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Shang L, Deng D, Krom BP, Gibbs S. Oral host-microbe interactions investigated in 3D organotypic models. Crit Rev Microbiol 2024; 50:397-416. [PMID: 37166371 DOI: 10.1080/1040841x.2023.2211665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 04/30/2023] [Accepted: 05/02/2023] [Indexed: 05/12/2023]
Abstract
The oral cavity is inhabited by abundant microbes which continuously interact with the host and influence the host's health. Such host-microbe interactions (HMI) are dynamic and complex processes involving e.g. oral tissues, microbial communities and saliva. Due to difficulties in mimicking the in vivo complexity, it is still unclear how exactly HMI influence the transition between healthy status and disease conditions in the oral cavity. As an advanced approach, three-dimensional (3D) organotypic oral tissues (epithelium and mucosa/gingiva) are being increasingly used to study underlying mechanisms. These in vitro models were designed with different complexity depending on the research questions to be answered. In this review, we summarised the existing 3D oral HMI models, comparing designs and readouts, discussing applications as well as future perspectives.
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Affiliation(s)
- Lin Shang
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Dongmei Deng
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Bastiaan P Krom
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Susan Gibbs
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
- Department of Molecular Cell Biology and Immunology, Amsterdam Infection and Immunity Institute, Amsterdam UMC location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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Okolo O, Honzel E, Britton WR, Yu VX, Flashner S, Martin C, Nakagawa H, Parikh AS. Experimental Modeling of Host-Bacterial Interactions in Head and Neck Squamous Cell Carcinoma. Cancers (Basel) 2023; 15:5810. [PMID: 38136355 PMCID: PMC10742111 DOI: 10.3390/cancers15245810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023] Open
Abstract
The microscopic species colonizing the human body, collectively referred to as the microbiome, play a crucial role in the maintenance of tissue homeostasis, immunity, and the development of disease. There is evidence to suggest associations between alterations in the microbiome and the development of head and neck squamous cell carcinomas (HNSCC). The use of two-dimensional (2D) modeling systems has made significant strides in uncovering the role of microbes in carcinogenesis; however, direct mechanistic links remain in their infancy. Patient-derived three-dimensional (3D) HNSCC organoid and organotypic models have recently been described. Compared to 2D models, 3D organoid culture systems effectively capture the genetic and epigenetic features of parent tissue in a patient-specific manner and may offer a more nuanced understanding of the role of host-microbe responses in carcinogenesis. This review provides a topical literature review assessing the current state of the field investigating the role of the microbiome in HNSCC; including in vivo and in vitro modeling methods that may be used to characterize microbiome-epithelial interactions.
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Affiliation(s)
- Ogoegbunam Okolo
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY 10027, USA; (O.O.); (W.R.B.); (V.X.Y.); (S.F.); (C.M.); (H.N.)
- Columbia Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10027, USA;
| | - Emily Honzel
- Columbia Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10027, USA;
| | - William R. Britton
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY 10027, USA; (O.O.); (W.R.B.); (V.X.Y.); (S.F.); (C.M.); (H.N.)
- Columbia Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10027, USA;
| | - Victoria X. Yu
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY 10027, USA; (O.O.); (W.R.B.); (V.X.Y.); (S.F.); (C.M.); (H.N.)
- Department of Otolaryngology-Head and Neck Surgery, Columbia University, New York, NY 10027, USA
| | - Samuel Flashner
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY 10027, USA; (O.O.); (W.R.B.); (V.X.Y.); (S.F.); (C.M.); (H.N.)
| | - Cecilia Martin
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY 10027, USA; (O.O.); (W.R.B.); (V.X.Y.); (S.F.); (C.M.); (H.N.)
- Organoid and Cell Culture Core, Columbia University Digestive and Liver Diseases Research Center, Columbia University, New York, NY 10027, USA
- Division of Digestive and Liver Diseases, Department of Medicine, Columbia University, New York, NY 10027, USA
| | - Hiroshi Nakagawa
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY 10027, USA; (O.O.); (W.R.B.); (V.X.Y.); (S.F.); (C.M.); (H.N.)
- Organoid and Cell Culture Core, Columbia University Digestive and Liver Diseases Research Center, Columbia University, New York, NY 10027, USA
- Division of Digestive and Liver Diseases, Department of Medicine, Columbia University, New York, NY 10027, USA
| | - Anuraag S. Parikh
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY 10027, USA; (O.O.); (W.R.B.); (V.X.Y.); (S.F.); (C.M.); (H.N.)
- Department of Otolaryngology-Head and Neck Surgery, Columbia University, New York, NY 10027, USA
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3
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Chen WA, Dou Y, Fletcher HM, Boskovic DS. Local and Systemic Effects of Porphyromonas gingivalis Infection. Microorganisms 2023; 11:470. [PMID: 36838435 PMCID: PMC9963840 DOI: 10.3390/microorganisms11020470] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/31/2023] [Accepted: 02/02/2023] [Indexed: 02/16/2023] Open
Abstract
Porphyromonas gingivalis, a gram-negative anaerobe, is a leading etiological agent in periodontitis. This infectious pathogen can induce a dysbiotic, proinflammatory state within the oral cavity by disrupting commensal interactions between the host and oral microbiota. It is advantageous for P. gingivalis to avoid complete host immunosuppression, as inflammation-induced tissue damage provides essential nutrients necessary for robust bacterial proliferation. In this context, P. gingivalis can gain access to the systemic circulation, where it can promote a prothrombotic state. P. gingivalis expresses a number of virulence factors, which aid this pathogen toward infection of a variety of host cells, evasion of detection by the host immune system, subversion of the host immune responses, and activation of several humoral and cellular hemostatic factors.
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Affiliation(s)
- William A Chen
- Division of Biochemistry, Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - Yuetan Dou
- Division of Microbiology and Molecular Genetics, Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - Hansel M Fletcher
- Division of Microbiology and Molecular Genetics, Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - Danilo S Boskovic
- Division of Biochemistry, Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
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Lithgow KV, Buchholz VCH, Ku E, Konschuh S, D'Aubeterre A, Sycuro LK. Protease activities of vaginal Porphyromonas species disrupt coagulation and extracellular matrix in the cervicovaginal niche. NPJ Biofilms Microbiomes 2022; 8:8. [PMID: 35190575 PMCID: PMC8861167 DOI: 10.1038/s41522-022-00270-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 01/14/2022] [Indexed: 12/14/2022] Open
Abstract
Porphyromonas asaccharolytica and Porphyromonas uenonis are common inhabitants of the vaginal microbiome, but their presence has been linked to adverse health outcomes for women, including bacterial vaginosis and preterm birth. However, little is known about the pathogenesis mechanisms of these bacteria. The related oral opportunistic pathogen, Porphyromonas gingivalis, is comparatively well-studied and known to secrete numerous extracellular matrix-targeting proteases. Among these are the gingipain family of cysteine proteases that drive periodontal disease progression and hematogenic transmission to the placenta. In this study, we demonstrate that vaginal Porphyromonas species secrete broad-acting proteases capable of freely diffusing within the cervicovaginal niche. These proteases degrade collagens that are enriched within the cervix (type I) and chorioamniotic membranes (type IV), as well as fibrinogen, which inhibits clot formation. Bioinformatic queries confirmed the absence of gingipain orthologs and identified five serine, cysteine, and metalloprotease candidates in each species. Inhibition assays revealed that each species' proteolytic activity can be partially attributed to a secreted metalloprotease with broad substrate specificity that is distantly related to the P. gingivalis endopeptidase PepO. This characterization of virulence activities in vaginal Porphyromonas species highlights their potential to alter the homeostasis of reproductive tissues and harm human pregnancy through clotting disruption, fetal membrane weakening, and premature cervical remodeling.
