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Yeyeodu S, Hanafi D, Webb K, Laurie NA, Kimbro KS. Population-enriched innate immune variants may identify candidate gene targets at the intersection of cancer and cardio-metabolic disease. Front Endocrinol (Lausanne) 2024; 14:1286979. [PMID: 38577257 PMCID: PMC10991756 DOI: 10.3389/fendo.2023.1286979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 12/07/2023] [Indexed: 04/06/2024] Open
Abstract
Both cancer and cardio-metabolic disease disparities exist among specific populations in the US. For example, African Americans experience the highest rates of breast and prostate cancer mortality and the highest incidence of obesity. Native and Hispanic Americans experience the highest rates of liver cancer mortality. At the same time, Pacific Islanders have the highest death rate attributed to type 2 diabetes (T2D), and Asian Americans experience the highest incidence of non-alcoholic fatty liver disease (NAFLD) and cancers induced by infectious agents. Notably, the pathologic progression of both cancer and cardio-metabolic diseases involves innate immunity and mechanisms of inflammation. Innate immunity in individuals is established through genetic inheritance and external stimuli to respond to environmental threats and stresses such as pathogen exposure. Further, individual genomes contain characteristic genetic markers associated with one or more geographic ancestries (ethnic groups), including protective innate immune genetic programming optimized for survival in their corresponding ancestral environment(s). This perspective explores evidence related to our working hypothesis that genetic variations in innate immune genes, particularly those that are commonly found but unevenly distributed between populations, are associated with disparities between populations in both cancer and cardio-metabolic diseases. Identifying conventional and unconventional innate immune genes that fit this profile may provide critical insights into the underlying mechanisms that connect these two families of complex diseases and offer novel targets for precision-based treatment of cancer and/or cardio-metabolic disease.
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Affiliation(s)
- Susan Yeyeodu
- Julius L Chambers Biomedical/Biotechnology Institute (JLC-BBRI), North Carolina Central University, Durham, NC, United States
- Charles River Discovery Services, Morrisville, NC, United States
| | - Donia Hanafi
- Julius L Chambers Biomedical/Biotechnology Institute (JLC-BBRI), North Carolina Central University, Durham, NC, United States
| | - Kenisha Webb
- Department of Microbiology, Biochemistry, and Immunology, Morehouse School of Medicine, Atlanta, GA, United States
| | - Nikia A. Laurie
- Julius L Chambers Biomedical/Biotechnology Institute (JLC-BBRI), North Carolina Central University, Durham, NC, United States
| | - K. Sean Kimbro
- Department of Microbiology, Biochemistry, and Immunology, Morehouse School of Medicine, Atlanta, GA, United States
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2
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Li L, Wei B, Jia J, Li M, Ren M, Zhang S. P2X3- P2X7 SNPs and gene-gene and gene-environment interactions on pediatric asthma. J Asthma 2023; 60:1438-1445. [PMID: 36469748 DOI: 10.1080/02770903.2022.2155184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND To investigate the relationship between polymorphisms of P2X3, P2X7 genes and environment interaction with susceptibility of childhood asthma. METHODS We conducted a matched case-control study with 170 cases and 175 healthy controls. The rs10896611, rs2276038, rs3781899 in P2X3 and rs1718119, rs3751143 in P2X7 polymorphisms were genotyped using the technique of an improved multiplex ligation detection reaction. Gene-gene, gene-environment and haplotype-environment interactions were tested using the generalized multi-factor dimensionality reduction method. RESULTS There were no differences between cases and controls in allele or genotype frequencies of P2X3 and P2X7. The C/C, G/C genotypes of rs10896611, and C/C, C/T genotypes of rs2276038 and G/G, G/A genotypes of rs3781899 were associated with asthmatic cough (p > 0.05). The haplotype GCT of P2X3 reduced the risk of asthma (OR = 0.48, p = 0.048), and the haplotypes AGT (OR = 0.45, p = 0.001) and GCC (OR = 2.16, p = 0.002) were associated with asthmatic cough. The haplotype AA of P2X7 increased risk of asthma severity (p < 0.05). The three-locus model indicated a potential haplotype-environment interaction in GCT, ETS, and pet (p = 0.001). CONCLUSIONS The rs10896611, rs2276038 and rs3781899 of P2X3 minor alleles increased the risk of asthmatic cough. Haplotype GCT of P2X3 was a protective factor for asthma, the haplotype AGT was a protective factor and GCC was a risk factor for asthma with cough. In addition, the interactions of haplotype GCT of P2X3, ETS and pet may increase an individual's susceptibility to asthma.
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Affiliation(s)
- Lingxue Li
- Department of Neonatology, Northern Theater Command General Hospital (formerly General Hospital of Shenyang Military Command), Shenyang, P.R. China
| | - Bing Wei
- Department of Neonatology, Northern Theater Command General Hospital (formerly General Hospital of Shenyang Military Command), Shenyang, P.R. China
| | - Jingjing Jia
- Department of Neonatology, Northern Theater Command General Hospital (formerly General Hospital of Shenyang Military Command), Shenyang, P.R. China.,Post-graduate College, Jinzhou Medical University, Jinzhou, P.R. China
| | - Mo Li
- Department of Neonatology, Northern Theater Command General Hospital (formerly General Hospital of Shenyang Military Command), Shenyang, P.R. China
| | - Mengyang Ren
- Department of Neonatology, Northern Theater Command General Hospital (formerly General Hospital of Shenyang Military Command), Shenyang, P.R. China.,Post-graduate College, Jinzhou Medical University, Jinzhou, P.R. China
| | - Shinan Zhang
- Department of Neonatology, Northern Theater Command General Hospital (formerly General Hospital of Shenyang Military Command), Shenyang, P.R. China
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Tsuo K, Zhou W, Wang Y, Kanai M, Namba S, Gupta R, Majara L, Nkambule LL, Morisaki T, Okada Y, Neale BM, Daly MJ, Martin AR. Multi-ancestry meta-analysis of asthma identifies novel associations and highlights the value of increased power and diversity. CELL GENOMICS 2022; 2:100212. [PMID: 36778051 PMCID: PMC9903683 DOI: 10.1016/j.xgen.2022.100212] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 09/01/2022] [Accepted: 10/12/2022] [Indexed: 11/09/2022]
Abstract
Asthma is a complex disease that varies widely in prevalence across populations. The extent to which genetic variation contributes to these disparities is unclear, as the genetics underlying asthma have been investigated primarily in populations of European descent. As part of the Global Biobank Meta-analysis Initiative, we conducted a large-scale genome-wide association study of asthma (153,763 cases and 1,647,022 controls) via meta-analysis across 22 biobanks spanning multiple ancestries. We discovered 179 asthma-associated loci, 49 of which were not previously reported. Despite the wide range in asthma prevalence among biobanks, we found largely consistent genetic effects across biobanks and ancestries. The meta-analysis also improved polygenic risk prediction in non-European populations compared with previous studies. Additionally, we found considerable genetic overlap between age-of-onset subtypes and between asthma and comorbid diseases. Our work underscores the multi-factorial nature of asthma development and offers insight into its shared genetic architecture.
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Affiliation(s)
- Kristin Tsuo
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Wei Zhou
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Ying Wang
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Masahiro Kanai
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA, USA
- Department of Statistical Genetics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Shinichi Namba
- Department of Statistical Genetics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Rahul Gupta
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Howard Hughes Medical Institute and Department of Molecular Biology, Massachusetts General Hospital, Boston, MA, USA
| | - Lerato Majara
- Department of Psychiatry and Mental Health, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Lethukuthula L. Nkambule
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Takayuki Morisaki
- Division of Molecular Pathology, The Institute of Medical Science, The University of Tokyo, Minatu-ku, Tokyo, Japan
| | - Yukinori Okada
- Department of Statistical Genetics, Osaka University Graduate School of Medicine, Suita, Japan
- Laboratory for Systems Genetics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
- Laboratory of Statistical Immunology, Immunology Frontier Research Center (WPI-IFReC), Osaka University, Suita 565-0871, Japan
- Department of Genome Informatics, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
- Center for Infectious Disease Education and Research (CiDER), Osaka University, Suita 565-0871, Japan
| | - Benjamin M. Neale
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Global Biobank Meta-analysis Initiative
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA, USA
- Department of Statistical Genetics, Osaka University Graduate School of Medicine, Suita, Japan
- Howard Hughes Medical Institute and Department of Molecular Biology, Massachusetts General Hospital, Boston, MA, USA
- Department of Psychiatry and Mental Health, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
- Division of Molecular Pathology, The Institute of Medical Science, The University of Tokyo, Minatu-ku, Tokyo, Japan
- Laboratory for Systems Genetics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
- Laboratory of Statistical Immunology, Immunology Frontier Research Center (WPI-IFReC), Osaka University, Suita 565-0871, Japan
- Department of Genome Informatics, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
- Center for Infectious Disease Education and Research (CiDER), Osaka University, Suita 565-0871, Japan
- Institute for Molecular Medicine Finland, University of Helsinki, Helsinki, Finland
| | - Mark J. Daly
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Institute for Molecular Medicine Finland, University of Helsinki, Helsinki, Finland
| | - Alicia R. Martin
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
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Adejare AA, Gautam Y, Madzia J, Mersha T. Unraveling racial disparities in asthma emergency department visits using electronic healthcare records and machine learning. J Asthma 2022; 59:79-93. [PMID: 33112174 PMCID: PMC8221365 DOI: 10.1080/02770903.2020.1838539] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVE Hospital emergency department (ED) visits by asthmatics differ based on race and season. The objectives of this study were to investigate season- and race-specific disparities for asthma risk, and to identify environmental exposure variables associated with ED visits among more than 42,000 individuals of African American (AA) and European American (EA) descent identified through electronic health records (EHRs). METHODS We examined data from 42,375 individuals (AAs = 14,491, EAs = 27,884) identified in EHRs. We considered associated demographic (race, age, gender, insurance), clinical (smoking status, ED visits, FEV1%), and environmental exposures data (mold, pollen, and pollutants). Machine learning techniques, including random forest (RF), extreme gradient boosting (XGB), and decision tree (DT) were used to build and identify race- and -season-specific predictive models for asthma ED visits. RESULTS Significant differences in ED visits and FEV1% among AAs and EAs were identified. ED visits by AAs was 32.0% higher than EAs and AAs had 6.4% lower FEV1% value than EAs. XGB model was used to accurately classify asthma patients visiting ED into AAs and EAs. Pollen factor and pollution (PM2.5, PM10) were the key variables for asthma in AAs and EAs, respectively. Age and cigarette smoking increase asthma risk independent of seasons. CONCLUSIONS In this study, we observed racial and season-specific disparities between AAs and EAs asthmatics for ED visit and FEV1% severity, suggesting the need to address asthma disparities through key predictors including socio-economic status, particulate matter, and mold.
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Affiliation(s)
- Adeboye A. Adejare
- Department of Biomedical Informatics, University of Cincinnati; Cincinnati, OH, USA
| | - Yadu Gautam
- Division of Asthma Research, Department of Pediatrics, Cincinnati Children’s Hospital Medical Center, University of Cincinnati, Cincinnati, OH, USA
| | - Juliana Madzia
- Division of Asthma Research, Department of Pediatrics, Cincinnati Children’s Hospital Medical Center, University of Cincinnati, Cincinnati, OH, USA
| | - Tesfaye Mersha
- Division of Asthma Research, Department of Pediatrics, Cincinnati Children’s Hospital Medical Center, University of Cincinnati, Cincinnati, OH, USA,Corresponding author: Tesfaye B. Mersha, Ph.D. Associate Professor Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati, 3333 Burnet Avenue, MLC 7037, Cincinnati, OH 45229-3026. Phone: (513) 803-2766 Fax: (513) 636-1657.
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5
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Meteoukki W, Fodil M, Negaz NA, Rahmoun N, Hetraf SL, Djellouli HO, Messal AD, Abdi M, Aberkane MS, Chiali A, Derdour A, Idder A, -Fodil FZ. Association of IL4 rs2070874, FoxP3 rs3761548 Polymorphisms with Keratoconus in Algeria. J Ophthalmic Vis Res 2021; 16:558-565. [PMID: 34840678 PMCID: PMC8593538 DOI: 10.18502/jovr.v16i4.9745] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 04/15/2021] [Indexed: 01/10/2023] Open
Abstract
Purpose The aim of this case–control study was to determine the impact of environmental factors on the predisposition to develop keratoconus in a sample of Western Algerian population. Subsequently, we were interested in the implication of two single nucleotide polymorphisms (SNPs) IL4 rs2070874 and FOXP3 rs3761548, previously described as contributing to the occurrence of allergy, in the development of keratoconus. Methods The study included 70 unrelated KC cases and 70 controls originating from Western Algeria. DNA genotyping was done using predesigned probe-based allelic discrimination TaqManⓇ assays. Allele and genotype frequencies were compared between the cases and controls by Chi-square test and odds ratios with 95% confidence intervals. Results A significant association between risk factors such as family history, atopy, eye rubbing, and the development of keratoconus was found in our sample. Smoking would provide a protective effect against the pathology. No statistically significant differences were found in the allele and genotype frequencies between cases and controls neither for IL4 rs2070874 nor for FOXP3 rs3761548. Conclusion Our study provides, for the first time, a clear demonstration of the absence of association of the allergy-associated IL4 and FOXP3 polymorphisms with KC in a sample from Western Algerian population.
