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Wang R, Zhang S, Liu Y, Li H, Guan S, Zhu L, Jia L, Liu Z, Xu H. The role of macrophage polarization and related key molecules in pulmonary inflammation and fibrosis induced by coal dust dynamic inhalation exposure in Sprague-Dawley rats. Cytokine 2024; 173:156419. [PMID: 37976700 DOI: 10.1016/j.cyto.2023.156419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/26/2023] [Accepted: 11/01/2023] [Indexed: 11/19/2023]
Abstract
Coal dust is the main occupational hazard factor during coal mining operations. This study aimed to investigate the role of macrophage polarization and its molecular regulatory network in lung inflammation and fibrosis in Sprague-Dawley rats caused by coal dust exposure. Based on the key exposure parameters (exposure route, dose and duration) of the real working environment of coal miners, the dynamic inhalation exposure method was employed, and a control group and three coal dust groups (4, 10 and 25 mg/m3) were set up. Lung function was measured after 30, 60 and 90 days of coal dust exposure. Meanwhile, the serum, lung tissue and bronchoalveolar lavage fluid were collected after anesthesia for downstream experiments (histopathological analysis, RT-qPCR, ELISA, etc.). The results showed that coal dust exposure caused stunted growth, increased lung organ coefficient and decreased lung function in rats. The expression level of the M1 macrophage marker iNOS was significantly upregulated in the early stage of exposure and was accompanied by higher expression of the inflammatory cytokines TNF-α, IL-1β, IL-6 and the chemokines IL-8, CCL2 and CCL5, with the most significant trend of CCL5 mRNA in lung tissues. Expression of the M2 macrophage marker Arg1 was significantly upregulated in the mid to late stages of coal dust exposure and was accompanied by higher expression of the anti-inflammatory cytokines IL-10 and TGF-β. In conclusion, macrophage polarization and its molecular regulatory network (especially CCL5) play an important role in lung inflammation and fibrosis in SD rats exposed to coal dust by dynamic inhalation.
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Affiliation(s)
- Rui Wang
- School of Public Health, Ningxia Medical University, Yinchuan, Ningxia 750004, China; The Key Laboratory of Environmental Factors and Chronic Disease Control of Ningxia, No. 1160, Shengli Street, Xingqing District, Yinchuan, Ningxia 750004, China
| | - Siyi Zhang
- Wuxi Center For Disease Control And Prevention, Wuxi, Jiangsu 214000, China
| | - Yifei Liu
- School of Public Health, Ningxia Medical University, Yinchuan, Ningxia 750004, China; The Key Laboratory of Environmental Factors and Chronic Disease Control of Ningxia, No. 1160, Shengli Street, Xingqing District, Yinchuan, Ningxia 750004, China
| | - Hongmei Li
- The Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Ningxia Medical University, Yinchuan, Ningxia 750004, China
| | - Suzhen Guan
- School of Public Health, Ningxia Medical University, Yinchuan, Ningxia 750004, China; The Key Laboratory of Environmental Factors and Chronic Disease Control of Ningxia, No. 1160, Shengli Street, Xingqing District, Yinchuan, Ningxia 750004, China
| | - Lingqin Zhu
- School of Public Health, Ningxia Medical University, Yinchuan, Ningxia 750004, China; The Key Laboratory of Environmental Factors and Chronic Disease Control of Ningxia, No. 1160, Shengli Street, Xingqing District, Yinchuan, Ningxia 750004, China
| | - Leina Jia
- School of Public Health, Ningxia Medical University, Yinchuan, Ningxia 750004, China; The Key Laboratory of Environmental Factors and Chronic Disease Control of Ningxia, No. 1160, Shengli Street, Xingqing District, Yinchuan, Ningxia 750004, China
| | - Zhihong Liu
- School of Public Health, Ningxia Medical University, Yinchuan, Ningxia 750004, China; The Key Laboratory of Environmental Factors and Chronic Disease Control of Ningxia, No. 1160, Shengli Street, Xingqing District, Yinchuan, Ningxia 750004, China.
| | - Haiming Xu
- School of Public Health, Ningxia Medical University, Yinchuan, Ningxia 750004, China; The Key Laboratory of Environmental Factors and Chronic Disease Control of Ningxia, No. 1160, Shengli Street, Xingqing District, Yinchuan, Ningxia 750004, China.