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Affiliation(s)
- Karen V Lithgow
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada
| | - Vienna C H Buchholz
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada
- Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Emily Ku
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada
| | - Shaelen Konschuh
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada
| | - Ana D'Aubeterre
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada
| | - Laura K Sycuro
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada.
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada.
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada.
- International Microbiome Centre, University of Calgary, Calgary, AB, Canada.
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5
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Chang SH, Park SH, Cho ML, Choi Y. Why Should We Consider Potential Roles of Oral Bacteria in the Pathogenesis of Sjögren Syndrome? Immune Netw 2022; 22:e32. [PMID: 36081525 PMCID: PMC9433196 DOI: 10.4110/in.2022.22.e32] [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: 04/23/2022] [Revised: 06/16/2022] [Accepted: 06/22/2022] [Indexed: 12/01/2022] Open
Abstract
Sjögren syndrome (SS) is a chronic autoimmune disorder that primarily targets the salivary and lacrimal glands. The pathology of these exocrine glands is characterized by periductal focal lymphocytic infiltrates, and both T cell-mediated tissue injury and autoantibodies that interfere with the secretion process underlie glandular hypofunction. In addition to these adaptive mechanisms, multiple innate immune pathways are dysregulated, particularly in the salivary gland epithelium. Our understanding of the pathogenetic mechanisms of SS has substantially improved during the past decade. In contrast to viral infection, bacterial infection has never been considered in the pathogenesis of SS. In this review, oral dysbiosis associated with SS and evidence for bacterial infection of the salivary glands in SS were reviewed. In addition, the potential contributions of bacterial infection to innate activation of ductal epithelial cells, plasmacytoid dendritic cells, and B cells and to the breach of tolerance via bystander activation of autoreactive T cells and molecular mimicry were discussed. The added roles of bacteria may extend our understanding of the pathogenetic mechanisms and therapeutic approaches for this autoimmune exocrinopathy.
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Affiliation(s)
- Sung-Ho Chang
- Department of Immunology and Molecular Microbiology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Korea
| | - Sung-Hwan Park
- Divison of Rheumatology, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Mi-La Cho
- Department of Medical Life Science, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Youngnim Choi
- Department of Immunology and Molecular Microbiology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Korea
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6
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Stähli A, Schatt ASJ, Stoffel M, Nietzsche S, Sculean A, Gruber R, Cvikl B, Eick S. Effect of scaling on the invasion of oral microorganisms into dentinal tubules including the response of pulpal cells-an in vitro study. Clin Oral Investig 2020; 25:769-777. [PMID: 33274409 PMCID: PMC7820079 DOI: 10.1007/s00784-020-03705-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Accepted: 11/24/2020] [Indexed: 11/29/2022]
Abstract
Objectives To investigate how scaling affects the penetration of microorganisms into dentinal tubules, how pulpal cells seeded into the pulp cavity respond to bacterial challenge, and how penetration and inflammatory response may depend on the bacterial composition. Materials and methods Root canals of 102 extracted human teeth underwent shaping and cleaning. Half of the teeth were subjected to scaling and root planing, the other half remained untreated. Teeth were exposed to either Streptococcus gordonii and Actinomyces oris or S. gordonii and Porphyromonas gingivalis for 10 weeks. Bacterial invasion was assessed in a depth of 1 mm to the root surface. Human pulpal cells were seeded into the cavities to assess the expression of interleukin-8 (IL-8), monocyte chemoattractant protein-1 (MCP-1), and matrix metalloproteinase-3 (MMP-3) by real-time polymerase chain reaction and immunoassay. Results The percentage of teeth with bacteria detected in dentine was higher when teeth received scaling than when they were untreated: 66.6% versus 44.4% when exposed to A. oris/S. gordonii, and 50% versus 25% when exposed to P. gingivalis/S. gordonii (p = 0.043). Scaling had no impact on IL-8 and MMP-3 expression in pulpal cells. P. gingivalis/S. gordonii caused higher levels of IL-8, MCP-1, and MMP-3 than A. oris/S. gordonii (p = 0.003, p = 0.011, p = 0.037). Conclusion Scaling supports the penetration of bacteria into the dentine of extracted human teeth. P. gingivalis may affect the immune response in pulpal cells. Clinical relevance Root surface debridement with hand instruments may facilitate bacterial penetration. Other kinds of mechanical instrumentation in this experimental setting should be investigated.
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Affiliation(s)
- Alexandra Stähli
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland.
| | - Alex S J Schatt
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland
| | - Miro Stoffel
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland
| | - Sandor Nietzsche
- Center of Electron Microscopy, University Hospital Jena, Jena, Germany
| | - Anton Sculean
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland
| | - Reinhard Gruber
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland.,Department of Oral Biology, School of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Barbara Cvikl
- Department of Conservative Dentistry, Sigmund Freud University, Vienna, Austria
| | - Sigrun Eick
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland
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Tabatabaei F, Moharamzadeh K, Tayebi L. Three-Dimensional In Vitro Oral Mucosa Models of Fungal and Bacterial Infections. TISSUE ENGINEERING PART B-REVIEWS 2020; 26:443-460. [PMID: 32131719 DOI: 10.1089/ten.teb.2020.0016] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Oral mucosa is the target tissue for many microorganisms involved in periodontitis and other infectious diseases affecting the oral cavity. Three-dimensional (3D) in vitro and ex vivo oral mucosa equivalents have been used for oral disease modeling and investigation of the mechanisms of oral bacterial and fungal infections. This review was conducted to analyze different studies using 3D oral mucosa models for the evaluation of the interactions of different microorganisms with oral mucosa. In this study, based on our inclusion criteria, 43 articles were selected and analyzed. Different types of 3D oral mucosa models of bacterial and fungal infections were discussed in terms of the biological system used, culture conditions, method of infection, and the biological endpoints assessed in each study. The critical analysis revealed some contradictory reports in this field of research in the literature. Challenges in recovering bacteria from oral mucosa models were further discussed, suggesting possible future directions in microbiomics, including the use of oral mucosa-on-a-chip. The potential use of these 3D tissue models for the evaluation of the effects of antiseptic agents on bacteria and oral mucosa was also addressed. This review concluded that there were many aspects that would require optimization and standardization with regard to using oral mucosal models for infection by microorganisms. Using new technologies-such as microfluidics and bioreactors-could help to reproduce some of the physiologically relevant conditions and further simulate the clinical situation. Impact statement Tissue-engineered or commercial models of the oral mucosa are very useful for the study of diseases that involve the interaction of microorganisms and oral epithelium. In this review, challenges in recovering bacteria from oral mucosa models, the potential use of these three-dimensional tissue models for the evaluation of the effects of antiseptic agents, and future directions in microbiomics are discussed.
