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Liu JM, Luo HR. Novel neutrophil biology insights underlying atypical chemokine receptor-1/Duffy antigen receptor of chemokines-associated neutropenia. Curr Opin Hematol 2024; 31:302-306. [PMID: 39045882 PMCID: PMC11426986 DOI: 10.1097/moh.0000000000000834] [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] [Indexed: 07/25/2024]
Abstract
PURPOSE OF REVIEW Atypical chemokine receptor-1 (ACKR1)/Duffy antigen receptor of chemokines (DARC)-associated neutropenia (ADAN; OMIM 611862), previously named benign ethnic neutropenia, and present in two-thirds of individuals identifying as Black in the USA, is associated with mild to moderate decreases in peripheral neutrophil counts that nevertheless do not lead to increased infections. Consequently, recent initiatives have sought to establish normal neutrophil count reference ranges for ADAN, considering it a normal variant rather than a clinical disorder requiring medical intervention. RECENT FINDINGS A limited number of studies elucidating the mechanism of neutropenia in ADAN has suggested that neutrophils may redistribute from peripheral blood to the tissues including the spleen: this might explain why ADAN is not associated with increased risks of infection since the total number of neutrophils in the body remains normal. In this review, we critically examine the research underlying the molecular basis of ADAN. SUMMARY Insights into the biology of neutrophils and their trafficking may inform the clinical interpretation of neutropenia in ADAN. The bulk of research suggests that ADAN does not lead to a diminished host defense as do other forms of neutropenia. However, ADAN may lead to increased proinflammatory signaling, with possible implications for senescence of the immune system and predisposition to autoimmunity and cancer.
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Affiliation(s)
- Johnson M. Liu
- Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, New York
| | - Hongbo R. Luo
- Harvard Medical School and Mass General Brigham, Boston, Massachusetts, USA
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2
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Dechavanne C, Dechavanne S, Bosch J, Metral S, Redinger KR, Watson QD, Ratsimbasoa AC, Roeper B, Krishnan S, Fong R, Bennett S, Carias L, Chen E, Salinas ND, Ghosh A, Tolia NH, Woost PG, Jacobberger JW, Colin Y, Gamain B, King CL, Zimmerman PA. Duffy antigen is expressed during erythropoiesis in Duffy-negative individuals. Cell Host Microbe 2023; 31:2093-2106.e7. [PMID: 38056457 PMCID: PMC10843566 DOI: 10.1016/j.chom.2023.10.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 09/14/2023] [Accepted: 10/31/2023] [Indexed: 12/08/2023]
Abstract
The erythrocyte silent Duffy blood group phenotype in Africans is thought to confer resistance to Plasmodium vivax blood-stage infection. However, recent studies report P. vivax infections across Africa in Fy-negative individuals. This suggests that the globin transcription factor 1 (GATA-1) SNP underlying Fy negativity does not entirely abolish Fy expression or that P. vivax has developed a Fy-independent red blood cell (RBC) invasion pathway. We show that RBCs and erythroid progenitors from in vitro differentiated CD34 cells and from bone marrow aspirates from Fy-negative samples express a functional Fy on their surface. This suggests that the GATA-1 SNP does not entirely abolish Fy expression. Given these results, we developed an in vitro culture system for P. vivax and show P. vivax can invade erythrocytes from Duffy-negative individuals. This study provides evidence that Fy is expressed in Fy-negative individuals and explains their susceptibility to P. vivax with major implications and challenges for P. vivax malaria eradication.
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Affiliation(s)
- Celia Dechavanne
- Center for Global Health & Disease, Case Western Reserve University, Cleveland, OH, USA
| | - Sebastien Dechavanne
- Center for Global Health & Disease, Case Western Reserve University, Cleveland, OH, USA
| | - Jürgen Bosch
- Center for Global Health & Disease, Case Western Reserve University, Cleveland, OH, USA; InterRayBio, LLC, Cleveland, OH, USA
| | - Sylvain Metral
- Université Paris Cité and Université des Antilles, INSERM, BIGR, 75015 Paris, France
| | - Karli R Redinger
- Center for Global Health & Disease, Case Western Reserve University, Cleveland, OH, USA
| | - Quentin D Watson
- Center for Global Health & Disease, Case Western Reserve University, Cleveland, OH, USA
| | - Arsene C Ratsimbasoa
- University of Fianarantsoa, Fianarantsoa, Madagascar; CNARP (Centre National d'Application de Recherche Pharmaceutique), Antananarivo, Madagascar
| | - Brooke Roeper
- Center for Global Health & Disease, Case Western Reserve University, Cleveland, OH, USA
| | - Sushma Krishnan
- Center for Global Health & Disease, Case Western Reserve University, Cleveland, OH, USA
| | - Rich Fong
- Center for Global Health & Disease, Case Western Reserve University, Cleveland, OH, USA
| | - Seth Bennett
- Center for Global Health & Disease, Case Western Reserve University, Cleveland, OH, USA
| | - Lenore Carias
- Center for Global Health & Disease, Case Western Reserve University, Cleveland, OH, USA
| | - Edwin Chen
- Division of Infectious Diseases, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Nichole D Salinas
- Host-Pathogen Interactions and Structural Vaccinology Section, Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Anil Ghosh
- Center for Global Health & Disease, Case Western Reserve University, Cleveland, OH, USA
| | - Niraj H Tolia
- Host-Pathogen Interactions and Structural Vaccinology Section, Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Philip G Woost
- Case Comprehensive Cancer Center Flow Cytometry Core, Case Western Reserve University, Cleveland, OH, USA
| | - James W Jacobberger
- Case Comprehensive Cancer Center Flow Cytometry Core, Case Western Reserve University, Cleveland, OH, USA
| | - Yves Colin
- Université Paris Cité and Université des Antilles, INSERM, BIGR, 75015 Paris, France
| | - Benoit Gamain
- Université Paris Cité and Université des Antilles, INSERM, BIGR, 75015 Paris, France.
| | - Christopher L King
- Center for Global Health & Disease, Case Western Reserve University, Cleveland, OH, USA; Veterans Affairs Research Service, Cleveland, OH, USA.
| | - Peter A Zimmerman
- Center for Global Health & Disease, Case Western Reserve University, Cleveland, OH, USA.
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3
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Crawford KS, Volkman BF. Prospects for targeting ACKR1 in cancer and other diseases. Front Immunol 2023; 14:1111960. [PMID: 37006247 PMCID: PMC10050359 DOI: 10.3389/fimmu.2023.1111960] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 03/03/2023] [Indexed: 03/17/2023] Open
Abstract
The chemokine network is comprised of a family of signal proteins that encode messages for cells displaying chemokine G-protein coupled receptors (GPCRs). The diversity of effects on cellular functions, particularly directed migration of different cell types to sites of inflammation, is enabled by different combinations of chemokines activating signal transduction cascades on cells displaying a combination of receptors. These signals can contribute to autoimmune disease or be hijacked in cancer to stimulate cancer progression and metastatic migration. Thus far, three chemokine receptor-targeting drugs have been approved for clinical use: Maraviroc for HIV, Plerixafor for hematopoietic stem cell mobilization, and Mogalizumab for cutaneous T-cell lymphoma. Numerous compounds have been developed to inhibit specific chemokine GPCRs, but the complexity of the chemokine network has precluded more widespread clinical implementation, particularly as anti-neoplastic and anti-metastatic agents. Drugs that block a single signaling axis may be rendered ineffective or cause adverse reactions because each chemokine and receptor often have multiple context-specific functions. The chemokine network is tightly regulated at multiple levels, including by atypical chemokine receptors (ACKRs) that control chemokine gradients independently of G-proteins. ACKRs have numerous functions linked to chemokine immobilization, movement through and within cells, and recruitment of alternate effectors like β-arrestins. Atypical chemokine receptor 1 (ACKR1), previously known as the Duffy antigen receptor for chemokines (DARC), is a key regulator that binds chemokines involved in inflammatory responses and cancer proliferation, angiogenesis, and metastasis. Understanding more about ACKR1 in different diseases and populations may contribute to the development of therapeutic strategies targeting the chemokine network.
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Affiliation(s)
- Kyler S. Crawford
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI, United States
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4
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Multiethnic genome-wide and HLA association study of total serum IgE level. J Allergy Clin Immunol 2021; 148:1589-1595. [PMID: 34536413 PMCID: PMC8665111 DOI: 10.1016/j.jaci.2021.09.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 07/26/2021] [Accepted: 09/01/2021] [Indexed: 11/20/2022]
Abstract
BACKGROUND Total serum IgE (tIgE) is an important intermediate phenotype of allergic disease. Whole genome genetic association studies across ancestries may identify important determinants of IgE. OBJECTIVE We aimed to increase understanding of genetic variants affecting tIgE production across the ancestry and allergic disease spectrum by leveraging data from the National Heart, Lung and Blood Institute Trans-Omics for Precision Medicine program; the Consortium on Asthma among African-ancestry Populations in the Americas (CAAPA); and the Atopic Dermatitis Research Network (N = 21,901). METHODS We performed genome-wide association within strata of study, disease, and ancestry groups, and we combined results via a meta-regression approach that models heterogeneity attributable to ancestry. We also tested for association between HLA alleles called from whole genome sequence data and tIgE, assessing replication of associations in HLA alleles called from genotype array data. RESULTS We identified 6 loci at genome-wide significance (P < 5 × 10-9), including 4 loci previously reported as genome-wide significant for tIgE, as well as new regions in chr11q13.5 and chr15q22.2, which were also identified in prior genome-wide association studies of atopic dermatitis and asthma. In the HLA allele association study, HLA-A∗02:01 was associated with decreased tIgE level (Pdiscovery = 2 × 10-4; Preplication = 5 × 10-4; Pdiscovery+replication = 4 × 10-7), and HLA-DQB1∗03:02 was strongly associated with decreased tIgE level in Hispanic/Latino ancestry populations (PHispanic/Latino discovery+replication = 8 × 10-8). CONCLUSION We performed the largest genome-wide association study and HLA association study of tIgE focused on ancestrally diverse populations and found several known tIgE and allergic disease loci that are relevant in non-European ancestry populations.