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Affiliation(s)
- Wafaa Meteoukki
- Laboratoire de Génétique Moléculaire et Cellulaire (LGMC), Université des Sciences et de la Technologie d'Oran Mohamed BOUDIAF- USTO-MB, BP 1505, El M'naouer, 31000 Oran, Algérie.,Agence Thématique de Recherche en Sciences de la Santé (ATRSS)- Oran, Algérie
| | - Mostefa Fodil
- Agence Thématique de Recherche en Sciences de la Santé (ATRSS)- Oran, Algérie.,Ecole Supérieure des Sciences Biologiques d'Oran (ESSBO)
| | - Nawel Adda Negaz
- Agence Thématique de Recherche en Sciences de la Santé (ATRSS)- Oran, Algérie.,Clinique Chiali, Oran, Algérie
| | - Nesrine Rahmoun
- Laboratoire de Génétique Moléculaire et Cellulaire (LGMC), Université des Sciences et de la Technologie d'Oran Mohamed BOUDIAF- USTO-MB, BP 1505, El M'naouer, 31000 Oran, Algérie
| | - Sarah Lardjam Hetraf
- Laboratoire de Génétique Moléculaire et Cellulaire (LGMC), Université des Sciences et de la Technologie d'Oran Mohamed BOUDIAF- USTO-MB, BP 1505, El M'naouer, 31000 Oran, Algérie
| | - Hadjira Ouhaibi Djellouli
- Laboratoire de Génétique Moléculaire et Cellulaire (LGMC), Université des Sciences et de la Technologie d'Oran Mohamed BOUDIAF- USTO-MB, BP 1505, El M'naouer, 31000 Oran, Algérie
| | - Ahlem Djelti Messal
- Laboratoire de Génétique Moléculaire et Cellulaire (LGMC), Université des Sciences et de la Technologie d'Oran Mohamed BOUDIAF- USTO-MB, BP 1505, El M'naouer, 31000 Oran, Algérie
| | - Meriem Abdi
- Laboratoire de Génétique Moléculaire et Cellulaire (LGMC), Université des Sciences et de la Technologie d'Oran Mohamed BOUDIAF- USTO-MB, BP 1505, El M'naouer, 31000 Oran, Algérie
| | - Meriem Samia Aberkane
- Laboratoire de Génétique Moléculaire et Cellulaire (LGMC), Université des Sciences et de la Technologie d'Oran Mohamed BOUDIAF- USTO-MB, BP 1505, El M'naouer, 31000 Oran, Algérie
| | | | - Amine Derdour
- Laboratoire de Génétique Médicale Appliquée à l'Ophtalmologie, Clinique Hammou Boutlélis Oran, Algérie
| | - Aicha Idder
- Agence Thématique de Recherche en Sciences de la Santé (ATRSS)- Oran, Algérie.,Laboratoire de Génétique Médicale Appliquée à l'Ophtalmologie, Clinique Hammou Boutlélis Oran, Algérie
| | - Faouzia Zemani -Fodil
- Laboratoire de Génétique Moléculaire et Cellulaire (LGMC), Université des Sciences et de la Technologie d'Oran Mohamed BOUDIAF- USTO-MB, BP 1505, El M'naouer, 31000 Oran, Algérie.,Agence Thématique de Recherche en Sciences de la Santé (ATRSS)- Oran, Algérie
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6
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Chronic itch in African Americans: an unmet need. Arch Dermatol Res 2021; 314:405-415. [PMID: 34129098 DOI: 10.1007/s00403-021-02255-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 06/05/2021] [Indexed: 10/21/2022]
Abstract
Chronic pruritus carries a significant burden of disease and is associated with a negative impact on quality of life. African Americans are disproportionately burdened by chronic pruritic disorders, including but not limited to atopic dermatitis, prurigo nodularis, inflammatory scalp dermatoses, pathologic scarring, and HIV-related dermatoses. Racial differences in skin structure and function may contribute to the pathogenesis of itch in African Americans. Itch perception and response to treatment in African Americans remain understudied and not well understood. As such, there is a large unmet need with regard to the knowledge and management of pruritus in African Americans. This review highlights notable differences in the epidemiology, pathophysiology, genetic predisposition, clinical presentation, and response to treatment for select pruritic skin conditions. By addressing itch as an unmet need in African Americans, we hope to improve patient outcomes and lessen disparities in dermatologic care.
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7
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Imani D, Eslami MM, Anani-Sarab G, Aliyu M, Razi B, Rezaei R. Interleukin-4 gene polymorphism (C33T) and the risk of the asthma: a meta-analysis based on 24 publications. BMC MEDICAL GENETICS 2020; 21:232. [PMID: 33228581 PMCID: PMC7686752 DOI: 10.1186/s12881-020-01169-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 11/10/2020] [Indexed: 01/03/2023]
Abstract
BACKGROUND Previous studies evaluated the association of IL-4 C33T polymorphism and risk of bronchial asthma but failed to establish a consistent conclusive association. In the present meta-analysis, we intend to define a more reliable estimate of the association in the presence of filling published literature. METHODS An exhaustive search in Web of Science, Scopus, and PubMed databases was performed to identify all relevant publications before September 2020, and 24 publications (28 studies) with 6587 cases and 8408 controls were included in final analysis. The association between polymorphism and risk of asthma were measured by Odd ratios (ORs) and 95% confidence intervals (CIs). Moreover, Cochran's Q and the I2 statistics were used to evaluate the degree of heterogeneity between studies. RESULTS In the overall study populations, a significant positive association was detected under all genotype models and announced the IL-4 C33T polymorphism as a potential risk factor in the pathogenesis of asthma. In the subgroup analysis by age, a significant association between IL-4 C33T polymorphism and risk of asthma in different age groups was identified in allelic model, which highlighted the predisposing role of the T allele for the asthma risk in all three age groups. Furthermore, the results of subgroup analysis by continent were heterogenous. Accordingly, IL-4 C33T polymorphism was a risk factor in Europeans (all models except heterozygote comparison), Americans (all models except recessive and homozygote comparison) and Asians (just recessive and allelic model). Finally, the ethnicity-specific analysis disclosed a significant association between IL-4 C33T polymorphism and asthma risk in Caucasians (all genotype models except heterozygote comparison), while this association was not significant in African-Americans. CONCLUSIONS This study suggests that IL-4 C33T polymorphism potentially acts as a risk factor for asthma in different ethnicities and age groups.
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Affiliation(s)
- Danyal Imani
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Mohammad Masoud Eslami
- Department of Hematology, School of Medicine, Tarbiat Modares University (TMU), Tehran, Iran
| | - Gholamreza Anani-Sarab
- Cellular and Molecular Research Center, Birjand University of Medical Sciences, Birjnad, Iran
| | - Mansur Aliyu
- Department of Medical Microbiology and Parasitology, Faculty of Clinical Sciences, College of Health Science, Bayero University, Kano, Nigeria
| | - Bahman Razi
- Department of Hematology, School of Medicine, Tarbiat Modares University (TMU), Tehran, Iran
| | - Ramazan Rezaei
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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8
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Kousha A, Mahdavi Gorabi A, Forouzesh M, Hosseini M, Alexander M, Imani D, Razi B, Mousavi MJ, Aslani S, Mikaeili H. Interleukin 4 gene polymorphism (-589C/T) and the risk of asthma: a meta-analysis and met-regression based on 55 studies. BMC Immunol 2020; 21:55. [PMID: 33087044 PMCID: PMC7579954 DOI: 10.1186/s12865-020-00384-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 10/08/2020] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Numerous investigations have previously evaluated the association of interleukin (IL) 4 gene polymorphisms and the risk of asthma, conferring inconsistent results. To resolve the incongruent outcomes yielded from different single studies, we conducted the most up-to-date meta-analysis of IL4 gene -589C/T (rs2243250) polymorphism and susceptibility to asthma. METHODS A systematic literature search was performed in ISI web of science, Scopus, Medline/PubMed databases prior to September 2020, and the pooled odds ratio (OR) and their corresponding 95% CI were calculated to determine the association strength. RESULTS Literature search led to retrieving of 49 publications (55 case-control studies) containing 9572 cases and 9881 controls. It was revealed that IL4 gene -589C/T polymorphism increased the risk of asthma across all genetic models, including dominant model (OR = 1.22), recessive model (OR = 1.17), allelic model (OR = 1.21), and TT vs. CC model (OR = 1.34), but not the CT vs. TT model. The subgroup analysis by age indicated that IL4 gene -589C/T polymorphism was significantly associated with asthma risk in both pediatrics and adults. Additionally, the subgroup analysis by ethnicity revealed significant association in Asian, American, and Europeans. Finally, subgroup analysis by East Asian and non-East Asian populations indicated significant associations. CONCLUSIONS The current meta-analysis revealed that IL4 gene -589C/T polymorphism was a susceptibility risk in both pediatrics and adults in the whole and different ethnic groups.
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Affiliation(s)
- Ahmad Kousha
- Department of Health Education and Health Promotion, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Armita Mahdavi Gorabi
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Forouzesh
- Legal medicine Research Center, Legal Medicine organization, Tehran, Iran
| | - Mojgan Hosseini
- Department of Science, Islamshahr Branch, Islamic Azad University, Islamshahr, Tehran, Iran.
| | | | - Danyal Imani
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Bahman Razi
- Department of Hematology and Blood Banking, School of Medicine, Tarbiat Modares University, Tehran, Iran
| | - Mohammad Javad Mousavi
- Department of Hematology, Faculty of Allied Medicine, Bushehr University of Medical Sciences, Bushehr, Iran.,Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Saeed Aslani
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Haleh Mikaeili
- Tuberculosis and Lung Diseases Research Center, Tabriz University of Medical sciences, Tabriz, Iran.
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9
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Wong PCM, Kang X, Wong KHY, So HC, Choy KW, Geng X. ASPM-lexical tone association in speakers of a tone language: Direct evidence for the genetic-biasing hypothesis of language evolution. SCIENCE ADVANCES 2020; 6:eaba5090. [PMID: 32537487 PMCID: PMC7253162 DOI: 10.1126/sciadv.aba5090] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 03/20/2020] [Indexed: 05/12/2023]
Abstract
How language has evolved into more than 7000 varieties today remains a question that puzzles linguists, anthropologists, and evolutionary scientists. The genetic-biasing hypothesis of language evolution postulates that genes and language features coevolve, such that a population that is genetically predisposed to perceiving a particular linguistic feature would tend to adopt that feature in their language. Statistical studies that correlated a large number of genetic variants and linguistic features not only generated this hypothesis but also specifically pinpointed a linkage between ASPM and lexical tone. However, there is currently no direct evidence for this association and, therefore, the hypothesis. In an experimental study, we provide evidence to link ASPM with lexical tone perception in a sample of over 400 speakers of a tone language. In addition to providing the first direct evidence for the genetic-biasing hypothesis, our results have implications for further studies of linguistic anthropology and language disorders.
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Affiliation(s)
- Patrick C. M. Wong
- Department of Linguistics and Modern Languages, The Chinese University of Hong Kong, Shatin, Hong Kong
- Brain and Mind Institute, The Chinese University of Hong Kong, Shatin, Hong Kong
- Department of Otorhinolaryngology, Head and Neck Surgery, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Xin Kang
- Department of Linguistics and Modern Languages, The Chinese University of Hong Kong, Shatin, Hong Kong
- Brain and Mind Institute, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Kay H. Y. Wong
- Department of Linguistics and Modern Languages, The Chinese University of Hong Kong, Shatin, Hong Kong
- Brain and Mind Institute, The Chinese University of Hong Kong, Shatin, Hong Kong
- Department of Otorhinolaryngology, Head and Neck Surgery, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Hon-Cheong So
- Brain and Mind Institute, The Chinese University of Hong Kong, Shatin, Hong Kong
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Kwong Wai Choy
- Brain and Mind Institute, The Chinese University of Hong Kong, Shatin, Hong Kong
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Xiujuan Geng
- Department of Linguistics and Modern Languages, The Chinese University of Hong Kong, Shatin, Hong Kong
- Brain and Mind Institute, The Chinese University of Hong Kong, Shatin, Hong Kong
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10
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Amo G, Martí M, García-Menaya JM, Cordobés C, Cornejo-García JA, Blanca-López N, Canto G, Doña I, Blanca M, Torres MJ, Agúndez JAG, García-Martín E. Identification of Novel Biomarkers for Drug Hypersensitivity After Sequencing of the Promoter Area in 16 Genes of the Vitamin D Pathway and the High-Affinity IgE Receptor. Front Genet 2019; 10:582. [PMID: 31293618 PMCID: PMC6603231 DOI: 10.3389/fgene.2019.00582] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 06/04/2019] [Indexed: 12/16/2022] Open
Abstract
The prevalence of allergic diseases and drug hypersensitivity reactions (DHRs) during recent years is increasing. Both, allergic diseases and DHRs seem to be related to an interplay between environmental factors and genetic susceptibility. In recent years, a large effort in the elucidation of the genetic mechanisms involved in these disorders has been made, mostly based on case-control studies, and typically focusing on isolated SNPs. These studies provide a limited amount of information, which now can be greatly expanded by the complete coverage that Next Generation Sequencing techniques offer. In this study, we analyzed the promoters of sixteen genes related to the Vitamin D pathway and the high-affinity IgE receptor, including FCER1A, MS4A2, FCER1G, VDR, GC, CYP2R1, CYP27A1, CYP27B1, CYP24A1, RXRA, RXRB, RXRG, IL4, IL4R, IL13, and IL13RA1. The study group was composed of patients with allergic rhinitis plus asthma (AR+A), patients with hypersensitivity to beta-lactams (BLs), to NSAIDs including selective hypersensitivity (SH) and cross-reactivity (CR), and healthy controls without antecedents of atopy or adverse drug reactions. We identified 148 gene variations, 43 of which were novel. Multinomial analyses revealed that three SNPs corresponding to the genes FCER1G (rs36233990 and rs2070901), and GC (rs3733359), displayed significant associations and, therefore, were selected for a combined dataset study in a cohort of 2,476 individuals. The strongest association was found with the promoter FCER1G rs36233990 SNP that alters a transcription factor binding site. This SNP was over-represented among AR+A patients and among patients with IgE-mediated diseases, as compared with control individuals or with the rest of patients in this study. Classification models based on the above-mentioned SNPs were able to predict correct clinical group allocations in patients with DHRs, and patients with IgE-mediated DHRs. Our findings reveal gene promoter SNPs that are significant predictors of drug hypersensitivity, thus reinforcing the hypothesis of a genetic predisposition for these diseases.