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Affiliation(s)
- Fahimeh Tabatabaei
- School of Dentistry, Marquette University, Milwaukee, Wisconsin.,Department of Dental Biomaterials, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Keyvan Moharamzadeh
- School of Clinical Dentistry, University of Sheffield, Sheffield, United Kingdom
| | - Lobat Tayebi
- School of Dentistry, Marquette University, Milwaukee, Wisconsin
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8
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Hoppe T, Kraus D, Probstmeier R, Jepsen S, Winter J. Stimulation with Porphyromonas gingivalis enhances malignancy and initiates anoikis resistance in immortalized oral keratinocytes. J Cell Physiol 2019; 234:21903-21914. [PMID: 31026063 DOI: 10.1002/jcp.28754] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 04/01/2019] [Accepted: 04/11/2019] [Indexed: 12/13/2022]
Abstract
The aim of this study was to get new insights into molecular processes involved in tumor propagation of immortalized oral keratinocytes induced by the keystone pathogen Porphyromonas gingivalis. Cell culture experiments with immortalized OKF6 cells were performed to analyze cellular effects caused by bacterial stimulation focusing on altered gene expression, signaling pathways, proliferation rate, cell viability, migration and invasion behavior, and on the development of antiapoptotic pathways. Gene and protein expression were analyzed using real-time polymerase chain reaction, enzyme-linked immunosorbent assay, western blot, and protein arrays. Trypan blue staining was used to analyze proliferation and viability, transwell assays for cellular migration, Matrigel assays for invasion, and anoikis-assays for evaluating anoikis resistance. Stimulation of OKF6 cells with Porphyromonas gingivalis led to an alteration in the molecular repertoire of proteins which are involved in cell proliferation, epithelial-mesenchymal transition, stem cell formation, migration, invasion, and anoikis resistance. Higher proliferation rates were detected in conjunction with an activation of PI3K/Akt signaling and the mTOR-pathway. Additionally, inhibition of glycogen-synthase-kinase3-β led to stabilization of β-catenin and Snail, which resulted in a switch from predominant E-cadherin to N-cadherin expression and increased expression of the stem cell markers Oct3/4, Sox2, and Nanog. Enhanced biosynthesis and enzyme activity of matrix metalloproteinase-9 was accompanied by elevated invasion behavior. Finally, anoikis resistance was detected in stimulated keratinocytes by decreased apoptosis of nonadherent cells and elevated expression of epidermal growth factor receptor and c-Met. Hence, Porphyromonas gingivalis is able to induce a more aggressive tumor-like phenotype in immortalized oral keratinocytes, thus contributing to enhanced tumor features.
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Affiliation(s)
- T Hoppe
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - D Kraus
- Department of Prosthodontics, Preclinical Education, and Material Sciences, University of Bonn, Bonn, Germany
| | - R Probstmeier
- Department of Nuclear Medicine, Neuro- and Tumor Cell Biology Group, University Hospital Bonn, University of Bonn, Bonn, Germany
| | - S Jepsen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - J Winter
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
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9
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Park HJ, Salem M, Semlali A, Leung KP, Rouabhia M. Antimicrobial peptide KSL-W promotes gingival fibroblast healing properties in vitro. Peptides 2017; 93:33-43. [PMID: 28499840 DOI: 10.1016/j.peptides.2017.05.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 05/01/2017] [Accepted: 05/06/2017] [Indexed: 12/14/2022]
Abstract
We investigated the effect of synthetic antimicrobial decapeptide KSL-W (KKVVFWVKFK) on normal human gingival fibroblast growth, migration, collagen gel contraction, and α-smooth muscle actin protein expression. Results show that in addition to promoting fibroblast adhesion by increasing F-actin production, peptide KSL-W promoted cell growth by increasing the S and G2/M cell cycle phases, and enhanced the secretion of metalloproteinase (MMP)-1 and MMP-2 by upregulating MMP inhibitors, such as tissue inhibitors of metalloproteinase (TIMP)-1 and TIMP-2 in fibroblasts. An in vitro wound healing assay confirmed that peptide KSL-W promoted fibroblast migration and contraction of a collagen gel matrix. We also demonstrated a high expression of α-smooth muscle actin by gingival fibroblasts being exposed to KSL-W. This work shows that peptide KSL-W enhances gingival fibroblast growth, migration, and metalloproteinase secretion, and the expression of α-smooth muscle actin, thus promoting wound healing.
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Affiliation(s)
- Hyun-Jin Park
- Groupe de Recherche en Écologie Buccale, Faculté de Médecine Dentaire, Université Laval, Québec, QC, Canada
| | - Mabrouka Salem
- Groupe de Recherche en Écologie Buccale, Faculté de Médecine Dentaire, Université Laval, Québec, QC, Canada
| | - Abdelhabib Semlali
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Kai P Leung
- Dental and Craniofacial Trauma Research and Tissue Regeneration Directorate, US Army Institute of Surgical Research, Joint Base Fort Sam Houston, TX 78234-6315, USA
| | - Mahmoud Rouabhia
- Groupe de Recherche en Écologie Buccale, Faculté de Médecine Dentaire, Université Laval, Québec, QC, Canada.
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10
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Toll-like receptor-2 has a critical role in periodontal pathogen-induced myocardial fibrosis in the pressure-overloaded murine hearts. Hypertens Res 2016; 40:110-116. [DOI: 10.1038/hr.2016.117] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 07/13/2016] [Accepted: 07/21/2016] [Indexed: 12/15/2022]
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11
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Abstract
As our knowledge of host-microbial interactions within the oral cavity increases, future treatments are likely to be more targeted. For example, efforts to target a single species or key virulence factors that they produce, while maintaining the natural balance of the resident oral microbiota that acts to modulate the host immune response would be an advantage. Targeted approaches may be directed at the black-pigmented anaerobes, Porphyromonas gingivalis and Prevotella intermedia, associated with periodontitis. Such pigments provide an opportunity for targeted phototherapy with high-intensity monochromatic light. Functional inhibition approaches, including the use of enzyme inhibitors, are also being explored to control periodontitis. More general disruption of dental plaque through the use of enzymes and detergents, alone and in combination, shows much promise. The use of probiotics and prebiotics to improve gastrointestinal health has now led to an interest in using these approaches to control oral disease. More recently the potential of antimicrobial peptides and nanotechnology, through the application of nanoparticles with biocidal, anti-adhesive and delivery capabilities, has been explored. The aim of this review is to consider the current status as regards non-conventional treatment approaches for oral infections with particular emphasis on the plaque-related diseases.