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Scalia Carneiro AP, Algranti E, Chérot‐Kornobis N, Silva Bezerra F, Tibiriça Bon AM, Felicidade Tomaz Braz N, Soares Souza DM, Paula Costa G, Bussacos MA, Paula Alves Bezerra OM, Talvani A. Inflammatory and oxidative stress biomarkers induced by silica exposure in crystal craftsmen. Am J Ind Med 2020; 63:337-347. [PMID: 31953962 DOI: 10.1002/ajim.23088] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 12/20/2019] [Accepted: 01/03/2020] [Indexed: 01/15/2023]
Abstract
BACKGROUND Identification of biomarkers associated with the diagnosis and prognosis of silicosis would be highly advantageous in the clinical setting. The aim of this study is to evaluate inflammatory and oxidative stress biomarkers in subjects exposed to silica. METHODS A cross-sectional study of crystal craftsmen currently (n = 34) or formerly (n = 35) exposed and a group of nonexposed subjects (n = 12) was performed. Personal respirable dust samples were collected. Plasma inflammatory mediators (bone morphogenetic protein- BMP2 and chemokines CXCL16, and CCL5), oxidative stress enzymes (thiobarbituric acid reactive substances [TBARs] and superoxide dismutase [SOD]), and nitrite (NO2 - ) were analyzed in parallel with nitric oxide in exhaled breath (FeNO). RESULTS Being currently or formerly exposed to silica was related to increased levels of CXCL16 and TBARs. Currently, exposed subjects showed decreased levels of SOD. Thirty-seven craftsmen with silicosis (26 formerly and 11 currently exposed) showed higher levels of CXCL16, which was positively associated with the radiological severity of silicosis. Compared with the nonexposed, subjects with silicosis had higher levels of TBARs and those with complicated silicosis had lower levels of SOD. In multivariate analysis, higher levels of CXCL16 were associated with exposure status and radiological severity of silicosis. Smoking was not a confounder. FeNO did not distinguish between the exposure status and the presence of silicosis. CONCLUSION CXCL16 emerged as a potential biomarker that could distinguish both silica exposure and silicosis. TBARs were elevated in exposed individuals. However, their clinical applications demand further investigation in follow-up studies of representative samples.
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Affiliation(s)
- Ana Paula Scalia Carneiro
- Workers' Health Division of the Clinics Hospital of Federal University of Minas GeraisBelo Horizonte Brazil
| | | | | | - Frank Silva Bezerra
- Laboratory of Experimental Pathophysiology/DECBIFederal University of Ouro PretoOuro Preto Minas Gerais Brazil
| | | | - Nayara Felicidade Tomaz Braz
- Interdisciplinary Laboratory for Medical Research, Department of Neuroscience, School of MedicineFederal University of Minas GeraisBelo Horizonte Brazil
| | | | - Guilherme Paula Costa
- Laboratory of Immunobiology of Inflammation/DECBIFederal University of Ouro PretoOuro Preto Brazil
| | | | - Olívia Maria Paula Alves Bezerra
- School of Medicine, Department of Family Medicine, Mental and Collective HealthFederal University of Ouro PretoOuro Preto Minas Gerais Brazil
| | - André Talvani
- Laboratory of Immunobiology of Inflammation/DECBIFederal University of Ouro PretoOuro Preto Brazil
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Cadusseau J, Ragunathan-Thangarajah N, Surenaud M, Hue S, Authier FJ, Gherardi RK. Selective elevation of circulating CCL2/MCP1 levels in patients with longstanding post-vaccinal macrophagic myofasciitis and ASIA. Curr Med Chem 2014; 21:511-7. [PMID: 24083602 DOI: 10.2174/09298673113206660287] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Revised: 03/27/2013] [Accepted: 09/18/2013] [Indexed: 02/08/2023]
Abstract
