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Klaus T, Hieber C, Bros M, Grabbe S. Integrins in Health and Disease-Suitable Targets for Treatment? Cells 2024; 13:212. [PMID: 38334604 PMCID: PMC10854705 DOI: 10.3390/cells13030212] [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: 12/27/2023] [Revised: 01/13/2024] [Accepted: 01/22/2024] [Indexed: 02/10/2024] Open
Abstract
Integrin receptors are heterodimeric surface receptors that play multiple roles regarding cell-cell communication, signaling, and migration. The four members of the β2 integrin subfamily are composed of an alternative α (CD11a-d) subunit, which determines the specific receptor properties, and a constant β (CD18) subunit. This review aims to present insight into the multiple immunological roles of integrin receptors, with a focus on β2 integrins that are specifically expressed by leukocytes. The pathophysiological role of β2 integrins is confirmed by the drastic phenotype of patients suffering from leukocyte adhesion deficiencies, most often resulting in severe recurrent infections and, at the same time, a predisposition for autoimmune diseases. So far, studies on the role of β2 integrins in vivo employed mice with a constitutive knockout of all β2 integrins or either family member, respectively, which complicated the differentiation between the direct and indirect effects of β2 integrin deficiency for distinct cell types. The recent generation and characterization of transgenic mice with a cell-type-specific knockdown of β2 integrins by our group has enabled the dissection of cell-specific roles of β2 integrins. Further, integrin receptors have been recognized as target receptors for the treatment of inflammatory diseases as well as tumor therapy. However, whereas both agonistic and antagonistic agents yielded beneficial effects in animal models, the success of clinical trials was limited in most cases and was associated with unwanted side effects. This unfavorable outcome is most probably related to the systemic effects of the used compounds on all leukocytes, thereby emphasizing the need to develop formulations that target distinct types of leukocytes to modulate β2 integrin activity for therapeutic applications.
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Affiliation(s)
| | | | | | - Stephan Grabbe
- Department of Dermatology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstraße 1, 55131 Mainz, Germany; (T.K.); (C.H.); (M.B.)
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Keever KR, Cui K, Casteel JL, Singh S, Hoover DB, Williams DL, Pavlov VA, Yakubenko VP. Cholinergic signaling via the α7 nicotinic acetylcholine receptor regulates the migration of monocyte-derived macrophages during acute inflammation. J Neuroinflammation 2024; 21:3. [PMID: 38178134 PMCID: PMC10765732 DOI: 10.1186/s12974-023-03001-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 12/19/2023] [Indexed: 01/06/2024] Open
Abstract
BACKGROUND The involvement of the autonomic nervous system in the regulation of inflammation is an emerging concept with significant potential for clinical applications. Recent studies demonstrate that stimulating the vagus nerve activates the cholinergic anti-inflammatory pathway that inhibits pro-inflammatory cytokines and controls inflammation. The α7 nicotinic acetylcholine receptor (α7nAChR) on macrophages plays a key role in mediating cholinergic anti-inflammatory effects through a downstream intracellular mechanism involving inhibition of NF-κB signaling, which results in suppression of pro-inflammatory cytokine production. However, the role of the α7nAChR in the regulation of other aspects of the immune response, including the recruitment of monocytes/macrophages to the site of inflammation remained poorly understood. RESULTS We observed an increased mortality in α7nAChR-deficient mice (compared with wild-type controls) in mice with endotoxemia, which was paralleled with a significant reduction in the number of monocyte-derived macrophages in the lungs. Corroborating these results, fluorescently labeled α7nAChR-deficient monocytes adoptively transferred to WT mice showed significantly diminished recruitment to the inflamed tissue. α7nAChR deficiency did not affect monocyte 2D transmigration across an endothelial monolayer, but it significantly decreased the migration of macrophages in a 3D fibrin matrix. In vitro analysis of major adhesive receptors (L-selectin, β1 and β2 integrins) and chemokine receptors (CCR2 and CCR5) revealed reduced expression of integrin αM and αX on α7nAChR-deficient macrophages. Decreased expression of αMβ2 was confirmed on fluorescently labeled, adoptively transferred α7nAChR-deficient macrophages in the lungs of endotoxemic mice, indicating a potential mechanism for α7nAChR-mediated migration. CONCLUSIONS We demonstrate a novel role for the α7nAChR in mediating macrophage recruitment to inflamed tissue, which indicates an important new aspect of the cholinergic regulation of immune responses and inflammation.
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Affiliation(s)
- Kasey R Keever
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, PO Box 70582, Johnson, TN, USA
- Center of Excellence in Inflammation, Infectious Disease and Immunity, East Tennessee State University, Johnson, TN, USA
| | - Kui Cui
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, PO Box 70582, Johnson, TN, USA
| | - Jared L Casteel
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, PO Box 70582, Johnson, TN, USA
- Center of Excellence in Inflammation, Infectious Disease and Immunity, East Tennessee State University, Johnson, TN, USA
| | - Sanjay Singh
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, PO Box 70582, Johnson, TN, USA
| | - Donald B Hoover
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, PO Box 70582, Johnson, TN, USA
- Center of Excellence in Inflammation, Infectious Disease and Immunity, East Tennessee State University, Johnson, TN, USA
| | - David L Williams
- Department of Surgery, Quillen College of Medicine, East Tennessee State University, Johnson, TN, USA
- Center of Excellence in Inflammation, Infectious Disease and Immunity, East Tennessee State University, Johnson, TN, USA
| | - Valentin A Pavlov
- Center for Biomedical Science and Center for Bioelectronic Medicine, The Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, USA
- Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, 11550, USA
| | - Valentin P Yakubenko
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, PO Box 70582, Johnson, TN, USA.
- Center of Excellence in Inflammation, Infectious Disease and Immunity, East Tennessee State University, Johnson, TN, USA.
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Zhang YL, Bai J, Yu WJ, Lin QY, Li HH. CD11b mediates hypertensive cardiac remodeling by regulating macrophage infiltration and polarization. J Adv Res 2024; 55:17-31. [PMID: 36822392 PMCID: PMC10770112 DOI: 10.1016/j.jare.2023.02.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 02/12/2023] [Accepted: 02/16/2023] [Indexed: 02/23/2023] Open
Abstract
INTRODUCTION Leukocyte infiltration is an early event during cardiac remodeling frequently leading to heart failure (HF). Integrins mediate leukocyte infiltration during inflammation. However, the importance of specific integrins in hypertensive cardiac remodeling is still unclear. OBJECTIVES To elucidate the significance of CD11b in hypertensive cardiac remodeling. METHODS Angiotensin (Ang II) or deoxycorticosterone acetate (DOCA)-salt was used to induce cardiac remodeling in mice of gene knockout (KO), bone marrow (BM) chimera, and the CD11b neutralizing antibody or agonist leukadherin-1 (LA1) treatment. RESULTS Our microarray data showed that integrin subunits Itgam (CD11b) and Itgb2 (CD18) were the most highly upregulated in Ang II-infused hearts. CD11b expression and CD11b/CD18+ myelomonocytes were also time-dependently increased. KO or pharmacological blockade of CD11b greatly attenuated cardiac remodeling and macrophage infiltration and M1 polarization induced by Ang II or DOCA-salt. This protection was verified in wild-type mice transplanted with CD11b-deficient BM cells. Conversely, administration of CD11b agonist LA1 showed the opposite effects. Further, CD11b KO reduced Ang II-induced macrophage adhesion and M1 polarization, leading to reduction of cardiomyocyte enlargement and fibroblast differentiation in vitro. The numbers of CD14+CD11b+CD18+ monocytes and CD15+CD11b+CD18+ granulocytes were obviously higher in HF patients than in normal controls. CONCLUSION Our data demonstrate an important role of CD11b+ myeloid cells in hypertensive cardiac remodeling, and suggest that HF may benefit from targeting CD11b.
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Affiliation(s)
- Yun-Long Zhang
- Department of Emergency Medicine, Beijing Key Laboratory of Cardiopulmonary Cerebral Resuscitation, Beijing Chao-Yang Hospital, Capital Medical University, No. 8 Worker's Stadium South Road, Beijing 100020, China
| | - Jie Bai
- Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, No.193, Lianhe Road, Xigang District, Dalian 116011, China
| | - Wei-Jia Yu
- Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, No.193, Lianhe Road, Xigang District, Dalian 116011, China
| | - Qiu-Yue Lin
- Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, No.193, Lianhe Road, Xigang District, Dalian 116011, China.
| | - Hui-Hua Li
- Department of Emergency Medicine, Beijing Key Laboratory of Cardiopulmonary Cerebral Resuscitation, Beijing Chao-Yang Hospital, Capital Medical University, No. 8 Worker's Stadium South Road, Beijing 100020, China.
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Hruska P, Kucera J, Kuruczova D, Buzga M, Pekar M, Holeczy P, Potesil D, Zdrahal Z, Bienertova-Vasku J. Unraveling adipose tissue proteomic landscapes in severe obesity: insights into metabolic complications and potential biomarkers. Am J Physiol Endocrinol Metab 2023; 325:E562-E580. [PMID: 37792298 PMCID: PMC10864023 DOI: 10.1152/ajpendo.00153.2023] [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: 05/17/2023] [Revised: 09/25/2023] [Accepted: 09/25/2023] [Indexed: 10/05/2023]
Abstract
In this study, we aimed to comprehensively characterize the proteomic landscapes of subcutaneous adipose tissue (SAT) and visceral adipose tissue (VAT) in patients with severe obesity, to establish their associations with clinical characteristics, and to identify potential serum protein biomarkers indicative of tissue-specific alterations or metabolic states. We conducted a cross-sectional analysis of 32 patients with severe obesity (16 males and 16 females) of Central European descent who underwent bariatric surgery. Clinical parameters and body composition were assessed using dual-energy X-ray absorptiometry (DXA) and bioelectrical impedance, with 15 patients diagnosed with type 2 diabetes (T2D) and 17 with hypertension. Paired SAT and VAT samples, along with serum samples, were subjected to state-of-the-art proteomics liquid chromatography-mass spectrometry (LC-MS). Our analysis identified 7,284 proteins across SAT and VAT, with 1,249 differentially expressed proteins between the tissues and 1,206 proteins identified in serum. Correlation analyses between differential protein expression and clinical traits suggest a significant role of SAT in the pathogenesis of obesity and related metabolic complications. Specifically, the SAT proteomic profile revealed marked alterations in metabolic pathways and processes contributing to tissue fibrosis and inflammation. Although we do not establish a definitive causal relationship, it appears that VAT might respond to SAT metabolic dysfunction by potentially enhancing mitochondrial activity and expanding its capacity. However, when this adaptive response is exceeded, it could possibly contribute to insulin resistance (IR) and in some cases, it may be associated with the progression to T2D. Our findings provide critical insights into the molecular foundations of SAT and VAT in obesity and may inform the development of targeted therapeutic strategies.NEW & NOTEWORTHY This study provides insights into distinct proteomic profiles of subcutaneous adipose tissue (SAT), visceral adipose tissue (VAT), and serum in patients with severe obesity and their associations with clinical traits and body composition. It underscores SAT's crucial role in obesity development and related complications, such as insulin resistance (IR) and type 2 diabetes (T2D). Our findings emphasize the importance of understanding the SAT and VAT balance in energy homeostasis, proteostasis, and the potential role of SAT capacity in the development of metabolic disorders.
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Affiliation(s)
- Pavel Hruska
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Jan Kucera
- RECETOX, Faculty of Science, Masaryk University, Brno, Czech Republic
- Department of Physical Activities and Health Sciences, Faculty of Sports Studies, Masaryk University, Brno, Czech Republic
| | - Daniela Kuruczova
- RECETOX, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Marek Buzga
- Department of Laboratory Medicine, University hospital Ostrava, Ostrava, Czech Republic
- Department of Physiology and Pathophysiology, Faculty of Medicine, University of Ostrava, Ostrava, Czech Republic
| | - Matej Pekar
- Vascular and Miniinvasive Surgery Center, Hospital AGEL Trinec-Podlesi, Trinec, Czech Republic
- Department of Physiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Pavol Holeczy
- Department of Surgery, Vitkovice Hospital, Ostrava, Czech Republic
- Department of Surgical Disciplines, Faculty of Medicine, University of Ostrava, Ostrava, Czech Republic
| | - David Potesil
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Zbynek Zdrahal
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Julie Bienertova-Vasku
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
- RECETOX, Faculty of Science, Masaryk University, Brno, Czech Republic
- Department of Physical Activities and Health Sciences, Faculty of Sports Studies, Masaryk University, Brno, Czech Republic
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Tsukui D, Kimura Y, Kono H. GM-CSF receptor/SYK/JNK/FOXO1/CD11c signaling promotes atherosclerosis. iScience 2023; 26:107293. [PMID: 37520709 PMCID: PMC10382675 DOI: 10.1016/j.isci.2023.107293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 04/30/2023] [Accepted: 07/03/2023] [Indexed: 08/01/2023] Open
Abstract
Atherosclerosis complicates chronic inflammatory diseases, such as rheumatoid arthritis and systemic lupus erythematosus, suggesting that a shared physiological pathway regulates inflammatory responses in these diseases wherein spleen tyrosine kinase (SYK) is involved. We aimed to identify a shared therapeutic target for atherosclerosis and inflammatory diseases. We used Syk-knockout atherosclerosis-prone mice to determine whether SYK is involved in atherosclerosis via the inflammatory response and elucidate the mechanism of SYK signaling. The Syk-knockout mice showed reduced atherosclerosis in vivo, and macrophages derived from this strain showed ameliorated cell migration in vitro. CD11c expression decreased on Syk-knockout monocytes and macrophages; it was upregulated by forkhead box protein O1 (FOXO1) after stimulation with granulocyte-macrophage colony-stimulating factor (GM-CSF), and c-Jun amino-terminal kinase (JNK) mediated SYK signaling to FOXO1. Furthermore, FOXO1 inhibitor treatment mitigated atherosclerosis in mice. Thus, GM-CSF receptor/SYK/JNK/FOXO1/CD11c signaling in monocytes and macrophages and FOXO1 could be therapeutic targets for atherosclerosis and inflammatory diseases.
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Affiliation(s)
- Daisuke Tsukui
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo 173-8605, Japan
| | - Yoshitaka Kimura
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo 173-8605, Japan
- Department of Microbiology and Immunology, Teikyo University School of Medicine, Tokyo 173-8605, Japan
| | - Hajime Kono
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo 173-8605, Japan
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Koelsch N, Mirshahi F, Aqbi HF, Saneshaw M, Idowu MO, Olex AL, Sanyal AJ, Manjili MH. The crosstalking immune cells network creates a collective function beyond the function of each cellular constituent during the progression of hepatocellular carcinoma. Sci Rep 2023; 13:12630. [PMID: 37537225 PMCID: PMC10400568 DOI: 10.1038/s41598-023-39020-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 07/19/2023] [Indexed: 08/05/2023] Open
Abstract
Abundance of data on the role of inflammatory immune responses in the progression or inhibition of hepatocellular carcinoma (HCC) has failed to offer a curative immunotherapy for HCC. This is largely because of focusing on detailed specific cell types and missing the collective function of the hepatic immune system. To discover the collective immune function, we take systems immunology approach by performing high-throughput analysis of snRNAseq data collected from the liver of DIAMOND mice during the progression of nonalcoholic fatty liver disease (NAFLD) to HCC. We report that mutual signaling interactions of the hepatic immune cells in a dominant-subdominant manner, as well as their interaction with structural cells shape the immunological pattern manifesting a collective function beyond the function of the cellular constituents. Such pattern discovery approach recognized direct role of the innate immune cells in the progression of NASH and HCC. These data suggest that discovery of the immune pattern not only detects the immunological mechanism of HCC in spite of dynamic changes in immune cells during the course of disease but also offers immune modulatory interventions for the treatment of NAFLD and HCC.
