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Mutli E, Mändar R, Koort K, Salumets A, Team EBR, Laisk T. Genome-wide association study in Estonia reveals importance of vaginal epithelium associated genes in case of recurrent vaginitis. J Reprod Immunol 2024; 162:104216. [PMID: 38377669 DOI: 10.1016/j.jri.2024.104216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 12/13/2023] [Accepted: 02/11/2024] [Indexed: 02/22/2024]
Abstract
Recurrent vaginitis is a leading reason for visiting a gynaecologist, with bacterial vaginosis (BV) and vulvovaginal candidiasis (VVC) being the most common diagnoses. Reasons and mechanisms behind their recurrent nature are poorly understood. We conducted a genome-wide association study (GWAS) to find possible genetic risk factors for recurrent vaginitis using data from a large population-based biobank, the Estonian Biobank. The study included 6870 cases (at least two episodes of vaginitis) and 5945 controls (no vaginitis episodes). GWAS approach included single marker and gene-based analyses, followed by functional annotation of associated variants and candidate gene mapping.In single marker analysis, one statistically significant (P = 7.8 × 10-9) variant rs1036732378 was identified on chromosome 10. The gene-based association analysis identified one gene, KRT6A, that exceeded the recommended significance threshold (P = 2.6 × 10-6). This is a member of the keratin protein family and is expressed during differentiation in epithelial tissues.Functional mapping and annotation of genetic associations by using adjusted significance level identified 22 potential risk loci that may be associated with recurrent vaginitis phenotype. Comparison of our results with previous studies provided nominal support for LBP (associated with immune response to vaginal bacteria) and PRKCH genes (possible role in keratinocyte differentiation and susceptibility to candidiasis).In conclusion, this study is the first highlighting a potential role of the vaginal epithelium in recurrent vaginitis.
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Affiliation(s)
- Evelin Mutli
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia
| | - Reet Mändar
- Department of Microbiology, Institute of Biomedicine and Translational Medicine, University of Tartu, Tartu, Estonia.
| | - Kairi Koort
- School of Natural Sciences and Health, Tallinn University, Tallinn, Estonia
| | - Andres Salumets
- Competence Centre on Health Technologies, Tartu, Estonia; Institute of Clinical Medicine, Department of Obstetrics and Gynecology, University of Tartu, Tartu, Estonia; Division of Obstetrics and Gynecology, Department of Clinical Science, Intervention and Technology, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | | | - Triin Laisk
- Institute of Genomics, University of Tartu, Tartu, Estonia
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2
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Zacher C, Schönfelder K, Rohn H, Siffert W, Möhlendick B. The single nucleotide polymorphism rs4986790 (c.896A>G) in the gene TLR4 as a protective factor in corona virus disease 2019 (COVID-19). Front Immunol 2024; 15:1355193. [PMID: 38433829 PMCID: PMC10904585 DOI: 10.3389/fimmu.2024.1355193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 01/29/2024] [Indexed: 03/05/2024] Open
Abstract
Background and aims Several factors, such as hypertension and diabetes mellitus, are known to influence the course of coronavirus disease 2019 (COVID-19). However, there is currently little information on genetic markers that influence the severity of COVID-19. In this study, we specifically investigated the single nucleotide polymorphism (SNP) rs4986790 in the TLR4 gene to identify a universal marker for preclinical prediction of COVID-19 disease progression. Methods We analyzed the influence of demographics, pre-existing conditions, inflammatory parameters at the time of hospitalization, and TLR4 rs4986790 genotype on the outcome of COVID-19 in a comprehensive cohort (N = 1570). We performed multivariable analysis to investigate the impact of each factor. Results We confirmed that younger patient age and absence of pre-existing conditions were protective factors against disease progression. Furthermore, when comparing patients with mild SARS-CoV-2 infection with patients who required hospitalization or intensive care or even died due to COVID-19, the AG/GG genotype of TLR4 rs4986790 was found to be a protective factor against COVID-19 disease progression (OR: 0.51, 95% CI: 0.34 - 0.77, p = 0.001). In addition, we demonstrated that low levels of interleukin-6 (IL-6) and procalcitonin (PCT) had a favorable effect on COVID-19 disease severity. In the subsequent multivariable analysis, we confirmed the absence of cardiovascular disease, low levels of IL-6 and PCT, and TLR4 rs4986790 AG/GG genotypes as independent predictors of potential hospitalization and reduction of severe or fatal disease course. Conclusion In this study, we identified an additional genetic factor that may serve as an invariant predictor of COVID-19 outcome. The TLR4 rs4986790 AG/GG genotype reduced by half the risk of COVID-19 patients requiring hospitalization, intensive care or to have a fatal outcome. In addition, we were able to confirm the influence of previously known factors such as pre-existing conditions and inflammatory markers upon the onset of disease on the course of COVID-19. Based on these observations, we hereby provide another prognostic biomarker that could be used in routine diagnostics as a predictive factor for the severity of COVID-19 prior to SARS-CoV-2 infection.
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Affiliation(s)
- Christoph Zacher
- Institute of Pharmacogenetics, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Kristina Schönfelder
- Department of Nephrology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Hana Rohn
- Department of Infectious Diseases, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Winfried Siffert
- Institute of Pharmacogenetics, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Birte Möhlendick
- Institute of Pharmacogenetics, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
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3
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Rodríguez-García R, Vazquez-Villamar M, Aparicio-Ozores G, Parra-Rojas I, Radilla-Vázquez RB, Castro-Alarcón N. TLR4 polymorphism and haplotype are associated with obesity and lipid profile in young population: a pilot study. J Endocrinol Invest 2023; 46:903-913. [PMID: 36454439 DOI: 10.1007/s40618-022-01950-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 10/22/2022] [Indexed: 12/03/2022]
Abstract
BACKGROUND The single nucleotide polymorphisms in the TLR4 gene can decrease or increase the response to lipopolysaccharide, increasing the susceptibility to inflammatory diseases, affecting the expression or receptor function by inducing a low-grade chronic inflammatory response. PURPOSE The objective of this study was to evaluate the association of SNPs - 2570 A > G (rs2737190), - 2081 G > A (rs10983755), 896 A > G (rs 4986790), and 1196 C > T (rs4986791) of the TLR4 gene with obesity and metabolic alterations in the young population. RESULTS In this study, it was found that the carriers of the heterozygous genotype of the SNPs - 2081 G > A, 896 A > G, and 1196 C > T confer a higher risk of developing obesity (OR = 3.73, p = 0.018; OR = 5.66, p = 0.014, and OR = 8.95, p = 0.014, respectively). Also, with the lipid profile, the SNP - 2081 G > A was associated with total cholesterol (TC) ≥ 200 mg/dL (OR = 3.91, p = 0.020) and Kannel index > 3% (OR = 4.00, p = 0.008). The SNP 896 A > G was associated with LDL-c ≥ 100 mg/dL (OR = 3.64, p = 0.040) and Kannel index > 3% (OR = 4.33, p = 0.016), and the SNP 1196 C > T was associated with TC ≥ 200 mg/dL (OR = 4.37, p = 0.048), Castelli index > 4.5/> 5% (OR = 5.33, p = 0.016), and Kannel index > 3% (OR = 16.00, p = 0.001). Finally, the AGGT haplotype was associated with Castelli index > 4.5/> 5% (OR = 5.40, p = 0.015) and Kannel index > 3% (OR = 10.46, p < 0.001), and the AAAC haplotype was associated with obesity (OR = 3.56, p = 0.020), TC ≥ 200 mg/dL (OR = 4.04, p = 0.007), LDL-c ≥ 100 mg/dL (OR = 2.98, p = 0.030) and Kannel index > 3% (OR = 4.20, p = 0.002). CONCLUSION The heterozygous genotype of the SNPs - 2081 G > A, 896 A > G and 1196 C > T of the TLR4 gene was associated with altered lipid profile and development of obesity in young university students of Guerrero State, Mexico.
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Affiliation(s)
- R Rodríguez-García
- Laboratorio de Clínico, Instituto Mexicano del Seguro Social, Hospital General Regional, #1. Av. Plan de Ayala S/N, C.P. 62450, Cuernavaca Morelos, Mexico
| | - M Vazquez-Villamar
- Laboratorio de Investigación en Microbiología. Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, México. Av. Lázaro Cárdenas S/N, Ciudad Universitaria Sur Col. Haciendita, C. P. 39090, Chilpancingo, Guerrero, México
| | - G Aparicio-Ozores
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional. Avenida Plan de Ayala S/N, Col., C. P. 39610, Ciudad de México, México
| | - I Parra-Rojas
- Laboratorio de Investigación en Obesidad y Diabetes. Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, Guerrero, México
| | - R B Radilla-Vázquez
- Programa de la Doctorado en Ciencias Biomédicas. Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, México. Av. Lázaro Cárdenas S/N, Ciudad Universitaria, C. P. 39090, Chilpancingo, Guerrero, México
| | - N Castro-Alarcón
- Laboratorio de Investigación en Microbiología. Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, México. Av. Lázaro Cárdenas S/N, Ciudad Universitaria Sur Col. Haciendita, C. P. 39090, Chilpancingo, Guerrero, México.