Several medical conditions sharing similar signs and symptoms may be related to immune adjuvants. These conditions described as ASIA (Autoimmune/inflammatory Syndrome Induced by Adjuvants), include a condition characterized by macrophagic myofasciitis (MMF) assessing long-term persistence of vaccine derived-alum adjuvants into macrophages at sites of previous immunization. Despite increasing data describing clinical manifestations of ASIA have been reported, biological markers are particularly lacking for their characterization and follow up. We report an extensive cytokine screening performed in serum from 44 MMF patients compared both to sex and age matched healthy controls and to patients with various types of inflammatory neuromuscular diseases. Thirty cytokines were quantified using combination of Luminex® technology and ELISA. There was significant mean increase of serum levels of the monocytechemoattractant protein 1 (CCL2/MCP-1) in MMF patients compared to healthy subjects. MMF patients showed no elevation of other cytokines. This contrasted with inflammatory patients in whom CCL2/MCP-1 serum levels were unchanged, whereas several other inflammatory cytokines were elevated (IL1β, IL5 and CCL3/MIP1α). These results suggest that CCL2 may represent a biological marker relevant to the pathophysiology of MMF rather than a non specific inflammatory marker and that it should be checked in the other syndromes constitutive of ASIA.
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Affiliation(s)
| | | | | | | | | | - Romain K Gherardi
- Université Paris Est, Faculté de Sciences et Technologie, Créteil, 94000, France.
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Chu M, Ji X, Chen W, Zhang R, Sun C, Wang T, Luo C, Gong J, Zhu M, Fan J, Hou Z, Dai J, Jin G, Wu T, Chen F, Hu Z, Ni C, Shen H. A genome-wide association study identifies susceptibility loci of silica-related pneumoconiosis in Han Chinese. Hum Mol Genet 2014; 23:6385-94. [DOI: 10.1093/hmg/ddu333] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Nasi M, Riva A, Borghi V, D'Amico R, Del Giovane C, Casoli C, Galli M, Vicenzi E, Gibellini L, De Biasi S, Clerici M, Mussini C, Cossarizza A, Pinti M. Novel genetic association of TNF-α-238 and PDCD1-7209 polymorphisms with long-term non-progressive HIV-1 infection. Int J Infect Dis 2013; 17:e845-50. [PMID: 23403273 DOI: 10.1016/j.ijid.2013.01.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 12/27/2012] [Accepted: 01/06/2013] [Indexed: 10/27/2022] Open
Abstract
OBJECTIVES About 2-5% of HIV-1-infected subjects, defined as long-term non-progressors (LTNPs), remain immunologically stable for a long time without treatment. The factors governing this condition are known only in part, and include genetic factors. Thus, we studied 20 polymorphisms of 15 genes encoding proinflammatory and immunoregulatory cytokines, chemokines and their receptors, genes involved in apoptosis, and the gene HCP5. METHODS We analyzed 47 Caucasian LTNPs infected for >9 years, compared with 131 HIV-1-infected Caucasian patients defined as 'usual progressors'. The genotypes were determined by methods based upon PCR, and the statistical analysis was performed by univariate logistic regression. RESULTS The well-known CCR5Δ32 del32 allele, the cell death-related TNF-α-238 A and PDCD1-7209 T alleles, and HCP5 rs2395029 G, a non-coding protein associated with the HLA-B*5701, were found positively associated with the LTNP condition. No association was observed for other single nucleotide polymorphisms (SDF-1-801, IL-10-592, MCP-1-2518, CX3CR1 V249I, CCR2V64I, RANTES-403, IL-2-330, IL-1β-511, IL-4-590, FASL IVS3nt-169, FAS-670, FAS-1377, FASL IVS2nt-124, PDCD1-7146, MMP-7-181, and MMP7-153). CONCLUSIONS The novel genetic associations between allelic variants of genes TNF-α-238 and PDCD1-7209 with the LTNP condition underline the importance of host genetic factors in the progression of HIV-1 infection and in immunological preservation.