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Affiliation(s)
- Gemma Amo
- University Institute of Molecular Pathology Biomarkers, UEx, Cáceres, Spain.,ARADyAL Instituto de Salud Carlos III, Cáceres, Spain
| | - Manuel Martí
- University Institute of Molecular Pathology Biomarkers, UEx, Cáceres, Spain.,ARADyAL Instituto de Salud Carlos III, Cáceres, Spain
| | - Jesús M García-Menaya
- Allergy Service, Badajoz University Hospital, Badajoz, Spain.,ARADyAL Instituto de Salud Carlos III, Badajoz, Spain
| | - Concepción Cordobés
- Allergy Service, Mérida Hospital, Badajoz, Spain.,ARADyAL Instituto de Salud Carlos III, Cáceres, Spain
| | - José A Cornejo-García
- Research Laboratory, IBIMA, Regional University Hospital of Málaga, UMA, Málaga, Spain.,ARADyAL Instituto de Salud Carlos III, Cáceres, Spain
| | - Natalia Blanca-López
- Allergy Service, Infanta Leonor University Hospital, Madrid, Spain.,ARADyAL Instituto de Salud Carlos III, Madrid, Spain
| | - Gabriela Canto
- Allergy Service, Infanta Leonor University Hospital, Madrid, Spain.,ARADyAL Instituto de Salud Carlos III, Madrid, Spain
| | - Inmaculada Doña
- Allergy Unit, IBIMA, Regional University Hospital of Málaga, UMA, Málaga, Spain.,ARADyAL Instituto de Salud Carlos III, Málaga, Spain
| | - Miguel Blanca
- Allergy Service, Infanta Leonor University Hospital, Madrid, Spain.,ARADyAL Instituto de Salud Carlos III, Madrid, Spain
| | - María José Torres
- Allergy Unit, IBIMA, Regional University Hospital of Málaga, UMA, Málaga, Spain.,ARADyAL Instituto de Salud Carlos III, Málaga, Spain
| | - José A G Agúndez
- University Institute of Molecular Pathology Biomarkers, UEx, Cáceres, Spain.,ARADyAL Instituto de Salud Carlos III, Cáceres, Spain
| | - Elena García-Martín
- University Institute of Molecular Pathology Biomarkers, UEx, Cáceres, Spain.,ARADyAL Instituto de Salud Carlos III, Cáceres, Spain
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11
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Lee DS, Gross E, Hotz A, Rastogi D. Comparison of severity of asthma hospitalization between African American and Hispanic children in the Bronx. J Asthma 2019; 57:736-742. [PMID: 31062634 DOI: 10.1080/02770903.2019.1609981] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Objective: There are racial and ethnic disparities in childhood asthma burden and outcomes. Although there have been comparisons between whites and minorities, there are few between minority groups. This study aimed to compare characteristics of asthma hospitalizations in African American and Hispanic children.Methods: A retrospective chart review was conducted to compare asthma characteristics between African American and Hispanic children aged 2-18 years hospitalized at an urban, tertiary care hospital for an acute asthma exacerbation. Length of stay (LOS), need for intensive care unit (ICU), and need for additional medications or respiratory support were compared between the groups.Results: Of the 925 children that met the inclusion criteria, 64% were Hispanic and 36% were African American. The groups were similar in age, gender, insurance status, and weight classification. African American children were more likely to have severe persistent asthma (12% vs. 7%, p = .02). They were also more likely to require magnesium sulfate (45% vs. 32%, p < .001) and admission to the ICU from the emergency department (ED) (14% vs. 8%, p = .01), which were independent of asthma severity. There was no significant difference in LOS or other characteristics of hospitalization.Conclusions: African American children hospitalized for asthma have more severe exacerbations compared to Hispanic children, which is independent of their asthma severity. However, this was not associated with longer LOS, which may indicate greater responsiveness to inpatient asthma management. Further investigation is needed to understand the mechanisms underlying asthma and exacerbation severity among minority groups.
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Affiliation(s)
- Diana S Lee
- Department of Pediatrics, Mount Sinai Kravis Children's Hospital, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Elissa Gross
- Department of Pediatrics, Children's Hospital at Montefiore, Bronx, NY, USA.,Albert Einstein College of Medicine, Bronx, NY, USA
| | - Arda Hotz
- Department of Pediatrics, Boston Children's Hospital, Boston, MA, USA
| | - Deepa Rastogi
- Department of Pediatrics, Children's Hospital at Montefiore, Bronx, NY, USA.,Albert Einstein College of Medicine, Bronx, NY, USA
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12
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Brunner PM, Guttman-Yassky E. Racial differences in atopic dermatitis. Ann Allergy Asthma Immunol 2019; 122:449-455. [PMID: 30465859 DOI: 10.1016/j.anai.2018.11.015] [Citation(s) in RCA: 155] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 11/04/2018] [Accepted: 11/12/2018] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To summarize studies investigating ethnical and racial differences in atopic dermatitis (AD) epidemiology, clinical features, and skin and blood phenotypes. DATA SOURCES PubMed literature review (years 2000-2018). STUDY SELECTIONS Articles discussing primarily human disease. RESULTS Higher overall rates of AD were found in Africa and Oceania as opposed to India and Northern and Eastern Europe. In the United States, AD prevalence was found to be higher in African American (19.3%) compared with European American (16.1%) children. Although several studies have consistently found FLG loss-of-function mutations in up to 50% of European and 27% of Asian patients with AD, FLG mutations were 6 times less common in African American than in European American patients, even in patients with severe AD. Thus, FLG mutations seem to play less a pathogenic role in patients of African origin than in individuals of European or Asian ancestry. The immune phenotype of all ethnic groups was characterized by strong TH2 activation, but important differences in immune polarization exist among the different ethnicities. Asian patients with AD had stronger TH17/TH22 activation than African American and European American patients with AD, whereas African American patients had the highest serum IgE levels among all groups, while largely lacking TH1 and TH17 activation. CONCLUSION AD is a heterogeneous disease that has differences among various ethnic and racial groups, which might be important for the development of future, targeted treatments and for personalized medicine approaches.
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Affiliation(s)
- Patrick M Brunner
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Emma Guttman-Yassky
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York.
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13
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Rahmoun N, El Mecherfi KE, Bouchetara A, Lardjem Hetraf S, Dahmani Amira C, Adda Neggaz L, Boudjema A, Zemani-Fodil F, Kheroua O. Association of REL Polymorphism with Cow's Milk Proteins Allergy in Pediatric Algerian Population. Fetal Pediatr Pathol 2018; 37:74-83. [PMID: 29336650 DOI: 10.1080/15513815.2017.1405468] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
INTRODUCTION Cow's milk proteins allergy (CMPA) pathogenesis involves complex immunological mechanisms with the participation of several cells and molecules involved in food allergy. The association of polymorphisms in the interleukin 4, Forkhead box P3 and the avian reticuloendotheliosis genes was investigated in an infant population with CMPA of Western Algeria. MATERIALS AND METHODS We obtained DNA and clinical data from milk allergic subjects during active phase and from a group of non-atopic control subjects. RESULTS Our findings showed that the allele G of the cRel gene intronic polymorphism at +7883 positions was significantly higher among cow's milk proteins allergic patients compared to control subjects. CONCLUSION The results of this study suggest a possible association of CMPA with cRel G+7883T polymorphism.
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Affiliation(s)
- Nesrine Rahmoun
- a Laboratoire de Génétique Moléculaire et Cellulaire , Université des Sciences et de la Technologie d'Oran-Mohamed Boudiaf -USTOMB- , Oran , Algérie.,b Département de génétique moléculaire appliquée , Faculté des Sciences et de la vie, Université des Sciences et de a Technologie d'Oran-Mohamed Boudiaf -USTOMB- , Oran , Algérie
| | - Kamel Eddine El Mecherfi
- b Département de génétique moléculaire appliquée , Faculté des Sciences et de la vie, Université des Sciences et de a Technologie d'Oran-Mohamed Boudiaf -USTOMB- , Oran , Algérie.,c Laboratoire de Physiologie de la Nutrition et Sécurité Alimentaire, Universitéd'Oran 1 Ahmed Benbella , Oran , Algérie
| | - Assia Bouchetara
- d Departement des maladies infectieuses, EHS Boukhroufa Abdelkader, Canastel , Oran , Algérie
| | - Sara Lardjem Hetraf
- a Laboratoire de Génétique Moléculaire et Cellulaire , Université des Sciences et de la Technologie d'Oran-Mohamed Boudiaf -USTOMB- , Oran , Algérie.,b Département de génétique moléculaire appliquée , Faculté des Sciences et de la vie, Université des Sciences et de a Technologie d'Oran-Mohamed Boudiaf -USTOMB- , Oran , Algérie
| | - Chahinez Dahmani Amira
- a Laboratoire de Génétique Moléculaire et Cellulaire , Université des Sciences et de la Technologie d'Oran-Mohamed Boudiaf -USTOMB- , Oran , Algérie.,b Département de génétique moléculaire appliquée , Faculté des Sciences et de la vie, Université des Sciences et de a Technologie d'Oran-Mohamed Boudiaf -USTOMB- , Oran , Algérie
| | - Leila Adda Neggaz
- b Département de génétique moléculaire appliquée , Faculté des Sciences et de la vie, Université des Sciences et de a Technologie d'Oran-Mohamed Boudiaf -USTOMB- , Oran , Algérie
| | - Abdallah Boudjema
- a Laboratoire de Génétique Moléculaire et Cellulaire , Université des Sciences et de la Technologie d'Oran-Mohamed Boudiaf -USTOMB- , Oran , Algérie.,b Département de génétique moléculaire appliquée , Faculté des Sciences et de la vie, Université des Sciences et de a Technologie d'Oran-Mohamed Boudiaf -USTOMB- , Oran , Algérie
| | - Faouzia Zemani-Fodil
- a Laboratoire de Génétique Moléculaire et Cellulaire , Université des Sciences et de la Technologie d'Oran-Mohamed Boudiaf -USTOMB- , Oran , Algérie.,b Département de génétique moléculaire appliquée , Faculté des Sciences et de la vie, Université des Sciences et de a Technologie d'Oran-Mohamed Boudiaf -USTOMB- , Oran , Algérie
| | - Omar Kheroua
- c Laboratoire de Physiologie de la Nutrition et Sécurité Alimentaire, Universitéd'Oran 1 Ahmed Benbella , Oran , Algérie
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14
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Halwani R, Vazquez-Tello A, Kenana R, Al-Otaibi M, Alhasan KA, Shakoor Z, Al-Muhsen S. Association of IL-13 rs20541 and rs1295686 variants with symptomatic asthma in a Saudi Arabian population. J Asthma 2017; 55:1157-1165. [PMID: 29211635 DOI: 10.1080/02770903.2017.1400047] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Interleukin 13 (IL-13) plays a critical pro-inflammatory role in asthma. Several single nucleotide polymorphisms (SNPs) are associated with asthma susceptibility in specific populations; however, further replicative studies in other ethnic groups are mandatory. METHODS The association between IL-13 SNPs rs762534, rs20541, rs1295686, and rs1800925 (risk alleles A, A, T, and A, respectively) and asthma predisposition in a Saudi Arabian cohort was examined via a case-control cross-sectional study. RESULTS The frequencies of alleles between asthmatics and control populations were significantly different for rs20541 and rs1295686 SNPs (p < 0.001), whereas the frequencies of genotypes between asthmatics and controls were significantly different only for rs20541. The association of the risk (minor) alleles with asthma was examined using the dominant genetic model. Individuals with at least one copy of the risk alleles A (for rs20541) and T (for rs1295686) had significantly greater odds of being asthmatic (OR = 2.13, 95% CI = 1.39-3.26, p < 0.0001; OR = 1.69, 95% CI = 1.12-2.54, p = 0.008) relative to their most common homozygous genotypes. On the other hand, the minor A alleles for rs762534 and rs1800925 were not significantly associated with asthma risk. Regarding haplotype association analysis, individuals with at least one copy of the minor "risk" allele for both rs20541 and rs1295686 (CATG and CATA, respectively) had greater odds of being asthmatic relative to CGCG haplotype; however, this trend was not statistically significant (p > 0.3). CONCLUSIONS IL-13 minor T and A alleles for rs1295686 and rs20541, respectively, were associated with significantly higher risk of asthma in the Saudi Arabian population.
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Affiliation(s)
- Rabih Halwani
- a Immunology Research Laboratory and Asthma Research Chair, College of Medicine , King Saud University , Riyadh , Saudi Arabia.,b Department of Pediatrics , College of Medicine, King Saud University , Riyadh , Saudi Arabia
| | - Alejandro Vazquez-Tello
- a Immunology Research Laboratory and Asthma Research Chair, College of Medicine , King Saud University , Riyadh , Saudi Arabia
| | - Rosan Kenana
- a Immunology Research Laboratory and Asthma Research Chair, College of Medicine , King Saud University , Riyadh , Saudi Arabia
| | - Maram Al-Otaibi
- c Department of Pathology , King Khalid University Hospital, College of Medicine, King Saud University , Riyadh , Saudi Arabia
| | - Khalid A Alhasan
- b Department of Pediatrics , College of Medicine, King Saud University , Riyadh , Saudi Arabia
| | - Zahid Shakoor
- c Department of Pathology , King Khalid University Hospital, College of Medicine, King Saud University , Riyadh , Saudi Arabia
| | - Saleh Al-Muhsen
- a Immunology Research Laboratory and Asthma Research Chair, College of Medicine , King Saud University , Riyadh , Saudi Arabia.,b Department of Pediatrics , College of Medicine, King Saud University , Riyadh , Saudi Arabia
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15
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Mei Q, Qu J. Interleukin-13 +2044 G/A and +1923C/T polymorphisms are associated with asthma susceptibility in Asians: A meta-analysis. Medicine (Baltimore) 2017; 96:e9203. [PMID: 29390465 PMCID: PMC5758167 DOI: 10.1097/md.0000000000009203] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
A number of studies have reported that the interleukin 13 (IL-13) gene is associated with asthma susceptibility. However, the reported relationships between the +2044G/A and +1923C/T polymorphisms and asthma susceptibility are inconsistent, especially in Asian adults and children with atopic status. Meta-analysis was used to analyze combined data.The +2044G/A and +1923C/T polymorphisms were investigated using data from 18 and 11 studies, respectively. The results suggested that there was an association between asthma and the IL-13 +2044G/A polymorphisms: odds ratio (OR) 1.34, 95% confidence interval (CI) 1.03-1.75 for AA versus GG + GA and +1923C/T; OR 1.50, 95% CI 1.26-1.78 for TT versus CC; and OR 1.15, 95% CI 1.10-1.21 for TC versus CC. The subgroup meta-analysis demonstrated that IL-13 +2044G/A polymorphisms are associated with asthma: OR 1.47, 95% CI 1.06-2.04 for AA versus GG + GA and +1923C/T; OR 1.70, 95% CI 1.26-2.30 for TT versus CC; and OR 1.27, 95% CI 1.03-1.56 for TC versus CC. In particular, IL-13 +2044G/A polymorphisms are specifically associated with Asian ethnicity in both adults and children with atopic status. However, the 1923C/T polymorphisms were not significantly associated with age group or atopic status within the Asian subgroups. Further investigation using larger samples and meta-analysis is required. No publication bias was detected.This meta-analysis indicates that the IL13 +2044G/A and +1923C/T polymorphisms are risk factors for asthma, especially among Asians.