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Silva MJA, Santana DS, de Oliveira LG, Monteiro EOL, Lima LNGC. The relationship between 896A/G (rs4986790) polymorphism of TLR4 and infectious diseases: A meta-analysis. Front Genet 2022; 13:1045725. [PMID: 36506333 PMCID: PMC9729345 DOI: 10.3389/fgene.2022.1045725] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 11/10/2022] [Indexed: 11/25/2022] Open
Abstract
Toll-like Receptors (TLRs), such as the TLR4, are genes encoding transmembrane receptors of the same name, which induce a pro- or anti-inflammatory response according to their expression as the host's first line of defense against pathogens, such as infectious ones. Single nucleotide polymorphisms (SNPs) are the most common type of mutation in the human genome and can generate functional modification in genes. The aim of this article is to review in which infectious diseases there is an association of susceptibility or protection by the TLR4 SNP rs4986790. A systematic review and meta-analysis of the literature was conducted in the Science Direct, PUBMED, MEDLINE, and SciELO databases between 2011 and 2021 based on the dominant genotypic model of this SNP for general and subgroup analysis of infectious agent type in random effect. Summary odds ratios (ORs) and corresponding 95% confidence intervals (CIs) were calculated for genotypic comparison. I2 statistics were calculated to assess the presence of heterogeneity between studies and funnel plots were inspected for indication of publication bias. A total of 27 articles were included, all in English. Among the results achieved, the categories of diseases that were most associated with the SNP studied were in decreasing order of number of articles: infections by bacteria (29.63%); caused by viruses (22.23%); urinary tract infection-UTI (7.4%), while 11 studies (40.74%) demonstrated a nonsignificant association. In this meta-analysis, a total of 5599 cases and 5871 controls were finalized. The present meta-analysis suggests that there is no significant association between TLR4-rs4986790 SNP and infections (OR = 1,11; 95% CI: 0,75-1,66; p = 0,59), but in the virus subgroup it was associated with a higher risk (OR = 2,16; 95% CI: 1,09-4,30; p = 0,03). The subgroups of bacteria and parasites did not show statistical significance (OR = 0,86; 95% CI: 0,56-1,30; p = 0,47, and no estimate of effects, respectively). Therefore, it has been shown that a diversity of infectious diseases is related to this polymorphism, either by susceptibility or even severity to them, and the receptor generated is also crucial for the generation of cell signaling pathways and immune response against pathogens.
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Affiliation(s)
| | - Davi Silva Santana
- Institute of Health Sciences (ICS), Federal University of Pará (UFPA), Belém, Brazil
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5
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Masin PS, Visentin HA, Elpidio LNS, Sell AM, Visentainer L, Lima Neto QAD, Zacarias JMV, Couceiro P, Higa Shinzato A, Santos Rosa M, Rodrigues-Santos P, Visentainer JEL. Genetic polymorphisms of toll-like receptors in leprosy patients from southern Brazil. Front Genet 2022; 13:952219. [PMID: 36313452 PMCID: PMC9596761 DOI: 10.3389/fgene.2022.952219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 09/14/2022] [Indexed: 11/17/2022] Open
Abstract
Leprosy is a chronic disease and also a global health issue, with a high number of new cases per year. Toll-like receptors can respond to mycobacterial molecules in the early stage of infection. As important components of the innate immune response, alterations in genes coding for these receptors may contribute to susceptibility/protection against diseases. In this context, we used a case-control study model (183 leprosy cases vs. 185 controls) to investigate whether leprosy patients and the control group, in southern Brazil, have different frequencies in TLR1 (TLR1 G>T; rs5743618), TLR2 (TLR2 T>C, rs1816702 and rs4696483), and TLR4 (TLR4 A>G, rs1927911) polymorphisms. Analysis of the TLR1 1805G>T polymorphism presented the G/G genotype more frequently in the control group. TLR2 T>C rs1816702 and TLR2 T>C rs4696483, the T/T and C/T genotype, respectively, were more frequent in the control group than in leprosy patients, suggesting protection from leprosy when the T allele is present (rs4696483). Haplotype analyses between TLR1 (rs5743618) and TLR2 (rs1816702 and rs4696483) polymorphisms suggest risk for the presence of the TCC haplotype and protection in the presence of the TCT haplotype. This study suggests that polymorphisms in TLR1 and TLR2 are factors that may contribute to development/resistance of leprosy.
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Affiliation(s)
- Priscila Saamara Masin
- Immunology Institute, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Immunogenetics Laboratory, Department of Basic Health Sciences, Post-Graduation Program in Biosciences and Phisiophatology, Maringá State University, Maringá, PR, Brazil
| | - Hugo Alves Visentin
- Immunogenetics Laboratory, Department of Basic Health Sciences, Post-Graduation Program in Biosciences and Phisiophatology, Maringá State University, Maringá, PR, Brazil
| | - Laíse Nayana Sala Elpidio
- Immunogenetics Laboratory, Department of Basic Health Sciences, Post-Graduation Program in Biosciences and Phisiophatology, Maringá State University, Maringá, PR, Brazil
| | - Ana Maria Sell
- Immunogenetics Laboratory, Department of Basic Health Sciences, Post-Graduation Program in Biosciences and Phisiophatology, Maringá State University, Maringá, PR, Brazil
| | - Lorena Visentainer
- Department of Medicine, Faculty of Medicine Science, Campinas State University, Campinas, SP, Brazil
| | - Quirino Alves De Lima Neto
- Immunogenetics Laboratory, Department of Basic Health Sciences, Post-Graduation Program in Biosciences and Phisiophatology, Maringá State University, Maringá, PR, Brazil
| | - Joana Maira Valentini Zacarias
- Immunogenetics Laboratory, Department of Basic Health Sciences, Post-Graduation Program in Biosciences and Phisiophatology, Maringá State University, Maringá, PR, Brazil
| | - Patrícia Couceiro
- Immunology and Oncology Laboratory, Center for Neurosciences and Cell Biology (CNC), University of Coimbra, Coimbra, Portugal
- Center of Investigation in Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Center for Innovation in Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
- Clinical Academic Centre of Coimbra (CACC), Coimbra, Portugal
| | - Andressa Higa Shinzato
- Immunogenetics Laboratory, Department of Basic Health Sciences, Post-Graduation Program in Biosciences and Phisiophatology, Maringá State University, Maringá, PR, Brazil
- *Correspondence: Jeane Eliete Laguila Visentainer, ; Jeane E. L. Visentainer, ; Andressa Higa Shinzato,
| | - Manuel Santos Rosa
- Immunology Institute, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Center of Investigation in Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Center for Innovation in Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
- Clinical Academic Centre of Coimbra (CACC), Coimbra, Portugal
| | - Paulo Rodrigues-Santos
- Immunology Institute, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Immunology and Oncology Laboratory, Center for Neurosciences and Cell Biology (CNC), University of Coimbra, Coimbra, Portugal
- Center of Investigation in Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Center for Innovation in Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
- Clinical Academic Centre of Coimbra (CACC), Coimbra, Portugal
| | - Jeane Eliete Laguila Visentainer
- Immunogenetics Laboratory, Department of Basic Health Sciences, Post-Graduation Program in Biosciences and Phisiophatology, Maringá State University, Maringá, PR, Brazil
- *Correspondence: Jeane Eliete Laguila Visentainer, ; Jeane E. L. Visentainer, ; Andressa Higa Shinzato,
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6
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Li M, Pan S, Chen H, Yan S, Liu Y. Effect of TLR-4 gene polymorphisms on sepsis susceptibility in neonates: a systematic review and meta-analysis. Biomark Med 2022; 16:1005-1017. [PMID: 36052709 DOI: 10.2217/bmm-2022-0390] [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: 11/21/2022] Open
Abstract
Aim: To clarify the role of polymorphisms rs4986790 and rs4986791 in TLR-4 with susceptibility to neonatal sepsis. Methods: To evaluate the possible correlation of polymorphisms rs4986790 and rs4986791 with sepsis risk, odds ratios (ORs) were calculated. The heterogeneity was evaluated by χ2-based Q-test. Results: For rs4986790, ORs were 1.36 (95% CI: 1.05-1.79, p = 0.017) and 1.84 (95% CI: 0.04-7.9, p = 0.410) under AG+GG versus AA and G vs. A models, respectively. For rs4986791, ORs were 2.22 (95% CI: 1.25-3.94, p = 0.006) and 2.20 (95% CI: 1.26-3.85, p = 0.005) under CT+TT versus CC and of T versus C models, respectively. Conclusion: The rs4986790 and rs4986791 polymorphisms in TLR-4 could influence the sepsis susceptibility in neonates.