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Affiliation(s)
- Nicholas Koelsch
- Department of Microbiology & Immunology, Virginia Commonwealth University School of Medicine, Richmond, VA, 23298, USA.
| | - Faridoddin Mirshahi
- Department of Internal Medicine, VCU School of Medicine, Richmond, VA, 23298, USA
| | - Hussein F Aqbi
- College of Science, Mustansiriyah University, P.O. Box 14022, Baghdad, Iraq
| | - Mulugeta Saneshaw
- Department of Internal Medicine, VCU School of Medicine, Richmond, VA, 23298, USA
| | - Michael O Idowu
- Department of Pathology, VCU School of Medicine, Richmond, VA, 23298, USA
- Department of Microbiology & Immunology, VCU Massey Cancer Center, 401 College Street, Box 980035, Richmond, VA, 23298, USA
| | - Amy L Olex
- C. Kenneth and Dianne Wright Center for Clinical and Translational Research, Virginia Commonwealth University School of Medicine, Richmond, USA
| | - Arun J Sanyal
- Department of Internal Medicine, VCU School of Medicine, Richmond, VA, 23298, USA.
- Department of Microbiology & Immunology, VCU Massey Cancer Center, 401 College Street, Box 980035, Richmond, VA, 23298, USA.
| | - Masoud H Manjili
- Department of Microbiology & Immunology, Virginia Commonwealth University School of Medicine, Richmond, VA, 23298, USA.
- Department of Microbiology & Immunology, VCU Massey Cancer Center, 401 College Street, Box 980035, Richmond, VA, 23298, USA.
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Zhang Q, Zhang S, Chen J, Xie Z. The Interplay between Integrins and Immune Cells as a Regulator in Cancer Immunology. Int J Mol Sci 2023; 24:6170. [PMID: 37047140 PMCID: PMC10093897 DOI: 10.3390/ijms24076170] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/20/2023] [Accepted: 03/22/2023] [Indexed: 04/14/2023] Open
Abstract
Integrins are a group of heterodimers consisting of α and β subunits that mediate a variety of physiological activities of immune cells, including cell migration, adhesion, proliferation, survival, and immunotolerance. Multiple types of integrins act differently on the same immune cells, while the same integrin may exert various effects on different immune cells. In the development of cancer, integrins are involved in the regulation of cancer cell proliferation, invasion, migration, and angiogenesis; conversely, integrins promote immune cell aggregation to mediate the elimination of tumors. The important roles of integrins in cancer progression have provided valuable clues for the diagnosis and targeted treatment of cancer. Furthermore, many integrin inhibitors have been investigated in clinical trials to explore effective regimens and reduce side effects. Due to the complexity of the mechanism of integrin-mediated cancer progression, challenges remain in the research and development of cancer immunotherapies (CITs). This review enumerates the effects of integrins on four types of immune cells and the potential mechanisms involved in the progression of cancer, which will provide ideas for more optimal CIT in the future.
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Affiliation(s)
- Qingfang Zhang
- College of Basic Medical, Nanchang University, Nanchang 330006, China
- Queen Mary School, Medical Department, Nanchang University, Nanchang 330031, China
| | - Shuo Zhang
- College of Basic Medical, Nanchang University, Nanchang 330006, China
- Queen Mary School, Medical Department, Nanchang University, Nanchang 330031, China
| | - Jianrui Chen
- College of Basic Medical, Nanchang University, Nanchang 330006, China
- Queen Mary School, Medical Department, Nanchang University, Nanchang 330031, China
| | - Zhenzhen Xie
- College of Basic Medical, Nanchang University, Nanchang 330006, China
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Guha Ray A, Odum OP, Wiseman D, Weinstock A. The diverse roles of macrophages in metabolic inflammation and its resolution. Front Cell Dev Biol 2023; 11:1147434. [PMID: 36994095 PMCID: PMC10041730 DOI: 10.3389/fcell.2023.1147434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 02/14/2023] [Indexed: 03/14/2023] Open
Abstract
Macrophages are one of the most functionally diverse immune cells, indispensable to maintain tissue integrity and metabolic health. Macrophages perform a myriad of functions ranging from promoting inflammation, through inflammation resolution to restoring and maintaining tissue homeostasis. Metabolic diseases encompass a growing list of diseases which develop from a mix of genetics and environmental cues leading to metabolic dysregulation and subsequent inflammation. In this review, we summarize the contributions of macrophages to four metabolic conditions-insulin resistance and adipose tissue inflammation, atherosclerosis, non-alcoholic fatty liver disease and neurodegeneration. The role of macrophages is complex, yet they hold great promise as potential therapies to address these growing health concerns.
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Affiliation(s)
| | | | | | - Ada Weinstock
- Section of Genetic Medicine, Department of Medicine, The University of Chicago, Chicago, IL, United States
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Towards using 3D cellular cultures to model the activation and diverse functions of macrophages. Biochem Soc Trans 2023; 51:387-401. [PMID: 36744644 PMCID: PMC9987999 DOI: 10.1042/bst20221008] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/25/2022] [Accepted: 01/19/2023] [Indexed: 02/07/2023]
Abstract
The advent of 3D cell culture technology promises to enhance understanding of cell biology within tissue microenvironments. Whilst traditional cell culturing methods have been a reliable tool for decades, they inadequately portray the complex environments in which cells inhabit in vivo. The need for better disease models has pushed the development of effective 3D cell models, providing more accurate drug screening assays. There has been great progress in developing 3D tissue models in fields such as cancer research and regenerative medicine, driven by desires to recreate the tumour microenvironment for the discovery of new chemotherapies, or development of artificial tissues or scaffolds for transplantation. Immunology is one field that lacks optimised 3D models and the biology of tissue resident immune cells such as macrophages has yet to be fully explored. This review aims to highlight the benefits of 3D cell culturing for greater understanding of macrophage biology. We review current knowledge of macrophage interactions with their tissue microenvironment and highlight the potential of 3D macrophage models in the development of more effective treatments for disease.
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Lenting PJ, Texier A, Casari C. von Willebrand factor: from figurant to main character in the scene of inflammation. JOURNAL OF THROMBOSIS AND HAEMOSTASIS : JTH 2023; 21:710-713. [PMID: 36754680 DOI: 10.1016/j.jtha.2023.01.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 01/13/2023] [Accepted: 01/13/2023] [Indexed: 01/22/2023]
Affiliation(s)
- Peter J Lenting
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1176, Université Paris-Saclay, Le Kremlin-Bicêtre, France.
| | - Alexis Texier
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1176, Université Paris-Saclay, Le Kremlin-Bicêtre, France
| | - Caterina Casari
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1176, Université Paris-Saclay, Le Kremlin-Bicêtre, France. https://twitter.com/caterinacasari
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Caimi G, Lo Presti R, Carollo C, Montana M, Carlisi M. Polymorphonuclear phenotypical expression of CD18, at baseline and after in vitro activation, in several clinical disorders: Revision of our case series. Clin Hemorheol Microcirc 2023; 85:41-58. [PMID: 37482987 DOI: 10.3233/ch-231771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
BACKGROUND In relation to the different and important roles of the beta2 integrins, we have revisited the expression of polymorphonuclear leukocyte CD18 in several clinical disorders, at baseline and after in vitro activation. SUBJECTS we have examined subjects with type 1 diabetes mellitus, vascular atherosclerotic disease, type 2 diabetes mellitus without and with macrovascular complications, chronic renal failure on conservative treatment, essential hypertension, deep venous thrombosis, acute ischemic stroke and subjects with venous leg ulcers. METHODS unfractioned leukocyte suspension was prepared according to the Mikita's method, while the leukocyte were separated into mononuclear and polymorphonuclear cells with a Ficoll-Hypaque medium. Using specific monoclonal antibody, the CD18 expression was evaluated with cytofluorimetric analysis, using FACScan (Becton Dickinson) be Cellquest software; the activation in vitro with PMA was effected according to modified Yasui and Masuda methods. RESULTS in type 1 diabetes mellitus, at baseline CD18 is under expressed in comparison with normal control, and not changes after PMA activation were observed; in subjects with vascular atherosclerotic disease, in type 2 diabetes mellitus CD18 is over expressed at baseline but does not vary after activation; in subjects with chronic renal failure, essential hypertension and in subjects with acute ischemic stroke the CD18 up-regulate at baseline compared to normal control, and it increases further after activation; in subjects with deep venous thrombosis the CD18 expression is not different from control group at baseline, but it increases after activation; finally, in subjects with venous leg ulcers the CD18 is normally expressed at baseline, and it does not change after PMA activation. CONCLUSIONS in the different clinical disorders, the trend of this integrin subunit provides some specific information, useful to select the best therapeutic strategy in clinical practice.
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Affiliation(s)
- Gregorio Caimi
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy
| | - Rosalia Lo Presti
- Department of Psychology, Educational Science and Human Movement, University of Palermo, Palermo, Italy
| | - Caterina Carollo
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy
| | - Maria Montana
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy
| | - Melania Carlisi
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy
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Lin QY, Bai J, Zhang YL, Li HH. Integrin CD11b Contributes to Hypertension and Vascular Dysfunction Through Mediating Macrophage Adhesion and Migration. Hypertension 2023; 80:57-69. [PMID: 36377602 DOI: 10.1161/hypertensionaha.122.20328] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Leukocyte adhesion to endothelium is an early inflammatory response and is mainly controlled by the β2-integrins. However, the role of integrin CD11b/CD18 in the pathogenesis of hypertension and vascular dysfunction is unclear. METHODS Hypertension was established by angiotensin II (490 ng/kg·per min) or deoxycorticosterone acetate salt. Hypertensive responses were studied in CD11b-deficient (CD11b-/-) mice, bone marrow transplanted and wild-type (WT) mice that were administered anti-CD11b neutralizing antibody or agonist leukadherin-1. Blood pressure was monitored with tail-cuff method and radiotelemetry. Blood and vascular inflammatory cells were assessed by flow cytometry. Aortic remodeling and function were examined using histology and aortic ring analysis. Cell adhesion and migration were evaluated in vitro. The relationship between circulating CD11b+ immune cells and hypertension was analyzed in patients with hypertension. RESULTS We found that CD11b and CD18 expression as well as the CD45+CD11b+CD18+ myeloid cells were highly increased in the aorta of angiotensin II-infused mice. Ablation or pharmacological inhibition of CD11b in mice significantly alleviated hypertension, aortic remodeling, superoxide generation, vascular dysfunction, and the infiltration of CD11b+ macrophages through reducing macrophage adhesion and migration. These effects were confirmed in WT mice reconstituted with CD11b-deficient bone marrow cells. Conversely, angiotensin II-induced hypertensive response was exacerbated by CD11b agonist leukadherin-1. Notably, circulating CD45+CD11b+CD18+ myeloid cells and the ligand levels in hypertensive patients were significantly higher than in normotensive controls. CONCLUSIONS We demonstrated a critical significance of CD11b+ myeloid cells in hypertension and vascular dysfunction. Targeting CD11b may represent a novel therapeutic option for hypertension.
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Affiliation(s)
- Qiu-Yue Lin
- Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, China (Q.-Y.L., J.B., H.-H.L.)
| | - Jie Bai
- Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, China (Q.-Y.L., J.B., H.-H.L.)
| | - Yun-Long Zhang
- Department of Emergency Medicine, Beijing Key Laboratory of Cardiopulmonary Cerebral Resuscitation, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China (Y.-L.Z., H.-H.L.)
| | - Hui-Hua Li
- Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, China (Q.-Y.L., J.B., H.-H.L.).,Department of Emergency Medicine, Beijing Key Laboratory of Cardiopulmonary Cerebral Resuscitation, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China (Y.-L.Z., H.-H.L.)
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13
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Koutsogiannaki S, Hou L, Okuno T, Shibamura-Fujiogi M, Luo HR, Yuki K. αDβ2 as a novel target of experimental polymicrobial sepsis. Front Immunol 2022; 13:1059996. [PMID: 36466931 PMCID: PMC9716080 DOI: 10.3389/fimmu.2022.1059996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 10/17/2022] [Indexed: 11/19/2022] Open
Abstract
Since sepsis was defined three decades ago, it has been a target of intensive study. However, there is no specific sepsis treatment available, with its high mortality and morbidity. αDβ2 (CD11d/CD18) is one of the four β2 integrin members. Its role in sepsis has been limitedly studied. Using an experimental polymicrobial sepsis model, we found that the deficiency of αDβ2 was associated with less lung injury and better outcome, which was in sharp contrast to other β2 integrin member αLβ2 (CD11a/CD18), and αMβ2 (CD11b/CD18). This phenotype was supported by a reduction of bacterial loads in αDβ2 knockout mice. Further analysis showed that the deficiency of αDβ2 led to a reduction of neutrophil cell death as well as an increase in neutrophil phagocytosis in both murine and human systems. Our data showed a unique role of αDβ2 among the β2 integrin members, which would serve as a potential target to improve the outcome of sepsis.
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14
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Dupuy A, Ju LA, Chiu J, Passam FH. Mechano-Redox Control of Integrins in Thromboinflammation. Antioxid Redox Signal 2022; 37:1072-1093. [PMID: 35044225 DOI: 10.1089/ars.2021.0265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Significance: How mechanical forces and biochemical cues are coupled remains a miracle for many biological processes. Integrins, well-known adhesion receptors, sense changes in mechanical forces and reduction-oxidation reactions (redox) in their environment to mediate their adhesive function. The coupling of mechanical and redox function is a new area of investigation. Disturbance of normal mechanical forces and the redox balance occurs in thromboinflammatory conditions; atherosclerotic plaques create changes to the mechanical forces in the circulation. Diabetes induces redox changes in the circulation by the production of reactive oxygen species and vascular inflammation. Recent Advances: Integrins sense changes in the blood flow shear stress at the level of focal adhesions and respond to flow and traction forces by increased signaling. Talin, the integrin-actin linker, is a traction force sensor and adaptor. Oxidation and reduction of integrin disulfide bonds regulate their adhesion. A conserved disulfide bond in integrin αlpha IIb beta 3 (αIIbβ3) is directly reduced by the thiol oxidoreductase endoplasmic reticulum protein 5 (ERp5) under shear stress. Critical Issues: The coordination of mechano-redox events between the extracellular and intracellular compartments is an active area of investigation. Another fundamental issue is to determine the spatiotemporal arrangement of key regulators of integrins' mechanical and redox interactions. How thromboinflammatory conditions lead to mechanoredox uncoupling is relatively unexplored. Future Directions: Integrated approaches, involving disulfide bond biochemistry, microfluidic assays, and dynamic force spectroscopy, will aid in showing that cell adhesion constitutes a crossroad of mechano- and redox biology, within the same molecule, the integrin. Antioxid. Redox Signal. 37, 1072-1093.