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Affiliation(s)
- Quanhui Mei
- Department of Intensive Care Unit, The First People's Hospital of Changde City, Changde, Hunan
| | - Jingjing Qu
- Department of Medical Oncology, Lung Cancer and Gastrointestinal Unit, Hunan Cancer Hospital, Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, China
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16
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Clifford HD, Hayden CM, Khoo SK, Naniche D, Mandomando IM, Zhang G, Richmond P, Le Souëf PN. Genetic Variants in the IL-4/IL-13 Pathway Influence Measles Vaccine Responses and Vaccine Failure in Children from Mozambique. Viral Immunol 2017; 30:472-478. [PMID: 28594599 DOI: 10.1089/vim.2017.0014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Despite effective measles vaccines, measles still causes severe morbidity and mortality worldwide, particularly in developing countries. The Th2 pathway involving interleukin (IL)-4 and IL-13 cytokines, and their receptor IL-4Rα, play important roles in the Th1/Th2 balance and antibody production. A Th2 skewing of the cytokine milieu may affect vaccine responses. We investigated IL-4, IL-13, and IL-4Rα polymorphisms and their impact on measles IgG responses and measles vaccine failure, in two separate cohorts: 12-month-old Australian children immunized with measles-mumps-rubella vaccine (n = 137) and a case/control cohort of children aged 6 months-14 years from Mozambique, Africa (n = 89), some of whom were vaccinated, but still contracted measles (vaccine failure). We found that IL-4Rα haplotypes for Val75Ile, Ser503Pro, and Arg576Gln were associated with measles IgG in Mozambican children (p = 0.016 and p = 0.032 for Val.Pro.Arg and Val.Ser.Arg, respectively), but not Australian children. IL-4Rα 503Pro was more prevalent in Mozambique vaccine failure cases compared with controls (p = 0.008). We showed that the impact of Th2 genes on measles vaccine responses differs between ethnicities and IL-4Rα polymorphisms may work in combination to affect measles antibody responses and vaccine failure in Mozambican children. Studies in this area are particularly important in developing countries like Mozambique where measles is still a major health issue.
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Affiliation(s)
- Holly D Clifford
- 1 Telethon Kids Institute, University of Western Australia , Perth, Western Australia, Australia
| | - Catherine M Hayden
- 2 School of Pediatrics and Child Health, University of Western Australia , Perth, Western Australia, Australia
| | - Siew-Kim Khoo
- 1 Telethon Kids Institute, University of Western Australia , Perth, Western Australia, Australia .,2 School of Pediatrics and Child Health, University of Western Australia , Perth, Western Australia, Australia
| | - Denise Naniche
- 3 Centro de Investigação em Saúde da Manhiça , Manhiça, Mozambique .,4 Barcelona Centre for International Health Research (CRESIB), Universitat de Barcelona , Barcelona, Spain
| | - Inacio M Mandomando
- 3 Centro de Investigação em Saúde da Manhiça , Manhiça, Mozambique .,5 Instituto Nacional de Saúde (INS) , Ministério de Saúde, Maputo, Mozambique
| | - Guicheng Zhang
- 1 Telethon Kids Institute, University of Western Australia , Perth, Western Australia, Australia .,2 School of Pediatrics and Child Health, University of Western Australia , Perth, Western Australia, Australia
| | - Peter Richmond
- 1 Telethon Kids Institute, University of Western Australia , Perth, Western Australia, Australia .,2 School of Pediatrics and Child Health, University of Western Australia , Perth, Western Australia, Australia
| | - Peter N Le Souëf
- 1 Telethon Kids Institute, University of Western Australia , Perth, Western Australia, Australia
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17
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Association between IL-13 +1923C/T polymorphism and asthma risk: a meta-analysis based on 26 case-control studies. Biosci Rep 2017; 37:BSR20160505. [PMID: 28057889 PMCID: PMC5270317 DOI: 10.1042/bsr20160505] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 01/02/2017] [Accepted: 01/05/2017] [Indexed: 01/22/2023] Open
Abstract
Asthma is a serious and hereditary respiratory disorder affecting all age groups. Interleukin-13 (IL-13) is a central regulator of allergic inflammation. The purpose of the present study was to estimate the relationship between IL-13 +1923C/T polymorphism and asthma susceptibility. Relevant case-control studies published between January 2000 and July 2016 were searched in the online databases. Review Manage (RevMan) 5.3 was used to conduct the statistical analysis. The pooled odds ratio (OR) with its 95% confidence interval (CI) was employed to calculate the strength of association. A total of 26 articles were retrieved, including 17642 asthma patients and 42402 controls. Overall, our results found that IL-13 +1923C/T polymorphism was significantly associated with increased risk of asthma under each genetic model (P<0.00001). Subgroup analysis by ethnicity showed that alleles and genotypes of this variant correlated with asthma among Asians and Caucasians, but only TT genotype under the homozygote model in Africans. When stratified by age group, this variant highly correlated with asthma in children and moderately in adults. Furthermore, the TT, CT and CC genotypes in asthma group were all significantly associated with increased IgE levels in sera of asthma patients when compared with controls. Our results suggested that IL-13 +1923C/T polymorphism contributed to the development of asthma. Further case-control studies with more ethnicities are still needed.
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18
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Athari SS, Athari SM, Beyzay F, Movassaghi M, Mortaz E, Taghavi M. Critical role of Toll-like receptors in pathophysiology of allergic asthma. Eur J Pharmacol 2016; 808:21-27. [PMID: 27894811 DOI: 10.1016/j.ejphar.2016.11.047] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 11/21/2016] [Accepted: 11/25/2016] [Indexed: 12/11/2022]
Abstract
Allergic asthma is an airway disease, characterized by reversible bronchoconstriction, chronic inflammation of the airway, and thickness of smooth muscle in the respiratory tract. Asthma is orchestrated by an excessive Th2-adaptive immune response, in which innate immunity plays a key role. Recently TLRs have received more and more attention as they are central to orchestrate the innate immune responses. TLRs are localized as integral membrane or intracellular glycoproteins with those on the cell surface sensing microbial antigens and the ones, localized in intracellular vesicles, sensing microbial nucleic acid species. Having recognized microbial antigens, TLRs conduct the immune response towards a pro- or anti-allergy response. As a double-edged sword, they could initiate either harmful or helpful responses by the immune system in case of allergic asthma. In the current review, we will describe the role of TLRs and their signaling pathways in allergic asthma.
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Affiliation(s)
- Seyyed Shamsadin Athari
- Research Center for Food Hygiene and Safety, Shahid Sadoughi University of Medical Sciences, Yazd, Iran; Health policy Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | | | - Fateme Beyzay
- Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Masoud Movassaghi
- Department of Pathology and Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Esmaeil Mortaz
- Clinical Tuberculosis and Epidemiology Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Immunology, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Mehdi Taghavi
- Mycology Research Center, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
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19
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Gupta J, Johansson E, Bernstein JA, Chakraborty R, Khurana Hershey GK, Rothenberg ME, Mersha TB. Resolving the etiology of atopic disorders by using genetic analysis of racial ancestry. J Allergy Clin Immunol 2016; 138:676-699. [PMID: 27297995 PMCID: PMC5014679 DOI: 10.1016/j.jaci.2016.02.045] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 02/09/2016] [Accepted: 02/25/2016] [Indexed: 12/23/2022]
Abstract
Atopic dermatitis (AD), food allergy, allergic rhinitis, and asthma are common atopic disorders of complex etiology. The frequently observed atopic march from early AD to asthma, allergic rhinitis, or both later in life and the extensive comorbidity of atopic disorders suggest common causal mechanisms in addition to distinct ones. Indeed, both disease-specific and shared genomic regions exist for atopic disorders. Their prevalence also varies among races; for example, AD and asthma have a higher prevalence in African Americans when compared with European Americans. Whether this disparity stems from true genetic or race-specific environmental risk factors or both is unknown. Thus far, the majority of the genetic studies on atopic diseases have used populations of European ancestry, limiting their generalizability. Large-cohort initiatives and new analytic methods, such as admixture mapping, are currently being used to address this knowledge gap. Here we discuss the unique and shared genetic risk factors for atopic disorders in the context of ancestry variations and the promise of high-throughput "-omics"-based systems biology approach in providing greater insight to deconstruct their genetic and nongenetic etiologies. Future research will also focus on deep phenotyping and genotyping of diverse racial ancestry, gene-environment, and gene-gene interactions.
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Affiliation(s)
- Jayanta Gupta
- Division of Asthma Research, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio
| | - Elisabet Johansson
- Division of Asthma Research, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio
| | - Jonathan A Bernstein
- Division of Immunology/Allergy Section, Department of Internal Medicine, University of Cincinnati, Cincinnati, Ohio
| | - Ranajit Chakraborty
- Center for Computational Genomics, Institute of Applied Genetics, Department of Molecular and Medical Genetics, University of North Texas Health Science Center, Fort Worth, Tex
| | - Gurjit K Khurana Hershey
- Division of Asthma Research, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio
| | - Marc E Rothenberg
- Division of Allergy and Immunology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio
| | - Tesfaye B Mersha
- Division of Asthma Research, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio.
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Nakamura Y, Suzuki R, Mizuno T, Abe K, Chiba S, Horii Y, Tsuboi J, Ito S, Obara W, Tanita T, Kanno H, Yamauchi K. Therapeutic implication of genetic variants of IL13 and STAT4 in airway remodelling with bronchial asthma. Clin Exp Allergy 2016; 46:1152-61. [PMID: 26765219 DOI: 10.1111/cea.12710] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 12/31/2015] [Accepted: 01/05/2016] [Indexed: 02/01/2023]
Abstract
BACKGROUND Several gene variants identified in bronchial asthmatic patients are associated with a decrease in pulmonary function. The effects of this intervention on pulmonary function have not been fully researched. OBJECTIVE We determined the effects of high-dose inhaled corticosteroids (ICSs) on decreased pulmonary function in asthmatic Japanese patients with variants of IL13 and STAT4 during long-term treatments with low to mild doses of ICS. METHODS In this study, 411 patients with bronchial asthma who were receiving ICSs and living in Japan were recruited, were genotyped, and underwent pulmonary function tests and fibreoptic examinations. The effects of 2 years of high-dose ICSs administered to asthmatic patients who were homozygous for IL13 AA of rs20541 or STAT4 TT of rs925847 and who progressed to airway remodelling were investigated. RESULTS High-dose ICS treatment increased the pulmonary function of patients homozygous for IL13 AA of rs20541 but not of patients homozygous for STAT4 TT of rs925847. The increased concentrations of the mediators IL23, IL11, GMCSF, hyaluronic acid, IL24, and CCL8 in bronchial lavage fluid (BLF) were diminished after high-dose ICS treatment in patients homozygous for IL13 AA of rs20541. CONCLUSION AND CLINICAL RELEVANCE IL13 AA of rs20541 and STAT4 TT of rs925847 are potential genomic biomarkers for predicting lower pulmonary function. The administration of high-dose ICSs to asthmatic patients with genetic variants of IL13 AA may inhibit the advancement of airway remodelling. The genetic variants of STAT4 TT did not respond to high-dose ICSs. Therefore, using medications other than ICSs must be considered even during the initial treatment of bronchial asthma. These genetic variants may aid in the realization of personalized and phenotype-specific therapies for bronchial asthma.
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Affiliation(s)
- Y Nakamura
- Division of Pulmonary Medicine, Allergy and Rheumatology, Department of Internal Medicine, Iwate Medical University School of Medicine, Morioka, Japan
| | - R Suzuki
- Division of Pulmonary Medicine, Allergy and Rheumatology, Department of Internal Medicine, Iwate Medical University School of Medicine, Morioka, Japan
| | - T Mizuno
- Division of Pulmonary Medicine, Allergy and Rheumatology, Department of Internal Medicine, Iwate Medical University School of Medicine, Morioka, Japan
| | - K Abe
- Division of Pulmonary Medicine, Allergy and Rheumatology, Department of Internal Medicine, Iwate Medical University School of Medicine, Morioka, Japan
| | - S Chiba
- Division of Pulmonary Medicine, Allergy and Rheumatology, Department of Internal Medicine, Iwate Medical University School of Medicine, Morioka, Japan
| | - Y Horii
- Division of Pulmonary Medicine, Allergy and Rheumatology, Department of Internal Medicine, Iwate Medical University School of Medicine, Morioka, Japan
| | - J Tsuboi
- Department of Cardiovascular Surgery, Iwate Medical University School of Medicine, Morioka, Japan
| | - S Ito
- Department of Medical Oncology, Iwate Medical University School of Medicine, Morioka, Japan
| | - W Obara
- Department of Urology, Iwate Medical University School of Medicine, Morioka, Japan
| | - T Tanita
- Department of Thoracic Surgery, Iwate Medical University School of Medicine, Morioka, Japan
| | - H Kanno
- Department of Pathology, Shinshu University School of Medicine, Matsumoto, Japan
| | - K Yamauchi
- Division of Pulmonary Medicine, Allergy and Rheumatology, Department of Internal Medicine, Iwate Medical University School of Medicine, Morioka, Japan
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Accordini S, Calciano L, Bombieri C, Malerba G, Belpinati F, Lo Presti AR, Baldan A, Ferrari M, Perbellini L, de Marco R. An Interleukin 13 Polymorphism Is Associated with Symptom Severity in Adult Subjects with Ever Asthma. PLoS One 2016; 11:e0151292. [PMID: 26986948 PMCID: PMC4795623 DOI: 10.1371/journal.pone.0151292] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 02/25/2016] [Indexed: 01/13/2023] Open
Abstract
Different genes are associated with categorical classifications of asthma severity. However, continuous outcomes should be used to catch the heterogeneity of asthma phenotypes and to increase the power in association studies. Accordingly, the aim of this study was to evaluate the association between single nucleotide polymorphisms (SNPs) in candidate gene regions and continuous measures of asthma severity, in adult patients from the general population. In the Gene Environment Interactions in Respiratory Diseases (GEIRD) study (www.geird.org), 326 subjects (aged 20–64) with ever asthma were identified from the general population in Verona (Italy) between 2007 and 2010. A panel of 236 SNPs tagging 51 candidate gene regions (including one or more genes) was analysed. A symptom and treatment score (STS) and pre-bronchodilator FEV1% predicted were used as continuous measures of asthma severity. The association of each SNP with STS and FEV1% predicted was tested by fitting quasi-gamma and linear regression models, respectively, with gender, body mass index and smoking habits as potential confounders. The Simes multiple-test procedure was used for controlling the false discovery rate (FDR). SNP rs848 in the IL13 gene region (IL5/RAD50/IL13/IL4) was associated with STS (TG/GG vs TT genotype: uncorrected p-value = 0.00006, FDR-corrected p-value = 0.04), whereas rs20541 in the same gene region, in linkage disequilibrium with rs848 (r2 = 0.94) in our sample, did not reach the statistical significance after adjusting for multiple testing (TC/CC vs TT: uncorrected p-value = 0.0003, FDR-corrected p-value = 0.09). Polymorphisms in other gene regions showed a non-significant moderate association with STS (IL12B, TNS1) or lung function (SERPINE2, GATA3, IL5, NPNT, FAM13A) only. After adjusting for multiple testing and potential confounders, SNP rs848 in the IL13 gene region is significantly associated with a continuous measure of symptom severity in adult subjects with ever asthma.