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Affiliation(s)
- Ming Li
- Intensive Care Unit, Shanghai Construction Group Hospital, Shanghai, 200433, China
| | - Shiguang Pan
- Intensive Care Unit, Yantai Qi Shan Hospital, Yantai, Shandong, 264001, China
| | - Huilin Chen
- Intensive Care Unit, Shanghai Construction Group Hospital, Shanghai, 200433, China
| | - Shuying Yan
- Intensive Care Unit, Shanghai Construction Group Hospital, Shanghai, 200433, China
| | - Yuxin Liu
- Emergency Department, Chongqing University Affiliated Three Gorges Hospital (Bai'an Branch), Chongqing, 404000, China
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7
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Brinkworth JF, Shaw JG. On race, human variation, and who gets and dies of sepsis. AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY 2022. [PMCID: PMC9544695 DOI: 10.1002/ajpa.24527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jessica F. Brinkworth
- Department of Anthropology University of Illinois Urbana‐Champaign Urbana Illinois USA
- Carl R. Woese Institute for Genomic Biology University of Illinois at Urbana‐Champaign Urbana Illinois USA
- Department of Evolution, Ecology and Behavior University of Illinois Urbana‐Champaign Urbana Illinois USA
| | - J. Grace Shaw
- Department of Anthropology University of Illinois Urbana‐Champaign Urbana Illinois USA
- Carl R. Woese Institute for Genomic Biology University of Illinois at Urbana‐Champaign Urbana Illinois USA
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8
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Collier F, Chau C, Mansell T, Faye-Chauhan K, Vuillermin P, Ponsonby AL, Saffery R, Tang MLK, O'Hely M, Carlin J, Gray LEK, Bekkering S, Burgner D. Innate Immune Activation and Circulating Inflammatory Markers in Preschool Children. Front Immunol 2022; 12:830049. [PMID: 35211111 PMCID: PMC8860896 DOI: 10.3389/fimmu.2021.830049] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 12/28/2021] [Indexed: 12/17/2022] Open
Abstract
Early childhood is characterised by repeated infectious exposures that result in inflammatory responses by the innate immune system. In addition, this inflammatory response to infection is thought to contribute to the epidemiological evidence linking childhood infection and adult non-communicable diseases. Consequently, the relationship between innate immune responses and inflammation during early life may inform prevention of NCDs later in life. In adults, non-genetic host factors such as age, sex, and obesity, strongly impact cytokine production and circulating mediators, but data in children are lacking. Here, we assessed cytokine responses and inflammatory markers in a population of healthy preschool children (mean age 4.2 years). We studied associations between cytokines, plasma inflammatory markers and non-genetic host factors, such as sex, age, adiposity, season, and immune cell composition. Similar to adults, boys had a higher inflammatory response than girls, with IL-12p70 and IL-10 upregulated following TLR stimulation. Adiposity and winter season were associated with increased circulating inflammatory markers but not cytokine production. The inflammatory markers GlycA and hsCRP were positively associated with production of a number of cytokines and may therefore reflect innate immune function and inflammatory potential. This dataset will be informative for future prospective studies relating immune parameters to preclinical childhood NCD phenotypes.
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Affiliation(s)
- Fiona Collier
- School of Medicine, Deakin University, Geelong, VIC, Australia.,Child Health Research Unit, Barwon Health, Geelong, VIC, Australia
| | - Cerys Chau
- Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia
| | - Toby Mansell
- Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia
| | | | - Peter Vuillermin
- School of Medicine, Deakin University, Geelong, VIC, Australia.,Child Health Research Unit, Barwon Health, Geelong, VIC, Australia.,Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia
| | - Anne-Louise Ponsonby
- School of Medicine, Deakin University, Geelong, VIC, Australia.,Department of Neuroepidemiology, The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
| | - Richard Saffery
- Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia.,Department of Neuroepidemiology, The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
| | - Mimi L K Tang
- Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia.,Department of Paediatrics, Melbourne University, Parkville, VIC, Australia
| | - Martin O'Hely
- School of Medicine, Deakin University, Geelong, VIC, Australia.,Child Health Research Unit, Barwon Health, Geelong, VIC, Australia.,Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia
| | - John Carlin
- Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia.,Department of Paediatrics, Melbourne University, Parkville, VIC, Australia
| | | | - Siroon Bekkering
- Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia.,Department of Internal Medicine and Radboud Institute for Molecular Life Science (RIMLS), Radboud University Medical Center, Nijmegen, Netherlands
| | - David Burgner
- Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia.,Department of Paediatrics, Melbourne University, Parkville, VIC, Australia.,Department of Paediatrics, Monash University, Clayton, VIC, Australia
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9
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Henriques D, Lopes AR, Chejanovsky N, Dalmon A, Higes M, Jabal-Uriel C, Le Conte Y, Reyes-Carreño M, Soroker V, Martín-Hernández R, Pinto MA. A SNP assay for assessing diversity in immune genes in the honey bee (Apis mellifera L.). Sci Rep 2021; 11:15317. [PMID: 34321557 PMCID: PMC8319136 DOI: 10.1038/s41598-021-94833-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 07/12/2021] [Indexed: 02/07/2023] Open
Abstract
With a growing number of parasites and pathogens experiencing large-scale range expansions, monitoring diversity in immune genes of host populations has never been so important because it can inform on the adaptive potential to resist the invaders. Population surveys of immune genes are becoming common in many organisms, yet they are missing in the honey bee (Apis mellifera L.), a key managed pollinator species that has been severely affected by biological invasions. To fill the gap, here we identified single nucleotide polymorphisms (SNPs) in a wide range of honey bee immune genes and developed a medium-density assay targeting a subset of these genes. Using a discovery panel of 123 whole-genomes, representing seven A. mellifera subspecies and three evolutionary lineages, 180 immune genes were scanned for SNPs in exons, introns (< 4 bp from exons), 3' and 5´UTR, and < 1 kb upstream of the transcription start site. After application of multiple filtering criteria and validation, the final medium-density assay combines 91 quality-proved functional SNPs marking 89 innate immune genes and these can be readily typed using the high-sample-throughput iPLEX MassARRAY system. This medium-density-SNP assay was applied to 156 samples from four countries and the admixture analysis clustered the samples according to their lineage and subspecies, suggesting that honey bee ancestry can be delineated from functional variation. In addition to allowing analysis of immunogenetic variation, this newly-developed SNP assay can be used for inferring genetic structure and admixture in the honey bee.
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Affiliation(s)
- Dora Henriques
- Centro de Investigação de Montanha, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal
| | - Ana R Lopes
- Centro de Investigação de Montanha, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal
| | - Nor Chejanovsky
- Agricultural Research Organization, The Volcani Center, Rishon LeTsiyon, Israel
| | - Anne Dalmon
- INRAE, Unité Abeilles et Environnement, Avignon, France
| | - Mariano Higes
- IRIAF, Instituto Regional de Investigación y Desarrollo Agroalimentario y Forestal, Laboratorio de Patología Apícola, Centro de Investigación Apícola y Agroambiental (CIAPA), Consejería de Agricultura de la Junta de Comunidades de Castilla-La Mancha, Marchamalo, Spain
| | - Clara Jabal-Uriel
- IRIAF, Instituto Regional de Investigación y Desarrollo Agroalimentario y Forestal, Laboratorio de Patología Apícola, Centro de Investigación Apícola y Agroambiental (CIAPA), Consejería de Agricultura de la Junta de Comunidades de Castilla-La Mancha, Marchamalo, Spain
| | - Yves Le Conte
- INRAE, Unité Abeilles et Environnement, Avignon, France
| | | | - Victoria Soroker
- Agricultural Research Organization, The Volcani Center, Rishon LeTsiyon, Israel
| | - Raquel Martín-Hernández
- IRIAF, Instituto Regional de Investigación y Desarrollo Agroalimentario y Forestal, Laboratorio de Patología Apícola, Centro de Investigación Apícola y Agroambiental (CIAPA), Consejería de Agricultura de la Junta de Comunidades de Castilla-La Mancha, Marchamalo, Spain
- Instituto de Recursos Humanos para la Ciencia y la Tecnología (INCRECYT-FEDER), Fundación Parque Científico y Tecnológico de Castilla-La Mancha, 02006, Albacete, Spain
| | - M Alice Pinto
- Centro de Investigação de Montanha, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal.
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10
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Ma PY, Tan JE, Hee EW, Yong DWX, Heng YS, Low WX, Wu XH, Cletus C, Kumar Chellappan D, Aung K, Yong CY, Liew YK. Human Genetic Variation Influences Enteric Fever Progression. Cells 2021; 10:cells10020345. [PMID: 33562108 PMCID: PMC7915608 DOI: 10.3390/cells10020345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/02/2021] [Accepted: 02/04/2021] [Indexed: 01/06/2023] Open
Abstract
In the 21st century, enteric fever is still causing a significant number of mortalities, especially in high-risk regions of the world. Genetic studies involving the genome and transcriptome have revealed a broad set of candidate genetic polymorphisms associated with susceptibility to and the severity of enteric fever. This review attempted to explain and discuss the past and the most recent findings on human genetic variants affecting the progression of Salmonella typhoidal species infection, particularly toll-like receptor (TLR) 4, TLR5, interleukin (IL-) 4, natural resistance-associated macrophage protein 1 (NRAMP1), VAC14, PARK2/PACRG, cystic fibrosis transmembrane conductance regulator (CFTR), major-histocompatibility-complex (MHC) class II and class III. These polymorphisms on disease susceptibility or progression in patients could be related to multiple mechanisms in eliminating both intracellular and extracellular Salmonella typhoidal species. Here, we also highlighted the limitations in the studies reported, which led to inconclusive results in association studies. Nevertheless, the knowledge obtained through this review may shed some light on the development of risk prediction tools, novel therapies as well as strategies towards developing a personalised typhoid vaccine.