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Abstract
PURPOSE OF REVIEW Precision medicine could help to improve diagnosis and treatment of asthma; however, in the tropics there are special conditions to be considered for applying this strategy. In this review, we analyze recent advances of precision allergology in tropical regions, highlighting its limitations and needs in high-admixed populations living under environments with high exposure to house dust mites and helminth infections. RECENT FINDINGS Advances have been made regarding the genetic characterization of the great diversity of populations living in the tropics. Genes involved in shared biological pathways between immune responses to nematodes and the allergic responses suggested new mechanisms of predisposition. Genome wide association studies of asthma are progressively focusing on some highly replicated genes such as those in chromosome 17q31-13, which have been also replicated in African ancestry populations. Some diagnostic difficulties, because of the endemicity of helminth infections, are now more evident in the context of phenotype definition. SUMMARY The clinical impact of the advances in precision medicine for asthma in the tropics is still limited and mainly related to component resolved diagnosis. More basic and clinical research is needed to identify genetic, epigenetic, or other biologic markers that allow and accurate definition of phenotypes and endotypes of this heterogeneous disease. This will substantially improve the selection of personalized treatments.
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Roberts G, Almqvist C, Boyle R, Crane J, Hogan SP, Marsland B, Saglani S, Woodfolk JA. Developments in the field of allergy in 2017 through the eyes of Clinical and Experimental Allergy. Clin Exp Allergy 2019; 48:1606-1621. [PMID: 30489681 DOI: 10.1111/cea.13318] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In this article, we described the development in the field of allergy as described by Clinical and Experimental Allergy in 2017. Experimental models of allergic disease, basic mechanisms, clinical mechanisms, allergens, asthma and rhinitis and clinical allergy are all covered.
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Affiliation(s)
- G Roberts
- Faculty of Medicine, Clinical and Experimental Sciences and Human Development and Health, University of Southampton, Southampton, UK.,NIHR Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust, Southampton, UK.,The David Hide Asthma and Allergy Research Centre, St Mary's Hospital, Isle of Wight, UK
| | - C Almqvist
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.,Pediatric Allergy and Pulmonology Unit at Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden
| | - R Boyle
- Department of Paediatrics, Imperial College London, London, UK
| | - J Crane
- Department of Medicine, University of Otago Wellington, Wellington, New Zealand
| | - S P Hogan
- Mary H Weiser Food Allergy Center, Department of Pathology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan
| | - B Marsland
- Department of Immunology and Pathology, Monash University, Melbourne, Victoria, Australia
| | - S Saglani
- National Heart & Lung Institute, Imperial College London, London, UK
| | - J A Woodfolk
- Division of Asthma, Allergy and Immunology, Department of Medicine, University of Virginia School of Medicine, Charlottesville, Virginia
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7
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Acevedo N, Zakzuk J, Caraballo L. House Dust Mite Allergy Under Changing Environments. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2019; 11:450-469. [PMID: 31172715 PMCID: PMC6557771 DOI: 10.4168/aair.2019.11.4.450] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 03/12/2019] [Accepted: 03/15/2019] [Indexed: 12/11/2022]
Abstract
Environmental variations induced by industrialization and climate change partially explain the increase in prevalence and severity of allergic disease. One possible mechanism is the increase in allergen production leading to more exposure and sensitization in susceptible individuals. House dust mites (HDMs) are important sources of allergens inducing asthma and rhinitis, and experimentally they have been demonstrated to be very sensitive to microenvironment modifications; therefore, global or regional changes in temperature, humidity, air pollution or other environmental conditions could modify natural HDM growth, survival and allergen production. There is evidence that sensitization to HDMs has increased in some regions of the world, especially in the subtropical and tropical areas; however, the relationship of this increase with environmental changes is not so clear as has reported for pollen allergens. In this review, we address this point and explore the effects of current and predicted environmental changes on HDM growth, survival and allergen production, which could lead to immunoglobulin E (IgE) sensitization and allergic disease prevalence. We also assess the role of adjuvants of IgE responses, such as air pollution and helminth infections, and discuss the genetic and epigenetic aspects that could influence the adaptive process of humans to drastic and relatively recent environmental changes we are experiencing.
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Affiliation(s)
- Nathalie Acevedo
- Institute for Immunological Research, University of Cartagena, Cartagena de Indias, Colombia
| | - Josefina Zakzuk
- Institute for Immunological Research, University of Cartagena, Cartagena de Indias, Colombia
| | - Luis Caraballo
- Institute for Immunological Research, University of Cartagena, Cartagena de Indias, Colombia.
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8
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Chapman DG, Mougey EB, Van der Velden JL, Lahue KG, Aliyeva M, Daphtary N, George KL, Hoffman SM, Schneider RW, Tracy RP, Worthen GS, Poynter ME, Peters SP, Lima JJ, Janssen-Heininger YMW, Irvin CG. The Duffy antigen receptor for chemokines regulates asthma pathophysiology. Clin Exp Allergy 2017; 47:1214-1222. [PMID: 28471517 PMCID: PMC5578916 DOI: 10.1111/cea.12949] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 03/21/2017] [Accepted: 03/27/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND The Duffy antigen receptor for chemokines (DARC) is an atypical receptor that regulates pro-inflammatory cytokines. However, the role of DARC in asthma pathophysiology is unknown. OBJECTIVE To determine the role of DARC in allergic airways disease in mice, and the association between DARC single nucleotide polymorphisms (SNPs) and clinical outcomes in patients with asthma. METHODS Mice with targeted disruption of the Darc gene (Darc∆E2 ) or WT mice were challenged over 3 weeks with house dust mite (HDM) antigen. Allergic airways disease was assessed 24 hours and 7 days following the final challenge. Additionally, associations between DARC SNPs and clinical outcomes were analysed in a cohort of poorly controlled asthmatics. RESULTS Total airway inflammation following HDM did not differ between Darc∆E2 and WT mice. At 24 hours, Darc∆E2 mice had increased airway hyperresponsiveness; however, at 7 days airway hyperresponsiveness had completely resolved in Darc∆E2 but persisted in WT mice. In poorly controlled asthmatics, DARC SNPs were associated with worse asthma control at randomization and subsequent increased risk of healthcare utilization (odds ratio 3.13(1.37-7.27), P=.0062). CONCLUSIONS AND CLINICAL RELEVANCE Our animal model and human patient data suggest a novel role for DARC in the temporal regulation in asthma pathophysiology and symptoms.
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Affiliation(s)
- D G Chapman
- Department of Medicine, University of Vermont College of Medicine, Burlington, VT, USA
- Woolcock Institute of Medical Research, Sydney Medical School, University of Sydney, Sydney, NSW, Australia
| | - E B Mougey
- Nemours Pharmacogenetics Center, Nemours Children's Clinic, Jacksonville, FL, USA
| | - J L Van der Velden
- Department of Pathology, University of Vermont College of Medicine, Burlington, VT, USA
| | - K G Lahue
- Department of Pathology, University of Vermont College of Medicine, Burlington, VT, USA
| | - M Aliyeva
- Department of Medicine, University of Vermont College of Medicine, Burlington, VT, USA
| | - N Daphtary
- Department of Medicine, University of Vermont College of Medicine, Burlington, VT, USA
| | - K L George
- Nemours Pharmacogenetics Center, Nemours Children's Clinic, Jacksonville, FL, USA
| | - S M Hoffman
- Department of Pathology, University of Vermont College of Medicine, Burlington, VT, USA
| | - R W Schneider
- Department of Pathology, University of Vermont College of Medicine, Burlington, VT, USA
| | - R P Tracy
- Department of Medicine, University of Vermont College of Medicine, Burlington, VT, USA
- Department of Biochemistry, University of Vermont College of Medicine, Burlington, VT, USA
| | - G S Worthen
- Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA, USA
| | - M E Poynter
- Department of Medicine, University of Vermont College of Medicine, Burlington, VT, USA
| | - S P Peters
- Section on Pulmonary, Critical Care, Allergy & Immunologic Diseases, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - J J Lima
- Nemours Pharmacogenetics Center, Nemours Children's Clinic, Jacksonville, FL, USA
| | | | - C G Irvin
- Department of Medicine, University of Vermont College of Medicine, Burlington, VT, USA
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9
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Impact of genetic polymorphisms determining leukocyte/neutrophil count on chemotherapy toxicity. THE PHARMACOGENOMICS JOURNAL 2017; 18:270-274. [DOI: 10.1038/tpj.2017.16] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 02/23/2017] [Accepted: 03/02/2017] [Indexed: 12/22/2022]
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10
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Roche B, Rougeron V, Quintana-Murci L, Renaud F, Abbate JL, Prugnolle F. Might Interspecific Interactions between Pathogens Drive Host Evolution? The Case of Plasmodium Species and Duffy-Negativity in Human Populations. Trends Parasitol 2017; 33:21-29. [DOI: 10.1016/j.pt.2016.09.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 09/06/2016] [Accepted: 09/23/2016] [Indexed: 12/27/2022]
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Ntumngia FB, Thomson-Luque R, Pires CV, Adams JH. The role of the human Duffy antigen receptor for chemokines in malaria susceptibility: current opinions and future treatment prospects. JOURNAL OF RECEPTOR, LIGAND AND CHANNEL RESEARCH 2016; 9:1-11. [PMID: 28943755 PMCID: PMC5608092 DOI: 10.2147/jrlcr.s99725] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The Duffy antigen receptor for chemokine (DARC) is a nonspecific receptor for several proinflammatory cytokines. It is homologous to the G-protein chemokine receptor superfamily, which is suggested to function as a scavenger in many inflammatory-and proinflammatory-related diseases. G-protein chemokine receptors are also known to play a critical role in infectious diseases; they are commonly used as entry vehicles by infectious agents. A typical example is the chemokine receptor CCR5 or CXCR4 used by HIV for infecting target cells. In malaria, DARC is considered an essential receptor that mediates the entry of the human and zoonotic malaria parasites Plasmodium vivax and Plasmodium knowlesi into human reticulocytes and erythrocytes, respectively. This process is mediated through interaction with the parasite ligand known as the Duffy binding protein (DBP). Most therapeutic strategies have been focused on blocking the interaction between DBP and DARC by targeting the parasite ligand, while strategies targeting the receptor, DARC, have not been intensively investigated. The rapid increase in drug resistance and the lack of new effective drugs or a vaccine for malaria constitute a major threat and a need for novel therapeutics to combat disease. This review explores strategies that can be used to target the receptor. Inhibitors of DARC, which block DBP-DARC interaction, can potentially provide an effective strategy for preventing malaria caused by P. vivax.
