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Parwani KK, Branella GM, Burnham RE, Burnham AJ, Bustamante AYS, Foppiani EM, Knight KA, Petrich BG, Horwitz EM, Doering CB, Spencer HT. Directing the migration of serum-free, ex vivo-expanded Vγ9Vδ2 T cells. Front Immunol 2024; 15:1331322. [PMID: 38487542 PMCID: PMC10937339 DOI: 10.3389/fimmu.2024.1331322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 02/07/2024] [Indexed: 03/17/2024] Open
Abstract
Vγ9Vδ2 T cells represent a promising cancer therapy platform because the implementation of allogenic, off-the-shelf product candidates is possible. However, intravenous administration of human Vγ9Vδ2 T cells manufactured under good manufacturing practice (GMP)-compliant, serum-free conditions are not tested easily in most mouse models, mainly because they lack the ability to migrate from the blood to tissues or tumors. We demonstrate that these T cells do not migrate from the circulation to the mouse bone marrow (BM), the site of many malignancies. Thus, there is a need to better characterize human γδ T-cell migration in vivo and develop strategies to direct these cells to in vivo sites of therapeutic interest. To better understand the migration of these cells and possibly influence their migration, NSG mice were conditioned with agents to clear BM cellular compartments, i.e., busulfan or total body irradiation (TBI), or promote T-cell migration to inflamed BM, i.e., incomplete Freund's adjuvant (IFA), prior to administering γδ T cells. Conditioning with TBI, unlike busulfan or IFA, increases the percentage and number of γδ T cells accumulating in the mouse BM, and cells in the peripheral blood (PB) and BM display identical surface protein profiles. To better understand the mechanism by which cells migrate to the BM, mice were conditioned with TBI and administered γδ T cells or tracker-stained red blood cells. The mechanism by which γδ T cells enter the BM after radiation is passive migration from the circulation, not homing. We tested if these ex vivo-expanded cells can migrate based on chemokine expression patterns and showed that it is possible to initiate homing by utilizing highly expressed chemokine receptors on the expanded γδ T cells. γδ T cells highly express CCR2, which provides chemokine attraction to C-C motif chemokine ligand 2 (CCL2)-expressing cells. IFNγ-primed mesenchymal stromal cells (MSCs) (γMSCs) express CCL2, and we developed in vitro and in vivo models to test γδ T-cell homing to CCL2-expressing cells. Using an established neuroblastoma NSG mouse model, we show that intratumorally-injected γMSCs increase the homing of γδ T cells to this tumor. These studies provide insight into the migration of serum-free, ex vivo-expanded Vγ9Vδ2 T cells in NSG mice, which is critical to understanding the fundamental properties of these cells.
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Affiliation(s)
- Kiran K Parwani
- Cancer Biology Program, Graduate Division of Biological and Biomedical Sciences, Emory University, Atlanta, GA, United States
- Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, United States
| | - Gianna M Branella
- Cancer Biology Program, Graduate Division of Biological and Biomedical Sciences, Emory University, Atlanta, GA, United States
- Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, United States
| | - Rebecca E Burnham
- Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, United States
| | - Andre J Burnham
- Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, United States
| | - Austre Y Schiaffino Bustamante
- Cancer Biology Program, Graduate Division of Biological and Biomedical Sciences, Emory University, Atlanta, GA, United States
- Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, United States
| | - Elisabetta Manuela Foppiani
- Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, United States
| | - Kristopher A Knight
- Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, United States
| | | | - Edwin M Horwitz
- Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, United States
| | - Christopher B Doering
- Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, United States
| | - H Trent Spencer
- Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, United States
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Sawant KV, Sepuru KM, Penaranda B, Lowry E, Garofalo RP, Rajarathnam K. Chemokine Cxcl1-Cxcl2 heterodimer is a potent neutrophil chemoattractant. J Leukoc Biol 2023; 114:666-671. [PMID: 37625009 PMCID: PMC10673714 DOI: 10.1093/jleuko/qiad097] [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: 04/12/2023] [Revised: 07/26/2023] [Accepted: 08/01/2023] [Indexed: 08/27/2023] Open
Abstract
Microbial infection is characterized by release of multiple proinflammatory chemokines that direct neutrophils to the insult site. How collective function of these chemokines orchestrates neutrophil recruitment is not known. Here, we characterized the role for heterodimer and show that the Cxcl1-Cxcl2 heterodimer is a potent neutrophil chemoattractant in mice and can recruit more neutrophils than the individual chemokines. Chemokine-mediated neutrophil recruitment is determined by Cxcr2 receptor signaling, Cxcr2 endocytosis, and binding to glycosaminoglycans. We have now determined heterodimer's Cxcr2 activity using cellular assays and Cxcr2 density in blood and recruited neutrophils in heterodimer-treated mice. We have shown that the heterodimer binds glycosaminoglycans with higher affinity and more efficiently than Cxcl1 or Cxcl2. These data collectively indicate that optimal glycosaminoglycan interactions and dampened receptor activity acting in concert in a dynamic fashion promote heterodimer-mediated robust neutrophil recruitment. We propose that this could play a critical role in combating infection.
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Affiliation(s)
- Kirti V Sawant
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX, United States
| | - Krishna Mohan Sepuru
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX, United States
| | - Brigith Penaranda
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX, United States
| | - Emily Lowry
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX, United States
| | - Roberto P Garofalo
- Department of Pediatrics, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX, United States
- Institute for Human Infections and Immunity, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX, United States
| | - Krishna Rajarathnam
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX, United States
- Institute for Human Infections and Immunity, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX, United States
- Sealy Center for Structural Biology and Molecular Biophysics, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX, United States
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3
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Chen J, Bai Y, Xue K, Li Z, Zhu Z, Li Q, Yu C, Li B, Shen S, Qiao P, Li C, Luo Y, Qiao H, Dang E, Yin W, Gudjonsson JE, Wang G, Shao S. CREB1-driven CXCR4 hi neutrophils promote skin inflammation in mouse models and human patients. Nat Commun 2023; 14:5894. [PMID: 37736772 PMCID: PMC10516899 DOI: 10.1038/s41467-023-41484-3] [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: 11/01/2022] [Accepted: 09/06/2023] [Indexed: 09/23/2023] Open
Abstract
Neutrophils have a pathogenic function in inflammation via releasing pro-inflammatory mediators or neutrophil extracellular traps (NETs). However, their heterogeneity and pro-inflammatory mechanisms remain unclear. Here, we demonstrate that CXCR4hi neutrophils accumulate in the blood and inflamed skin in human psoriasis, and correlate with disease severity. Compared to CXCR4lo neutrophils, CXCR4hi neutrophils have enhanced NETs formation, phagocytic function, neutrophil degranulation, and overexpression of pro-inflammatory cytokines and chemokines in vitro. This is accompanied by a metabolic shift in CXCR4hi neutrophils toward glycolysis and lactate release, thereby promoting vascular permeability and remodeling. CXCR4 expression in neutrophils is dependent on CREB1, a transcription factor activated by TNF and CXCL12, and regulated by de novo synthesis. In vivo, CXCR4hi neutrophil infiltration amplifies skin inflammation, whereas blockade of CXCR4hi neutrophils through CXCR4 or CXCL12 inhibition leads to suppression of immune responses. In this work, our study identifies CREB1 as a critical regulator of CXCR4hi neutrophil development and characterizes the contribution of CXCR4hi neutrophils to vascular remodeling and inflammatory responses in skin.
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Affiliation(s)
- Jiaoling Chen
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Yaxing Bai
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Ke Xue
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Zhiguo Li
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Zhenlai Zhu
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Qingyang Li
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Chen Yu
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Bing Li
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Shengxian Shen
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Pei Qiao
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Caixia Li
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Yixin Luo
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Hongjiang Qiao
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Erle Dang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Wen Yin
- Department of Transfusion Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Johann E Gudjonsson
- Department of Dermatology, University of Michigan, Ann Arbor, MI, 48109, USA.
| | - Gang Wang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China.
| | - Shuai Shao
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China.
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4
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Sitaru S, Budke A, Bertini R, Sperandio M. Therapeutic inhibition of CXCR1/2: where do we stand? Intern Emerg Med 2023; 18:1647-1664. [PMID: 37249756 PMCID: PMC10227827 DOI: 10.1007/s11739-023-03309-5] [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: 02/21/2023] [Accepted: 05/10/2023] [Indexed: 05/31/2023]
Abstract
Mounting experimental evidence from in vitro and in vivo animal studies points to an essential role of the CXCL8-CXCR1/2 axis in neutrophils in the pathophysiology of inflammatory and autoimmune diseases. In addition, the pathogenetic involvement of neutrophils and the CXCL8-CXCR1/2 axis in cancer progression and metastasis is increasingly recognized. Consequently, therapeutic targeting of CXCR1/2 or CXCL8 has been intensively investigated in recent years using a wide array of in vitro and animal disease models. While a significant benefit for patients with unwanted neutrophil-mediated inflammatory conditions may be expected from a potential clinical use of inhibitors, their use in severe infections or sepsis might be problematic and should be carefully and thoroughly evaluated in animal models and clinical trials. Translating the approaches using inhibitors of the CXCL8-CXCR1/2 axis to cancer therapy is definitively a new and promising research avenue, which parallels the ongoing efforts to clearly define the involvement of neutrophils and the CXCL8-CXCR1/2 axis in neoplastic diseases. Our narrative review summarizes the current literature on the activation and inhibition of these receptors in neutrophils, key inhibitor classes for CXCR2 and the therapeutic relevance of CXCR2 inhibition focusing here on gastrointestinal diseases.
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Affiliation(s)
- Sebastian Sitaru
- Institute of Cardiovascular Physiology and Pathophysiology, Walter Brendel Center of Experimental Medicine, University Hospital, Ludwig-Maximilian University, Großhaderner Str. 9, Planegg-Martinsried, 82152, Munich, Germany
- Department of Dermatology and Allergy, School of Medicine, Technical University of Munich, Munich, Germany
| | - Agnes Budke
- Institute of Cardiovascular Physiology and Pathophysiology, Walter Brendel Center of Experimental Medicine, University Hospital, Ludwig-Maximilian University, Großhaderner Str. 9, Planegg-Martinsried, 82152, Munich, Germany
| | | | - Markus Sperandio
- Institute of Cardiovascular Physiology and Pathophysiology, Walter Brendel Center of Experimental Medicine, University Hospital, Ludwig-Maximilian University, Großhaderner Str. 9, Planegg-Martinsried, 82152, Munich, Germany.
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5
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Alanko J, Uçar MC, Canigova N, Stopp J, Schwarz J, Merrin J, Hannezo E, Sixt M. CCR7 acts as both a sensor and a sink for CCL19 to coordinate collective leukocyte migration. Sci Immunol 2023; 8:eadc9584. [PMID: 37656776 DOI: 10.1126/sciimmunol.adc9584] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 08/09/2023] [Indexed: 09/03/2023]
Abstract
Immune responses rely on the rapid and coordinated migration of leukocytes. Whereas it is well established that single-cell migration is often guided by gradients of chemokines and other chemoattractants, it remains poorly understood how these gradients are generated, maintained, and modulated. By combining experimental data with theory on leukocyte chemotaxis guided by the G protein-coupled receptor (GPCR) CCR7, we demonstrate that in addition to its role as the sensory receptor that steers migration, CCR7 also acts as a generator and a modulator of chemotactic gradients. Upon exposure to the CCR7 ligand CCL19, dendritic cells (DCs) effectively internalize the receptor and ligand as part of the canonical GPCR desensitization response. We show that CCR7 internalization also acts as an effective sink for the chemoattractant, dynamically shaping the spatiotemporal distribution of the chemokine. This mechanism drives complex collective migration patterns, enabling DCs to create or sharpen chemotactic gradients. We further show that these self-generated gradients can sustain the long-range guidance of DCs, adapt collective migration patterns to the size and geometry of the environment, and provide a guidance cue for other comigrating cells. Such a dual role of CCR7 as a GPCR that both senses and consumes its ligand can thus provide a novel mode of cellular self-organization.
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Affiliation(s)
- Jonna Alanko
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
- MediCity and InFLAMES Research Flagship Center, University of Turku, Turku, Finland
| | - Mehmet Can Uçar
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | - Nikola Canigova
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | - Julian Stopp
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | - Jan Schwarz
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
- Ibidi GmbH, Gräfelfing, Germany
| | - Jack Merrin
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | - Edouard Hannezo
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | - Michael Sixt
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
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6
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Rice CM, Lewis P, Ponce-Garcia FM, Gibbs W, Groves S, Cela D, Hamilton F, Arnold D, Hyams C, Oliver E, Barr R, Goenka A, Davidson A, Wooldridge L, Finn A, Rivino L, Amulic B. Hyperactive immature state and differential CXCR2 expression of neutrophils in severe COVID-19. Life Sci Alliance 2023; 6:6/2/e202201658. [PMID: 36622345 PMCID: PMC9748722 DOI: 10.26508/lsa.202201658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 11/25/2022] [Accepted: 11/28/2022] [Indexed: 12/15/2022] Open
Abstract
Neutrophils are vital in defence against pathogens, but excessive neutrophil activity can lead to tissue damage and promote acute respiratory distress syndrome. COVID-19 is associated with systemic expansion of immature neutrophils, but the functional consequences of this shift to immaturity are not understood. We used flow cytometry to investigate activity and phenotypic diversity of circulating neutrophils in acute and convalescent COVID-19 patients. First, we demonstrate hyperactivation of immature CD10- subpopulations in severe disease, with elevated markers of secondary granule release. Partially activated immature neutrophils were detectable 12 wk post-hospitalisation, indicating long term myeloid dysregulation in convalescent COVID-19 patients. Second, we demonstrate that neutrophils from moderately ill patients down-regulate the chemokine receptor CXCR2, whereas neutrophils from severely ill individuals fail to do so, suggesting an altered ability for organ trafficking and a potential mechanism for induction of disease tolerance. CD10- and CXCR2hi neutrophil subpopulations were enriched in severe disease and may represent prognostic biomarkers for the identification of individuals at high risk of progressing to severe COVID-19.