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Affiliation(s)
- Pei Yee Ma
- School of Postgraduate Studies, International Medical University, Bukit Jalil, Kuala Lumpur 57000, Malaysia;
| | - Jing En Tan
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia; (J.E.T.); (E.W.H.); (D.W.X.Y.); (Y.S.H.); (W.X.L.); (X.H.W.); (C.C.)
| | - Edd Wyn Hee
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia; (J.E.T.); (E.W.H.); (D.W.X.Y.); (Y.S.H.); (W.X.L.); (X.H.W.); (C.C.)
| | - Dylan Wang Xi Yong
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia; (J.E.T.); (E.W.H.); (D.W.X.Y.); (Y.S.H.); (W.X.L.); (X.H.W.); (C.C.)
| | - Yi Shuan Heng
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia; (J.E.T.); (E.W.H.); (D.W.X.Y.); (Y.S.H.); (W.X.L.); (X.H.W.); (C.C.)
| | - Wei Xiang Low
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia; (J.E.T.); (E.W.H.); (D.W.X.Y.); (Y.S.H.); (W.X.L.); (X.H.W.); (C.C.)
| | - Xun Hui Wu
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia; (J.E.T.); (E.W.H.); (D.W.X.Y.); (Y.S.H.); (W.X.L.); (X.H.W.); (C.C.)
| | - Christy Cletus
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia; (J.E.T.); (E.W.H.); (D.W.X.Y.); (Y.S.H.); (W.X.L.); (X.H.W.); (C.C.)
| | - Dinesh Kumar Chellappan
- Department of Life Sciences, International Medical University, Kuala Lumpur 57000, Malaysia;
| | - Kyan Aung
- Department of Pathology, International Medical University, Kuala Lumpur 57000, Malaysia;
| | - Chean Yeah Yong
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor 43400, Malaysia;
| | - Yun Khoon Liew
- Department of Life Sciences, International Medical University, Kuala Lumpur 57000, Malaysia;
- Correspondence:
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TLR4 896A/G and TLR9 1174G/A polymorphisms are associated with the risk of infectious mononucleosis. Sci Rep 2020; 10:13154. [PMID: 32753695 PMCID: PMC7403730 DOI: 10.1038/s41598-020-70129-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 07/21/2020] [Indexed: 02/06/2023] Open
Abstract
Toll-like receptors (TLRs) recognize pathogen-associated molecular patterns and activate innate and adaptive immune responses. Single nucleotide polymorphisms (SNPs) within the TLR genes may influence host–pathogen interactions and can have an impact on the progression of infectious diseases. The present study aimed to investigate the genotype distribution of TLR2 (2029C/T, rs121917864; 2258G/A, rs5743708), TLR4 (896A/G, rs4986790), and TLR9 (− 1237T/C, rs5743836; − 1486T/C, rs187084; 1174G/A, rs352139; and 2848C/T, rs352140) polymorphisms in 149 children and adolescents with infectious mononucleosis (IM) and 140 healthy individuals. The potential association of TLR SNPs with the clinical manifestations of EBV infection was also studied. The presence of TLR2, TLR4, and TLR9 SNPs was identified by polymerase chain reaction–restriction fragment length polymorphism (PCR–RFLP). EBV DNA loads were detected by quantitative real-time PCR assay. The TLR4 896 GG and the TLR9 1174 GA genotypes were associated with an increased risk of EBV-related IM in examined patients (p = 0.014 and p = 0.001, respectively). The heterozygous genotype of the TLR4 896A/G SNP was associated with an increased risk of elevated liver enzyme levels and leukocytosis (p < 0.05). Our preliminary study revealed that the TLR4 896A/G and the TLR9 1174G/A polymorphisms seem to be related to the course of acute EBV infection in children and adolescents.
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12
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Strutynskaya AD, Karnaushkina MA, Tyurin IE, Komarova IS. Salmonella sepsis in a patient with TLR4 gene polymorphisms. Radiol Case Rep 2020; 15:1545-1551. [PMID: 32670458 PMCID: PMC7341060 DOI: 10.1016/j.radcr.2020.05.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 05/20/2020] [Accepted: 05/21/2020] [Indexed: 11/27/2022] Open
Abstract
Non-typhoid Salmonella gastroenteritis is one of the most common forms of intestinal infections among the population of developed countries and generalized forms of infection are rare. We present a case of 67-year-old woman with salmonaella sepsis, deep venous thrombosis, and septic thromboembolism of pulmonary artery complicated with development of necrotizing pneumonia. Generalization of the infectious process was mediated by the presence of polymorphisms in the TLR4 gene. Development of pulmonary infarction is infrequent. Even rarer is a formation of cavities in infarcted lung tissue, usually in the background of the infectious disease. A combination of 2 rare conditions in 1 patient demonstrates the need of multidisciplinary approach in treatment of severe and atypical forms of infectious diseases to evaluate the primary etiology of such state. The article will discuss various aspects of lung tissue damage caused by Salmonella and give a brief overview of the literature on this topic.
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Affiliation(s)
- Anastasia D. Strutynskaya
- National Medical Research Center for Children's Health, Build.1, 2, Lomonosov Ave, Moscow, 119296, Russian Federation
- Corresponding author.
| | - Maria A. Karnaushkina
- I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation
| | - Igor E. Tyurin
- Russian Medical Academy of Postgraduate Education, Moscow, Russian Federation
| | - Irina S. Komarova
- I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation
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13
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Single Nucleotide Polymorphisms in TLR4 Affect Susceptibility to Tuberculosis in Mexican Population from the State of Veracruz. J Immunol Res 2020; 2020:2965697. [PMID: 32411792 PMCID: PMC7204096 DOI: 10.1155/2020/2965697] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 12/12/2019] [Accepted: 12/24/2019] [Indexed: 02/06/2023] Open
Abstract
Tuberculosis is still a global public health problem, with an estimated 10 million new cases and 1.6 million deaths in 2017. Of all humans infected with M. tuberculosis, only 10-15% will develop active tuberculosis disease during their lifetime, and data suggest that along with environmental factors, genetic factors influence susceptibility to develop active disease. Toll-like receptors (TLRs) are pattern recognition receptors that play a central role in the initiation and shaping of adaptive immune responses, and several TLRs have been shown to recognize mycobacterial components. In this work, we performed a case-control study to determine if common single nucleotide polymorphisms (SNPs) in genes encoding TLRs 1, 2, 4, 6, and 10 are associated with susceptibility to develop active tuberculosis in population from the state of Veracruz, Mexico. The study included 279 cases and 569 controls. The results show that the frequency of two SNPs in TLR4 was significantly higher in controls than in tuberculosis patients. The minor allele (G) of rs4986790 in TLR4 (D299G) decreased the risk of active tuberculosis in the allelic (A vs. G, OR = 0.31, 95%CI = 0.09‐0.81, p = 0.01) and in the dominant genetic model (AA vs. GG+AG, OR = 0.26, 95%CI = 0.09‐0.77, p = 0.02). Similarly, the minor allele (T) of rs4986791 in TLR4 (T399I) decreased the risk of active disease in the allelic model (C vs. T, OR = 0.29, 95%CI = 0.10‐0.90, p = 0.03). We did not find an association of SNPs in TLR1 (N248S), TLR2 (R753Q), TLR6 (S249P), and TLR10 (A153S and V298I) with tuberculosis disease. These results suggest that in this population, genetic variants of TLR4 affect the susceptibility for suffering active tuberculosis disease.
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14
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Ordeix L, Montserrat-Sangrà S, Martínez-Orellana P, Baxarias M, Solano-Gallego L. Toll-like receptors 2, 4 and 7, interferon-gamma and interleukin 10, and programmed death ligand 1 transcripts in skin from dogs of different clinical stages of leishmaniosis. Parasit Vectors 2019; 12:575. [PMID: 31806038 PMCID: PMC6894470 DOI: 10.1186/s13071-019-3827-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Accepted: 11/25/2019] [Indexed: 12/21/2022] Open
Abstract
Background Canine leishmaniosis (CanL) caused by Leishmania infantum can have several dermatological manifestations. The type of immune response elicited against the parasite appears to be at the basis for such clinical variability. Much of the work in CanL has focused on adaptive immune response and there are scarce data on the importance of the innate immune responses. Moreover, few studies have evaluated the immunological response in the cutaneous lesions in dogs naturally infected with L. infantum and with different degrees of disease severity, and no study has compared clinically-lesioned with normal-looking skin. Methods We determined and compared the transcription of toll like receptors (TLRs) 2, 4 and 7, interferon gamma (IFN-γ), interleukin (IL) 10 and programmed cell death protein ligand (PD-L) 1 by real-time PCR in paired clinically-lesioned and normal-looking skin from 25 diseased dogs (mild disease-stage I (n = 11) and moderate to severe disease-stages II and III (n = 14) as well as in normal-looking skin from healthy dogs (n = 10) from a non-endemic area. We also assessed the association between the transcripts in clinically-lesioned and normal-looking skin of dogs with leishmaniosis with clinicopathological, immunological and parasitological findings. Results Clinically-lesioned skin from mildly affected dogs was characterized by a significant upregulation of TLR2 (P < 0.0001) and IL-10 (P = 0.021) and downregulation of TLR7 (P = 0.004) when compared with more severely affected dogs. Normal-looking skin of mildly affected dogs was characterized by a significant lower expression of TLR7 (P = 0.003), IFN-γ (P < 0.0001) and PD-L1 (P = 0.001) when compared with more severely affected dogs. TLR2, TLR4, IL-10 and IFN-γ upregulation in clinically-lesioned skin was correlated with lower disease severity while TLR7 upregulation was correlated with markers of disease severity. Upregulation of TLR7, IL-10, IFN-γ and PD-L1 in normal-looking skin was correlated with disease severity. Conclusions This study demonstrated different expression profiles of immune genes in clinically-lesioned and normal-looking skin among mildly and more severely affected dogs. These immunological conditions might favor the maintenance and replication of the parasite in the skin of more severely affected dogs.