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Affiliation(s)
- Simone Accordini
- Unit of Epidemiology and Medical Statistics, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
- * E-mail:
| | - Lucia Calciano
- Unit of Epidemiology and Medical Statistics, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
| | - Cristina Bombieri
- Section of Biology and Genetics, Department of Neurological, Biomedical and Movement Sciences, University of Verona, Verona, Italy
| | - Giovanni Malerba
- Section of Biology and Genetics, Department of Neurological, Biomedical and Movement Sciences, University of Verona, Verona, Italy
| | - Francesca Belpinati
- Section of Biology and Genetics, Department of Neurological, Biomedical and Movement Sciences, University of Verona, Verona, Italy
| | - Anna Rita Lo Presti
- Section of Biology and Genetics, Department of Neurological, Biomedical and Movement Sciences, University of Verona, Verona, Italy
| | - Alessandro Baldan
- Section of Biology and Genetics, Department of Neurological, Biomedical and Movement Sciences, University of Verona, Verona, Italy
| | - Marcello Ferrari
- Unit of Respiratory Medicine, Department of Medicine, University of Verona, Verona, Italy
| | - Luigi Perbellini
- Unit of Occupational Medicine, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
| | - Roberto de Marco
- Unit of Epidemiology and Medical Statistics, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
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Russell SB, Smith JC, Huang M, Trupin JS, Williams SM. Pleiotropic Effects of Immune Responses Explain Variation in the Prevalence of Fibroproliferative Diseases. PLoS Genet 2015; 11:e1005568. [PMID: 26540410 PMCID: PMC4634921 DOI: 10.1371/journal.pgen.1005568] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Many diseases are differentially distributed among human populations. Differential selection on genetic variants in ancestral environments that coincidentally predispose to disease can be an underlying cause of these unequal prevalence patterns. Selected genes may be pleiotropic, affecting multiple phenotypes and resulting in more than one disease or trait. Patterns of pleiotropy may be helpful in understanding the underlying causes of an array of conditions in a population. For example, several fibroproliferative diseases are more prevalent and severe in populations of sub-Saharan ancestry. We propose that this disparity is due to selection for an enhanced Th2 response that confers resistance to helminthic infections, and concurrently increases susceptibility to fibrosis due to the profibrotic action of Th2 cytokines. Many studies on selection of Th2-related genes for host resistance to helminths have been reported, but the pleiotropic impact of this selection on the distribution of fibrotic disorders has not been explicitly investigated. We discuss the disproportionate occurrence of fibroproliferative diseases in individuals of African ancestry and provide evidence that adaptation of the immune system has shaped the genetic structure of these human populations in ways that alter the distribution of multiple fibroproliferative diseases.
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Affiliation(s)
- Shirley B. Russell
- Vanderbilt Genetics Institute, Division of Dermatology, Department of Medicine, Vanderbilt University, Nashville, Tennessee, United States of America
- * E-mail: (SBR); , (SMW)
| | - Joan C. Smith
- Meharry Medical College, Nashville, Tennessee, United States of America
| | - Minjun Huang
- Department of Genetics, Geisel School of Medicine, Dartmouth College, Hanover, New Hampshire, United States of America
| | - Joel S. Trupin
- Meharry Medical College, Nashville, Tennessee, United States of America
| | - Scott M. Williams
- Department of Genetics, Geisel School of Medicine, Dartmouth College, Hanover, New Hampshire, United States of America
- * E-mail: (SBR); , (SMW)
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Dixit P, Awasthi S, Agarwal S. Association of interleukin genes polymorphism with asthma susceptibility in Indian children: a case-control study. Ann Hum Biol 2014; 42:552-9. [PMID: 25402004 DOI: 10.3109/03014460.2014.977347] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Interleukins (IL) 4 and 13 genes and their receptors (R) are the key cytokines which amplify inflammatory reactions in asthma. OBJECTIVE This study aimed to investigate the association of IL 4, 4 R, 13 and 13 R genes polymorphism with asthma in Indian children. METHODS In this hospital-based case-control study, included were children aged 1-15 years recruited as diagnosed cases of bronchial asthma, according to EPR 2007 and excluded were subjects with other respiratory diseases. Children with no present or past history of asthma were enrolled as controls. Spirometry was done in cases age ≥ 6 years. Gene-gene interaction was evaluated using binary logistic regression. RESULTS From October 2010 to July 2013, 275 cases and 275 controls were recruited. Gene-gene interactions between C1112T in IL 13 and Ile50Val in IL 4 R gene polymorphisms were found to be statistically significant (OR = 2.37, 95% CI = 1.04-5.42, p = 0.040). Individuals with CT and GG genotype of C1112T in IL 13 and Ile50Val in IL 4 R were at twice the risk for the development of asthma compared to individuals with both non-risk genotypes. CONCLUSION The data suggests that gene-gene interactions between IL 13 and IL 4 R genes may play an important role in asthma among Indian children.
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Affiliation(s)
- Pratibha Dixit
- a Department of Pediatrics and Translational Medicine Unit , King George's Medical University , Lucknow , India and
| | - Shally Awasthi
- a Department of Pediatrics and Translational Medicine Unit , King George's Medical University , Lucknow , India and
| | - Sarita Agarwal
- b Department of Genetics , Sanjay Gandhi Post Graduate Institute of Medical Sciences , Lucknow , India
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Antioxidant defense enzyme genes and asthma susceptibility: gender-specific effects and heterogeneity in gene-gene interactions between pathogenetic variants of the disease. BIOMED RESEARCH INTERNATIONAL 2014; 2014:708903. [PMID: 24895604 PMCID: PMC4026955 DOI: 10.1155/2014/708903] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Revised: 04/05/2014] [Accepted: 04/07/2014] [Indexed: 12/15/2022]
Abstract
Oxidative stress resulting from an increased amount of reactive oxygen species and an imbalance between oxidants and antioxidants plays an important role in the pathogenesis of asthma. The present study tested the hypothesis that genetic susceptibility to allergic and nonallergic variants of asthma is determined by complex interactions between genes encoding antioxidant defense enzymes (ADE). We carried out a comprehensive analysis of the associations between adult asthma and 46 single nucleotide polymorphisms of 34 ADE genes and 12 other candidate genes of asthma in Russian population using set association analysis and multifactor dimensionality reduction approaches. We found for the first time epistatic interactions between ADE genes underlying asthma susceptibility and the genetic heterogeneity between allergic and nonallergic variants of the disease. We identified GSR (glutathione reductase) and PON2 (paraoxonase 2) as novel candidate genes for asthma susceptibility. We observed gender-specific effects of ADE genes on the risk of asthma. The results of the study demonstrate complexity and diversity of interactions between genes involved in oxidative stress underlying susceptibility to allergic and nonallergic asthma.
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25
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Al-Muhsen S, Vazquez-Tello A, Alzaabi A, Al-Hajjaj MS, Al-Jahdali HH, Halwani R. IL-4 receptor alpha single-nucleotide polymorphisms rs1805010 and rs1801275 are associated with increased risk of asthma in a Saudi Arabian population. Ann Thorac Med 2014; 9:81-6. [PMID: 24791170 PMCID: PMC4005166 DOI: 10.4103/1817-1737.128849] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2013] [Accepted: 01/22/2014] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND The IL-4 receptor alpha subunit (IL-4Rα), when associated with the common gamma chain receptor, or the IL-13Rα1 subunit, transduces signals to STAT6 in response to IL-4 and IL-13 stimulations. This results in a number of cell-specific responses including Th2 differentiation, lymphocyte proliferation and IgE production. Given the prominent role of IL-4Rα in allergic disorders, several single-nucleotide polymorphisms (SNPs) have been found associated with asthma and other atopic disorders, including rs1805010 (I75V) and rs1801275 (Q576R) SNPs; however, lack of significant association have also been reported for some ethnic groups. The objective of this study was to determine whether IL-4Rα rs1805010 and rs1801275 polymorphisms are associated with asthma in patients from Saudi Arabia. MATERIALS AND METHODS One hundred and ninety severe asthmatic patients (11-70 years old) and 194 healthy subjects of equivalent age range were recruited for blood donation. DNA was purified and genotyping for rs1801275 and rs1805010 polymorphisms in the IL-4Rα gene was performed by PCR amplification, followed by cycle sequencing of the purified PCR fragments using BigDye chain terminator and capillary electrophoresis. RESULTS Pearson's Chi-square tests showed that the minor alleles, G, for both rs1805010 and rs1801275 SNPs, were significantly more frequent in asthmatics than in the healthy group (Yates' P < 0.05); conversely, the major alleles, A, were significantly more frequent in healthy than in asthmatics (P < 0.05). Concerning association analysis, odds for A/G-G/G genotypes were significantly higher to be associated with asthma predisposition (rs1801275: OR = 2.12; 95% CI = 1.39-3.22; P < 0.001*; rs1805010: OR = 1.6; 95% CI = 1.01-2.53; P < 0.05*; dominant model). Analysis of gender-genotype interactions, with genders nested within A/G-G/G, indicated higher odds for females than males of significant association with asthma (rs1801275: OR = 5.19, 95% CI = 2.09-12.94*; rs1805010: OR = 3.73, 95% CI = 2.06-6.74*). Rs1805010 and rs1801275 were in linkage disequilibrium (D' = 0.27; P < 0.0004*), with G-G haplotype being more frequent in asthmatics than in healthy subjects (OR = 2.43, 95% CI = 1.59-3.71*). CONCLUSIONS The risk alleles, G, of IL-4Rα rs1805010 and rs1801275 SNPs and corresponding A/G-G/G genotypes were significantly associated with asthma predisposition in asthmatics from Saudi Arabia.
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Affiliation(s)
- Saleh Al-Muhsen
- Prince Naif Center for Immunology Research, College of Medicine, King Saud University, Riyadh, Saudi Arabia
- Department of Paediatrics, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Alejandro Vazquez-Tello
- Prince Naif Center for Immunology Research, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | | | - Mohamed S. Al-Hajjaj
- Department of Internal Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | | | - Rabih Halwani
- Prince Naif Center for Immunology Research, College of Medicine, King Saud University, Riyadh, Saudi Arabia
- Department of Paediatrics, College of Medicine, King Saud University, Riyadh, Saudi Arabia
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Yoshikawa T, Kanazawa H, Fujimoto S, Hirata K. Epistatic effects of multiple receptor genes on pathophysiology of asthma - its limits and potential for clinical application. Med Sci Monit 2014; 20:64-71. [PMID: 24435185 PMCID: PMC3907491 DOI: 10.12659/msm.889754] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Accepted: 11/09/2013] [Indexed: 01/31/2023] Open
Abstract
To date, genome-wide association studies (GWAS) permit a comprehensive scan of the genome in an unbiased manner, with high sensitivity, and thereby have the potential to identify candidate genes for the prevalence or development of multifactorial diseases such as bronchial asthma. However, most studies have only managed to explain a small additional percentage of hereditability estimates, and often fail to show consistent results among studies despite large sample sizes. Epistasis is defined as the interaction between multiple different genes affecting phenotypes. By applying epistatic analysis to clinical genetic research, we can analyze interactions among more than 2 molecules (genes) considering the whole system of the human body, illuminating dynamic molecular mechanisms. An increasing number of genetic studies have investigated epistatic effects on the risk for development of asthma. The present review highlights a concept of epistasis to overcome traditional genetic studies in humans and provides an update of evidence on epistatic effects on asthma. Furthermore, we review concerns regarding recent trends in epistatic analyses from the perspective of clinical physicians. These concerns include biological plausibility of genes identified by computational statistics, and definition of the diagnostic label of 'physician-diagnosed asthma'. In terms of these issues, further application of epistatic analysis will prompt identification of susceptibility of diseases and lead to the development of a new generation of pharmacological strategies to treat asthma.
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Affiliation(s)
- Takahiro Yoshikawa
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Hiroshi Kanazawa
- Department of Respiratory Medicine, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Shigeo Fujimoto
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Kazuto Hirata
- Department of Respiratory Medicine, Osaka City University Graduate School of Medicine, Osaka, Japan
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Nie W, Zang Y, Chen J, Xiu Q. Association between interleukin-4 receptor α chain (IL4RA) I50V and Q551R polymorphisms and asthma risk: an update meta-analysis. PLoS One 2013; 8:e69120. [PMID: 23922687 PMCID: PMC3724857 DOI: 10.1371/journal.pone.0069120] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Accepted: 06/12/2013] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND The associations between the interleukin-4 receptor α chain (IL4RA) I50V and Q551R polymorphisms and asthma risk remained controversial. METHODS We searched the Pubmed, Embase, Chinese National Knowledge Infrastructure (CNKI) and Wanfang databases for studies published before February 2013. The strengths of the associations were calculated using odds ratios (ORs) with 95% confidence intervals (CIs). RESULTS A total of 50 studies were included in this meta-analysis. There was a significant association between the IL4RA I50V polymorphism and asthma risk in a dominant genetic model (OR = 1.13, 95% CI 1.04-1.23, P = 0.005). The IL4RA Q551R polymorphism was associated with a significantly elevated asthma risk in a recessive genetic model (OR = 1.46, 95% CI 1.22-1.75, P<0.0001). Subgroup analyses found that the IL4RA I50V polymorphism was significantly associated with asthma risk in Asians (OR = 1.72, 95% CI 1.31-2.25, P<0.0001), pediatric asthma risk (OR = 1.50, 95% CI 1.13-1.99, P = 0.005), and atopic asthma risk (OR = 1.88, 95% CI 1.27-2.79, P = 0.002). CONCLUSIONS The results of this meta-analysis suggested that the IL4RA I50V and Q551R polymorphisms may be risk factors for developing asthma.