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Affiliation(s)
- Christopher M Rice
- School of Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Philip Lewis
- University of Bristol Proteomics Facility, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Fernando M Ponce-Garcia
- School of Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Willem Gibbs
- School of Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Sarah Groves
- School of Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Drinalda Cela
- School of Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Fergus Hamilton
- Academic Respiratory Unit, Bristol Medical School, University of Bristol, Southmead Hospital, Bristol, UK
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - David Arnold
- Academic Respiratory Unit, Bristol Medical School, University of Bristol, Southmead Hospital, Bristol, UK
| | - Catherine Hyams
- School of Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK
- Academic Respiratory Unit, Bristol Medical School, University of Bristol, Southmead Hospital, Bristol, UK
| | - Elizabeth Oliver
- School of Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Rachael Barr
- School of Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Anu Goenka
- School of Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Andrew Davidson
- School of Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Linda Wooldridge
- Bristol Veterinary School, Faculty of Health Sciences, University of Bristol, Bristol, UK
| | - Adam Finn
- School of Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Laura Rivino
- School of Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Borko Amulic
- School of Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK
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7
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Myeloid-derived suppressor cells in head and neck squamous cell carcinoma. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2023; 375:33-92. [PMID: 36967154 DOI: 10.1016/bs.ircmb.2022.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Myeloid-derived suppressor cells (MDSCs), which originated from hematopoietic stem cells, are heterogeneous population of cells that have different differentiation patterns and widely presented in tumor microenvironment. For tumor research, myeloid suppressor cells have received extensive attention since their discovery due to their specific immunosuppressive properties, and the mechanisms of immunosuppression and therapeutic approaches for MDSCs have been investigated in a variety of different types of malignancies. To improve the efficacy of treatment for head and neck squamous cell carcinoma (HNSCC), a disease with a high occurrence, immunotherapy has gradually emerged in after traditional surgery and subsequent radiotherapy and chemotherapy, and has made some progress. In this review, we introduced the mechanisms on the development, differentiation, and elimination of MDSCs and provided a detailed overview of the mechanisms behind the immunosuppressive properties of MDSCs. We summarized the recent researches on MDSCs in HNSCC, especially for targeting-MDSCs therapy and combination with other types of therapy such as immune checkpoint blockade (ICB). Furthermore, we looked at drug delivery patterns and collected the current diverse drug delivery systems for the improvement that contributed to therapy against MDSCs in HNSCC. Most importantly, we made possible outlooks for the future research priorities, which provide a basis for further study on the clinical significance and therapeutic value of MDSCs in HNSCC.
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8
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Liu N, Bauer M, Press AT. The immunological function of CXCR2 in the liver during sepsis. J Inflamm (Lond) 2022; 19:23. [DOI: 10.1186/s12950-022-00321-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 11/15/2022] [Indexed: 12/02/2022] Open
Abstract
Abstract
Background
The chemokine receptor CXCR2 and its ligands, especially CXCL8, are crucial mediators for the progression of liver inflammation and liver failure in sepsis. Neutrophils have the highest CXCR2 expression in mice and humans, and their activation via CXCL8 facilitates their migration to the inflamed liver for the clearance of the pathogens and, in turn, the inflammation.
Main body
In sepsis, the inflammatory insult causes extensive neutrophil migration to the liver that overwhelms the immune response. To compensate for the strong receptor activation, CXCR2 desensitizes, incapacitating the immune cells to efficiently clear pathogens, causing further life-threatening liver damage and uncontrolled pathogen spread.
Conclusion
CXCR2 function during infection strongly depends on the expressing cell type. It signals pro- and anti-inflammatory effects that may prompt novel cell-type-specific CXCR2-directed therapeutics.
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Margraf A, Perretti M. Immune Cell Plasticity in Inflammation: Insights into Description and Regulation of Immune Cell Phenotypes. Cells 2022; 11:cells11111824. [PMID: 35681519 PMCID: PMC9180515 DOI: 10.3390/cells11111824] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 05/28/2022] [Accepted: 05/30/2022] [Indexed: 02/01/2023] Open
Abstract
Inflammation is a life-saving immune reaction occurring in response to invading pathogens. Nonetheless, inflammation can also occur in an uncontrolled, unrestricted manner, leading to chronic disease and organ damage. Mechanisms triggering an inflammatory response, hindering such a response, or leading to its resolution are well-studied but so far insufficiently elucidated with regard to precise therapeutic interventions. Notably, as an immune reaction evolves, requirements and environments for immune cells change, and thus cellular phenotypes adapt and shift, leading to the appearance of distinct cellular subpopulations with new functional features. In this article, we aim to highlight properties of, and overarching regulatory factors involved in, the occurrence of immune cell phenotypes with a special focus on neutrophils, macrophages and platelets. Additionally, we point out implications for both diagnostics and therapeutics in inflammation research.
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10
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CXCR2 antagonist SB332235 mitigates deficits in social behavior and dysregulation of Th1/Th22 and T regulatory cell-related transcription factor signaling in male BTBR T+ Itpr3tf/J mouse model of autism. Pharmacol Biochem Behav 2022; 217:173408. [DOI: 10.1016/j.pbb.2022.173408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 05/19/2022] [Accepted: 05/23/2022] [Indexed: 11/22/2022]
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11
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Mihlan M, Glaser KM, Epple MW, Lämmermann T. Neutrophils: Amoeboid Migration and Swarming Dynamics in Tissues. Front Cell Dev Biol 2022; 10:871789. [PMID: 35478973 PMCID: PMC9038224 DOI: 10.3389/fcell.2022.871789] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 03/03/2022] [Indexed: 01/02/2023] Open
Abstract
Neutrophils are key cells of our innate immune response with essential roles for eliminating bacteria and fungi from tissues. They are also the prototype of an amoeboid migrating leukocyte. As one of the first blood-recruited immune cell types during inflammation and infection, these cells can invade almost any tissue compartment. Once in the tissue, neutrophils undergo rapid shape changes and migrate at speeds higher than most other immune cells. They move in a substrate-independent manner in interstitial spaces and do not follow predetermined tissue paths. Instead, neutrophil navigation is largely shaped by the chemokine and chemoattractant milieu around them. This highlights the decisive role of attractant-sensing G-protein coupled receptors (GPCRs) and downstream molecular pathways for controlling amoeboid neutrophil movement in tissues. A diverse repertoire of cell-surface expressed GPCRs makes neutrophils the perfect sentinel cell type to sense and detect danger-associated signals released from wounds, inflamed interstitium, dying cells, complement factors or directly from tissue-invading microbes. Moreover, neutrophils release attractants themselves, which allows communication and coordination between individual cells of a neutrophil population. GPCR-mediated positive feedback mechanisms were shown to underlie neutrophil swarming, a population response that amplifies the recruitment of amoeboid migrating neutrophils to sites of tissue injury and infection. Here we discuss recent findings and current concepts that counteract excessive neutrophil accumulation and swarm formation. In particular, we will focus on negative feedback control mechanisms that terminate neutrophil swarming to maintain the delicate balance between tissue surveillance, host protection and tissue destruction.
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Affiliation(s)
- Michael Mihlan
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Katharina M. Glaser
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
- International Max Planck Research School for Immunobiology, Epigenetics and Metabolism (IMPRS-IEM), Freiburg, Germany
- Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Maximilian W. Epple
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
- International Max Planck Research School for Immunobiology, Epigenetics and Metabolism (IMPRS-IEM), Freiburg, Germany
- Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Tim Lämmermann
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
- *Correspondence: Tim Lämmermann,
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12
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CXCR2 Receptor: Regulation of Expression, Signal Transduction, and Involvement in Cancer. Int J Mol Sci 2022; 23:ijms23042168. [PMID: 35216283 PMCID: PMC8878198 DOI: 10.3390/ijms23042168] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 02/12/2022] [Accepted: 02/14/2022] [Indexed: 01/25/2023] Open
Abstract
Chemokines are a group of about 50 chemotactic cytokines crucial for the migration of immune system cells and tumor cells, as well as for metastasis. One of the 20 chemokine receptors identified to date is CXCR2, a G-protein-coupled receptor (GPCR) whose most known ligands are CXCL8 (IL-8) and CXCL1 (GRO-α). In this article we present a comprehensive review of literature concerning the role of CXCR2 in cancer. We start with regulation of its expression at the transcriptional level and how this regulation involves microRNAs. We show the mechanism of CXCR2 signal transduction, in particular the action of heterotrimeric G proteins, phosphorylation, internalization, intracellular trafficking, sequestration, recycling, and degradation of CXCR2. We discuss in detail the mechanism of the effects of activated CXCR2 on the actin cytoskeleton. Finally, we describe the involvement of CXCR2 in cancer. We focused on the importance of CXCR2 in tumor processes such as proliferation, migration, and invasion of tumor cells as well as the effects of CXCR2 activation on angiogenesis, lymphangiogenesis, and cellular senescence. We also discuss the importance of CXCR2 in cell recruitment to the tumor niche including tumor-associated neutrophils (TAN), tumor-associated macrophages (TAM), myeloid-derived suppressor cells (MDSC), and regulatory T (Treg) cells.
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13
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Pawlik K, Ciechanowska A, Ciapała K, Rojewska E, Makuch W, Mika J. Blockade of CC Chemokine Receptor Type 3 Diminishes Pain and Enhances Opioid Analgesic Potency in a Model of Neuropathic Pain. Front Immunol 2021; 12:781310. [PMID: 34795678 PMCID: PMC8593225 DOI: 10.3389/fimmu.2021.781310] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 10/18/2021] [Indexed: 11/26/2022] Open
Abstract
Neuropathic pain is a serious clinical issue, and its treatment remains a challenge in contemporary medicine. Thus, dynamic development in the area of animal and clinical studies has been observed. The mechanisms of neuropathic pain are still not fully understood; therefore, studies investigating these mechanisms are extremely important. However, much evidence indicates that changes in the activation and infiltration of immune cells cause the release of pronociceptive cytokines and contribute to neuropathic pain development and maintenance. Moreover, these changes are associated with low efficacy of opioids used to treat neuropathy. To date, the role of CC chemokine receptor type 3 (CCR3) in nociception has not been studied. Similarly, little is known about its endogenous ligands (C-C motif ligand; CCL), namely, CCL5, CCL7, CCL11, CCL24, CCL26, and CCL28. Our research showed that the development of hypersensitivity in rats following chronic constriction injury (CCI) of the sciatic nerve is associated with upregulation of CCL7 and CCL11 in the spinal cord and dorsal root ganglia (DRG). Moreover, our results provide the first evidence that single and repeated intrathecal administration of the CCR3 antagonist SB328437 diminishes mechanical and thermal hypersensitivity. Additionally, repeated administration enhances the analgesic properties of morphine and buprenorphine following nerve injury. Simultaneously, the injection of SB328437 reduces the protein levels of some pronociceptive cytokines, such as IL-6, CCL7, and CCL11, in parallel with a reduction in the activation and influx of GFAP-, CD4- and MPO-positive cells in the spinal cord and/or DRG. Moreover, we have shown for the first time that an inhibitor of myeloperoxidase-4-aminobenzoic hydrazide may relieve pain and simultaneously enhance morphine and buprenorphine efficacy. The obtained results indicate the important role of CCR3 and its modulation in neuropathic pain treatment and suggest that it represents an interesting target for future investigations.
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Affiliation(s)
- Katarzyna Pawlik
- Department of Pain Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland
| | - Agata Ciechanowska
- Department of Pain Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland
| | - Katarzyna Ciapała
- Department of Pain Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland
| | - Ewelina Rojewska
- Department of Pain Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland
| | - Wioletta Makuch
- Department of Pain Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland
| | - Joanna Mika
- Department of Pain Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland
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14
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Li X, Shi H, Zhang W, Bai C, He M, Ta N, Huang H, Ning Y, Fang C, Qin H, Dong Y. Immunotherapy and Targeting the Tumor Microenvironment: Current Place and New Insights in Primary Pulmonary NUT Carcinoma. Front Oncol 2021; 11:690115. [PMID: 34660264 PMCID: PMC8515126 DOI: 10.3389/fonc.2021.690115] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 09/13/2021] [Indexed: 12/12/2022] Open
Abstract
Primary pulmonary nuclear protein of testis carcinoma is a rare and highly aggressive malignant tumor. It accounts for approximately 0.22% of primary thoracic tumors and is little known, so it is often misdiagnosed as pulmonary squamous cell carcinoma. No effective treatment has been formed yet, and the prognosis is extremely poor. This review aims to summarize the etiology, pathogenesis, diagnosis, treatment, and prognosis of primary pulmonary nuclear protein of testis carcinoma in order to better recognize it and discuss the current and innovative strategies to overcome it. With the increasing importance of cancer immunotherapy and tumor microenvironment, the review also discusses whether immunotherapy and targeting the tumor microenvironment can improve the prognosis of primary pulmonary nuclear protein of testis carcinoma and possible treatment strategies. We reviewed and summarized the clinicopathological features of all patients with primary pulmonary nuclear protein of testis carcinoma who received immunotherapy, including initial misdiagnosis, disease stage, immunohistochemical markers related to tumor neovascularization, and biomarkers related to immunotherapy, such as PD-L1 (programmed death-ligand 1) and TMB (tumor mutational burden). In the meanwhile, we summarized and analyzed the progression-free survival (PFS) and the overall survival (OS) of patients with primary pulmonary nuclear protein of testis carcinoma treated with PD-1 (programmed cell death protein 1)/PD-L1 inhibitors and explored potential population that may benefit from immunotherapy. To the best of our knowledge, this is the first review on the exploration of the tumor microenvironment and immunotherapy effectiveness in primary pulmonary nuclear protein of testis carcinoma.
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Affiliation(s)
- Xiang Li
- Department of Respiratory and Critical Care Medicine, Changhai Hospital (The First Affiliated Hospital of Naval Medical University), Naval Medical University (Second Military Medical University), Shanghai, China
| | - Hui Shi
- Department of Respiratory and Critical Care Medicine, Changhai Hospital (The First Affiliated Hospital of Naval Medical University), Naval Medical University (Second Military Medical University), Shanghai, China
| | - Wei Zhang
- Department of Respiratory and Critical Care Medicine, Changhai Hospital (The First Affiliated Hospital of Naval Medical University), Naval Medical University (Second Military Medical University), Shanghai, China
| | - Chong Bai
- Department of Respiratory and Critical Care Medicine, Changhai Hospital (The First Affiliated Hospital of Naval Medical University), Naval Medical University (Second Military Medical University), Shanghai, China
| | - Miaoxia He
- Department of Pathology, Changhai Hospital (The First Affiliated Hospital of Naval Medical University), Naval Medical University (Second Military Medical University), Shanghai, China
| | - Na Ta
- Department of Pathology, Changhai Hospital (The First Affiliated Hospital of Naval Medical University), Naval Medical University (Second Military Medical University), Shanghai, China
| | - Haidong Huang
- Department of Respiratory and Critical Care Medicine, Changhai Hospital (The First Affiliated Hospital of Naval Medical University), Naval Medical University (Second Military Medical University), Shanghai, China
| | - Yunye Ning
- Department of Respiratory and Critical Care Medicine, Changhai Hospital (The First Affiliated Hospital of Naval Medical University), Naval Medical University (Second Military Medical University), Shanghai, China
| | - Chen Fang
- Department of Respiratory and Critical Care Medicine, Changhai Hospital (The First Affiliated Hospital of Naval Medical University), Naval Medical University (Second Military Medical University), Shanghai, China
| | - Hao Qin
- Department of Respiratory and Critical Care Medicine, Changhai Hospital (The First Affiliated Hospital of Naval Medical University), Naval Medical University (Second Military Medical University), Shanghai, China
| | - Yuchao Dong
- Department of Respiratory and Critical Care Medicine, Changhai Hospital (The First Affiliated Hospital of Naval Medical University), Naval Medical University (Second Military Medical University), Shanghai, China
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15
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Kienle K, Glaser KM, Eickhoff S, Mihlan M, Knöpper K, Reátegui E, Epple MW, Gunzer M, Baumeister R, Tarrant TK, Germain RN, Irimia D, Kastenmüller W, Lämmermann T. Neutrophils self-limit swarming to contain bacterial growth in vivo. Science 2021; 372:372/6548/eabe7729. [PMID: 34140358 DOI: 10.1126/science.abe7729] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Accepted: 04/29/2021] [Indexed: 12/30/2022]
Abstract
Neutrophils communicate with each other to form swarms in infected organs. Coordination of this population response is critical for the elimination of bacteria and fungi. Using transgenic mice, we found that neutrophils have evolved an intrinsic mechanism to self-limit swarming and avoid uncontrolled aggregation during inflammation. G protein-coupled receptor (GPCR) desensitization acts as a negative feedback control to stop migration of neutrophils when they sense high concentrations of self-secreted attractants that initially amplify swarming. Interference with this process allows neutrophils to scan larger tissue areas for microbes. Unexpectedly, this does not benefit bacterial clearance as containment of proliferating bacteria by neutrophil clusters becomes impeded. Our data reveal how autosignaling stops self-organized swarming behavior and how the finely tuned balance of neutrophil chemotaxis and arrest counteracts bacterial escape.