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Affiliation(s)
- Laura Ordeix
- Department de Medicina i Cirurgia Animals, Facultat de Veterinària, Universitat Autònoma de Barcelona, Bellaterra, Spain.,Hospital Clínic Veterinari, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Sara Montserrat-Sangrà
- Department de Medicina i Cirurgia Animals, Facultat de Veterinària, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Pamela Martínez-Orellana
- Department de Medicina i Cirurgia Animals, Facultat de Veterinària, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Marta Baxarias
- Department de Medicina i Cirurgia Animals, Facultat de Veterinària, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Laia Solano-Gallego
- Department de Medicina i Cirurgia Animals, Facultat de Veterinària, Universitat Autònoma de Barcelona, Bellaterra, Spain.
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15
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Huang WL, Xu Y, Wan SP. Association of Toll-like 4 receptor gene polymorphism (rs4986790, rs4986791) with the risk of urinary tract infection: A systematic review and meta-analysis. Kaohsiung J Med Sci 2019; 36:206-211. [PMID: 31749314 DOI: 10.1002/kjm2.12158] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 10/28/2019] [Indexed: 11/06/2022] Open
Abstract
Recently published studies had shown that there may be a potential link between the Single nucleotide polymorphism (SNP) of Toll-like receptor-4 (TLR4), and the risk of urinary tract infection (UTI); however, no consensus was reached. To further understand the relationship between TLR SNPs and urinary tract infections, we searched for related studies published in PubMed, EMBASE, and Web of Science before October 30, 2018, for further systematic review and meta-analysis. Our study accrued 10 case-control studies, which included 1476 urinary tract infection patients and 1449 healthy controls in TLR4(rs4986790, rs4986791). R3.4.2 and Stata 15.0 software were used for the analysis. In general, there was no statistically significant association between rs4986790 and urinary tract infection in the four genetic models. However, in the subgroup analysis, the Asian population showed significantly difference in the allelic model (G vs A: OR = 1.88 [95% CI:1.42-2.49], P = .03). In addition, there were also significant differences in the dominant model (GG + AG vs AA OR = 1.97 [95% CI:1.46-2.66], P = .01). Due to the small number of available literatures, no meaningful conclusion can be drawn regarding the relationship between TLR4 (rs4986791) and the risk of urinary tract infections in general. Nevertheless, our meta-analysis shows that in Asian populations, TLR4 (rs4986790) may be associated with risk of urinary tract infection.
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Affiliation(s)
- Wen-Lin Huang
- Department of Urology, ZhuZhou Central Hospital, ZhuZhou, Hunan, China
| | - Yong Xu
- Department of Urology, ZhuZhou Central Hospital, ZhuZhou, Hunan, China
| | - Shaw-Pong Wan
- Department of Urology, The First People's Hospital of Xiaoshan, Hangzhou, Zhejiang, China
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16
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Braliou GG, Kontou PI, Boleti H, Bagos PG. Susceptibility to leishmaniasis is affected by host SLC11A1 gene polymorphisms: a systematic review and meta-analysis. Parasitol Res 2019; 118:2329-2342. [PMID: 31230160 DOI: 10.1007/s00436-019-06374-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 06/07/2019] [Indexed: 12/31/2022]
Abstract
Leishmaniases are cutaneous, mucocutaneous, and visceral diseases affecting humans and domesticated animals mostly in the tropical and subtropical areas of the planet. Host genetics have been widely investigated for their role in developing various infectious diseases. The SLC11A1 gene has been reported to play a role in neutrophil function and is associated with susceptibility to infectious and inflammatory diseases such as tuberculosis or rheumatoid arthritis. In the present meta-analysis, we investigate the genetic association of SLC11A1 polymorphisms with susceptibility to leishmaniasis. Genotypes and other risk-related data were collected from 13 case-control and family-based studies (after literature search). Conventional random-effects meta-analysis was performed using STATA 13. To pool case-control and family-based data, the weighted Stouffer's method was also applied. Eight polymorphisms were investigated: rs2276631, rs3731865, rs3731864, rs17221959, rs201565523, rs2279015, rs17235409, and rs17235416. We found that rs17235409 (D543N) and rs17235416 (1729 + 55del4) are significantly associated with a risk for cutaneous leishmaniasis (CL), whereas rs17221959, rs2279015, and rs17235409 are associated with visceral leishmaniasis (VL). Our results suggest that polymorphisms in SLC11A1 affect susceptibility to CL and VL. These findings open new pathways in understanding macrophage response to Leishmania infection and the genetic factors predisposing to symptomatic CL or VL that can lead to the usage of predictive biomarkers in populations at risk.
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Affiliation(s)
- Georgia G Braliou
- Department of Computer Science and Biomedical Informatics, University of Thessaly, 2-4, Papasiopoulou str., 35131, Lamia, Greece.
| | - Panagiota I Kontou
- Department of Computer Science and Biomedical Informatics, University of Thessaly, 2-4, Papasiopoulou str., 35131, Lamia, Greece
| | - Haralabia Boleti
- Intracellular Parasitism Group, Department of Microbiology, Hellenic Pasteur Institute, 127 Vas. Sofias Ave., 11521, Athens, Greece
| | - Pantelis G Bagos
- Department of Computer Science and Biomedical Informatics, University of Thessaly, 2-4, Papasiopoulou str., 35131, Lamia, Greece.
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17
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Whitney J, Haase B, Beatty J, Barrs VR. Breed-specific variations in the coding region of toll-like receptor 4 in the domestic cat. Vet Immunol Immunopathol 2019; 209:61-69. [PMID: 30885307 PMCID: PMC7126157 DOI: 10.1016/j.vetimm.2019.02.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 02/01/2019] [Accepted: 02/25/2019] [Indexed: 12/15/2022]
Abstract
Specific point mutations in the human toll-like receptor 4 (TLR4) confer altered risk for diverse diseases including sepsis, aspergillosis and inflammatory bowel disease. Some of these TLR4 polymorphisms are racially specific. We hypothesised that feline TLR4 polymorphisms might underlie an observed increased risk to infectious and inflammatory diseases in some cat breeds. The aim of this study was to identify breed-specific variations in the coding region of feline TLR4 and to model the effect of mutations on protein structure and function in silico. The entire coding region of TLR4 was sequenced in 8 groups (7 pure-bred, 1 crossbred) of domestic cats (Felis catus) comprising 158 individuals. Twenty-two single nucleotide polymorphisms (SNPs) were identified in TLR4, with 16 located in the coding region (11 non-synonymous) and four in the 3′UTR. Comparison of breed specific allelic frequencies indicated that Burmese and British shorthairs most commonly differed from other breeds. In silico analyses to predict the impact of the 11 non-synonymous variants indicated a deleterious effect on protein structure for one SNP (c.869 G > A), which was not associated with a specific breed. Overall, findings from this study do not support a role of TLR4 dysfunction in breed-predispositions to infectious diseases in domestic cats in Australia.
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Affiliation(s)
- J Whitney
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW 2006, Australia.
| | - B Haase
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW 2006, Australia.
| | - J Beatty
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW 2006, Australia; Marie Bashir Institute of Infectious Diseases and Biosecurity, University of Sydney, NSW 2006, Australia.
| | - V R Barrs
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW 2006, Australia; Marie Bashir Institute of Infectious Diseases and Biosecurity, University of Sydney, NSW 2006, Australia.
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18
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Lack of association between the toll-like receptor 4 gene c.896A > G polymorphism and the predisposition to periodontal disease: An updated systematic review and meta-analysis. Meta Gene 2018. [DOI: 10.1016/j.mgene.2018.07.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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19
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Mirkamandar E, Nemati M, Hayatbakhsh MM, Bassagh A, Khosravimashizi A, Jafarzadeh A. Association of a single nucleotide polymorphism in the TLR2 gene (rs3804099), but not in the TLR4 gene (rs4986790), with Helicobacter pylori infection and peptic ulcer. TURKISH JOURNAL OF GASTROENTEROLOGY 2018; 29:283-291. [PMID: 29755012 DOI: 10.5152/tjg.2018.17484] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND/AIMS Toll-like receptors (TLRs), particularly TLR2 and TLR4, take part in elicitation of immune responses against Helicobacter pylori (H. pylori). This study aimed to investigate the relationship between single nucleotide polymorphisms (SNP) rs3804099 in the TLR2 gene and rs4986790 in the TLR4 gene with H. pylori infection and peptic ulcer (PU). MATERIALS AND METHODS Blood specimens were obtained from 350 individuals, including 100 H. pylori-infected patients with PU, 125 H. pylori-infected asymptomatic subjects (AS), and 125 non-infected healthy subjects (NHS). The DNA was extracted, and the SNPs were determined using ARMS-PCR method. RESULTS The frequency of CT genotype at TLR2 SNP rs3804099 in both the PU and AS groups was significantly higher than in the NHS group (p<0.05). In total H. pylori-infected individuals (PU+AS), the frequency of the CT genotype at rs3804099 was also significantly higher than in the NHS group (p<0.005). The frequency of the CC genotype at rs3804099 in PU+AS was markedly lower than in the NHS group (p=0.066). PU patients carried CT genotype more frequently than total healthy individuals (AS+NHS) (p<0.03). The distribution of the TT genotype was lower, whereas the frequency of the CT genotype was higher in AS individuals infected with CagA+ strains than those infected with CagA- strains (p<0.03). No significant differences were found among the PU, AS, and NHS groups regarding the genetic differences at rs4986790 in the TLR4 gene. CONCLUSION These results provide evidence regarding the association of the rs3804099 in the TLR2 gene with H. pylori infection and PU. The rs3804099 may affect vulnerability to H. pylori infection, particularly to CagA+ strains of bacteria.