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Affiliation(s)
- Milena Nasi
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy.
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Abstract
Molecular mechanisms in the pathogenesis of silicosis are not fully understood. Exposure to crystalline silica leads to the activation of signaling pathways controlling the production and secretion of inflammatory mediators. Inflammatory cytokines are noted as important candidate genes for fibrotic lung diseases. Cytokines, chemokines, and variations of their genes have been associated with upregulation or downregulation of chronic inflammatory mediators. Variations in the interleukin (IL)-18, IL-8 and chemokine receptor CXCR2 genes are believed to influence the risk of silicosis in stone-grinding factory workers in Iran. Allele-specific oligonucleotide polymerase chain reaction (PCR) procedure was carried out for IL-18 −137 and IL-18 −607, meanwhile touchdown PCR was performed for IL-8 −251 and CXCR2 +1208 genotyping. Variation in genotypic and allelic frequencies was not statistically different among cases versus controls ( p > 0.05). These findings indicated for the first time that IL-18 −137, IL-18 −607, IL-8 −251, and CXCR2 +1208 are suggested not to influence the risk of silicosis in tested occupational group.
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Muzaffar SAF, Christiani DC. Frontiers in occupational and environmental lung disease research. Chest 2012; 141:772-781. [PMID: 22396562 DOI: 10.1378/chest.11-0156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Two central challenges in the field of occupational and environmental epidemiology include accurately measuring biologic responses to exposure and preventing subsequent disease. As exposure-related lung diseases continue to be identified, advances in exposure biology have introduced toxicogenomic approaches that detect biomarkers of exposure at the gene, protein, and metabolite levels. Moreover, genetic epidemiology research has focused more recently on common, low-penetrant (ie, low-relative-risk) genetic variants that may interact with commonly encountered exposures. A number of such gene by environment interactions have been identified for airways and interstitial lung diseases, with the goal of preventing disease among susceptible populations that may not otherwise have been identified. Exhaled breath condensate analysis has provided another noninvasive means of assessing toxicant exposures and systemic effects. As these technologies become more refined, clinicians and public health practitioners will need to appreciate the social implications of the individual- and population-level risks conferred by certain genetic polymorphisms or by biomarker evidence of exposure. At present, the primary approach to occupational and environmental lung disease prevention remains elimination or reduction of known hazardous exposures and requires continued application of local and international resources toward exposure control.
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Affiliation(s)
- Saeher A F Muzaffar
- Division of Pulmonary, Allergy, and Critical Care Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA
| | - David C Christiani
- Department of Environmental Health and Epidemiology, Harvard School of Public Health, Massachusetts General Hospital, Boston, MA; Departments of Harvard Medical School, Massachusetts General Hospital, Boston, MA; Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Boston, MA.
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Darbandi-Tehrani K, Hermand P, Carvalho S, Dorgham K, Couvineau A, Lacapère JJ, Combadière C, Deterre P. Subtle conformational changes between CX3CR1 genetic variants as revealed by resonance energy transfer assays. FASEB J 2010; 24:4585-98. [PMID: 20667981 DOI: 10.1096/fj.10-156612] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The chemokine CX3CL1 is expressed as a membrane protein that forms a potent adhesive pair with its unique receptor CX3CR1. This receptor has 3 natural variants, V249-T280 (VT), I249-T280 (IT), and I249-M280 (IM), whose relative frequencies are significantly associated with the incidence of various inflammatory diseases. To assess the adhesive potency of CX3CR1 and the molecular diversity of its variants, we assayed their clustering status and their possible structural differences by fluorescence/bioluminescence resonance energy transfer (FRET or BRET) techniques. FRET assays by flow cytometry showed that the CX3CR1 variants cluster, in comparison with appropriate controls. BRET assays showed low nonspecific signals for VT and IT variants and high specific signals for IM, and thus pointed out a structural difference in this variant. We used molecular modeling to show how natural point mutations of CX3CR1 affect the packing of the 6th and 7th helices of this G-protein coupled receptor. Moreover, we found that the BRET technique is sensitive enough to detect these tiny changes. Consistently with our previous finding that CX3CL1 aggregates, our data here indicate that CX3CR1 clustering may contribute to the adhesiveness of the CX3CL1-CX3CR1 pair and may thus represent a new target for anti-inflammatory therapies.