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Affiliation(s)
- Francis B Ntumngia
- Department of Global Health, College of Public Health, University of South Florida, Tampa, FL, USA
| | - Richard Thomson-Luque
- Department of Global Health, College of Public Health, University of South Florida, Tampa, FL, USA
| | - Camilla V Pires
- Department of Global Health, College of Public Health, University of South Florida, Tampa, FL, USA
| | - John H Adams
- Department of Global Health, College of Public Health, University of South Florida, Tampa, FL, USA
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Caraballo L, Zakzuk J, Lee BW, Acevedo N, Soh JY, Sánchez-Borges M, Hossny E, García E, Rosario N, Ansotegui I, Puerta L, Sánchez J, Cardona V. Particularities of allergy in the Tropics. World Allergy Organ J 2016; 9:20. [PMID: 27386040 PMCID: PMC4924335 DOI: 10.1186/s40413-016-0110-7] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 05/25/2016] [Indexed: 12/27/2022] Open
Abstract
Allergic diseases are distributed worldwide and their risk factors and triggers vary according to geographical and socioeconomic conditions. Allergies are frequent in the Tropics but aspects of their prevalence, natural history, risk factors, sensitizers and triggers are not well defined and some are expected to be different from those in temperate zone countries. The aim of this review is to investigate if allergic diseases in the Tropics have particularities that deserve special attention for research and clinical practice. Such information will help to form a better understanding of the pathogenesis, diagnosis and management of allergic diseases in the Tropics. As expected, we found particularities in the Tropics that merit further study because they strongly affect the natural history of common allergic diseases; most of them related to climate conditions that favor permanent exposure to mite allergens, helminth infections and stinging insects. In addition, we detected several unmet needs in important areas which should be investigated and solved by collaborative efforts led by the emergent research groups on allergy from tropical countries.
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Affiliation(s)
- Luis Caraballo
- />Institute for Immunological Research, University of Cartagena, Cra. 5 # 7-77, Cartagena, Colombia
| | - Josefina Zakzuk
- />Institute for Immunological Research, University of Cartagena, Cra. 5 # 7-77, Cartagena, Colombia
| | - Bee Wah Lee
- />Khoo Teck Puat- National University Children’s Medical Institute, National University Health System, Singapore, Singapore
- />Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Nathalie Acevedo
- />Department of Medicine Solna, Karolinska Institutet, Translational Immunology Unit, Stockholm, Sweden
| | - Jian Yi Soh
- />Khoo Teck Puat- National University Children’s Medical Institute, National University Health System, Singapore, Singapore
- />Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Mario Sánchez-Borges
- />Allergy and Clinical Immunology Department, Centro Médico- Docente La Trinidad and Clínica El Avila, Caracas, Venezuela
| | - Elham Hossny
- />Pediatric Allergy and Immunology Unit, Children’s Hospital, Ain Shams University, Cairo, Egypt
| | - Elizabeth García
- />Allergy Section, Fundación Santa Fe de Bogotá, Faculty of Medicine, Universidad de los Andes, Bogotá, Colombia
| | - Nelson Rosario
- />Federal University of Parana, Rua General Carneiro, Curitiba, Brazil
| | - Ignacio Ansotegui
- />Department of Allergy and Immunology, Hospital Quirón Bizkaia, Bilbao, Spain
| | - Leonardo Puerta
- />Institute for Immunological Research, University of Cartagena, Cra. 5 # 7-77, Cartagena, Colombia
| | - Jorge Sánchez
- />Department of Pediatrics, Graduate Program on Allergology, University of Antioquia, Medellín, Colombia
| | - Victoria Cardona
- />Allergy Section, Department of Internal Medicine, Hospital Vall d’Hebron, Barcelona, Spain
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Ponomarenko MP, Arkova O, Rasskazov D, Ponomarenko P, Savinkova L, Kolchanov N. Candidate SNP Markers of Gender-Biased Autoimmune Complications of Monogenic Diseases Are Predicted by a Significant Change in the Affinity of TATA-Binding Protein for Human Gene Promoters. Front Immunol 2016; 7:130. [PMID: 27092142 PMCID: PMC4819121 DOI: 10.3389/fimmu.2016.00130] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 03/21/2016] [Indexed: 12/17/2022] Open
Abstract
Some variations of human genome [for example, single nucleotide polymorphisms (SNPs)] are markers of hereditary diseases and drug responses. Analysis of them can help to improve treatment. Computer-based analysis of millions of SNPs in the 1000 Genomes project makes a search for SNP markers more targeted. Here, we combined two computer-based approaches: DNA sequence analysis and keyword search in databases. In the binding sites for TATA-binding protein (TBP) in human gene promoters, we found candidate SNP markers of gender-biased autoimmune diseases, including rs1143627 [cachexia in rheumatoid arthritis (double prevalence among women)]; rs11557611 [demyelinating diseases (thrice more prevalent among young white women than among non-white individuals)]; rs17231520 and rs569033466 [both: atherosclerosis comorbid with related diseases (double prevalence among women)]; rs563763767 [Hughes syndrome-related thrombosis (lethal during pregnancy)]; rs2814778 [autoimmune diseases (excluding multiple sclerosis and rheumatoid arthritis) underlying hypergammaglobulinemia in women]; rs72661131 and rs562962093 (both: preterm delivery in pregnant diabetic women); and rs35518301, rs34166473, rs34500389, rs33981098, rs33980857, rs397509430, rs34598529, rs33931746, rs281864525, and rs63750953 (all: autoimmune diseases underlying hypergammaglobulinemia in women). Validation of these predicted candidate SNP markers using the clinical standards may advance personalized medicine.
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Affiliation(s)
- Mikhail P. Ponomarenko
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - Olga Arkova
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
| | - Dmitry Rasskazov
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
| | | | - Ludmila Savinkova
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
| | - Nikolay Kolchanov
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
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Zabel BA, Rott A, Butcher EC. Leukocyte chemoattractant receptors in human disease pathogenesis. ANNUAL REVIEW OF PATHOLOGY-MECHANISMS OF DISEASE 2014; 10:51-81. [PMID: 25387059 DOI: 10.1146/annurev-pathol-012513-104640] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Combinations of leukocyte attractant ligands and cognate heptahelical receptors specify the systemic recruitment of circulating cells by triggering integrin-dependent adhesion to endothelial cells, supporting extravasation, and directing specific intratissue localization via gradient-driven chemotaxis. Chemoattractant receptors also control leukocyte egress from lymphoid organs and peripheral tissues. In this article, we summarize the fundamental mechanics of leukocyte trafficking, from the evolution of multistep models of leukocyte recruitment and navigation to the regulation of chemoattractant availability and function by atypical heptahelical receptors. To provide a more complete picture of the migratory circuits involved in leukocyte trafficking, we integrate a number of nonchemokine chemoattractant receptors into our discussion. Leukocyte chemoattractant receptors play key roles in the pathogenesis of autoimmune diseases, allergy, inflammatory disorders, and cancer. We review recent advances in our understanding of chemoattractant receptors in disease pathogenesis, with a focus on genome-wide association studies in humans and the translational implications of mechanistic studies in animal disease models.
