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Pineda GE, Rearte B, Todero MF, Bruballa AC, Bernal AM, Fernandez-Brando RJ, Isturiz MA, Zotta E, Alba-Soto CD, Palermo MS, Ramos MV. Absence of interleukin-10 reduces progression of shiga toxin-induced hemolytic uremic syndrome. Clin Sci (Lond) 2021; 135:575-588. [PMID: 33496327 DOI: 10.1042/cs20200468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 01/15/2021] [Accepted: 01/26/2021] [Indexed: 11/17/2022]
Abstract
Hemolytic Uremic Syndrome (HUS), a disease triggered by Shiga toxin (Stx), is characterized by hemolytic anemia, thrombocytopenia and renal failure. The inflammatory response mediated by polymorphonuclear neutrophils (PMNs) and monocytes is essential to HUS onset. Still, the role of anti-inflammatory cytokines is less clear. The deficiency of IL-10, an anti-inflammatory cytokine, leads to severe pathology in bacterial infections but also to beneficial effects in models of sterile injury. The aim of this work was to analyze the role of IL-10 during HUS. Control and IL-10 lacking mice (IL-10-/-) were intravenously injected with Stx type 2 (Stx2) and survival rate was evaluated. PMN and circulating and renal pro- and anti-inflammatory factors were analyzed by FACS and enzyme-linked immunosorbent assay (ELISA) respectively. IL-10-/- mice showed a higher survival associated with lower renal damage reflected by reduced plasma urea and creatinine levels than control mice. Circulating PMN increased at 72 h in both mouse strains accompanied by an up-regulation of CD11b in control mice. In parallel, renal PMN were significantly increased only in control mice after toxin. Plasma TNF-α, IL-6 and corticosterone levels were higher increased in IL-10-/- than control mice. Simultaneously renal TNF-α raised constantly but was accompanied by increased TGF-β levels in IL-10-/- mice. These results demonstrate that the profile of circulating and renal cytokines after Stx2 differed between strains suggesting that balance of these factors could participate in renal protection. We conclude that IL-10 absence has a protective role in an experimental model of HUS by reducing PMN recruitment into kidney and renal damage, and increasing mice survival.
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Affiliation(s)
- Gonzalo Ezequiel Pineda
- Laboratorio de Patogénesis e Inmunología de los Procesos Infecciosos, Instituto de Medicina Experimental (CONICET)-Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Bárbara Rearte
- Laboratorio de Fisiología de los Procesos Inflamatorios, Instituto de Medicina Experimental (CONICET)-Academia Nacional de Medicina, Buenos Aires, Argentina
| | - María Florencia Todero
- Laboratorio de Fisiología de los Procesos Inflamatorios, Instituto de Medicina Experimental (CONICET)-Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Andrea Cecilia Bruballa
- Laboratorio de Patogénesis e Inmunología de los Procesos Infecciosos, Instituto de Medicina Experimental (CONICET)-Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Alan Mauro Bernal
- Laboratorio de Patogénesis e Inmunología de los Procesos Infecciosos, Instituto de Medicina Experimental (CONICET)-Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Romina Jimena Fernandez-Brando
- Laboratorio de Patogénesis e Inmunología de los Procesos Infecciosos, Instituto de Medicina Experimental (CONICET)-Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Martin Amadeo Isturiz
- Laboratorio de Fisiología de los Procesos Inflamatorios, Instituto de Medicina Experimental (CONICET)-Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Elsa Zotta
- Laboratorio de Fisiopatogenia, Departamento de Ciencias Fisiológicas, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Catalina Dirney Alba-Soto
- Instituto de Microbiología y Parasitología Médica (IMPaM, CONICET-UBA), Departamento de Microbiología, Facultad de Medicina, Universidad de Buenos Aires (UBA), Buenos Aires, Argentina