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Affiliation(s)
- Robert P Allaker
- a Oral Microbiology; Barts and The London School of Medicine & Dentistry; Queen Mary University of London ; London, UK
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12
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Gao S, Li S, Ma Z, Liang S, Shan T, Zhang M, Zhu X, Zhang P, Liu G, Zhou F, Yuan X, Jia R, Potempa J, Scott DA, Lamont RJ, Wang H, Feng X. Presence of Porphyromonas gingivalis in esophagus and its association with the clinicopathological characteristics and survival in patients with esophageal cancer. Infect Agent Cancer 2016; 11:3. [PMID: 26788120 PMCID: PMC4717526 DOI: 10.1186/s13027-016-0049-x] [Citation(s) in RCA: 197] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 01/11/2016] [Indexed: 12/16/2022] Open
Abstract
Background Mounting evidence suggests a causal relationship between specific bacterial infections and the development of certain malignancies. However, the possible role of the keystone periodontal pathogen, Porphyromonas gingivalis, in esophageal squamous cell carcinoma (ESCC) remains unknown. Therefore, we examined the presence of P. gingivalis in esophageal mucosa, and the relationship between P. gingivalis infection and the diagnosis and prognosis of ESCC. Methods The presence of P. gingivalis in the esophageal tissues from ESCC patients and normal controls was examined by immunohistochemistry using antibodies targeting whole bacteria and its unique secreted protease, the gingipain Kgp. qRT-PCR was used as a confirmatory approach to detect P. gingivalis 16S rDNA. Clinicopathologic characteristics were collected to analyze the relationship between P. gingivalis infection and development of ESCC. Results P. gingivalis was detected immunohistochemically in 61 % of cancerous tissues, 12 % of adjacent tissues and was undetected in normal esophageal mucosa. A similar distribution of lysine-specific gingipain, a catalytic endoprotease uniquely secreted by P. gingivalis, and P. gingivalis 16S rDNA was also observed. Moreover, statistic correlations showed P. gingivalis infection was positively associated with multiple clinicopathologic characteristics, including differentiation status, metastasis, and overall survival rate. Conclusion These findings demonstrate for the first time that P. gingivalis infects the epithelium of the esophagus of ESCC patients, establish an association between infection with P. gingivalis and the progression of ESCC, and suggest P. gingivalis infection could be a biomarker for this disease. More importantly, these data, if confirmed, indicate that eradication of a common oral pathogen could potentially contribute to a reduction in the overall ESCC burden. Electronic supplementary material The online version of this article (doi:10.1186/s13027-016-0049-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Shegan Gao
- Henan Key Laboratory of Cancer Epigenetics, Cancer Institute, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, 471003 China
| | - Shuoguo Li
- Henan Key Laboratory of Cancer Epigenetics, Cancer Institute, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, 471003 China
| | - Zhikun Ma
- Henan Key Laboratory of Cancer Epigenetics, Cancer Institute, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, 471003 China
| | - Shuo Liang
- Henan Key Laboratory of Cancer Epigenetics, Cancer Institute, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, 471003 China
| | - Tanyou Shan
- Henan Key Laboratory of Cancer Epigenetics, Cancer Institute, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, 471003 China
| | - Mengxi Zhang
- Henan Key Laboratory of Cancer Epigenetics, Cancer Institute, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, 471003 China
| | - Xiaojuan Zhu
- Henan Key Laboratory of Cancer Epigenetics, Cancer Institute, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, 471003 China
| | - Pengfei Zhang
- Henan Key Laboratory of Cancer Epigenetics, Cancer Institute, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, 471003 China
| | - Gang Liu
- Henan Key Laboratory of Cancer Epigenetics, Cancer Institute, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, 471003 China
| | - Fuyou Zhou
- Department of Oncology, Anyang People's Hospital, Anyang, 471500 China
| | - Xiang Yuan
- Henan Key Laboratory of Cancer Epigenetics, Cancer Institute, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, 471003 China
| | - Ruinuo Jia
- Henan Key Laboratory of Cancer Epigenetics, Cancer Institute, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, 471003 China
| | - Jan Potempa
- Department of Microbiology, Faculty of Biochemistry, Biophysics, and Biotechnology, Jagiellonian University, Krakow, Poland ; Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Room 263D, 501 South Preston Street, Louisville, KY 40202 USA
| | - David A Scott
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Room 263D, 501 South Preston Street, Louisville, KY 40202 USA
| | - Richard J Lamont
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Room 263D, 501 South Preston Street, Louisville, KY 40202 USA
| | - Huizhi Wang
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Room 263D, 501 South Preston Street, Louisville, KY 40202 USA
| | - Xiaoshan Feng
- Henan Key Laboratory of Cancer Epigenetics, Cancer Institute, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, 471003 China ; Department of Oncology, Henan University of Science and Technology, 24 Jinghua Road, Jianxi Qu, Luoyang, 471500 Henan China
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Involvement of an Skp-Like Protein, PGN_0300, in the Type IX Secretion System of Porphyromonas gingivalis. Infect Immun 2015; 84:230-40. [PMID: 26502912 DOI: 10.1128/iai.01308-15] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 10/20/2015] [Indexed: 12/15/2022] Open
Abstract
The oral Gram-negative anaerobic bacterium Porphyromonas gingivalis is an important pathogen involved in chronic periodontitis. Among its virulence factors, the major extracellular proteinases, Arg-gingipain and Lys-gingipain, are of interest given their abilities to degrade host proteins and process other virulence factors. Gingipains possess C-terminal domains (CTDs) and are translocated to the cell surface or into the extracellular milieu by the type IX secretion system (T9SS). Gingipains contribute to the colonial pigmentation of the bacterium on blood agar. In this study, Omp17, the PGN_0300 gene product, was found in the outer membrane fraction. A mutant lacking Omp17 did not show pigmentation on blood agar and showed reduced proteolytic activity of the gingipains. CTD-containing proteins were released from bacterial cells without cleavage of the CTDs in the omp17 mutant. Although synthesis of the anionic polysaccharide (A-LPS) was not affected in the omp17 mutant, the processing of and A-LPS modification of CTD-containing proteins was defective. PorU, a C-terminal signal peptidase that cleaves the CTDs of other CTD-containing proteins, was not detected in any membrane fraction of the omp17 mutant, suggesting that the defective maturation of CTD-containing proteins by impairment of Omp17 is partly due to loss of function of PorU. In the mouse subcutaneous infection experiment, the omp17 mutant was less virulent than the wild type. These results suggested that Omp17 is involved in P. gingivalis virulence.
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Tancharoen S, Matsuyama T, Kawahara KI, Tanaka K, Lee LJ, Machigashira M, Noguchi K, Ito T, Imamura T, Potempa J, Kikuchi K, Maruyama I. Cleavage of host cytokeratin-6 by lysine-specific gingipain induces gingival inflammation in periodontitis patients. PLoS One 2015; 10:e0117775. [PMID: 25688865 PMCID: PMC4331500 DOI: 10.1371/journal.pone.0117775] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 12/30/2014] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND/PURPOSE Lysine-specific gingipain (Kgp) is a virulence factor secreted from Porphyromonas gingivalis (P. gingivalis), a major etiological bacterium of periodontal disease. Keratin intermediate filaments maintain the structural integrity of gingival epithelial cells, but are targeted by Kgp to produce a novel cytokeratin 6 fragment (K6F). We investigated the release of K6F and its induction of cytokine secretion. METHODS K6F present in the gingival crevicular fluid of periodontal disease patients and in gingipain-treated rat gingival epithelial cell culture supernatants was measured by matrix-assisted laser desorption/ionization time-of-flight mass spectrometer-based rapid quantitative peptide analysis using BLOTCHIP. K6F in gingival tissues was immunostained, and cytokeratin 6 protein was analyzed by immunofluorescence staining and flow cytometry. Activation of MAPK in gingival epithelial cells was evaluated by immunoblotting. ELISA was used to measure K6F and the cytokines release induced by K6F. Human gingival fibroblast migration was assessed using a Matrigel invasion chamber assay. RESULTS We identified K6F, corresponding to the C-terminus region of human cytokeratin 6 (amino acids 359-378), in the gingival crevicular fluid of periodontal disease patients and in the supernatant from gingival epithelial cells cultured with Kgp. K6F antigen was distributed from the basal to the spinous epithelial layers in gingivae from periodontal disease patients. Cytokeratin 6 on gingival epithelial cells was degraded by Kgp, but not by Arg-gingipain, P. gingivalis lipopolysaccharide or Actinobacillus actinomycetemcomitans lipopolysaccharide. K6F, but not a scrambled K6F peptide, induced human gingival fibroblast migration and secretion of interleukin (IL)-6, IL-8 and monocyte chemoattractant protein-1. These effects of K6F were mediated by activation of p38 MAPK and Jun N-terminal kinase, but not p42/44 MAPK or p-Akt. CONCLUSION Kgp degrades gingival epithelial cell cytokeratin 6 to K6F that, on release, induces invasion and cytokine secretion by human gingival fibroblasts. Thus, Kgp may contribute to the development of periodontal disease.