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Affiliation(s)
- Brian A Zabel
- Palo Alto Veterans Institute for Research and Veterans Affairs Palo Alto Health Care System, Palo Alto, California 94304;
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15
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Al-Alwan LA, Chang Y, Rousseau S, Martin JG, Eidelman DH, Hamid Q. CXCL1 inhibits airway smooth muscle cell migration through the decoy receptor Duffy antigen receptor for chemokines. THE JOURNAL OF IMMUNOLOGY 2014; 193:1416-26. [PMID: 24981451 DOI: 10.4049/jimmunol.1302860] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Airway smooth muscle cell (ASMC) migration is an important mechanism postulated to play a role in airway remodeling in asthma. CXCL1 chemokine has been linked to tissue growth and metastasis. In this study, we present a detailed examination of the inhibitory effect of CXCL1 on human primary ASMC migration and the role of the decoy receptor, Duffy AgR for chemokines (DARC), in this inhibition. Western blots and pathway inhibitors showed that this phenomenon was mediated by activation of the ERK-1/2 MAPK pathway, but not p38 MAPK or PI3K, suggesting a biased selection in the signaling mechanism. Despite being known as a nonsignaling receptor, small interference RNA knockdown of DARC showed that ERK-1/2 MAPK activation was significantly dependent on DARC functionality, which, in turn, was dependent on the presence of heat shock protein 90 subunit α. Interestingly, DARC- or heat shock protein 90 subunit α-deficient ASMCs responded to CXCL1 stimulation by enhancing p38 MAPK activation and ASMC migration through the CXCR2 receptor. In conclusion, we demonstrated DARC's ability to facilitate CXCL1 inhibition of ASMC migration through modulation of the ERK-1/2 MAPK-signaling pathway.
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Affiliation(s)
- Laila A Al-Alwan
- Meakins-Christie Laboratories, Respiratory Division, Department of Medicine, McGill University, Montreal, Quebec H2X 2P2, Canada
| | - Ying Chang
- Meakins-Christie Laboratories, Respiratory Division, Department of Medicine, McGill University, Montreal, Quebec H2X 2P2, Canada
| | - Simon Rousseau
- Meakins-Christie Laboratories, Respiratory Division, Department of Medicine, McGill University, Montreal, Quebec H2X 2P2, Canada
| | - James G Martin
- Meakins-Christie Laboratories, Respiratory Division, Department of Medicine, McGill University, Montreal, Quebec H2X 2P2, Canada
| | - David H Eidelman
- Meakins-Christie Laboratories, Respiratory Division, Department of Medicine, McGill University, Montreal, Quebec H2X 2P2, Canada
| | - Qutayba Hamid
- Meakins-Christie Laboratories, Respiratory Division, Department of Medicine, McGill University, Montreal, Quebec H2X 2P2, Canada
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Allergic diseases: the price of civilisational progress. Postepy Dermatol Alergol 2014; 31:77-83. [PMID: 25097472 PMCID: PMC4112251 DOI: 10.5114/pdia.2014.40936] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Revised: 09/26/2013] [Accepted: 09/28/2013] [Indexed: 12/22/2022] Open
Abstract
Atopic disorders are a major global health problem. The prevalence of asthma, allergic rhinitis and atopic dermatitis has been increasing over the last four decades, both in the industrialized and developing countries. It seems to be related to changes in the social structure, increasing industrialization, pollution and dietary changes. Many hypotheses link the allergy epidemic to stringent hygiene, dominance of a westernized lifestyle and an accelerated pace of life. Dietary antioxidants, lipids, sodium, vitamin D seem also to be implicated. We endeavour to review the most relevant theories with a special emphasis on the hygiene, antioxidative, lipid and air pollution hypotheses. It is however important to note that none of them explains all the aspects of unprecedented rise in the prevalence of allergic disorders. A complex interplay between host's immune response, invading pathogens, diversity of environmental factors and genetic background seems to be of a particular importance. Current allergy epidemic is multifactorial and basic and epidemiologic studies are warranted to further our understanding of this phenomenon.
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Vergara C, Murray T, Rafaels N, Lewis R, Campbell M, Foster C, Gao L, Faruque M, Oliveira RR, Carvalho E, Araujo MI, Cruz AA, Watson H, Mercado D, Knight-Madden J, Ruczinski I, Dunston G, Ford J, Caraballo L, Beaty TH, Mathias RA, Barnes KC. African ancestry is a risk factor for asthma and high total IgE levels in African admixed populations. Genet Epidemiol 2013; 37:393-401. [PMID: 23554133 DOI: 10.1002/gepi.21702] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 11/21/2012] [Accepted: 11/22/2012] [Indexed: 12/16/2022]
Abstract
Characterization of genetic admixture of populations in the Americas and the Caribbean is of interest for anthropological, epidemiological, and historical reasons. Asthma has a higher prevalence and is more severe in populations with a high African component. Association of African ancestry with asthma has been demonstrated. We estimated admixture proportions of samples from six trihybrid populations of African descent and determined the relationship between African ancestry and asthma and total serum IgE levels (tIgE). We genotyped 237 ancestry informative markers in asthmatics and nonasthmatic controls from Barbados (190/277), Jamaica (177/529), Brazil (40/220), Colombia (508/625), African Americans from New York (207/171), and African Americans from Baltimore/Washington, D.C. (625/757). We estimated individual ancestries and evaluated genetic stratification using Structure and principal component analysis. Association of African ancestry and asthma and tIgE was evaluated by regression analysis. Mean ± SD African ancestry ranged from 0.76 ± 0.10 among Barbadians to 0.33 ± 0.13 in Colombians. The European component varied from 0.14 ± 0.05 among Jamaicans and Barbadians to 0.26 ± 0.08 among Colombians. African ancestry was associated with risk for asthma in Colombians (odds ratio (OR) = 4.5, P = 0.001) Brazilians (OR = 136.5, P = 0.003), and African Americans of New York (OR: 4.7; P = 0.040). African ancestry was also associated with higher tIgE levels among Colombians (β = 1.3, P = 0.04), Barbadians (β = 3.8, P = 0.03), and Brazilians (β = 1.6, P = 0.03). Our findings indicate that African ancestry can account for, at least in part, the association between asthma and its associated trait, tIgE levels.
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Affiliation(s)
- Candelaria Vergara
- Division of Allergy and Clinical Immunology, Department of Medicine, Johns Hopkins University (JHU), Baltimore, MD, USA
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Zimmerman PA, Ferreira MU, Howes RE, Mercereau-Puijalon O. Red blood cell polymorphism and susceptibility to Plasmodium vivax. ADVANCES IN PARASITOLOGY 2013; 81:27-76. [PMID: 23384621 PMCID: PMC3728992 DOI: 10.1016/b978-0-12-407826-0.00002-3] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Resistance to Plasmodium vivax blood-stage infection has been widely recognised to result from absence of the Duffy (Fy) blood group from the surface of red blood cells (RBCs) in individuals of African descent. Interestingly, recent studies from different malaria-endemic regions have begun to reveal new perspectives on the association between Duffy gene polymorphism and P. vivax malaria. In Papua New Guinea and the Americas, heterozygous carriers of a Duffy-negative allele are less susceptible to P. vivax infection than Duffy-positive homozygotes. In Brazil, studies show that the Fy(a) antigen, compared to Fy(b), is associated with lower binding to the P. vivax Duffy-binding protein and reduced susceptibility to vivax malaria. Additionally, it is interesting that numerous studies have now shown that P. vivax can infect RBCs and cause clinical disease in Duffy-negative people. This suggests that the relationship between P. vivax and the Duffy antigen is more complex than customarily described. Evidence of P. vivax Duffy-independent red cell invasion indicates that the parasite must be evolving alternative red cell invasion pathways. In this chapter, we review the evidence for P. vivax Duffy-dependent and Duffy-independent red cell invasion. We also consider the influence of further host gene polymorphism associated with malaria endemicity on susceptibility to vivax malaria. The interaction between the parasite and the RBC has significant potential to influence the effectiveness of P. vivax-specific vaccines and drug treatments. Ultimately, the relationships between red cell polymorphisms and P. vivax blood-stage infection will influence our estimates on the population at risk and efforts to eliminate vivax malaria.
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Affiliation(s)
- Peter A Zimmerman
- Center for Global Health & Diseases, Case Western Reserve University, Cleveland, Ohio, USA.
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Levin AM, Mathias RA, Huang L, Roth LA, Daley D, Myers RA, Himes BE, Romieu I, Yang M, Eng C, Park JE, Zoratti K, Gignoux CR, Torgerson DG, Galanter JM, Huntsman S, Nguyen EA, Becker AB, Chan-Yeung M, Kozyrskyj AL, Kwok PY, Gilliland FD, Gauderman WJ, Bleecker ER, Raby BA, Meyers DA, London SJ, Martinez FD, Weiss ST, Burchard EG, Nicolae DL, Ober C, Barnes KC, Williams LK. A meta-analysis of genome-wide association studies for serum total IgE in diverse study populations. J Allergy Clin Immunol 2012; 131:1176-84. [PMID: 23146381 DOI: 10.1016/j.jaci.2012.10.002] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Revised: 09/28/2012] [Accepted: 10/02/2012] [Indexed: 01/27/2023]
Abstract
BACKGROUND IgE is both a marker and mediator of allergic inflammation. Despite reported differences in serum total IgE levels by race-ethnicity, African American and Latino subjects have not been well represented in genetic studies of total IgE. OBJECTIVE We sought to identify the genetic predictors of serum total IgE levels. METHODS We used genome-wide association data from 4292 subjects (2469 African Americans, 1564 European Americans, and 259 Latinos) in the EVE Asthma Genetics Consortium. Tests for association were performed within each cohort by race-ethnic group (ie, African American, Latino, and European American) and asthma status. The resulting P values were meta-analyzed, accounting for sample size and direction of effect. Top single nucleotide polymorphism associations from the meta-analysis were reassessed in 6 additional cohorts comprising 5767 subjects. RESULTS We identified 10 unique regions in which the combined association statistic was associated with total serum IgE levels (P<5.0×10(-6)) and the minor allele frequency was 5% or greater in 2 or more population groups. Variant rs9469220, corresponding to HLA-DQB1, was the single nucleotide polymorphism most significantly associated with serum total IgE levels when assessed in both the replication cohorts and the discovery and replication sets combined (P=.007 and 2.45×10(-7), respectively). In addition, findings from earlier genome-wide association studies were also validated in the current meta-analysis. CONCLUSION This meta-analysis independently identified a variant near HLA-DQB1 as a predictor of total serum IgE levels in multiple race-ethnic groups. This study also extends and confirms the findings of earlier genome-wide association analyses in African American and Latino subjects.
