1
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Barreyro FJ, Maiorana F, Caronia MV, Elizondo K, Schneider A, Zapata PD. Association between genetic polymorphisms of NOD1, Interleukin-1B, and cagA strain with low-grade duodenal eosinophilia in Helicobacter pylori-related dyspepsia. Helicobacter 2023; 28:e13002. [PMID: 37350445 DOI: 10.1111/hel.13002] [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: 03/25/2023] [Revised: 06/09/2023] [Accepted: 06/13/2023] [Indexed: 06/24/2023]
Abstract
BACKGROUND Functional dyspepsia (FD) is a multifactorial disorder. Helicobacter pylori (H. pylori)-related dyspepsia (HpD) may be considered a separate entity. Duodenal eosinophilia is a potential pathogenic mechanism in FD. However, the impact of duodenal eosinophilia and host genetic polymorphism of innate and pro-inflammatory cascade, nucleotide-binding oligomerization domain 1 (NOD-1), and interleukin-1 beta (IL-1β) in HpD was not explored. AIM To evaluate the association of NOD1-796G>A and IL-1B-511C>T gene variants and low-grade duodenal eosinophilia in HpD. METHODS A multicenter cross-sectional study was conducted. A total of 253 patients who met Rome-IV criteria were selected before upper endoscopy and 98 patients were included after unremarkable upper endoscopy and positive H. pylori in gastric biopsies were assessed. Clinical parameters, H. pylori cagA and duodenal histology, were evaluated. RESULTS Sixty-four (65%) patients had epigastric pain syndrome (EPS), 24 (25%) postprandial distress syndrome (PDS), and 10 (10%) EPS/PDS overlap. FD subtypes were not associated with NOD1-796G>A and IL-1B-511C>T gene variants. Low-grade duodenal eosinophilia was significantly increased in NOD1-796 GG versus single A-allele, but not in IL-1B-511 single T-allele or CC-allele. This association is dependent of cagA infection, since harboring cagA strain was significantly associated with low-grade duodenal eosinophilia with isolated variants NOD1-796 GG and IL-1B-511 single T-allele, but not without cagA. When we performed combined polymorphism analysis with NOD1-796 GG/IL-1B-511 single T-allele, a synergistic effect on low-grade duodenal eosinophilia was found between these two loci irrespective of cagA strain status in HpD. CONCLUSION Our findings suggest that low-grade duodenal eosinophilia is significantly associated with NOD1-796 GG allele specially in cagA strain and with allelic combination NOD1-796 GG/IL-1B-511 single T-allele independent of cagA strain infection in HpD patients.
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Affiliation(s)
- Fernando Javier Barreyro
- Laboratorio de Biotecnología Molecular (BIOTECMOL)., Instituto de Biotecnología de Misiones "Dra. Maria Ebbe Reca" (InBioMis). Facultad de Ciencias Exactas Químicas y Naturales. Universidad Nacional de Misiones, Posadas, Argentina
- CONICET, Buenos Aires, Argentina
| | - Facundo Maiorana
- Laboratorio de Biotecnología Molecular (BIOTECMOL)., Instituto de Biotecnología de Misiones "Dra. Maria Ebbe Reca" (InBioMis). Facultad de Ciencias Exactas Químicas y Naturales. Universidad Nacional de Misiones, Posadas, Argentina
| | - Maria Virginia Caronia
- Laboratorio de Biotecnología Molecular (BIOTECMOL)., Instituto de Biotecnología de Misiones "Dra. Maria Ebbe Reca" (InBioMis). Facultad de Ciencias Exactas Químicas y Naturales. Universidad Nacional de Misiones, Posadas, Argentina
| | - Karina Elizondo
- Instituto Universitario en Ciencias de la Salud, Fundación HA Barceló, Santo Tomé, Argentina
| | - Adolfo Schneider
- Instituto Universitario en Ciencias de la Salud, Fundación HA Barceló, Santo Tomé, Argentina
| | - Pedro Darío Zapata
- Laboratorio de Biotecnología Molecular (BIOTECMOL)., Instituto de Biotecnología de Misiones "Dra. Maria Ebbe Reca" (InBioMis). Facultad de Ciencias Exactas Químicas y Naturales. Universidad Nacional de Misiones, Posadas, Argentina
- CONICET, Buenos Aires, Argentina
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2
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Liu J, Luo L, Xu Z, Yang X, Yu J, He K, Hong S. NOD1 mediated D. pteronyssinus-induced allergic airway inflammation through RIP2/NF-κB. Immunobiology 2023; 228:152394. [PMID: 37224660 DOI: 10.1016/j.imbio.2023.152394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 05/01/2023] [Accepted: 05/09/2023] [Indexed: 05/26/2023]
Abstract
BACKGROUND Dermatophagoides pteronyssinus (D. pteronyssinus) is the main cause of allergic airway inflammation. As the earliest intracytoplasmic pathogen recognition receptors (PRR), NOD1 has been identified as key inflammatory mediator in NOD-like receptor (NLR) family. OBJECTIVE Our primary aim is to elucidate whether NOD1 and its downstream regulatory proteins mediate D. pteronyssinus-induced allergic airway inflammation. METHODS Mouse and cell models of D. pteronyssinus-induced allergic airway inflammation were established. NOD1 was inhibited in bronchial epithelium cells (BEAS-2B cells) and mice by cell transfection or application of inhibitor. The change of downstream regulatory proteins was detected by quantitative real-time PCR (qRT-PCR) and Western blot. The relative expression of inflammatory cytokines was evaluated by ELISA. RESULTS The expression level of NOD1 and its downstream regulatory proteins increased in BEAS-2B cells and mice after treating with D. pteronyssinus extract, followed by the aggravation of inflammatory response. Moreover, inhibition of NOD1 decreased the inflammatory response, which also downregulated the expression of downstream regulatory proteins and inflammatory cytokines. CONCLUSIONS NOD1 involves in the development of D. pteronyssinus-induced allergic airway inflammation. Inhibition of NOD1 reduces D. pteronyssinus-induced airway inflammation.
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Affiliation(s)
- Jiaxi Liu
- Graduate School of Nanjing Medical University, Nanjing, 101Longmian Avenue, Jiangning District, Nanjing 211166, Jiangsu Province, China
| | - Liang Luo
- Department of Critical Care Medicine, Wuxi No.2 People's Hospital affiliated Wuxi Clinical College of Nantong University, No. 68 Zhongshan Road, Wuxi 214002, Jiangsu Province, China
| | - Zuyu Xu
- Graduate School of Nanjing Medical University, Nanjing, 101Longmian Avenue, Jiangning District, Nanjing 211166, Jiangsu Province, China
| | - Xiucheng Yang
- Graduate School of Nanjing Medical University, Nanjing, 101Longmian Avenue, Jiangning District, Nanjing 211166, Jiangsu Province, China
| | - Jinyan Yu
- Graduate School of Nanjing Medical University, Nanjing, 101Longmian Avenue, Jiangning District, Nanjing 211166, Jiangsu Province, China
| | - Kaiyue He
- Department of Clinical Laboratory, Wuxi No.2 People's Hospital affiliated Wuxi Clinical College of Nantong University, No. 68 Zhongshan Road, Wuxi 214002, Jiangsu Province, China
| | - Shanchao Hong
- Department of Clinical Laboratory, Wuxi No.2 People's Hospital affiliated Wuxi Clinical College of Nantong University, No. 68 Zhongshan Road, Wuxi 214002, Jiangsu Province, China.
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3
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Gobert AP, Wilson KT. Induction and Regulation of the Innate Immune Response in Helicobacter pylori Infection. Cell Mol Gastroenterol Hepatol 2022; 13:1347-1363. [PMID: 35124288 PMCID: PMC8933844 DOI: 10.1016/j.jcmgh.2022.01.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 01/25/2022] [Accepted: 01/25/2022] [Indexed: 12/30/2022]
Abstract
Gastric cancer (GC) is the fifth most common cancer and the fourth most common cause of cancer-related death worldwide. The intestinal type of GC progresses from acute to chronic gastritis, multifocal atrophic gastritis, intestinal metaplasia, dysplasia, and carcinoma. Infection of the stomach by Helicobacter pylori, a Gram-negative bacterium that infects approximately 50% of the world's population, is the causal determinant that initiates the gastric inflammation and then disease progression. In this context, the induction of the innate immune response of gastric epithelial cells and myeloid cells by H. pylori effectors plays a critical role in the outcome of the infection. However, only 1% to 3% of infected patients develop gastric adenocarcinoma, emphasizing that other mechanisms regulate the localized non-specific response, including the gastric microbiota and genetic factors. This review summarizes studies describing the factors that induce and regulate the mucosal innate immune response during H. pylori infection.
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Affiliation(s)
- Alain P Gobert
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Nashville, Tennessee; Center for Mucosal Inflammation and Cancer, Nashville, Tennessee; Program in Cancer Biology, Nashville, Tennessee.
| | - Keith T Wilson
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Nashville, Tennessee; Center for Mucosal Inflammation and Cancer, Nashville, Tennessee; Program in Cancer Biology, Nashville, Tennessee; Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee; Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee.
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4
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Akbari S, Rezaeian T, Mohammadzadeh R, Meshkat Z, Namdar AB, Aryan E, Youssefi M, Pishdadian A, Ahmadi A, Farsiani H. Investigation of association between iceA, babA2, and oipA genotypes of Helicobacter pylori and IL-8-251 T>A polymorphism with clinical outcomes in Helicobacter pylori-infected Iranian patients. GENE REPORTS 2021. [DOI: 10.1016/j.genrep.2021.101210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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5
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Trindade BC, Chen GY. NOD1 and NOD2 in inflammatory and infectious diseases. Immunol Rev 2020; 297:139-161. [PMID: 32677123 DOI: 10.1111/imr.12902] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 06/23/2020] [Accepted: 06/24/2020] [Indexed: 12/12/2022]
Abstract
It has been long recognized that NOD1 and NOD2 are critical players in the host immune response, primarily by their sensing bacterial peptidoglycan-conserved motifs. Significant advances have been made from efforts that characterize their upstream activators, assembly of signaling complexes, and activation of downstream signaling pathways. Disruption in NOD1 and NOD2 signaling has also been associated with impaired host defense and resistance to the development of inflammatory diseases. In this review, we will describe how NOD1 and NOD2 sense microbes and cellular stress to regulate host responses that can affect disease pathogenesis and outcomes.