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Metzger KJ, Thomas MA. Evidence of positive selection at codon sites localized in extracellular domains of mammalian CC motif chemokine receptor proteins. BMC Evol Biol 2010; 10:139. [PMID: 20459756 PMCID: PMC2880985 DOI: 10.1186/1471-2148-10-139] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2009] [Accepted: 05/10/2010] [Indexed: 02/28/2023] Open
Abstract
Background CC chemokine receptor proteins (CCR1 through CCR10) are seven-transmembrane G-protein coupled receptors whose signaling pathways are known for their important roles coordinating immune system responses through targeted trafficking of white blood cells. In addition, some of these receptors have been identified as fusion proteins for viral pathogens: for example, HIV-1 strains utilize CCR5, CCR2 and CCR3 proteins to obtain cellular entry in humans. The extracellular domains of these receptor proteins are involved in ligand-binding specificity as well as pathogen recognition interactions. In mammals, the majority of chemokine receptor genes are clustered together; in humans, seven of the ten genes are clustered in the 3p21-24 chromosome region. Gene conversion events, or exchange of DNA sequence between genes, have been reported in chemokine receptor paralogs in various mammalian lineages, especially between the cytogenetically closely located pairs CCR2/5 and CCR1/3. Datasets of mammalian orthologs for each gene were analyzed separately to minimize the potential confounding impact of analyzing highly similar sequences resulting from gene conversion events. Molecular evolution approaches and the software package Phylogenetic Analyses by Maximum Likelihood (PAML) were utilized to investigate the signature of selection that has acted on the mammalian CC chemokine receptor (CCR) gene family. The results of neutral vs. adaptive evolution (positive selection) hypothesis testing using Site Models are reported. In general, positive selection is defined by a ratio of nonsynonymous/synonymous nucleotide changes (dN/dS, or ω) >1. Results Of the ten mammalian CC motif chemokine receptor sequence datasets analyzed, only CCR2 and CCR3 contain amino acid codon sites that exhibit evidence of positive selection using site based hypothesis testing in PAML. Nineteen of the twenty codon sites putatively indentified as likely to be under positive selection code for amino acid residues located in extracellular domains of the receptor protein products. Conclusions These results suggest that amino acid residues present in intracellular and membrane-bound domains are more selectively constrained for functional signal transduction and homo- or heterodimerization, whereas amino acid residues in extracellular domains of these receptor proteins evolve more quickly, perhaps due to heightened selective pressure resulting from ligand-binding and pathogen interactions of extracellular domains.
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Affiliation(s)
- Kelsey J Metzger
- Department of Biological Sciences, Idaho State University, Pocatello, 83209, USA.