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Affiliation(s)
- Albert M Levin
- Department of Public Health Sciences, Henry Ford Health System, Detroit, MI, USA
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Graham GJ, Locati M, Mantovani A, Rot A, Thelen M. The biochemistry and biology of the atypical chemokine receptors. Immunol Lett 2012; 145:30-8. [PMID: 22698181 DOI: 10.1016/j.imlet.2012.04.004] [Citation(s) in RCA: 129] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Accepted: 04/13/2012] [Indexed: 01/13/2023]
Abstract
A subset of chemokine receptors, initially called "silent" on the basis of their apparent failure to activate conventional signalling events, has recently attracted growing interest due to their ability to internalize, degrade, or transport ligands and thus modify gradients and create functional chemokine patterns in tissues. These receptors recognize distinct and complementary sets of ligands with high affinity, are strategically expressed in different cellular contexts, and lack structural determinants supporting Gα(i) activation, a key signalling event in cell migration. This is in keeping with the hypothesis that they have evolved to fulfil fundamentally different functions to the classical signalling chemokine receptors. Based on these considerations, these receptors (D6, Duffy antigen receptor for chemokines (DARC), CCX-CKR1 and CXCR7) are now collectively considered as an emerging class of 'atypical' chemokine receptors. In this article, we review the biochemistry and biology of this emerging chemokine receptor subfamily.
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Affiliation(s)
- G J Graham
- Institute of Infection, Immunity and Inflammation, Glasgow Biomedical Research Centre, University of Glasgow, Glasgow G12 8TA, UK.
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21
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Reilly JP, Christie JD. The Darc side of glycobiology in acute lung injury. Chest 2012; 141:1132-1134. [PMID: 22553256 DOI: 10.1378/chest.12-0179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Affiliation(s)
- John P Reilly
- Division of Pulmonary, Allergy and Critical Care Medicine, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Jason D Christie
- Division of Pulmonary, Allergy and Critical Care Medicine, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA.
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Kempińska-Podhorodecka A, Knap O, Drozd A, Kaczmarczyk M, Parafiniuk M, Parczewski M, Ciechanowicz A. Analysis for genotyping Duffy blood group in inhabitants of Sudan, the fourth cataract of the Nile. Malar J 2012; 11:115. [PMID: 22510366 PMCID: PMC3375187 DOI: 10.1186/1475-2875-11-115] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Accepted: 04/17/2012] [Indexed: 01/03/2023] Open
Abstract
Background Genetic polymophisms of the Duffy antigen receptor for the chemokines (DARC) gene successfully protected against blood stage infection by Plasmodium vivax infection. The Fy (a-, b-) phenotype is predominant among African populations, particularly those originating from West Africa, and it is rare among non-African populations. The aim of this study was to analyse the frequency of four Duffy blood groups based on SNPs (T-33C, G125A, G298A and C5411T) in two local tribes of Sudanese Arabs, the Shagia and Manasir, which are both from the region of the Fourth Nile cataract in Sudan. Methods An analysis of polymorphisms was performed on 217 individuals (126 representatives of the Shagia tribe and 91 of the Manasir). Real-time PCR and TaqMan Genotyping Assays were used to study the prevalence of alleles and genotypes. Results The analysis of allelic and genotype frequency in the T-33C polymorphisms demonstrated a significant dominance of the C allele and CC genotype (OR = 0.53 [0.32-0.88]; p = 0.02) in both tribes. The G125A polymorphism is associated with phenotype Fy(a-, b-) and was identified in 83% of Shagia and 77% of Manasir. With regard to G298A polymorphisms, the genotype frequencies were different between the tribes (p = 0,002) and no single AA homozygote was found. Based on four SNPs examined, 20 combinations of genotypes for the Shagia and Manasir tribes were determined. The genotype CC/AA/GG/CT occurred most often in Shagia tribe (45.9%) but was rare in the Manasir tribe (6.6%) (p < 0.001 Shagia versus Manasir). The FY*AES allele was identified in both analysed tribes. The presence of individuals with the FY*A/FY*A genotype was demonstrated only in the Shagia tribe. Conclusion This is probably the first report showing genotypically Duffy-negative people who carry both FY*BES and FY*AES. The identification of the FY*AES allele in both tribes may be due to admixture of the non-African genetic background. Taken as a whole, allele and genotype frequencies between the Shagia and the Manasir were statistically different. However, the presence of individuals with the FY*A/FY*A genotype was demonstrated only in the Shagia tribe.
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Granada M, Wilk JB, Tuzova M, Strachan DP, Weidinger S, Albrecht E, Gieger C, Heinrich J, Himes BE, Hunninghake GM, Celedón JC, Weiss ST, Cruikshank WW, Farrer LA, Center DM, O’Connor GT. A genome-wide association study of plasma total IgE concentrations in the Framingham Heart Study. J Allergy Clin Immunol 2012; 129:840-845.e21. [PMID: 22075330 PMCID: PMC3293994 DOI: 10.1016/j.jaci.2011.09.029] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Revised: 09/19/2011] [Accepted: 09/27/2011] [Indexed: 10/15/2022]
Abstract
BACKGROUND Atopy and plasma IgE concentration are genetically complex traits, and the specific genetic risk factors that lead to IgE dysregulation and clinical atopy are an area of active investigation. OBJECTIVE We sought to ascertain the genetic risk factors that lead to IgE dysregulation. METHODS A genome-wide association study (GWAS) was performed in 6819 participants from the Framingham Heart Study (FHS). Seventy of the top single nucleotide polymorphisms (SNPs) were selected based on P values and linkage disequilibrium among neighboring SNPs and evaluated in a meta-analysis with 5 independent populations from the Cooperative Health Research in the Region of Augsburg cohort, the British 1958 Birth Cohort, and the Childhood Asthma Management Program cohort. RESULTS Thirteen SNPs located in the region of 3 genes, FCER1A, signal transducer and activator of transcription 6 (STAT6), and IL13, were found to have genome-wide significance in the FHS cohort GWAS. The most significant SNPs from the 3 regions were rs2251746 (FCER1A, P = 2.11 × 10(-12)), rs1059513 (STAT6, P = 2.87 × 10(-8)), and rs1295686 (IL13, P = 3.55 × 10(-8)). Four additional gene regions, HLA-G, HLA-DQA2, HLA-A, and Duffy blood group, chemokine receptor (DARC), reached genome-wide statistical significance in a meta-analysis combining the FHS and replication cohorts, although the DARC association did not appear independent of SNPs in the nearby FCER1A gene. CONCLUSION This GWAS of the FHS cohort has identified genetic loci in HLA genes that might have a role in the pathogenesis of IgE dysregulation and atopy. It also confirmed the association of the known susceptibility loci FCER1A, STAT6, and IL13 for the dysregulation of total IgE.