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Affiliation(s)
- Bruno C Trindade
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Grace Y Chen
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
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6
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de Almeida NM, Fernandes A, Romãozinho JM, Freire P, Donato MM, Cardoso O, Luxo C, Cipriano MA, Marinho C, Calhau C, Figueiredo P. Correlation of
NOD2
genotypes with
Helicobacter pylori
infection in a
South‐European
country. ADVANCES IN DIGESTIVE MEDICINE 2020. [DOI: 10.1002/aid2.13210] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Nuno Miguel de Almeida
- Gastroenterology Department Centro Hospitalar e Universitário de Coimbra Coimbra Portugal
- Faculty of Medicine University of Coimbra Coimbra Portugal
| | | | - José Manuel Romãozinho
- Gastroenterology Department Centro Hospitalar e Universitário de Coimbra Coimbra Portugal
- Faculty of Medicine University of Coimbra Coimbra Portugal
| | - Paulo Freire
- Faculty of Medicine University of Coimbra Coimbra Portugal
| | - Maria M. Donato
- CIMAGO, Faculty of Medicine University of Coimbra Coimbra Portugal
| | - Olga Cardoso
- Laboratory of Microbiology, Faculty of Pharmacy University of Coimbra Coimbra Portugal
- CIEPQPF, Faculty of Sciences and Technology University of Coimbra Coimbra Portugal
| | - Cristina Luxo
- Laboratory of Microbiology, Faculty of Pharmacy University of Coimbra Coimbra Portugal
- CIEPQPF, Faculty of Sciences and Technology University of Coimbra Coimbra Portugal
| | | | - Carol Marinho
- Pathology Department Centro Hospitalar e Universitário de Coimbra Coimbra Portugal
| | - Carlos Calhau
- Gastroenterology Department Centro Hospitalar e Universitário de Coimbra Coimbra Portugal
| | - Pedro Figueiredo
- Gastroenterology Department Centro Hospitalar e Universitário de Coimbra Coimbra Portugal
- Faculty of Medicine University of Coimbra Coimbra Portugal
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7
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Clyne M, Rowland M. The Role of Host Genetic Polymorphisms in Helicobacter pylori Mediated Disease Outcome. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1149:151-172. [PMID: 31016623 DOI: 10.1007/5584_2019_364] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The clinical outcome of infection with the chronic gastric pathogen Helicobacter pylori is not the same for all individuals and also differs in different ethnic groups. Infection occurs in early life (<3 years of age), and while all infected persons mount an immune response and develop gastritis, the majority of individuals are asymptomatic. However, up to 10-15% develop duodenal ulceration, up to 1% develop gastric cancer (GC) and up to 0.1% can develop gastric mucosa-associated lymphoid tissue (MALT) lymphoma. The initial immune response fails to clear infection and H. pylori can persist for decades. H. pylori has been classified as a group one carcinogen by the WHO. Interestingly, development of duodenal ulceration protects against GC. Factors that determine the outcome of infection include the genotype of the infecting strains and the environment. Host genetic polymorphisms have also been identified as factors that play a role in mediating the clinical outcome of infection. Several studies present compelling evidence that polymorphisms in genes involved in the immune response such as pro and anti-inflammatory cytokines and pathogen recognition receptors (PRRs) play a role in modulating disease outcome. However, as the number of studies grows emerging confounding factors are small sample size and lack of appropriate controls, lack of consideration of environmental and bacterial factors and ethnicity of the population. This chapter is a review of current evidence that host genetic polymorphisms play a role in mediating persistent H. pylori infection and the consequences of the subsequent inflammatory response.
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Affiliation(s)
- Marguerite Clyne
- School of Medicine and The Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin, Ireland.
| | - Marion Rowland
- School of Medicine, University College Dublin, Dublin, Ireland
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8
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Hoefsmit EP, Rozeman EA, Haanen JBAG, Blank CU. Susceptible loci associated with autoimmune disease as potential biomarkers for checkpoint inhibitor-induced immune-related adverse events. ESMO Open 2019; 4:e000472. [PMID: 31423333 PMCID: PMC6677983 DOI: 10.1136/esmoopen-2018-000472] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 03/01/2019] [Accepted: 03/19/2019] [Indexed: 12/13/2022] Open
Abstract
Unprecedented successes regarding cancer immunotherapy have been achieved, in which therapeutic agents are used to target immune cells rather than cancer cells. The most effective immunotherapy to date is the group of immune checkpoint inhibitors (CPI), targeting, for example, cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) or programmed cell death protein (PD-1). TThe combination of these therapies (anti-PD-1 with anti-CTLA-4) induces high response rates, and seem to be increased further when applied in early-stage disease. However, combined CTLA-4 plus PD-1 blockade causes frequent high-grade immune-related adverse events (irAE). To date, research on biological mechanism of irAEs is scarce and no widely accepted biomarkers predicting onset of severe irAEs have been identified. The similarity of irAEs to autoimmune disorders fuels the hypothesis that irAEs may be linked to susceptible genetic loci related to various autoimmune diseases. In this review, we extensively searched for susceptible loci associated with various autoimmune diseases, and pooled them in groups most likely to be associated with CPI-induced irAEs. These sets could be used in future research on predicting irAEs and guide physicians in a more refined and personal manner.
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Affiliation(s)
- Esmée P Hoefsmit
- Division of Molecular Oncology and Immunology, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Elisa A Rozeman
- Division of Molecular Oncology and Immunology, Netherlands Cancer Institute, Amsterdam, The Netherlands.,Medical Oncology Department, Netherlands Cancer Institute-Antoni van Leeuwenhoek Ziekenhuis, Amsterdam, The Netherlands
| | - John B A G Haanen
- Division of Molecular Oncology and Immunology, Netherlands Cancer Institute, Amsterdam, The Netherlands.,Medical Oncology Department, Netherlands Cancer Institute-Antoni van Leeuwenhoek Ziekenhuis, Amsterdam, The Netherlands
| | - Christian U Blank
- Division of Molecular Oncology and Immunology, Netherlands Cancer Institute, Amsterdam, The Netherlands.,Medical Oncology Department, Netherlands Cancer Institute-Antoni van Leeuwenhoek Ziekenhuis, Amsterdam, The Netherlands
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9
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Mukherjee T, Hovingh ES, Foerster EG, Abdel-Nour M, Philpott DJ, Girardin SE. NOD1 and NOD2 in inflammation, immunity and disease. Arch Biochem Biophys 2019; 670:69-81. [DOI: 10.1016/j.abb.2018.12.022] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 12/14/2018] [Accepted: 12/18/2018] [Indexed: 12/21/2022]
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10
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D'Ambrosio EA, Drake WR, Mashayekh S, Ukaegbu OI, Brown AR, Grimes CL. Modulation of the NOD-like receptors NOD1 and NOD2: A chemist's perspective. Bioorg Med Chem Lett 2019; 29:1153-1161. [PMID: 30890292 PMCID: PMC7679954 DOI: 10.1016/j.bmcl.2019.03.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 03/05/2019] [Accepted: 03/07/2019] [Indexed: 12/13/2022]
Abstract
The innate immune system is the body's first defense against invading microorganisms, relying on the recognition of bacterial-derived small molecules by host protein receptors. This recognition event and downstream immune response rely heavily on the specific chemical features of both the innate immune receptors and their bacterial derived ligands. This review presents a chemist's perspective on some of the most crucial and complex components of two receptors (NOD1 and NOD2): starting from the structural and chemical characteristics of bacterial-derived small molecules, to the specific proposed models of molecular recognition of these molecules by immune receptors, to the subsequent post-translational modifications that ultimately dictate downstream immune signaling. Recent advances in the field are discussed, as well as the potential for the development of targeted therapeutics.
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Affiliation(s)
| | - Walter R Drake
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Siavash Mashayekh
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Ophelia I Ukaegbu
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Ashley R Brown
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Catherine L Grimes
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA.
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11
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Domínguez MA, Landi V, Morera L, Martínez A, Jiménez-Marín Á, Garrido JJ. Identification and functional characterization of polymorphisms in promoter sequences of porcine NOD1 and NOD2 genes. Res Vet Sci 2019; 124:310-316. [PMID: 31030118 DOI: 10.1016/j.rvsc.2019.04.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 02/17/2019] [Accepted: 04/10/2019] [Indexed: 02/06/2023]
Abstract
NOD-like receptors (NLRs) play a key role in the innate immune system, acting as a second line of surveillance against pathogens. NLRs detect particular bacteria that have gained access to the cytoplasm, evading recognition by other pattern recognition receptors, such as Toll-like receptors. It has been demonstrated that coding sequence-single nucleotide polymorphisms may alter the ligand recognition ability of NLRs, affecting their pathogen-sensing function. However, there have been no data relating to the identification and functional analysis of SNPs in porcine NLR promoters. We examined the promoter sequences of the porcine NOD1 and NOD2 genes with the aim to identify and to evaluate the effect of genetic variations on promoter activity. Six SNPs in NOD1 and three SNPs in NOD2 were identified. Luciferase reporter gene assays showed significant differences in promoter activity between allele variants of NOD1 -920G>A (NC_010460.4:g.42431413G>A) and NOD2 -1670G>A (NC_010448.4:g.34169122T>C) SNPs. The results suggest that promoter polymorphisms could modify the expression levels of porcine NOD1 and NOD2 genes.
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Affiliation(s)
- Miguel A Domínguez
- Laboratorio de Genética Molecular y Zoonosis, Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma Benito Juárez de Oaxaca, Mexico; Departamento de Genética, Facultad de Veterinaria, Universidad de Córdoba, 14071 Córdoba, Spain.
| | - Vincenzo Landi
- Departamento de Genética, Facultad de Veterinaria, Universidad de Córdoba, 14071 Córdoba, Spain
| | - Luis Morera
- Departamento de Genética, Facultad de Veterinaria, Universidad de Córdoba, 14071 Córdoba, Spain
| | - Amparo Martínez
- Departamento de Genética, Facultad de Veterinaria, Universidad de Córdoba, 14071 Córdoba, Spain
| | - Ángeles Jiménez-Marín
- Departamento de Genética, Facultad de Veterinaria, Universidad de Córdoba, 14071 Córdoba, Spain
| | - Juan J Garrido
- Departamento de Genética, Facultad de Veterinaria, Universidad de Córdoba, 14071 Córdoba, Spain
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12
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Haunshi S, Burramsetty AK, Ramasamy K, Chatterjee RN. Polymorphisms in pattern recognition receptor genes of indigenous and White Leghorn breeds of chicken. Arch Anim Breed 2018; 61:441-449. [PMID: 32175451 PMCID: PMC7065405 DOI: 10.5194/aab-61-441-2018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 10/23/2018] [Indexed: 12/26/2022] Open
Abstract
Functional polymorphisms in pattern recognition receptors (PRRs) modulate
innate immunity and play a crucial role in resistance or susceptibility to
diseases. The present study was carried out to explore polymorphic patterns
in the coding sequences of PRR genes TLR3, TLR1LA (TLRs),
MDA5, LGP2 (RLRs) and NOD1 (NLR) in chicken breeds
of India, namely Ghagus (GH), Nicobari (NB) and the exotic
White Leghorn (WLH) breed. Out of 209 SNPs observed in five genes among three
breeds, 117 were synonymous (Syn) and 92 were non-synonymous (NS) SNPs. In
TLR genes the highest polymorphism was observed in NB (16, 28)
compared to GH (14, 16) and WLH (13, 19) breeds. In the MDA5 gene
the highest polymorphism was observed in GH (12) compared to NB (eight) and
WLH (four) breeds. However, an almost similar level of polymorphism was observed
in the LGP2 gene among the three breeds. In the NOD1 gene, the highest
polymorphism was observed in NB (27), followed by WLH (11) and GH (10) breeds.