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Affiliation(s)
- Wei Nie
- Department of Respiratory Disease, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, China
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Interleukin-13 +1923C/T polymorphism is associated with asthma risk: a meta-analysis. BIOMED RESEARCH INTERNATIONAL 2013; 2013:394316. [PMID: 23841068 PMCID: PMC3693103 DOI: 10.1155/2013/394316] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Accepted: 05/22/2013] [Indexed: 11/17/2022]
Abstract
There are controversies on the association between interleukin-13 (IL-13) +1923C/T polymorphism (rs1295686) and the risk of asthma. We performed this study to assess the association by the method of meta-analysis. A systematic search current to October 16, 2012, was conducted using PubMed, EMBASE, and China National Knowledge Infrastructure (CNKI) and identified ten studies comprising 13698 cases and 38209 controls. The pooled odds ratios (ORs) with 95% confidence intervals (CIs) were calculated. There was a significant association between IL-13 +1923C/T polymorphism and asthma risk in codominant model. When stratified by ethnicity, IL-13 +1923C/T polymorphism remained significantly associated with higher asthma risk in Asians and Caucasians. In the subgroup analysis by study quality, a significantly increased asthma risk was observed in high quality studies. Sensitivity analysis and cumulative analysis further strengthened the validity of the results. No publication bias was found in this meta-analysis. In conclusion, results from this meta-analysis suggested that IL-13 +1923C/T polymorphism was a risk factor of asthma.
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Nie W, Zhu Z, Pan X, Xiu Q. The interleukin-4 -589C/T polymorphism and the risk of asthma: a meta-analysis including 7,345 cases and 7,819 controls. Gene 2013; 520:22-9. [PMID: 23454622 DOI: 10.1016/j.gene.2013.02.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 12/05/2012] [Accepted: 02/13/2013] [Indexed: 11/18/2022]
Abstract
BACKGROUND A number of studies assessed the association of -589C/T polymorphism in the promoter region of interleukin-4 (IL-4) with asthma in different populations. However, the results were contradictory. A meta-analysis was conducted to investigate the association between polymorphism in the IL-4 and asthma susceptibility. METHODS Databases including Pubmed, EMBASE, Wanfang Database, China National Knowledge Infrastructure (CNKI) and Weipu Database were searched to find relevant studies. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to assess the strength of associations. RESULTS Thirty-four studies involving 7345 cases and 7819 controls were included. Overall, significant association between -589C/T polymorphism and asthma was observed for TT+CT vs. CC (OR=1.26; 95% CI 1.12-1.42; P=0.0001; I(2)=26%). In the subgroup analysis by ethnicity, significant associations were found among Asians (OR=1.36; 95% CI 1.07-1.73; P=0.01; I(2)=0%) and Caucasians (OR=1.30; 95% CI 1.09-1.54; P=0.004; I(2)=53%) but not among African Americans (OR=1.20; 95% CI 0.72-2.00; P=0.48; I(2)=48%). In the subgroup analysis by atopic status, no significant association was found among atopic asthma patients (OR=1.20; 95% CI 0.92-1.34; P=0.27; I(2)=6%) and non-atopic asthma patients (OR=0.97; 95% CI 0.73-1.28; P=0.81; I(2)=0%). CONCLUSIONS This meta-analysis suggested that the IL-4 -589C/T polymorphism was a risk factor of asthma.
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Affiliation(s)
- Wei Nie
- Department of Respiratory Disease, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai 200003, China.
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Nie W, Liu Y, Bian J, Li B, Xiu Q. Effects of polymorphisms -1112C/T and +2044A/G in interleukin-13 gene on asthma risk: a meta-analysis. PLoS One 2013; 8:e56065. [PMID: 23437086 PMCID: PMC3577847 DOI: 10.1371/journal.pone.0056065] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 01/04/2013] [Indexed: 01/13/2023] Open
Abstract
Background Associations between interleukin-13 (IL-13) polymorphisms and asthma risk remained controversial and ambiguous. Therefore, we performed a meta-analysis to assess the associations between IL-13 polymorphisms and asthma susceptibility. Methods Pubmed, EMBASE, Chinese National Knowledge Infrastructure (CNKI) and Wangfang databases were searched. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to calculate the strength of association in the random-effects model. Results Thirty-four studies were included in this meta-analysis. The results indicated that IL13 -1112C/T polymorphism was significantly associated with asthma risk (OR = 1.20, 95% CI 1.08–1.34, P = 0.0009) in a dominant genetic model. When stratifying for race, IL13 -1112C/T polymorphism exhibited increased asthma risk in Caucasians (OR = 1.30, 95% CI 1.09–1.55, P = 0.003), while no significant association was found in Asians and African Americans. In the subgroup analysis based on atopic status, significant association was observed in atopic patients (OR = 1.25, 95% CI 1.07–1.45, P = 0.004) but not in the non-atopic patients. In addition, a significant association between IL13+2044A/G polymorphism and asthma risk was observed (OR = 1.18, 95% CI 1.08–1.28, P = 0.0002). In the subgroup analysis by ethnicity, there were significant associations between IL13+2044A/G polymorphism and asthma risk in Asians (OR = 1.19, 95% CI 1.04–1.36, P = 0.01) and Caucasians (OR = 1.22, 95% CI 1.06–1.40, P = 0.005) but not in African Americans. In the subgroup analysis stratified by atopic status, a marginal significant association was found in atopic patients (OR = 1.12, 95% CI 1.00–1.26, P = 0.05). Conclusions This meta-analysis suggested that the IL13 -1112C/T and +2044A/G polymorphisms were risk factors for asthma.
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Affiliation(s)
- Wei Nie
- Department of Respiratory Disease, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, People’s Republic of China
| | - Yongan Liu
- Department of Respiratory Disease, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, People’s Republic of China
- Department of Intensive Care Medicine, No. 411 Hospital of PLA, Shanghai, People’s Republic of China
| | - Jiarong Bian
- Department of Respiratory Disease, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, People’s Republic of China
| | - Bin Li
- Department of Radiology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, People’s Republic of China
| | - Qingyu Xiu
- Department of Respiratory Disease, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, People’s Republic of China
- * E-mail:
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Tapia LI, Ampuero S, Palomino MA, Luchsinger V, Aguilar N, Ayarza E, Mamani R, Larrañaga C. Respiratory syncytial virus infection and recurrent wheezing in Chilean infants: a genetic background? INFECTION GENETICS AND EVOLUTION 2013; 16:54-61. [PMID: 23333336 DOI: 10.1016/j.meegid.2012.12.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 12/17/2012] [Accepted: 12/26/2012] [Indexed: 11/18/2022]
Abstract
UNLABELLED Respiratory syncytial virus (RSV) infection has been associated to recurrent wheezing, but pathogenic mechanisms are unclear. Interleukin-4/Interleukin-13 (IL-4/IL-13) pathway is involved in both conditions. A common host genetic susceptibility may exist in patients whom RSV will trigger severe illness and those who develop recurrent wheezing. OBJECTIVE To assess, by a candidate-gene approach, whether genetic polymorphisms in IL-4/IL-13 pathway are associated with RSV infection severity and its outcome in Chilean children. A cohort of 118 RSV-infected infants was analyzed and followed for one year. Severity of acute infection and later recurrent wheezing were characterized. Alleles and genotypes frequencies were determined for two SNP in each of the genes IL-4, IL-13 and IL-4Rα. Association tests and interaction analyses were performed. Enrollment included 60 moderate and 58 severe cases. Two SNP were found associated to severity during acute infection in IL-4Rα gene (Gln551Arg, Ile50Val). The follow up was completed in 71% of patients (84/118). Later recurrent wheezing was 54% in severe group, versus 31% in moderate cases (p=0.035). In relation to outcome, allele Ile50 in IL-4Rα was more frequent in patients with moderate disease and no wheezing outcome. A common protector genotype is proposed for Chilean children: IL-4Rα Ile/Ile. CONCLUSION Genetic variations in the host are associated to infection severity and outcome. A common genetic background might be influencing both pathologies.
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Affiliation(s)
- Lorena I Tapia
- Programa de Virología, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Chile.
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Abstract
Asthma affects nearly 300 million people worldwide. The majority respond to inhaled corticosteroid treatment with or without beta-adrenergic agonists. However, a subset of 5 to 10% with severe asthma do not respond optimally to these medications. Different phenotypes of asthma may explain why current therapies show limited benefits in subgroups of patients. Interleukin-13 is implicated as a central regulator in IgE synthesis, mucus hypersecretion, airway hyperresponsiveness, and fibrosis. Promising research suggests that the interleukin-13 pathway may be an important target in the treatment of the different asthma phenotypes.
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Wang ZD, Lian D, Shen JL, Sun R, Xu W, Xin Z, Lei L, Jin LH, Jin SD. Association between the interleukin-4, interleukin-13 polymorphisms and asthma: a meta-analysis. Mol Biol Rep 2012; 40:1365-76. [PMID: 23070918 DOI: 10.1007/s11033-012-2180-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Accepted: 10/08/2012] [Indexed: 11/25/2022]
Abstract
A numbers studies had been reported that the polymorphisms in the Interleukin 4 (IL-4) and Interleukin 13 (IL-13) genes were associated with susceptibility to asthma. However, the results were inconsistent and inconclusive. We carried out a meta-analysis of case-control genetic association studies to assess whether the combined data showed this association by using a genetic model-free approach. Thirty studies (total 12,781 asthma and 11,500 controls) for the IL-4 C-33T and C-589T, IL-13 C-1112T and G+2044A with asthma were included in the meta-analysis. The results indicated that there were an association between the IL-4 C-33T (P = 0.006) and C-589T (P = 0.04), IL-13 C-1112T (P = 0.002) and G+2044A (P = 0.04) and susceptibility to asthma. And the definition of asthma subgroup meta-analysis demonstrates that the IL-4 C-33T is not associated with nonatopic or atopic, and IL-4 C-589T and IL-13 C-1112T polymorphisms are not associated with atopic. In the ethnicity subgroup meta-analysis, the IL-4 -589T (P = 0.003) and the IL-13 -1112T (P < 0.00001) alleles are associated with asthma among Caucasian, but not on the IL-13 +2044A allele. In conclusion, IL-4 C-33T and C-589T, IL-13 C-1112T and G+2044A could be proposed as asthma susceptible SNPs. Further investigation in larger studies and meta-analysis is required.
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Affiliation(s)
- Zhen-Dong Wang
- Department of Histology and Embryology, Harbin Medical University, 194 Xuefu Road, Nangang, Harbin, 150081, Heilongjiang, China
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Diao B, Liu Y, Zhang Y, Liu Q, Lu WJ, Xu G. Functional network analysis with the subcellular location and gene ontology information in human allergic asthma. Genet Test Mol Biomarkers 2012; 16:1287-92. [PMID: 23057572 DOI: 10.1089/gtmb.2011.0325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Asthma is a chronic inflammatory disease characterized by airway hyperresponsiveness, tissue remodeling, and airflow obstruction. The pathogenesis of asthma is only partly understood, and there is an urgent need for improved therapeutic strategies for this disease. The protein-protein interaction (PPI) network has considerable promise as a tool for discovery of novel asthma therapeutic targets and their relationship. Among the genes that have been identified by PPI studies, APP, CDKN1B, and SP3 displayed up-regulated expression. Further study depicted that CDKN1B localized in the nucleus or cytoplasm could interact with GRB2 and CASP8, but SP3 localized in the nucleus could interact with histone deacetylase 1, SP1, and E2F1. We anticipate that these types of analyses will provide considerable insight into asthma pathogenesis and will provide a wealth of new molecules for downstream analyses.
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Affiliation(s)
- Bo Diao
- Wuhan General Hospital Guangzhou Military Region, Wuhan, China
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35
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Yadav A, Govindasamy GK, Naidu R. Polymorphic variants of interleukin-13 R130Q, interleukin-4 T589C, interleukin-4RA I50V, and interleukin-4RA Q576R in allergic rhinitis: A pilot study. ALLERGY & RHINOLOGY 2012; 3:e35-40. [PMID: 22852128 PMCID: PMC3404476 DOI: 10.2500/ar.2012.3.0022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The development of allergic rhinitis is considered to be caused by the complex interactions between genetic predisposition and environmental factors. Polymorphisms in the interleukin (IL)-13/4/4RA pathway have previously been shown to be associated with atopic diseases. The purpose of this study was to determine the association between IL-13 R130Q, IL-4 T589C, IL4 receptor alpha (IL-4RA) I50V, or IL-4RA Q576R polymorphisms and risk of allergic rhinitis in a hospital-based Malaysian population. A case-control pilot study was undertaken and genotyping of these polymorphisms was performed using polymerase chain reaction-restriction fragment length polymorphism on 54 allergic rhinitis patients and 45 healthy individuals. Polymorphism of IL-13 R130Q showed significant difference in genotype (p = 0.048) and allele (p = 0.002) frequencies in allergic rhinitis when compared with healthy controls. Individuals who were GA heterozygotes (adjusted odds ratio [OR(adj)] = 3.567; 95% CI, 1.211-10.509), and carriers of A allele genotype (OR(adj) = 3.686; 95% CI, 1.300-10.451) and A allele (OR(adj) = 3.071; 95% CI, 1.514-6.232) had an elevated risk of developing allergic rhinitis. The genotype and allele frequencies of IL-4 T589C, IL-4RA I50V, and IL-4RA Q576R polymorphisms were not significantly different between the allergic rhinitis patients and normal healthy individuals and did not show an associated risk with allergic rhinitis. Our findings indicate that polymorphic variant of IL-13 R130Q appears to be associated with increased risk for development of allergic rhinitis in a hospital-based Malaysian population but not IL-4 T589C, IL-4RA I50V, and IL-4RA Q576 polymorphisms. Additional studies using larger sample size are required to confirm our findings and its exact role in allergic rhinitis.