| | - Marina Sandra Palermo
- Laboratorio de Patogénesis e Inmunología de los Procesos Infecciosos, Instituto de Medicina Experimental (CONICET)-Academia Nacional de Medicina, Buenos Aires, Argentina
| | - María Victoria Ramos
- Laboratorio de Patogénesis e Inmunología de los Procesos Infecciosos, Instituto de Medicina Experimental (CONICET)-Academia Nacional de Medicina, Buenos Aires, Argentina
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Cerutti ML, Benvenutti L, Nunes R, da Silva SR, Barauna SC, de Souza MM, Malheiros Â, Lacava L, Quintão NLM, Santin JR. Effects of 2',6'-dihydroxy-4'-methoxydihidrochalcone on innate inflammatory response. Naunyn Schmiedebergs Arch Pharmacol 2020; 393:2061-2072. [PMID: 32548784 DOI: 10.1007/s00210-020-01922-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Accepted: 06/07/2020] [Indexed: 12/01/2022]
Abstract
Chalcones present potential therapeutic activities reported on literature, which led us to evaluate the anti-inflammatory effects and the acute toxicity of 2',6'-dihydroxy-4'-methoxydihydrochalcone (DHMDC) using in vitro and in vivo models. The anti-inflammatory activity was firstly in vitro investigated using macrophages (RAW 264.7) and neutrophils previously treated with DHMCD activated with lipopolysaccharide (LPS). Nitrite, IL-1β, and TNF levels were measured in the macrophage culture supernatant, and the adhesion molecule expression (CD62L, CD49D, and CD18) was evaluated in neutrophils. Then, carrageenan-induced inflammation was performed in the subcutaneous tissue of male Swiss mice. Leukocyte migration and histological analysis were performed in the pouches. Toxicological studies were carried out on female Swiss mice (600 mg/kg) through biochemical parameters and histopathological analysis. In vitro, the DHMCD significantly reduced the IL-1β, TNF, and nitrite levels. The DHMCD was also able to modulate the percentage of positive neutrophils for CD62L, without modifying the expression of CD18 or CD49d. In vivo, DHMCD (3 mg/kg, p.o.) significantly reduced neutrophil migration to inflammatory exudate and subcutaneous tissue. No evidence of toxic effect was observed considering the biochemical parameters and histopathological analysis of liver and kidney. Together, the obtained data shows that DHMCD presents anti-inflammatory activity by modulating the macrophage inflammatory protein secretion and also by blocking the CD62L cleavage in neutrophils. Furthermore, there was not any evidence of toxic effect in acute toxicological analysis.
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Affiliation(s)
- Murilo Luiz Cerutti
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, Itajaí, Santa Catarina, 458, Brazil
| | - Larissa Benvenutti
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, Itajaí, Santa Catarina, 458, Brazil
| | - Roberta Nunes
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, Itajaí, Santa Catarina, 458, Brazil
| | - Silvia Ramos da Silva
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, Itajaí, Santa Catarina, 458, Brazil
| | - Sara Cristiane Barauna
- Department of Natural Sciences, Center for Exact and Natural Sciences, Universidade Regional de Blumenau, Blumenau, Santa Catarina, Brazil
| | - Márcia Maria de Souza
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, Itajaí, Santa Catarina, 458, Brazil
| | - Ângela Malheiros
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, Itajaí, Santa Catarina, 458, Brazil
| | - Letícia Lacava
- School of Health Sciences, Pharmacy Course, Universidade do Vale do Itajaí, Itajaí, Santa Catarina, Brazil
| | - Nara Lins Meira Quintão
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, Itajaí, Santa Catarina, 458, Brazil
| | - José Roberto Santin
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade do Vale do Itajaí-UNIVALI, Rua Uruguai, Itajaí, Santa Catarina, 458, Brazil.