The overall highest number of SNPs was observed in NB (90), followed by GH (62)
and the WLH (57) breed. With regard to variation in polymorphism among different
classes of PRRs, the study revealed the highest polymorphism in TLRs compared to
NOD1 and the RLR class of PRRs. Further, the domain locations of various Syn and
NS SNPs in each PRR among the three breeds were identified. In silico
analysis of NS SNPs revealed that most of them had a neutral effect on
protein function. However, two each in TLR1LA and LGP2
and one in the MDA5 gene were predicted to be deleterious to
protein function. The present study unravelled extensive polymorphism in the
coding sequences of the TLR and NLR class of PRR genes, and the polymorphism was
higher in indigenous chicken breeds.
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Affiliation(s)
- Santosh Haunshi
- ICAR-Directorate of Poultry Research, Rajendranagar, Hyderabad, India
| | - Arun Kumar Burramsetty
- Current Address: MEXT Doctoral Scholar, Graduate School of Comprehensive Human Sciences, Department of Biomedical Sciences, University of Tsukuba, Tsukuba, Japan
| | - Kannaki Ramasamy
- ICAR-Directorate of Poultry Research, Rajendranagar, Hyderabad, India
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Minaga K, Watanabe T, Kamata K, Asano N, Kudo M. Nucleotide-binding oligomerization domain 1 and Helicobacter pylori infection: A review. World J Gastroenterol 2018; 24:1725-1733. [PMID: 29713127 PMCID: PMC5922992 DOI: 10.3748/wjg.v24.i16.1725] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/03/2018] [Accepted: 04/09/2018] [Indexed: 02/06/2023] Open
Abstract
Nucleotide-binding oligomerization domain 1 (NOD1) is an intracellular innate immune sensor for small molecules derived from bacterial cell components. NOD1 activation by its ligands leads to robust production of pro-inflammatory cytokines and chemokines by innate immune cells, thereby mediating mucosal host defense systems against microbes. Chronic gastric infection due to Helicobacter pylori (H. pylori) causes various upper gastrointestinal diseases, including atrophic gastritis, peptic ulcers, and gastric cancer. It is now generally accepted that detection of H. pylori by NOD1 expressed in gastric epithelial cells plays an indispensable role in mucosal host defense systems against this organism. Recent studies have revealed the molecular mechanism by which NOD1 activation caused by H. pylori infection is involved in the development of chronic gastritis and gastric cancer. In this review, we have discussed and summarized how sensing of H. pylori by NOD1 mediates the prevention of chronic gastritis and gastric cancer.
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Affiliation(s)
- Kosuke Minaga
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka 589-8511, Japan
| | - Tomohiro Watanabe
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka 589-8511, Japan
| | - Ken Kamata
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka 589-8511, Japan
| | - Naoki Asano
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Miyagi 980-8574, Japan
| | - Masatoshi Kudo
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka 589-8511, Japan
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14
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Tourani M, Habibzadeh M, Shokri-Shirvani J, Teymournejad O, Mostafazadeh A, Khafri S, Nouri HR. Association ofHelicobacter pyloriinfection with Toll-like receptor-4 Thr399Ile polymorphism increased the risk of peptic ulcer development in North of Iran. APMIS 2017; 126:76-84. [DOI: 10.1111/apm.12779] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Accepted: 09/05/2017] [Indexed: 02/06/2023]
Affiliation(s)
- Mehdi Tourani
- Cellular and Molecular Biology Research Center; Health Research Institute; Babol University of Medical Sciences; Babol Iran
| | - Maryam Habibzadeh
- Student Research Committee; Babol University of Medical Sciences; Babol Iran
| | | | - Omid Teymournejad
- Faculty of Medical Sciences; Department of Bacteriology; Tarbiat Modares University; Tehran Iran
| | - Amrollah Mostafazadeh
- Department of Immunology; School of Medicine; Babol University of Medical Sciences; Babol Iran
| | - Soraya Khafri
- Biostatistics & Epidemiology Department; Babol University of Medical Sciences; Babol Iran
| | - Hamid Reza Nouri
- Cellular and Molecular Biology Research Center; Health Research Institute; Babol University of Medical Sciences; Babol Iran
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15
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Spanou E, Kalisperati P, Pateras IS, Papalampros A, Barbouti A, Tzioufas AG, Kotsinas A, Sougioultzis S. Genetic Variability as a Regulator of TLR4 and NOD Signaling in Response to Bacterial Driven DNA Damage Response (DDR) and Inflammation: Focus on the Gastrointestinal (GI) Tract. Front Genet 2017; 8:65. [PMID: 28611823 PMCID: PMC5447025 DOI: 10.3389/fgene.2017.00065] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Accepted: 05/09/2017] [Indexed: 12/13/2022] Open
Abstract
The fundamental role of human Toll-like receptors (TLRs) and NOD-like receptors (NLRs), the two most studied pathogen recognition receptors (PRRs), is the protection against pathogens and excessive tissue injury. Recent evidence supports the association between TLR/NLR gene mutations and susceptibility to inflammatory, autoimmune, and malignant diseases. PRRs also interfere with several cellular processes, such as cell growth, apoptosis, cell proliferation, differentiation, autophagy, angiogenesis, cell motility and migration, and DNA repair mechanisms. We briefly review the impact of TLR4 and NOD1/NOD2 and their genetic variability in the process of inflammation, tumorigenesis and DNA repair, focusing in the gastrointestinal tract. We also review the available data on new therapeutic strategies utilizing TLR/NLR agonists and antagonists for cancer, allergic diseases, viral infections and vaccine development against both infectious diseases and cancer.
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Affiliation(s)
- Evagelia Spanou
- Gastroenterology Division, Department of Pathophysiology, “Laikon” General Hospital, University of AthensAthens, Greece
| | - Polyxeni Kalisperati
- Gastroenterology Division, Department of Pathophysiology, “Laikon” General Hospital, University of AthensAthens, Greece
| | - Ioannis S. Pateras
- Department of Histology and Embryology, University of AthensAthens, Greece
| | - Alexandros Papalampros
- 1st Department of Surgery, “Laikon” General Hospital, University of AthensAthens, Greece
| | - Alexandra Barbouti
- Department of Anatomy-Histology-Embryology, University of IoanninaIoannina, Greece
| | - Athanasios G. Tzioufas
- Department of Pathophysiology, “Laikon” General Hospital, University of AthensAthens, Greece
| | | | - Stavros Sougioultzis
- Gastroenterology Division, Department of Pathophysiology, “Laikon” General Hospital, University of AthensAthens, Greece
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16
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Ma J, Wu D, Hu X, Li J, Cao M, Dong W. Associations between cytokine gene polymorphisms and susceptibility to Helicobacter pylori infection and Helicobacter pylori related gastric cancer, peptic ulcer disease: A meta-analysis. PLoS One 2017; 12:e0176463. [PMID: 28453551 PMCID: PMC5409176 DOI: 10.1371/journal.pone.0176463] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 04/11/2017] [Indexed: 12/20/2022] Open
Abstract
Objectives The aim of this study is to clarify the associations between IL-1B31C/T, IL-1B-511C/T, IL-8-251T/A gene polymorphisms and the risk of Helicobacter pylori (H. pylori) infection together with H. pylori-related gastric cancer (GC), peptic ulcer disease (PUD). Methods All eligible literature published up to July 2016 were identified by searching Pubmed, Embase, Web of Science and CNKI. Pooled odds ratio (OR) and 95% confidence interval (95% CI) were calculated using a fixed or random effects model. Results 29 case-control studies were eligible, and each of them may focus on more than one gene polymorphism. Ultimately, there were 21 studies (3159 cases and 2816 controls) for IL-1B-31C/T, 16 studies (2486 cases and 1989 controls) for IL-1B-511C/T polymorphisms, 9 studies (1963 cases and 1205 controls) for IL-8-251T/A polymorphisms. Overall, an increased risk of H. pylori infection was found for IL-1B-31C/T polymorphisms in total population [OR = 1.134, 95%CI = 1.008–1.275 for recessive model; OR = 1.145, 95%CI = 1.007–1.301 for TT vs CC model]. While, for IL-1B-511C/T and IL8-251T/A polymorphisms, no evidence indicated that they were associated with the risk of H. pylori infection in all genetic models. Furthermore, we found an increased risk of H. pylori-related GC with IL-1B-511C/T polymorphisms [OR = 1.784, 95%CI = 1.289–2.469 for recessive model; OR = 1.772, 95%CI = 1.210–2.594 for TT vs CC model] and IL8-251A/T polymorphisms [OR = 1.810, 95%CI = 1.229–2.667 for recessive model; OR = 1.717, 95%CI = 1.143–2.580 for TT vs AA model], an increased risk of H. pylori-related PUD with IL8-251T/A polymorphisms [OR = 1.364, 95%CI = 1.010–1.843 for recessive model; OR = 1.427, 95%CI = 1.039–1.959 for AA vs TT model]. Conclusions IL-1B-31C/T gene polymorphisms might increase H. pylori infection risk. IL-1B-511-C/T and IL-8-251T/A gene polymorphisms might act as a risk factor to H. pylori-related diseases including GC or PUD
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Affiliation(s)
- Jingjing Ma
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Dandan Wu
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Xue Hu
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Jiao Li
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Mingwei Cao
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Weiguo Dong
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
- * E-mail:
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Interleukin 8 (-251 T>A) polymorphism in children and teenagers infected with Helicobacter pylori. J Venom Anim Toxins Incl Trop Dis 2017; 23:23. [PMID: 28405201 PMCID: PMC5385065 DOI: 10.1186/s40409-017-0113-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 04/01/2017] [Indexed: 02/08/2023] Open
Abstract
Background Helicobacter pylori (H. pylori) is a gram-negative bacterium that colonizes the human stomach and causes a variety of gastric diseases. This study evaluated the correlations between the -251 (T>A) (rs4073) polymorphism of interleukin-8 (IL-8), the etiology of gastric disease, and H. pylori infection in pediatric and adolescent patients. Methods DNA samples were obtained from 285 gastric biopsies from pediatric patients. H. pylori was detected by PCR, whereas PCR-RFLP was used to characterize the -251 (T>A) polymorphism of IL-8. Results The histological analysis revealed the presence of gastritis in 158 patients (55.44%). H. pylori was found in 71 samples (24.9%). The -251 (T>A) polymorphism revealed that 58 (29.47%) samples were TT, 143 (50.18%) samples were TA, and 84 (20.35%) samples were AA. Conclusions Our findings suggest that IL8-251 A allele may be an important risk factor for the development of gastric disease when associated with H. pylori infection.
