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Slezakova S, Borilova Linhartova P, Bartova J, Petanova J, Kuklinek P, Fassmann A, Dusek L, Izakovicova Holla L. Gene variability in matrix metalloproteinases in patients with recurrent aphthous stomatitis. J Oral Pathol Med 2020; 49:271-277. [PMID: 31968135 DOI: 10.1111/jop.12993] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 12/22/2019] [Accepted: 01/15/2020] [Indexed: 01/05/2023]
Abstract
BACKGROUND The development of recurrent aphthous stomatitis (RAS), inflammatory disease of oral mucosa, is influenced by both environmental and genetic factors. The aim of this study was to investigate polymorphisms located in seven genes coding different types of matrix metalloproteinases (MMPs)-collagenases (MMP1, MMP8, and MMP13), gelatinases (MMP2 and MMP9), stromelysin (MMP3), and membrane-type metalloproteinase (MMP16) in patients with RAS and healthy controls. METHODS Totally, 223 subjects were included in this case-control study and their detailed anamnestic, clinical, and laboratory parameters were recorded. Seventy-seven patients with RAS and 146 controls were genotyped for seventeen polymorphisms in the MMPs genes using the real-time polymerase chain reaction (PCR) or PCR with restriction analysis. RESULTS Allele, genotype, and haplotype frequencies of the studied polymorphisms between RAS patients and controls were similar, except for allele distributions of MMP1 rs1144393, MMP9 rs3918242, and MMP16 rs10429371, which were different between patients with RAS and healthy controls (P = .023, P = .049 and P = .025, all Pcorr > 0.05, respectively). Moreover, the comparison of genotype frequencies (TT vs CC + CT) of the MMP16 rs10429371 variant showed a marginally significant difference between RAS patients and controls (P = .05, Pcorr > 0.05, OR = 1.68, 95% CI = 0.95-2.98). CONCLUSIONS No significant relationship between investigated polymorphisms in seven MMPs genes and RAS development in the Czech population was observed in this study.
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Affiliation(s)
- Simona Slezakova
- Department of Pathophysiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Petra Borilova Linhartova
- Department of Pathophysiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.,Clinic of Stomatology, Institution Shared with St. Anne's Faculty Hospital, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Jirina Bartova
- Department of Stomatology, First Faculty of Medicine, General University Hospital, Charles University, Prague, Czech Republic
| | - Jitka Petanova
- Department of Immunology and Microbiology, First Faculty of Medicine, General University Hospital, Charles University, Prague, Czech Republic
| | - Pavel Kuklinek
- Department of Clinical Immunology and Allergology, Institution Shared with St. Anne's Faculty Hospital, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Antonin Fassmann
- Clinic of Stomatology, Institution Shared with St. Anne's Faculty Hospital, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Ladislav Dusek
- Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Lydie Izakovicova Holla
- Clinic of Stomatology, Institution Shared with St. Anne's Faculty Hospital, Faculty of Medicine, Masaryk University, Brno, Czech Republic
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Ehrhardt K, Steck N, Kappelhoff R, Stein S, Rieder F, Gordon IO, Boyle EC, Braubach P, Overall CM, Finlay BB, Grassl GA. Persistent Salmonella enterica Serovar Typhimurium Infection Induces Protease Expression During Intestinal Fibrosis. Inflamm Bowel Dis 2019; 25:1629-1643. [PMID: 31066456 PMCID: PMC6749888 DOI: 10.1093/ibd/izz070] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Indexed: 12/15/2022]
Abstract
BACKGROUND Intestinal fibrosis is a common and serious complication of Crohn's disease characterized by the accumulation of fibroblasts, deposition of extracellular matrix, and formation of scar tissue. Although many factors including cytokines and proteases contribute to the development of intestinal fibrosis, the initiating mechanisms and the complex interplay between these factors remain unclear. METHODS Chronic infection of mice with Salmonella enterica serovar Typhimurium was used to induce intestinal fibrosis. A murine protease-specific CLIP-CHIP microarray analysis was employed to assess regulation of proteases and protease inhibitors. To confirm up- or downregulation during fibrosis, we performed quantitative real-time polymerase chain reaction (PCR) and immunohistochemical stainings in mouse tissue and tissue from patients with inflammatory bowel disease. In vitro infections were used to demonstrate a direct effect of bacterial infection in the regulation of proteases. RESULTS Mice develop severe and persistent intestinal fibrosis upon chronic infection with Salmonella enterica serovar Typhimurium, mimicking the pathology of human disease. Microarray analyses revealed 56 up- and 40 downregulated proteases and protease inhibitors in fibrotic cecal tissue. Various matrix metalloproteases, serine proteases, cysteine proteases, and protease inhibitors were regulated in the fibrotic tissue, 22 of which were confirmed by quantitative real-time PCR. Proteases demonstrated site-specific staining patterns in intestinal fibrotic tissue from mice and in tissue from human inflammatory bowel disease patients. Finally, we show in vitro that Salmonella infection directly induces protease expression in macrophages and epithelial cells but not in fibroblasts. CONCLUSIONS In summary, we show that chronic Salmonella infection regulates proteases and protease inhibitors during tissue fibrosis in vivo and in vitro, and therefore this model is well suited to investigating the role of proteases in intestinal fibrosis.