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Affiliation(s)
- Alexander Dupuy
- Central Clinical School, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia.,Charles Perkins Centre, The University of Sydney, Camperdown, Australia.,Heart Research Institute, Newtown, Australia
| | - Lining Arnold Ju
- Charles Perkins Centre, The University of Sydney, Camperdown, Australia.,Heart Research Institute, Newtown, Australia.,School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Darlington, Australia
| | - Joyce Chiu
- Charles Perkins Centre, The University of Sydney, Camperdown, Australia.,ACRF Centenary Cancer Research Centre, The Centenary Institute, Camperdown, Australia
| | - Freda H Passam
- Central Clinical School, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia.,Charles Perkins Centre, The University of Sydney, Camperdown, Australia.,Heart Research Institute, Newtown, Australia
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15
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Morgan S, Lee LH, Halu A, Nicolau JS, Higashi H, Ha AH, Wen JR, Daugherty A, Libby P, Cameron SJ, Mix D, Aikawa E, Owens AP, Singh SA, Aikawa M. Identifying novel mechanisms of abdominal aortic aneurysm via unbiased proteomics and systems biology. Front Cardiovasc Med 2022; 9:889994. [PMID: 35990960 PMCID: PMC9382335 DOI: 10.3389/fcvm.2022.889994] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 06/28/2022] [Indexed: 11/16/2022] Open
Abstract
Background Abdominal aortic aneurysm (AAA), characterized by a continued expansion of the aorta, leads to rupture if not surgically repaired. Mice aid the study of disease progression and its underlying mechanisms since sequential studies of aneurysm development are not feasible in humans. The present study used unbiased proteomics and systems biology to understand the molecular relationship between the mouse models of AAA and the human disease. Methods and results Aortic tissues of developing and established aneurysms produced by either angiotensin II (AngII) infusion in Apoe -/- and Ldlr -/- mice or intraluminal elastase incubation in wildtype C57BL/6J mice were examined. Aortas were dissected free and separated into eight anatomical segments for proteomics in comparison to their appropriate controls. High-dimensional proteome cluster analyses identified site-specific protein signatures in the suprarenal segment for AngII-infused mice (159 for Apoe -/- and 158 for Ldlr -/-) and the infrarenal segment for elastase-incubated mice (173). Network analysis revealed a predominance of inflammatory and coagulation factors in developing aneurysms, and a predominance of fibrosis-related pathways in established aneurysms for both models. To further substantiate our discovery platform, proteomics was performed on human infrarenal aortic aneurysm tissues as well as aortic tissue collected from age-matched controls. Protein processing and inflammatory pathways, particularly neutrophil-associated inflammation, dominated the proteome of the human aneurysm abdominal tissue. Aneurysmal tissue from both mouse and human had inflammation, coagulation, and protein processing signatures, but differed in the prevalence of neutrophil-associated pathways, and erythrocyte and oxidative stress-dominated networks in the human aneurysms. Conclusions Identifying changes unique to each mouse model will help to contextualize model-specific findings. Focusing on shared proteins between mouse experimental models or between mouse and human tissues may help to better understand the mechanisms for AAA and establish molecular bases for novel therapies.
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Affiliation(s)
- Stephanie Morgan
- Cardiovascular Division, Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
| | - Lang Ho Lee
- Cardiovascular Division, Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
| | - Arda Halu
- Cardiovascular Division, Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
| | - Jessica S. Nicolau
- Cardiovascular Division, Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
| | - Hideyuki Higashi
- Cardiovascular Division, Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
| | - Anna H. Ha
- Cardiovascular Division, Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
| | - Jennifer R. Wen
- Cardiovascular Division, Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
| | - Alan Daugherty
- Department of Physiology, Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, United States
| | - Peter Libby
- Center for Excellence in Vascular Biology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
| | - Scott J. Cameron
- Department of Cardiovascular Medicine, Section of Vascular Medicine, Heart Vascular and Thoracic Institute, Cleveland Clinic Foundation, Cleveland, OH, United States
| | - Doran Mix
- Division of Vascular Surgery, Department of Surgery, University of Rochester School of Medicine, Rochester, NY, United States
| | - Elena Aikawa
- Cardiovascular Division, Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
- Center for Excellence in Vascular Biology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
| | - A. Phillip Owens
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Sasha A. Singh
- Cardiovascular Division, Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
| | - Masanori Aikawa
- Cardiovascular Division, Center for Interdisciplinary Cardiovascular Sciences, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
- Center for Excellence in Vascular Biology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
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16
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Sepponen K, Lundin K, Yohannes DA, Vuoristo S, Balboa D, Poutanen M, Ohlsson C, Hustad S, Bifulco E, Paloviita P, Otonkoski T, Ritvos O, Sainio K, Tapanainen JS, Tuuri T. Steroidogenic factor 1 (NR5A1) induces multiple transcriptional changes during differentiation of human gonadal-like cells. Differentiation 2022; 128:83-100. [DOI: 10.1016/j.diff.2022.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 08/14/2022] [Accepted: 08/14/2022] [Indexed: 11/03/2022]
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17
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Jeong S, Kim B, Byun DJ, Jin S, Seo BS, Shin MH, Leem AY, Choung JJ, Park MS, Hyun YM. Lysophosphatidylcholine Alleviates Acute Lung Injury by Regulating Neutrophil Motility and Neutrophil Extracellular Trap Formation. Front Cell Dev Biol 2022; 10:941914. [PMID: 35859904 PMCID: PMC9289271 DOI: 10.3389/fcell.2022.941914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 06/14/2022] [Indexed: 11/28/2022] Open
Abstract
Sepsis is predominantly initiated by bacterial infection and can cause systemic inflammation, which frequently leads to rapid death of the patient. However, this acute systemic inflammatory response requires further investigation from the perspectives of clinical judgment criteria and early treatment strategies for the relief of symptoms. Lysophosphatidylcholine (LPC) 18:0 may relieve septic symptoms, but the relevant mechanism is not clearly understood. Therefore, we aimed to assess the effectiveness of LPC as a therapeutic treatment for acute inflammation in the lung induced by lipopolysaccharide in mice. Systemic inflammation of mice was induced by lipopolysaccharide (LPS) inoculation to investigate the role of LPC in the migration and the immune response of neutrophils during acute lung injury. By employing two-photon intravital imaging of the LPS-stimulated LysM-GFP mice and other in vitro and in vivo assays, we examined whether LPC alleviates the inflammatory effect of sepsis. We also tested the effect of LPC to human neutrophils from healthy control and sepsis patients. Our data showed that LPC treatment reduced the infiltration of innate immune cells into the lung. Specifically, LPC altered neutrophil migratory patterns and enhanced phagocytic efficacy in the damaged lung. Moreover, LPC treatment reduced the release of neutrophil extracellular trap (NET), which can damage tissue in the inflamed organ and exacerbate disease. It also reduced human neutrophil migration under inflammatory environment. Our results suggest that LPC can alleviate sepsis-induced lung inflammation by regulating the function of neutrophils. These findings provide evidence for the beneficial application of LPC treatment as a potential therapeutic strategy for sepsis.
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Affiliation(s)
- Soi Jeong
- Department of Anatomy, Yonsei University College of Medicine, Seoul, South Korea
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - Bora Kim
- Department of Anatomy, Yonsei University College of Medicine, Seoul, South Korea
| | - Da Jeong Byun
- Department of Anatomy, Yonsei University College of Medicine, Seoul, South Korea
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - Sunmin Jin
- R&D Center, AriBio Co., Ltd., Sengnam, South Korea
| | - Bo Seung Seo
- R&D Center, AriBio Co., Ltd., Sengnam, South Korea
| | - Mi Hwa Shin
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | - Ah Young Leem
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | | | - Moo Suk Park
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea
- *Correspondence: Moo Suk Park, ; Young-Min Hyun,
| | - Young-Min Hyun
- Department of Anatomy, Yonsei University College of Medicine, Seoul, South Korea
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea
- *Correspondence: Moo Suk Park, ; Young-Min Hyun,
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18
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Su W, Liang L, Zhou L, Cao Y, Zhou X, Liu S, Wang Q, Zhang H. Macrophage Paired Immunoglobulin-Like Receptor B Deficiency Promotes Peripheral Atherosclerosis in Apolipoprotein E–Deficient Mice. Front Cell Dev Biol 2022; 9:783954. [PMID: 35321392 PMCID: PMC8936951 DOI: 10.3389/fcell.2021.783954] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 12/13/2021] [Indexed: 01/08/2023] Open
Abstract
Background: Peripheral atherosclerotic disease (PAD) is the narrowing or blockage of arteries that supply blood to the lower limbs. Given its complex nature, bioinformatics can help identify crucial genes involved in the progression of peripheral atherosclerosis. Materials and Methods: Raw human gene expression data for 462 PAD arterial plaque and 23 normal arterial samples were obtained from the GEO database. The data was analyzed using an integrated, multi-layer approach involving differentially-expressed gene analysis, KEGG pathway analysis, GO term enrichment analysis, weighted gene correlation network analysis, and protein-protein interaction analysis. The monocyte/macrophage-expressed leukocyte immunoglobulin-like receptor B2 (LILRB2) was strongly associated with the human PAD phenotype. To explore the role of the murine LILRB2 homologue PirB in vivo, we created a myeloid-specific PirB-knockout Apoe−/− murine model of PAD (PirBMΦKO) to analyze femoral atherosclerotic burden, plaque features of vulnerability, and monocyte recruitment to femoral atherosclerotic lesions. The phenotypes of PirBMΦKO macrophages under various stimuli were also investigated in vitro. Results:PirBMΦKO mice displayed increased femoral atherogenesis, a more vulnerable plaque phenotype, and enhanced monocyte recruitment into lesions. PirBMΦKO macrophages showed enhanced pro-inflammatory responses and a shift toward M1 over M2 polarization under interferon-γ and oxidized LDL exposure. PirBMΦKO macrophages also displayed enhanced efferocytosis and reduced lipid efflux under lipid exposure. Conclusion: Macrophage PirB reduces peripheral atherosclerotic burden, stabilizes peripheral plaque composition, and suppresses macrophage accumulation in peripheral lesions. Macrophage PirB inhibits pro-inflammatory activation, inhibits efferocytosis, and promotes lipid efflux, characteristics critical to suppressing peripheral atherogenesis.
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Affiliation(s)
- Wenhua Su
- Department of Cardiology, First People’s Hospital of Yunnan Province, Kunming, China
- Faculty of Life Science and Biotechnology, Kunming University of Science and Technology, Kunming, China
| | - Liwen Liang
- Department of Cardiology, First People’s Hospital of Yunnan Province, Kunming, China
| | - Liang Zhou
- Department of Cardiology, First People’s Hospital of Yunnan Province, Kunming, China
| | - Yu Cao
- Department of Cardiology, First People’s Hospital of Yunnan Province, Kunming, China
- Department of Cardiovascular Surgery, First People’s Hospital of Yunnan Province, Kunming, China
| | - Xiuli Zhou
- Department of Cardiology, First People’s Hospital of Yunnan Province, Kunming, China
| | - Shiqi Liu
- Department of Cardiology, First People’s Hospital of Yunnan Province, Kunming, China
| | - Qian Wang
- Department of Cardiology, First People’s Hospital of Yunnan Province, Kunming, China
| | - Hong Zhang
- Department of Cardiology, First People’s Hospital of Yunnan Province, Kunming, China
- *Correspondence: Hong Zhang,
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19
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Banik SK, Baishya S, Das Talukdar A, Choudhury MD. Network analysis of atherosclerotic genes elucidates druggable targets. BMC Med Genomics 2022; 15:42. [PMID: 35241081 PMCID: PMC8893053 DOI: 10.1186/s12920-022-01195-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 08/18/2021] [Indexed: 11/22/2022] Open
Abstract
Background Atherosclerosis is one of the major causes of cardiovascular disease. It is characterized by the accumulation of atherosclerotic plaque in arteries under the influence of inflammatory responses, proliferation of smooth muscle cell, accumulation of modified low density lipoprotein. The pathophysiology of atherosclerosis involves the interplay of a number of genes and metabolic pathways. In traditional translation method, only a limited number of genes and pathways can be studied at once. However, the new paradigm of network medicine can be explored to study the interaction of a large array of genes and their functional partners and their connections with the concerned disease pathogenesis. Thus, in our study we employed a branch of network medicine, gene network analysis as a tool to identify the most crucial genes and the miRNAs that regulate these genes at the post transcriptional level responsible for pathogenesis of atherosclerosis. Result From NCBI database 988 atherosclerotic genes were retrieved. The protein–protein interaction using STRING database resulted in 22,693 PPI interactions among 872 nodes (genes) at different confidence score. The cluster analysis of the 872 genes using MCODE, a plug-in of Cytoscape software revealed a total of 18 clusters, the topological parameter and gene ontology analysis facilitated in the selection of four influential genes viz., AGT, LPL, ITGB2, IRS1 from cluster 3. Further, the miRNAs (miR-26, miR-27, and miR-29 families) targeting these genes were obtained by employing MIENTURNET webtool. Conclusion Gene network analysis assisted in filtering out the 4 probable influential genes and 3 miRNA families in the pathogenesis of atherosclerosis. These genes, miRNAs can be targeted to restrict the occurrence of atherosclerosis. Given the importance of atherosclerosis, any approach in the understanding the genes involved in its pathogenesis can substantially enhance the health care system. Supplementary Information The online version contains supplementary material available at 10.1186/s12920-022-01195-y.