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18
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Wirth HP, Yang M. Different Pathophysiology of Gastritis in East and West? A Western Perspective. Inflamm Intest Dis 2016; 1:113-122. [PMID: 29922666 DOI: 10.1159/000446300] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 04/13/2016] [Indexed: 12/11/2022] Open
Abstract
Background Gastritis results from multifactorial gastric mucosal injury. Helicobacter pylori (Hp) is the main cause, and associated diseases have typical underlying patterns of gastritis. Gastric ulcer and gastric cancer (GC) develop from chronic atrophic corpus gastritis (CAG) which therefore represents the most important pattern. GC incidences in East Asia are substantially higher than elsewhere, and this should be also reflected by higher prevalences of CAG and characteristic differences in pathophysiology compared to the West. Summary The few available comparative studies of gastritis in Eastern and Western patients are summarized. The main pathogenic factors of gastritis are discussed together with their limitations to explain local differences in disease outcome. Emphasis was put to also include less well-established pathogenic host and environmental factors of possible impact. Conclusions CAG is more prevalent in East Asian areas with high GC incidences than the West. Geographic heterogeneity of associated diseases is due to differences in Hp prevalence and virulence as well as modulating host and environmental factors. The following may contribute to the higher burden of CAG in the East: ABD type of CagA with vacA s1 and babA2 alleles of Hp, host Lewis(b) expression in sej/sej nonsecretors, H. heilmannii, low parietal cell mass, high sodium and nitrate intake, preferences in vegetable and fruit consumption, cigarette smoking, air pollution, alcohol. Conversely, green tea, nonfermented soy products and rice may confer protective effects. Hp is on the decline, but also in a world cleared from this bacterium, differences in host genetics will continue to modify gastric disease outcome together with maintained customs as part of cultural diversity.
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Affiliation(s)
| | - Manqiao Yang
- GastroZentrumKreuzlingen, Kreuzlingen, Switzerland
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19
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Maharana J, Dehury B, Sahoo JR, Jena I, Bej A, Panda D, Sahoo BR, Patra MC, Pradhan SK. Structural and functional insights into CARDs of zebrafish (Danio rerio) NOD1 and NOD2, and their interaction with adaptor protein RIP2. MOLECULAR BIOSYSTEMS 2016; 11:2324-36. [PMID: 26079944 DOI: 10.1039/c5mb00212e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Nucleotide-binding and oligomerization domain-containing protein 1 (NOD1) and NOD2 are cytosolic pattern-recognition receptors (PRRs) composed of an N-terminal caspase activation and recruitment domain (CARD), a central NACHT domain and C-terminal leucine-rich repeats (LRRs). They play a vital role in innate immune signaling by activating the NF-κB pathway via recognition of peptidoglycans by LRRs, and ATP-dependent self-oligomerization of NACHT followed by downstream signaling. After oligomerization, CARD/s play a crucial role in activating downstream signaling via the adaptor molecule, RIP2. Due to the inadequacy of experimental 3D structures of CARD/s of NOD2 and RIP2, and results from differential experimental setups, the RIP2-mediated CARD-CARD interaction has remained as a contradictory statement. We employed a combinatorial approach involving protein modeling, docking, molecular dynamics simulation, and binding free energy calculation to illuminate the molecular mechanism that shows the possible involvement of either the acidic or basic patch of zebrafish NOD1/2-CARD/a and RIP2-CARD in CARD-CARD interaction. Herein, we have hypothesized 'type-I' mode of CARD-CARD interaction in NOD1 and NOD2, where NOD1/2-CARD/a involve their acidic surfaces to interact with RIP2. Asp37 and Glu51 (of NOD1) and Arg477, Arg521 and Arg529 (of RIP2) were identified to be crucial for NOD1-RIP2 interaction. However, in NOD2-RIP2, Asp32 (of NOD2) and Arg477 and Arg521 (of RIP2) were anticipated to be significant for downstream signaling. Furthermore, we found that strong electrostatic contacts and salt bridges are crucial for protein-protein interactions. Altogether, our study has provided novel insights into the RIP2-mediated CARD-CARD interaction in zebrafish NOD1 and NOD2, which will be helpful to understand the molecular basis of the NOD1/2 signaling mechanism.
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Affiliation(s)
- Jitendra Maharana
- Department of Bioinformatics, Orissa University of Agriculture and Technology, Bhubaneswar-751003, Odisha, India.
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Chua KH, Ng JG, Ng CC, Hilmi I, Goh KL, Kee BP. Association of NOD1, CXCL16, STAT6 and TLR4 gene polymorphisms with Malaysian patients with Crohn's disease. PeerJ 2016; 4:e1843. [PMID: 27069792 PMCID: PMC4824893 DOI: 10.7717/peerj.1843] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2015] [Accepted: 03/03/2016] [Indexed: 12/11/2022] Open
Abstract
Crohn's disease (CD) is a prominent type of inflammatory bowel disease (IBD) that can affect any part of the gastrointestinal tract. CD is known to have higher prevalence in the Western countries, but the number of cases has been increasing in the past decades in Asia, including Malaysia. Therefore, there is a need to investigate the underlining causes of CD that may shed light on its prevention and treatment. In this study, genetic polymorphisms in NOD1 (rs2075820), CXCL16 (rs2277680), STAT6 (rs324015) and TLR4 (rs4986791) genes were examined in a total of 335 individuals (85 CD patients and 250 healthy controls) with PCR-RFLP approach. There was no significant association observed between NOD1 rs2075820 and STAT6 rs324015 with the onset of CD in the studied cohort. However, the G allele of CXCL16 rs2277680 was found to have a weak association with CD patients (P = 0.0482; OR = 1.4310). The TLR4 rs4986791 was also significantly associated to CD. Both the homozygous C genotype (P = 0.0029; OR = 0.3611) and C allele (P = 0.0069; OR = 0.4369) were observed to confer protection against CD. On the other hand, the heterozygous C/T genotype was a risk genotype (P = 0.0015; OR = 3.1392). Further ethnic-stratified analysis showed that the significant associations in CXCL16 rs2277680 and TLR4 rs4986791 were accounted by the Malay cohort. In conclusion, the present study reported two CD-predisposing loci in the Malay CD patients. However, these loci were not associated to the onset of CD in Chinese and Indian patients.
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Affiliation(s)
- Kek Heng Chua
- Department of Biomedical Science, Faculty of Medicine, Universiti Malaya , Kuala Lumpur , Malaysia
| | - Jin Guan Ng
- Division of Genetics and Molecular Biology, Institute of Biological Science, Faculty of Science, Universiti Malaya , Kuala Lumpur , Malaysia
| | - Ching Ching Ng
- Division of Genetics and Molecular Biology, Institute of Biological Science, Faculty of Science, Universiti Malaya , Kuala Lumpur , Malaysia
| | - Ida Hilmi
- Division of Gastroenterology and Hepatology, Department of Medicine, Faculty of Medicine, Universiti Malaya , Kuala Lumpur , Malaysia
| | - Khean Lee Goh
- Division of Gastroenterology and Hepatology, Department of Medicine, Faculty of Medicine, Universiti Malaya , Kuala Lumpur , Malaysia
| | - Boon Pin Kee
- Department of Biomedical Science, Faculty of Medicine, Universiti Malaya , Kuala Lumpur , Malaysia
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Kim BJ, Kim JY, Hwang ES, Kim JG. Nucleotide Binding Oligomerization Domain 1 Is an Essential Signal Transducer in Human Epithelial Cells Infected with Helicobacter pylori That Induces the Transepithelial Migration of Neutrophils. Gut Liver 2016; 9:358-69. [PMID: 25167803 PMCID: PMC4413970 DOI: 10.5009/gnl13218] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Background/Aims The cytosolic host protein nucleotide binding oligomerization domain 1 (Nod1) has emerged as a key pathogen recognition molecule for innate immune responses in epithelial cells. The purpose of the study was to elucidate the mechanism by which Helicobacter pylori infection leads to transepithelial neutrophil migration in a Nod1-mediated manner. Methods Human epithelial cell lines AGS and Caco-2 were grown and infected with H. pylori. Interleukin (IL)-8 mRNA expression and IL-8 secretion were assessed, and nuclear factor κB (NF-κB) activation was determined. Stable transfections of AGS and Caco-2 cells with dominant negative Nod1 were generated. Neutrophil migration across the monolayer was quantified. Results Cytotoxin-associated gene pathogenicity island (cagPAI)(+) H. pylori infection upregulated IL-8 mRNA expression and IL-8 secretion in AGS and Caco-2 cells compared with controls. NF-κB activation, IL-8 mRNA expression and IL-8 secretion by cagPAI knockdown strains were reduced compared with those infected with the wild-type strain. NF-κB activation, IL-8 mRNA expression and IL-8 secretion in dominant-negative (DN)-Nod1 stably transfected cells were reduced compared with the controls. The transepithelial migration of neutrophils in DN-Nod1 stably transfected cells was reduced compared with that in controls. Conclusions Signaling through Nod1 plays an essential role in neutrophil migration induced by the upregulated NF-κB activation and IL-8 expression in H. pylori-infected human epithelial cells.
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Affiliation(s)
- Beom Jin Kim
- Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea.,Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, Korea
| | - Jae Yeol Kim
- Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea
| | - Eung Soo Hwang
- Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, Korea
| | - Jae Gyu Kim
- Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea
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22
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Pohjanen VM, Koivurova OP, Huhta H, Helminen O, Mäkinen JM, Karhukorpi JM, Joensuu T, Koistinen PO, Valtonen JM, Niemelä SE, Karttunen RA, Karttunen TJ. Toll-Like Receptor 4 Wild Type Homozygozity of Polymorphisms +896 and +1196 Is Associated with High Gastrin Serum Levels and Peptic Ulcer Risk. PLoS One 2015; 10:e0131553. [PMID: 26161647 PMCID: PMC4498789 DOI: 10.1371/journal.pone.0131553] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 06/03/2015] [Indexed: 01/14/2023] Open
Abstract
Toll-like receptor 4 is a part of the innate immune system and recognizes Helicobacter pylori lipopolysaccharide. The goal of this study was to analyze the role of Toll-like receptor 4 polymorphisms +896 (rs4986790) and +1196 (rs4986791) in the pathogenesis of Helicobacter pylori related gastroduodenal diseases in relation to gastric secretion and inflammation. Toll-like receptor 4 polymorphisms, serum gastrin-17 and pepsinogen I and II concentrations were determined, and gastroscopies with histopathological analyses were performed to 216 dyspeptic patients. As genotype controls, 179 controls and 61 gastric cancer patients were studied. In our study, the Toll-like receptor 4 +896 and +1196 polymorphisms were in total linkage disequilibrium. The homozygous wild types displayed higher gastrin-17 serum concentrations than the mutants (p = 0.001) and this effect was independent of Helicobacter pylori. The homozygous wild types also displayed an increased risk for peptic ulcers (OR: 4.390). Toll-like receptor 4 genotypes did not show any association with Helicobacter pylori positivity or the features of gastric inflammation. Toll-like receptor 4 expression was seen in gastrin and somatostatin expressing cells of antral mucosa by immunohistochemistry. Our results suggest a role for Toll-like receptor 4 in gastric acid regulation and that the Toll-like receptor 4 +896 and +1196 wild type homozygozity increases peptic ulcer risk via gastrin secretion.