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Affiliation(s)
- Ehsan Mirkamandar
- Medical Biotechnology Research Center, Ashkezar Branch, Islamic Azad University, Ashkezar, Yazd, Iran
| | - Maryam Nemati
- Department of Immunology, Kerman University of Medical Sciences School of Medicine, Kerman, Iran; Department of Laboratory Sciences, Kerman University of Medical Sciences School of Para-Medicine, Kerman, Iran
| | - Mohammad Mehdi Hayatbakhsh
- Gastroenterology and Hepatology Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran
| | - Arezu Bassagh
- Department of Immunology, Kerman University of Medical Sciences School of Medicine, Kerman, Iran
| | - Arezu Khosravimashizi
- Department of Immunology, Kerman University of Medical Sciences School of Medicine, Kerman, Iran
| | - Abdollah Jafarzadeh
- Department of Immunology, Kerman University of Medical Sciences School of Medicine, Kerman, Iran; Immunology of Infectious Diseases Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
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20
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Siebert JN, Hamann L, Verolet CM, Gameiro C, Grillet S, Siegrist CA, Posfay-Barbe KM. Toll-Interleukin 1 Receptor Domain-Containing Adaptor Protein 180L Single-Nucleotide Polymorphism Is Associated With Susceptibility to Recurrent Pneumococcal Lower Respiratory Tract Infections in Children. Front Immunol 2018; 9:1780. [PMID: 30131804 PMCID: PMC6090034 DOI: 10.3389/fimmu.2018.01780] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 07/19/2018] [Indexed: 12/28/2022] Open
Abstract
Lower respiratory tract infections (LRTI) are often caused by Streptococcus pneumoniae (Spn) and can be recurrent in 8% of children older than 2 years of age. Spn is recognized by pattern-recognition receptors (PRRs) of the innate immune system, in particular toll-like receptors (TLRs) 2 and 4. To assess whether a defect somewhere along this TLR signaling pathway increases susceptibility to recurrent pneumococcal LRTI, we conducted a prospective case-control study with 88 healthy individuals and 45 children with recurrent LRTI aged 2-5 years old. We examined cell surface expression of TLR2 and TLR4, as well as eight genetic variants of these receptors or associated co-receptors TLR1 and TLR6. Interleukin-6 production was measured after whole blood stimulation assays with specific agonists and heat-killed Spn. Our findings reveal that single-nucleotide polymorphisms within toll-interleukin 1 receptor domain-containing adaptor protein (TIRAP) alone or in combination with TLR1 N248S, TLR1 I602S, or TLR6 S249P polymorphisms contributes to various degree of susceptibility to recurrent pneumococcal LRTI in children by modulating the inflammatory response. In that respect, carriage of the TIRAP S180L heterozygous trait increases the likelihood to protect against pneumococcal LRTI, whereas children carrying the mutant homozygous TIRAP 180L polymorphism might be more likely susceptible to recurrent pneumococcal LRTI.
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Affiliation(s)
- Johan N Siebert
- Department of Pediatric Emergency Medicine, Geneva Children's Hospital, Geneva University Hospitals, Geneva, Switzerland.,Department of Pathology-Immunology and Pediatrics, Center for Vaccinology and Neonatal Immunology, Geneva Medical Center, Geneva, Switzerland
| | - Lutz Hamann
- Institute of Medical Microbiology and Hygiene, Charité-University Medical Center Berlin, Berlin, Germany
| | - Charlotte M Verolet
- Department of Pediatrics, Geneva Children's Hospital, Geneva University Hospitals, Geneva, Switzerland
| | - Cécile Gameiro
- Flow Cytometry Core Facility, Geneva University Medical Center, Geneva, Switzerland
| | - Stéphane Grillet
- Department of Pathology-Immunology and Pediatrics, Center for Vaccinology and Neonatal Immunology, Geneva Medical Center, Geneva, Switzerland
| | - Claire-Anne Siegrist
- Department of Pathology-Immunology and Pediatrics, Center for Vaccinology and Neonatal Immunology, Geneva Medical Center, Geneva, Switzerland.,Department of Pediatrics, Geneva Children's Hospital, Geneva University Hospitals, Geneva, Switzerland.,Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Klara M Posfay-Barbe
- Department of Pediatrics, Geneva Children's Hospital, Geneva University Hospitals, Geneva, Switzerland.,Faculty of Medicine, University of Geneva, Geneva, Switzerland
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Toll-like receptor 2, 4 and 9 polymorphisms and their association with ICU-acquired infections in Central Greece. J Crit Care 2018; 47:1-8. [PMID: 29860039 DOI: 10.1016/j.jcrc.2018.05.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 04/22/2018] [Accepted: 05/23/2018] [Indexed: 12/13/2022]
Abstract
PURPOSE To test the potential of four common Toll-like receptor (TLR) polymorphisms to predispose to specific intensive care unit (ICU)-acquired infections and affect outcomes in a Greek ICU. MATERIALS AND METHODS The incidence of TLR2-Arg753Gln, TLR4-Asp299Gly, TLR4-Thr399Ile and TLR9-T1237C polymorphisms, and their association with ICU-acquired infections and patients' clinical outcomes were prospectively evaluated The examined genetic polymorphisms were assessed by real-time Polymerase-Chain-Reaction (PCR). RESULTS During a 15-month period, 224 patients were enrolled and genotyped. The prevalence of genetic polymorphisms for TLR4-Asp299Gly, TLR4-Thr399Ile, mixed TLR4-Asp299Gly/Thr399Ile, TLR9-T1237C and TLR2-Arg753Gln was 14.4%, 14.7%, 11.2%, 24.5% and 2.2%, respectively. TLR4 polymorphisms were associated with increased susceptibility towards specific ICU-acquired infections, i.e. Gram-negative central-nervous-system infections (CNSI), ventilator-associated pneumonia (VAP) and urinary-tract infections (UTI), principally due to multi-drug resistant (MDR) Acinetobacter baumannii, Pseudomonas aeruginosa and Klebsiella pneumonia, respectively (all P < 0.05). TLR9-T1237C polymorphism was associated with lower incidence and fewer relapses of CNSIs and UTIs when compared to mixed TLR4-Asp299Gly/Thr399Ile polymorphism group (P ≤ 0.039). ICU-stay was significantly prolonged in TLR4 polymorphisms (P ≤ 0.0416). CONCLUSIONS Common TLR-signaling polymorphisms might be implicated in the clinical phenotype of ICU-acquired infections in Central Greece. The possible impact of TLR4 polymorphisms on enhanced susceptibility towards Gram-negative MDR-infections in defined critical-disease states warrants further investigation. Trial Registration Clinical Trials.gov identifier: NCT00932243.
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de Sousa JR, Sotto MN, Simões Quaresma JA. Leprosy As a Complex Infection: Breakdown of the Th1 and Th2 Immune Paradigm in the Immunopathogenesis of the Disease. Front Immunol 2017; 8:1635. [PMID: 29234318 PMCID: PMC5712391 DOI: 10.3389/fimmu.2017.01635] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 11/09/2017] [Indexed: 12/15/2022] Open
Abstract
Leprosy is a chronic infectious disease whose evolution involves complex immune mechanisms of the host that influence the clinical presentation of the disease. For many years, the main interpretation of the host defense response was based on characterization of the established immune paradigm between T helper (Th) 1 and Th2 lymphocytes. However, with advances in the knowledge of immunology, new approaches have emerged along with the development of new immunological pathways that have changed the interpretation of the long-established paradigm of the polar forms of the disease, especially with the identification of new subtypes of T lymphocytes such as Th9, Th17, Th22, and Tregs. Thus, this review discusses the role of these new subtypes of T helper lymphocytes and how the development of the immune response of these cells modifies the pattern of the Th1/Th2 response in the immunopathogenesis of leprosy.
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Affiliation(s)
| | - Mirian Nacagami Sotto
- Faculty of Medicine, Department of Pathology, Sao Paulo University, São Paulo, Brazil
| | - Juarez Antonio Simões Quaresma
- Tropical Medicine Center, Federal University of Pará, Belém, Brazil.,Center of Biological and Health Sciences, State University of Pará, Belém, Brazil
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Mallick P, Basu S, Moorthy B, Ghose R. Role of Toll-like receptor 4 in drug-drug interaction between paclitaxel and irinotecan in vitro. Toxicol In Vitro 2017; 41:75-82. [PMID: 28242239 PMCID: PMC5479719 DOI: 10.1016/j.tiv.2017.02.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 02/10/2017] [Accepted: 02/23/2017] [Indexed: 12/22/2022]
Abstract
The bacterial receptor, Toll-like receptor (TLR) 4 mediates inflammatory responses and has been linked to a broad array of diseases. TLR4 agonists are being explored as potential treatments for cancer and other diseases. We have previously shown that activation of TLR4 by lipopolysaccharide (LPS) leads to down-regulation of drug metabolizing enzymes/transporters (DMETs), and altered pharmacokinetics/pharmacodynamics (PK/PD) of drugs. These changes can increase the risk of drug-drug interactions (DDIs) in patients on multiple medications. Clinically, DDI was observed for combination chemotherapy of paclitaxel (TLR4 ligand) and irinotecan. To determine the role of TLR4 in DDI between paclitaxel and irinotecan in vitro, primary hepatocytes from TLR4-wild-type (WT) and mutant mice were pre-treated with paclitaxel, followed by irinotecan. Gene expression of DMETs was determined. Paclitaxel treatment increased the levels of irinotecan metabolites, SN-38 and SN-38 glucuronide (SN-38G) in TLR4-dependent manner. Paclitaxel-mediated induction of genes involved in irinotecan metabolism such as Cyp3a11 and Ugt1a1 was TLR4-dependent, while induction of the transporter Mrp2 was TLR4-independent. These novel findings demonstrate that paclitaxel can affect irinotecan metabolism by a TLR4-dependent mechanism. This provides a new perspective towards evaluation of marketed drugs according to their potential to exert DDIs in TLR4-dependent manner.