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Chono S, Tanino T, Seki T, Morimoto K. Uptake characteristics of liposomes by rat alveolar macrophages: influence of particle size and surface mannose modification. J Pharm Pharmacol 2010; 59:75-80. [PMID: 17227623 DOI: 10.1211/jpp.59.1.0010] [Citation(s) in RCA: 130] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
The influence of particle size and surface mannose modification on the uptake of liposomes by alveolar macrophages (AMs) was investigated in-vitro and in-vivo. Non-modified liposomes of five different particle sizes (100, 200, 400, 1000 and 2000 nm) and mannosylated liposomes with 4-aminophenyl-α-D-mannopyranoside (particle size 1000 nm) were prepared, and the uptake characteristics by rat AMs in-vitro and in-vivo were examined. The uptake of non-modified liposomes by rat AMs in-vitro increased with an increase in particle size over the range of 100–1000 nm, and became constant at over 1000 nm. The uptake of non-modified liposomes by AMs after pulmonary administration to rats in-vivo increased with an increase in particle size in the range 100–2000 nm. The uptake of mannosylated liposomes (particle size 1000 nm) by rat AMs both in-vitro and in-vivo was significantly greater than that of non-modified liposomes (particle size 1000 nm). The results indicate that the uptake of liposomes by rat AMs is dependent on particle size and is increased by surface mannose modification.
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Affiliation(s)
- Sumio Chono
- Department of Pharmaceutics, Hokkaido Pharmaceutical University, 7-1 Katsuraoka-cho, Otaru-city 047-0264, Japan.
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Chono S, Kaneko K, Yamamoto E, Togami K, Morimoto K. Effect of surface-mannose modification on aerosolized liposomal delivery to alveolar macrophages. Drug Dev Ind Pharm 2010; 36:102-7. [DOI: 10.3109/03639040903099744] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Dorgham K, Ghadiri A, Hermand P, Rodero M, Poupel L, Iga M, Hartley O, Gorochov G, Combadière C, Deterre P. An engineered CX3CR1 antagonist endowed with anti-inflammatory activity. J Leukoc Biol 2009; 86:903-11. [PMID: 19571253 DOI: 10.1189/jlb.0308158] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Chemokines are mainly involved in the recruitment of leukocytes into tissues, a key feature of inflammation. Through its unique receptor CX3CR1, the chemokine CX3CL1 participates in diverse inflammatory processes including arterial atherosclerosis and cerebral or renal inflammation. Using a phage display strategy, we engineered a hCX3CL1 analog (named F1) with a modified N terminus. F1 bound specifically to cells expressing hCX3CR1 and had a K(d) value close to that of native CX3CL1. F1 was not a signaling molecule and did not induce chemotaxis, calcium flux, or CX3CR1 internalization. However, it potently inhibited the CX3CL1-induced calcium flux and chemotaxis in CX3CR1-expressing primary cells of human and murine origin with an IC(50) of 5-50 nM. It also efficiently inhibited the cell adhesion mediated by the CX3CL1-CX3CR1 axis. Finally, in a noninfectious murine model of peritonitis, F1 strongly inhibited macrophage accumulation. These data reveal a prototype molecule that is the first bona fide antagonist of hCX3CR1. This molecule could be used as a lead compound for the development of a novel class of anti-inflammatory substances that act by inhibiting CX3CR1.
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Affiliation(s)
- Karim Dorgham
- INSERM UMR-S 945, UPMC Paris 6, Faculté de Médecine Pitié-Salpêtrière, Laboratoire Immunitét Infection, 75013 Paris, France
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Chelbi H, Ghadiri A, Lacheb J, Ghandil P, Hamzaoui K, Hamzaoui A, Combadiere C. A polymorphism in the CCL2 chemokine gene is associated with asthma risk: a case-control and a family study in Tunisia. Genes Immun 2008; 9:575-81. [PMID: 18615095 DOI: 10.1038/gene.2008.50] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Asthma is a complex genetic disorder characterized by chronic airway inflammation. We hypothesized that genetic polymorphisms in chemokines and their receptors alter leukocyte mobilization and may thus influence the risk and severity of childhood asthma. Distributions of the chemokine CCL2-2578G, CCL2-927C, CCR2-V64I, CX3CR1-V249I and CX3CR1-T280M receptor polymorphisms were examined in a case-control study of 121 children with asthma and 226 age-matched healthy controls and then replicated in a family study of 99 simplex families (297 individuals). The case-control study revealed that the CCL2-2578G allele was less frequent in children with than in those without asthma (P=0.0012). No association with asthma was found for the CCL2-927, CCR2 or CX3CR1 polymorphisms. The finding in the family study that the CCL2-2578G allele was transmitted less often by heterozygous parents to their children with asthma (P=0.0016) confirms the association of CCL2-2578G with asthma risk. Biochemical studies indicated that plasma CCL2 concentrations were higher in both patients (P=0.0214) and controls (P=0.001) carrying the G allele than in subjects with other polymorphisms. Both case-control and family-based studies suggest a protective effect of allele CCL2-2578G in Tunisian asthmatic children.