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Affiliation(s)
- Vesa-Matti Pohjanen
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | | | - Heikki Huhta
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Olli Helminen
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Johanna M. Mäkinen
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Jari M. Karhukorpi
- Department of Medical Microbiology and Immunology, Institute of Diagnostics, University of Oulu, Oulu, Finland
- Eastern Finland Laboratory Centre Joint Authority Enterprise (ISLAB), Joensuu, Finland
| | - Tapio Joensuu
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
- Department of Internal Medicine, Pietarsaari City Hospital, Pietarsaari, Finland
| | | | | | - Seppo E. Niemelä
- Department of Internal Medicine, Oulu University Hospital, Oulu, Finland
| | - Riitta A. Karttunen
- Department of Medical Microbiology and Immunology, Institute of Diagnostics, University of Oulu, Oulu, Finland
| | - Tuomo J. Karttunen
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
- * E-mail:
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Yamaoka Y, Miftahussurur M. Helicobacter pylori virulence genes and host genetic polymorphisms as risk factors for peptic ulcer disease. Expert Rev Gastroenterol Hepatol 2015; 9:1535-47. [PMID: 26470920 PMCID: PMC5332543 DOI: 10.1586/17474124.2015.1095089] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Helicobacter pylori infection plays an important role in the pathogenesis of peptic ulcer disease (PUD). Several factors have been proposed as possible H. pylori virulence determinants; for example, bacterial adhesins and gastric inflammation factors are associated with an increased risk of PUD. However, differences in bacterial virulence factors alone cannot explain the opposite ends of the PUD disease spectrum, that is duodenal and gastric ulcers; presumably, both bacterial and host factors contribute to the differential response. Carriers of the high-producer alleles of the pro-inflammatory cytokines IL-1B, IL-6, IL-8, IL-10, and TNF-α who also carry low-producer allele of anti-inflammatory cytokines have severe gastric mucosal inflammation, whereas carriers of the alternative alleles have mild inflammation. Recent reports have suggested that the PSCA and CYP2C19 ultra-rapid metabolizer genotypes are also associated with PUD.
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Affiliation(s)
- Yoshio Yamaoka
- Oita University, Baylor College of Medicine Houston United States
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Castaño-Rodríguez N, Kaakoush NO, Mitchell HM. Pattern-recognition receptors and gastric cancer. Front Immunol 2014; 5:336. [PMID: 25101079 PMCID: PMC4105827 DOI: 10.3389/fimmu.2014.00336] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 07/03/2014] [Indexed: 12/12/2022] Open
Abstract
Chronic inflammation has been associated with an increased risk of several human malignancies, a classic example being gastric adenocarcinoma (GC). Development of GC is known to result from infection of the gastric mucosa by Helicobacter pylori, which initially induces acute inflammation and, in a subset of patients, progresses over time to chronic inflammation, gastric atrophy, intestinal metaplasia, dysplasia, and finally intestinal-type GC. Germ-line encoded receptors known as pattern-recognition receptors (PRRs) are critical for generating mature pro-inflammatory cytokines that are crucial for both Th1 and Th2 responses. Given that H. pylori is initially targeted by PRRs, it is conceivable that dysfunction within genes of this arm of the immune system could modulate the host response against H. pylori infection, and subsequently influence the emergence of GC. Current evidence suggests that Toll-like receptors (TLRs) (TLR2, TLR3, TLR4, TLR5, and TLR9), nucleotide-binding oligomerization domain (NOD)-like receptors (NLRs) (NOD1, NOD2, and NLRP3), a C-type lectin receptor (DC-SIGN), and retinoic acid-inducible gene (RIG)-I-like receptors (RIG-I and MDA-5), are involved in both the recognition of H. pylori and gastric carcinogenesis. In addition, polymorphisms in genes involved in the TLR (TLR1, TLR2, TLR4, TLR5, TLR9, and CD14) and NLR (NOD1, NOD2, NLRP3, NLRP12, NLRX1, CASP1, ASC, and CARD8) signaling pathways have been shown to modulate the risk of H. pylori infection, gastric precancerous lesions, and/or GC. Further, the modulation of PRRs has been suggested to suppress H. pylori-induced inflammation and enhance GC cell apoptosis, highlighting their potential relevance in GC therapeutics. In this review, we present current advances in our understanding of the role of the TLR and NLR signaling pathways in the pathogenesis of GC, address the involvement of other recently identified PRRs in GC, and discuss the potential implications of PRRs in GC immunotherapy.
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Affiliation(s)
- Natalia Castaño-Rodríguez
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales , Sydney, NSW , Australia
| | - Nadeem O Kaakoush
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales , Sydney, NSW , Australia
| | - Hazel M Mitchell
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales , Sydney, NSW , Australia
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Caleman Neto A, Rasmussen LT, de Labio RW, de Queiroz VF, Smith MDA, Viani GA, Payão SL. Gene polymorphism of interleukin 1 and 8 in chronic gastritis patients infected with Helicobacter pylori. J Venom Anim Toxins Incl Trop Dis 2014; 20:17. [PMID: 24803922 PMCID: PMC4011515 DOI: 10.1186/1678-9199-20-17] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 04/02/2014] [Indexed: 12/17/2022] Open
Abstract
Background Epidemiological investigations have indicated that Helicobacter pylori induces inflammation in the gastric mucosa regulated by several interleukins. The genes IL1B and IL8 are suggested as key factors in determining the risk of gastritis. The aim of this paper was to evaluate the association of gene polymorphism of interleukin-1 and interleukin-8 with chronic gastrits in H. pylori infected patients. A total of 60 patients underwent endoscopic procedure. Biopsy samples were collected for urease test, histopathological and molecular exams. The DNA of theses samples was extracted for detection of H. pylori and analysis of the genes mentioned above. Patients with gastritis had a higher frequency of H. pylori-positive samples. Results H. pylori was detected in 30/60 patients (50%) by PCR. As for polymorphism of interleukin 8 (-251) gene we observed a statistical difference when analyzed TA (p = 0.039) and TT (p = 0.047) genotypes. In the IL1B31 there was a statistical difference in TT (p = 0.01) genotype and in the IL1B-511 there wasn’t any statistical difference. Conclusion Our results suggest a strong correlation between the presence of chronic gastritis and infection by H. pylori and that IL1B-31TT and IL8-251TT genotypes appear to act as protective factors against H. pylori infection while IL8-251TA genotype may comprise a risk factor for infection with this bacterium.
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Affiliation(s)
- Agostinho Caleman Neto
- Department of Genetics, FAMEMA Blood Center, Marília Medical School (FAMEMA), Marília, São Paulo State, Brazil
| | | | - Roger W de Labio
- Department of Genetics, FAMEMA Blood Center, Marília Medical School (FAMEMA), Marília, São Paulo State, Brazil
| | - Valdeir F de Queiroz
- Department of Digestive System Surgery, Marília Medical School (FAMEMA), Marília, São Paulo State, Brazil
| | - Marília de Ac Smith
- Department of Morphology, Federal University of São Paulo (UNIFESP), São Paulo, São Paulo State, Brazil
| | - Gustavo A Viani
- Department of Radiotherapy and Oncology, Marília Medical School (FAMEMA), Marília, São Paulo State, Brazil
| | - Spencer Lm Payão
- Department of Genetics, FAMEMA Blood Center, Marília Medical School (FAMEMA), Marília, São Paulo State, Brazil ; Sacred Heart University (USC), Bauru, São Paulo State, Brazil ; Laboratório de Genética, Hemocentro, FAMEMA, Rua Lourival Freire, 240, Bairro Fragata, Marília, São Paulo CEP 17519-050, Brazil
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26
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Relevance of single-nucleotide polymorphisms in human TLR genes to infectious and inflammatory diseases and cancer. Genes Immun 2014; 15:199-209. [DOI: 10.1038/gene.2014.10] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 01/30/2014] [Accepted: 02/03/2014] [Indexed: 02/07/2023]
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Mayle S, Monie TP. The nucleotide-binding oligomerization domain-containing protein 1 (NOD1) polymorphism S7N does not affect receptor function. BMC Res Notes 2014; 7:124. [PMID: 24598002 PMCID: PMC3975860 DOI: 10.1186/1756-0500-7-124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 02/28/2014] [Indexed: 11/10/2022] Open
Abstract
Background Activation and signal transduction in the Nucleotide binding, leucine-rich repeat containing receptor (NLR) family needs to be tightly regulated in order to control the inflammatory response to exogenous and endogenous danger signals. Phosphorylation is a common cellular mechanism of regulation that has recently been shown to be important in signalling in another family of cytoplasmic pattern recognition receptors, the RIG-I like receptors. In addition, single nucleotide polymorphisms can alter receptor activity, potentially leading to dysfunction and/or a predisposition to inflammatory barrier diseases. Findings We have computationally analysed the N-terminus of NOD1 and found seven theoretical phosphorylation sites in, or immediately before, the NOD1 Caspase Activation Domain (CARD). Two of these, serine 7 and tyrosine 49 are also found as rare polymorphisms in the African-American population and European-American populations respectively. Mutating serine 7 to either an aspartic acid or an asparagine to mimic the potential impact of phosphorylation or the polymorphism respectively did not affect the response of NOD1 to ligand-mediated NFκB signalling. Conclusions The NOD1 polymorphism S7N does not interfere with receptor function in response to ligand stimulation.
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Affiliation(s)
| | - Tom P Monie
- Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, CB2 1GA, Cambridge, UK.
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He C, Chen M, Liu J, Yuan Y. Host genetic factors respond to pathogenic step-specific virulence factors of Helicobacter pylori in gastric carcinogenesis. MUTATION RESEARCH. REVIEWS IN MUTATION RESEARCH 2014; 759:14-26. [PMID: 24076409 DOI: 10.1016/j.mrrev.2013.09.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Revised: 09/13/2013] [Accepted: 09/13/2013] [Indexed: 12/18/2022]
Abstract
The interindividual differences in risk of Helicobacter pylori (H. pylori)-associated gastric cancer involve significant heterogeneities of both host genetics and H. pylori strains. Several recent studies proposed a distinct sequence for H. pylori exerting its virulence in the host stomach: (i) adhering to and colonizing the surface of gastric epithelial cells, (ii) evading and attenuating the host defense, and (iii) invading and damaging the gastric mucosa. This review focuses on several key issues that still need to be clarified, such as which virulence factors of H. pylori are involved in the three pathogenic steps, which host genes respond to the step-specific virulence factors, and whether and/or how the corresponding host genetic variations influence the risk of gastric carcinogenesis. Urease, BabA and SabA in the adhesion-step, PGN and LPS in the immune evasion-step, and CagA, VacA and Tipα in the mucosal damage-step were documented to play an important role in step-specific pathogenicity of H. pylori infection. There is evidence further supporting a role of potentially functional polymorphisms of host genes directly responding to these pathogenic step-specific virulence factors in the susceptibility of gastric carcinogenesis, especially for urease-interacting HLA class II genes, BabA-interacting MUC1, PGN-interacting NOD1, LPS-interacting TLR4, and CagA-interacting PTPN11 and CDH1. With the continuous improvement of understanding the genetic profile of H. pylori-associated gastric carcinogenesis, a person at increased risk for gastric cancer may benefit from several aspects of efforts: (i) prevent H. pylori infection with a vaccine targeting certain step-specific virulence factor; (ii) eradicate H. pylori infection by blocking step-specific psychopathological characteristics of virulence factors; and (iii) adjust host physiological function to resist the carcinogenic role of step-specific virulence factors or interrupt the cellular signal transduction of the interplay between H. pylori and host in each pathogenic step, especially for the subjects with precancerous lesions in the stomach.