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Affiliation(s)
- Salunya Tancharoen
- Department of Pharmacology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Takashi Matsuyama
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Ko-ichi Kawahara
- Laboratory of Functional Foods, Department of Biomedical Engineering, Osaka Institute of Technology, Osaka, Japan
| | - Kenji Tanaka
- Membrane Protein and Ligand Analysis Center, Protosera Inc., Amagasaki, Japan
| | - Lyang-Ja Lee
- Membrane Protein and Ligand Analysis Center, Protosera Inc., Amagasaki, Japan
| | - Miho Machigashira
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Kazuyuki Noguchi
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Takashi Ito
- Department of Systems Biology in Thromboregulation, Kagoshima University Graduate School of Medical and Dental Science, Kagoshima, Japan
| | - Takahisa Imamura
- Department of Molecular Pathology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Jan Potempa
- Department of Periodontics, Endodontics and Dental Hygiene, University of Louisville School of Dentistry, Louisville, Kentucky, United States of America
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Kiyoshi Kikuchi
- Department of Physiology, Kurume University School of Medicine, Fukuoka, Japan
| | - Ikuro Maruyama
- Department of Systems Biology in Thromboregulation, Kagoshima University Graduate School of Medical and Dental Science, Kagoshima, Japan
- * E-mail:
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Inaba H, Sugita H, Kuboniwa M, Iwai S, Hamada M, Noda T, Morisaki I, Lamont RJ, Amano A. Porphyromonas gingivalis promotes invasion of oral squamous cell carcinoma through induction of proMMP9 and its activation. Cell Microbiol 2013; 16:131-45. [PMID: 23991831 DOI: 10.1111/cmi.12211] [Citation(s) in RCA: 154] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 08/02/2013] [Accepted: 08/15/2013] [Indexed: 02/06/2023]
Abstract
Recent epidemiological studies have revealed a significant association between periodontitis and oral squamous cell carcinoma (OSCC). Furthermore, matrix metalloproteinase 9 (MMP9) is implicated in the invasion and metastasis of tumour cells. We examined the involvement of Porphyromonas gingivalis, a periodontal pathogen, in OSCC invasion through induced expression of proMMP and its activation. proMMP9 was continuously secreted from carcinoma SAS cells, while P. gingivalis infection increased proenzyme expression and subsequently processed it to active MMP9 in culture supernatant, which enhanced cellular invasion. In contrast, Fusobacterium nucleatum, another periodontal organism, failed to demonstrate such activities. The effects of P. gingivalis were observed with highly invasive cells, but not with the low invasivetype. P. gingivalis also stimulated proteinase-activated receptor 2 (PAR2) and enhanced proMMP9 expression, which promoted cellular invasion. P. gingivalis mutants deficient in gingipain proteases failed to activate MMP9. Infected SAS cells exhibited activation of ERK1/2, p38, and NF-kB, and their inhibitors diminished both proMMP9-overexpression and cellular invasion. Together, our results show that P. gingivalis activates the ERK1/2-Ets1, p38/HSP27, and PAR2/NF-kB pathways to induce proMMP9 expression, after which the proenzyme is activated by gingipains to promote cellular invasion of OSCC cell lines. These findings suggest a novel mechanism of progression and metastasis of OSCC associated with periodontitis.
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Affiliation(s)
- Hiroaki Inaba
- Department of Oral Frontier Biology, Center for Frontier Oral Science, Osaka University Graduate School of Dentistry, Suita, Osaka, 565-0871, Japan
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Zhao L, La VD, Grenier D. Antibacterial, Antiadherence, Antiprotease, and Anti-Inflammatory Activities of Various Tea Extracts: Potential Benefits for Periodontal Diseases. J Med Food 2013; 16:428-36. [PMID: 23631500 DOI: 10.1089/jmf.2012.0207] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Affiliation(s)
- Lei Zhao
- Oral Ecology Research Group, Faculty of Dentistry, Laval University, Quebec City, Quebec, Canada
- Department of Periodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Vu Dang La
- Oral Ecology Research Group, Faculty of Dentistry, Laval University, Quebec City, Quebec, Canada
| | - Daniel Grenier
- Oral Ecology Research Group, Faculty of Dentistry, Laval University, Quebec City, Quebec, Canada
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Sato K, Yukitake H, Narita Y, Shoji M, Naito M, Nakayama K. Identification ofPorphyromonas gingivalisproteins secreted by the Por secretion system. FEMS Microbiol Lett 2012; 338:68-76. [DOI: 10.1111/1574-6968.12028] [Citation(s) in RCA: 112] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 10/04/2012] [Indexed: 01/19/2023] Open
Affiliation(s)
- Keiko Sato
- Division of Microbiology and Oral Infection; Department of Molecular Microbiology and Immunology; Nagasaki University Graduate School of Biomedical Sciences; Nagasaki; Japan
| | - Hideharu Yukitake
- Division of Microbiology and Oral Infection; Department of Molecular Microbiology and Immunology; Nagasaki University Graduate School of Biomedical Sciences; Nagasaki; Japan
| | - Yuka Narita
- Division of Microbiology and Oral Infection; Department of Molecular Microbiology and Immunology; Nagasaki University Graduate School of Biomedical Sciences; Nagasaki; Japan
| | - Mikio Shoji
- Division of Microbiology and Oral Infection; Department of Molecular Microbiology and Immunology; Nagasaki University Graduate School of Biomedical Sciences; Nagasaki; Japan
| | - Mariko Naito
- Division of Microbiology and Oral Infection; Department of Molecular Microbiology and Immunology; Nagasaki University Graduate School of Biomedical Sciences; Nagasaki; Japan
| | - Koji Nakayama
- Division of Microbiology and Oral Infection; Department of Molecular Microbiology and Immunology; Nagasaki University Graduate School of Biomedical Sciences; Nagasaki; Japan
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Dabija-Wolter G, Bakken V, Cimpan MR, Johannessen AC, Costea DE. In vitro reconstruction of human junctional and sulcular epithelium. J Oral Pathol Med 2012; 42:396-404. [PMID: 22947066 PMCID: PMC3664418 DOI: 10.1111/jop.12005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/01/2012] [Indexed: 11/29/2022]
Abstract
BACKGROUND The aim of this study was to develop and characterize standardized in vitro three-dimensional organotypic models of human junctional epithelium (JE) and sulcular epithelium (SE). METHODS Organotypic models were constructed by growing human normal gingival keratinocytes on top of collagen matrices populated with gingival fibroblasts (GF) or periodontal ligament fibroblasts (PLF). Tissues obtained were harvested at different time points and assessed for epithelial morphology, proliferation (Ki67), expression of JE-specific markers (ODAM and FDC-SP), cytokeratins (CK), transglutaminase, filaggrin, and basement membrane proteins (collagen IV and laminin1). RESULTS The epithelial component in 3- and 5-day organotypics showed limited differentiation and expressed Ki-67, ODAM, FDC-SP, CK 8, 13, 16, 19, and transglutaminase in a similar fashion to control JE samples. PLF supported better than GF expression of CK19 and suprabasal proliferation, although statistically significant only at day 5. Basement membrane proteins started to be deposited only from day 5. The rate of proliferating cells as well as the percentage of CK19-expressing cells decreased significantly in 7- and 9-day cultures. Day 7 organotypics presented higher number of epithelial cell layers, proliferating cells in suprabasal layers, and CK expression pattern similar to SE. CONCLUSION Both time in culture and fibroblast type had impact on epithelial phenotype. Five-day cultures with PLF are suggested as JE models, 7-day cultures with PLF or GF as SE models, while 9-day cultures with GF as gingival epithelium (GE) models. Such standard, reproducible models represent useful tools to study periodontal bacteria–host interactions in vitro.