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Affiliation(s)
- Korbinian Kienle
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.,International Max Planck Research School for Immunobiology, Epigenetics and Metabolism (IMPRS-IEM), Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Katharina M Glaser
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.,International Max Planck Research School for Immunobiology, Epigenetics and Metabolism (IMPRS-IEM), Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Sarah Eickhoff
- Institute of Systems Immunology, University of Würzburg, Max Planck Research Group, Würzburg, Germany
| | - Michael Mihlan
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Konrad Knöpper
- Institute of Systems Immunology, University of Würzburg, Max Planck Research Group, Würzburg, Germany
| | - Eduardo Reátegui
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Shriners Hospital for Children, Boston, MA, USA.,William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, USA
| | - Maximilian W Epple
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.,International Max Planck Research School for Immunobiology, Epigenetics and Metabolism (IMPRS-IEM), Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Matthias Gunzer
- Institute for Experimental Immunology and Imaging, University Hospital, University Duisburg-Essen, Essen, Germany.,Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V., Dortmund, Germany
| | - Ralf Baumeister
- Bioinformatics and Molecular Genetics, Faculty of Biology, Centre for Biochemistry and Molecular Cell Research, Faculty of Medicine, Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
| | - Teresa K Tarrant
- Division of Rheumatology and Immunology, Department of Medicine, Duke University School of Medicine, Durham, NC, USA
| | - Ronald N Germain
- Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Daniel Irimia
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Shriners Hospital for Children, Boston, MA, USA
| | - Wolfgang Kastenmüller
- Institute of Systems Immunology, University of Würzburg, Max Planck Research Group, Würzburg, Germany
| | - Tim Lämmermann
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.
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16
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Selection of a picomolar antibody that targets CXCR2-mediated neutrophil activation and alleviates EAE symptoms. Nat Commun 2021; 12:2547. [PMID: 33953162 PMCID: PMC8100106 DOI: 10.1038/s41467-021-22810-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 03/29/2021] [Indexed: 01/01/2023] Open
Abstract
Receptors and their ligands are important therapeutic targets for about one third of marketed drugs. Here, we describe an epitope-guided approach for selection of antibodies that modulate cellular signaling of targeted receptors. We chose CXC chemokine receptor 2 (CXCR2) in the G-protein coupled receptor superfamily as receptor and a CXCR2 N-terminal peptide for antibody selection. We obtain a highly selective, tight-binding antibody from a 1011-member antibody library using combinatorial enrichment. Structural and Hydrogen-Deuterium-Exchange mass spectrometry analyses demonstrate antibody interaction with an N-terminal region of CXCR2 that is part of the IL-8 epitope. The antibody strongly inhibits IL-8-induced and CXCR2-mediated neutrophil chemotaxis in vitro and alleviates hCXCR2-dependent experimental autoimmune encephalomyelitis symptoms in mice. As inappropriate neutrophil migration accompanies many diseases including inflammatory bowel disease, glomerulonephritis, allergic asthma, chronic obstructive pulmonary disease, and cancer, this antibody has potential for development as a therapeutic agent, akin to anti-TNF antibodies. However, an important difference here is that the antibody targets the chemokine receptor and competes with natural ligand, rather than targeting the ligand itself. CXCR2 is central to neutrophil chemotaxis and hence to some inflammatory diseases. Here the authors demonstrate the value of an epitope-guided antibody panning method to develop a tight binding anti-hCXCR2 antibody, along with crystal structures of this antibody and antigen, that can block neutrophil chemotaxis and protect mice in an EAE model.
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17
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Vishnevskiy DA, Garanina AS, Chernysheva AA, Chekhonin VP, Naumenko VA. Neutrophil and Nanoparticles Delivery to Tumor: Is It Going to Carry That Weight? Adv Healthc Mater 2021; 10:e2002071. [PMID: 33734620 DOI: 10.1002/adhm.202002071] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 02/02/2021] [Indexed: 12/15/2022]
Abstract
The application of cell carriers for transporting nanodrugs to the tumor draws much attention as the alternative to the passive drug delivery. In this concept, the neutrophil (NΦ) is of special interest as this cell is able to uptake nanoparticles (NPs) and cross the vascular barrier in response to tumor signaling. There is a growing body of literature describing NP-NΦ interactions in vitro and in vivo that demonstrates the opportunity of using these cells to improve the efficacy of cancer therapy. However, a number of conceptual and technical issues need to be resolved for translating the technology into clinics. The current review summarizes the recent advances and challenges associated with NP-NΦ interactions, with the special focus on the complex interplay between the NP internalization pathways and the modulation of NΦ activity, and its potential consequences for nanodrug delivery.
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Affiliation(s)
- Daniil A. Vishnevskiy
- V. Serbsky National Medical Research Center for Psychiatry and Narcology Kropotkinskiy Pereulok, 23 Moscow 119034 Russia
- N. I Pirogov Russian National Research Medical University Ulitsa Ostrovityanova, 1 Moscow 117997 Russia
| | - Anastasiia S. Garanina
- National University of Science and Technology (MISIS) Leninskiy Prospekt, 4 Moscow 119049 Russia
| | - Anastasia A. Chernysheva
- V. Serbsky National Medical Research Center for Psychiatry and Narcology Kropotkinskiy Pereulok, 23 Moscow 119034 Russia
| | - Vladimir P. Chekhonin
- V. Serbsky National Medical Research Center for Psychiatry and Narcology Kropotkinskiy Pereulok, 23 Moscow 119034 Russia
- N. I Pirogov Russian National Research Medical University Ulitsa Ostrovityanova, 1 Moscow 117997 Russia
| | - Victor A. Naumenko
- V. Serbsky National Medical Research Center for Psychiatry and Narcology Kropotkinskiy Pereulok, 23 Moscow 119034 Russia
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18
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Bernhard S, Hug S, Stratmann AEP, Erber M, Vidoni L, Knapp CL, Thomaß BD, Fauler M, Nilsson B, Nilsson Ekdahl K, Föhr K, Braun CK, Wohlgemuth L, Huber-Lang M, Messerer DAC. Interleukin 8 Elicits Rapid Physiological Changes in Neutrophils That Are Altered by Inflammatory Conditions. J Innate Immun 2021; 13:225-241. [PMID: 33857948 DOI: 10.1159/000514885] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 01/22/2021] [Indexed: 11/19/2022] Open
Abstract
A sufficient response of neutrophil granulocytes stimulated by interleukin (IL)-8 is vital during systemic inflammation, for example, in sepsis or severe trauma. Moreover, IL-8 is clinically used as biomarker of inflammatory processes. However, the effects of IL-8 on cellular key regulators of neutrophil properties such as the intracellular pH (pHi) in dependence of ion transport proteins and during inflammation remain to be elucidated. Therefore, we investigated in detail the fundamental changes in pHi, cellular shape, and chemotactic activity elicited by IL-8. Using flow cytometric methods, we determined that the IL-8-induced cellular activity was largely dependent on specific ion channels and transporters, such as the sodium-proton exchanger 1 (NHE1) and non-NHE1-dependent sodium flux. Exposing neutrophils in vitro to a proinflammatory micromilieu with N-formyl-Met-Leu-Phe, LPS, or IL-8 resulted in a diminished response regarding the increase in cellular size and pH. The detailed kinetics of the reduced reactivity of the neutrophil granulocytes could be illustrated in a near-real-time flow cytometric measurement. Last, the LPS-mediated impairment of the IL-8-induced response in neutrophils was confirmed in a translational, animal-free human whole blood model. Overall, we provide novel mechanistic insights for the interaction of IL-8 with neutrophil granulocytes and report in detail about its alteration during systemic inflammation.
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Affiliation(s)
- Stefan Bernhard
- Institute of Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | - Stefan Hug
- Institute of Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | | | - Maike Erber
- Institute of Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | - Laura Vidoni
- Institute of Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | - Christiane Leonie Knapp
- Institute of Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | - Bertram Dietrich Thomaß
- Institute of Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | - Michael Fauler
- Institute of General Physiology, University of Ulm, Ulm, Germany
| | - Bo Nilsson
- Rudbeck Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Kristina Nilsson Ekdahl
- Rudbeck Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden.,Centre of Biomaterials Chemistry, Linnaeus University, Kalmar, Sweden
| | - Karl Föhr
- Department of Anesthesiology and Intensive Care Medicine, University Hospital of Ulm, Ulm, Germany
| | - Christian Karl Braun
- Institute of Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany.,Department of Pediatrics and Adolescent Medicine, University Hospital of Ulm, Ulm, Germany
| | - Lisa Wohlgemuth
- Institute of Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | - Markus Huber-Lang
- Institute of Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | - David Alexander Christian Messerer
- Institute of Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany.,Department of Anesthesiology and Intensive Care Medicine, University Hospital of Ulm, Ulm, Germany
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19
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Engemann VI, Rink I, Kilb MF, Hungsberg M, Helmer D, Schmitz K. Cell-based actin polymerization assay to analyze chemokine inhibitors. J Pharmacol Toxicol Methods 2021; 109:107056. [PMID: 33819607 DOI: 10.1016/j.vascn.2021.107056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 03/24/2021] [Accepted: 03/27/2021] [Indexed: 11/29/2022]
Abstract
Chemokines play an important role in various diseases as signaling molecules for immune cells. Therefore, the inhibition of the chemokine-receptor interaction and the characterization of potential inhibitors are important steps in the development of new therapies. Here, we present a new cell-based assay for chemokine-receptor interaction, using chemokine-dependent actin polymerization as a readout. We used interleukin-8 (IL-8, CXCL8) as a model chemokine and measured the IL-8-dependent actin polymerization with Atto565-phalloidin by monitoring the fluorescence intensity in the cell layer after activation with IL-8. This assay needs no transfection, is easy to perform and requires only a few working steps. It can be used to confirm receptor activation and to characterize the effect of chemokine receptor antagonists. Experiments with the well-known CXCR1/2 inhibitor reparixin confirmed that the observed increase in fluorescence intensity is a result of chemokine receptor activation and can be inhibited in a dose-dependent manner. With optimized parameters, the difference between positive and negative control was highly significant and statistical Z´-factors of 0.4 were determined on average.
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Affiliation(s)
- Victoria I Engemann
- Technical University of Darmstadt, Clemens-Schöpf-Institute for Organic Chemistry and Biochemistry, 64287 Darmstadt, Germany
| | - Ina Rink
- Technical University of Darmstadt, Clemens-Schöpf-Institute for Organic Chemistry and Biochemistry, 64287 Darmstadt, Germany
| | - Michelle F Kilb
- Technical University of Darmstadt, Clemens-Schöpf-Institute for Organic Chemistry and Biochemistry, 64287 Darmstadt, Germany.
| | - Maximilian Hungsberg
- Technical University of Darmstadt, Clemens-Schöpf-Institute for Organic Chemistry and Biochemistry, 64287 Darmstadt, Germany.
| | - Dorothea Helmer
- Albert-Ludwigs-University of Freiburg, Department of Microsystems Engineering (IMTEK), 79110 Freiburg im Breisgau, Germany.
| | - Katja Schmitz
- Technical University of Darmstadt, Clemens-Schöpf-Institute for Organic Chemistry and Biochemistry, 64287 Darmstadt, Germany.
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20
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Sawant KV, Sepuru KM, Lowry E, Penaranda B, Frevert CW, Garofalo RP, Rajarathnam K. Neutrophil recruitment by chemokines Cxcl1/KC and Cxcl2/MIP2: Role of Cxcr2 activation and glycosaminoglycan interactions. J Leukoc Biol 2021; 109:777-791. [PMID: 32881070 PMCID: PMC8296306 DOI: 10.1002/jlb.3a0820-207r] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 08/03/2020] [Accepted: 08/07/2020] [Indexed: 12/11/2022] Open
Abstract
Chemokines play a crucial role in combating microbial infection by recruiting blood neutrophils to infected tissue. In mice, the chemokines Cxcl1/KC and Cxcl2/MIP2 fulfill this role. Cxcl1 and Cxcl2 exist as monomers and dimers, and exert their function by activating the Cxcr2 receptor and binding glycosaminoglycans (GAGs). Here, we characterized Cxcr2 G protein and β-arrestin activities, and GAG heparan sulfate (HS) interactions of Cxcl1 and Cxcl2 and of the trapped dimeric variants. To understand how Cxcr2 and GAG interactions impact in vivo function, we characterized their neutrophil recruitment activity to the peritoneum, Cxcr2 and CD11b levels on peritoneal and blood neutrophils, and transport profiles out of the peritoneum. Cxcl2 variants compared with Cxcl1 variants were more potent for Cxcr2 activity. Native Cxcl1 compared with native Cxcl2 and dimers compared with native proteins bound HS with higher affinity. Interestingly, recruitment activity between native Cxcl1 and Cxcl2, between dimers, and between the native protein and the dimer could be similar or very different depending on the dose or the time point. These data indicate that peritoneal neutrophil recruitment cannot be solely attributed to Cxcr2 or GAG interactions, and that the relationship between recruited neutrophils, Cxcr2 activation, GAG interactions, and chemokine levels is complex and highly context dependent. We propose that the ability of Cxcl1 and Cxcl2 to reversibly exist as monomers and dimers and differences in their Cxcr2 activity and GAG interactions coordinate neutrophil recruitment and activation, which play a critical role for successful resolution of inflammation.