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Affiliation(s)
- Sheuli Kangsa Banik
- Department of Life Science and Bioinformatics, Assam University, Silchar, India
| | - Somorita Baishya
- Department of Life Science and Bioinformatics, Assam University, Silchar, India
| | - Anupam Das Talukdar
- Department of Life Science and Bioinformatics, Assam University, Silchar, India
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20
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Li G, Sun J, Zhang J, Lv Y, Liu D, Zhu X, Qi L, Chen Z, Ye Z, Su X, Li L. Identification of Inflammation-Related Biomarkers in Diabetes of the Exocrine Pancreas With the Use of Weighted Gene Co-Expression Network Analysis. Front Endocrinol (Lausanne) 2022; 13:839865. [PMID: 35498402 PMCID: PMC9046596 DOI: 10.3389/fendo.2022.839865] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 03/15/2022] [Indexed: 12/12/2022] Open
Abstract
Diabetes of the exocrine pancreas (DEP), also commonly described as pancreatogenic diabetes mellitus, is a type of diabetes secondary to abnormalities in pancreatic or exocrine secretion of the pancreas. However, its pathogenesis is not yet known. The aim of this article was to explore the biomarkers of DEP and their potential molecular mechanisms. Based on GSE76896 dataset, which was acquired from Gene Expression Omnibus (GEO), we identified 373 genes by weighted gene co-expression network analysis (WGCNA) and differential expression analysis. In addition, protein-protein interaction (PPI) network analysis and cytoHubba were used to screen potential hub genes. Five hub genes were determined, comprising Toll-like receptor 4 (TLR4), ITGAM, ITGB2, PTPRC, and CSF1R. Gene Ontology (GO) analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways suggested macrophage activation and Toll-like receptor signaling pathway as important pathophysiological features of DEP. CIBERSORT suggested that TLR4 may regulate the immune pathway via macrophages. Next, we validated the expression and receiver operating characteristic curve (ROC) of the hub genes using the GSE164416 dataset. In addition, we used miRNet to predict the target miRNAs of hub genes and intersected them with common miRNAs in diabetes from the Human MicroRNA Disease Database (HMDD), which was used to propose a possible mechanistic model for DEP. The miRNA-mRNA network showed that has-miR-155-5p/has-miR-27a-3p/has-miR-21-5p-TLR4 might lead to TLR4 signaling pathway activation in DEP. In conclusion, we identified five hub genes, namely, TLR4, ITGAM, ITGB2, PTPRC, and CSF1R, as biomarkers to aid in the diagnosis of DEP and conducted an in-depth study of the pathogenesis of DEP at the genetic level.
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Affiliation(s)
- Guoqing Li
- Department of Endocrinology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Jinfang Sun
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Jun Zhang
- Department of Endocrinology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Yingqi Lv
- Department of Endocrinology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Dechen Liu
- Department of Endocrinology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
- Institute of Glucose and Lipid Metabolism, Southeast University, Nanjing, China
- Department of Clinical Science and Research, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Xiangyun Zhu
- Department of Endocrinology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Liang Qi
- Department of Endocrinology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Zhiwei Chen
- Department of Endocrinology, Hunan Provincial People’s Hospital, First Affiliated Hospital of Hunan Normal University, Hunan, China
| | - Zheng Ye
- Department of Endocrinology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Xianghui Su
- Department of Endocrinology, Changji Branch, First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China
- *Correspondence: Xianghui Su, ; Ling Li,
| | - Ling Li
- Department of Endocrinology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
- Institute of Glucose and Lipid Metabolism, Southeast University, Nanjing, China
- *Correspondence: Xianghui Su, ; Ling Li,
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21
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Casteel JL, Keever KR, Ardell CL, Williams DL, Gao D, Podrez EA, Byzova TV, Yakubenko VP. Modification of Extracellular Matrix by the Product of DHA Oxidation Switches Macrophage Adhesion Patterns and Promotes Retention of Macrophages During Chronic Inflammation. Front Immunol 2022; 13:867082. [PMID: 35720381 PMCID: PMC9204313 DOI: 10.3389/fimmu.2022.867082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 04/27/2022] [Indexed: 11/13/2022] Open
Abstract
Oxidation of polyunsaturated fatty acids contributes to different aspects of the inflammatory response due to the variety of products generated. Specifically, the oxidation of DHA produces the end-product, carboxyethylpyrrole (CEP), which forms a covalent adduct with proteins via an ϵ-amino group of lysines. Previously, we found that CEP formation is dramatically increased in inflamed tissue and CEP-modified albumin and fibrinogen became ligands for αDβ2 (CD11d/CD18) and αMβ2 (CD11b/CD18) integrins. In this study, we evaluated the effect of extracellular matrix (ECM) modification with CEP on the adhesive properties of M1-polarized macrophages, particularly during chronic inflammation. Using digested atherosclerotic lesions and in vitro oxidation assays, we demonstrated the ability of ECM proteins to form adducts with CEP, particularly, DHA oxidation leads to the formation of CEP adducts with collagen IV and laminin, but not with collagen I. Using integrin αDβ2-transfected HEK293 cells, WT and αD-/- mouse M1-polarized macrophages, we revealed that CEP-modified proteins support stronger cell adhesion and spreading when compared with natural ECM ligands such as collagen IV, laminin, and fibrinogen. Integrin αDβ2 is critical for M1 macrophage adhesion to CEP. Based on biolayer interferometry results, the isolated αD I-domain demonstrates markedly higher binding affinity to CEP compared to the "natural" αDβ2 ligand fibrinogen. Finally, the presence of CEP-modified proteins in a 3D fibrin matrix significantly increased M1 macrophage retention. Therefore, CEP modification converts ECM proteins to αDβ2-recognition ligands by changing a positively charged lysine to negatively charged CEP, which increases M1 macrophage adhesion to ECM and promotes macrophage retention during detrimental inflammation, autoimmunity, and chronic inflammation.
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Affiliation(s)
- Jared L Casteel
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Kasey R Keever
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States.,Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Christopher L Ardell
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - David L Williams
- Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States.,Department of Surgery, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Detao Gao
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
| | - Eugene A Podrez
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
| | - Tatiana V Byzova
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
| | - Valentin P Yakubenko
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States.,Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
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22
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Blythe EN, Weaver LC, Brown A, Dekaban GA. β2 Integrin CD11d/CD18: From Expression to an Emerging Role in Staged Leukocyte Migration. Front Immunol 2021; 12:775447. [PMID: 34858434 PMCID: PMC8630586 DOI: 10.3389/fimmu.2021.775447] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 10/08/2021] [Indexed: 12/12/2022] Open
Abstract
CD11d/CD18 is the most recently discovered and least understood β2 integrin. Known CD11d adhesive mechanisms contribute to both extravasation and mesenchymal migration – two key aspects for localizing peripheral leukocytes to sites of inflammation. Differential expression of CD11d induces differences in monocyte/macrophage mesenchymal migration including impacts on macrophage sub-set migration. The participation of CD11d/CD18 in leukocyte localization during atherosclerosis and following neurotrauma has sparked interest in the development of CD11d-targeted therapeutic agents. Whereas the adhesive properties of CD11d have undergone investigation, the signalling pathways induced by ligand binding remain largely undefined. Underlining each adhesive and signalling function, CD11d is under unique transcriptional control and expressed on a sub-set of predominately tissue-differentiated innate leukocytes. The following review is the first to capture the nearly three decades of CD11d research and discusses the emerging role of CD11d in leukocyte migration and retention during the progression of a staged immune response.
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Affiliation(s)
- Eoin N Blythe
- Molecular Medicine Research Laboratories, Robarts Research Institute, University of Western Ontario, London, ON, Canada.,Department of Microbiology and Immunology, University of Western Ontario, London, ON, Canada
| | - Lynne C Weaver
- Molecular Medicine Research Laboratories, Robarts Research Institute, University of Western Ontario, London, ON, Canada.,Department of Physiology and Pharmacology, University of Western Ontario, London, ON, Canada
| | - Arthur Brown
- Molecular Medicine Research Laboratories, Robarts Research Institute, University of Western Ontario, London, ON, Canada.,Department of Anatomy and Cell Biology, University of Western Ontario, London, ON, Canada
| | - Gregory A Dekaban
- Molecular Medicine Research Laboratories, Robarts Research Institute, University of Western Ontario, London, ON, Canada.,Department of Microbiology and Immunology, University of Western Ontario, London, ON, Canada
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23
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Li XY, Qin T, Zhang PF, Yan WJ, Lei LL, Kuang JY, Li HD, Zhang WC, Lu XT, Sun YY. Weak UVB Irradiation Promotes Macrophage M2 Polarization and Stabilizes Atherosclerosis. J Cardiovasc Transl Res 2021; 15:855-864. [PMID: 34811697 PMCID: PMC9622510 DOI: 10.1007/s12265-021-10189-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 11/11/2021] [Indexed: 11/23/2022]
Abstract
Atherosclerosis (AS) is a chronic cardiovascular disease endangering human health and is one of the most common causes of myocardial infarction and stroke. Macrophage polarization plays a vital role in regulating plaque stability. As an important component of sunlight, ultraviolet B (UVB) has been proven to promote vitamin D and nitric oxide synthesis. This research used an AS model in ApoE−/− mice to study the effects of UVB on macrophage polarization and atherosclerotic plaque stability. In vitro, UVB irradiation increased arginase-I (Arg-I, M2 macrophage) and macrophage mannose receptor (CD206) expression, while the expression of inducible nitric oxide synthase (iNOS) (M1 macrophage) and CD86 was decreased. UVB promoted Akt phosphorylation in vitro. In vivo, UVB irradiation promoted the stabilization of atherosclerotic lesion plaques, while the phenotype of M2 macrophages increased. Our research provides new evidence for UVB in preventing and treating atherosclerosis.
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Affiliation(s)
- Xin-Yun Li
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Tao Qin
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Emergency Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Peng-Fei Zhang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Wen-Jiang Yan
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Ling-Li Lei
- Grade 2018, School of Basic Medical Sciences, Clinical Medicine (5+3), Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jiang-Ying Kuang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Cardiology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Hao-Dong Li
- Grade 2018, School of Basic Medical Sciences, Clinical Medicine (5+3), Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Wen-Cheng Zhang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xiao-Ting Lu
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yuan-Yuan Sun
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.
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24
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Okreglicka K, Iten I, Pohlmeier L, Onder L, Feng Q, Kurrer M, Ludewig B, Nielsen P, Schneider C, Kopf M. PPARγ is essential for the development of bone marrow erythroblastic island macrophages and splenic red pulp macrophages. J Exp Med 2021; 218:e20191314. [PMID: 33765133 PMCID: PMC8006858 DOI: 10.1084/jem.20191314] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 12/09/2020] [Accepted: 02/22/2021] [Indexed: 12/13/2022] Open
Abstract
Tissue-resident macrophages play a crucial role in maintaining homeostasis. Macrophage progenitors migrate to tissues perinatally, where environmental cues shape their identity and unique functions. Here, we show that the absence of PPARγ affects neonatal development and VCAM-1 expression of splenic iron-recycling red pulp macrophages (RPMs) and bone marrow erythroblastic island macrophages (EIMs). Transcriptome analysis of the few remaining Pparg-deficient RPM-like and EIM-like cells suggests that PPARγ is required for RPM and EIM identity, cell cycling, migration, and localization, but not function in mature RPMs. Notably, Spi-C, another transcription factor implicated in RPM development, was not essential for neonatal expansion of RPMs, even though the transcriptome of Spic-deficient RPMs was strongly affected and indicated a loss of identity. Similarities shared by Pparg- and Spic-deficient RPM-like cells allowed us to identify pathways that rely on both factors. PPARγ and Spi-C collaborate in inducing transcriptional changes, including VCAM-1 and integrin αD expression, which could be required for progenitor retention in the tissue, allowing access to niche-related signals that finalize differentiation.
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Affiliation(s)
- Katarzyna Okreglicka
- Institute of Molecular Health Sciences, Swiss Federal Institute of Technology, Zurich, Switzerland
| | - Irina Iten
- Institute of Molecular Health Sciences, Swiss Federal Institute of Technology, Zurich, Switzerland
| | - Lea Pohlmeier
- Institute of Molecular Health Sciences, Swiss Federal Institute of Technology, Zurich, Switzerland
| | - Lucas Onder
- Institute of Immunobiology, Cantonal Hospital, St. Gallen, Switzerland
| | - Qian Feng
- Institute of Molecular Health Sciences, Swiss Federal Institute of Technology, Zurich, Switzerland
| | | | - Burkhard Ludewig
- Institute of Immunobiology, Cantonal Hospital, St. Gallen, Switzerland
| | - Peter Nielsen
- Institute of Molecular Health Sciences, Swiss Federal Institute of Technology, Zurich, Switzerland
| | - Christoph Schneider
- Institute of Molecular Health Sciences, Swiss Federal Institute of Technology, Zurich, Switzerland
- Institute of Physiology, University of Zurich, Zurich, Switzerland
| | - Manfred Kopf
- Institute of Molecular Health Sciences, Swiss Federal Institute of Technology, Zurich, Switzerland
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25
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Bailey WP, Cui K, Ardell CL, Keever KR, Singh S, Rodriguez-Gil DJ, Ozment TR, Williams DL, Yakubenko VP. Frontline Science: The expression of integrin α D β 2 (CD11d/CD18) on neutrophils orchestrates the defense mechanism against endotoxemia and sepsis. J Leukoc Biol 2021; 109:877-890. [PMID: 33438263 PMCID: PMC8085079 DOI: 10.1002/jlb.3hi0820-529rr] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 12/07/2020] [Accepted: 12/08/2020] [Indexed: 12/14/2022] Open
Abstract
Neutrophil-macrophage interplay is a fine-tuning mechanism that regulates the innate immune response during infection and inflammation. Cell surface receptors play an essential role in neutrophil and macrophage functions. The same receptor can provide different outcomes within diverse leukocyte subsets in different inflammatory conditions. Understanding the variety of responses mediated by one receptor is critical for the development of anti-inflammatory treatments. In this study, we evaluated the role of a leukocyte adhesive receptor, integrin αD β2 , in the development of acute inflammation. αD β2 is mostly expressed on macrophages and contributes to the development of chronic inflammation. In contrast, we found that αD -knockout dramatically increases mortality in the cecal ligation and puncture sepsis model and LPS-induced endotoxemia. This pathologic outcome of αD -deficient mice is associated with a reduced number of monocyte-derived macrophages and an increased number of neutrophils in their lungs. However, the tracking of adoptively transferred fluorescently labeled wild-type (WT) and αD-/- monocytes in WT mice during endotoxemia demonstrated only a moderate difference between the recruitment of these two subsets. Moreover, the rescue experiment, using i.v. injection of WT monocytes to αD -deficient mice followed by LPS challenge, showed only slightly reduced mortality. Surprisingly, the injection of WT neutrophils to the bloodstream of αD-/- mice markedly increased migration of monocyte-derived macrophage to lungs and dramatically improves survival. αD -deficient neutrophils demonstrate increased necrosis/pyroptosis. αD β2 -mediated macrophage accumulation in the lungs promotes efferocytosis that reduced mortality. Hence, integrin αD β2 implements a complex defense mechanism during endotoxemia, which is mediated by macrophages via a neutrophil-dependent pathway.
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Affiliation(s)
- William P Bailey
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
| | - Kui Cui
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
| | - Christopher L Ardell
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
| | - Kasey R Keever
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
| | - Sanjay Singh
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
| | - Diego J Rodriguez-Gil
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
| | - Tammy R Ozment
- Department of Surgery, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
- Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
| | - David L Williams
- Department of Surgery, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
- Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
| | - Valentin P Yakubenko
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
- Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
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26
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Sun H, Zhi K, Hu L, Fan Z. The Activation and Regulation of β2 Integrins in Phagocytes and Phagocytosis. Front Immunol 2021; 12:633639. [PMID: 33868253 PMCID: PMC8044391 DOI: 10.3389/fimmu.2021.633639] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 03/11/2021] [Indexed: 01/10/2023] Open
Abstract
Phagocytes, which include neutrophils, monocytes, macrophages, and dendritic cells, protect the body by removing foreign particles, bacteria, and dead or dying cells. Phagocytic integrins are greatly involved in the recognition of and adhesion to specific antigens on cells and pathogens during phagocytosis as well as the recruitment of immune cells. β2 integrins, including αLβ2, αMβ2, αXβ2, and αDβ2, are the major integrins presented on the phagocyte surface. The activation of β2 integrins is essential to the recruitment and phagocytic function of these phagocytes and is critical for the regulation of inflammation and immune defense. However, aberrant activation of β2 integrins aggravates auto-immune diseases, such as psoriasis, arthritis, and multiple sclerosis, and facilitates tumor metastasis, making them double-edged swords as candidates for therapeutic intervention. Therefore, precise regulation of phagocyte activities by targeting β2 integrins should promote their host defense functions with minimal side effects on other cells. Here, we reviewed advances in the regulatory mechanisms underlying β2 integrin inside-out signaling, as well as the roles of β2 integrin activation in phagocyte functions.