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Metzemaekers M, Gouwy M, Proost P. Neutrophil chemoattractant receptors in health and disease: double-edged swords. Cell Mol Immunol 2020; 17:433-450. [PMID: 32238918 PMCID: PMC7192912 DOI: 10.1038/s41423-020-0412-0] [Citation(s) in RCA: 238] [Impact Index Per Article: 59.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 03/05/2020] [Indexed: 02/08/2023] Open
Abstract
Neutrophils are frontline cells of the innate immune system. These effector leukocytes are equipped with intriguing antimicrobial machinery and consequently display high cytotoxic potential. Accurate neutrophil recruitment is essential to combat microbes and to restore homeostasis, for inflammation modulation and resolution, wound healing and tissue repair. After fulfilling the appropriate effector functions, however, dampening neutrophil activation and infiltration is crucial to prevent damage to the host. In humans, chemoattractant molecules can be categorized into four biochemical families, i.e., chemotactic lipids, formyl peptides, complement anaphylatoxins and chemokines. They are critically involved in the tight regulation of neutrophil bone marrow storage and egress and in spatial and temporal neutrophil trafficking between organs. Chemoattractants function by activating dedicated heptahelical G protein-coupled receptors (GPCRs). In addition, emerging evidence suggests an important role for atypical chemoattractant receptors (ACKRs) that do not couple to G proteins in fine-tuning neutrophil migratory and functional responses. The expression levels of chemoattractant receptors are dependent on the level of neutrophil maturation and state of activation, with a pivotal modulatory role for the (inflammatory) environment. Here, we provide an overview of chemoattractant receptors expressed by neutrophils in health and disease. Depending on the (patho)physiological context, specific chemoattractant receptors may be up- or downregulated on distinct neutrophil subsets with beneficial or detrimental consequences, thus opening new windows for the identification of disease biomarkers and potential drug targets.
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Affiliation(s)
- Mieke Metzemaekers
- Laboratory of Molecular Immunology, Rega Institute, KU Leuven, Herestraat 49 bus 1042, B-3000, Leuven, Belgium
| | - Mieke Gouwy
- Laboratory of Molecular Immunology, Rega Institute, KU Leuven, Herestraat 49 bus 1042, B-3000, Leuven, Belgium
| | - Paul Proost
- Laboratory of Molecular Immunology, Rega Institute, KU Leuven, Herestraat 49 bus 1042, B-3000, Leuven, Belgium.
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Duque-Díaz E, Alvarez-Ojeda O, Coveñas R. Enkephalins and ACTH in the mammalian nervous system. VITAMINS AND HORMONES 2019; 111:147-193. [PMID: 31421699 DOI: 10.1016/bs.vh.2019.05.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The pentapeptides methionine-enkephalin and leucine-enkephalin belong to the opioid family of peptides, and the non-opiate peptide adrenocorticotropin hormone (ACTH) to the melanocortin peptide family. Enkephalins/ACTH are derived from pro-enkephalin, pro-dynorphin or pro-opiomelanocortin precursors and, via opioid and melanocortin receptors, are responsible for many biological activities. Enkephalins exhibit the highest affinity for the δ receptor, followed by the μ and κ receptors, whereas ACTH binds to the five subtypes of melanocortin receptor, and is the only member of the melanocortin family of peptides that binds to the melanocortin-receptor 2 (ACTH receptor). Enkephalins/ACTH and their receptors exhibit a widespread anatomical distribution. Enkephalins are involved in analgesia, angiogenesis, blood pressure, embryonic development, emotional behavior, feeding, hypoxia, limbic system modulation, neuroprotection, peristalsis, and wound repair; as well as in hepatoprotective, motor, neuroendocrine and respiratory mechanisms. ACTH plays a role in acetylcholine release, aggressive behavior, blood pressure, bone maintenance, hyperalgesia, feeding, fever, grooming, learning, lipolysis, memory, nerve injury repair, neuroprotection, sexual behavior, sleep, social behavior, tissue growth and stimulates the synthesis and secretion of glucocorticoids. Enkephalins/ACTH are also involved in many pathologies. Enkephalins are implicated in alcoholism, cancer, colitis, depression, heart failure, Huntington's disease, influenza A virus infection, ischemia, multiple sclerosis, and stress. ACTH plays a role in Addison's disease, alcoholism, cancer, Cushing's disease, dermatitis, encephalitis, epilepsy, Graves' disease, Guillain-Barré syndrome, multiple sclerosis, podocytopathies, and stress. In this review, we provide an updated description of the enkephalinergic and ACTH systems.