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Affiliation(s)
- Kirti V. Sawant
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas, USA
| | - Krishna Mohan Sepuru
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas, USA
| | - Emily Lowry
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas, USA
| | - Brigith Penaranda
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas, USA
| | - Charles W. Frevert
- Department of Comparative Medicine and Center for Lung Biology, University of Washington, Seattle, WA, USA
| | - Roberto P. Garofalo
- Department of Pediatrics, The University of Texas Medical Branch, Galveston, Texas, USA
- Department of Microbiology and Immunology, The University of Texas Medical Branch, Galveston, Texas, USA
| | - Krishna Rajarathnam
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas, USA
- Department of Pediatrics, The University of Texas Medical Branch, Galveston, Texas, USA
- Sealy Center for Structural Biology and Molecular Biophysics, The University of Texas Medical Branch, Galveston, Texas, USA
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21
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Metzemaekers M, Mortier A, Vacchini A, Boff D, Yu K, Janssens R, Farina FM, Milanesi S, Berghmans N, Pörtner N, Van Damme J, Allegretti M, Teixeira MM, Locati M, Borroni EM, Amaral FA, Proost P. Endogenous modification of the chemoattractant CXCL5 alters receptor usage and enhances its activity toward neutrophils and monocytes. Sci Signal 2021; 14:14/673/eaax3053. [PMID: 33688078 DOI: 10.1126/scisignal.aax3053] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The inflammatory human chemokine CXCL5 interacts with the G protein-coupled receptor CXCR2 to induce chemotaxis and activation of neutrophils. CXCL5 also has weak agonist activity toward CXCR1. The N-terminus of CXCL5 can be modified by proteolytic cleavage or deimination of Arg9 to citrulline (Cit), and these modifications can occur separately or together. Here, we chemically synthesized native CXCL5(1-78), truncated CXCL5 [CXCL5(9-78)], and the citrullinated (Cit9) versions and characterized their functions in vitro and in vivo. Compared with full-length CXCL5, N-terminal truncation resulted in enhanced potency to induce G protein signaling and β-arrestin recruitment through CXCR2, increased CXCL5-initiated internalization of CXCR2, and greater Ca2+ signaling downstream of not only CXCR2 but also CXCR1. Citrullination did not affect the capacity of CXCL5 to activate classical or alternative signaling pathways. Administering the various CXCL5 forms to mice revealed that in addition to neutrophils, CXCL5 exerted chemotactic activity toward monocytes and that this activity was increased by N-terminal truncation. These findings were confirmed by in vitro chemotaxis and Ca2+ signaling assays with primary human CD14+ monocytes and human THP-1 monocytes. In vitro and in vivo analyses suggested that CXCL5 targeted monocytes through CXCR1 and CXCR2. Thus, truncation of the N-terminus makes CXCL5 a more potent chemoattractant for both neutrophils and monocytes that acts through CXCR1 and CXCR2.
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Affiliation(s)
- Mieke Metzemaekers
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Herestraat 49 box 1042, Leuven B-3000, Belgium.,Humanitas Clinical and Research Center, IRCCS, via Manzoni 56, 20089 Rozzano, Milan, Italy
| | - Anneleen Mortier
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Herestraat 49 box 1042, Leuven B-3000, Belgium
| | - Alessandro Vacchini
- Humanitas Clinical and Research Center, IRCCS, via Manzoni 56, 20089 Rozzano, Milan, Italy.,Department of Medical Biotechnologies and Translational Medicine, University of Milan, Via Fratelli Cervi 93, I-20090 Segrate, Italy
| | - Daiane Boff
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Herestraat 49 box 1042, Leuven B-3000, Belgium.,Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av Antonio Carlos 6627, Pampulha, Belo Horizonte, Minas Gerais 31270-901, Brasil
| | - Karen Yu
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Herestraat 49 box 1042, Leuven B-3000, Belgium
| | - Rik Janssens
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Herestraat 49 box 1042, Leuven B-3000, Belgium.,Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av Antonio Carlos 6627, Pampulha, Belo Horizonte, Minas Gerais 31270-901, Brasil
| | - Floriana M Farina
- Humanitas Clinical and Research Center, IRCCS, via Manzoni 56, 20089 Rozzano, Milan, Italy
| | - Samantha Milanesi
- Humanitas Clinical and Research Center, IRCCS, via Manzoni 56, 20089 Rozzano, Milan, Italy.,Department of Medical Biotechnologies and Translational Medicine, University of Milan, Via Fratelli Cervi 93, I-20090 Segrate, Italy
| | - Nele Berghmans
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Herestraat 49 box 1042, Leuven B-3000, Belgium
| | - Noëmie Pörtner
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Herestraat 49 box 1042, Leuven B-3000, Belgium
| | - Jo Van Damme
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Herestraat 49 box 1042, Leuven B-3000, Belgium
| | | | - Mauro M Teixeira
- Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av Antonio Carlos 6627, Pampulha, Belo Horizonte, Minas Gerais 31270-901, Brasil
| | - Massimo Locati
- Humanitas Clinical and Research Center, IRCCS, via Manzoni 56, 20089 Rozzano, Milan, Italy.,Department of Medical Biotechnologies and Translational Medicine, University of Milan, Via Fratelli Cervi 93, I-20090 Segrate, Italy
| | - Elena M Borroni
- Humanitas Clinical and Research Center, IRCCS, via Manzoni 56, 20089 Rozzano, Milan, Italy.,Department of Medical Biotechnologies and Translational Medicine, University of Milan, Via Fratelli Cervi 93, I-20090 Segrate, Italy
| | - Flavio A Amaral
- Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av Antonio Carlos 6627, Pampulha, Belo Horizonte, Minas Gerais 31270-901, Brasil
| | - Paul Proost
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Herestraat 49 box 1042, Leuven B-3000, Belgium.
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22
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Garcia G, Kim MH, Morikis VA, Simon SI. Neutrophil Inflammatory Response Is Downregulated by Uptake of Superparamagnetic Iron Oxide Nanoparticle Therapeutics. Front Immunol 2020; 11:571489. [PMID: 33362760 PMCID: PMC7757401 DOI: 10.3389/fimmu.2020.571489] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 10/19/2020] [Indexed: 11/22/2022] Open
Abstract
Superparamagnetic iron oxide nanoparticles (SPION) are employed as diagnostics and therapeutics following intravenous delivery for the treatment of iron deficiency anemia (IDA) in adult patients with chronic kidney failure. Neutrophils are the first defense against blood borne foreign insult and recruit to vascular sites of inflammation via a sequential process that is characterized by adhesive capture, rolling, and shear resistant arrest. A primary chemotactic agonist presented on the glycocalyx of inflamed endothelium is IL-8, which upon binding to its cognate membrane receptor (CXCR1/2) activates a suite of responses in neutrophils. An early response is degranulation with accompanying upregulation of β2-integrin (CD11/CD18) and shedding of L-selectin (CD62L) receptors, which exert differential effects on the efficiency of endothelial recruitment. Feraheme is an FDA approved SPION treatment for IDA, but its effect on the innate immune response of neutrophils during inflammation has not been reported. Here, we studied the immunomodulatory effects of Feraheme on neutrophils freshly isolated from healthy human subjects and stimulated in suspension or on inflammatory mimetic substrates with IL-8. Cells treated with Feraheme exhibited reduced sensitivity to stimulation with IL-8, indicated by reduced upregulation of membrane CD11b/CD18 receptors, high affinity (HA) CD18, and shedding of CD62L. Feraheme also inhibited N-formyl-Met-Leu-Phe (fMLP) induced reactive oxygen species production. Neutrophil rolling, arrest, and migration was assessed in vascular mimetic microfluidic channels coated with E-selectin and ICAM-1 to simulate inflamed endothelium. Neutrophils exposed to Feraheme rolled faster on E-selectin and arrested less frequently on ICAM-1, in a manner dependent upon SPION concentration. Subsequent neutrophil shape change, and migration were also significantly inhibited in the presence of Feraheme. Lastly, Feraheme accelerated clearance of cytosolic calcium flux following IL-8 stimulation. We conclude that uptake of Feraheme by neutrophils inhibits chemotactic activation and downregulates normal rolling to arrest under shear flow. The mechanism involves increased calcium clearance following chemotactic activation, which may diminish the efficiency of recruitment from the circulation at vascular sites of inflammation.
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Affiliation(s)
- Gustavo Garcia
- Department of Biomedical Engineering, University of California, Davis, Davis, CA, United States
| | - Min-Ho Kim
- Department of Biological Sciences, Kent State University, Kent, OH, United States
| | - Vasilios Aris Morikis
- Department of Biomedical Engineering, University of California, Davis, Davis, CA, United States
| | - Scott I. Simon
- Department of Biomedical Engineering, University of California, Davis, Davis, CA, United States
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23
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Wu F, Chen X, Zhai L, Wang H, Sun M, Song C, Wang T, Qian Z. CXCR2 antagonist attenuates neutrophil transmigration into brain in a murine model of LPS induced neuroinflammation. Biochem Biophys Res Commun 2020; 529:839-845. [PMID: 32616311 DOI: 10.1016/j.bbrc.2020.05.124] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 05/17/2020] [Indexed: 10/24/2022]
Abstract
Sepsis-associated encephalopathy (SAE) is a devastating neurological complication of sepsis with intolerable high motility. SAE is accompanied with brain vascular injury, endothelial hyperpermeability, and neutrophil infiltration into the brain tissue, key inflammatory processes leading to further brain edema and neuronal cell apoptosis. Recent studies from us and others suggest that the chemokine receptor C-X-C Motif Chemokine Receptor 2 (CXCR2) is crucial for neutrophil recruitment during SAE. Here we use CXCR2 antagonist SB225002 to characterize the role of CXCR2 in brain infiltration of neutrophil in a murine model of SAE. Systemic administration of high-dose LPS (10 mg/kg) induced evident neutrophil infiltration into the cerebral cortex in wild-type mice. However, CXCR2 antagonist SB225002 markedly attenuated neutrophil infiltration into brain. The CXCR2 expression on neutrophils in the peripheral circulation was dramatically downregulated in response to this LPS dose, and endothelial CXCR2 was significantly upregulated, suggesting endothelial but not neutrophil CXCR2 plays a more important role in neutrophil infiltration into brain. Strikingly, although these CXCR2 antagonist SB225002 treated mice displayed reduced neutrophil infiltration, no change in neutrophil rolling and adhesion was observed. Furthermore, we confirmed that CXCR2 agonist CXCL1 induced a marked increase in actin stress fiber synthesis and paracellular gap formation in cultured cerebral endothelial cells, which is attenuated by SB225002. Thus, these results demonstrate a selective role for endothelial CXCR2 to regulate cerebral vascular permeability and neutrophil transmigration in high-dose LPS induced neuroinflammation, and also suggest a therapeutic potential of CXCR2 antagonist SB225002 in SAE.
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Affiliation(s)
- Fengjiao Wu
- Department of Immunology, School of Laboratory Medicine, Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Xiaofen Chen
- Department of Immunology, School of Laboratory Medicine, Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Liqian Zhai
- Department of Histology and Embryology, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Hongtao Wang
- Department of Immunology, School of Laboratory Medicine, Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Meiqun Sun
- Department of Histology and Embryology, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Chuanwang Song
- Department of Immunology, School of Laboratory Medicine, Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Ting Wang
- Department of Internal Medicine, University of Arizona, Phoenix, AZ, 85004, USA.
| | - Zhongqing Qian
- Department of Immunology, School of Laboratory Medicine, Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical College, Bengbu, Anhui, 233030, China.
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24
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Grigolato F, Egholm C, Impellizzieri D, Arosio P, Boyman O. Establishment of a scalable microfluidic assay for characterization of population-based neutrophil chemotaxis. Allergy 2020; 75:1382-1393. [PMID: 31971608 DOI: 10.1111/all.14195] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 12/06/2019] [Accepted: 12/10/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND Regulation of neutrophil chemotaxis and activation plays crucial roles in immunity, and dysregulated neutrophil responses can lead to pathology as seen in neutrophilic asthma. Neutrophil recruitment is key for initiating immune defense and inflammation, and its modulation is a promising therapeutic target. Microfluidic technology is an attractive tool for characterization of neutrophil migration. Compared to transwell assays, microfluidic approaches could offer several advantages, including precis e control of defined chemokine gradients in space and time, automated quantitative analysis of chemotaxis, and high throughput. METHODS We established a microfluidic device for fully automated, quantitative assessment of neutrophil chemotaxis. Freshly isolated mouse neutrophils from bone marrow or human neutrophils from peripheral blood were assessed in real time using an epifluorescence microscope for their migration toward the potent chemoattractants C-X-C-motif ligand 2 (CXCL2) and CXCL8, without or with interleukin-4 (IL-4) pre-incubation. RESULTS Our microfluidic device allowed the precise and reproducible determination of the optimal CXCL2 and CXCL8 concentrations for mouse and human neutrophil chemotaxis, respectively. Furthermore, our microfluidic assay was able to measure the equilibrium and real-time dynamic effects of specific modulators of neutrophil chemotaxis. We demonstrated this concept by showing that IL-4 receptor signaling in mouse and human neutrophils inhibited their migration toward CXCL2 and CXCL8, respectively, and this inhibition was time-dependent. CONCLUSION Collectively, our microfluidic device shows several advantages over traditional transwell migration assays and its design is amenable to future integration into multiplexed high-throughput platforms for screening of molecules that modulate the chemotaxis of different immune cells.
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Affiliation(s)
- Fulvio Grigolato
- Department of Chemistry and Applied Biosciences Swiss Federal Institute of Technology, Zurich Zurich Switzerland
| | - Cecilie Egholm
- Department of Immunology University Hospital Zurich Zurich Switzerland
| | | | - Paolo Arosio
- Department of Chemistry and Applied Biosciences Swiss Federal Institute of Technology, Zurich Zurich Switzerland
| | - Onur Boyman
- Department of Immunology University Hospital Zurich Zurich Switzerland
- Faculty of Medicine University of Zurich Zurich Switzerland
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25
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Metzemaekers M, Gouwy M, Proost P. Neutrophil chemoattractant receptors in health and disease: double-edged swords. Cell Mol Immunol 2020; 17:433-450. [PMID: 32238918 PMCID: PMC7192912 DOI: 10.1038/s41423-020-0412-0] [Citation(s) in RCA: 210] [Impact Index Per Article: 52.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 03/05/2020] [Indexed: 02/08/2023] Open
Abstract
Neutrophils are frontline cells of the innate immune system. These effector leukocytes are equipped with intriguing antimicrobial machinery and consequently display high cytotoxic potential. Accurate neutrophil recruitment is essential to combat microbes and to restore homeostasis, for inflammation modulation and resolution, wound healing and tissue repair. After fulfilling the appropriate effector functions, however, dampening neutrophil activation and infiltration is crucial to prevent damage to the host. In humans, chemoattractant molecules can be categorized into four biochemical families, i.e., chemotactic lipids, formyl peptides, complement anaphylatoxins and chemokines. They are critically involved in the tight regulation of neutrophil bone marrow storage and egress and in spatial and temporal neutrophil trafficking between organs. Chemoattractants function by activating dedicated heptahelical G protein-coupled receptors (GPCRs). In addition, emerging evidence suggests an important role for atypical chemoattractant receptors (ACKRs) that do not couple to G proteins in fine-tuning neutrophil migratory and functional responses. The expression levels of chemoattractant receptors are dependent on the level of neutrophil maturation and state of activation, with a pivotal modulatory role for the (inflammatory) environment. Here, we provide an overview of chemoattractant receptors expressed by neutrophils in health and disease. Depending on the (patho)physiological context, specific chemoattractant receptors may be up- or downregulated on distinct neutrophil subsets with beneficial or detrimental consequences, thus opening new windows for the identification of disease biomarkers and potential drug targets.
