiliated to the Capital Medical University, Beijing 100029 and The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Capital Medical University, Ministry of Education, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing 100029, China
| | - Lun Cai
- From the Beijing Anzhen Hospital Affiliated to the Capital Medical University, Beijing 100029 and
| | - Shulan Qiu
- From the Beijing Anzhen Hospital Affiliated to the Capital Medical University, Beijing 100029 and
| | - Lixin Jia
- From the Beijing Anzhen Hospital Affiliated to the Capital Medical University, Beijing 100029 and
| | - Wenchao Song
- From the Beijing Anzhen Hospital Affiliated to the Capital Medical University, Beijing 100029 and
| | - Jie Du
- From the Beijing Anzhen Hospital Affiliated to the Capital Medical University, Beijing 100029 and The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Capital Medical University, Ministry of Education, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing 100029, China
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Lu Y, Hu XB. C5a stimulates the proliferation of breast cancer cells via Akt-dependent RGC-32 gene activation. Oncol Rep 2014; 32:2817-23. [PMID: 25230890 DOI: 10.3892/or.2014.3489] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 08/14/2014] [Indexed: 11/05/2022] Open
Abstract
Complement system activation contributes to various immune and inflammatory diseases, as well as cancers.However, the role of complement activation in the proliferation of cancer cells is not clear. In the present study, we investigated the consequences of complement activation on the proliferation of breast cancer cells and its possible mechanisms. We focused our study on the potential roles of the anaphylatoxins C3a and C5a in the proliferation of human breast cancer, as two important immune mediators generated after complement activation. Our study revealed that C5a stimulation, but not C3a, enhanced the proliferation of human breast cancer cells in vitro. Moreover, the expression of response gene to complement 32 (RGC-32) was pronounced in breast cancer cells in response to C5a stimulation. Notably, blockade of the C5a receptor markedly reduced the expression of RGC-32 and the proliferation of breast cancer cells stimulated by C5a. Meanwhile, silencing of RGC-32 expression reduced the proliferation of breast cancer cells induced by C5a treatment. Further investigation revealed that Akt activation was involved in C5a-induced RGC-32 expression and breast cancer cell proliferation. In conclusion, the present study indicates that C5a may promote the proliferation of breast cancer cells through Akt1 activation of the RGC-32 gene.
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Affiliation(s)
- Yi Lu
- Department of General Surgery, Suzhou Kowloon Hospital Affiliated with Shanghai Jiao Tong University School of Medicine, Suzhou, Jiangsu 215021, P.R. China
| | - Xiao-Bo Hu
- Department of Breast Surgery, The Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan 410013, P.R. China
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Das D, Barnes MA, Nagy LE. Anaphylatoxin C5a modulates hepatic stellate cell migration. FIBROGENESIS & TISSUE REPAIR 2014; 7:9. [PMID: 24917887 PMCID: PMC4050393 DOI: 10.1186/1755-1536-7-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 04/22/2014] [Indexed: 11/10/2022]
Abstract
BACKGROUND C5a and its cognate receptor, C5a receptor (C5aR), key elements of complement, are critical modulators of liver immunity and fibrosis. However, the molecular mechanism for the cross talk between complement and liver fibrosis is not well understood. C5a is a potent chemokine regulating migration of cells in the innate immune system. Since activation and migration of hepatic stellate cells (HSC) are hallmarks of liver fibrosis, we hypothesized that C5a contributes to fibrosis by regulating HSC activation and/or migration. RESULTS Primary cultures of mouse HSC increased expression of alpha smooth muscle actin (α-SMA) and collagen 1A (Col1A1) mRNA in response to activation on plastic. Expression of mRNA for C5aR, but not C5L2, a second C5a receptor that acts as a negative regulator, increased in parallel with markers of HSC activation in culture. Increased expression of C5aR on activated HSC was confirmed by immunocytochemistry. Cell surface expression of C5aR was also detected by flow cytometry on activated HSC isolated from mice expressing GFP under the control of the collagen promoter after exposure to chronic carbon tetrachloride. To understand the functional significance of C5aR expression in HSC, we next investigated whether C5a influenced HSC activation and/or migration. Challenge of HSC with C5a during culture had no effect on expression of α-SMA and Col1A1, suggesting that C5a did not influence HSC activation. Another important characteristic of HSC is their migratory capacity; migration of HSC in response to platelet derived growth factor (PDGF) and monocyte chemoattractant protein-1 (MCP-1) has been well characterized. Challenge of HSC with C5a enhanced HSC migration almost as efficiently as PDGF in a two-dimensional wound healing and Boyden chamber migration assays. C5a also stimulated expression of MCP-1. C5a-induced cell migration was slowed, but not completely inhibited, in presence of 227016, a MCP-1 receptor antagonist, suggesting C5a-induced migration occurs via both MCP-1-dependent and -independent mechanisms. CONCLUSIONS These data reveal that C5a regulates migration of HSC and suggest a novel mechanism by which complement contributes to hepatic fibrosis. C5a and its receptors are therefore potential therapeutic targets for the prevention and/or treatment of liver fibrosis.
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Affiliation(s)
- Dola Das
- Center for Liver Disease Research, Department of Pathobiology, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio, USA
| | - Mark A Barnes
- Center for Liver Disease Research, Department of Pathobiology, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio, USA ; Department of Molecular Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - Laura E Nagy
- Center for Liver Disease Research, Department of Pathobiology, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio, USA ; Department of Gastroenterology, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio, USA ; Department of Molecular Medicine, Case Western Reserve University, Cleveland, Ohio, USA
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14
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Jakopin Ž. Nucleotide-binding oligomerization domain (NOD) inhibitors: a rational approach toward inhibition of NOD signaling pathway. J Med Chem 2014; 57:6897-918. [PMID: 24707857 DOI: 10.1021/jm401841p] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Dysregulation of nucleotide-binding oligomerization domains 1 and 2 (NOD1 and NOD2) has been implicated in the pathology of various inflammatory disorders, rendering them and their downstream signaling proteins potential therapeutic targets. Selective inhibition of NOD1 and NOD2 signaling could be advantageous in treating many acute and chronic diseases; therefore, harnessing the full potential of NOD inhibitors is a key topic in medicinal chemistry. Although they are among the best studied NOD-like receptors (NLRs), the therapeutic potential of pharmacological modulation of NOD1 and NOD2 is largely unexplored. This review is focused on the scientific progress in the field of NOD inhibitors over the past decade, including the recently reported selective inhibitors of NOD1 and NOD2. In addition, the potential approaches to inhibition of NOD signaling as well as the advantages and disadvantages linked with inhibition of NOD signaling are discussed. Finally, the potential directions for drug discovery are also discussed.
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Affiliation(s)
- Žiga Jakopin
- Faculty of Pharmacy, University of Ljubljana , Aškerčeva 7, SI-1000 Ljubljana, Slovenia
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