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Affiliation(s)
- Ewing Duque-Díaz
- Universidad de Santander UDES, Laboratory of Neurosciences, School of Medicine, Bucaramanga, Colombia.
| | - Olga Alvarez-Ojeda
- Universidad Industrial de Santander, Department of Pathology, School of Medicine, Bucaramanga, Colombia
| | - Rafael Coveñas
- Laboratory of Neuroanatomy of the Peptidergic Systems, Institute of Neurosciences of Castilla y León (INCYL), University of Salamanca, Salamanca, Spain
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Cockx M, Gouwy M, Godding V, De Boeck K, Van Damme J, Boon M, Struyf S. Neutrophils from Patients with Primary Ciliary Dyskinesia Display Reduced Chemotaxis to CXCR2 Ligands. Front Immunol 2017; 8:1126. [PMID: 29018439 PMCID: PMC5614927 DOI: 10.3389/fimmu.2017.01126] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 08/28/2017] [Indexed: 12/15/2022] Open
Abstract
Primary ciliary dyskinesia (PCD), cystic fibrosis (CF), and chronic obstructive airway disease are characterized by neutrophilic inflammation in the lungs. In CF and chronic obstructive airway disease, improper functioning of neutrophils has been demonstrated. We hypothesized that the pulmonary damage in PCD might be aggravated by abnormal functioning neutrophils either as a primary consequence of the PCD mutation or secondary to chronic inflammation. We analyzed chemotactic responses and chemoattractant receptor expression profiles of peripheral blood neutrophils from 36 patients with PCD, 21 healthy children and 19 healthy adults. We stimulated peripheral blood monocytes from patients and healthy controls and measured CXCL8 and IL-1β production with ELISA. PCD neutrophils displayed reduced migration toward CXCR2 ligands (CXCL5 and CXCL8) in the shape change, microchamber and microslide chemotaxis assays, whereas leukotriene B4 and complement component 5a chemotactic responses were not significantly different. The reduced response to CXCL8 was observed in all subgroups of patients with PCD (displaying either normal ultrastructure, dynein abnormalities or central pair deficiencies) and correlated with lung function. CXCR2 was downregulated in about 65% of the PCD patients, suggestive for additional mechanisms causing CXCR2 impairment. After treatment with the TLR ligands lipopolysaccharide and peptidoglycan, PCD monocytes produced more CXCL8 and IL-1β compared to controls. Moreover, PCD monocytes also responded stronger to IL-1β stimulation in terms of CXCL8 production. In conclusion, we revealed a potential link between CXCR2 and its ligand CXCL8 and the pathogenesis of PCD.