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Affiliation(s)
- Mieke Metzemaekers
- Laboratory of Molecular Immunology, Rega Institute, KU Leuven, Herestraat 49 bus 1042, B-3000, Leuven, Belgium
| | - Mieke Gouwy
- Laboratory of Molecular Immunology, Rega Institute, KU Leuven, Herestraat 49 bus 1042, B-3000, Leuven, Belgium
| | - Paul Proost
- Laboratory of Molecular Immunology, Rega Institute, KU Leuven, Herestraat 49 bus 1042, B-3000, Leuven, Belgium.
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26
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Antonosante A, Brandolini L, d’Angelo M, Benedetti E, Castelli V, Maestro MD, Luzzi S, Giordano A, Cimini A, Allegretti M. Autocrine CXCL8-dependent invasiveness triggers modulation of actin cytoskeletal network and cell dynamics. Aging (Albany NY) 2020; 12:1928-1951. [PMID: 31986121 PMCID: PMC7053615 DOI: 10.18632/aging.102733] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 01/02/2020] [Indexed: 06/10/2023]
Abstract
Glioblastoma (GB) is the most representative form of primary malignant brain tumour. Several studies indicated a pleiotropic role of CXCL8 in cancer due to its ability to modulate the tumour microenvironment, growth and aggressiveness of tumour cell. Previous studies indicated that CXCL8 by its receptors (CXCR1 and CXCR2) induced activation of the PI3K/p-Akt pathway, a crucial event in the regulation of cytoskeleton rearrangement and cell mobilization. Human GB primary cell culture and U-87MG cell line were used to study the effects of CXCR1 and CXCR2 blockage, by a dual allosteric antagonist, on cell migration and cytoskeletal dynamics. The data obtained point towards a specific effect of autocrine CXCL8 signalling on GB cell invasiveness by the activation of pathways involved in cell migration and cytoskeletal dynamics, such as PI3K/p-Akt/p-FAK, p-cortactin, RhoA, Cdc42, Acetylated α-tubulin and MMP2. All the data obtained support the concept that autocrine CXCL8 signalling plays a key role in the activation of an aggressive phenotype in primary glioblastoma cells and U-87MG cell line. These results provide new insights about the potential of a pharmacological approach targeting CXCR1/CXCR2 pathways to decrease migration and invasion of GB cells in the brain parenchyma, one of the principal mechanisms of recurrence.
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Affiliation(s)
- Andrea Antonosante
- Department of Life, Health and Environmental Sciences, University of L’Aquila, L’Aquila, Italy
| | | | - Michele d’Angelo
- Department of Life, Health and Environmental Sciences, University of L’Aquila, L’Aquila, Italy
| | - Elisabetta Benedetti
- Department of Life, Health and Environmental Sciences, University of L’Aquila, L’Aquila, Italy
| | - Vanessa Castelli
- Department of Life, Health and Environmental Sciences, University of L’Aquila, L’Aquila, Italy
| | | | - Sabino Luzzi
- San Matteo Hospital, University of Pavia, Pavia, Italy
| | - Antonio Giordano
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
- Sbarro Institute for Cancer Research and Molecular Medicine and Center for Biotechnology, Temple University, Philadelphia, PA 19122, USA
| | - Annamaria Cimini
- Department of Life, Health and Environmental Sciences, University of L’Aquila, L’Aquila, Italy
- Sbarro Institute for Cancer Research and Molecular Medicine and Center for Biotechnology, Temple University, Philadelphia, PA 19122, USA
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27
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Lämmermann T, Kastenmüller W. Concepts of GPCR-controlled navigation in the immune system. Immunol Rev 2020; 289:205-231. [PMID: 30977203 PMCID: PMC6487968 DOI: 10.1111/imr.12752] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 02/01/2019] [Accepted: 02/03/2019] [Indexed: 12/11/2022]
Abstract
G‐protein–coupled receptor (GPCR) signaling is essential for the spatiotemporal control of leukocyte dynamics during immune responses. For efficient navigation through mammalian tissues, most leukocyte types express more than one GPCR on their surface and sense a wide range of chemokines and chemoattractants, leading to basic forms of leukocyte movement (chemokinesis, haptokinesis, chemotaxis, haptotaxis, and chemorepulsion). How leukocytes integrate multiple GPCR signals and make directional decisions in lymphoid and inflamed tissues is still subject of intense research. Many of our concepts on GPCR‐controlled leukocyte navigation in the presence of multiple GPCR signals derive from in vitro chemotaxis studies and lower vertebrates. In this review, we refer to these concepts and critically contemplate their relevance for the directional movement of several leukocyte subsets (neutrophils, T cells, and dendritic cells) in the complexity of mouse tissues. We discuss how leukocyte navigation can be regulated at the level of only a single GPCR (surface expression, competitive antagonism, oligomerization, homologous desensitization, and receptor internalization) or multiple GPCRs (synergy, hierarchical and non‐hierarchical competition, sequential signaling, heterologous desensitization, and agonist scavenging). In particular, we will highlight recent advances in understanding GPCR‐controlled leukocyte navigation by intravital microscopy of immune cells in mice.
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Affiliation(s)
- Tim Lämmermann
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
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28
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Gonzalez-Aparicio M, Alfaro C. Significance of the IL-8 pathway for immunotherapy. Hum Vaccin Immunother 2019; 16:2312-2317. [PMID: 31860375 DOI: 10.1080/21645515.2019.1696075] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
IL-8 (CXCL-8) is a chemoattractant factor for myeloid leukocytes, that is produced in large quantities by many solid tumors. Levels of IL-8, which can act upon a variety of immune and nonimmune cells, can tell us a lot about tumors, including their size (positive association) and how likely they are to respond to immunotherapy (negative association). This is because the IL-8 produced by tumors can promote angiogenesis, recruit immunosuppressive cells like neutrophils and myeloid-derived suppressor cells (MDSCs), and stimulate epithelial-to-mesenchymal transition, which is a precursor to metastasis. In a pooled analysis of several clinical trials in kidney cancer, melanoma, and lung cancer, it was found that patients with higher baseline concentrations of IL-8 in the blood experienced worse outcomes and lower overall survival after being treated with immunotherapy. Currently, the field that relates IL-8 to immunotherapy is leading to numerous and promising clinical trials that combine the inhibition of IL-8 with existing immunotherapeutic therapies. For this reason, multiple constructs based on IL-8 agonists are being developed clinically by the pharmaceutical and biotech industries.
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Affiliation(s)
- Manuela Gonzalez-Aparicio
- Gene Therapy Program, Fundación para la Investigación Médica Aplicada, CIMA, Universidad de Navarra, Instituto de Investigación Sanitaria de Navarra (IdiSNA) , Pamplona, Spain
| | - Carlos Alfaro
- Immunology and Immunotherapy, Centre for Applied Medical Research (CIMA) , Pamplona, Spain.,Department of Oncology, University Clinic of Navarra , Pamplona, Spain
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29
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Chemokine receptor trafficking coordinates neutrophil clustering and dispersal at wounds in zebrafish. Nat Commun 2019; 10:5166. [PMID: 31727891 PMCID: PMC6856356 DOI: 10.1038/s41467-019-13107-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 10/13/2019] [Indexed: 12/22/2022] Open
Abstract
Immune cells congregate at specific loci to fight infections during inflammatory responses, a process that must be transient and self-resolving. Cell dispersal promotes resolution, but it remains unclear how transition from clustering to dispersal is regulated. Here we show, using quantitative live imaging in zebrafish, that differential ligand-induced trafficking of chemokine receptors such as Cxcr1 and Cxcr2 orchestrates the state of neutrophil congregation at sites of tissue damage. Through receptor mutagenesis and biosensors, we show that Cxcr1 promotes clustering at wound sites, but is promptly desensitized and internalized, which prevents excess congregation. By contrast, Cxcr2 promotes bidirectional motility and is sustained at the plasma membrane. Persistent plasma membrane residence of Cxcr2 prolongs downstream signaling and is required for sustained exploratory motion conducive to dispersal. Thus, differential trafficking of two chemokine receptors allows coordination of antagonistic cell behaviors, promoting a self-resolving migratory response. Inflammatory responses must be induced and resolved timely to serve protection from pathogens without inducing excessive tissue damage. Here the authors use live imaging in zebrafish to show that the intracellular trafficking of two chemokine receptors, Cxcr1 and Cxcr2, is differentially regulated on activated neutrophils to control their clustering and dispersal, respectively.
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30
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Piotrowska A, Rojewska E, Pawlik K, Kreiner G, Ciechanowska A, Makuch W, Nalepa I, Mika J. Pharmacological Blockade of Spinal CXCL3/CXCR2 Signaling by NVP CXCR2 20, a Selective CXCR2 Antagonist, Reduces Neuropathic Pain Following Peripheral Nerve Injury. Front Immunol 2019; 10:2198. [PMID: 31616413 PMCID: PMC6775284 DOI: 10.3389/fimmu.2019.02198] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Accepted: 08/30/2019] [Indexed: 12/25/2022] Open
Abstract
Recently, the role of CXCR2 in nociception has been noted. Our studies provide new evidence that the intrathecal administration of its CINC ligands (Cytokine-Induced Neutrophil Chemoattractant; CXCL1-3) induces pain-like behavior in naïve mice, and the effect occurring shortly after administration is associated with the neural location of CXCR2, as confirmed by immunofluorescence. RT-qPCR analysis showed, for the first time, raised levels of spinal CXCR2 after chronic constriction injury (CCI) of the sciatic nerve in rats. Originally, on day 2, we detected escalated levels of the spinal mRNA of all CINCs associated with enhancement of the protein level of CXCL3 lasting until day 7. Intrathecal administration of CXCL3 neutralizing antibody diminished neuropathic pain on day 7 after CCI. Interestingly, CXCL3 is produced in lipopolysaccharide-stimulated microglial, but not astroglial, primary cell cultures. We present the first evidence that chronic intrathecal administrations of the selective CXCR2 antagonist, NVP CXCR2 20, attenuate neuropathic pain symptoms and CXCL3 expression after CCI. Moreover, in naïve mice, this antagonist prevented CXCL3-induced hypersensitivity. However, NVP CXCR2 20 did not diminish glial activation, thus not enhancing morphine/buprenorphine analgesia. These results provide novel insight into the crucial role of CXCR2 in neuropathy based on CXCL3 modulation, which may become a potential therapeutic target in pain treatment.
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Affiliation(s)
- Anna Piotrowska
- Department of Pain Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Ewelina Rojewska
- Department of Pain Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Katarzyna Pawlik
- Department of Pain Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Grzegorz Kreiner
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Agata Ciechanowska
- Department of Pain Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Wioletta Makuch
- Department of Pain Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Irena Nalepa
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Joanna Mika
- Department of Pain Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
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31
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Influence of Interleukin-8 and Neutrophil Extracellular Trap (NET) Formation in the Tumor Microenvironment: Is There a Pathogenic Role? J Immunol Res 2019; 2019:6252138. [PMID: 31093511 PMCID: PMC6481028 DOI: 10.1155/2019/6252138] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 03/28/2019] [Indexed: 02/06/2023] Open
Abstract
In this review, we will highlight several studies that revolve around interleukin-8 (IL-8) and show the multiple facets that could take in the tumor microenvironment. Chemokines that attract neutrophils (to a large extent, IL-8) can have a bimodal behavior inducing the migration of them in the first place and later favoring the formation of NETs in the place of emission focus of the chemokine. Also, this mechanism occurs when neutrophils migrate to tumor cells and where the extrusion of NETs in the tumor is observed. A possible participation of NETs in cancer progression was considered; however, until now, it is difficult to decide if NETosis plays a pro- or antitumor role, although it is necessary to emphasize that there is more experimentation focused on the protumorigenic aspect of the NETs. The formation of NETs has a relevant role in the inhibition of the immune response against the tumor generated by neutrophils and in turn favoring the processes involved in the development of tumor metastasis. It is striking that we do not have more complete information about the effects of circulating chemokines on neutrophils in cancer patients and hence the suitability of this review. No one has observed to date the impact that it could have on other cell populations to inhibit the arrival of neutrophils and the formation/elimination of NETs. However, the extent to which NETs affect the function of other cells of the immune system in the tumor context has not been directly demonstrated. It is necessary to identify possible combinations of immunotherapy that involve the modulation of neutrophil activity with other strategies (immunomodulatory antibodies or adoptive cell therapy). Therefore, knowing the mechanisms by which tumors take advantage of this ability of neutrophils to form NETs is very important in the search for antitumor therapies and thus be able to take advantage of the possible immunotherapeutic combinations that we currently have in clinical practice.
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32
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Sun L, Clavijo PE, Robbins Y, Patel P, Friedman J, Greene S, Das R, Silvin C, Van Waes C, Horn LA, Schlom J, Palena C, Maeda D, Zebala J, Allen CT. Inhibiting myeloid-derived suppressor cell trafficking enhances T cell immunotherapy. JCI Insight 2019; 4:126853. [PMID: 30944253 DOI: 10.1172/jci.insight.126853] [Citation(s) in RCA: 146] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 02/21/2019] [Indexed: 12/22/2022] Open
Abstract
Recruitment of myeloid-derived suppressor cells (MDSCs) into tumors induces local immunosuppression in carcinomas. Here, we assessed whether SX-682, an orally bioavailable small-molecule inhibitor of CXCR1 and CXCR2, could block tumor MDSC recruitment and enhance T cell activation and antitumor immunity following multiple forms of immunotherapy. CXCR2+ neutrophilic MDSCs (PMN-MDSCs) were the most abundant myeloid cell subset within oral and lung syngeneic carcinomas. PMN-MDSCs demonstrated greater suppression of tumor-infiltrating lymphocyte killing of targets compared with macrophages. SX-682 significantly inhibited trafficking of PMN-MDSCs without altering CXCR2 ligand expression. Trafficking of CXCR1+ macrophages was unaltered, possibly due to coexpression of CSF1R. Reduced PMN-MDSC tumor infiltration correlated with enhanced accumulation of endogenous or adoptively transferred T cells. Accordingly, tumor growth inhibition or the rate of established tumor rejection following programed death-axis (PD-axis) immune checkpoint blockade or adoptive cell transfer of engineered T cells was enhanced in combination with SX-682. Despite CXCR1/2 expression on tumor cells, SX-682 appeared to have little direct antitumor effect on these carcinoma models. These data suggest that tumor-infiltrating CXCR2+ PMN-MDSCs may prevent optimal responses following both PD-axis immune checkpoint blockade and adoptive T cell transfer therapy. Abrogation of PMN-MDSC trafficking with SX-682 enhances T cell-based immunotherapeutic efficacy and may be of benefit to patients with MDSC-infiltrated cancers.