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Affiliation(s)
- Caiyun He
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University; Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Education Department, Shenyang 110001, China
| | - Moye Chen
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University; Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Education Department, Shenyang 110001, China
| | - Jingwei Liu
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University; Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Education Department, Shenyang 110001, China
| | - Yuan Yuan
- Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University; Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Education Department, Shenyang 110001, China.
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de Zoete MR, Flavell RA. Interactions between Nod-Like Receptors and Intestinal Bacteria. Front Immunol 2013; 4:462. [PMID: 24381573 PMCID: PMC3865441 DOI: 10.3389/fimmu.2013.00462] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 12/03/2013] [Indexed: 12/12/2022] Open
Abstract
Nucleotide oligomerization domain (Nod)-like Receptors (NLRs) are cytosolic sensors that mediate the activation of Caspase-1 and the subsequent processing and secretion of the pro-inflammatory cytokines IL-1β and IL-18, as well as an inflammatory cell death termed pyroptosis. While a multitude of bacteria have been shown to activate one or more NLRs under in vitro conditions, the exact impact of NLR activation during the course of colonization, both of pathogenic and commensal nature, is less understood. In this review, we will focus on the role of intestinal NLRs during the various stages of infection with common gastrointestinal bacterial pathogens, as well as NLR function in controlling and shaping the microbiota.
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Affiliation(s)
- Marcel R de Zoete
- Department of Immunobiology, Yale University School of Medicine , New Haven, CT , USA
| | - Richard A Flavell
- Department of Immunobiology, Yale University School of Medicine , New Haven, CT , USA ; Howard Hughes Medical Institute, Yale University , New Haven, CT , USA
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Kim EJ, Lee JR, Chung WC, Jung SH, Sung HJ, Lee YW, Oh YS, Kim SB, Paik CN, Lee KM, Noh SJ. Association between genetic polymorphisms of NOD 1 and Helicobacter pylori-induced gastric mucosal inflammation in healthy Korean population. Helicobacter 2013; 18:143-50. [PMID: 23136938 DOI: 10.1111/hel.12020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Gastric cancer is supposed to be a result of inflammation induced by Helicobacter pylori (H. pylori) infection. Nucleotide-binding oligomerization domain 1 (NOD 1) is required for the innate immune response to H. pylori. We aim to investigate whether single nucleotide polymorphism (SNP) in NOD 1 gene is associated with H. pylori-induced gastric mucosal inflammation in a healthy Korean population. METHODS The study was conducted on 412 adults who visited two different healthcare centers for health examinations. The G796A (E266K) NOD 1 SNP was detected by using polymerase chain reaction/restriction fragment length polymorphism. A gastritis score was calculated by the summed values of the grade and the activity of gastritis scored according to the updated Sydney system. The expression of IL-8 and COX-2 mRNA was assessed by quantitative reverse transcription polymerase chain reaction. In the group with H. pylori infection, the complete screening of the genes comprising the cag PAI was performed. RESULTS The genotype frequencies were 26.7% (AA type), 58.3% (GA), and 15.0% (GG). In H. pylori-positive patients, gastritis score of the AA genotype was significantly higher than those of the others (p = .04). Also, the IL-8 and COX-2 mRNA levels increased in the AA genotype. In the group with H. pylori infection, 31.9% were found to carry the complete cag PAI. When the subjects were infected with intact cag PAI, the IL-8 and COX-2 mRNA levels were significantly high in AA genotype. CONCLUSION G796A (E266K) NOD 1 polymorphism is closely correlated with H. pylori-associated gastric mucosal inflammation in the Korean population.
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Affiliation(s)
- Eun Jung Kim
- Internal Medicine, The Catholic University of Korea, Suwon, Korea
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31
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Yang CA, Scheibenbogen C, Bauer S, Kleinle C, Wex T, Bornschein J, Malfertheiner P, Hellmig S, Schumann RR, Hamann L. A frequent Toll-like receptor 1 gene polymorphism affects NK- and T-cell IFN-γ production and is associated with Helicobacter pylori-induced gastric disease. Helicobacter 2013; 18:13-21. [PMID: 23067142 DOI: 10.1111/hel.12001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
BACKGROUND Helicobacter pylori infects approximately 50% of the world population. Among the infected individuals, only 10-20% develop peptic ulcers and <3% progress to gastric cancer (GC). Th1-predominant immune responses have been suggested to underlie H. pylori-induced gastric diseases. However, the reason for a strong inter-individual variation of susceptibility and course of the disease is currently far from being understood. It has been shown that H. pylori stimulates the host's Toll-like receptor (TLR) 2/1 complex. Furthermore, the single nucleotide polymorphism (SNP) I602S of TLR1 alters the inflammatory cytokine response of monocytes. Therefore, we hypothesized an association of this TLR1 SNP with H. pylori-mediated gastric pathologies. MATERIALS AND METHODS Subjects with different TLR1 genotypes were analyzed for their IFN-γ response of NK- and T-cells. We further genotyped 548 patients with gastric diseases for this SNP and compared patients with gastritis with those having ulcer, and patients with high-risk gastritis versus patients with GC. RESULTS Homozygous 602S allele carriers exhibited impaired in vitro IFN-γ responses to the TLR2/1 agonist Pam(3) CSK(4). The TLR1 I602S SNP is significantly associated with GC (p = .002) and gastric ulcer (p = .051). Odds ratios showed significantly reduced risk regarding GC and peptic ulcer for the homozygous mutated genotype. The odds ratios were 0.4 (95% CI, 0.22-0.72) and 0.588 (95% CI, 0.35-1.00), respectively. CONCLUSION In conclusion, our results suggest that the nonfunctional TLR1 602S/S genotype is associated with a reduced risk of H. pylori-induced gastric diseases, probably via diminished Th1 responses.
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Affiliation(s)
- Chin-An Yang
- Institute of Medical Immunology CVK, Charité-University Medical Center, Berlin, Germany
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Castaño-Rodríguez N, Mitchell HM. Peptic ulcer disease: current notions. MICROBIOLOGY AUSTRALIA 2013. [DOI: 10.1071/ma13049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Yin YW, Hu AM, Sun QQ, Zhang BB, Wang Q, Liu HL, Zeng YH, Xu RJ, Zhang SJ, Shi LB. Association between interleukin-8 gene -251 T/A polymorphism and the risk of peptic ulcer disease: a meta-analysis. Hum Immunol 2012; 74:125-30. [PMID: 23000201 DOI: 10.1016/j.humimm.2012.09.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2012] [Revised: 08/29/2012] [Accepted: 09/10/2012] [Indexed: 02/07/2023]
Abstract
It remains controversial regarding the association between interleukin-8 (IL-8) gene -251 T/A polymorphism and peptic ulcer disease (PUD) risk. Thus, a large-scale meta-analysis evaluating the precise association between this gene variant and PUD risk is required. We searched the PubMed, Embase, Web of Science, and Google Scholar until April 25, 2012. Additionally, hand searching of the references of identified articles were performed. All the statistical tests were performed using Stata 11.0. A total of eight studies (3105 subjects) were included in this meta-analysis. Overall, no significant association was found between IL-8 gene -251 T/A polymorphism and PUD risk (for A allele vs. T allele: OR = 1.17, 95% CI = 0.97-1.41, p = 0.094; for A/A vs. T/T: OR = 1.33, 95% CI = 0.94-1.90, p = 0.108; for A/A vs. A/T+T/T: OR = 1.22, 95% CI =0.97-1.52, p = 0.083; for A/A+A/T vs. T/T: OR = 1.26, 95% CI = 0.95-1.67, p = 0.113). However, in the subgroup analyses by ethnicity, H. pylori infection and the subtype of PUD, significant associations were found between IL-8 gene -251 T/A polymorphism and PUD risk in Asians, H. pylori+, duodenal ulcer disease (DUD) and gastric ulcer disease (GUD), respectively. In summary, the present meta-analysis suggests that IL-8 gene -251 T/A polymorphism is associated with increased PUD risk among Asians, and especially for the subgroups of H. pylori+, DUD and GUD.
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Affiliation(s)
- Yan-Wei Yin
- Department of Emergency, Chinese PLA Air Force General Hospital, 30 Fucheng Road, Haidian District, Beijing 100142, China.
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Wang P, Zhang L, Jiang JM, Ma D, Tao HX, Yuan SL, Wang YC, Wang LC, Liang H, Zhang ZS, Liu CJ. Association of NOD1 and NOD2 genes polymorphisms with Helicobacter pylori related gastric cancer in a Chinese population. World J Gastroenterol 2012; 18:2112-20. [PMID: 22563200 PMCID: PMC3342611 DOI: 10.3748/wjg.v18.i17.2112] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 12/06/2011] [Accepted: 03/10/2012] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the association between the tag single nucleotide polymorphisms (TagSNPs) of NOD1 and NOD2 and the risk of developing gastric cancer.
METHODS: We conducted a hospital-based case-control study including 296 incident gastric cancer patients and 160 gastritis controls. Eight TagSNPs in the NOD1 and NOD2 genes were selected from the Hapmap database using the haploview software and genotyped by the Sequenom MassArray system. The serum levels of anti-Helicobacter pylori (H. pylori) IgG were measured by enzyme-linked immunosorbent assay to indicate H. pylori infection. The odds ratios (OR) and 95% confidence intervals (CI) were calculated by unconditional logistic regression, including sex and age as confounding factors.
RESULTS: The NOD1 rs2907749 GG genotype showed a decreased risk for gastric cancer (OR 0.50, 95% CI: 0.26-0.95, P = 0.04) while the rs7789045 TT genotype showed an increased risk (OR 2.14, 95% CI: 1.20-3.82, P = 0.01). An elevated susceptibility to gastric cancer was observed in the subjects with H. pylori infection and the NaOD1 rs7789045 TT genotype (OR 2.05, 95% CI: 1.07-3.94, P = 0.03) or the NOD2 rs7205423 GC genotype (OR 2.52, 95% CI: 1.05-6.04, P = 0.04). Haplotype analysis suggested that the distribution of AGT (rs2907749, rs2075820 and rs7789045) in NOD1 between the cases and control groups was significantly different (P corrected: 0.04), and the diplotype AGT/AGT was associated with an elevated gastric cancer risk (OR 1.98, 95% CI: 1.04-3.79, P = 0.04). The association of the NOD1 rs7789045 TT genotype and the diplotype AGT/AGT was significant with H. pylori-related diffuse-type gastric cancer (OR 3.00, 95% CI: 1.38-6.53, P = 0.01; OR 4.02, 95% CI: 1.61-10.05, P < 0.01, respectively).
CONCLUSION: Genetic polymorphisms in NOD1 and NOD2 may interact with H. pylori infection and may play important roles in promoting the development of gastric cancer in the Chinese population.