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Affiliation(s)
- Maaike Cockx
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Mieke Gouwy
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Véronique Godding
- Unité de Pneumologie Pédiatrique et Mucoviscidose, Clinique Universitaire Saint-Luc UCL Brussels, Brussels, Belgium
| | - Kris De Boeck
- Pediatric Pulmonology and Cystic Fibrosis Unit, Department of Pediatrics, University Hospitals Leuven, Leuven, Belgium
| | - Jo Van Damme
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Mieke Boon
- Pediatric Pulmonology and Cystic Fibrosis Unit, Department of Pediatrics, University Hospitals Leuven, Leuven, Belgium
| | - Sofie Struyf
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
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Tonin TD, Thiesen LC, de Oliveira Nunes ML, Broering MF, Donato MP, Goss MJ, Petreanu M, Niero R, Machado ID, Santin JR. Rubus imperialis (Rosaceae) extract and pure compound niga-ichigoside F1: wound healing and anti-inflammatory effects. Naunyn Schmiedebergs Arch Pharmacol 2016; 389:1235-1244. [PMID: 27527496 DOI: 10.1007/s00210-016-1285-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 08/08/2016] [Indexed: 12/13/2022]
Abstract
Here, we evaluate the anti-inflammatory and wound-healing effects of methanolic crude extract obtained from aerial parts (leaves and branches) of Rubus imperialis Chum. Schl. (Rosaceae) and the pure compound niga-ichigoside F1. Anti-inflammatory activity was determined in vivo and in vitro, and the healing effect was evaluated in surgical lesions in mice skin. The 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) assay and H2O2-induced oxidative stress were used to determine antioxidant activity. The efferocytosis activity was also determined. The data obtained show that the extract of R. imperialis promote reduction in the inflammatory process induced by lipopolysaccharide (LPS) or carrageenan in the air pouch model; the effects could be reinforced by nitric oxide reduction in LPS-stimulated neutrophils, and an increase in the efferocytosis. The extract showed wound healing property in vitro and in vivo, scavenging activity for DPPH, and cytoprotection in the H2O2-induced oxidative stress in L929 cells. In addition, the compound niga-ichigoside F1 was able to reduce the NO secretion; however, it did not present wound-healing activity in vitro. Together, the data obtained point out the modulatory actions of R. imperialis extract on leukocyte migration to the inflamed tissue, the antioxidant, and the pro-resolutive activity. However, the R. imperialis anti-inflammatory activity may be mediated in parts by niga-ichigoside F1, and on wound healing do not correlated with niga-ichigoside F1.
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Affiliation(s)
- Talita Dacroce Tonin
- Programa de Pós-Graduação em Ciências Farmacêuticas and Núcleo de Investigações Químico-Farmacêuticas-NIQFAR, Universidade do Vale do Itajaí - UNIVALI, Rua Uruguai, 458, Itajaí, SC, 88302-901, Brazil
| | - Liliani Carolini Thiesen
- Programa de Pós-Graduação em Ciências Farmacêuticas and Núcleo de Investigações Químico-Farmacêuticas-NIQFAR, Universidade do Vale do Itajaí - UNIVALI, Rua Uruguai, 458, Itajaí, SC, 88302-901, Brazil
| | - Maria Luisa de Oliveira Nunes
- Programa de Pós-Graduação em Ciências Farmacêuticas and Núcleo de Investigações Químico-Farmacêuticas-NIQFAR, Universidade do Vale do Itajaí - UNIVALI, Rua Uruguai, 458, Itajaí, SC, 88302-901, Brazil
| | - Milena Fronza Broering
- Programa de Pós-Graduação em Ciências Farmacêuticas and Núcleo de Investigações Químico-Farmacêuticas-NIQFAR, Universidade do Vale do Itajaí - UNIVALI, Rua Uruguai, 458, Itajaí, SC, 88302-901, Brazil
| | - Marcos Paulo Donato
- Programa de Pós-Graduação em Ciências Farmacêuticas and Núcleo de Investigações Químico-Farmacêuticas-NIQFAR, Universidade do Vale do Itajaí - UNIVALI, Rua Uruguai, 458, Itajaí, SC, 88302-901, Brazil
| | - Marina Jagielski Goss
- Programa de Pós-Graduação em Ciências Farmacêuticas and Núcleo de Investigações Químico-Farmacêuticas-NIQFAR, Universidade do Vale do Itajaí - UNIVALI, Rua Uruguai, 458, Itajaí, SC, 88302-901, Brazil
| | - Marcel Petreanu
- Programa de Pós-Graduação em Ciências Farmacêuticas and Núcleo de Investigações Químico-Farmacêuticas-NIQFAR, Universidade do Vale do Itajaí - UNIVALI, Rua Uruguai, 458, Itajaí, SC, 88302-901, Brazil
| | - Rivaldo Niero
- Programa de Pós-Graduação em Ciências Farmacêuticas and Núcleo de Investigações Químico-Farmacêuticas-NIQFAR, Universidade do Vale do Itajaí - UNIVALI, Rua Uruguai, 458, Itajaí, SC, 88302-901, Brazil
| | - Isabel Daufenback Machado
- Programa de Pós-Graduação em Ciências Farmacêuticas and Núcleo de Investigações Químico-Farmacêuticas-NIQFAR, Universidade do Vale do Itajaí - UNIVALI, Rua Uruguai, 458, Itajaí, SC, 88302-901, Brazil
| | - José Roberto Santin
- Programa de Pós-Graduação em Ciências Farmacêuticas and Núcleo de Investigações Químico-Farmacêuticas-NIQFAR, Universidade do Vale do Itajaí - UNIVALI, Rua Uruguai, 458, Itajaí, SC, 88302-901, Brazil.