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Affiliation(s)
- Mark Granada
- The Pulmonary Center, Boston University School of Medicine, Boston, MA
| | - Jemma B. Wilk
- The Pulmonary Center, Boston University School of Medicine, Boston, MA
- Department of Neurology, Boston University School of Medicine, Boston, MA
| | - Marina Tuzova
- The Pulmonary Center, Boston University School of Medicine, Boston, MA
| | - David P. Strachan
- Division of Community Health Science, St George’s, University of London, London SW17 ORE, UK
| | - Stephan Weidinger
- Dept. Of Dermatology and Allergy and ZAUM-Center for Allergy and Environment, Technische Universität München and Helmholtz Zentrum München, Munich, Germany; Dept. of Dermatology, University of Kiel, Kiel, Germany
| | - Eva Albrecht
- Institute of Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Christian Gieger
- Institute of Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Joachim Heinrich
- Institute of Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Blanca E. Himes
- Channing Laboratory, Department of Medicine, Brigham and Women’s Hospital, Department of Medicine, Harvard Medical School, Boston, Massachusetts
| | - Gary M. Hunninghake
- Channing Laboratory, Department of Medicine, Brigham and Women’s Hospital, Department of Medicine, Harvard Medical School, Boston, Massachusetts
| | - Juan C. Celedón
- Division of Pediatric Pulmonary Medicine, Allergy and Immunology; Children’s Hospital of Pittsburgh of UPMC; University of Pittsburgh School of Medicine
| | - Scott T. Weiss
- Channing Laboratory, Department of Medicine, Brigham and Women’s Hospital, Department of Medicine, Harvard Medical School, Boston, Massachusetts
| | | | - Lindsay A. Farrer
- Departments of Medicine, Neurology, Ophthalmology, and Genetics and Genomics, Boston University School of Medicine, Departments of Epidemiology and Biostatistics, Boston University School of Public Health, Boston, MA
| | - David M. Center
- The Pulmonary Center, Boston University School of Medicine, Boston, MA
| | - George T. O’Connor
- The Pulmonary Center, Boston University School of Medicine, Boston, MA
- The National Heart, Lung, and Blood Institute’s Framingham Heart Study
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Galzi JL, Haas M, Frossard N, Hibert M. Why and how to find neutraligands targeting chemokines? DRUG DISCOVERY TODAY. TECHNOLOGIES 2012; 9:e227-e314. [PMID: 24063739 DOI: 10.1016/j.ddtec.2012.03.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
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Kangelaris KN, Sapru A, Calfee CS, Liu KD, Pawlikowska L, Witte JS, Vittinghoff E, Zhuo H, Auerbach AD, Ziv E, Matthay MA. The association between a Darc gene polymorphism and clinical outcomes in African American patients with acute lung injury. Chest 2011; 141:1160-1169. [PMID: 22207676 DOI: 10.1378/chest.11-1766] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND Acute lung injury (ALI) mortality is increased among African Americans compared with Americans of European descent, and genetic factors may be involved. A functional T-46C polymorphism (rs2814778) in the promoter region of Duffy antigen/receptor for chemokines (Darc) gene, present almost exclusively in people of African descent, results in isolated erythrocyte DARC deficiency and has been implicated in ALI pathogenesis in preclinical and murine models, possibly because of an increase in circulating Duffy-binding, proinflammatory chemokines like IL-8. We sought to determine the effect of the functional rs2814778 polymorphism, C/C genotype (Duffy null state), on clinical outcomes in African Americans with acute lung injury. METHODS Clinical data and biologic specimens from African American patients with ALI who enrolled in three randomized controlled trials were analyzed. Multivariate analysis accounted for proportion of African ancestry, sex, cirrhosis, and severity of illness on presentation. RESULTS Among 132 subjects, 88 (67%) were Duffy null (C/C genotype). The Duffy null state was associated with a 17% absolute risk increase (95% CI, 1.4%-33%) in mortality at 60 days, a median of 8 fewer ventilator-free days (95% CI, 1-18.5), and 4.5 fewer organ failure-free days (95% CI, 0-18) compared with individuals with the C/T or T/T genotypes (all P values < .05). Estimates were similar on multivariate analysis. In African Americans without the null variant, clinical outcomes were similar to those in patients of European descent. A subgroup analysis suggested that plasma IL-8 levels are increased in Duffy null individuals. CONCLUSIONS Our results provide evidence that the functional rs2814778 polymorphism in the gene encoding DARC is associated with worse clinical outcomes among African Americans with ALI, possibly via an increase in circulating IL-8.
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Affiliation(s)
- Kirsten Neudoerffer Kangelaris
- Department of Medicine, Division of General Internal Medicine, University of California, San Francisco, San Francisco, CA; Division of Hospital Medicine, University of California, San Francisco, San Francisco, CA.
| | - Anil Sapru
- Department of Pediatrics, Division of Critical Care, University of California, San Francisco, San Francisco, CA
| | - Carolyn S Calfee
- Division of Pulmonary and Critical Care, University of California, San Francisco, San Francisco, CA; Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, CA
| | - Kathleen D Liu
- Division of Nephrology, University of California, San Francisco, San Francisco, CA; Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, CA
| | - Ludmila Pawlikowska
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, CA
| | - John S Witte
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA
| | - Eric Vittinghoff
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA
| | - Hanjing Zhuo
- Division of Pulmonary and Critical Care, University of California, San Francisco, San Francisco, CA
| | - Andrew D Auerbach
- Division of Hospital Medicine, University of California, San Francisco, San Francisco, CA
| | - Elad Ziv
- Department of Medicine, Division of General Internal Medicine, University of California, San Francisco, San Francisco, CA
| | - Michael A Matthay
- Division of Pulmonary and Critical Care, University of California, San Francisco, San Francisco, CA; Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, CA
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Kumar R, Tsai HJ, Hong X, Liu X, Wang G, Pearson C, Ortiz K, Fu M, Pongracic JA, Bauchner H, Wang X. Race, ancestry, and development of food-allergen sensitization in early childhood. Pediatrics 2011; 128:e821-9. [PMID: 21890831 PMCID: PMC3182844 DOI: 10.1542/peds.2011-0691] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVE We examined whether the risk of food-allergen sensitization varied according to self-identified race or genetic ancestry. METHODS We studied 1104 children (mean age: 2.7 years) from an urban multiethnic birth cohort. Food sensitization was defined as specific immunoglobulin E (sIgE) levels of ≥ 0.35 kilo-units of allergen (kUA)/L for any of 8 common food allergens. Multivariate logistic regression analyses were used to evaluate the associations of self-identified race and genetic ancestry with food sensitization. Analyses also examined associations with numbers of food sensitizations (0, 1 or 2, and ≥ 3 foods) and with logarithmically transformed allergen sIgE levels. RESULTS In this predominantly minority cohort (60.9% black and 22.5% Hispanic), 35.5% of subjects exhibited food sensitizations. In multivariate models, both self-reported black race (odds ratio [OR]: 2.34 [95% confidence interval [CI]: 1.24-4.44]) and African ancestry (in 10% increments; OR: 1.07 [95% CI: 1.02-1.14]) were associated with food sensitization. Self-reported black race (OR: 3.76 [95% CI: 1.09-12.97]) and African ancestry (OR: 1.19 [95% CI: 1.07-1.32]) were associated with a high number (≥ 3) of food sensitizations. African ancestry was associated with increased odds of peanut sIgE levels of ≥ 5 kUA/L (OR: 1.25 [95% CI: 1.01-1.52]). Similar ancestry associations were seen for egg sIgE levels of ≥ 2 kUA/L (OR: 1.13 [95% CI: 1.01-1.27]) and milk sIgE levels of ≥ 5 kUA/L (OR: 1.24 [95% CI: 0.94-1.63]), although findings were not significant for milk. CONCLUSIONS Black children were more likely to be sensitized to food allergens and were sensitized to more foods. African ancestry was associated with peanut sensitization.
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Affiliation(s)
- Rajesh Kumar
- aDivision of Allergy and Immunology, Children’s Memorial Hospital, Chicago, Illinois 60614, USA.
| | - Hui-Ju Tsai
- Mary Ann and J. Milburn Smith Child Health Research Program, Children's Memorial Hospital and Children's Memorial Research Center, Chicago, Illinois; ,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Evanston, Illinois; and
| | - Xiumei Hong
- Mary Ann and J. Milburn Smith Child Health Research Program, Children's Memorial Hospital and Children's Memorial Research Center, Chicago, Illinois
| | - Xin Liu
- Mary Ann and J. Milburn Smith Child Health Research Program, Children's Memorial Hospital and Children's Memorial Research Center, Chicago, Illinois
| | - Guoying Wang
- Mary Ann and J. Milburn Smith Child Health Research Program, Children's Memorial Hospital and Children's Memorial Research Center, Chicago, Illinois
| | - Colleen Pearson
- Department of Pediatrics, School of Medicine, Boston University, and Boston Medical Center, Boston, Massachusetts
| | - Katherin Ortiz
- Department of Pediatrics, School of Medicine, Boston University, and Boston Medical Center, Boston, Massachusetts
| | - Melanie Fu
- Mary Ann and J. Milburn Smith Child Health Research Program, Children's Memorial Hospital and Children's Memorial Research Center, Chicago, Illinois
| | - Jacqueline A. Pongracic
- Division of Allergy and Immunology, Children's Memorial Hospital, Chicago, Illinois; ,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Evanston, Illinois; and
| | - Howard Bauchner
- Department of Pediatrics, School of Medicine, Boston University, and Boston Medical Center, Boston, Massachusetts
| | - Xiaobin Wang
- Mary Ann and J. Milburn Smith Child Health Research Program, Children's Memorial Hospital and Children's Memorial Research Center, Chicago, Illinois
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O'Boyle G, Ali S, Kirby J. Chemokines in transplantation: what can atypical receptors teach us about anti-inflammatory therapy? Transplant Rev (Orlando) 2011; 25:136-44. [DOI: 10.1016/j.trre.2010.10.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2010] [Accepted: 10/07/2010] [Indexed: 01/08/2023]
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Pavenski K, Saidenberg E, Lavoie M, Tokessy M, Branch DR. Red blood cell storage lesions and related transfusion issues: a Canadian Blood Services research and development symposium. Transfus Med Rev 2011; 26:68-84. [PMID: 21871777 DOI: 10.1016/j.tmrv.2011.07.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
For centuries, man has been trying to figure out how to revive sick and traumatized individuals using fluids of various types, even from animals. In the 17th century, it was determined that blood was the best fluid to use and, in the early 1900s, after the discovery of the ABO blood groups, human blood was found to provide significant benefit for patients with shock and/or anemia. In the 1950s and 1960s, various ways to obtain, process, and store human blood were developed. It soon became apparent that storage of human blood for transfusion was problematic because red cells, as they aged in vitro, underwent a multitude of physicochemical changes that greatly affected their shelf life, the so-called storage lesion. More recently, the question has arisen as to the potential detrimental effects of the storage lesion and suggestions that older blood may induce increased morbidity and even mortality despite its acceptable in vivo survival. To address this issue of the efficacy and safety of transfusion of aged stored blood, a number of controlled clinical trials have been instituted to determine if older blood is significantly detrimental compared with fresher blood in transfusion recipients.