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Affiliation(s)
- Hao Sun
- Department of Medicine, University of California, San Diego, La Jolla, CA, United States
| | - Kangkang Zhi
- Department of Vascular Surgery, Changzheng Hospital, Shanghai, China
| | - Liang Hu
- Department of Cardiology, Cardiovascular Institute of Zhengzhou University, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhichao Fan
- Department of Immunology, School of Medicine, UConn Health, Farmington, CT, United States
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27
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Zhou M, Wang X, Shi Y, Ding Y, Li X, Xie T, Shi Z, Fu W. Deficiency of ITGAM Attenuates Experimental Abdominal Aortic Aneurysm in Mice. J Am Heart Assoc 2021; 10:e019900. [PMID: 33749307 PMCID: PMC8174368 DOI: 10.1161/jaha.120.019900] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Background Integrin αM (CD11b), which is encoded by the Integrin Subunit Alpha M (ITGAM) gene, is not only a surface marker of monocytes but also an essential adhesion molecule. In this study, we investigated the effect of CD11b on experimental abdominal aortic aneurysm and the potential underlying mechanisms. Methods and Results The incidence of abdominal aortic aneurysm was not significantly lower in ITGAM(‐/‐) mice than in control mice. Nevertheless, knockout of CD11b reduced the maximum abdominal aortic diameter, macrophage infiltration, matrix metalloproteinase‐9 expression, and elastin and collagen degradation. Additionally, lower expression of IL‐6 was found in both the peripheral blood and abdominal aortas of ITGAM(‐/‐) mice, indicating a biological correlation between CD11b and the inflammatory response in abdominal aortic aneurysm. In vitro, the number of ITGAM(‐/‐) bone marrow–derived macrophages (BMDMs) that adhered to endothelial cells was significantly lower than the number of wild‐type BMDMs. Moreover, the CD11b monoclonal antibody and CD11b agonist leukadherin‐1 decreased and increased the number of adherent wild‐type BMDMs, respectively. Through RNA sequencing, genes associated with leukocyte transendothelial migration were found to be downregulated in ITGAM(‐/‐) BMDMs. Furthermore, immunoprecipitation–mass spectrometry analysis predicted that the Akt pathway might be responsible for the impaired transmigratory ability of ITGAM(‐/‐) BMDMs. The reduced activation of Akt was then confirmed, and the Akt agonist SC79 partially rescued the transendothelial migratory function of ITGAM(‐/‐) BMDMs. Conclusions CD11b might promote the development and progression of abdominal aortic aneurysm by mediating the endothelial cells adhesion and transendothelial migration of circulating monocytes/macrophages.
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Affiliation(s)
- Min Zhou
- Department of Vascular Surgery Zhongshan Hospital Fudan University Shanghai China
| | - Xia Wang
- Department of Ultrasound in Medicine Shanghai Jiao Tong University Affiliated Sixth People's Hospital Shanghai China
| | - Yiqin Shi
- Department of Nephrology Zhongshan Hospital Fudan University Shanghai China
| | - Yong Ding
- Department of Vascular Surgery Zhongshan Hospital Fudan University Shanghai China
| | - Xu Li
- Department of Vascular Surgery Zhongshan Hospital Fudan University Shanghai China
| | - Tianchen Xie
- Department of Vascular Surgery Zhongshan Hospital Fudan University Shanghai China
| | - Zhenyu Shi
- Department of Vascular Surgery Zhongshan Hospital Fudan University Shanghai China
| | - Weiguo Fu
- Department of Vascular Surgery Zhongshan Hospital Fudan University Shanghai China
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28
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Chen H, Du J, Zhang S, Tong H, Zhang M. Ghrelin suppresses migration of macrophages via inhibition of ROCK2 under chronic intermittent hypoxia. J Int Med Res 2021; 48:300060520926065. [PMID: 32485129 PMCID: PMC7273871 DOI: 10.1177/0300060520926065] [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] [Indexed: 01/13/2023] Open
Abstract
Objectives Migration of macrophages and atherosclerosis result in various
diseases, including coronary heart disease. This study aimed to
clarify the roles that ghrelin and Rho-associated
coiled-coil-containing protein kinase 2 (ROCK2) play in
migration of macrophages under chronic intermittent hypoxia
(CIH). Methods A rat model of CIH was constructed and changes in ghrelin and ROCK2
protein expression were measured by western blot assay. The
migratory ability of macrophages was determined by the transwell
assay. Hematoxylin and eosin staining was applied to detect the
changes in intima-media thickness. Results We found that CIH enhanced migration of macrophages, and this
effect was attenuated by exogenous ghrelin. Additionally, the
facilitative effect of CIH on migration of macrophages was
strengthened or decreased by upregulation or downregulation of
ROCK2, respectively. This phenomenon indicated that ROCK2 was
involved in CIH-induced migration in macrophages. Furthermore,
western blot and transwell assays showed that ghrelin inhibited
CIH-induced migration via ROCK2 suppression in macrophages. Conclusions In summary, the present study shows that ghrelin inhibits
CIH-induced migration via ROCK2 suppression in macrophages. Our
research may help lead to identifying a new molecular mechanism
for targeted therapy of atherosclerosis and its associated
coronary artery diseases under intermittent hypoxia.
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Affiliation(s)
- Hong Chen
- Central Hospital Affiliated to Shenyang Medical College, Shenyang, Liaoning, China
| | - Jianfeng Du
- Central Hospital Affiliated to Shenyang Medical College, Shenyang, Liaoning, China
| | - Siying Zhang
- Central Hospital Affiliated to Shenyang Medical College, Shenyang, Liaoning, China
| | - Hao Tong
- China Medical University, Shenyang, China
| | - Man Zhang
- Central Hospital Affiliated to Shenyang Medical College, Shenyang, Liaoning, China
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29
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Strunz M, Jarrell JT, Cohen DS, Rosin ER, Vanderburg CR, Huang X. Modulation of SPARC/Hevin Proteins in Alzheimer's Disease Brain Injury. J Alzheimers Dis 2020; 68:695-710. [PMID: 30883351 PMCID: PMC6481539 DOI: 10.3233/jad-181032] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Alzheimer’s disease (AD) is an age-related progressive form of dementia that features neuronal loss, intracellular tau, and extracellular amyloid-β (Aβ) protein deposition. Neurodegeneration is accompanied by neuroinflammation mainly involving microglia, the resident innate immune cell population of the brain. During AD progression, microglia shift their phenotype, and it has been suggested that they express matricellular proteins such as secreted protein acidic and rich in cysteine (SPARC) and Hevin protein, which facilitate the migration of other immune cells, such as blood-derived dendritic cells. We have detected both SPARC and Hevin in postmortem AD brain tissues and confirmed significant alterations in transcript expression using real-time qPCR. We suggest that an infiltration of myeloid-derived immune cells occurs in the areas of diseased tissue. SPARC is highly expressed in AD brain and collocates to Aβ protein deposits, thus contributing actively to cerebral inflammation and subsequent tissue repair, and Hevin may be downregulated in the diseased state. However, further research is needed to reveal the exact roles of SPARC and Hevin proteins and associated signaling pathways in AD-related neuroinflammation. Nevertheless, normalizing SPARC/Hevin protein expression such as interdicting heightened SPARC protein expression may confer a novel therapeutic opportunity for modulating AD progression.
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Affiliation(s)
- Maximilian Strunz
- Department of Neurology, Harvard NeuroDiscovery Center, Advanced Tissue Resource Center, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Juliet T Jarrell
- Department of Psychiatry, Neurochemistry Laboratory, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - David S Cohen
- Department of Psychiatry, Neurochemistry Laboratory, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Eric R Rosin
- Department of Psychiatry, Neurochemistry Laboratory, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Charles R Vanderburg
- Department of Neurology, Harvard NeuroDiscovery Center, Advanced Tissue Resource Center, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Xudong Huang
- Department of Psychiatry, Neurochemistry Laboratory, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
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30
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Biology of the human blood-nerve barrier in health and disease. Exp Neurol 2020; 328:113272. [PMID: 32142802 DOI: 10.1016/j.expneurol.2020.113272] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 02/29/2020] [Accepted: 03/02/2020] [Indexed: 12/13/2022]
Abstract
A highly regulated endoneurial microenvironment is required for normal axonal function in peripheral nerves and nerve roots, which structurally consist of an outer collagenous epineurium, inner perineurium consisting of multiple concentric layers of specialized epithelioid myofibroblasts that surround the innermost endoneurium, which consists of myelinated and unmyelinated axons embedded in a looser mesh of collagen fibers. Endoneurial homeostasis is achieved by tight junction-forming endoneurial microvessels that control ion, solute, water, nutrient, macromolecule and leukocyte influx and efflux between the bloodstream and endoneurium, and the innermost layers of the perineurium that control interstitial fluid component flux between the freely permeable epineurium and endoneurium. Strictly speaking, endoneurial microvascular endothelium should be considered the blood-nerve barrier (BNB) due to direct communication with circulating blood. The mammalian BNB is considered the second most restrictive vascular system after the blood-brain barrier (BBB) based on classic in situ permeability studies. Structural alterations in endoneurial microvessels or interactions with hematogenous leukocytes have been described in several human peripheral neuropathies; however major advances in BNB biology in health and disease have been limited over the past 50 years. Guided by transcriptome and proteome studies of normal and pathologic human peripheral nerves, purified primary and immortalized human endoneurial endothelial cells that form the BNB and leukocytes from patients with well-characterized peripheral neuropathies, validated by in situ or ex vivo protein expression studies, data are emerging on the molecular and functional characteristics of the human BNB in health and in specific peripheral neuropathies, as well as chronic neuropathic pain. These early advancements have the potential to not only increase our understanding of how the BNB works and adapts or fails to adapt to varying insult, but provide insights relevant to pathogenic leukocyte trafficking, with translational potential and specific therapeutic application for chronic peripheral neuropathies and neuropathic pain.
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31
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Bednarczyk M, Stege H, Grabbe S, Bros M. β2 Integrins-Multi-Functional Leukocyte Receptors in Health and Disease. Int J Mol Sci 2020; 21:E1402. [PMID: 32092981 PMCID: PMC7073085 DOI: 10.3390/ijms21041402] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 02/11/2020] [Accepted: 02/14/2020] [Indexed: 12/25/2022] Open
Abstract
β2 integrins are heterodimeric surface receptors composed of a variable α (CD11a-CD11d) and a constant β (CD18) subunit and are specifically expressed by leukocytes. The α subunit defines the individual functional properties of the corresponding β2 integrin, but all β2 integrins show functional overlap. They mediate adhesion to other cells and to components of the extracellular matrix (ECM), orchestrate uptake of extracellular material like complement-opsonized pathogens, control cytoskeletal organization, and modulate cell signaling. This review aims to delineate the tremendous role of β2 integrins for immune functions as exemplified by the phenotype of LAD-I (leukocyte adhesion deficiency 1) patients that suffer from strong recurrent infections. These immune defects have been largely attributed to impaired migratory and phagocytic properties of polymorphonuclear granulocytes. The molecular base for this inherited disease is a functional impairment of β2 integrins due to mutations within the CD18 gene. LAD-I patients are also predisposed for autoimmune diseases. In agreement, polymorphisms within the CD11b gene have been associated with autoimmunity. Consequently, β2 integrins have received growing interest as targets in the treatment of autoimmune diseases. Moreover, β2 integrin activity on leukocytes has been implicated in tumor development.
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Affiliation(s)
| | | | | | - Matthias Bros
- Department of Dermatology, University Medical Center Mainz, Langenbeckstraße 1, 55131 Mainz, Germany; (M.B.); (H.S.); (S.G.)
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32
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BALLANTYNE CHRISTIEM. PRECISION MEDICINE FOR CARDIOVASCULAR DISEASE PREVENTION: WHERE DO WE STAND IN 2019 WITH A FOCUS ON INFLAMMATION AND LIPIDS? TRANSACTIONS OF THE AMERICAN CLINICAL AND CLIMATOLOGICAL ASSOCIATION 2020; 131:42-47. [PMID: 32675841 PMCID: PMC7358503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this manuscript, I will discuss where we stand in 2019, with a focus on inflammation and lipids, in regard to precision medicine for cardiovascular disease prevention. This manuscript will reflect my career journey working in the cardiovascular disease field.
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Affiliation(s)
- CHRISTIE M. BALLANTYNE
- Correspondence and reprint requests: Christie M. Ballantyne, MD, Baylor College of Medicine, One Baylor Plaza, MS BCM285, Houston, TX 77030713-798-5034, 713-798-4121
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33
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de Azevedo-Quintanilha IG, Vieira-de-Abreu A, Ferreira AC, Reis PA, Silva TI, Nascimento DDO, Campbell RA, Estato V, Weyrich AS, Bozza PT, Zimmerman GA, Castro-Faria-Neto HC. Integrin αDβ2 influences cerebral edema, leukocyte accumulation and neurologic outcomes in experimental severe malaria. PLoS One 2019; 14:e0224610. [PMID: 31869339 PMCID: PMC6927624 DOI: 10.1371/journal.pone.0224610] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 10/17/2019] [Indexed: 12/30/2022] Open
Abstract
Malaria is an infectious disease of major worldwide clinical importance that causes a variety of severe, or complicated, syndromes including cerebral malaria, which is often fatal. Leukocyte integrins are essential for host defense but also mediate physiologic responses of the innate and adaptive immune systems. We previously showed that targeted deletion of the αD subunit (αD-/-) of the αDβ2 integrin, which is expressed on key leukocyte subsets in mice and humans, leads to absent expression of the integrin heterodimer on murine macrophages and reduces mortality in mice infected with Plasmodium berghei ANKA (P. berghei ANKA). To further identify mechanisms involved in the protective effect of αD deletion in this model of severe malaria we examined wild type C57BL/6 (WT) and αD-/- mice after P. berghei ANKA infection and found that vessel plugging and leukocyte infiltration were significantly decreased in the brains of αD-/- animals. Intravital microscopy demonstrated decreased rolling and adhesion of leukocytes in cerebral vessels of αD-/- mice. Flow cytometry analysis showed decreased T-lymphocyte accumulation in the brains of infected αD-/- animals. Evans blue dye exclusion assays demonstrated significantly less dye extravasation in the brains of αD-/- mice, indicating preserved blood-brain barrier integrity. WT mice that were salvaged from P. berghei ANKA infection by treatment with chloroquine had impaired aversive memory, which was not observed in αD-/- mice. We conclude that deletion of integrin αDβ2 alters the natural course of experimental severe malaria, demonstrating previously unrecognized activities of a key leukocyte integrin in immune-inflammatory responses that mediate cerebral involvement.