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Affiliation(s)
| | | | | | | | | | | | - Rita Das
- Tumor Biology Section, National Institute on Deafness and Other Communication Disorders, NIH, Bethesda, Maryland, USA
| | - Chris Silvin
- Tumor Biology Section, National Institute on Deafness and Other Communication Disorders, NIH, Bethesda, Maryland, USA
| | - Carter Van Waes
- Tumor Biology Section, National Institute on Deafness and Other Communication Disorders, NIH, Bethesda, Maryland, USA
| | - Lucas A Horn
- Laboratory of Tumor Immunology and Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - Jeffrey Schlom
- Laboratory of Tumor Immunology and Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - Claudia Palena
- Laboratory of Tumor Immunology and Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - Dean Maeda
- Syntrix Pharmaceuticals, Auburn, Washington, USA
| | - John Zebala
- Syntrix Pharmaceuticals, Auburn, Washington, USA
| | - Clint T Allen
- Translation Tumor Immunology Program and.,Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
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Vacchini A, Mortier A, Proost P, Locati M, Metzemaekers M, Borroni EM. Differential Effects of Posttranslational Modifications of CXCL8/Interleukin-8 on CXCR1 and CXCR2 Internalization and Signaling Properties. Int J Mol Sci 2018; 19:E3768. [PMID: 30486423 PMCID: PMC6321254 DOI: 10.3390/ijms19123768] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 11/19/2018] [Accepted: 11/23/2018] [Indexed: 12/21/2022] Open
Abstract
CXCL8 or interleukin (IL)-8 directs neutrophil migration and activation through interaction with CXCR1 and CXCR2 that belong to the family of G protein-coupled receptors (GPCRs). Naturally occurring posttranslational modifications of the NH₂-terminal region of CXCL8 affect its biological activities, but the underlying molecular mechanisms are only partially understood. Here, we studied the implications of site-specific citrullination and truncation for the signaling potency of CXCL8. Native CXCL8(1-77), citrullinated [Cit5]CXCL8(1-77) and the major natural isoform CXCL8(6-77) were chemically synthesized and tested in internalization assays using human neutrophils. Citrullinated and truncated isoforms showed a moderately enhanced capacity to induce internalization of CXCR1 and CXCR2. Moreover, CXCL8-mediated activation of Gαi-dependent signaling through CXCR1 and CXCR2 was increased upon modification to [Cit5]CXCL8(1-77) or CXCL8(6-77). All CXCL8 variants promoted recruitment of β-arrestins 1 and 2 to CXCR1 and CXCR2. Compared to CXCL8(1-77), CXCL8(6-77) showed an enhanced potency to recruit β-arrestin 2 to both receptors, while for [Cit5]CXCL8(1-77) only the capacity to induce β-arrestin 2 recruitment to CXCR2 was increased. Both modifications had no biasing effect, i.e., did not alter the preference of CXCL8 to activate either Gαi-protein or β-arrestin-dependent signaling through its receptors. Our results support the concept that specific chemokine activities are fine-tuned by posttranslational modifications.
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Affiliation(s)
- Alessandro Vacchini
- Humanitas Clinical and Research Center, via Manzoni 56, 20089 Rozzano, Milan, Italy.
- Department of Medical Biotechnologies and Translational Medicine, University of Milan, via fratelli Cervi 93, I-20090 Segrate, Italy.
| | - Anneleen Mortier
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, Herestraat 49 box 1042, B-3000 Leuven, Belgium.
| | - Paul Proost
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, Herestraat 49 box 1042, B-3000 Leuven, Belgium.
| | - Massimo Locati
- Humanitas Clinical and Research Center, via Manzoni 56, 20089 Rozzano, Milan, Italy.
- Department of Medical Biotechnologies and Translational Medicine, University of Milan, via fratelli Cervi 93, I-20090 Segrate, Italy.
| | - Mieke Metzemaekers
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, Herestraat 49 box 1042, B-3000 Leuven, Belgium.
| | - Elena Monica Borroni
- Humanitas Clinical and Research Center, via Manzoni 56, 20089 Rozzano, Milan, Italy.
- Department of Medical Biotechnologies and Translational Medicine, University of Milan, via fratelli Cervi 93, I-20090 Segrate, Italy.
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Yu B, Chen Q, Le Bras A, Zhang L, Xu Q. Vascular Stem/Progenitor Cell Migration and Differentiation in Atherosclerosis. Antioxid Redox Signal 2018; 29:219-235. [PMID: 28537424 DOI: 10.1089/ars.2017.7171] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
SIGNIFICANCE Atherosclerosis is a major cause for the death of human beings, and it takes place in large- and middle-sized arteries. The pathogenesis of the disease has been widely investigated, and new findings on vascular stem/progenitor cells could have an impact on vascular regeneration. Recent Advances: Recent studies have shown that abundant stem/progenitor cells present in the vessel wall are mainly responsible for cell accumulation in the intima during vascular remodeling. It has been demonstrated that the mobilization and recruitment of tissue-resident stem/progenitor cells give rise to endothelial and smooth muscle cells (SMCs) that participate in vascular repair and remodeling such as neointimal hyperplasia and arteriosclerosis. Interestingly, cell lineage tracing studies indicate that a large proportion of SMCs in neointimal lesions is derived from adventitial stem/progenitor cells. CRITICAL ISSUES The influence of stem/progenitor cell behavior on the development of atherosclerosis is crucial. An understanding of the regulatory mechanisms that control stem/progenitor cell migration and differentiation is essential for stem/progenitor cell therapy for vascular diseases and regenerative medicine. FUTURE DIRECTIONS Identification of the detailed process driving the migration and differentiation of vascular stem/progenitor cells during the development of atherosclerosis, discovery of the environmental cues, and signaling pathways that control cell fate within the vasculature will facilitate the development of new preventive and therapeutic strategies to combat atherosclerosis. Antioxid. Redox Signal. 00, 000-000.
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Affiliation(s)
- Baoqi Yu
- 1 Department of Emergency, Guangdong General Hospital , Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Qishan Chen
- 2 Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University , Hangzhou, China
| | - Alexandra Le Bras
- 3 Cardiovascular Division, King's College London BHF Centre , London, United Kingdom
| | - Li Zhang
- 2 Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University , Hangzhou, China
| | - Qingbo Xu
- 3 Cardiovascular Division, King's College London BHF Centre , London, United Kingdom
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Alhussien MN, Dang AK. Pathogen-dependent modulation of milk neutrophils competence, plasma inflammatory cytokines and milk quality during intramammary infection of Sahiwal (Bos indicus) cows. Microb Pathog 2018; 121:131-138. [PMID: 29787791 DOI: 10.1016/j.micpath.2018.05.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 05/18/2018] [Accepted: 05/18/2018] [Indexed: 01/24/2023]
Abstract
The aim of the current study was to investigate the responses of milk neutrophils and plasma inflammatory cytokines to various mastitis pathogens and subsequently on milk composition. Milk was collected from healthy (n = 10) and clinical mastitis indigenous Sahiwal cows naturally infected either with gram-positive bacteria mainly S. aureus (n = 10) and Strep. agalactiae (n = 10) or with gram-negative bacteria, E. coli (n = 10). Phagocytic activity of milk neutrophils decreased in all mastitis cows with the lowest values recorded during gram-positive bacterial infections. Maximum plasma cortisol levels were observed in cows infected with gram-positive bacteria and were positively correlated with the milk neutrophils percentage and negatively correlated with the phagocytic activity of neutrophils and expression of glucocorticoid receptor. The plasma concentrations of IL-2 and IL-8 increased in all mastitis groups with maximum values recorded during E. coli infections. Unlike gram-negative bacterial infections, gram-positive bacterial infections evoked a minimal tumor necrosis factor-α (TNF-α), and IL-6 response. Milk somatic cell counts, fat, protein, pH and electrical conductivity increased in mastitis cows with the highest values exhibited by Strep. agalactiae infection. The expression of chemokine receptors (CXCR1, CXCR2), IL-8 and CD11b was maximum in mastitis neutrophils infected with E. coli. The expression of glucocorticoid receptor (GRα) decreased in all mastitis groups with the lowest values were found in S. aureus infection. Among the various mastitis pathogens, Strep. agalactiae showed maximum adverse effect on milk quality. Attenuated neutrophils, TNF-α and IL-6 response in cows infected by gram-positive bacteria may contribute to the establishment of chronic mastitis.
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Affiliation(s)
- Mohanned Naif Alhussien
- Lactation and Immuno-Physiology Laboratory, ICAR-National Dairy Research Institute, Karnal 132001, Haryana, India.
| | - Ajay Kumar Dang
- Lactation and Immuno-Physiology Laboratory, ICAR-National Dairy Research Institute, Karnal 132001, Haryana, India.
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Davies ML, Dambaeva SV, Katukurundage D, Repak M, Gilman‐Sachs A, Kwak‐Kim J, Beaman KD. Predicting
NK
cell subsets using gene expression levels in peripheral blood and endometrial biopsy specimens. Am J Reprod Immunol 2017; 78. [DOI: 10.1111/aji.12730] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 06/22/2017] [Indexed: 12/15/2022] Open
Affiliation(s)
- Michael L. Davies
- Clinical Immunology LaboratoryRosalind Franklin University of Medicine and Science North Chicago IL USA
- Department of Microbiology and ImmunologyRosalind Franklin University of Medicine and Science North Chicago IL USA
| | - Svetlana V. Dambaeva
- Clinical Immunology LaboratoryRosalind Franklin University of Medicine and Science North Chicago IL USA
- Department of Microbiology and ImmunologyRosalind Franklin University of Medicine and Science North Chicago IL USA
| | - Dimantha Katukurundage
- Clinical Immunology LaboratoryRosalind Franklin University of Medicine and Science North Chicago IL USA
| | - Miroslava Repak
- Department of Microbiology and ImmunologyRosalind Franklin University of Medicine and Science North Chicago IL USA
| | - Alice Gilman‐Sachs
- Clinical Immunology LaboratoryRosalind Franklin University of Medicine and Science North Chicago IL USA
- Department of Microbiology and ImmunologyRosalind Franklin University of Medicine and Science North Chicago IL USA
| | - Joanne Kwak‐Kim
- Department of Microbiology and ImmunologyRosalind Franklin University of Medicine and Science North Chicago IL USA
- Department of Obstetrics and GynecologyRosalind Franklin University Health System Vernon Hills IL USA
| | - Kenneth D. Beaman
- Clinical Immunology LaboratoryRosalind Franklin University of Medicine and Science North Chicago IL USA
- Department of Microbiology and ImmunologyRosalind Franklin University of Medicine and Science North Chicago IL USA
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Chen K, Bao Z, Gong W, Tang P, Yoshimura T, Wang JM. Regulation of inflammation by members of the formyl-peptide receptor family. J Autoimmun 2017; 85:64-77. [PMID: 28689639 DOI: 10.1016/j.jaut.2017.06.012] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 06/29/2017] [Indexed: 12/14/2022]
Abstract
Inflammation is associated with a variety of diseases. The hallmark of inflammation is leukocyte infiltration at disease sites in response to pathogen- or damage-associated chemotactic molecular patterns (PAMPs and MAMPs), which are recognized by a superfamily of seven transmembrane, Gi-protein-coupled receptors (GPCRs) on cell surface. Chemotactic GPCRs are composed of two major subfamilies: the classical GPCRs and chemokine GPCRs. Formyl-peptide receptors (FPRs) belong to the classical chemotactic GPCR subfamily with unique properties that are increasingly appreciated for their expression on diverse host cell types and the capacity to interact with a plethora of chemotactic PAMPs and MAMPs. Three FPRs have been identified in human: FPR1-FPR3, with putative corresponding mouse counterparts. FPR expression was initially described in myeloid cells but subsequently in many non-hematopoietic cells including cancer cells. Accumulating evidence demonstrates that FPRs possess multiple functions in addition to controlling inflammation, and participate in the processes of many pathophysiologic conditions. They are not only critical mediators of myeloid cell trafficking, but are also implicated in tissue repair, angiogenesis and protection against inflammation-associated tumorigenesis. A series recent discoveries have greatly expanded the scope of FPRs in host defense which uncovered the essential participation of FPRs in step-wise trafficking of myeloid cells including neutrophils and dendritic cells (DCs) in host responses to bacterial infection, tissue injury and wound healing. Also of great interest is the FPRs are exploited by malignant cancer cells for their growth, invasion and metastasis. In this article, we review the current understanding of FPRs concerning their expression in a vast array of cell types, their involvement in guiding leukocyte trafficking in pathophysiological conditions, and their capacity to promote the differentiation of immune cells, their participation in tumor-associated inflammation and cancer progression. The close association of FPRs with human diseases and cancer indicates their potential as targets for the development of therapeutics.
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Affiliation(s)
- Keqiang Chen
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD, 21702, USA
| | - Zhiyao Bao
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD, 21702, USA; Department of Pulmonary & Critical Care Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200025, China
| | - Wanghua Gong
- Basic Research Program, Leidos Biomedical Research, Inc., Frederick, MD, 21702, USA
| | - Peng Tang
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD, 21702, USA; Breast and Thyroid Surgery, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Teizo Yoshimura
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, 700-8558, Japan
| | - Ji Ming Wang
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD, 21702, USA.
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Clavijo PE, Moore EC, Chen J, Davis RJ, Friedman J, Kim Y, Van Waes C, Chen Z, Allen CT. Resistance to CTLA-4 checkpoint inhibition reversed through selective elimination of granulocytic myeloid cells. Oncotarget 2017; 8:55804-55820. [PMID: 28915554 PMCID: PMC5593525 DOI: 10.18632/oncotarget.18437] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2017] [Accepted: 05/29/2017] [Indexed: 11/25/2022] Open
Abstract
Purpose Local immunosuppression remains a critical problem that limits clinically meaningful response to checkpoint inhibition in patients with head and neck cancer. Here, we assessed the impact of MDSC elimination on responses to CTLA-4 checkpoint inhibition. Experimental Design Murine syngeneic carcinoma immune infiltrates were characterized by flow cytometry. Granulocytic MDSCs (gMDSCs) were depleted and T-lymphocyte antigen-specific responses were measured. Tumor-bearing mice were treated with MDSC depletion and CTLA-4 checkpoint blockade. Immune signatures within the human HNSCC datasets from The Cancer Genome Atlas (TCGA) were analyzed and differentially expressed genes from sorted human peripheral MDSCs were examined. Results gMDSCs accumulated with tumor progression and correlated with depletion of effector immune cells. Selective depletion of gMDSC restored tumor and draining lymph node antigen-specific T-lymphocyte responses lost with tumor progression. A subset of T-cell inflamed tumors responded to CTLA-4 mAb alone, but the addition of gMDSC depletion induced CD8 T-lymphocyte-dependent rejection of established tumors in all treated mice that resulted in immunologic memory. MDSCs differentially expressed chemokine receptors. Analysis of the head and neck cancer TCGA cohort revealed high CTLA-4 and MDSC-related chemokine and an MDSC-rich gene expression profile with a T-cell inflamed phenotype in > 60% of patients. CXCR2 and CSF1R expression was validated on sorted peripheral blood MDSCs from HNSCC patients. Conclusions MDSCs are a major contributor to local immunosuppression that limits responses to checkpoint inhibition in head and neck cancer. Limitation of MDSC recruitment or function represents a rational strategy to enhance responses to CTLA-4-based checkpoint inhibition in these patients.