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Affiliation(s)
- Katrin Ehrhardt
- Institute of Medical Microbiology and Hospital Epidemiology and German Center for Infection Research (DZIF), Partner Site Hannover, Hannover Medical School, Hannover, Germany
| | - Natalie Steck
- Institute for Experimental Medicine, Christian-Albrechts University of Kiel, Kiel, Germany, and Research Center Borstel, Borstel, Germany
| | - Reinhild Kappelhoff
- Department of Oral Biological and Medical Sciences, Centre for Blood Research, Faculty of Dentistry, University of British Columbia, Vancouver, BC, Canada
| | - Stephanie Stein
- Institute for Experimental Medicine, Christian-Albrechts University of Kiel, Kiel, Germany, and Research Center Borstel, Borstel, Germany,Present affiliation: Center for Internal Medicine, I. Medical Clinic and Polyclinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Florian Rieder
- Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute
| | - Ilyssa O Gordon
- Department of Pathology, Pathology and Laboratory Medicine Institute, Cleveland Clinic Foundation, Cleveland, Ohio, USA
| | - Erin C Boyle
- Department of Cardiothoracic, Transplantation, and Vascular Surgery, Hannover Medical School, Hannover, Germany,Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Peter Braubach
- Institute for Pathology, Hannover Medical School, Hannover, Germany
| | - Christopher M Overall
- Department of Oral Biological and Medical Sciences, Centre for Blood Research, Faculty of Dentistry, University of British Columbia, Vancouver, BC, Canada
| | - B Brett Finlay
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
| | - Guntram A Grassl
- Institute of Medical Microbiology and Hospital Epidemiology and German Center for Infection Research (DZIF), Partner Site Hannover, Hannover Medical School, Hannover, Germany,Address correspondence to: Guntram A. Grassl, PhD, Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany ()
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Matrix Metalloproteinases in Non-Neoplastic Disorders. Int J Mol Sci 2016; 17:ijms17071178. [PMID: 27455234 PMCID: PMC4964549 DOI: 10.3390/ijms17071178] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 06/16/2016] [Accepted: 07/04/2016] [Indexed: 12/23/2022] Open
Abstract
The matrix metalloproteinases (MMPs) are zinc-dependent endopeptidases belonging to the metzincin superfamily. There are at least 23 members of MMPs ever reported in human, and they and their substrates are widely expressed in many tissues. Recent growing evidence has established that MMP not only can degrade a variety of components of extracellular matrix, but also can cleave and activate various non-matrix proteins, including cytokines, chemokines and growth factors, contributing to both physiological and pathological processes. In normal conditions, MMP expression and activity are tightly regulated via interactions between their activators and inhibitors. Imbalance among these factors, however, results in dysregulated MMP activity, which causes tissue destruction and functional alteration or local inflammation, leading to the development of diverse diseases, such as cardiovascular disease, arthritis, neurodegenerative disease, as well as cancer. This article focuses on the accumulated evidence supporting a wide range of roles of MMPs in various non-neoplastic diseases and provides an outlook on the therapeutic potential of inhibiting MMP action.