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Verbeke H, Geboes K, Van Damme J, Struyf S. The role of CXC chemokines in the transition of chronic inflammation to esophageal and gastric cancer. Biochim Biophys Acta Rev Cancer 2011; 1825:117-29. [PMID: 22079531 DOI: 10.1016/j.bbcan.2011.10.008] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Revised: 10/28/2011] [Accepted: 10/29/2011] [Indexed: 12/12/2022]
Abstract
Chronic inflammation may increase the risk to develop cancer, for instance esophagitis or gastritis may lead to development of esophageal or gastric cancer, respectively. The key molecules attracting leukocytes to local inflammatory sites are chemokines. We here provide a systematic review on the impact of CXC chemokines (binding the receptors CXCR1, CXCR2, CXCR3 and CXCR4) on the transition of chronic inflammation in the upper gastrointestinal tract to neoplasia. CXCR2 ligands, including GRO-α,β,γ/CXCL1,2,3, ENA-78/CXCL5 and IL-8/CXCL8 chemoattract pro-tumoral neutrophils. In addition, angiogenic CXCR2 ligands stimulate the formation of new blood vessels, facilitating tumor progression. The CXCR4 ligand SDF-1/CXCL12 also promotes tumor development by stimulating angiogenesis and by favoring metastasis of CXCR4-positive tumor cells to distant organs producing SDF-1/CXCL12. Furthermore, these angiogenic chemokines also directly enhance tumor cell survival and proliferation. In contrast, the CXCR3 ligands Mig/CXCL9, IP-10/CXCL10 and I-TAC/CXCL11 are angiostatic and attract anti-tumoral T lymphocytes and may therefore mediate tumor growth retardation and regression. Thus, chemokines exert diverging, sometimes dual roles in tumor biology as described for esophageal and gastric cancer. Therefore extensive research is needed to completely unravel the complex chemokine code in specific cancers. Possibly, chemokine-targeted cancer therapy will have to be adapted to the individual's chemokine profile.
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Affiliation(s)
- Hannelien Verbeke
- Laboratory of Molecular Immunology, Rega Institute for Medical Research, University of Leuven (K.U.Leuven), Belgium
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Lack of association between gene polymorphisms of Angiotensin converting enzyme, Nod-like receptor 1, Toll-like receptor 4, FAS/FASL and the presence of Helicobacter pylori-induced premalignant gastric lesions and gastric cancer in Caucasians. BMC MEDICAL GENETICS 2011; 12:112. [PMID: 21864388 PMCID: PMC3166912 DOI: 10.1186/1471-2350-12-112] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Accepted: 08/24/2011] [Indexed: 12/16/2022]
Abstract
Background Several polymorphisms of genes involved in the immunological recognition of Helicobacter pylori and regulating apoptosis and proliferation have been linked to gastric carcinogenesis, however reported data are partially conflicting. The aim of our study was to evaluate potential associations between the presence of gastric cancer (GC) and high risk atrophic gastritis (HRAG) and polymorphisms of genes encoding Angiotensin converting enzyme (ACE), Nod-like receptor 1 (NOD1), Toll-like receptor 4 (TLR4) and FAS/FASL. Methods Gene polymorphisms were analyzed in 574 subjects (GC: n = 114; HRAG: n = 222, controls: n = 238) of Caucasian origin. ACE I/D (rs4646994), NOD1 796G>A (rs5743336), TLR4 3725G>C (rs11536889), FAS 1377G>A (rs2234767), FAS 670A>G (rs1800682) and FASL 844T>C (rs763110) were genotyped by different PCR approaches and restriction fragment length polymorphism analysis. Results Frequencies of genotypes in our study are similar to the data reported on subjects of Caucasian ethnicity. There was a tendency for NOD1 796G/G genotype to be associated with increased risk of HRAG (62.4% vs. 54.5% in controls, p = 0.082). FAS 670G/G genotype was more frequent in HRAG when compared to controls, 23.9% and 17.2% respectively, however it failed to reach significance level (p = 0.077). We did not find any significant associations for all polymorphisms in relation to GC or HRAG. NOD1 796G>A and TLR4 3725G>C gene polymorphisms were also not associated with Helicobacter pylori infection. Conclusions ACE, NOD1, TRL4 and FAS/FASL gene polymorphisms are not linked with gastric carcinogenesis in Caucasians, and therefore they should not be considered as potential biomarkers for identifying individuals with higher risk for GC.
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The Human Gastric Pathogen Helicobacter pylori and Its Association with Gastric Cancer and Ulcer Disease. ACTA ACUST UNITED AC 2011. [DOI: 10.1155/2011/340157] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
With the momentous discovery in the 1980's that a bacterium, Helicobacter pylori, can cause peptic ulcer disease and gastric cancer, antibiotic therapies and prophylactic measures have been successful, only in part, in reducing the global burden of these diseases. To date, ~700,000 deaths worldwide are still attributable annually to gastric cancer alone. Here, we review H. pylori's contribution to the epidemiology and histopathology of both gastric cancer and peptic ulcer disease. Furthermore, we examine the host-pathogen relationship and H. pylori biology in context of these diseases, focusing on strain differences, virulence factors (CagA and VacA), immune activation and the challenges posed by resistance to existing therapies. We consider also the important role of host-genetic variants, for example, in inflammatory response genes, in determining infection outcome and the role of H. pylori in other pathologies—some accepted, for example, MALT lymphoma, and others more controversial, for example, idiopathic thrombocytic purpura. More recently, intriguing suggestions that H. pylori has protective effects in GERD and autoimmune diseases, such as asthma, have gained momentum. Therefore, we consider the basis for these suggestions and discuss the potential impact for future therapeutic rationales.
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Kutikhin AG. Role of NOD1/CARD4 and NOD2/CARD15 gene polymorphisms in cancer etiology. Hum Immunol 2011; 72:955-68. [PMID: 21745515 DOI: 10.1016/j.humimm.2011.06.003] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2011] [Revised: 05/30/2011] [Accepted: 06/08/2011] [Indexed: 02/08/2023]
Abstract
NOD1/CARD4 and NOD2/CARD15 are members of Nod-like receptor family. They are located in cytosol, bind bacterial and viral ligands and play a key role in realization of innate and adaptive immune response, apoptosis, autophagy, and reactive oxygen species generation. Polymorphisms in NOD1/CARD4 and NOD2/CARD15 genes may shift balance between pro- and anti-inflammatory cytokines, modulating the risk of infection, chronic inflammation and cancer. NOD1/CARD4 and NOD2/CARD15 gene polymorphisms may be associated with altered risk of gastric, colorectal, breast, ovarian, prostate, testicular, lung, laryngeal, liver, gallbladder, biliary tract, pancreatic, small bowel, kidney, urinary bladder cancer, skin cancer, nonthyroid endocrine tumors, lymphoma and leukemia. The short list of such polymorphisms perspective for oncogenomic investigations may include rs2006847, rs2066845, rs2066844, rs2066842, ND(1)+32656, rs2075820 whereas rs104895493, rs104895476, rs104895475, rs104895474, rs104895473, rs104895472, rs104895462, rs104895461, rs104895460, rs104895438, rs5743291, rs5743260, rs2076756, rs2066843, Pro371Thr, Ala794Pro, Gln908His, rs72551113, rs72551107, rs6958571, rs2907749, rs2907748, rs2075822, rs2075819, rs2075818 may be added to the extended list. Reasons of discrepancies between different studies include confounding host genetic, bacterial, or environmental factors modulating penetrance of variant allele and affecting risk of condition increasing cancer risk, different bacterial impact in aetiology of such conditions, differences in sample size, clinicopathological characteristics, diagnostics, stratification, genotyping methods, and chance.
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Affiliation(s)
- Anton G Kutikhin
- Department of Epidemiology, Kemerovo State Medical Academy, Kemerovo, Russia.
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Innate immune sensors and gastrointestinal bacterial infections. Clin Dev Immunol 2011; 2011:579650. [PMID: 21647408 PMCID: PMC3102448 DOI: 10.1155/2011/579650] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Accepted: 03/04/2011] [Indexed: 12/13/2022]
Abstract
The gastrointestinal microbiota is a major source of immune stimulation. The interaction between host pattern-recognition receptors and conserved microbial ligands profoundly influences infection dynamics. Identifying and understanding the nature of these interactions is a key step towards obtaining a clearer picture of microbial pathogenesis. These interactions underpin a complex interplay between microbe and host that has far reaching consequences for both. Here, we review the role of pattern recognition receptors in three prototype diseases affecting the stomach, the small intestine, and large intestine, respectively (Helicobacter pylori infection, Salmonella infection, and inflammatory bowel disease). Specifically, we review the nature and impact of pathogen:receptor interactions, their impact upon pathogenesis, and address the relevance of pattern recognition receptors in the development of therapies for gastrointestinal diseases.
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Allison CC, Ferrero RL. Role of virulence factors and host cell signaling in the recognition of Helicobacter pylori and the generation of immune responses. Future Microbiol 2010; 5:1233-55. [PMID: 20722601 DOI: 10.2217/fmb.10.84] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Helicobacter pylori colonizes a large proportion of the world's population, with infection invariably leading to chronic, lifelong gastritis. While the infection often persists undiagnosed and without causing severe pathology, there are a number of host, bacterial and environmental factors that can influence whether infection provokes a mild inflammatory response or results in significant morbidity. Intriguingly, the most virulent H. pylori strains appear to deliberately induce the epithelial signaling cascades responsible for activating the innate immune system. While the reason for this remains unclear, the resulting adaptive immune responses are largely ineffective in clearing the bacterium once infection has become established and, as a result, inflammation likely causes more damage to the host itself.
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Affiliation(s)
- Cody C Allison
- Centre for Innate Immunity & Infectious Diseases, Monash Institute of Medical Research, Clayton, Australia.
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Peek RM, Fiske C, Wilson KT. Role of innate immunity in Helicobacter pylori-induced gastric malignancy. Physiol Rev 2010; 90:831-58. [PMID: 20664074 DOI: 10.1152/physrev.00039.2009] [Citation(s) in RCA: 166] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Helicobacter pylori colonizes the majority of persons worldwide, and the ensuing gastric inflammatory response is the strongest singular risk factor for peptic ulceration and gastric cancer. However, only a fraction of colonized individuals ever develop clinically significant outcomes. Disease risk is combinatorial and can be modified by bacterial factors, host responses, and/or specific interactions between host and microbe. Several H. pylori constituents that are required for colonization or virulence have been identified, and their ability to manipulate the host innate immune response will be the focus of this review. Identification of bacterial and host mediators that augment disease risk has profound ramifications for both biomedical researchers and clinicians as such findings will not only provide mechanistic insights into inflammatory carcinogenesis but may also serve to identify high-risk populations of H. pylori-infected individuals who can then be targeted for therapeutic intervention.
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Affiliation(s)
- Richard M Peek
- Division of Gastroenterology, Department of Medicine, Vanderbilt University School of Medicine, and Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee 37232-2279, USA.