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Affiliation(s)
- G Dabija-Wolter
- The Gade Institute, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway
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Effect of S-PRG Eluate on Biofilm Formation and Enzyme Activity of Oral Bacteria. Int J Dent 2012; 2012:814913. [PMID: 22693508 PMCID: PMC3368200 DOI: 10.1155/2012/814913] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 03/27/2012] [Accepted: 03/27/2012] [Indexed: 01/18/2023] Open
Abstract
Recently, the antibacterial activity of a composite resin containing prereacted glass ionomer (S-PRG) filler was revealed. We examined the effect of an S-PRG eluate on various biologic activities of Streptococcus mutans and Porphyromonas gingivalis. Adherence ability of S. mutans was evaluated by microtiter plate assay; protease and gelatinase activities of P. gingivalis were examined by synthetic substrate hydrolysis and gelatin film spot assay, respectively. Coaggregation of P. gingivalis with Fusobacterium nucleatum was also examined. S-PRG eluate was found to suppress streptococcal adherence. S-PRG eluate inhibited the protease and gelatinase activities of P. gingivalis and the coaggregation between P. gingivalis and F. nucleatum. These results indicate that S-PRG eluate suppresses streptococcal adherence and inhibits the protease and coaggregation activities of P. gingivalis. These findings may prompt research into novel strategies for preventing caries and periodontitis.
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Steukers L, Glorieux S, Vandekerckhove AP, Favoreel HW, Nauwynck HJ. Diverse microbial interactions with the basement membrane barrier. Trends Microbiol 2012; 20:147-55. [PMID: 22300759 PMCID: PMC7127156 DOI: 10.1016/j.tim.2012.01.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Revised: 12/20/2011] [Accepted: 01/02/2012] [Indexed: 11/01/2022]
Abstract
During primary contact with susceptible hosts, microorganisms face an array of barriers that thwart their invasion process. Passage through the basement membrane (BM), a 50-100-nm-thick crucial barrier underlying epithelia and endothelia, is a prerequisite for successful host invasion. Such passage allows pathogens to reach nerve endings or blood vessels in the stroma and to facilitate spread to internal organs. During evolution, several pathogens have developed different mechanisms to cross this dense matrix of sheet-like proteins. To breach the BM, some microorganisms have developed independent mechanisms, others hijack host cells that are able to transverse the BM (e.g. leukocytes and dendritic cells) and oncogenic microorganisms might even trigger metastatic processes in epithelial cells to penetrate the underlying BM.
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Affiliation(s)
- Lennert Steukers
- Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium.
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Porphyromonas gingivalis-mediated shedding of extracellular matrix metalloproteinase inducer (EMMPRIN) by oral epithelial cells: a potential role in inflammatory periodontal disease. Microbes Infect 2011; 13:1261-9. [PMID: 21835259 DOI: 10.1016/j.micinf.2011.07.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Revised: 06/20/2011] [Accepted: 07/12/2011] [Indexed: 11/23/2022]
Abstract
Extracellular matrix metalloproteinase inducer (EMMPRIN) or CD147 is a transmembrane glycoprotein expressed by various cell types, including oral epithelial cells. Recent studies have brought evidence that EMMPRIN plays a role in periodontitis. In the present study, we investigated the effect of Porphyromonas gingivalis, a major pathogen in chronic periodontitis, on the shedding of membrane-anchored EMMPRIN and on the expression of the EMMPRIN gene by oral epithelial cells. A potential contribution of shed EMMPRIN to the inflammatory process of periodontitis was analyzed by evaluating the effect of recombinant EMMPRIN on cytokine and matrix metalloproteinase (MMP) secretion by human gingival fibroblasts. ELISA and immunofluorescence analyses revealed that P. gingivalis mediated the shedding of epithelial cell-surface EMMPRIN in a dose- and time-dependent manner. Cysteine proteinase (gingipain)-deficient P. gingivalis mutants were used to demonstrate that both Arg- and Lys-gingipain activities are involved in EMMPRIN shedding. Real-time PCR showed that P. gingivalis had no significant effect on the expression of the EMMPRIN gene in epithelial cells. Recombinant EMMPRIN induced the secretion of IL-6 and MMP-3 by gingival fibroblasts, a phenomenon that appears to involve mitogen activated protein kinases. The present study brought to light a new mechanism by which P. gingivalis can promote the inflammatory response during periodontitis.
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Souvenir R, Fathali N, Ostrowski RP, Lekic T, Zhang JH, Tang J. Tissue inhibitor of matrix metalloproteinase-1 mediates erythropoietin-induced neuroprotection in hypoxia ischemia. Neurobiol Dis 2011; 44:28-37. [PMID: 21689752 DOI: 10.1016/j.nbd.2011.05.020] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 05/17/2011] [Accepted: 05/28/2011] [Indexed: 02/06/2023] Open
Abstract
Previous studies have shown that erythropoietin (EPO) is neuroprotective in both in vivo and in vitro models of hypoxia ischemia. However these studies hold limited clinical translations because the underlying mechanism remains unclear and the key molecules involved in EPO-induced neuroprotection are still to be determined. This study investigated if tissue inhibitor of matrix metalloproteinase-1 (TIMP-1) and its upstream regulator signaling molecule Janus kinase-2 (JAK-2) are critical in EPO-induced neuroprotection. Hypoxia ischemia (HI) was modeled in-vitro by oxygen and glucose deprivation (OGD) and in-vivo by a modified version of Rice-Vannucci model of HI in 10-day-old rat pups. EPO treated cells were exposed to AG490, an inhibitor of JAK-2 or TIMP-1 neutralizing antibody for 2h with OGD. Cell death, phosphorylation of JAK-2 and signal transducers and activators of transcription protein-3 (STAT-3), TIMP-1 expression, and matrix metalloproteinase-9 (MMP-9) activity were measured and compared with normoxic group. Hypoxic ischemic animals were treated one hour following HI and evaluated 48 h after. Our data showed that EPO significantly increased cell survival, associated with increased TIMP-1 activity, phosphorylation of JAK-2 and STAT-3, and decreased MMP-9 activity in vivo and in vitro. EPO's protective effects were reversed by inhibition of JAK-2 or TIMP-1 in both models. We concluded that JAK-2, STAT-3 and TIMP-1 are key mediators of EPO-induced neuroprotection during hypoxia ischemia injury.