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Affiliation(s)
- Pankajini Mallick
- Department of Pharmacological and Pharmaceutical Sciences, University of Houston, Houston, TX, USA
| | - Sumit Basu
- Center for Pharmacometrics & Systems Pharmacology, Department of Pharmaceutics, University of Florida, Orlando, FL, USA
| | - Bhagavtula Moorthy
- Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Romi Ghose
- Department of Pharmacological and Pharmaceutical Sciences, University of Houston, Houston, TX, USA.
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Iwalokun BA, Iwalokun SO, Udoh BE, Balogun M. Assessment of co-segregated TLR4 genotypes among Nigerian children with asymptomatic and clinical malaria. Asian Pac J Trop Biomed 2017. [DOI: 10.1016/j.apjtb.2016.11.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Yong YK, Shankar EM, Westhorpe CL, Maisa A, Spelman T, Kamarulzaman A, Crowe SM, Lewin SR. Genetic polymorphisms in the CD14 gene are associated with monocyte activation and carotid intima-media thickness in HIV-infected patients on antiretroviral therapy. Medicine (Baltimore) 2016; 95:e4477. [PMID: 27495090 PMCID: PMC4979844 DOI: 10.1097/md.0000000000004477] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
HIV-infected individuals on antiretroviral therapy (ART) are at increased risk of cardiovascular disease (CVD). Given the relationship between innate immune activation and CVD, we investigated the association of single-nucleotide polymorphisms (SNPs) in TLR4 and CD14 and carotid intima-media thickness (cIMT), a surrogate measurement for CVD, in HIV-infected individuals on ART and HIV-uninfected controls as a cross-sectional, case-control study. We quantified the frequency of monocyte subsets (CD14, CD16), markers of monocyte activation (CD38, HLA-DR), and endothelial adhesion (CCR2, CX3CR1, CD11b) by flow cytometry. Plasma levels of lipopolysaccharide, sCD163, sCD14, sCX3CL1, and sCCL2, were measured by ELISA. Genotyping of TLR4 and CD14 SNPs was also performed. The TT genotype for CD14/-260SNP but not the CC/CT genotype was associated with elevated plasma sCD14, and increased frequency of CD11b+CD14+ monocytes in HIV-infected individuals. The TT genotype was associated with lower cIMT in HIV-infected patients (n = 47) but not in HIV-uninfected controls (n = 37). The AG genotype for TLR4/+896 was associated with increased CX3CR1 expression on total monocytes among HIV-infected individuals and increased sCCL2 and fibrinogen levels in HIV-uninfected controls. SNPs in CD14/-260 and TLR4/+896 were significantly associated with different markers of systemic and monocyte activation and cIMT that differed between HIV-infected participants on ART and HIV-uninfected controls. Further investigation on the relationship of these SNPs with a clinical endpoint of CVD is warranted in HIV-infected patients on ART.
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Affiliation(s)
- Yean K. Yong
- Centre of Excellence for Research in AIDS (CERiA)
| | - Esaki M. Shankar
- Centre of Excellence for Research in AIDS (CERiA)
- Tropical Infectious Diseases Research and Education Centre (TIDREC), Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
- Division of Infection Biology and Microbiology, Department of Life Sciences, School of Basic and Applied Sciences, Central University of Tamil Nadu (CUTN), Neelakudi Campus, Tiruvarur, India
| | | | | | - Tim Spelman
- Centre for Population Health, Burnet Institute
| | - Adeeba Kamarulzaman
- Centre of Excellence for Research in AIDS (CERiA)
- Infectious Disease Unit, University Malaya Medical Centre, Kuala Lumpur, Malaysia
| | - Suzanne M. Crowe
- Centre for Biomedical Research
- Department of Infectious Diseases, Alfred Hospital and Monash University, Melbourne, Australia
| | - Sharon R. Lewin
- Department of Infectious Diseases, Alfred Hospital and Monash University, Melbourne, Australia
- Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Australia
- Correspondence: Sharon R. Lewin, Peter Doherty Institute for Infection and Immunity, The University of Melbourne and Royal Melbourne Hospital, Melbourne, Australia (e-mail: )
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Sun J, Hu J, Tu C, Zhong A, Xu H. Obstructive Sleep Apnea Susceptibility Genes in Chinese Population: A Field Synopsis and Meta-Analysis of Genetic Association Studies. PLoS One 2015; 10:e0135942. [PMID: 26284518 PMCID: PMC4540430 DOI: 10.1371/journal.pone.0135942] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 07/28/2015] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Epidemiological studies to date have evaluated the association between genetic variants and the susceptibility to obstructive sleep apnea (OSA). However, the results of these studies have been inconclusive. In this current study we performed meta-analysis of genetic association studies (GAS) to pool OSA-susceptible genes in Chinese population, to perform a more precise evaluation of the association. METHODS Various databases (i.e., PubMed, EMBASE, HuGE Navigator, Wanfang and CNKI) were searched to identify all eligible GAS-related variants associated with susceptibility to OSA. The generalized odds ratio metric (ORG) and the odds ratio (OR) of the allele contrast were used to quantify the impact of genetic variants on the risk of OSA. Cumulative and recursive cumulative meta-analyses (CMA) were also performed to investigate the trend and stability of effect sizes as evidence was accumulated. RESULTS Thirty-two GAS evaluating 13 polymorphisms in 10 genes were included in our meta-analysis. Significant associations were derived for four polymorphisms either for the allele contrast or for the ORG. The variants TNF-α-308G/A, 5-HTTLPR, 5-HTTVNTR, and APOE showed marginal significance for ORG (95% confidence interval [CI]): 2.01(1.31-3.07); 1.31(1.09-1.58); 1.85(1.16-2.95); 1.79(1.10-2.92); and 1.79(1.10-2.92) respectively. In addition, the TNF-α-308G/A, 5-HTTLPR, and 5-HTTVNTR variants showed significance for the allele contrast: 2.15(1.39-3.31); 2.26(1.58-3.24); 1.32(1.12-1.55); and 1.86(1.12-3.08) respectively. CMA showed a trend towards an association, and recursive CMA indicated that more evidence was needed to determine whether this was significant. CONCLUSIONS TNF-α, 5-HTT, and APOE genes can all be proposed as OSA-susceptibility genes in Chinese population. Genome-wide association studies (GWAS) are therefore urgently needed to confirm our findings within a larger sample of OSA patients in China.
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Affiliation(s)
- Jinxian Sun
- Department of Respiratory Medicine, Jiading Central Hospital, 1 Chengbei road, Shanghai, 201800, China
| | - Jianrong Hu
- Department of Respiratory Medicine, Jiading Central Hospital, 1 Chengbei road, Shanghai, 201800, China
| | - Chunlin Tu
- Department of Respiratory Medicine, Jiading Central Hospital, 1 Chengbei road, Shanghai, 201800, China
- * E-mail: (CT); (AZ); (HX)
| | - Anyuan Zhong
- Department of Respiratory Diseases, the Second Affiliated Hospital of Soochow University, 1055 Sanxiang Road, Suzhou, 215004 China
- * E-mail: (CT); (AZ); (HX)
| | - Huajun Xu
- Department of Otolaryngology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Otolaryngology Institute of Shanghai Jiao Tong University, 600 Yishan Road, Shanghai, 200233, China
- * E-mail: (CT); (AZ); (HX)
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Predisposition to Childhood Otitis Media and Genetic Polymorphisms within the Toll-Like Receptor 4 (TLR4) Locus. PLoS One 2015; 10:e0132551. [PMID: 26177520 PMCID: PMC4503307 DOI: 10.1371/journal.pone.0132551] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 06/16/2015] [Indexed: 12/22/2022] Open
Abstract
Background Predisposition to childhood otitis media (OM) has a strong genetic component, with polymorphisms in innate immunity genes suspected to contribute to risk. Studies on several genes have been conducted, but most associations have failed to replicate in independent cohorts. Methods We investigated 53 gene polymorphisms in a Finnish cohort of 624 cases and 778 controls. A positive association signal was followed up in a tagging approach and tested in an independent Finnish cohort of 205 cases, in a British cohort of 1269 trios, as well as in two cohorts from the United States (US); one with 403 families and the other with 100 cases and 104 controls. Results In the initial Finnish cohort, the SNP rs5030717 in the TLR4 gene region showed significant association (OR 1.33, P = .003) to OM. Tagging SNP analysis of the gene found rs1329060 (OR 1.33, P = .002) and rs1329057 (OR 1.29, P = .003) also to be associated. In the more severe phenotype the association was stronger. This finding was supported by an independent Finnish case cohort, but the associations failed to replicate in the British and US cohorts. In studies on TLR4 signaling in 20 study subjects, the three-marker risk haplotype correlated with a decreased TNFα secretion in myeloid dendritic cells. Conclusions The TLR4 gene locus, regulating the innate immune response, influences the genetic predisposition to childhood OM in a subpopulation of patients. Environmental factors likely modulate the genetic components contributing to the risk of OM.