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Affiliation(s)
- Katerina Pavenski
- Department of Laboratory Medicine, St. Michael's Hospital, Toronto, ON, Canada
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Melén E, Kho AT, Sharma S, Gaedigk R, Leeder JS, Mariani TJ, Carey VJ, Weiss ST, Tantisira KG. Expression analysis of asthma candidate genes during human and murine lung development. Respir Res 2011; 12:86. [PMID: 21699702 PMCID: PMC3141421 DOI: 10.1186/1465-9921-12-86] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Accepted: 06/23/2011] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Little is known about the role of most asthma susceptibility genes during human lung development. Genetic determinants for normal lung development are not only important early in life, but also for later lung function. OBJECTIVE To investigate the role of expression patterns of well-defined asthma susceptibility genes during human and murine lung development. We hypothesized that genes influencing normal airways development would be over-represented by genes associated with asthma. METHODS Asthma genes were first identified via comprehensive search of the current literature. Next, we analyzed their expression patterns in the developing human lung during the pseudoglandular (gestational age, 7-16 weeks) and canalicular (17-26 weeks) stages of development, and in the complete developing lung time series of 3 mouse strains: A/J, SW, C57BL6. RESULTS In total, 96 genes with association to asthma in at least two human populations were identified in the literature. Overall, there was no significant over-representation of the asthma genes among genes differentially expressed during lung development, although trends were seen in the human (Odds ratio, OR 1.22, confidence interval, CI 0.90-1.62) and C57BL6 mouse (OR 1.41, CI 0.92-2.11) data. However, differential expression of some asthma genes was consistent in both developing human and murine lung, e.g. NOD1, EDN1, CCL5, RORA and HLA-G. Among the asthma genes identified in genome wide association studies, ROBO1, RORA, HLA-DQB1, IL2RB and PDE10A were differentially expressed during human lung development. CONCLUSIONS Our data provide insight about the role of asthma susceptibility genes during lung development and suggest common mechanisms underlying lung morphogenesis and pathogenesis of respiratory diseases.
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Affiliation(s)
- Erik Melén
- Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
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Barnes KC. Genetic studies of the etiology of asthma. PROCEEDINGS OF THE AMERICAN THORACIC SOCIETY 2011; 8:143-8. [PMID: 21543791 PMCID: PMC3131830 DOI: 10.1513/pats.201103-030ms] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Accepted: 03/25/2011] [Indexed: 12/22/2022]
Abstract
Asthma is a heterogeneous disease for which a strong genetic basis is firmly established. Although the generally accepted definition includes three domains of symptoms (variable airway obstruction, airway hyper-responsiveness, and airway inflammation), there is general agreement that, rather than being a single disease entity, asthma consists of related, overlapping syndromes. A considerable proportion of asthma is IgE-mediated, but the observation that not all individuals with asthma are atopic adds to the heterogeneity. Although a genetic basis for asthma is undeniable, elucidation of polymorphisms that are "causal" is greatly hampered by variability in the clinical phenotype, which is likely due to the multiple molecular mechanisms underlying the complex pathological processes involved in disease development and progression. One objective of this review is to consider progress that has been made to date in gene discovery in the field of asthma, with a focus on the evolution of molecular genetic methods that have led to the discoveries thus far, and with a particular focus on the major advances owed to the published genome-wide association studies (GWAS) on asthma to date. A second objective is to consider a Darwinian approach toward understanding the genetic underpinnings of asthma, including evidence supporting a modified Hygiene Hypothesis, which suggests that there are co-associations between asthma risk polymorphisms and polymorphisms associated with another IgE-mediated disease, schistosomiasis. The overall conclusion is that the huge research efforts and expense committed to asthma genetics have changed the perception about disease etiology in general and the functional relevance of the asthma genes identified thus far in particular.
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Affiliation(s)
- Kathleen C Barnes
- The Johns Hopkins Asthma & Allergy Center, Baltimore, MD 21224, USA.
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Abstract
Atypical chemokine receptors (ACRs) are cell surface receptors with seven transmembrane domains structurally homologous to chemokine G-protein coupled receptors (GPCRs). However, upon ligation by cognate chemokines, ACRs fail to induce classical signaling and downstream cellular responses characteristic for GPCRs. Despite this, by affecting chemokine availability and function, ACRs impact on a multitude of pathophysiological events and have emerged as important molecular players in health and disease. This review discusses individual characteristics of the currently known ACRs, highlights their similarities and differences and attempts to establish their group identity. It summarizes the progress made in mapping ACR expression, understanding their diverse in vitro and in vivo functions of ACRs and uncovering their contributions to disease pathogeneses.
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Affiliation(s)
| | | | - Antal Rot
- MRC Centre for Immune Regulation, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
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Lettow I, Berres ML, Schmitz P, Müller T, Berg T, Neumann UP, Trautwein C, Wasmuth HE. A Duffy antigen receptor for chemokines (DARC) polymorphism that determines pro-fibrotic chemokine serum concentrations is not directly associated with severity of hepatitis C infection. Hum Immunol 2011; 72:273-7. [DOI: 10.1016/j.humimm.2010.12.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Revised: 11/25/2010] [Accepted: 12/06/2010] [Indexed: 01/29/2023]
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Abstract
Chemokine receptors adorn the surface of leukocytes and other cell types ready to translate the extracellular chemokine environment into functional cellular outcomes. However, there are several molecules that, in many respects, look like chemokine receptors, but which do not have the ability to confer chemotactic potential to cell lines. This apparent silence spurred the search for signalling-independent functions and led to the development of new paradigms of chemokine regulation. In this review, we summarise the experimental basis for these ideas focussing on DARC and D6, the most studied members of this group of molecules. We discuss data generated using in vitro systems and genetically deficient mice, include results from observational human studies, and summarise the key findings of recent research. We take a critical look at current models of in vivo function highlighting important gaps in our knowledge and demonstrating that there is still much to find out about these enigmatic molecules.
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Affiliation(s)
- Chris A H Hansell
- Institute for Infection, Immunity & Inflammation, College of Medical, Veterinary & Life Sciences, Sir Graeme Davis Building, 120 University Place, Glasgow G12 8TA
| | - Catherine E Hurson
- Institute for Infection, Immunity & Inflammation, College of Medical, Veterinary & Life Sciences, Sir Graeme Davis Building, 120 University Place, Glasgow G12 8TA
| | - Robert J B Nibbs
- Institute for Infection, Immunity & Inflammation, College of Medical, Veterinary & Life Sciences, Sir Graeme Davis Building, 120 University Place, Glasgow G12 8TA
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Maestre A, Muskus C, Duque V, Agudelo O, Liu P, Takagi A, Ntumngia FB, Adams JH, Sim KL, Hoffman SL, Corradin G, Velez ID, Wang R. Acquired antibody responses against Plasmodium vivax infection vary with host genotype for duffy antigen receptor for chemokines (DARC). PLoS One 2010; 5:e11437. [PMID: 20664684 PMCID: PMC2896388 DOI: 10.1371/journal.pone.0011437] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2009] [Accepted: 04/04/2010] [Indexed: 01/28/2023] Open
Abstract
Background Polymorphism of the Duffy Antigen Receptor for Chemokines (DARC) is associated with susceptibility to and the severity of Plasmodium vivax malaria in humans. P. vivax uses DARC to invade erythrocytes. Individuals lacking DARC are ‘resistant’ to P. vivax erythrocytic infection. However, susceptibility to P. vivax in DARC+ individuals is reported to vary between specific DARC genotypes. We hypothesized that the natural acquisition of antibodies to P. vivax blood stages may vary with the host genotype and the level of DARC expression. Furthermore, high parasitemia has been reported to effect the acquisition of immunity against pre-erythrocytic parasites. We investigated the correlation between host DARC genotypes and the frequency and magnitude of antibodies against P. vivax erythrocytic stage antigens. Methodology/Findings We assessed the frequencies and magnitudes of antibody responses against P. vivax and P. falciparum sporozoite and erythrocytic antigens in Colombian donors from malaria-endemic regions. The frequency and level of naturally-acquired antibodies against the P. vivax erythrocytic antigens merozoite surface protein 1 (PvMSP1) and Duffy binding protein (PvDBP) varied with the host DARC genotypes. Donors with one negative allele (FY*B/FY*Bnull and FY*A/FY*Bnull) were more likely to have anti-PvMSP1 and anti-PvDBP antibodies than those with two positive alleles (FY*B/FY*B and FY*A/FY*B). The lower IgG3 and IgG1 components of the total IgG response may account for the decreased responses to P. vivax erythrocytic antigens with FY*A/FY*B and FY*B/FY*B genotypes. No such association was detected with P. falciparum erythrocytic antigens, which does not use DARC for erythrocyte invasion. Conclusion/Significance Individuals with higher DARC expression, which is associated with higher susceptibility to P. vivax infection, exhibited low frequencies and magnitudes of P. vivax blood-stage specific antibody responses. This may indicate that one of the primary mechanisms by which P. vivax evades host immunity is through DARC indirectly down-regulating humoral responses against erythrocytic invasion and development.