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Affiliation(s)
- Paul E Clavijo
- Tumor Biology Section, Head and Neck Surgery Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Ellen C Moore
- Tumor Biology Section, Head and Neck Surgery Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Jianhong Chen
- Tumor Biology Section, Head and Neck Surgery Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Ruth J Davis
- Tumor Biology Section, Head and Neck Surgery Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Jay Friedman
- Tumor Biology Section, Head and Neck Surgery Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Young Kim
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Carter Van Waes
- Tumor Biology Section, Head and Neck Surgery Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Zhong Chen
- Tumor Biology Section, Head and Neck Surgery Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Clint T Allen
- Tumor Biology Section, Head and Neck Surgery Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA.,Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins School of Medicine, Baltimore, MD, USA
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Silva RL, Lopes AH, Guimarães RM, Cunha TM. CXCL1/CXCR2 signaling in pathological pain: Role in peripheral and central sensitization. Neurobiol Dis 2017; 105:109-116. [PMID: 28587921 DOI: 10.1016/j.nbd.2017.06.001] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 05/31/2017] [Accepted: 06/02/2017] [Indexed: 02/04/2023] Open
Abstract
Pathological pain conditions can be triggered after peripheral nerve injury and/or inflammation. It is associated with plasticity of nociceptive pathway in which pain is prolonged even after healing of the injured tissue. Generally combinations of analgesic drugs are not sufficient to achieve selective palliation from chronic pain, besides causing a greater number of side effects. In order to identify novel alternatives for more effective treatments, it is necessary to clarify the underlying mechanisms of pathological pain. It is well established that there are two main components in pathological pain development and maintenance: (i) primary sensory neuron sensitization (peripheral sensitization), and (ii) central sensitization. In both components cytokines and chemokines act as key mediators in pain modulation. CXCL1 is a chemokine that promote both nociceptor and central sensitization via its main receptor CXCR2, which is a promising target for novel analgesic drugs. Here, we reviewed and discussed the role of the CXCL1/CXCR2 signaling axis in pathological pain conditions triggered by either peripheral inflammation or nerve injury.
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Affiliation(s)
- Rangel L Silva
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil.
| | - Alexandre H Lopes
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Rafaela M Guimarães
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil; Graduate Program in Basic and Applied Immunology, Department of Biochemistry and Immunology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Thiago M Cunha
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
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40
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Powell D, Tauzin S, Hind LE, Deng Q, Beebe DJ, Huttenlocher A. Chemokine Signaling and the Regulation of Bidirectional Leukocyte Migration in Interstitial Tissues. Cell Rep 2017; 19:1572-1585. [PMID: 28538177 PMCID: PMC5505660 DOI: 10.1016/j.celrep.2017.04.078] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 03/17/2017] [Accepted: 04/28/2017] [Indexed: 01/02/2023] Open
Abstract
Motile cells navigate through complex tissue environments that include both attractive and repulsive cues. In response to tissue wounding, neutrophils, primary cells of the innate immune response, exhibit bidirectional migration that is orchestrated by chemokines and their receptors. Although progress has been made in identifying signals that mediate the recruitment phase, the mechanisms that regulate neutrophil reverse migration remain largely unknown. Here, we visualize bidirectional neutrophil migration to sterile wounds in zebrafish larvae and identify specific roles for the chemokine receptors Cxcr1 and Cxcr2 in neutrophil recruitment to sterile injury and infection. Notably, we also identify Cxcl8a/Cxcr2 as a specific ligand-receptor pair that orchestrates neutrophil chemokinesis in interstitial tissues during neutrophil reverse migration and resolution of inflammation. Taken together, our findings identify distinct receptors that mediate bidirectional leukocyte motility during interstitial migration depending on the context and type of tissue damage in vivo.
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Affiliation(s)
- Davalyn Powell
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Sebastien Tauzin
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Laurel E Hind
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Qing Deng
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - David J Beebe
- Department of Biomedical Engineering and University of Wisconsin Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Anna Huttenlocher
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI 53706, USA; Department of Pediatrics, University of Wisconsin-Madison, Madison, WI 53706, USA.
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41
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Czepielewski RS, Jaeger N, Marques PE, Antunes MM, Rigo MM, Alvarenga DM, Pereira RV, da Silva RD, Lopes TG, da Silva VD, Porto BN, Menezes GB, Bonorino C. GRPR antagonist protects from drug-induced liver injury by impairing neutrophil chemotaxis and motility. Eur J Immunol 2017; 47:646-657. [DOI: 10.1002/eji.201646394] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 01/03/2017] [Accepted: 03/08/2017] [Indexed: 01/29/2023]
Affiliation(s)
- Rafael S. Czepielewski
- Laboratório de Imunologia Celular e Molecular; Instituto de Pesquisas Biomédicas (IPB); Porto Alegre RS Brazil
| | - Natália Jaeger
- Laboratório de Imunologia Celular e Molecular; Instituto de Pesquisas Biomédicas (IPB); Porto Alegre RS Brazil
| | - Pedro E. Marques
- Departamento de Bioquímica e Imunologia; Laboratório de Imunofarmacologia, UFMG; Belo Horizonte MG Brazil
| | - Maísa M. Antunes
- Center for Gastrointestinal Biology, Departamento de Morfologia; Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais; MG Brazil
| | - Maurício M. Rigo
- Laboratório de Imunologia Celular e Molecular; Instituto de Pesquisas Biomédicas (IPB); Porto Alegre RS Brazil
| | - Débora M. Alvarenga
- Center for Gastrointestinal Biology, Departamento de Morfologia; Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais; MG Brazil
| | - Rafaela V. Pereira
- Center for Gastrointestinal Biology, Departamento de Morfologia; Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais; MG Brazil
| | - Rodrigo D. da Silva
- Laboratório de Imunologia Celular e Molecular; Instituto de Pesquisas Biomédicas (IPB); Porto Alegre RS Brazil
| | - Tiago G. Lopes
- Laboratório de Anatomia Patológica do Hospital São Lucas da PUCRS; Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS); Porto Alegre RS Brazil
| | - Vinícius D. da Silva
- Laboratório de Anatomia Patológica do Hospital São Lucas da PUCRS; Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS); Porto Alegre RS Brazil
| | - Bárbara N. Porto
- Laboratório de Imunologia Clínica e Experimental; Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS); Porto Alegre RS Brazil
| | - Gustavo B. Menezes
- Center for Gastrointestinal Biology, Departamento de Morfologia; Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais; MG Brazil
| | - Cristina Bonorino
- Laboratório de Imunologia Celular e Molecular; Instituto de Pesquisas Biomédicas (IPB); Porto Alegre RS Brazil
- Department of Surgery, School of Medicine; University of California at San Diego; La Jolla California
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42
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Smith JT, Schneider AD, Katchko KM, Yun C, Hsu EL. Environmental Factors Impacting Bone-Relevant Chemokines. Front Endocrinol (Lausanne) 2017; 8:22. [PMID: 28261155 PMCID: PMC5306137 DOI: 10.3389/fendo.2017.00022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 01/25/2017] [Indexed: 01/07/2023] Open
Abstract
Chemokines play an important role in normal bone physiology and the pathophysiology of many bone diseases. The recent increased focus on the individual roles of this class of proteins in the context of bone has shown that members of the two major chemokine subfamilies-CC and CXC-support or promote the formation of new bone and the remodeling of existing bone in response to a myriad of stimuli. These chemotactic molecules are crucial in orchestrating appropriate cellular homing, osteoblastogenesis, and osteoclastogenesis during normal bone repair. Bone healing is a complex cascade of carefully regulated processes, including inflammation, progenitor cell recruitment, differentiation, and remodeling. The extensive role of chemokines in these processes and the known links between environmental contaminants and chemokine expression/activity leaves ample opportunity for disruption of bone healing by environmental factors. However, despite increased clinical awareness, the potential impact of many of these environmental factors on bone-related chemokines is still ill defined. A great deal of focus has been placed on environmental exposure to various endocrine disruptors (bisphenol A, phthalate esters, etc.), volatile organic compounds, dioxins, and heavy metals, though mainly in other tissues. Awareness of the impact of other less well-studied bone toxicants, such as fluoride, mold and fungal toxins, asbestos, and chlorine, is also reviewed. In many cases, the literature on these toxins in osteogenic models is lacking. However, research focused on their effects in other tissues and cell lines provides clues for where future resources could be best utilized. This review aims to serve as a current and exhaustive resource detailing the known links between several classes of high-interest environmental pollutants and their interaction with the chemokines relevant to bone healing.
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Affiliation(s)
- Justin T. Smith
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL, USA
| | - Andrew D. Schneider
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL, USA
| | - Karina M. Katchko
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL, USA
| | - Chawon Yun
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL, USA
| | - Erin L. Hsu
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL, USA
- *Correspondence: Erin L. Hsu,
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Lerner CA, Lei W, Sundar IK, Rahman I. Genetic Ablation of CXCR2 Protects against Cigarette Smoke-Induced Lung Inflammation and Injury. Front Pharmacol 2016; 7:391. [PMID: 27826243 PMCID: PMC5078490 DOI: 10.3389/fphar.2016.00391] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 10/06/2016] [Indexed: 12/27/2022] Open
Abstract
Antagonism of CXCR2 receptors, predominately located on neutrophils and critical for their immunomodulatory activity, is an attractive pharmacological therapeutic approach aimed at reducing the potentially damaging effects of heightened neutrophil influx into the lung. The role CXCR2 in lung inflammation in response to cigarette smoke (CS) inhalation using the mutant mouse approach is not known. We hypothesized that genetic ablation of CXCR2 would protect mice against CS-induced inflammation and DNA damage response. We used CXCR2−/− deficient/mutant (knock-out, KO) mice, and assessed the changes in critical lung inflammatory NF-κB-driven chemokines released from the parenchyma of CS-exposed mice. The extent of tissue damage was assessed by the number of DNA damaging γH2AX positive cells. CXCR2 KO mice exhibited protection from heightened levels of neutrophils measured in BALF taken from mice exposed to CS. IL-8 (KC mouse) levels in the BALF from CS-exposed CXCR2 KO were elevated compared to WT. IL-6 levels in BALF were refractory to increase by CS in CXCR2 KO mice. There were no significant changes to MIP-2, MCP-1, or IL-1β. Total levels of NF-κB were maintained at lower levels in CS-exposed CXCR2 KO mice compared to WT mice exposed to CS. Finally, CXCR2 KO mice were protected from lung cells positive for DNA damage response and senescence marker γH2AX. CXCR2 KO mice are protected from heightened inflammatory response mediated by increased neutrophil response as a result of acute 3 day CS exposure. This is also associated with changes in pro-inflammatory chemokines and reduced incursion of γH2AX indicating CXCR2 deficient mice are protected from lung injury. Thus, CXCR2 may be a pharmacological target in setting of inflammation and DNA damage in the pathogenesis of COPD.
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Affiliation(s)
- Chad A Lerner
- Department of Environmental Medicine, University of Rochester Medical Center Rochester, NY, USA
| | - Wei Lei
- Department of Environmental Medicine, University of Rochester Medical Center Rochester, NY, USA
| | - Isaac K Sundar
- Department of Environmental Medicine, University of Rochester Medical Center Rochester, NY, USA
| | - Irfan Rahman
- Department of Environmental Medicine, University of Rochester Medical Center Rochester, NY, USA
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Moura J, Rodrigues J, Gonçalves M, Amaral C, Lima M, Carvalho E. Impaired T-cell differentiation in diabetic foot ulceration. Cell Mol Immunol 2016; 14:758-769. [PMID: 26996067 DOI: 10.1038/cmi.2015.116] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 12/28/2015] [Accepted: 12/28/2015] [Indexed: 12/31/2022] Open
Abstract
Foot ulceration is one of the most debilitating complications associated with diabetes, but its cause remains poorly understood. Several studies have been undertaken to understand healing kinetics or find possible therapies to enhance healing. However, few studies have been directed at understanding the immunological alterations that could influence wound healing in diabetes. In this study, we analysed the T-cell receptor (TCR) repertoire diversity in TCR-αβ+ T cells. We also analysed the distribution and phenotype of T cells obtained from the peripheral blood of healthy controls and diabetic individuals with or without foot ulcers. Our results showed that diabetic individuals, especially those with foot ulcers, have a significantly lower naive T-cell number and a poorer TCR-Vβ repertoire diversity. We also showed that the reduced TCR-Vβ repertoire diversity in diabetic individuals was mainly owing to the accumulation of effector T cells, the major source of tumour necrosis factor-α production, which was even more pronounced in patients with acute foot ulceration. Moreover, the expression of several inflammatory chemokine receptors was significantly reduced in diabetic patients. In conclusion, effector T-cell accumulation and TCR repertoire diversity reduction appear to precede the development of foot ulcers. This finding may open new immunological therapeutic possibilities and provide a new prognostic tool in diabetic wound care.