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Affiliation(s)
| | - Adriana Vieira-de-Abreu
- Laboratório de Imunofarmacologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Rio de Janeiro, Brazil
| | - André C. Ferreira
- Laboratório de Imunofarmacologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Patricia A. Reis
- Laboratório de Imunofarmacologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Tathiany I. Silva
- Laboratório de Imunofarmacologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Danielle de O. Nascimento
- Laboratório de Imunofarmacologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Robert A. Campbell
- Department of Internal Medicine and Program in Molecular Medicine, University of Utah, Salt Lake City, Utah, United States of America
| | - Vanessa Estato
- Laboratório de Imunofarmacologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Andrew S. Weyrich
- Department of Internal Medicine and Program in Molecular Medicine, University of Utah, Salt Lake City, Utah, United States of America
| | - Patrícia T. Bozza
- Laboratório de Imunofarmacologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Guy A. Zimmerman
- Department of Internal Medicine and Program in Molecular Medicine, University of Utah, Salt Lake City, Utah, United States of America
| | - Hugo C. Castro-Faria-Neto
- Laboratório de Imunofarmacologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Rio de Janeiro, Brazil
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Abstract
Integrins are heterodimeric cell surface receptors ensuring the mechanical connection between cells and the extracellular matrix. In addition to the anchorage of cells to the extracellular matrix, these receptors have critical functions in intracellular signaling, but are also taking center stage in many physiological and pathological conditions. In this review, we provide some historical, structural, and physiological notes so that the diverse functions of these receptors can be appreciated and put into the context of the emerging field of mechanobiology. We propose that the exciting journey of the exploration of these receptors will continue for at least another new generation of researchers.
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Affiliation(s)
- Michael Bachmann
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire , Geneva , Switzerland ; and Faculty of Medicine and Health Technology, Tampere University, and Fimlab Laboratories , Tampere , Finland
| | - Sampo Kukkurainen
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire , Geneva , Switzerland ; and Faculty of Medicine and Health Technology, Tampere University, and Fimlab Laboratories , Tampere , Finland
| | - Vesa P Hytönen
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire , Geneva , Switzerland ; and Faculty of Medicine and Health Technology, Tampere University, and Fimlab Laboratories , Tampere , Finland
| | - Bernhard Wehrle-Haller
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire , Geneva , Switzerland ; and Faculty of Medicine and Health Technology, Tampere University, and Fimlab Laboratories , Tampere , Finland
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Il'in DA, Shkurupy VA. In Vitro Analysis of the Expression of CD11, CD29, CD36, and DC-STAMP Molecules during the Formation of Multinuclear Macrophages in BCG-Infected Mice. Bull Exp Biol Med 2019; 167:653-655. [PMID: 31641985 DOI: 10.1007/s10517-019-04591-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Indexed: 10/25/2022]
Abstract
Expression of CD11, CD29, CD36, and DC-STAMP molecules by macrophages was analyzed in in vitro experiments. These molecules mediate cell fusion, one of the mechanisms underlying the formation of multinuclear macrophages. Macrophages were obtained from intact and BCG-infected male BALB/c mice. In intact cultures, multinuclear macrophages appeared primarily due to amitotic division of cell nuclei, while in macrophage cultures from infected mice, the process of cell fusion predominated. In intact macrophage cultures, bi- and multinuclear cells expressed primarily CD29 and CD36. In cultures from infected mice, macrophages expressing CD29 and DC-STAMP predominated, but bi- and multinuclear macrophages expressing CD11 and CD36 predominated over mononuclear ones. The study of macrophage fusion mechanism can be useful for understanding of this biological phenomenon as the mechanisms of delivery of M. tuberculosis and lysosomotropic anti-tuberculosis drugs into tuberculous granulomas to suppress M. tuberculosis persisting in macrophages and reduce the destructive potential of granulomas.
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Affiliation(s)
- D A Il'in
- Research Institute of Experimental and Clinical Medicine, Federal Research Center of Fundamental and Translational Medicine, Novosibirsk, Russia.
| | - V A Shkurupy
- Research Institute of Experimental and Clinical Medicine, Federal Research Center of Fundamental and Translational Medicine, Novosibirsk, Russia.,Novosibirsk State Medical University, Ministry of Health of the Russian Federation, Novosibirsk, Russia
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36
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Moore KJ, Koplev S, Fisher EA, Tabas I, Björkegren JLM, Doran AC, Kovacic JC. Macrophage Trafficking, Inflammatory Resolution, and Genomics in Atherosclerosis: JACC Macrophage in CVD Series (Part 2). J Am Coll Cardiol 2019; 72:2181-2197. [PMID: 30360827 DOI: 10.1016/j.jacc.2018.08.2147] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 07/13/2018] [Accepted: 08/03/2018] [Indexed: 12/31/2022]
Abstract
Atherosclerosis is characterized by the retention of modified lipoproteins in the arterial wall. These modified lipoproteins activate resident macrophages and the recruitment of monocyte-derived cells, which differentiate into mononuclear phagocytes that ingest the deposited lipoproteins to become "foam cells": a hallmark of this disease. In this Part 2 of a 4-part review series covering the macrophage in cardiovascular disease, we critically review the contributions and relevant pathobiology of monocytes, macrophages, and foam cells as relevant to atherosclerosis. We also review evidence that via various pathways, a failure of the resolution of inflammation is an additional key aspect of this disease process. Finally, we consider the likely role played by genomics and biological networks in controlling the macrophage phenotype in atherosclerosis. Collectively, these data provide substantial insights on the atherosclerotic process, while concurrently offering numerous molecular and genomic candidates that appear to hold great promise for selective targeting as clinical therapies.
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Affiliation(s)
- Kathryn J Moore
- Department of Medicine, Leon H. Charney Division of Cardiology, Marc and Ruti Bell Vascular Biology and Disease Program, New York University School of Medicine, New York, New York
| | - Simon Koplev
- Department of Genetics & Genomic Sciences, Institute of Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Edward A Fisher
- Department of Medicine, Leon H. Charney Division of Cardiology, Marc and Ruti Bell Vascular Biology and Disease Program, New York University School of Medicine, New York, New York
| | - Ira Tabas
- Department of Medicine, Columbia University, New York, New York; Department of Pathology and Cell Biology, Columbia University, New York, New York; Department of Physiology, Columbia University, New York, New York
| | - Johan L M Björkegren
- Department of Genetics & Genomic Sciences, Institute of Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, New York; Integrated Cardio Metabolic Centre, Department of Medicine, Karolinska Institutet, Karolinska Universitetssjukhuset, Huddinge, Sweden
| | - Amanda C Doran
- Department of Medicine, Columbia University, New York, New York
| | - Jason C Kovacic
- The Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, New York, New York.
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Cui K, Podolnikova NP, Bailey W, Szmuc E, Podrez EA, Byzova TV, Yakubenko VP. Inhibition of integrin α Dβ 2-mediated macrophage adhesion to end product of docosahexaenoic acid (DHA) oxidation prevents macrophage accumulation during inflammation. J Biol Chem 2019; 294:14370-14382. [PMID: 31395659 DOI: 10.1074/jbc.ra119.009590] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 07/22/2019] [Indexed: 11/06/2022] Open
Abstract
A critical step in the development of chronic inflammatory diseases is the accumulation of proinflammatory macrophages in the extracellular matrix (ECM) of peripheral tissues. The adhesion receptor integrin αDβ2 promotes the development of atherosclerosis and diabetes by supporting macrophage retention in inflamed tissue. We recently found that the end product of docosahexaenoic acid (DHA) oxidation, 2-(ω-carboxyethyl)pyrrole (CEP), serves as a ligand for αDβ2 CEP adduct with ECM is generated during inflammation-mediated lipid peroxidation. The goal of this project was to identify a specific inhibitor for αDβ2-CEP interaction that can prevent macrophage accumulation. Using a specially designed peptide library, Biacore-detected protein-protein interaction, and adhesion of integrin-transfected HEK 293 cells, we identified a sequence (called P5 peptide) that significantly and specifically inhibited αD-CEP binding. In the model of thioglycollate-induced peritoneal inflammation, the injection of cyclic P5 peptide reduced 3-fold the macrophage accumulation in WT mice but had no effect in αD-deficient mice. The tracking of adoptively transferred, fluorescently labeled WT and αD -/- monocytes in the model of peritoneal inflammation and in vitro two-dimensional and three-dimensional migration assays demonstrated that P5 peptide does not affect monocyte transendothelial migration or macrophage efflux from the peritoneal cavity but regulates macrophage migration through the ECM. Moreover, the injection of P5 peptide into WT mice on a high-fat diet prevents macrophage accumulation in adipose tissue in an αDβ2-dependent manner. Taken together, these results demonstrate the importance of αDβ2-mediated macrophage adhesion for the accumulation of infiltrating macrophages in the inflamed ECM and propose P5 peptide as a potential inhibitor of atherogenesis and diabetes.
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Affiliation(s)
- Kui Cui
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee 37614
| | - Nataly P Podolnikova
- Center for Metabolic and Vascular Biology, School of Life Sciences, Arizona State University, Tempe, Arizona 85281
| | - William Bailey
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee 37614
| | - Eric Szmuc
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee 37614
| | - Eugene A Podrez
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44106
| | - Tatiana V Byzova
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44106
| | - Valentin P Yakubenko
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee 37614
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Sakai K, Nagashima S, Wakabayashi T, Tumenbayar B, Hayakawa H, Hayakawa M, Karasawa T, Ohashi K, Yamazaki H, Takei A, Takei S, Yamamuro D, Takahashi M, Yagyu H, Osuga JI, Takahashi M, Tominaga SI, Ishibashi S. Myeloid HMG-CoA (3-Hydroxy-3-Methylglutaryl-Coenzyme A) Reductase Determines Atherosclerosis by Modulating Migration of Macrophages. Arterioscler Thromb Vasc Biol 2019; 38:2590-2600. [PMID: 30354246 DOI: 10.1161/atvbaha.118.311664] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Objective- Inhibition of HMGCR (3-hydroxy-3-methylglutaryl-coenzyme A reductase) is atheroprotective primarily by decreasing plasma LDL (low-density lipoprotein)-cholesterol. However, it is unknown whether inhibition of HMGCR in myeloid cells contributes to this atheroprotection. We sought to determine the role of myeloid HMGCR in the development of atherosclerosis. Approach and Results- We generated mice with genetically reduced Hmgcr in myeloid cells ( Hmgcr m- /m-) using LysM (Cre) and compared various functions of their macrophages to those of Hmgcr fl/fl control mice. We further compared the extent of atherosclerosis in Hmgcr m-/ m- and Hmgcr fl/fl mice in the absence of Ldlr (LDL receptor). Hmgcr m-/ m- macrophages and granulocytes had significantly lower Hmgcr mRNA expression and cholesterol biosynthesis than Hmgcr fl/fl cells. In vitro, Hmgcr m-/ m- monocytes/macrophages had reduced ability to migrate, proliferate, and survive compared with Hmgcr fl/fl monocytes/macrophages. However, there was no difference in ability to adhere, phagocytose, store lipids, or polarize to M1 macrophages between the 2 types of macrophages. The amounts of plasma membrane-associated small GTPase proteins, such as RhoA (RAS homolog family member A), were increased in Hmgcr m-/ m- macrophages. In the setting of Ldlr deficiency, Hmgcr m-/ m- mice developed significantly smaller atherosclerotic lesions than Hmgcr fl/fl mice. However, there were no differences between the 2 types of mice either in plasma lipoprotein profiles or in the numbers of proliferating or apoptotic cells in the lesions in vivo. The in vivo migration of Hmgcr m-/ m- macrophages to the lesions was reduced compared with Hmgcr fl/fl macrophages. Conclusions- Genetic reduction of HMGCR in myeloid cells may exert atheroprotective effects primarily by decreasing the migratory activity of monocytes/macrophages to the lesions.
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Affiliation(s)
- Kent Sakai
- From the Division of Endocrinology and Metabolism, Department of Medicine (K.S., S.N., T.W., B.T., H. Yamazaki, A.T., S.T., D.Y., M.T., H. Yagyu, J.-i.O., S.I.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Shuichi Nagashima
- From the Division of Endocrinology and Metabolism, Department of Medicine (K.S., S.N., T.W., B.T., H. Yamazaki, A.T., S.T., D.Y., M.T., H. Yagyu, J.-i.O., S.I.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Tetsuji Wakabayashi
- From the Division of Endocrinology and Metabolism, Department of Medicine (K.S., S.N., T.W., B.T., H. Yamazaki, A.T., S.T., D.Y., M.T., H. Yagyu, J.-i.O., S.I.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Bayasgalan Tumenbayar
- From the Division of Endocrinology and Metabolism, Department of Medicine (K.S., S.N., T.W., B.T., H. Yamazaki, A.T., S.T., D.Y., M.T., H. Yagyu, J.-i.O., S.I.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Hiroko Hayakawa
- Department of Biochemistry (H.H., M.H., S.-i.T.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Morisada Hayakawa
- Department of Biochemistry (H.H., M.H., S.-i.T.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Tadayoshi Karasawa
- Division of Inflammation Research, Center for Molecular Medicine (T.K., M.T.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Ken Ohashi
- Department of Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Bunkyo ward, Japan (K.O.)