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Affiliation(s)
- Rhonda Souvenir
- Division of Microbiology and Molecular Genetics, Loma Linda University School of Medicine, Loma Linda, CA 92350, USA
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Guo Y, Nguyen KA, Potempa J. Dichotomy of gingipains action as virulence factors: from cleaving substrates with the precision of a surgeon's knife to a meat chopper-like brutal degradation of proteins. Periodontol 2000 2010; 54:15-44. [PMID: 20712631 DOI: 10.1111/j.1600-0757.2010.00377.x] [Citation(s) in RCA: 248] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Abstract
Cigarette smoke condensate (CSC) is the particulate matter of cigarette smoke. Porphyromonas gingivalis (P. gingivalis) is an opportunistic pathogen involved in periodontitis. It was hypothesized that the combination of CSC and P. gingivalis would increase the collagen-degrading ability of human gingival fibroblasts (HGFs). In this study, HGFs were exposed to CSC, P. gingivalis supernatant, and CSC plus P. gingivalis supernatant. The collagen-degrading ability and protein/mRNA levels of matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs) of HGFs were examined. The combined treatment increased collagen degradation, protein levels of active forms of MMP-1, MMP-2, MMP-3, and MMP-14 in conditioned media, and the low-molecular-weight fragment of MMP-14 in membrane extracts, as well as mRNA levels of MMP-1, MMP-2, and MMP-14. In conclusion, the combined effects of CSC and P. gingivalis increased HGF-mediated collagen degradation by destroying the balance between MMPs and TIMPs at multiple levels.
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Affiliation(s)
- W Zhang
- Department of Oral Biology, Indiana University School of Dentistry, 1121 West Michigan Street, DS 271, Indianapolis, IN 46202, USA
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Yamazaki-Kubota T, Miyamoto M, Sano Y, Kusumoto M, Yonezu T, Sugita K, Okuda K, Yakushiji M, Ishihara K. Analysis of matrix metalloproteinase (MMP-8 and MMP-2) activity in gingival crevicular fluid from children with Down’s syndrome. J Periodontal Res 2010; 45:170-6. [DOI: 10.1111/j.1600-0765.2009.01214.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yanti, Lee M, Kim D, Hwang JK. Inhibitory effect of panduratin A on c-Jun N-terminal kinase and activator protein-1 signaling involved in Porphyromonas gingivalis supernatant-stimulated matrix metalloproteinase-9 expression in human oral epidermoid cells. Biol Pharm Bull 2010; 32:1770-5. [PMID: 19801842 DOI: 10.1248/bpb.32.1770] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Porphyromonas gingivalis, a type of Gram-negative periodontopathogen, causes periodontal disease by activating intracellular signaling pathways that produce excessive inflammatory responses such as matrix metalloproteinases (MMPs). Recently, we reported that panduratin A, a chalcone compound isolated from Kaempferia pandurata ROXB., caused the decreased levels of MMP-9 secretion, protein, and gene expression in human oral epidermoid KB cells exposed to P. gingivalis supernatant. In this study, we clarified if mitogen-activated protein kinase (MAPK) signaling mediated MMP-9 expression by examining the effect of specific MAPK inhibitors, i.e. U0126, SB203580, and SP600125, on P. gingivalis supernatant-stimulated MMP-9 expression in KB cells. We next elucidated the molecular mechanism by which panduratin A attenuated signaling pathways involved in MMP-9 expression by performing gelatin zymography, Western blotting, reverse transcription-polymerase chain reaction, and promoter assays. Exposure of KB cells to P. gingivalis supernatant up-regulated the expression of MMP-9 protein and gene, and activation of activator protein-1 (AP-1) element, MAPK phosphorylation (extracellular signal-related kinase 1/2 (ERK1/2), p38, and c-Jun N-terminal kinase (JNK)), and transcription factors (Elk1, c-Jun, and c-Fos). A JNK inhibitor (SP600125) significantly attenuated MMP-9 gene expression and AP-1 activity in KB cells in response to P. gingivalis supernatant. Similar to SP600125, panduratin A was found to strongly suppress the level of phosphorylated JNK and block AP-1 activity in P. gingivalis supernatant-stimulated KB cells. In summary, JNK and AP-1 are the major signaling for P. gingivalis supernatant-stimulated MMP-9 expression in KB cells, and panduratin A markedly down-regulates MMP-9 expression through inhibition of these signaling.
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Affiliation(s)
- Yanti
- Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seodaemun-gu, Seoul 120-749, Korea
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Hwang JK. Suppressive effect of ethanolic Kaempferia pandurata Roxb. extract on matrix metalloproteinase-2 expression in Porphyromonas gingivalis-treated human gingival fibroblasts in vitro. J Oral Sci 2010; 52:583-91. [DOI: 10.2334/josnusd.52.583] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Repeke CE, Trombone APF, Ferreira SB, Cardoso CR, Silveira EM, Martins W, Trevilatto PC, Silva JS, Campanelli AP, Garlet GP. Strong and persistent microbial and inflammatory stimuli overcome the genetic predisposition to higher matrix metalloproteinase-1 (MMP-1) expression: a mechanistic explanation for the lack of association of MMP1-1607 single-nucleotide polymorphism genotypes with MMP-1 expression in chronic periodontitis lesions. J Clin Periodontol 2009; 36:726-38. [PMID: 19659894 DOI: 10.1111/j.1600-051x.2009.01447.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
AIMS Our objective was to evaluate the association between the MMP1-1607 single-nucleotide polymorphism (SNP), periodontopathogens and inflammatory cytokines with matrix metalloproteinase-1 (MMP-1) mRNA levels in vitro and in vivo. MATERIALS AND METHODS This study investigated the influence of genetic (MMP1-1607 SNP), microbial (Porphyromonas gingivalis, Treponema denticola, Tannerella forsythia, Actinobacillus actinomycetemcomitans) and inflammatory [tumour necrosis factor-alpha (TNF-alpha) and interleukin-1beta (IL-1beta)] factors on the determination of MMP-1 mRNA levels in periodontal tissues of non-smoker chronic periodontitis (CP, N=178) and control (C, N=190) groups. The effects of single and repeated lipopolysaccharide (LPS) and inflammatory cytokine stimulation of macrophages with distinct MMP1-1607 SNP genotypes were also investigated. RESULTS In healthy tissues, the MMP1-1607 2G allele was associated with higher MMP-1 levels while in CP MMP-1 levels were associated with the presence and load of periodontopathogens, and also with TNF-alpha and IL-1beta expression irrespective of the MMP1-1607 genotype. In vitro data demonstrate that in 2G macrophages low- and intermediate-dose LPS and TNF-alpha+IL-1beta stimulation was associated with increased MMP-1 expression, while strong and repeated stimulation resulted in higher MMP-1 levels irrespective of the MMP1-1607 genotype. CONCLUSION Our data demonstrate a limited role for MMP1-1607 SNP in periodontitis, where the extensive chronic antigenic challenge exposure overcomes the genetic control and plays a major role in the determination of MMP-1 expression.