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Affiliation(s)
- H Chelbi
- Homeostasis and Cell Dysfunction Unit Research 99/UR/08-40, Medical University of Tunis, Tunis, Tunisia
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Combadire C, Godin O, Vidal C, Cangialosi A, Proust C, Tzourio C. Common CX3CR1 Alleles Are Associated With a Reduced Risk of Headaches. Headache 2008; 48:1061-6. [DOI: 10.1111/j.1526-4610.2007.01011.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Yucesoy B, Luster MI. Genetic susceptibility in pneumoconiosis. Toxicol Lett 2007; 168:249-54. [PMID: 17161563 DOI: 10.1016/j.toxlet.2006.10.021] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2006] [Accepted: 10/09/2006] [Indexed: 11/24/2022]
Abstract
A large number of cellular mediators such as cytokines, antioxidants and growth factors have been implicated in the pathogenesis of chronic inflammatory and fibrotic diseases. Common functional polymorphisms in these genes have been shown to influence individual susceptibility to these diseases. Silicosis, coal worker pneumoconiosis, progressive massive fibrosis and berylliosis are examples of fibrotic pneumoconiosis and are characterized by irreversible fibrotic lesions in the lung resulting from chronic dust inhalation. Although the materials are the major contributory factors of the disease pathogenesis, not all individuals exposed to similar levels develop disease. This suggests that there is a genetic predisposition to their development. Therefore, an understanding of genetic variability and the interaction between genetic and environmental factors is crucial to the identification of high-risk individuals and prevention and treatment of these diseases.
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Affiliation(s)
- Berran Yucesoy
- Toxicology and Molecular Biology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA.
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Chang LC, Tseng JC, Hua CC, Liu YC, Shieh WB, Wu HP. Gene polymorphisms of fibrinolytic enzymes in coal workers' pneumoconiosis. ARCHIVES OF ENVIRONMENTAL & OCCUPATIONAL HEALTH 2006; 61:61-6. [PMID: 17649957 DOI: 10.3200/aeoh.61.2.61-66] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The authors assessed the gene polymorphisms of missense C/T polymorphism in exon 6 of the urokinase-plasminogen activator (PLAU) gene (PLAU P141L), Alu-repeat in intron 8 of the tissue-type plasminogen activator (PLAT) gene (PLAT TPA25 Alu insertion), and 4G/5G in the promoter region of the serine proteinase inhibitor, clade E (SERPINE) or plasminogen activator inhibitor type 1 gene (SERPINE1 -675 4G/5G) in 153 healthy volunteers and 154 retired coal miners with coal miners' pneumoconiosis (CWP). The CWP subjects included 94 individuals with simple pneumoconiosis and 60 individuals with progressive massive fibrosis presenting with worse pulmonary function. The distributions of genotypes of these three genes did not differ between the control and CWP subjects or between subjects with simple pneumoconiosis and those with progressive massive fibrosis. However, by assessing duration of work and its interaction with genotypes by means of logistic regression, the authors found the missense C/T polymorphism in exon 6 of the PLAU gene to be an effect modifier of the association between work duration and the development of progressive massive fibrosis.
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Affiliation(s)
- Liang-Che Chang
- Department of Pathology, Chang Gung Memorial Hospital, Keelung and Chang Gung University, Keelung, Taiwan, Republic of China
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