| | - Hisataka Yamazaki
- From the Division of Endocrinology and Metabolism, Department of Medicine (K.S., S.N., T.W., B.T., H. Yamazaki, A.T., S.T., D.Y., M.T., H. Yagyu, J.-i.O., S.I.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Akihito Takei
- From the Division of Endocrinology and Metabolism, Department of Medicine (K.S., S.N., T.W., B.T., H. Yamazaki, A.T., S.T., D.Y., M.T., H. Yagyu, J.-i.O., S.I.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Shoko Takei
- From the Division of Endocrinology and Metabolism, Department of Medicine (K.S., S.N., T.W., B.T., H. Yamazaki, A.T., S.T., D.Y., M.T., H. Yagyu, J.-i.O., S.I.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Daisuke Yamamuro
- From the Division of Endocrinology and Metabolism, Department of Medicine (K.S., S.N., T.W., B.T., H. Yamazaki, A.T., S.T., D.Y., M.T., H. Yagyu, J.-i.O., S.I.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Manabu Takahashi
- From the Division of Endocrinology and Metabolism, Department of Medicine (K.S., S.N., T.W., B.T., H. Yamazaki, A.T., S.T., D.Y., M.T., H. Yagyu, J.-i.O., S.I.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Hiroaki Yagyu
- From the Division of Endocrinology and Metabolism, Department of Medicine (K.S., S.N., T.W., B.T., H. Yamazaki, A.T., S.T., D.Y., M.T., H. Yagyu, J.-i.O., S.I.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Jun-Ichi Osuga
- From the Division of Endocrinology and Metabolism, Department of Medicine (K.S., S.N., T.W., B.T., H. Yamazaki, A.T., S.T., D.Y., M.T., H. Yagyu, J.-i.O., S.I.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Masafumi Takahashi
- Division of Inflammation Research, Center for Molecular Medicine (T.K., M.T.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Shin-Ichi Tominaga
- Department of Biochemistry (H.H., M.H., S.-i.T.), Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Shun Ishibashi
- From the Division of Endocrinology and Metabolism, Department of Medicine (K.S., S.N., T.W., B.T., H. Yamazaki, A.T., S.T., D.Y., M.T., H. Yagyu, J.-i.O., S.I.), Jichi Medical University, Shimotsuke, Tochigi, Japan
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Jaworowski A, Hearps AC, Angelovich TA, Hoy JF. How Monocytes Contribute to Increased Risk of Atherosclerosis in Virologically-Suppressed HIV-Positive Individuals Receiving Combination Antiretroviral Therapy. Front Immunol 2019; 10:1378. [PMID: 31275317 PMCID: PMC6593090 DOI: 10.3389/fimmu.2019.01378] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 05/31/2019] [Indexed: 12/27/2022] Open
Abstract
Combination antiretroviral therapy (ART) is effective at suppressing HIV viremia to achieve persistently undetectable levels in peripheral blood in the majority of individuals with access and ability to maintain adherence to treatment. However, evidence suggests that ART is less effective at eliminating HIV-associated inflammation and innate immune activation. To the extent that residual inflammation and immune activation persist, virologically suppressed people living with HIV (PLWH) may have increased risk of inflammatory co-morbidities, and adjunctive therapies may need to be considered to reduce HIV-related inflammation and fully restore the health of virologically suppressed HIV+ individuals. Cardiovascular disease (CVD) is the single leading cause of death in the developed world and is becoming more important in PLWH with access to ART. Arterial disease due to atherosclerosis, leading to acute myocardial infarction (AMI) and stroke, is a major component of CVD. Atherosclerosis is an inflammatory disease, and epidemiological comparisons of atherosclerosis and AMI show a higher prevalence and suggest a greater risk in PLWH compared to the general population. The reasons for greater prevalence of CVD in PLWH can be broadly grouped into four categories: (a) the higher prevalence of traditional risk factors e.g., smoking and hypertension (b) dyslipidemia (also a traditional risk factor) caused by off-target effects of ART drugs (c) HIV-related inflammation and immune activation and (d) other undefined HIV-related factors. Management strategies aimed at reducing the impact of traditional risk factors in PLWH are similar to those for the general population and their effectiveness is currently being evaluated. Together with improvements in ART regimens and guidelines for treatment, and a greater awareness of its impact on CVD, the HIV-related risk of AMI and stroke is decreasing but remains elevated compared to the general community. Monocytes are key effector cells which initiate the formation of atherosclerotic plaques by migrating into the intima of coronary arteries and accumulating as foam cells full of lipid droplets. This review considers the specific role of monocytes as effector cells in atherosclerosis which progresses to AMI and stroke, and explores mechanisms by which HIV may promote an atherogenic phenotype and function independent of traditional risk factors. Altered monocyte function may represent a distinct HIV-related factor which increases risk of CVD in PLWH.
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Affiliation(s)
- Anthony Jaworowski
- School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC, Australia.,Department of Infectious Diseases, Alfred Hospital and Monash University, Melbourne, VIC, Australia.,Life Sciences Discipline, Burnet Institute, Melbourne, VIC, Australia
| | - Anna C Hearps
- Department of Infectious Diseases, Alfred Hospital and Monash University, Melbourne, VIC, Australia.,Life Sciences Discipline, Burnet Institute, Melbourne, VIC, Australia
| | - Thomas A Angelovich
- School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC, Australia.,Life Sciences Discipline, Burnet Institute, Melbourne, VIC, Australia
| | - Jennifer F Hoy
- Department of Infectious Diseases, Alfred Hospital and Monash University, Melbourne, VIC, Australia
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40
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Zhang D, Cao Y, Zuo Y, Wang Z, Mi X, Tang W. Integrated bioinformatics analysis reveals novel hub genes closely associated with pathological mechanisms of immunoglobulin A nephropathy. Exp Ther Med 2019; 18:1235-1245. [PMID: 31316619 PMCID: PMC6601137 DOI: 10.3892/etm.2019.7686] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Accepted: 05/09/2019] [Indexed: 02/06/2023] Open
Abstract
Immunoglobulin A (IgA) nephropathy (IgAN) is the most common glomerular disease. The major pathological changes associated with it affect cell proliferation, fibrosis, apoptosis, inflammation and extracellular matrix (ECM) organization. However, the molecular events underlying IgAN remain to be fully elucidated. In the present study, an integrated bioinformatics analysis was applied to further explore novel potential gene targets for IgAN. The mRNA expression profile datasets GSE93798 and GSE37460 were downloaded from the Gene Expression Omnibus database. After data preprocessing, differentially expressed genes (DEGs) were identified. Gene Ontology (GO) enrichment analysis of DEGs was performed. Protein-protein interaction (PPI) networks of the DEGs were built with the STRING online search tool and visualized by using Cytoscape, and hub genes were identified through the degree of connectivity in the PPI. The hub genes were subjected to Kyoto Encyclopedia of Genes and Genomes pathway analysis, and co-expression analysis was performed. A total of 298 DEGs between IgAN and control groups were identified, and 148 and 150 of these DEGs were upregulated and downregulated, respectively. The DEGs were enriched in distinct GO terms for Biological Process, including cell growth, epithelial cell proliferation, ERK1 and ERK2 cascades, regulation of apoptotic signaling pathway and ECM organization. The top 10 hub genes were then screened from the PPI network by Cytoscape. As novel hub genes, Fos proto-oncogene, AP-1 transcription factor subunit and early growth response 1 were determined to be closely associated with apoptosis and cell proliferation in IgAN. Tumor protein 53, integrin subunit β2 and fibronectin 1 may also be involved in the occurrence and development of IgAN. Co-expression analysis suggested that these hub genes were closely linked with each other. In conclusion, the present integrated bioinformatics analysis provided novel insight into the molecular events and novel candidate gene targets of IgAN.
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Affiliation(s)
- Dongmei Zhang
- Department of Nephrology, West China Hospital, Sichuan University, Chengdu, Sichuan 610000, P.R. China
| | - Yiling Cao
- Department of Nephrology, West China Hospital, Sichuan University, Chengdu, Sichuan 610000, P.R. China
| | - Yongdi Zuo
- Department of Nephrology, West China Hospital, Sichuan University, Chengdu, Sichuan 610000, P.R. China
| | - Zheng Wang
- Department of Nephrology, West China Hospital, Sichuan University, Chengdu, Sichuan 610000, P.R. China
| | - Xuhua Mi
- Department of Nephrology, West China Hospital, Sichuan University, Chengdu, Sichuan 610000, P.R. China
| | - Wanxin Tang
- Department of Nephrology, West China Hospital, Sichuan University, Chengdu, Sichuan 610000, P.R. China
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41
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Grahnert A, Weiss R, Schilling E, Stanslowsky N, Sack U, Hauschildt S. CD14 Counterregulates Lipopolysacharide-Induced Tumor Necrosis Factor-α Production in a Macrophage Subset. J Innate Immun 2019; 11:359-374. [PMID: 30654377 DOI: 10.1159/000495528] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 11/01/2018] [Indexed: 01/05/2023] Open
Abstract
In response to GM-CSF or M-CSF, macrophages (MΦ) can acquire pro- or anti-inflammatory properties, respectively. Given the importance of CD14 and Toll-like receptor (TLR) 4 in lipopolysaccharide (LPS)-induced signaling, we studied the effect of anti-CD14 antibody mediated CD14 blockade on LPS-induced cytokine production, signal transduction and on the expression levels of CD14 and TLR4 in GM-MΦ and M-MΦ. We found M-MΦ to express higher levels of both surface antigens and to produce more interferon (IFN)-β and interleukin-10, but less tumor necrosis factor (TNF)-α than GM-MΦ. Blockage of CD14 at high LPS concentrations increased the production of proinflammatory cytokines and decreased that of IFN-β in M-MΦ but not in GM-MΦ. We show that phosphorylation states of signaling molecules of the MyD88 (myeloid differentiation primary response 88), TRIF (TIR-domain-containing adapter-inducing IFN-β) and MAPK (mitogen-activated protein kinase) pathways are not altered in any way that would account for the cytokine overshoot reaction. However, CD14 blockage in M-MΦ decreased TLR4 and CD14 expression levels, regardless of the presence of LPS, indicating that the loss of the surface molecules prevented LPS from initiating TRIF signaling. As TNF-α synthesis was even upregulated under these experimental conditions, we suggest that TRIF is normally involved in restricting LPS-induced TNF-α overproduction. Thus, surface CD14 plays a decisive role in the biological response by determining LPS-induced signaling.
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Affiliation(s)
- Anja Grahnert
- Institute of Clinical Immunology, University of Leipzig Medical Faculty, University of Leipzig, Leipzig, Germany
| | - Ronald Weiss
- Institute of Clinical Immunology, University of Leipzig Medical Faculty, University of Leipzig, Leipzig, Germany
| | - Erik Schilling
- Institute of Clinical Immunology, University of Leipzig Medical Faculty, University of Leipzig, Leipzig, Germany
| | | | - Ulrich Sack
- Institute of Clinical Immunology, University of Leipzig Medical Faculty, University of Leipzig, Leipzig, Germany
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42
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Vorup-Jensen T, Jensen RK. Structural Immunology of Complement Receptors 3 and 4. Front Immunol 2018; 9:2716. [PMID: 30534123 PMCID: PMC6275225 DOI: 10.3389/fimmu.2018.02716] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Accepted: 11/05/2018] [Indexed: 01/10/2023] Open
Abstract
Complement receptors (CR) 3 and 4 belong to the family of beta-2 (CD18) integrins. CR3 and CR4 are often co-expressed in the myeloid subsets of leukocytes, but they are also found in NK cells and activated T and B lymphocytes. The heterodimeric ectodomain undergoes considerable conformational change in order to switch the receptor from a structurally bent, ligand-binding in-active state into an extended, ligand-binding active state. CR3 binds the C3d fragment of C3 in a way permitting CR2 also to bind concomitantly. This enables a hand-over of complement-opsonized antigens from the cell surface of CR3-expressing macrophages to the CR2-expressing B lymphocytes, in consequence acting as an antigen presentation mechanism. As a more enigmatic part of their functions, both CR3 and CR4 bind several structurally unrelated proteins, engineered peptides, and glycosaminoglycans. No consensus motif in the proteinaceous ligands has been established. Yet, the experimental evidence clearly suggest that the ligands are primarily, if not entirely, recognized by a single site within the receptors, namely the metal-ion dependent adhesion site (MIDAS). Comparison of some recent identified ligands points to CR3 as inclined to bind positively charged species, while CR4, by contrast, binds strongly negative-charged species, in both cases with the critical involvement of deprotonated, acidic groups as ligands for the Mg2+ ion in the MIDAS. These properties place CR3 and CR4 firmly within the realm of modern molecular medicine in several ways. The expression of CR3 and CR4 in NK cells was recently demonstrated to enable complement-dependent cell cytotoxicity toward antibody-coated cancer cells as part of biological therapy, constituting a significant part of the efficacy of such treatment. With the flexible principles of ligand recognition, it is also possible to propose a response of CR3 and CR4 to existing medicines thereby opening a possibility of drug repurposing to influence the function of these receptors. Here, from advances in the structural and cellular immunology of CR3 and CR4, we review insights on their biochemistry and functions in the immune system.
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Affiliation(s)
- Thomas Vorup-Jensen
- Biophysical Immunology Laboratory, Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Interdisciplinary Nanoscience Center, Aarhus University, Aarhus, Denmark
| | - Rasmus Kjeldsen Jensen
- Department of Molecular Biology and Genetics-Structural Biology, Aarhus University, Aarhus, Denmark
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Cui K, Ardell CL, Podolnikova NP, Yakubenko VP. Distinct Migratory Properties of M1, M2, and Resident Macrophages Are Regulated by α Dβ 2 and α Mβ 2 Integrin-Mediated Adhesion. Front Immunol 2018; 9:2650. [PMID: 30524429 PMCID: PMC6262406 DOI: 10.3389/fimmu.2018.02650] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 10/26/2018] [Indexed: 12/11/2022] Open
Abstract
Chronic inflammation is essential mechanism during the development of cardiovascular and metabolic diseases. The outcome of diseases depends on the balance between the migration/accumulation of pro-inflammatory (M1) and anti-inflammatory (M2) macrophages in damaged tissue. The mechanism of macrophage migration and subsequent accumulation is still not fully understood. Currently, the amoeboid adhesion-independent motility is considered essential for leukocyte migration in the three-dimensional environment. We challenge this hypothesis by studying the contribution of leukocyte adhesive receptors, integrins αMβ2, and αDβ2, to three-dimensional migration of M1-polarized, M2-polarized, and resident macrophages. Both integrins have a moderate expression on M2 macrophages, while αDβ2 is upregulated on M1 and αMβ2 demonstrates high expression on resident macrophages. The level of integrin expression determines its contribution to macrophage migration. Namely, intermediate expression supports macrophage migration, while a high integrin density inhibits it. Using in vitro three-dimensional migration and in vivo tracking of adoptively-transferred fluorescently-labeled macrophages during the resolution of inflammation, we found that strong adhesion of M1-activated macrophages translates to weak 3D migration, while moderate adhesion of M2-activated macrophages generates dynamic motility. Reduced migration of M1 macrophages depends on the high expression of αDβ2, since αD-deficiency decreased M1 macrophage adhesion and improved migration in fibrin matrix and peritoneal tissue. Similarly, the high expression of αMβ2 on resident macrophages prevents their amoeboid migration, which is markedly increased in αM-deficient macrophages. In contrast, αD- and αM-knockouts decrease the migration of M2 macrophages, demonstrating that moderate integrin expression supports cell motility. The results were confirmed in a diet-induced diabetes model. αD deficiency prevents the retention of inflammatory macrophages in adipose tissue and improves metabolic parameters, while αM deficiency does not affect macrophage accumulation. Summarizing, β2 integrin-mediated adhesion may inhibit amoeboid and mesenchymal macrophage migration or support mesenchymal migration in tissue, and, therefore, represents an important target to control inflammation.