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de Bruyn M, Vandooren J, Ugarte-Berzal E, Arijs I, Vermeire S, Opdenakker G. The molecular biology of matrix metalloproteinases and tissue inhibitors of metalloproteinases in inflammatory bowel diseases. Crit Rev Biochem Mol Biol 2016; 51:295-358. [DOI: 10.1080/10409238.2016.1199535] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Cleynen I, Jüni P, Bekkering GE, Nüesch E, Mendes CT, Schmied S, Wyder S, Kellen E, Villiger PM, Rutgeerts P, Vermeire S, Lottaz D. Genetic evidence supporting the association of protease and protease inhibitor genes with inflammatory bowel disease: a systematic review. PLoS One 2011; 6:e24106. [PMID: 21931648 PMCID: PMC3169567 DOI: 10.1371/journal.pone.0024106] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Accepted: 08/04/2011] [Indexed: 12/11/2022] Open
Abstract
As part of the European research consortium IBDase, we addressed the role of proteases and protease inhibitors (P/PIs) in inflammatory bowel disease (IBD), characterized by chronic mucosal inflammation of the gastrointestinal tract, which affects 2.2 million people in Europe and 1.4 million people in North America. We systematically reviewed all published genetic studies on populations of European ancestry (67 studies on Crohn's disease [CD] and 37 studies on ulcerative colitis [UC]) to identify critical genomic regions associated with IBD. We developed a computer algorithm to map the 807 P/PI genes with exact genomic locations listed in the MEROPS database of peptidases onto these critical regions and to rank P/PI genes according to the accumulated evidence for their association with CD and UC. 82 P/PI genes (75 coding for proteases and 7 coding for protease inhibitors) were retained for CD based on the accumulated evidence. The cylindromatosis/turban tumor syndrome gene (CYLD) on chromosome 16 ranked highest, followed by acylaminoacyl-peptidase (APEH), dystroglycan (DAG1), macrophage-stimulating protein (MST1) and ubiquitin-specific peptidase 4 (USP4), all located on chromosome 3. For UC, 18 P/PI genes were retained (14 proteases and 4 protease inhibitors), with a considerably lower amount of accumulated evidence. The ranking of P/PI genes as established in this systematic review is currently used to guide validation studies of candidate P/PI genes, and their functional characterization in interdisciplinary mechanistic studies in vitro and in vivo as part of IBDase. The approach used here overcomes some of the problems encountered when subjectively selecting genes for further evaluation and could be applied to any complex disease and gene family.
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Affiliation(s)
- Isabelle Cleynen
- Department of Gastroenterology, Catholic University Leuven, Leuven, Belgium
| | - Peter Jüni
- Clinical Trials Unit Bern, Bern University Hospital, Bern, Switzerland
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | | | - Eveline Nüesch
- Clinical Trials Unit Bern, Bern University Hospital, Bern, Switzerland
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Camila T. Mendes
- Department of Rheumatology, Clinical Immunology and Allergology, University Hospital of Bern, Bern, Switzerland
| | - Stefanie Schmied
- Clinical Trials Unit Bern, Bern University Hospital, Bern, Switzerland
| | - Stefan Wyder
- Department of Rheumatology, Clinical Immunology and Allergology, University Hospital of Bern, Bern, Switzerland
| | - Eliane Kellen
- Leuven Centre for Cancer Prevention, University Hospital Leuven, Leuven, Belgium
| | - Peter M. Villiger
- Department of Rheumatology, Clinical Immunology and Allergology, University Hospital of Bern, Bern, Switzerland
| | - Paul Rutgeerts
- Department of Gastroenterology, Catholic University Leuven, Leuven, Belgium
| | - Séverine Vermeire
- Department of Gastroenterology, Catholic University Leuven, Leuven, Belgium
| | - Daniel Lottaz
- Department of Rheumatology, Clinical Immunology and Allergology, University Hospital of Bern, Bern, Switzerland
- * E-mail:
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Genetic variations in matrix metalloproteinases may be associated with increased risk of ulcerative colitis. Hum Immunol 2011; 72:1117-27. [PMID: 21925226 DOI: 10.1016/j.humimm.2011.08.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 08/12/2011] [Accepted: 08/26/2011] [Indexed: 02/04/2023]
Abstract
Increased production of matrix metalloproteinases (MMPs) plays an important role in tissue damage in inflammatory bowel disease (IBD). Genetically encoded variation between individuals in MMP production may therefore contribute to disease onset, type, or severity. We undertook an extensive candidate gene single nucleotide polymorphism (SNP) study of MMP-1, -2, -3, -7, -8, -9, -10, -12, -13, and -14 and tissue inhibitor of metalloproteinases (TIMPs)-1, -3, and -4 in ulcerative colitis (UC). We identified tagging SNPs across these genes, and genotyped these SNPs in a Caucasian New Zealand dataset consisting of 419 UC patients and 907 controls. SNPs in a number of MMP genes were associated with UC. After correcting for multiple testing SNPs in MMP-3, MMP-8, MMP-10, and MMP-14 remained significant in their associations with UC. In a second study, using samples from a Dutch cohort, most of the significant findings in the New Zealand cohort were not replicated. However, data from an international meta-analysis provide some support for the initial findings. In conclusion, this study provides preliminary evidence to suggest that genetic variation in the MMPs may play a role in interindividual differences in UC susceptibility and clinical outcome. Further studies are needed in other cohorts to determine the robustness of these observations in different populations.