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Machado ID, Spatti M, Hastreiter A, Santin JR, Fock RA, Gil CD, Oliani SM, Perretti M, Farsky SHP. Annexin A1 Is a Physiological Modulator of Neutrophil Maturation and Recirculation Acting on the CXCR4/CXCL12 Pathway. J Cell Physiol 2016; 231:2418-27. [PMID: 26892496 DOI: 10.1002/jcp.25346] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 02/16/2016] [Indexed: 12/18/2022]
Abstract
Neutrophil production and traffic in the body compartments is finely controlled, and the strong evidences support the role of CXCL12/CXCR4 pathway on neutrophil trafficking to and from the bone marrow (BM). We recently showed that the glucocorticoid-regulated protein, Annexin A1 (AnxA1) modulates neutrophil homeostasis and here we address the effects of AnxA1 on steady-state neutrophil maturation and trafficking. For this purpose, AnxA1(-/-) and Balb/C wild-type mice (WT) were donors of BM granulocytes and mesenchymal stem cells and blood neutrophils. In vivo treatments with the pharmacological AnxA1 mimetic peptide (Ac2-26) or the formyl peptide receptor (FPR) antagonist (Boc-2) were used to elucidate the pathway of AnxA1 action, and with the cytosolic glucocorticoid antagonist receptor RU 38486. Accelerated maturation of BM granulocytes was detected in AnxA1(-/-) and Boc2-treated WT mice, and was reversed by treatment with Ac2-26 in AnxA1(-/-) mice. AnxA1 and FPR2 were constitutively expressed in bone marrow granulocytes, and their expressions were reduced by treatment with RU38486. Higher numbers of CXCR4(+) neutrophils were detected in the circulation of AnxA1(-/-) or Boc2-treated WT mice, and values were rescued in Ac2-26-treated AnxA1(-/-) mice. Although circulating neutrophils of AnxA1(-/-) animals were CXCR4(+) , they presented reduced CXCL12-induced chemotaxis. Moreover, levels of CXCL12 were reduced in the bone marrow perfusate and in the mesenchymal stem cell supernatant from AnxA1(-/-) mice, and in vivo and in vitro CXCL12 expression was re-established after Ac2-26 treatment. Collectively, these data highlight AnxA1 as a novel determinant of neutrophil maturation and the mechanisms behind blood neutrophil homing to BM via the CXCL12/CXCR4 pathway. J. Cell. Physiol. 231: 2418-2427, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Isabel Daufenback Machado
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Marina Spatti
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Araceli Hastreiter
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - José Roberto Santin
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Ricardo Ambrósio Fock
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Cristiane Damas Gil
- Department of Morphology and Genetics, Federal University of São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
| | - Sonia Maria Oliani
- Department of Biology, Instituto de Biociências, Letras e Ciências Exatas (IBILCE), São Paulo State University (UNESP), São José do Rio Preto, São Paulo, Brazil
| | - Mauro Perretti
- Centre for Biochemical Pharmacology, The William Harvey Research Institute, Barts and The London School of Medicine, Queen Mary University of London, London, United Kingdom
| | - Sandra Helena Poliselli Farsky
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil
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