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Iwalokun BA, Oluwadun A, Iwalokun SO, Agomo P. Toll-like receptor (TLR4) Asp299Gly and Thr399Ile polymorphisms in relation to clinical falciparum malaria among Nigerian children: a multisite cross-sectional immunogenetic study in Lagos. Genes Environ 2015; 37:3. [PMID: 27350800 PMCID: PMC4910769 DOI: 10.1186/s41021-015-0002-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Accepted: 02/06/2015] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION This study determined the association of TLR4 Asp299Gly and Thr399Ile with uncomplicated and severe malaria among Nigerian children of similar ethnic background in Lagos. The association of these SNPs with high parasite density, malnutrition, hyperpyrexia and anaemia was also investigated. METHODS Genomic DNA of the study participants was screened for the genotypes of TLR4 Asp299Gly and Thr399Ile by PCR-RFLP. Anthropometric measurement was performed on the Pf infected children stratified into asymptomatic malaria (control), uncomplicated and severe malaria (case). Parasites were detected by light microscopy and Hardy Weinberg Equilibrium (HWE) of SNP genotypes was also determined. RESULTS A total of 279 children comprising 182 children (62.1 % male; mean ± SEM age, 57.3 ± 1.7 months) with clinical falciparum malaria and 97 children (55.7 % male; mean ± SEM age, 55.6 ± 2.5 years) with asymptomatic falciparum malaria were enrolled. All the genotypes of both TLR4 SNPs were found in the study population with their minor alleles: 299Gly and 399Ile, found to be 17.6 % and 14.7 % in severe malaria children. Unlike in asymptomatic population, the genotype distribution of TLR4 Asp299Gly SNP was not in HWE in the clinical malaria group but did not condition susceptibility. However, Asp299Gly and Thr399Ile polymorphisms were found to increase the risk of severe malaria 3-fold and 8-fold respectively (P < 0.05). They also increased the risk of severe anaemia, high parasite density and severe malnutrition 3.8 -5.3-fold, 3.3 - 4.4-fold and 4-fold respectively. CONCLUSIONS Based on the above findings, we conclude that TLR4 Asp299Gly and Thr399Ile polymorphisms may modulate susceptibility to severe malaria among Nigerian children of Yoruba ethnic background.
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Affiliation(s)
- Bamidele Abiodun Iwalokun
- />Biochemistry and Nutrition Division, Nigerian Institute of Medical Research, 6 Edmund Crescent, Yaba. PMB. 2013, Lagos, Nigeria
- />Department of Medical Microbiology & Parasitology, Olabisi Onabanjo University, Sagamu, Ogun State Nigeria
| | - Afolabi Oluwadun
- />Department of Medical Microbiology & Parasitology, Olabisi Onabanjo University, Sagamu, Ogun State Nigeria
| | | | - Philip Agomo
- />Biochemistry and Nutrition Division, Nigerian Institute of Medical Research, 6 Edmund Crescent, Yaba. PMB. 2013, Lagos, Nigeria
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Zhao J, Han X, Xue L, Zhu K, Liu H, Xie A. Association of TLR4 gene polymorphisms with sporadic Parkinson's disease in a Han Chinese population. Neurol Sci 2015; 36:1659-65. [PMID: 25908385 DOI: 10.1007/s10072-015-2227-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2014] [Accepted: 04/17/2015] [Indexed: 02/08/2023]
Abstract
Parkinson's disease (PD) is considered as a multifactorial disorder involving complex interactions between genetic and environmental factors, while previous studies point to a pivotal role of neuroinflammation in the pathophysiology of PD. As a member of pattern recognition receptors, TLR4 plays an important role in the immune response and inflammatory responses. Growing evidences suggest that mutation of TLR4 gene may be connected with the development of PD. The objective of this study was to evaluate whether genetic polymorphisms of the TLR4 gene are associated with PD susceptibility. We genotyped three single-nucleotide polymorphisms of the TLR4 gene (rs1927911, rs1927914 and rs10116253) by polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP) in unrelated 380 PD patients and 380 healthy-matched controls. Our study revealed that rs1927914 C allele carriers and C allele were probably related to a decreased risk of PD (p = 0.032 and p = 0.028, respectively) as well as male PD (p = 0.034) and early-onset PD (EOPD) (p = 0.023). In addition, there were significant differences in genotype and allele distribution in male PD patients and its healthy-matched control subgroup (p = 0.035 and p = 0.012, respectively). For rs1927911 and rs10116253 polymorphisms, genotype or allele frequencies did not differ between groups. Our data suggest that the TLR4 gene might contribute to the risk of developing PD in Han Chinese and rs1927914 polymorphism may be a protective factor for sporadic PD, male PD and EOPD.
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Affiliation(s)
- Jing Zhao
- Department of Neurology, Affiliated Hospital of Medical College, Qingdao University, No. 16 Jiangsu road, Qingdao, 266003, Shandong Province, People's Republic of China
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Cai X, Fu Y, Chen Q. Association between TLR4 A299G polymorphism and pneumonia risk: a meta-analysis. Med Sci Monit 2015; 21:625-9. [PMID: 25720378 PMCID: PMC4354425 DOI: 10.12659/msm.892557] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background Several genetic studies have evaluated the association between Toll-like receptor 4 (TLR4) A299G polymorphism and the risk of pneumonia. However, the results were not consistent. We thus did this meta-analysis. Material/Methods Relevant studies were systematically searched by using the NCBI, Medline, Web of Science, and Embase databases. Data were extracted independently by 2 investigators. Odds ratios (ORs) and corresponding 95% confidence intervals (CIs) were estimated. Results Eight case-control studies with 658 patients and 1862 controls were included in this meta-analysis. TLR4 A299G polymorphism was significantly associated with pneumonia risk (OR=1.74; 95% CI 1.19–2.53; P=0.004). The result was significant in adults. In addition, TLR4 A299G polymorphism was also associated with community-acquired pneumonia (CAP) risk. Results from cumulative meta-analysis and sensitivity analysis suggested that the results are reliable and robust. Conclusions The results of this meta-analysis suggest that susceptibility to pneumonia was associated with TLR4 A299G polymorphism.
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Affiliation(s)
- Xingjun Cai
- Department of Respiratory, Hainan Provincial People's Hospital, Haikou, Hainan, China (mainland)
| | - Yihui Fu
- Department of Respiratory, Hainan Provincial People's Hospital, Haikou, Hainan, China (mainland)
| | - Qingyun Chen
- Department of Respiratory, Hainan Provincial People's Hospital, Haikou, Hainan, China (mainland)
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Jones C, Darton TC, Pollard AJ. Why the development of effective typhoid control measures requires the use of human challenge studies. Front Microbiol 2014; 5:707. [PMID: 25566221 PMCID: PMC4267421 DOI: 10.3389/fmicb.2014.00707] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 11/27/2014] [Indexed: 01/21/2023] Open
Affiliation(s)
- Claire Jones
- Oxford Vaccine Group, Department of Paediatrics, National Institute for Health Research Oxford Biomedical Research Centre, University of Oxford Oxford, UK
| | - Thomas C Darton
- Oxford Vaccine Group, Department of Paediatrics, National Institute for Health Research Oxford Biomedical Research Centre, University of Oxford Oxford, UK
| | - Andrew J Pollard
- Oxford Vaccine Group, Department of Paediatrics, National Institute for Health Research Oxford Biomedical Research Centre, University of Oxford Oxford, UK
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Antibacterial surface treatment for orthopaedic implants. Int J Mol Sci 2014; 15:13849-80. [PMID: 25116685 PMCID: PMC4159828 DOI: 10.3390/ijms150813849] [Citation(s) in RCA: 179] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 06/06/2014] [Accepted: 06/13/2014] [Indexed: 02/07/2023] Open
Abstract
It is expected that the projected increased usage of implantable devices in medicine will result in a natural rise in the number of infections related to these cases. Some patients are unable to autonomously prevent formation of biofilm on implant surfaces. Suppression of the local peri-implant immune response is an important contributory factor. Substantial avascular scar tissue encountered during revision joint replacement surgery places these cases at an especially high risk of periprosthetic joint infection. A critical pathogenic event in the process of biofilm formation is bacterial adhesion. Prevention of biomaterial-associated infections should be concurrently focused on at least two targets: inhibition of biofilm formation and minimizing local immune response suppression. Current knowledge of antimicrobial surface treatments suitable for prevention of prosthetic joint infection is reviewed. Several surface treatment modalities have been proposed. Minimizing bacterial adhesion, biofilm formation inhibition, and bactericidal approaches are discussed. The ultimate anti-infective surface should be “smart” and responsive to even the lowest bacterial load. While research in this field is promising, there appears to be a great discrepancy between proposed and clinically implemented strategies, and there is urgent need for translational science focusing on this topic.
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