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Affiliation(s)
- Amanda Maestre
- Grupo Salud y Comunidad, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - Carlos Muskus
- Programa de Estudio y Control de Enfermedades Tropicales (PECET), Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - Victoria Duque
- Programa de Estudio y Control de Enfermedades Tropicales (PECET), Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - Olga Agudelo
- Programa de Estudio y Control de Enfermedades Tropicales (PECET), Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - Pu Liu
- Seattle Biomedical Research Institute (SBRI), Seattle, Washington, United States of America
| | - Akihide Takagi
- Seattle Biomedical Research Institute (SBRI), Seattle, Washington, United States of America
| | | | - John H. Adams
- University of South Florida, Tampa, Florida, United States of America
| | - Kim Lee Sim
- Protein Potential LLC., Rockville, Maryland, United States of America
| | | | | | - Ivan D. Velez
- Programa de Estudio y Control de Enfermedades Tropicales (PECET), Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - Ruobing Wang
- Seattle Biomedical Research Institute (SBRI), Seattle, Washington, United States of America
- * E-mail:
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Halapi E, Bjornsdottir US. Overview on the current status of asthma genetics. CLINICAL RESPIRATORY JOURNAL 2010; 3:2-7. [PMID: 20298365 DOI: 10.1111/j.1752-699x.2008.00119.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Asthma is a complex heterogeneous and mutifactorial disease occurring at the interface of multiple genes that interact with various environmental stimuli insulting the immune system at different levels and different times of disease susceptibility. OBJECTIVE The present paper is a review of the current status of the genetics of asthma. RESULTS Sequence variants in hundreds of genes have been associated with asthma using both family-based and case control screening methods. CONCLUSION As the number of genes known to be associated with asthma risk is rapidly growing, it is essential to begin integrating epidemiologic, genetic and genomic strategies to unravel the relationships between genotype and phenotype, and elucidate the pathogenesis of asthma with the goal to make clinical use of these discoveries.
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Affiliation(s)
- Eva Halapi
- deCODE Genetics Inc., Sturlugata, Reykjavik, Iceland.
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Abstract
In Africa, the burden of some diseases has been a problem for centuries. The spectrum of African diseases includes allergies, infections, nutritional deficiencies, and natural disasters. Efforts made by scientists to search for possible means of disease control have been outstanding; however, in some infections, solutions are still out of reach. In disease control programs, it might be worthwhile to pay attention to the most striking diseases than merely follow a holistic approach. This short review tackles the problems of allergy and allergens in Africa as compared with other disease burdens that may suggest the need for a more balanced approach based on priority.
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Affiliation(s)
- Erasto Vitus Mbugi
- Muhimbili University of Health and Allied Sciences, Biochemistry Department, School of Medicine, Dar es Salaam, Tanzania
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Blood groups and malaria: fresh insights into pathogenesis and identification of targets for intervention. Curr Opin Hematol 2010; 16:480-7. [PMID: 19812491 DOI: 10.1097/moh.0b013e3283313de0] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW This review summarizes recent advances in our understanding of the interaction between malaria parasites and blood group antigens and discusses how the knowledge gleaned can be used to target the development of new antimalarial treatments and vaccines. RECENT FINDINGS Studies of the interaction between Plasmodium vivax and the Duffy antigen provide the clearest example of the potential for basic research on blood groups and malaria to be translated into a vaccine that could have a major impact on global health. Progress is also being made in understanding the effects of other blood group antigens on malaria. After years of controversy, the effect of ABO blood groups on falciparum malaria has been clarified, with the non-O blood groups emerging as significant risk factors for life-threatening malaria, through the mechanism of enhanced rosette formation. The Knops blood group system may also influence malaria susceptibility, although conflicting results from different countries mean that further research is required. Unanswered questions remain about the interactions between malaria parasites and other blood group antigens, including the Gerbich, MNS and Rhesus systems. SUMMARY The interplay between malaria parasites and blood group antigens remains a fascinating subject with potential to contribute to the development of new interventions to reduce the global burden of malaria.
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Vergara CI, Acevedo N, Jiménez S, Martínez B, Mercado D, Gusmão L, Barnes KC, Caraballo L. A Six-SNP haplotype of ADAM33 is associated with asthma in a population of Cartagena, Colombia. Int Arch Allergy Immunol 2009; 152:32-40. [PMID: 19940503 DOI: 10.1159/000260081] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2009] [Accepted: 07/17/2009] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND A disintegrin and metalloprotein-33 (ADAM33) participates in the bronchial remodeling process in asthma, and genetic analyses pointed it out as a candidate gene in asthma. METHODS To analyze the association between ADAM33 and asthma and total and mite-specific IgE levels in a population of the Caribbean Coast of Colombia, we genotyped 6 single-nucleotide polymorphisms of ADAM33 in 429 asthmatics, 401 controls and 116 family trios using fluorogenic probes. Total and specific IgE against Blomia tropicalis and Dermatophagoides pteronyssinus were determined by ELISA. Case-control and family-based analyses were performed. Case-control association analyses were corrected by population stratification using a set of 52 ancestry-informative markers. RESULTS Eight common haplotypes were identified; among them, H4 (GCAGGG) was associated with asthma in the family group (Z score: -2.049, p = 0.04). We also found an association between the TT genotype of ST+7 and asthma in the case-control study (p = 0.05) that disappeared after correcting for multiple testing. In the family-based analysis, this genotype was a risk factor for asthma (p = 0.01), high total IgE (Z score: 2.546, p = 0.01) and high specific IgE against B. tropicalis (p = 0.02) and D. pteronyssinus (Z score: 2.414, p = 0.01). V4 was associated with specific IgE against B. tropicalis (p = 0.03); T2 with asthma (p = 0.03), high total IgE (p = 0.02) and IgE against D. pteronyssinus (p = 0.03) and T1 with high total IgE (p = 0.04). None of these associations was maintained after correction for multiple testing. CONCLUSIONS Our findings suggest a relevant role of ADAM33 in thepathogenesis of asthma in this population.
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Affiliation(s)
- Candelaria I Vergara
- Institute for Immunological Research, University of Cartagena, Cartagena, Colombia
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Vergara C, Jiménez S, Acevedo N, Martínez B, Mercado D, Gusmão L, Rafaels N, Hand T, Barnes KC, Caraballo L. Association of G-protein-coupled receptor 154 with asthma and total IgE in a population of the Caribbean coast of Colombia. Clin Exp Allergy 2009; 39:1558-68. [PMID: 19624525 DOI: 10.1111/j.1365-2222.2009.03311.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND G protein-coupled receptor 154 was described as an asthma susceptibility gene by positional cloning. It has been subsequently associated with asthma and other inflammatory diseases in several populations with different ethnic origin. Replication of associations adds reliability to these findings. OBJECTIVE To analyze the association of G protein-coupled receptor 154 with asthma and total and mite-specific IgE levels in a population of the Caribbean Coast of Colombia. METHODS We genotyped seven single nucleotide proteins (SNPs) in GPR154 in 475 asthmatics, 394 controls and 116 families from Cartagena, Colombia using either SnaPshot or TaqMan. Total and specific IgE against Blomia tropicalis and Dermatophagoides pteronyssinus were determined by ELISA. Hardy-Weinberg equilibrium was assessed and case-control and family-based analyses were performed to evaluate the association between the SNPs and their haplotypes and asthma and IgE. Association analyses in the case-control dataset were corrected by population stratification using 52 ancestry informative markers. RESULTS Allelic distribution was similar to that described in other populations. Two SNPs were associated with the same direction of the effect in both datasets. Allele A of Hopo546333 was protective for asthma (case-control OR: 0.42; 95% CI: 0.17-0.99, P=0.042; P=0.043; families Z score=-2,236; P=0.025). Similarly, allele C of rs740347 conferred low risk for asthma (OR: 0.44; 95% CI: 0.28-0.70, P=0.00017; Pc=0.00037) and total IgE (OR: 0.29; 95% CI: 0.09-0.88, P=0.015; Pc=0.030) in the case-control study and families (Z score=-3.207, P=0.0013; Z score=-3.182, P=0.0014, respectively). Haplotype CCAGGT was associated with total IgE (OR: 1.76; 95% CI: 1.14-2.71, P=0.006, Pc=0.007) in the case-controls group and CGCGGT with both phenotypes (P=0.044 and P=0.032, respectively) in families. Neither SNPs nor haplotypes were associated with levels of mite-specific IgE. CONCLUSIONS Our findings in a sample of asthmatics from Colombia suggest a relevant role of G protein-coupled receptor 154 in the pathogenesis of asthma and allergy.
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Affiliation(s)
- C Vergara
- Institute for Immunological Research, University of Cartagena, Cartagena, Colombia
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Affiliation(s)
- Wendy C Moore
- Section on Pulmonary, Critical Care, Allergy and Immunologic Diseases and the Center for Human Genomics, Wake Forest University, Winston-Salem, NC 27106, USA.
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Abstract
The Duffy Antigen/Receptor for Chemokine (DARC) is a seven segment transmembrane protein. It was firstly discovered as a blood group antigen and was the first specific gene locus assigned to a specific autosome in man. It became more famous as an erythrocyte receptor for malaria parasites (Plasmodium vivax and Plasmodium knowlesi), and finally for chemokines. DARC is an unorthodox chemokine receptor as (i) it binds chemokines of both CC and CXC classes and (ii) it lacks the Asp-Arg-Tyr consensus motif in its second cytoplasmic loop hence cannot couple to G proteins and activate their signaling pathways. DARC had also been associated to cancer progression, numerous inflammatory diseases, and possibly to AIDS. In this review, we will summarize important biological data on DARC. Then we shall focus on recent development of the elaboration and analyzes of structural models of DARC. We underline the difficulty to propose pertinent structural models of transmembrane protein using comparative modeling process, and other dedicated approaches as the Protein Blocks. The chosen structural models encompass most of the biochemical data known to date. Finally, we present recent development of protein-protein docking between DARC structural models and CXCL-8 structures. We propose a hierarchical search based on separated rigid and flexible docking.
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Affiliation(s)
- Alexandre G de Brevern
- INSERM UMR-S 665, Université Paris Diderot-Paris 7, Institut National de la Transfusion Sanguine, 6, rue Alexandre Cabanel, 75739 Paris 15, France.
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