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Affiliation(s)
- Kui Cui
- Department of Biomedical Sciences, Center of Excellence for Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Christopher L Ardell
- Department of Biomedical Sciences, Center of Excellence for Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
| | - Nataly P Podolnikova
- Center for Metabolic and Vascular Biology, School of Life Sciences, Arizona State University, Tempe, AZ, United States
| | - Valentin P Yakubenko
- Department of Biomedical Sciences, Center of Excellence for Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, United States
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Neog MK, Rasool M. Targeted delivery of p-coumaric acid encapsulated mannosylated liposomes to the synovial macrophages inhibits osteoclast formation and bone resorption in the rheumatoid arthritis animal model. Eur J Pharm Biopharm 2018; 133:162-175. [PMID: 30339889 DOI: 10.1016/j.ejpb.2018.10.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 10/13/2018] [Accepted: 10/15/2018] [Indexed: 12/21/2022]
Abstract
The current study aimed to target the delivery of p-coumaric acid (CA), a dietary polyphenol to the synovial macrophages of AIA rats via mannose incorporated liposomal delivery system (ML) with reference to osteoclastogenesis and bone resorption. In vivo imaging and in vitro drug release study indicated the efficiency of mannosylated liposomes to localize at the site of inflammation and increased sustain drug release respectively. Morphological assessment of isolated synovial macrophages with respect to CD86 (synovial macrophages) and CD51 (pre-/osteoclast) indicated that p-coumaric acid encapsulated mannosylated liposomes (ML-CA) inhibited the osteoclasts differentiation. ML-CA treatment inhibited the TRAP staining, downregulated the expression of MMP-9 and NFATc1 and inflammatory cytokines. The ex-vivo study specified the ability of CA to induce the OPG production in bone marrow stromal cell triggered macrophage-osteoclasts differentiation and to preserve the calcium content. Taken together, our results demonstrated that ML-CA could intervene in the osteoclast formation.
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Affiliation(s)
- Manoj Kumar Neog
- Immunopathology Lab, School of Bio Sciences and Technology, Vellore Institute of Technology (VIT), Vellore 632 014, Tamil Nadu, India
| | - Mahaboobkhan Rasool
- Immunopathology Lab, School of Bio Sciences and Technology, Vellore Institute of Technology (VIT), Vellore 632 014, Tamil Nadu, India.
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Yao Q, Liu J, Zhang Z, Li F, Zhang C, Lai B, Xiao L, Wang N. Peroxisome proliferator-activated receptor γ (PPARγ) induces the gene expression of integrin α Vβ 5 to promote macrophage M2 polarization. J Biol Chem 2018; 293:16572-16582. [PMID: 30181212 DOI: 10.1074/jbc.ra118.003161] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 08/14/2018] [Indexed: 12/20/2022] Open
Abstract
Peroxisome proliferator-activated receptor γ (PPARγ) is a member of the nuclear receptor superfamily and polarizes the macrophages into an anti-inflammatory M2 state. Integrins are transmembrane receptors that drive various cellular functions, including monocyte adhesion and foam cell formation. In this study, we first reported that the expression of integrins αV and β5 was up-regulated by PPARγ activation in RAW264.7 cells and human peripheral blood monocytes. Luciferase reporter and ChIP assay revealed that PPARγ directly bound to the potential PPAR-responsive elements sites in the 5'-flanking regions of both murine and human integrin αV and β5 genes, respectively. In addition, we showed that PPARγ augmented the ligation of integrins αV and β5 Knockdown of integrin αVβ5 by siRNA strategy or treatment with cilengitide, a potent inhibitor of integrin αVβ5, attenuated PPARγ-induced expression of Ym1 (chitinase-like protein 3), Arg1 (Arginase1), Fizz1 (resistin-like molecule RELMα), and other M2 marker genes, suggesting that the heterodimers of integrin αVβ5 were involved in PPARγ-induced M2 polarization. In conclusion, these results provided novel evidence that PPARγ-mediated gene expression and the ensuing ligation of integrins αV and β5 are implicated in macrophage M2 polarization.
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Affiliation(s)
- Qinyu Yao
- From the Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an 710061, China and
| | - Jia Liu
- From the Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an 710061, China and
| | - Zihui Zhang
- From the Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an 710061, China and
| | - Fan Li
- From the Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an 710061, China and
| | - Chao Zhang
- From the Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an 710061, China and
| | - Baochang Lai
- From the Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an 710061, China and
| | - Lei Xiao
- From the Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an 710061, China and
| | - Nanping Wang
- the Advanced Institute for Medical Sciences, Dalian Medical University, Dalian 116044, China
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Yakubenko VP, Cui K, Ardell CL, Brown KE, West XZ, Gao D, Stefl S, Salomon RG, Podrez EA, Byzova TV. Oxidative modifications of extracellular matrix promote the second wave of inflammation via β 2 integrins. Blood 2018; 132:78-88. [PMID: 29724896 PMCID: PMC6034644 DOI: 10.1182/blood-2017-10-810176] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 04/19/2018] [Indexed: 12/13/2022] Open
Abstract
Early stages of inflammation are characterized by extensive oxidative insult by recruited and activated neutrophils. Secretion of peroxidases, including the main enzyme, myeloperoxidase, leads to the generation of reactive oxygen species. We show that this oxidative insult leads to polyunsaturated fatty acid (eg, docosahexaenoate), oxidation, and accumulation of its product 2-(ω-carboxyethyl)pyrrole (CEP), which, in turn, is capable of protein modifications. In vivo CEP is generated predominantly at the inflammatory sites in macrophage-rich areas. During thioglycollate-induced inflammation, neutralization of CEP adducts dramatically reduced macrophage accumulation in the inflamed peritoneal cavity while exhibiting no effect on the early recruitment of neutrophils, suggesting a role in the second wave of inflammation. CEP modifications were abundantly deposited along the path of neutrophils migrating through the 3-dimensional fibrin matrix in vitro. Neutrophil-mediated CEP formation was markedly inhibited by the myeloperoxidase inhibitor, 4-ABH, and significantly reduced in myeloperoxidase-deficient mice. On macrophages, CEP adducts were recognized by cell adhesion receptors, integrin αMβ2 and αDβ2 Macrophage migration through CEP-fibrin gel was dramatically augmented when compared with fibrin alone, and was reduced by β2-integrin deficiency. Thus, neutrophil-mediated oxidation of abundant polyunsaturated fatty acids leads to the transformation of existing proteins into stronger adhesive ligands for αMβ2- and αDβ2-dependent macrophage migration. The presence of a carboxyl group rather than a pyrrole moiety on these adducts, resembling characteristics of bacterial and/or immobilized ligands, is critical for recognition by macrophages. Therefore, specific oxidation-dependent modification of extracellular matrix, aided by neutrophils, promotes subsequent αMβ2- and αDβ2-mediated migration/retention of macrophages during inflammation.
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Affiliation(s)
- Valentin P Yakubenko
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH; and the
| | - Kui Cui
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN
| | - Christopher L Ardell
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN
| | - Kathleen E Brown
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH; and the
| | - Xiaoxia Z West
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH; and the
| | - Detao Gao
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH; and the
| | - Samantha Stefl
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH; and the
| | - Robert G Salomon
- Department of Chemistry, Case Western Reserve University, Cleveland, OH
| | - Eugene A Podrez
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH; and the
| | - Tatiana V Byzova
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH; and the
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Szpak D, Izem L, Verbovetskiy D, Soloviev DA, Yakubenko VP, Pluskota E. α Mβ 2 Is Antiatherogenic in Female but Not Male Mice. THE JOURNAL OF IMMUNOLOGY 2018; 200:2426-2438. [PMID: 29459405 DOI: 10.4049/jimmunol.1700313] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 01/24/2018] [Indexed: 11/19/2022]
Abstract
Atherosclerosis is a complex inflammatory process characterized by monocyte recruitment into the arterial wall, their differentiation into macrophages, and lipid accumulation. Because integrin αMβ2 (CD11b/CD18) mediates multiple diverse functions of leukocytes, we examined its role in atherogenesis. αM-/-/ApoE-/- and ApoE-/- mice were fed a control or high fat diet for 3 or 16 wk to induce atherogenesis. Unexpectedly, αM deficiency accelerated development of atherosclerosis in female but not in male mice. The size of aortic root lesions was 3-4.5-fold larger in female αM-/-/ApoE-/- than in ApoE-/- mice. Monocyte and macrophage content within the lesions was increased 2.5-fold in female αM-/-/ApoE-/- mice due to enhanced proliferation. αMβ2 elimination promoted gender-dependent foam cell formation due to enhanced uptake of cholesterol by αM-/-/ApoE-/- macrophages. This difference was attributed to enhanced expression of lipid uptake receptors, CD36 and scavenger receptor A1 (SR-A1), in female mice. Macrophages from female αM-/-/ApoE-/- mice showed dramatically reduced expression of FoxM1 transcription factor and estrogen receptors (ER) α and β. As their antagonists inhibited the effect of 17β-estradiol (E2), E2 decreased CD36, SR-A1, and foam cell formation in ApoE-/- macrophages in an ERα- and ERβ-dependent manner. However, female αM-/-/ApoE-/- macrophages failed to respond to E2 and maintained elevated CD36, SR-A1, and lipid accumulation. FoxM1 inhibition in ApoE-/- macrophages reduced ERs and enhanced CD36 and SR-A1 expression, whereas FoxM1 overexpression in αM-/-/ApoE-/- macrophages reversed their proatherogenic phenotype. We demonstrate a new, surprising atheroprotective role of αMβ2 in female ApoE-/- mice. αMβ2 maintains ER expression in macrophages and E2-dependent inhibition of foam cell formation.
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Affiliation(s)
- Dorota Szpak
- Department of Molecular Cardiology, Cleveland Clinic, Cleveland, OH 44195
| | - Lahoucine Izem
- Department of Molecular and Cellular Medicine, Cleveland Clinic, Cleveland, OH 44195; and
| | | | - Dmitry A Soloviev
- Department of Molecular Cardiology, Cleveland Clinic, Cleveland, OH 44195
| | - Valentin P Yakubenko
- Department of Biomedical Sciences, Quillen College of Medicine, Johnson City, TN 37614
| | - Elzbieta Pluskota
- Department of Molecular Cardiology, Cleveland Clinic, Cleveland, OH 44195;
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Sun W, Lin Y, Chen L, Ma R, Cao J, Yao J, Chen K, Wan J. Legumain suppresses OxLDL-induced macrophage apoptosis through enhancement of the autophagy pathway. Gene 2018; 652:16-24. [PMID: 29414692 DOI: 10.1016/j.gene.2018.02.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 01/23/2018] [Accepted: 02/04/2018] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Autophagy plays a prominent role in the pathogenesis of plaques formation and progression of atherosclerosis (AS). The cysteine protease legumain is known to participate in atherogenesis, but its function and underlying mechanism in AS macrophages remain unclear. METHODS The expressions of legumain in plaques isolated from AS patients and in macrophages stimulated with oxLDL were examined. Moreover, we effectively altered legumain expression in macrophages to characterize the effect of legumain on oxLDL-induced macrophage apoptosis. The expression of apoptotic and autophagic factors was analysed. RESULTS Legumain was present in plaques, and its expression was upregulated in macrophages treated with oxLDL. Suppressing legumain significantly increased oxLDL-induced macrophage apoptosis and the expression of caspase 3, caspase 9 and Bax. However, legumain overexpression decreased macrophage apoptosis upon oxLDL exposure and the levels of caspase 3, caspase 9 and Bax. In addition, recombinant legumain protein suppressed macrophage apoptosis. Biochemical experiments revealed that legumain deficiency decreased the levels of Beclin1 and LC3, whereas increased legumain expression increased the levels of Beclin1 and LC3 significantly. CONCLUSION Legumain regulates oxLDL-induced macrophage apoptosis by enhancing the autophagy pathway, which may also influence the vulnerability of atherosclerotic plaques.
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Affiliation(s)
- Wenhua Sun
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, People's Republic of China
| | - Yingying Lin
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, People's Republic of China
| | - Liling Chen
- Department of Cardiology, Longyan First Hospital affiliated to Fujian Medical University, Fujian 364000, People's Republic of China
| | - Rong Ma
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, People's Republic of China
| | - Jiayu Cao
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, People's Republic of China
| | - Jing Yao
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, People's Republic of China
| | - Kaihong Chen
- Department of Cardiology, Longyan First Hospital affiliated to Fujian Medical University, Fujian 364000, People's Republic of China
| | - Jieqing Wan
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, People's Republic of China.
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Du YG, Zhang KN, Gao ZL, Dai F, Wu XX, Chai KF. Tangshen formula improves inflammation in renal tissue of diabetic nephropathy through SIRT1/NF-κB pathway. Exp Ther Med 2017; 15:2156-2164. [PMID: 29434819 DOI: 10.3892/etm.2017.5621] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 02/24/2017] [Indexed: 12/28/2022] Open
Abstract
The present study investigated the mechanism underlying the anti-inflammatory effects of Tangshen formula (TS) in Sprague Dawley (SD) rats with diabetic nephropathy (DN). A rat model of DN was established by intraperitoneal injection of 1% (40 mg/kg) streptozotocin and administration of a high fat and glucose diet. Subsequently, SD rats were randomly divided into six groups (n=8): A DN group, a valsartan group, a high-dose TS group, a middle-dose TS group, a low-dose TS group and a control group with normal SD rats. Once rats received their allocated treatment for 12 weeks, body weight and kidney weight were recorded, and fasting blood glucose, ratio of urinary protein, β2-MG and creatinine clearance rate were determined. Furthermore, hemodynamic indices, including plasma viscosity and whole blood reduction viscosity were detected. Immunohistochemistry was used to detect the infiltration of macrophages in the kidneys of rats. Reverse transcription-quantitative polymerase chain reaction and western blotting were performed to investigate the activation; mRNA and protein expression levels of monocyte chemoattractant protein-1 (MCP-1), macrophage migration inhibitory factor (MIF), nuclear factor-κB (NF-κB) and sirtuin-1 (SIRT1) in each group. In comparison with the DN group, each biochemical indicator of rats in the high-dose TS group was significantly decreased (P<0.05). Blood viscosity in each treatment group was significantly decreased when compared with the DN group (P<0.01). Hematoxylin and eosin staining indicated that the infiltration of macrophages was significantly decreased in the high-dose TS group when compared with the DN group (P<0.01). mRNA and protein expression levels of MCP-1 and MIF in the high-dose TS group were significantly decreased when compared with the DN group (P<0.05). In the treatment groups, SITR1 mRNA expression levels were significantly increased, whereas the mRNA expression levels of NF-κB were significantly decreased (P<0.01). Western blotting results indicated a significant decrease in the protein expression levels of acetylated NF-κB in the treatment groups when compared with the DN group (P<0.01) and the propensity of protein expression of the other inflammatory factors were consistent with the mRNA findings. The results of the high-dose TS group were similar to those of the valsartan group. The present study indicates that TS was able to activate SITR1, which lead to NF-κB deacetylation, thus reducing the release of inflammatory factors and decreasing the severity of diabetic nephropathy.
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Affiliation(s)
- Yue-Guang Du
- Department of Pathology, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Ke-Na Zhang
- Department of Pathology, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Zong-Lei Gao
- National Traditional Chinese Medicine Clinical Research Center, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Fengjiao Dai
- National Traditional Chinese Medicine Clinical Research Center, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Xi-Xi Wu
- National Traditional Chinese Medicine Clinical Research Center, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Ke-Fu Chai
- National Traditional Chinese Medicine Clinical Research Center, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
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