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Couillard J, Estève PO, Pradhan S, St-Pierre Y. 5-Aza-2′-deoxycytidine and interleukin-1 cooperate to regulate matrix metalloproteinase-3 gene expression. Int J Cancer 2011; 129:2083-92. [DOI: 10.1002/ijc.25865] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Accepted: 11/30/2010] [Indexed: 12/31/2022]
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Meijer MJ, Mieremet-Ooms MAC, Sier CFM, van Hogezand RA, Lamers CBHW, Hommes DW, Verspaget HW. Matrix metalloproteinases and their tissue inhibitors as prognostic indicators for diagnostic and surgical recurrence in Crohn's disease. Inflamm Bowel Dis 2009; 15:84-92. [PMID: 18634035 DOI: 10.1002/ibd.20581] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Recurrence of disease after surgically induced remission constitutes a major and largely unpredictable problem in Crohn's disease (CD). Matrix metalloproteinases (MMP) and the tissue inhibitors of metalloproteinases (TIMP) are involved in the (etio)pathogenesis of CD and may thereby also affect postsurgical outcome. We studied the predictive value of 1) allelic composition at MMP, TIMP, and TNF-alpha single nucleotide polymorphism loci, and 2) MMP and TIMP intestinal protein levels relative to important clinical variables for recurrence of CD after resection of diseased bowel. METHODS From 87 CD patients with a full medical record, surgically resected tissue was homogenized and analyzed for single nucleotide polymorphism (SNP) genotype and MMP-TIMP protein levels. The prognostic value of these parameters was determined using the uni- and multivariate Cox proportional hazards analyses. RESULTS The T allele at TIMP-1 SNP +372 T/C was found to be associated with an increased risk for surgical recurrence. Higher levels of TIMP-1, TIMP-2, and MMP-9 in noninflamed CD tissue, but not in inflamed tissue, and negative smoking status independently protected against diagnostic and/or surgical recurrence. CONCLUSIONS The TIMP-1 SNP +372 T allele with an increased risk of recurrence is in line with our previous results demonstrating increased CD susceptibility and low TIMP-1 protein expression associated with this allele. High TIMP and MMP-9 levels in noninflamed tissue are predictive of a favorable disease recurrence in CD. The contribution of MMP-9 and TIMPs to disease recurrence appears not to be mediated by smoking status, since no correlation with this parameter could be demonstrated.
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Affiliation(s)
- Martin J Meijer
- LUMC, Department of Gastroenterology-Hepatology, Leiden, The Netherlands
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Meijer MJW, Mieremet-Ooms MAC, van Hogezand RA, Lamers CBHW, Hommes DW, Verspaget HW. Role of matrix metalloproteinase, tissue inhibitor of metalloproteinase and tumor necrosis factor-α single nucleotide gene polymorphisms in inflammatory bowel disease. World J Gastroenterol 2007; 13:2960-6. [PMID: 17589947 PMCID: PMC4171149 DOI: 10.3748/wjg.v13.i21.2960] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To study the (functional) relevance of single nucleotide polymorphisms (SNPs) in genes encoding matrix metalloproteinases (MMP)-1, -2, -3, -9, tissue inhibitors of metalloproteinases (TIMP)-1, -2 and tumor necrosis factor (TNF)-α in the etiopathogenesis of inflammatory bowel diseases (IBD), that may enhance susceptibility and/or disease severity.
METHODS: Genomic DNA from 134 Crohn’s disease (CD), 111 ulcerative colitis (UC) patients and 248 control subjects was isolated from resected intestinal tissue or blood. Allelic composition at SNP loci was determined by PCR-RFLP or tetra primer ARMS PCR.
RESULTS: The TIMP-1 genotype TT in women and T in men at SNP +372 T/C was found to increase CD susceptibility (39% vs 23.8%, P = 0.018 and 67.9% vs 51.6%, P = 0.055, respectively), while women with this genotype were less prone to development of fistulae during follow-up (41.4% vs 68.3%, P = 0.025). Male IBD or CD patients carrying the TIMP-1 +372 T-allele expressed lower levels of TIMP-1 in surgically resected macroscopically inflamed tissue (0.065 < P < 0.01). The 5T5T genotype at MMP-3 SNP -1613 5T/6T increased the chance of stenotic complications in CD during follow-up (91.2% vs 71.8%, P = 0.022) but seemed to protect against colonic involvement of this disease at first endoscopic/radiologic examination (35.3% vs 59.5%, P = 0.017).