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Affiliation(s)
- João Moura
- Center for Neuroscience and Cell Biology (CNC), University of Coimbra, 3004-517 Coimbra, Portugal
| | - João Rodrigues
- Hospital de Santo António (HSA), Centro Hospitalar do Porto (CHP), 4099-001 Porto, Portugal.,Unidade Multidisciplinar de Investigação Biomédica (UMIB/ICBAS/UP), Porto, Portugal
| | - Marta Gonçalves
- Hospital de Santo António (HSA), Centro Hospitalar do Porto (CHP), 4099-001 Porto, Portugal.,Unidade Multidisciplinar de Investigação Biomédica (UMIB/ICBAS/UP), Porto, Portugal
| | - Cláudia Amaral
- Hospital de Santo António (HSA), Centro Hospitalar do Porto (CHP), 4099-001 Porto, Portugal
| | - Margarida Lima
- Hospital de Santo António (HSA), Centro Hospitalar do Porto (CHP), 4099-001 Porto, Portugal.,Unidade Multidisciplinar de Investigação Biomédica (UMIB/ICBAS/UP), Porto, Portugal.,These authors contributed equally to this work
| | - Eugénia Carvalho
- Center for Neuroscience and Cell Biology (CNC), University of Coimbra, 3004-517 Coimbra, Portugal.,Department of Geriatrics, University of Arkansas for Medical Sciences (UAMS), Little Rock, AR 72202, USA.,Arkansas Children's Hospital Research Institute (ACHRI), Little Rock, AR 72202, USA.,These authors contributed equally to this work
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45
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Wang C, Liu Y, Wang Y, Li H, Zhang RX, He MS, Chen L, Wu NN, Liao Y, Deng ZL. Adenovirus-mediated siRNA targeting CXCR2 attenuates titanium particle-induced osteolysis by suppressing osteoclast formation. Med Sci Monit 2016; 22:727-35. [PMID: 26939934 PMCID: PMC4780823 DOI: 10.12659/msm.897243] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Background Wear particle-induced peri-implant loosening is the most common complication affecting long-term outcomes in patients who undergo total joint arthroplasty. Wear particles and by-products from joint replacements may cause chronic local inflammation and foreign body reactions, which can in turn lead to osteolysis. Thus, inhibiting the formation and activity of osteoclasts may improve the functionality and long-term success of total joint arthroplasty. The aim of this study was to interfere with CXC chemokine receptor type 2 (CXCR2) to explore its role in wear particle-induced osteolysis. Material/Methods Morphological and biochemical assays were used to assess osteoclastogenesis in vivo and in vitro. CXCR2 was upregulated in osteoclast formation. Results Local injection with adenovirus-mediated siRNA targeting CXCR2 inhibited titanium-induced osteolysis in a mouse calvarial model in vivo. Furthermore, siCXCR2 suppressed osteoclast formation both directly by acting on osteoclasts themselves and indirectly by altering RANKL and OPG expression in osteoblasts in vitro. Conclusions CXCR2 plays a critical role in particle-induced osteolysis, and siCXCR2 may be a novel treatment for aseptic loosening.
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Affiliation(s)
- Chen Wang
- Department of Orthopedic Surgery, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland)
| | - Yang Liu
- Department of Orthopedic Surgery, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland)
| | - Yang Wang
- Department of Orthopedic Surgery, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland)
| | - Hao Li
- Department of Orthopedic Surgery, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland)
| | - Ran-Xi Zhang
- Department of Orthopedic Surgery, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland)
| | - Mi-Si He
- Department of Gynecologic Oncology, Chongqing Cancer Institute, Chongqing, China (mainland)
| | - Liang Chen
- Department of Orthopedic Surgery, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland)
| | - Ning-Ning Wu
- Department of Clinical Laboratory Testing Diagnostics, Chongqing Medical University, Chongqing, China (mainland)
| | - Yong Liao
- Institute for Viral Hepatitis, Key Laboratory of Molecular Biology for Infectious Diseases, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland)
| | - Zhong-Liang Deng
- Department of Orthopedic Surgery, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland)
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Li L, Chen K, Xiang Y, Yoshimura T, Su S, Zhu J, Bian XW, Wang JM. New development in studies of formyl-peptide receptors: critical roles in host defense. J Leukoc Biol 2015; 99:425-35. [PMID: 26701131 DOI: 10.1189/jlb.2ri0815-354rr] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 12/01/2015] [Indexed: 12/12/2022] Open
Abstract
Formyl-peptide receptors are a family of 7 transmembrane domain, Gi-protein-coupled receptors that possess multiple functions in many pathophysiologic processes because of their expression in a variety of cell types and their capacity to interact with a variety of structurally diverse, chemotactic ligands. Accumulating evidence demonstrates that formyl-peptide receptors are critical mediators of myeloid cell trafficking in the sequential chemotaxis signal relays in microbial infection, inflammation, and immune responses. Formyl-peptide receptors are also involved in the development and progression of cancer. In addition, one of the formyl-peptide receptor family members, Fpr2, is expressed by normal mouse-colon epithelial cells, mediates cell responses to microbial chemotactic agonists, participates in mucosal development and repair, and protects against inflammation-associated tumorigenesis. These novel discoveries greatly expanded the current understanding of the role of formyl-peptide receptors in host defense and as potential molecular targets for the development of therapeutics.
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Affiliation(s)
- Liangzhu Li
- *Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China; Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD, USA; Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Department of Pulmonary Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, China; and Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
| | - Keqiang Chen
- *Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China; Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD, USA; Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Department of Pulmonary Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, China; and Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
| | - Yi Xiang
- *Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China; Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD, USA; Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Department of Pulmonary Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, China; and Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
| | - Teizo Yoshimura
- *Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China; Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD, USA; Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Department of Pulmonary Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, China; and Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
| | - Shaobo Su
- *Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China; Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD, USA; Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Department of Pulmonary Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, China; and Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
| | - Jianwei Zhu
- *Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China; Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD, USA; Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Department of Pulmonary Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, China; and Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
| | - Xiu-wu Bian
- *Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China; Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD, USA; Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Department of Pulmonary Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, China; and Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
| | - Ji Ming Wang
- *Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China; Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD, USA; Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Department of Pulmonary Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, China; and Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
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Malkin AD, Sheehan RP, Mathew S, Federspiel WJ, Redl H, Clermont G. A Neutrophil Phenotype Model for Extracorporeal Treatment of Sepsis. PLoS Comput Biol 2015; 11:e1004314. [PMID: 26468651 PMCID: PMC4607502 DOI: 10.1371/journal.pcbi.1004314] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 05/01/2015] [Indexed: 11/18/2022] Open
Abstract
Neutrophils play a central role in eliminating bacterial pathogens, but may also contribute to end-organ damage in sepsis. Interleukin-8 (IL-8), a key modulator of neutrophil function, signals through neutrophil specific surface receptors CXCR-1 and CXCR-2. In this study a mechanistic computational model was used to evaluate and deploy an extracorporeal sepsis treatment which modulates CXCR-1/2 levels. First, a simplified mechanistic computational model of IL-8 mediated activation of CXCR-1/2 receptors was developed, containing 16 ODEs and 43 parameters. Receptor level dynamics and systemic parameters were coupled with multiple neutrophil phenotypes to generate dynamic populations of activated neutrophils which reduce pathogen load, and/or primed neutrophils which cause adverse tissue damage when misdirected. The mathematical model was calibrated using experimental data from baboons administered a two-hour infusion of E coli and followed for a maximum of 28 days. Ensembles of parameters were generated using a Bayesian parallel tempering approach to produce model fits that could recreate experimental outcomes. Stepwise logistic regression identified seven model parameters as key determinants of mortality. Sensitivity analysis showed that parameters controlling the level of killer cell neutrophils affected the overall systemic damage of individuals. To evaluate rescue strategies and provide probabilistic predictions of their impact on mortality, time of onset, duration, and capture efficacy of an extracorporeal device that modulated neutrophil phenotype were explored. Our findings suggest that interventions aiming to modulate phenotypic composition are time sensitive. When introduced between 3–6 hours of infection for a 72 hour duration, the survivor population increased from 31% to 40–80%. Treatment efficacy quickly diminishes if not introduced within 15 hours of infection. Significant harm is possible with treatment durations ranging from 5–24 hours, which may reduce survival to 13%. In severe sepsis, an extracorporeal treatment which modulates CXCR-1/2 levels has therapeutic potential, but also potential for harm. Further development of the computational model will help guide optimal device development and determine which patient populations should be targeted by treatment. Sepsis occurs when a patient develops a whole body immune response due to infection. In this condition, white blood cells called neutrophils circulate in an active state, seeking and eliminating invading bacteria. However, when neutrophils are activated, healthy tissue is inadvertently targeted, leading to organ damage and potentially death. Even though sepsis kills millions worldwide, there are still no specific treatments approved in the United States. This may be due to the complexity and diversity of the body’s immune response, which can be managed well using computational modeling. We have developed a computational model to predict how different levels of neutrophil activation impact survival in an overactive inflammatory conditions. The model was utilized to assess the effectiveness of a simulated experimental sepsis treatment which modulates neutrophil populations and activity. This evaluation determined that treatment timing plays a critical role in therapeutic effectiveness. When utilized properly the treatment drastically improves survival, but there is also risk of causing patient harm when introduced at the wrong time. We intend for this computational model to support and guide further development of sepsis treatments and help translate these preliminary results from bench to bedside.
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Affiliation(s)
- Alexander D. Malkin
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- * E-mail:
| | - Robert P. Sheehan
- Department of Computational and Systems Biology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Shibin Mathew
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - William J. Federspiel
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Heinz Redl
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology in AUVA center, Vienna, Austria
| | - Gilles Clermont
- CRISMA Center, Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
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Sawant KV, Xu R, Cox R, Hawkins H, Sbrana E, Kolli D, Garofalo RP, Rajarathnam K. Chemokine CXCL1-Mediated Neutrophil Trafficking in the Lung: Role of CXCR2 Activation. J Innate Immun 2015; 7:647-58. [PMID: 26138727 DOI: 10.1159/000430914] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 04/25/2015] [Indexed: 01/13/2023] Open
Abstract
The chemokine CXCL1 and its receptor CXCR2 play a crucial role in host immune response by recruiting and activating neutrophils for microbial killing at the tissue site. Dysregulation in this process has been implicated in collateral tissue damage causing disease. CXCL1 reversibly exists as monomers and dimers, and it has been proposed that distinct monomer and dimer activities and the monomer-dimer equilibrium regulate the neutrophil function. However, the molecular mechanisms linking the CXCL1/CXCR2 axis and the neutrophil 'beneficial' and 'destructive' phenotypes are not known. In this study, we characterized neutrophil trafficking and its consequence in the mouse lung by the CXCL1 wild type (WT), which exists as monomers and dimers, and by a nondissociating dimer. Whereas the WT, compared to the dimer, was more active at low doses, both the WT and the dimer elicited a large neutrophil efflux at high doses. Importantly, robust neutrophil recruitment elicited by the WT or dimer was not detrimental to lung tissue integrity and, further, could not be correlated to surface CXCR2 levels. We conclude that the CXCL1 monomer-dimer distribution and receptor interactions are highly coupled and regulate neutrophil trafficking and that injury in the context of disease is a consequence of inappropriate CXCR2 activation at the target tissue and not due to mechanical forces exerted by neutrophils during recruitment.
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Affiliation(s)
- Kirti V Sawant
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Tex., USA
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Wu F, Zhao Y, Jiao T, Shi D, Zhu X, Zhang M, Shi M, Zhou H. CXCR2 is essential for cerebral endothelial activation and leukocyte recruitment during neuroinflammation. J Neuroinflammation 2015; 12:98. [PMID: 25990934 PMCID: PMC4438521 DOI: 10.1186/s12974-015-0316-6] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 04/30/2015] [Indexed: 01/05/2023] Open
Abstract
Background Chemokines and chemokine receptors cooperate to promote immune cell recruitment to the central nervous system (CNS). In this study, we investigated the roles of CXCR2 and CXCL1 in leukocyte recruitment to the CNS using a murine model of neuroinflammation. Methods Wild-type (WT), CXCL1−/−, and CXCR2−/− mice each received an intracerebroventricular (i.c.v.) injection of lipopolysaccharide (LPS). Esterase staining and intravital microscopy were performed to examine neutrophil recruitment to the brain. To assess endothelial activation in these mice, the expression of adhesion molecules was measured via quantitative real-time polymerase chain reaction (PCR) and Western blotting. To identify the cellular source of functional CXCR2, chimeric mice were generated by transferring bone marrow cells between the WT and CXCR2−/− mice. Results Expression levels of the chemokines CXCL1, CXCL2, and CXCL5 were significantly increased in the brain following the i.c.v. injection of LPS. CXCR2 or CXCL1 deficiency blocked neutrophil infiltration and leukocyte recruitment in the cerebral microvessels. In the CXCR2−/− and CXCL1−/− mice, the cerebral endothelial expression of adhesion molecules such as P-selectin and VCAM-1 was dramatically reduced. Furthermore, the bone marrow transfer experiments demonstrated that CXCR2 expression on CNS-residing cells is essential for cerebral endothelial activation and leukocyte recruitment. Compared with microglia, cultured astrocytes secreted a much higher level of CXCL1 in vitro. Astrocyte culture conditioned medium significantly increased the expression of VCAM-1 and ICAM-1 in cerebral endothelial cells in a CXCR2-dependent manner. Additionally, CXCR2 messenger RNA (mRNA) expression in cerebral endothelial cells but not in microglia or astrocytes was increased following tumor necrosis factor-α (TNF-α) stimulation. The intravenous injection of the CXCR2 antagonist SB225002 significantly inhibited endothelial activation and leukocyte recruitment to cerebral microvessels. Conclusions CXCL1 secreted by astrocytes and endothelial CXCR2 play essential roles in cerebral endothelial activation and subsequent leukocyte recruitment during neuroinflammation.
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Affiliation(s)
- Fengjiao Wu
- Department of Immunology, Nanjing Medical University, 140 Hanzhong Road, Nanjing, JS, 210029, China.
| | - Yawei Zhao
- Department of Immunology, Nanjing Medical University, 140 Hanzhong Road, Nanjing, JS, 210029, China.
| | - Tian Jiao
- Department of Immunology, Nanjing Medical University, 140 Hanzhong Road, Nanjing, JS, 210029, China.
| | - Dongyan Shi
- Department of Immunology, Nanjing Medical University, 140 Hanzhong Road, Nanjing, JS, 210029, China.
| | - Xingxing Zhu
- Department of Immunology, Nanjing Medical University, 140 Hanzhong Road, Nanjing, JS, 210029, China.
| | - Mingshun Zhang
- Department of Immunology, Nanjing Medical University, 140 Hanzhong Road, Nanjing, JS, 210029, China.
| | - Meiqing Shi
- Division of Immunology, Virginia-Maryland College of Veterinary Medicine, University of Maryland, College Park, Maryland, MD, 20742, USA.
| | - Hong Zhou
- Department of Immunology, Nanjing Medical University, 140 Hanzhong Road, Nanjing, JS, 210029, China.
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Alterations in blood leukocytes of G551D-bearing cystic fibrosis patients undergoing treatment with ivacaftor. J Cyst Fibros 2015; 15:67-73. [PMID: 25769931 DOI: 10.1016/j.jcf.2015.02.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2014] [Revised: 02/06/2015] [Accepted: 02/22/2015] [Indexed: 11/24/2022]
Abstract
BACKGROUND Ivacaftor improves clinical outcome by potentiation of mutant G551D CFTR. Due to the presence of CFTR in monocytes and polymorphonuclear neutrophils (PMNs), we hypothesized that ivacaftor may impact leukocyte activation. METHODS We examined blood leukocytes from G551D CF subjects prior to and at one and six months after receiving ivacaftor. Blood leukocytes from ivacaftor-naïve G551D, F508del, and healthy controls were also treated with ivacaftor ex vivo to assess mutation-specific effects. RESULTS Compared to healthy controls, G551D CF subjects had significantly higher expression of active CD11b on PMNs and of CD63 on monocytes, which were normalized by in vivo ivacaftor treatment. Ex vivo exposure to ivacaftor of blood cells from G551D, but not F508del and healthy subjects, resulted in changes in CXCR2 and CD16 expression on PMNs. CONCLUSIONS In vivo and ex vivo exposure of G551D CF leukocytes to ivacaftor resulted in an altered activation profile, suggesting mutation-specific leukocyte modulation.
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