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Affiliation(s)
- Aravind Yadav
- From the Department of Pediatrics, The Brooklyn Hospital Center, Brooklyn, New York
- Department of Otorhinolaryngology, Faculty of Medicine, University of Malaya, and University Malaya Medical Center, University of Malaya, Kuala Lumpur, Malaysia, and
| | - Gopala Krishnan Govindasamy
- Department of Otorhinolaryngology, Faculty of Medicine, University of Malaya, and University Malaya Medical Center, University of Malaya, Kuala Lumpur, Malaysia, and
| | - Rakesh Naidu
- School of Medicine and Health Sciences, Monash University Sunway Campus, Jalan Lagoon Selatan, Selangor Darul Ehsan, Malaysia
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Wong PCM, Chandrasekaran B, Zheng J. The derived allele of ASPM is associated with lexical tone perception. PLoS One 2012; 7:e34243. [PMID: 22529908 PMCID: PMC3328485 DOI: 10.1371/journal.pone.0034243] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Accepted: 02/24/2012] [Indexed: 01/12/2023] Open
Abstract
The ASPM and MCPH1 genes have been implicated in the adaptive evolution of the human brain [Mekel-Bobrov N. et al., 2005. Ongoing adaptive evolution of ASPM, a brain size determinant in homo sapiens. Science 309; Evans P.D. et al., 2005. Microcephalin, a gene regulating brain size, continues to evolve adaptively in humans. Science 309]. Curiously, experimental attempts have failed to connect the implicated SNPs in these genes with higher-level brain functions. These results stand in contrast with a population-level study linking the population frequency of their alleles with the tendency to use lexical tones in a language [Dediu D., Ladd D.R., 2007. Linguistic tone is related to the population frequency of the adaptive haplogroups of two brain size genes, ASPM and microcephalin. Proc. Natl. Acad. Sci. U.S.A. 104]. In the present study, we found a significant correlation between the load of the derived alleles of ASPM and tone perception in a group of European Americans who did not speak a tone language. Moreover, preliminary results showed a significant correlation between ASPM load and hemodynamic responses to lexical tones in the auditory cortex, and such correlation remained after phonemic awareness, auditory working memory, and non-verbal IQ were controlled. As in previous studies, no significant correlation between ASPM and cognitive measures were found. MCPH1 did not correlate with any measures. These results suggest that the association between the recently derived allele of ASPM is likely to be specific and is tied to higher level brain functions in the temporal cortex related to human communication.
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Affiliation(s)
- Patrick C M Wong
- Roxelyn and Richard Pepper Department of Communication Sciences & Disorders, Northwestern University, Evanston, Illinois, United States of America.
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Wong PCM, Morgan-Short K, Ettlinger M, Zheng J. Linking neurogenetics and individual differences in language learning: the dopamine hypothesis. Cortex 2012; 48:1091-102. [PMID: 22565204 DOI: 10.1016/j.cortex.2012.03.017] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 01/27/2012] [Accepted: 03/21/2012] [Indexed: 11/19/2022]
Abstract
Fundamental advances in neuroscience have come from investigations into neuroplasticity and learning. These investigations often focus on identifying universal principles across different individuals of the same species. Increasingly, individual differences in learning success have also been observed, such that any seemingly universal principle might only be applicable to a certain extent within a particular learner. One potential source of this variation is individuals' genetic differences. Adult language learning provides a unique opportunity for understanding individual differences and genetic bases of neuroplasticity because of the large individual differences in learning success that have already been documented, and because of the body of empirical work connecting language learning and neurocognition. In this article, we review the literature on the genetic bases of neurocognition, especially studies examining polymorphisms of dopamine (DA)-related genes and procedural learning. This review leads us to hypothesize that there may be an association between DA-related genetic variation and language learning differences. If this hypothesis is supported by future empirical findings we suggest that it may point to neurogenetic markers that allow for language learning to be personalized.
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Affiliation(s)
- Patrick C M Wong
- Roxelyn and Richard Pepper Department of Communication Sciences & Disorders, Northwestern University, Evanston, IL, USA.
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Perinatal gene-gene and gene-environment interactions on IgE production and asthma development. Clin Dev Immunol 2012; 2012:270869. [PMID: 22481967 PMCID: PMC3299317 DOI: 10.1155/2012/270869] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2011] [Revised: 11/01/2011] [Accepted: 11/17/2011] [Indexed: 12/23/2022]
Abstract
Atopic asthma is a complex disease associated with IgE-mediated immune reactions. Numerous genome-wide studies identified more than 100 genes in 22 chromosomes associated with atopic asthma, and different genetic backgrounds in different environments could modulate susceptibility to atopic asthma. Current knowledge emphasizes the effect of tobacco smoke on the development of childhood asthma. This suggests that asthma, although heritable, is significantly affected by gene-gene and gene-environment interactions. Evidence has recently shown that molecular mechanism of a complex disease may be limited to not only DNA sequence differences, but also gene-environmental interactions for epigenetic difference. This paper reviews and summarizes how gene-gene and gene-environment interactions affect IgE production and the development of atopic asthma in prenatal and childhood stages. Based on the mechanisms responsible for perinatal gene-environment interactions on IgE production and development of asthma, we formulate several potential strategies to prevent the development of asthma in the perinatal stage.
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Yang H, Dong H, Dai Y, Zheng Y. Association of interleukin-13 C-1112T and G+2044A polymorphisms with asthma: a meta-analysis. Respirology 2012; 16:1127-35. [PMID: 21762457 DOI: 10.1111/j.1440-1843.2011.02021.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND AND OBJECTIVE Polymorphisms in the IL13 gene have been reported to be associated with susceptibility to asthma. However, a number of studies have shown inconsistent results. A meta-analysis was performed to investigate whether polymorphisms in the IL13 gene were associated with the risk of asthma. METHODS Searches were performed of the Medline and Chinese National Knowledge Infrastructure (CNKI) databases, covering all papers published up to 31 August 2010. A recently proposed logistic regression-based method for meta-analysis of case-control genetic association studies was used to analyse pooled data. All statistical analyses were performed using stata version 10.0 software. RESULTS The IL13 C-1112T and G+2044A polymorphisms were investigated in 10 and 14 studies, respectively. The summary estimates suggested that both these polymorphisms were associated with susceptibility to asthma. Carriers of the IL13 -1112T allele had a 38.9% increased risk of asthma compared with homozygotes (-1112CC) (odds ratio (OR) 1.389, 95% confidence interval (CI): 1.103-1.749). Carriers of the IL13+2044A allele had a 40.0% increased risk of asthma compared with homozygotes (+2044GG) (OR 1.400, 95% CI: 1.137-1.724). In a subgroup analysis by ethnicity, the IL13 -1112T allele was associated with an increased risk of asthma among Caucasians (OR 1.629, 95% CI: 1.255-2.113) but not among Asians, and the IL13+2044A allele was associated with an increased risk of asthma among Asians (OR 1.436, 95% CI: 1.101-1.873) but not among Caucasians. CONCLUSIONS This meta-analysis indicated that the IL13 C-1112T and G+2044A polymorphisms predispose to asthma. Further studies, including pooling of individual data to facilitate evaluation of gene-gene and gene-environment interactions between these IL13 gene polymorphisms and asthma susceptibility, are recommended.
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Affiliation(s)
- Haijun Yang
- National Institute for Occupational Health and Poison Control, Key Laboratory of Chemical Safety and Health, Chinese Center for Disease Control and Prevention, Beijing, China
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Transforming growth factor β signaling pathway associated gene polymorphisms may explain lower breast cancer risk in western Indian women. PLoS One 2011; 6:e21866. [PMID: 21829601 PMCID: PMC3150347 DOI: 10.1371/journal.pone.0021866] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2011] [Accepted: 06/08/2011] [Indexed: 11/19/2022] Open
Abstract
Transforming growth factor β1 (TGFB1) T29C and TGF β receptor type 1 (TGFBR1) 6A/9A polymorphisms have been implicated in the modulation of risk for breast cancer in Caucasian women. We analyzed these polymorphisms and combinations of their genotypes, in pre menopausal breast cancer patients (N = 182) and healthy women (N = 236) from western India as well as in breast cancer patients and healthy women from the Parsi community (N = 48 & 171, respectively). Western Indian women were characterized by a higher frequency of TGFB1*C allele of the TGF β T29C polymorphism (0.48 vs 0.44) and a significantly lower frequency of TGFBR1*6A allele of the TGFBR1 6A/9A polymorphism (0.02 vs 0.068, p<0.01) as compared to healthy Parsi women. A strong protective effect of TGFB1*29C allele was seen in younger western Indian women (<40 yrs; OR = 0.45, 95% CI 0.25-0.81). Compared to healthy women, the strikingly higher frequencies of low or intermediate TGF β signalers in patients suggested a strong influence of the combination of these genotypes on the risk for breast cancer in Parsi women (for intermediate signalers, OR = 4.47 95%CI 1.01-19.69). The frequency of low signalers in Parsi healthy women, while comparable to that reported in Europeans and Americans, was three times higher than that in healthy women from western India (10.6% vs 3.3%, p<0.01). These observations, in conjunction with the low incidence rate of breast cancer in Indian women compared to White women, raise a possibility that the higher frequency of TGFB1*29C allele and lower frequency of TGFBR1*6A allele may represent important genetic determinants that together contribute to a lower risk of breast cancer in western Indian women.
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Hong X, Tsai HJ, Liu X, Arguelles L, Kumar R, Wang G, Kuptsova-Clarkson N, Pearson C, Ortiz K, Bonzagni A, Apollon S, Fu L, Pongracic JA, Schleimer R, Holt PG, Bauchner H, Wang X. Does genetic regulation of IgE begin in utero? Evidence from T(H)1/T(H)2 gene polymorphisms and cord blood total IgE. J Allergy Clin Immunol 2010; 126:1059-67, 1067.e1. [PMID: 21050946 DOI: 10.1016/j.jaci.2010.08.029] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Revised: 08/11/2010] [Accepted: 08/18/2010] [Indexed: 11/19/2022]
Abstract
BACKGROUND Elucidation of early life factors is critical to understand the development of allergic diseases, especially those manifesting in early life such as food allergies and atopic dermatitis. Cord blood IgE (CBIgE) is a recognized risk factor for the subsequent development of allergic diseases. In contrast with numerous genetic studies of total serum IgE in children and adults, limited genetic studies on CBIgE have been conducted. OBJECTIVE To test the associations between functional or tagging single nucleotide polymorphisms (SNPs) in genes involved in the T(H)1/T(H)2 pathway and CBIgE in a large US inner-city birth cohort. METHODS CBIgE, measured by Phadia ImmnunoCAP, was analyzed as a continuous and a binary variable. The association of each SNP with the 2 outcomes was tested using tobit and logistic regression models, respectively, with adjustment for pertinent covariates, ancestral proportion, and multiple testing. Ethnic heterogeneity and gene-gene interactions were also explored. RESULTS Three SNPs (rs1800925, rs2069743, and rs1295686) in the IL13 gene were significantly associated with CBIgE concentration (P ≤ 6 × 10(-4), FDR-corrected P < .05). These SNPs jointly influenced CBIgE in a dose-response manner (P for trend = 9 × 10(-8)). Significant associations also were observed for SNPs in the IL-13 receptor α1 (rs5956080) and signal transducer and activator of transcription 6 (rs11172106) genes. Ethnicity-specific genetic effects were observed for SNPs in the IL5 and GATA3 genes. Several gene-gene interactions (including IL13-IL4 receptor and IL13-signal transducer and activator of transcription 6 interactions) were detected in relation to CBIgE. CONCLUSION Our data demonstrated that multiple SNPs were individually and jointly associated with CBIgE, with evidence of gene-gene interactions and ethnic heterogeneity. These findings suggest that genetic regulation of IgE may begin in utero.
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Affiliation(s)
- Xiumei Hong
- Mary Ann and J. Milburn Smith Child Health Research Program, Children's Memorial Hospital and Children's Memorial Research Center, Chicago, Ill 60614-3394, USA
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Nawijn MC, Piavaux BJA, Jeurink PV, Gras R, Reinders MA, Stearns T, Foote S, Hylkema MN, Groot PC, Korstanje R, Oosterhout AJMV. Identification of the Mhc region as an asthma susceptibility locus in recombinant congenic mice. Am J Respir Cell Mol Biol 2010; 45:295-303. [PMID: 20971879 DOI: 10.1165/rcmb.2009-0369oc] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Mouse models of allergic asthma are characterized by airway hyperreactivity (AHR), Th2-driven eosinophilic airway inflammation, high allergen-specific IgE (anti-OVA IgE) levels in serum, and airway remodeling. Because asthma susceptibility has a strong genetic component, we aimed to identify new asthma susceptibility genes in the mouse by analyzing the asthma phenotypes of the Leishmania major resistant (lmr) recombinant congenic (RC) strains. The lmr RC strains are derived from C57BL/6 and BALB/c intercrosses and carry congenic loci on chromosome 17 (lmr1) and 9 (lmr2) in both backgrounds. Whereas the lmr2 locus on chromosome 9 contributes to a small background-specific effect on anti-OVA IgE and AHR, the lmr1 locus on chromosome 17 mediates a strong effect on Th2-driven eosinophilic airway inflammation and background-specific effects on anti-OVA IgE and AHR. The lmr1 locus contains almost 600 polymorphic genes. To narrow down this number of candidate genes, we performed genome-wide transcriptional profiling on lung tissue from C.lmr1 RC mice and BALB/c control mice. We identified a small number of differentially expressed genes located within the congenic fragment, including a number of Mhc genes, polymorphic between BALB/c and C57Bl/6. The analysis of asthma phenotypes in the C.B10-H2b RC strain, carrying the C57Bl/6 haplotype of the Mhc locus in a BALB/c genetic background, reveals a strikingly similar asthma phenotype compared with C.lmr1, indicating that the differentially expressed genes located within the C.B10-H2b congenic fragment are the most likely candidate genes to contribute to the reduced asthma phenotypes associated with the C57Bl/6 allele of lmr1.
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Affiliation(s)
- Martijn C Nawijn
- Laboratory of Allergology & Pulmonary Diseases, Department of Pathology and Medical Biology, GRIAC Research Institute, University Medical Centre Groningen, University of Groningen, the Netherlands
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Heinzmann A, Brugger M, Bierbaum S, Mailaparambil B, Kopp MV, Strauch K. Joint influences of Acidic-Mammalian-Chitinase with Interleukin-4 and Toll-like receptor-10 with Interleukin-13 in the genetics of asthma. Pediatr Allergy Immunol 2010; 21:e679-86. [PMID: 20444155 DOI: 10.1111/j.1399-3038.2010.01053.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In the genetics of asthma, single genetic polymorphisms confer only a small individual risk factor. Haplotype-based association analyses, including joint analyses of several candidate genes, might therefore yield more convincing results than single-region statistics. We set out to test for joint influences of asthma genes previously identified in our study population that is acidic mammalian chitinase (AMCase), Toll-like receptor (TLR)-10, and the interleukins IL-4, IL-13, IL-8, and IL-15. In particular, we investigated whether haplotypes at two or three genes show stronger association with the trait than at a single gene alone. We genotyped 26 polymorphisms in 321 asthmatic children and 270 controls. Haplotype-based association analyses were performed by the program FAMHAP. Single-, two-, and three-gene analyses were conducted as well as conditional analyses for pairs of genes. In the two-region analyses, best evidence was found for a joint effect on asthma for AMCase and IL-4 (p(raw) < 5 x 10(-7)) as well as AMCase and IL-13 (p(raw) = 5 x 10(-7)). Besides, IL-13 and TLR-10 showed a stronger two-gene result (p(raw) = 0.001607) than the respective single-gene analyses. Conditional analyses yielded similar results for these two-gene combinations and also revealed mutual additional effects for IL-13 and IL-4 (p(stratified) = 0.014831 and 0.001525, respectively). The most significant results demonstrate a joint effect of AMCase with IL-4 or IL-13 on the trait. Furthermore, additional mutual effects were seen for AMCase and IL-4 as well as for TLR-10 and IL-13. The corresponding pathways might therefore be of particular importance in the genetics of asthma. Further studies are needed to elucidate the functional importance of these gene-gene effects and their precise role in asthma pathogenesis.