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Sugimoto M, Yamaoka Y, Furuta T. Influence of interleukin polymorphisms on development of gastric cancer and peptic ulcer. World J Gastroenterol 2010; 16:1188-200. [PMID: 20222161 PMCID: PMC2839170 DOI: 10.3748/wjg.v16.i10.1188] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Pro-inflammatory cytokines are produced in the gastric mucosa by inflammatory cells activated by chronic Helicobacter pylori (H. pylori) infection. Polymorphisms of these cytokine genes are associated with individual differences in gastric mucosal cytokine mRNA level, which result in differences in gastric mucosal inflammation, acid inhibition and gastroduodenal disease risk in response to H. pylori infection. Although polymorphisms of interleukin (IL)-1B, IL-1RN and TNF-A have been reported to relate well with gastric cancer and peptic ulcer risk, those of IL-2, IL-4, IL-6 and IL-8 genes are unclear. In combined analyses using data from previous studies, we found that the risk of gastric non-cardia cancer development was significantly associated with IL-4-168 C allele (OR: 0.81, 95% CI: 0.69-1.00) and IL-4-590 T allele carrier status (0.61, 0.53-0.73), and IL-6-174 G/G genotype (2.02, 1.31-3.10). In peptic ulcer development, IL-2-330 G and IL-4-590 T allele carriers had a significantly decreased risk (0.37, 0.27-0.50 and 0.58, 0.34-0.99, respectively). Moreover, IL-2, IL-4, IL-6 and IL-8 gene genotypes prevalence differs among populations. The inflammatory cytokine gene polymorphisms (e.g. IL-4-590 and IL-6-572 for gastric cancer, and IL-4-590, IL-6-572 and IL-8-251 for peptic ulcer) have a more potent influence on development of gastroduodenal diseases in Western than East Asian populations. These cytokine gene polymorphisms, as well as those of IL-1B, IL-1RN and TNF-A, may be used to identify groups at higher risk of gastric cancer and peptic ulcer, and those suitable for their prevention by H. pylori eradication therapy in Western populations.
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Carl-McGrath S, Gräntzdörffer I, Lendeckel U, Ebert MP, Röcken C. Angiotensin II-generating enzymes, angiotensin-converting enzyme (ACE) and mast cell chymase (CMA1), in gastric inflammation may be regulated by H. pylori and associated cytokines. Pathology 2010; 41:419-27. [PMID: 19424904 DOI: 10.1080/00313020902885037] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND The local angiotensin II system (LAS) has numerous functions, including the regulation of growth and differentiation in the gastrointestinal tract. Angiotensin II (AngII) may be generated by angiotensin-I-converting enzyme (ACE) or mast cell chymase (CMA1) and plays an important role in inflammatory processes, although opinions differ as to which AngII-generating enzyme is primarily associated with AngII-mediated effects. ACE inhibitors have been shown to have a protective or healing effect on gastric ulcers and colitis in animal models, which could be related to the local expression of ACE. METHODS The localisation of ACE and CMA1 was examined immunohistochemically in Helicobacter pylori gastritis, non-H. pylori gastritis, gastric ulcers and non-lesional gastric tissues. Using real-time qRT-PCR, ACE- and CMA1-mRNA expression in gastric cell lines were examined and changes in ACE levels after exposure to H. pylori or cytokines (IL-1beta, IL-6, IL-8, TNF, TGFbeta1) were quantified. RESULTS ACE and CMA1 were not expressed in the non-lesional foveolar epithelium. Cytoplasmic staining for ACE in fundic chief cells, and apical membranous expression of ACE in the mucin-secreting cells of the antral and pyloric region was observed. ACE was found in endothelial cells of the gastric ulcer granulation tissue and CMA1 was strongly expressed in mast cells. ACE but not CMA1 was expressed in the MKN28, N87 and MKN45 gastric cell lines, and ACE mRNA expression was regulated by both H. pylori and the cytokines. CONCLUSIONS ACE in the gastric mucosa and the microvasculature of granulation tissue may represent a novel therapeutic target for the promotion of healing processes in gastritis and ulceration using ACE inhibitors or AT1R antagonists.
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The significance of E266K polymorphism in the NOD1 gene on Helicobacter Pylori infection: an effective force on pathogenesis? Clin Exp Med 2009; 10:107-12. [DOI: 10.1007/s10238-009-0077-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2009] [Accepted: 09/18/2009] [Indexed: 12/11/2022]
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Abstract
Peptic ulcer disease had a tremendous effect on morbidity and mortality until the last decades of the 20th century, when epidemiological trends started to point to an impressive fall in its incidence. Two important developments are associated with the decrease in rates of peptic ulcer disease: the discovery of effective and potent acid suppressants, and of Helicobacter pylori. With the discovery of H pylori infection, the causes, pathogenesis, and treatment of peptic ulcer disease have been rewritten. We focus on this revolution of understanding and management of peptic ulcer disease over the past 25 years. Despite substantial advances, this disease remains an important clinical problem, largely because of the increasingly widespread use of non-steroidal anti-inflammatory drugs (NSAIDs) and low-dose aspirin. We discuss the role of these agents in the causes of ulcer disease and therapeutic and preventive strategies for drug-induced ulcers. The rare but increasingly problematic H pylori-negative NSAID-negative ulcer is also examined.
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Affiliation(s)
- Peter Malfertheiner
- Department of Gastroenterology, Hepatology, and Infectious Diseases, Otto-von-Guericke University, Magdeburg, Germany.
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Associations of plasma IL-8 levels withHelicobacter pyloriseropositivity, gastric atrophy, andIL-8T-251A genotypes. Epidemiol Infect 2009; 138:512-8. [DOI: 10.1017/s0950268809990677] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
SUMMARYThere are few data on circulatory pro-inflammatory cytokine levels and cytokine gene polymorphisms inH. pylori-positive patients. A cross-sectional study was conducted to examine the effects ofH. pyloriinfection, gastric atrophy, and theIL-8T-251A polymorphism on plasma IL-8 levels in 98 Japanese adults. Seventy-one subjects were positive forH. pyloriinfection. The geometric mean of plasma IL-8 concentration was significantly higher in subjects withH. pyloriinfection than in those without (P=0·001). The development of atrophy was negatively associated with IL-8 levels in theH. pylori-positive subjects, although not significantly. Plasma IL-8 levels in the T/T genotype were associated withH. pyloriinfection and atrophy status (P=0·016). Our findings suggested that circulating IL-8 levels were associated withH. pyloriinfection. The effect ofH. pyloriinfection on plasma IL-8 levels was not clearly modified by theIL-8T-251A polymorphism.
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Geddes K, Magalhães JG, Girardin SE. Unleashing the therapeutic potential of NOD-like receptors. Nat Rev Drug Discov 2009; 8:465-79. [PMID: 19483708 DOI: 10.1038/nrd2783] [Citation(s) in RCA: 166] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Nucleotide-binding and oligomerization domain (NOD)-like receptors (NLRs) are a family of intracellular sensors that have key roles in innate immunity and inflammation. Whereas some NLRs - including NOD1, NOD2, NAIP (NLR family, apoptosis inhibitory protein) and NLRC4 - detect conserved bacterial molecular signatures within the host cytosol, other members of this family sense 'danger signals', that is, xenocompounds or molecules that when recognized alert the immune system of hazardous environments, perhaps independently of a microbial trigger. In the past few years, remarkable progress has been made towards deciphering the role and the biology of NLRs, which has shown that these innate immune sensors have pivotal roles in providing immunity to infection, adjuvanticity and inflammation. Furthermore, several inflammatory disorders have been associated with mutations in human NLRgenes. Here, we discuss the effect that research on NLRs will have on vaccination, treatment of chronic inflammatory disorders and acute bacterial infections.
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Affiliation(s)
- Kaoru Geddes
- Department of Immunology, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada
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Association of gastric disease with polymorphisms in the inflammatory-related genes IL-1B, IL-1RN, IL-10, TNF and TLR4. Eur J Gastroenterol Hepatol 2009; 21:630-5. [PMID: 19295440 PMCID: PMC2802816 DOI: 10.1097/meg.0b013e3283140eea] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVES This study aimed to investigate if single nucleotide polymorphisms (SNPs) in a series of inflammatory genes were associated with the development of the most common pathologies thought to precede gastric cancer development namely; Helicobacter pylori (H. pylori)-associated gastritis and intestinal metaplasia. METHODS A total of 250 patients were genotyped for 11 SNPs in the IL-1B, IL-1RN, TNF, TLR4 and IL-10 genes. The study population comprised H. pylori uninfected ('normal') control patients (n=96), H. pylori-positive gastritis (n=91) and intestinal metaplasia patients (n=63). Genotyping was performed using Taqman allelic discrimination assays. Odds ratios for gastric disease groups were adjusted for potential confounding factors. RESULTS No differences were identified in frequency of carriage, or homozygosity, for any of the 'risk' alleles investigated across the patient groups. No evidence was found to suggest an association with increased risk of developing either chronic gastritis or intestinal metaplasia with SNPs in the IL-1B, IL-1RN, TNF, TLR4 and IL-10 genes or haplotypes tested. CONCLUSION This study found no evidence of an association with increased risk of developing either chronic gastritis or intestinal metaplasia with the SNPs or haplotypes tested.
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Moura SB, Almeida LR, Guerra JB, Rocha GA, Camargos Rocha AM, Melo FF, Corrêa-Oliveira R, Bittencourt P, Carvalho SD, Magalhães Queiroz DM. Toll-like receptor (TLR2, TLR4 and TLR5) gene polymorphisms and Helicobacter pylori infection in children with and without duodenal ulcer. Microbes Infect 2008; 10:1477-83. [DOI: 10.1016/j.micinf.2008.08.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2008] [Revised: 08/22/2008] [Accepted: 08/27/2008] [Indexed: 12/31/2022]
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Kumpf O, Schumann RR. Genetic influence on bloodstream infections and sepsis. Int J Antimicrob Agents 2008; 32 Suppl 1:S44-50. [PMID: 18849152 DOI: 10.1016/j.ijantimicag.2008.08.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2008] [Accepted: 08/13/2008] [Indexed: 10/21/2022]
Abstract
Bloodstream infections (BSIs) are a major burden in health care today, associated with considerable morbidity, mortality and costs. They are either caused by direct influx of pathogens via devices into the blood (primary BSI) or by bacterial spillover from infected distant organs (secondary BSI). The recognition of invading microbes by sensing of conserved molecular patterns is pivotal for the host in staging an adequate immune response to eradicate the pathogen. Moreover, a balanced immune response is crucial to avoid over inflammation followed by additional damage to the host. This complex host response pattern is controlled by soluble proteins and cellular receptors, which have recently been found to contain substantial individual genetic variations. Single nucleotide polymorphisms have been shown to affect susceptibility to and the course of numerous diseases. A large number of genes and their products are involved in the host reaction to BSIs, and genetic variation in these molecules alters the frequency and course of these events. Here we summarise recent findings on genetic variations in molecules of the innate immune system and other systems as well as their connection with susceptibility to BSIs and sepsis and the way the host stages a beneficial response to infection.
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Affiliation(s)
- Oliver Kumpf
- Department for Surgery and Surgical Oncology, Charité University Medical Center, Berlin, Germany
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