CONCLUSION: Allelic composition at the examined SNPs in genes coding for TIMP-1 and MMP-3 affect CD susceptibility and/or phenotype, i.e., fistulizing disease, stricture pathogenesis and first disease localisation. These findings reinforce the important role of these proteins in IBD.
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Affiliation(s)
- Martin J W Meijer
- Department of Gastroenterology and Hepatology, Leiden University Medical Center, Leiden, The Netherlands
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Abstract
Matrix metalloproteinases (MMPs) are a family of Zn(2+)-dependent extracellular matrix (ECM) degrading endopeptidases that share common functional domains, activation mechanisms, and collectively have the capacity to degrade all types of ECM proteins. In addition to playing a central role in ECM turnover, MMPs proteolytically activate or degrade a variety of nonmatrix substrates including chemokines, cytokines, growth factors, and junctional proteins. Thus, they are increasingly recognized as critical players in inflammatory response. Indeed, accumulating data from several studies indicate that they are the predominant proteases involved in the pathogenesis of inflammatory bowel disease (IBD) via their influence on the function and migration of inflammatory cells, mucosal ulceration, as well as matrix deposition and degradation. Some MMPs are constitutively expressed and play a protective role in IBD through their effect on cellular homeostasis, while others are induced during inflammation-mediated tissue damage. This article focuses on the role of the various MMPs in IBD, discussing their physiologic and pathogenetic role in the context of intestinal defense, mucosal inflammatory response, and immune cell-epithelial interaction.
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Affiliation(s)
- Anupama Ravi
- Division of Digestive Diseases, Department of Medicine, Emory University, Atlanta, Georgia, USA
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Medina C, Radomski MW. Role of matrix metalloproteinases in intestinal inflammation. J Pharmacol Exp Ther 2006; 318:933-8. [PMID: 16644899 DOI: 10.1124/jpet.106.103465] [Citation(s) in RCA: 155] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Matrix metalloproteinases (MMPs) and their endogenous inhibitors, tissue inhibitors of MMPs (TIMPs), are produced in the gastrointestinal tract by several structural cells. The balance between MMPs and TIMPs is essential for many physiological processes in the gut. However, imbalance between MMPs and TIMPs plays an important role in the pathophysiology of diverse intestinal inflammatory conditions. We reviewed the role of the MMP/TIMP system in the pathogenesis of intestinal inflammatory diseases and pharmacologic perspectives for the use of compounds that restore the MMP/TIMP balance.
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Affiliation(s)
- Carlos Medina
- School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland
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Hellmig S, Ott S, Rosenstiel P, Robert Fölsch U, Hampe J, Schreiber S. Genetic variants in matrix metalloproteinase genes are associated with development of gastric ulcer in H. Pylori infection. Am J Gastroenterol 2006; 101:29-35. [PMID: 16405530 DOI: 10.1111/j.1572-0241.2005.00348.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS Matrix metalloproteinases (MMPs) are a family of enzymes that degrade most of the macromolecules making up the extracellular matrix. H. pylori infection increases the secretion of MMPs in the gastric mucosa leading to severe mucosal damage. The aim of this study was to investigate if genetic variants in MMPs involved in the inflammatory response to H. pylori could predispose patients with chronic H. pylori infection to develop gastric ulcer disease. METHODS A total of 599 H. pylori-infected patients undergoing gastroscopy were genotyped for 20 SNPs covering the MMP-1, -3, -7, and -9 genes by TaqMan technology. Haplotype and single marker analysis was conducted to assess associations with gastric ulcer disease. RESULTS Carriage of allele G of the functional promoter variant MMP-7-181 was significantly associated with gastric ulcer conferring a 1.6-fold increased risk (95% CI: 1.0-2.6, p = 0.037). In addition, carriage of allele A of a coding SNP in exon 6 of MMP-9 confers a 2.4-fold increased risk (95% CI: 1.0-2.6, p = 0.013) for gastric ulcer. CONCLUSION The level of association found in this study is in agreement with the nature of a complex genetic disease. Genetic variations in the MMP-7 and -9 gene may be part of a complex genetic risk profile to develop gastric ulcer in chronic H. pylori infection. Further studies are warranted to elucidate the pathophysiological role of these genes in ulcerogenesis.
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Affiliation(s)
- Stephan Hellmig
- Department of General Internal Medicine, University Hospital of Schleswig-Holstein, Campus Kiel, Germany
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