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Affiliation(s)
- Andrea Heinzmann
- Centre for Pediatrics and Adolescent Medicine, University of Freiburg, Freiburg, Germany.
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Burgos PI, Causey ZL, Tamhane A, Kelley JM, Brown EE, Hughes LB, Danila MI, van Everdingen A, Conn DL, Jonas BL, Callahan LF, Smith EA, Brasington RD, Moreland LW, van der Heijde DM, Alarcón GS, Bridges SL. Association of IL4R single-nucleotide polymorphisms with rheumatoid nodules in African Americans with rheumatoid arthritis. Arthritis Res Ther 2010; 12:R75. [PMID: 20444266 PMCID: PMC2911851 DOI: 10.1186/ar2994] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2010] [Revised: 04/22/2010] [Accepted: 05/05/2010] [Indexed: 02/10/2023] Open
Abstract
INTRODUCTION To determine whether IL4R single-nucleotide polymorphisms (SNPs) rs1805010 (I50V) and rs1801275 (Q551R), which have been associated with disease severity in rheumatoid arthritis (RA) patients of European ancestry, relate to the presence of rheumatoid nodules and radiographic erosions in African Americans. METHODS Two IL4R SNPs, rs1805010 and rs1801275, were genotyped in 749 patients from the Consortium for Longitudinal Evaluation of African-Americans with Early Rheumatoid Arthritis (CLEAR) registries. End points were rheumatoid nodules defined as present either by physical examination or by chest radiography and radiographic erosions (radiographs of hands/wrists and feet were scored using the modified Sharp/van der Heijde system). Statistical analyses were performed by using logistic regression modeling adjusted for confounding factors. RESULTS Of the 749 patients with RA, 156 (20.8%) had rheumatoid nodules, with a mean age of 47.0 years, 84.6% female gender, and median disease duration of 1.9 years. Of the 461 patients with available radiographic data, 185 (40.1%) had erosions (score>0); their mean age was 46.7 years; 83.3% were women; and median disease duration was 1.5 years. Patients positive for HLA-DRB1 shared epitope (SE) and autoantibodies (rheumatoid factor (RF) or anti-cyclic citrullinated peptide (CCP)) had a higher risk of developing rheumatoid nodules in the presence of the AA and AG alleles of rs1801275 (odds ratio (OR)adj=8.08 (95% confidence interval (CI): 1.60-40.89), P=0.01 and ORadj=2.97 (95% CI, 1.08 to 8.17), P=0.04, respectively). Likewise, patients positive for the HLA-DRB1 SE and RF alone had a higher risk of developing rheumatoid nodules in presence of the AA and AG alleles of rs1801275 (ORadj=8.45 (95% CI, 1.57 to 45.44), P=0.01, and ORadj=3.57 (95% CI, 1.18 to 10.76), P=0.02, respectively) and in the presence of AA allele of rs1805010 (ORadj=4.52 (95% CI, 1.20 to 17.03), P=0.03). No significant association was found between IL4R and radiographic erosions or disease susceptibility, although our statistical power was limited by relatively small numbers of cases and controls. CONCLUSIONS We found that IL4R SNPs, rs1801275 and rs1805010, are associated with rheumatoid nodules in autoantibody-positive African-American RA patients with at least one HLA-DRB1 allele encoding the SE. These findings highlight the need for analysis of genetic factors associated with clinical RA phenotypes in different racial/ethnic populations.
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Affiliation(s)
- Paula I Burgos
- University of Alabama, Tuscaloosa, Alabama 35487, USA
- Department of Clinical Immunology and Rheumatology, School of Medicine, Pontificia Universidad Católica de Chile, Avenida Libertador Bernardo O'Higgins 340, Santiago, Chile
| | | | | | | | | | | | | | - Amalia van Everdingen
- Department of Clinical Immunology and Rheumatology, School of Medicine, Pontificia Universidad Católica de Chile, Avenida Libertador Bernardo O'Higgins 340, Santiago, Chile
| | - Doyt L Conn
- Emory University, 571 Kilgo Circle, Atlanta, GA 30322-1120, USA
| | - Beth L Jonas
- University of North Carolina at Chapel Hill, 130 Mason Farm Road, Chapel Hill, NC, USA
| | - Leigh F Callahan
- University of North Carolina at Chapel Hill, 130 Mason Farm Road, Chapel Hill, NC, USA
| | - Edwin A Smith
- Medical University of South Carolina, Jonathan Lucas Street, Charleston, SC29425, USA
| | - Richard D Brasington
- Washington University in St. Louis, 4444 Forest Park Avenue, St Louis, MO 63108-2259, USA
| | - Larry W Moreland
- University of Alabama, Tuscaloosa, Alabama 35487, USA
- Current address: The University of Pittsburgh, Pittsburgh, PA 15260, USA
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Abstract
BACKGROUND Leukotrienes play an important role in allergic and inflammatory diseases, but reports on the involvement of arachidonate 5-lipoxygenase-activating protein (ALOX5AP) and leukotriene A(4) hydrolase (LTA4H) in asthma have been inconclusive. OBJECTIVE To determine whether polymorphisms in ALOX5AP and LTA4H genes are risk factors for asthma in two different Latino groups: Mexicans and Puerto Ricans. METHODS The LTA4H gene was sequenced in individuals from both groups to identify novel polymorphisms. Single-nucleotide polymorphisms (SNPs) in the ALOX5AP and LTA4H genes were analysed for associations with asthma and asthma-related phenotypes in 687 parent-child trios of Mexican and Puerto Rican origin. RESULTS In LTA4H, five previously unknown polymorphisms were identified. Two SNPs within LTA4H (rs17525488 and rs2540493) were protective for asthma in Latinos (P=0.007 and 0.05, respectively). Among the Mexican patients, LTA4H polymorphisms were associated with baseline lung function and IgE levels. For ALOX5AP, the minor allele at SNP rs10507391 was associated with protection from asthma (odds ratio=0.78, P=0.02) and baseline lung function (P=0.018) in Puerto Ricans. A gene-gene interaction was identified between LTA4H (rs17525488) and ALOX5AP (rs10507391), (P=0.003, in the combined sample). CONCLUSION Our results support the role of LTA4H and ALOX5AP variants as risk factors for asthma in Latino populations.
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Naylor MG, Weiss ST, Lange C. Recommendations for using standardised phenotypes in genetic association studies. Hum Genomics 2009; 3:308-19. [PMID: 19706362 PMCID: PMC3525193 DOI: 10.1186/1479-7364-3-4-308] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Genetic association studies of complex traits often rely on standardised quantitative phenotypes, such as percentage of predicted forced expiratory volume and body mass index to measure an underlying trait of interest (eg lung function, obesity). These phenotypes are appealing because they provide an easy mechanism for comparing subjects, although such standardisations may not be the best way to control for confounders and other covariates. We recommend adjusting raw or standardised phenotypes within the study population via regression. We illustrate through simulation that optimal power in both population- and family-based association tests is attained by using the residuals from within-study adjustment as the complex trait phenotype. An application of family-based association analysis of forced expiratory volume in one second, and obesity in the Childhood Asthma Management Program data, illustrates that power is maintained or increased when adjusted phenotype residuals are used instead of typical standardised quantitative phenotypes.
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Affiliation(s)
- Melissa G Naylor
- Department of Biostatistics, Harvard University, Boston, MA, USA.
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Tachdjian R, Mathias C, Al Khatib S, Bryce PJ, Kim HS, Blaeser F, O'Connor BD, Rzymkiewicz D, Chen A, Holtzman MJ, Hershey GK, Garn H, Harb H, Renz H, Oettgen HC, Chatila TA. Pathogenicity of a disease-associated human IL-4 receptor allele in experimental asthma. ACTA ACUST UNITED AC 2009; 206:2191-204. [PMID: 19770271 PMCID: PMC2757875 DOI: 10.1084/jem.20091480] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Polymorphisms in the interleukin-4 receptor α chain (IL-4Rα) have been linked to asthma incidence and severity, but a causal relationship has remained uncertain. In particular, a glutamine to arginine substitution at position 576 (Q576R) of IL-4Rα has been associated with severe asthma, especially in African Americans. We show that mice carrying the Q576R polymorphism exhibited intense allergen-induced airway inflammation and remodeling. The Q576R polymorphism did not affect proximal signal transducer and activator of transcription (STAT) 6 activation, but synergized with STAT6 in a gene target– and tissue-specific manner to mediate heightened expression of a subset of IL-4– and IL-13–responsive genes involved in allergic inflammation. Our findings indicate that the Q576R polymorphism directly promotes asthma in carrier populations by selectively augmenting IL-4Rα–dependent signaling.
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Affiliation(s)
- Raffi Tachdjian
- Division of Immunology, Allergy, and Rheumatology, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
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Hopkin J. Immune and genetic aspects of asthma, allergy and parasitic worm infections: evolutionary links. Parasite Immunol 2009; 31:267-73. [PMID: 19388947 DOI: 10.1111/j.1365-3024.2009.01104.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
There are important parallels in the immunobiology of allergy and asthma, and of the human host's response to parasitic worms. Th-2 immune actions with 'weep and sweep' mucosal biology are common to both - pathological in the first and protective in the second. Common up-regulating genetic variants of Th-2 immunity, notably in IL13 and STAT6, predict increased risk of asthma and allergy, but diminished intensity of infection by Ascaris and Schistosoma. Endemic exposures of humans to parasitic worms may have been one evolutionary force selecting for genetic variants that promote asthma and allergy.
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Affiliation(s)
- J Hopkin
- Institute of Life Science, School of Medicine, Swansea University, Swansea, UK.
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Roth M, Black JL. An imbalance in C/EBPs and increased mitochondrial activity in asthmatic airway smooth muscle cells: novel targets in asthma therapy? Br J Pharmacol 2009; 157:334-41. [PMID: 19371343 DOI: 10.1111/j.1476-5381.2009.00188.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The asthma prevalence was increasing over the past two decades worldwide. Allergic asthma, caused by inhaled allergens of different origin or by food, is mediated by inflammatory mechanisms. The action of non-allergic asthma, induced by cold air, humidity, temperature or exercise, is not well understood. Asthma affects up to 15% of the population and is treated with anti-inflammatory and muscle relaxing drugs which allow symptom control. Asthma was first defined as a malfunction of the airway smooth muscle, later as an imbalanced immune response of the lung. Recent studies placed the airway smooth muscle again into the focus. Here we summarize the molecular biological basis of the deregulated function of the human airway smooth muscle cell as a cause or important contributor to the pathology of asthma. In the asthmatic human airway smooth muscle cells, there is: (i) a deregulation of cell differentiation due to low levels of maturation-regulating transcription factors such as CCAAT/enhancer binding proteins and peroxisome proliferator-activated receptors, thereby reducing the cells threshold to proliferate and to secrete pro-inflammatory cytokines under certain conditions; (ii) a higher basal energy turnover that is due to increased number and activity of mitochondria; and (iii) a modified feedback mechanism between cells and the extracellular matrix they are embedded in. All these cellular pathologies are linked to each other and to the innate immune response of the lung, but the sequence of events is unclear and needs further investigation. However, these findings may present the basis for the development of novel curative asthma drugs.
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Affiliation(s)
- Michael Roth
- Pulmonary Cell Research, Pneumology, University Hospital Basel, Biomedicine, Lab 305, Petersgraben 4, Basel CH-4031, Switzerland.
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50
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Scola L, Giacalone A, Marasà L, Mirabile M, Vaccarino L, Forte GI, Giannitrapani L, Caruso C, Montalto G, Lio D. Genetic determined downregulation of both type 1 and type 2 cytokine pathways might be protective against pancreatic cancer. Ann N Y Acad Sci 2009; 1155:284-8. [PMID: 19250218 DOI: 10.1111/j.1749-6632.2008.03686.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Many cytokine polymorphisms have been studied for associations with susceptibility to breast, gastric, liver, lung, prostate, and ovarian cancer without conclusive results. The cytokine network, indeed, is characterized by complex interactions, and the final biological effect of a single genetic variation depends on the balance among different molecular signals. As is well known, Th1/Th2 cytokine unbalanced production might predispose to different pathologies, cancer included. In general, a prolonged type 1 inflammatory response might allow that cells accumulating enough "genetic hits" are promoted to neoplastic transformation. On the other hand, IL-13-producing cells through the IL-13/IL-4 receptor-alpha (R-alpha) pathway might facilitate escape from tumor immunosurveillance. Here are reported data on the evaluation of the influence of some type 2 and type 1 cytokine genetic polymorphisms as risk factors for pancreatic cancer. There was no overall association between pancreatic cancer risk and single cytokine SNPs. On the other hand, in evaluating the influence of combined cytokine genotypes we found that the combined IL-10-1082GA heterozygous and IL-4 Ralpha-1902AA homozygous genotype is underrepresented in the pancreatic cancer subject group. As is well known, the IL-10-1082GA genotype is associated with an intermediate production of this regulatory cytokine, whereas the IL-10-1902AA genotype of the IL-4Ralpha gene is associated with a reduced efficiency in signal transduction when the receptor is engaged by IL-13 or IL-4. These results strongly suggest that a genetic background associated to a mild downregulation of type 1 and type 2 inflammatory signals might be protective against pancreatic cancer.
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Affiliation(s)
- Letizia Scola
- Cattedra di Patologia Clinica, General Pathology Section, Department of Pathobiology and Biomedical Methodologies, University of Palermo, Corso Tuköry, Palermo, Italy
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