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Affiliation(s)
- Carlos Eduardo Repeke
- Department of Biological Sciences, School of Dentistry of Bauru, São Paulo University - FOB/USP, Bauru, SP, Brazil
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Gwon SH, Hwang JK. Kaempferia pandurata Roxb. inhibits Porphyromonas gingivalis supernatant-induced matrix metalloproteinase-9 expression via signal transduction in human oral epidermoid cells. JOURNAL OF ETHNOPHARMACOLOGY 2009; 123:315-324. [PMID: 19429378 DOI: 10.1016/j.jep.2009.02.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2008] [Revised: 02/11/2009] [Accepted: 02/24/2009] [Indexed: 05/27/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Kaempferia pandurata Roxb., an edible tropical medicinal plant (Zingiberaceae), has been traditionally used to treat dental caries. However, its efficacy on inhibition of matrix metalloproteinase (MMP)-9 for preventing periodontal inflammation has been rarely studied to date. AIM OF THE STUDY This present study was focused to investigate the effects of the ethanolic extract of Kaempferia pandurata Roxb. on inhibition of Porphyromonas gingivalis supernatant-induced MMP-9 expression through activation of mitogen-activated protein kinase (MAPK) signaling pathways in human oral epidermoid KB cells. MATERIALS AND METHODS MMP-9 expression and its signaling pathways in KB cells induced by Porphyromonas gingivalis supernatant were determined by gelatin zymogram, Western blotting and reporter gene assays. RESULTS Kaempferia pandurata significantly decreased MMP-9 expression at both protein and mRNA levels in a dose-dependent manner. Kaempferia pandurata interfered Porphyromonas gingivalis supernatant-induced MMP-9 expression in KB cells by downregulating MAPK phosphorylation (extracellular signal-related kinase 1/2, p38 kinase and c-Jun N-terminal kinase), inhibiting transcriptional expression (Elk1, c-Jun and c-Fos), and blocking AP-1 and NF-kappaB activities. CONCLUSIONS Kaempferia pandurata could be employed as a candidate for MMP-9 inhibitor with therapeutic potential for treatment of periodontal inflammation.
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Sato K, Kido N, Murakami Y, Hoover CI, Nakayama K, Yoshimura F. Lipopolysaccharide biosynthesis-related genes are required for colony pigmentation of Porphyromonas gingivalis. MICROBIOLOGY-SGM 2009; 155:1282-1293. [PMID: 19332829 DOI: 10.1099/mic.0.025163-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The periodontopathic bacterium Porphyromonas gingivalis forms pigmented colonies when incubated on blood agar plates as a result of accumulation of mu-oxo haem dimer on the cell surface. Gingipain-adhesin complexes are responsible for production of mu-oxo haem dimer from haemoglobin. Non-pigmented mutants (Tn6-5, Tn7-1, Tn7-3 and Tn10-4) were isolated from P. gingivalis by Tn4351 transposon mutagenesis [Hoover & Yoshimura (1994), FEMS Microbiol Lett 124, 43-48]. In this study, we found that the Tn6-5, Tn7-1 and Tn7-3 mutants carried Tn4351 DNA in a gene homologous to the ugdA gene encoding UDP-glucose 6-dehydrogenase, a gene encoding a putative group 1 family glycosyltransferase and a gene homologous to the rfa gene encoding ADP heptose-LPS heptosyltransferase, respectively. The Tn10-4 mutant carried Tn4351 DNA at the same position as that for Tn7-1. Gingipain activities associated with cells of the Tn7-3 mutant (rfa) were very weak, whereas gingipain activities were detected in the culture supernatants. Immunoblot and mass spectrometry analyses also revealed that gingipains, including their precursor forms, were present in the culture supernatants. A lipopolysaccharide (LPS) fraction of the rfa deletion mutant did not show the ladder pattern that was usually seen for the LPS of the wild-type P. gingivalis. A recombinant chimera gingipain was able to bind to an LPS fraction of the wild-type P. gingivalis in a dose-dependent manner. These results suggest that the rfa gene product is associated with biosynthesis of LPS and/or cell-surface polysaccharides that can function as an anchorage for gingipain-adhesin complexes.
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Affiliation(s)
- Keiko Sato
- Department of Microbiology, School of Dentistry, Aichi-Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, Aichi 464-8650, Japan
| | - Nobuo Kido
- Division of Plant Growth Physiology, Nagoya University Graduate School of Biological Sciences, Furou-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Yukitaka Murakami
- Department of Microbiology, School of Dentistry, Aichi-Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, Aichi 464-8650, Japan
| | - Charles I Hoover
- University of California, San Francisco, CA 94143-0512, USA.,Department of Microbiology, School of Dentistry, Aichi-Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, Aichi 464-8650, Japan
| | - Koji Nakayama
- Division of Microbiology and Oral Infection, Department of Molecular Microbiology and Immunology, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Nagasaki 852-8588, Japan
| | - Fuminobu Yoshimura
- Department of Microbiology, School of Dentistry, Aichi-Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, Aichi 464-8650, Japan
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Lysine-specific gingipain promotes lipopolysaccharide- and active-vitamin D3-induced osteoclast differentiation by degrading osteoprotegerin. Biochem J 2009; 419:159-66. [PMID: 19102726 DOI: 10.1042/bj20081469] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Porphyromonas gingivalis is one of the major pathogens of periodontitis, a condition characterized by excessive alveolar bone resorption by osteoclasts. The bacterium produces cysteine proteases called gingipains, which are classified according to their cleavage-site specificity into Kgps (lysine-specific gingipains) and Rgps (arginine-specific gingipains). In the present study we examined the effects of gingipains on osteoclast differentiation. In co-cultures of mouse bone-marrow cells and osteoblasts, formation of multinucleated osteoclasts induced by 1alpha,25(OH)(2)D(3) (1alpha,25-dihydroxyvitamin D(3)) was augmented by Kgp but not by RgpB. A physiological concentration (0.1 nM) of 1alpha,25(OH)(2)D(3) induced the osteoclast formation in the presence of 100 nM Kgp to an extent comparable with that induced by 10 nM 1alpha,25(OH)(2)D(3). Kgp also enhanced osteoclastogenesis induced by various microbial components, including lipopolysaccharide. Combined use of Kgp and 1alpha,25(OH)(2)D(3) or lipopolysaccharide also increased the number of resorption pits developed on dentin slices, indicating that the osteoclasts formed in the presence of Kgp possess bone-resorbing activity. The enhanced osteoclastogenesis by Kgp was correlated with a depletion of osteoprotegerin in co-culture medium and was proteolytic-activity-dependent, since benzyloxycarbonyl-L-phenylalanyl-L-lysylacycloxyketone, an inhibitor of Kgp, completely abolished osteoclastogenesis induced by Kgp. Kgp digested osteoprotegerin, since its recombinant protein was susceptible to degradation by Kgp in the presence of serum. As a result, Kgp did not augment osteoclastogenesis in co-cultures of osteoprotegerin-deficient osteoblasts and bone-marrow cells. In addition, enhanced osteoclastogenesis by Kgp was abolished by an excess amount of recombinant osteoprotegerin. These findings suggest that degradation of osteoprotegerin is one of the mechanisms underlying promotion of osteoclastogenesis by Kgp.
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Allaker RP, Douglas CI. Novel anti-microbial therapies for dental plaque-related diseases. Int J Antimicrob Agents 2009; 33:8-13. [DOI: 10.1016/j.ijantimicag.2008.07.014] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2008] [Accepted: 07/29/2008] [Indexed: 10/21/2022]
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Yanti, Oh HI, Anggakusuma, Hwang JK. Effects of Panduratin A Isolated from Kaempferia pandurata ROXB. on the Expression of Matrix Metalloproteinase-9 by Porphyromonas gingivalis Supernatant-Induced KB Cells. Biol Pharm Bull 2009; 32:110-5. [DOI: 10.1248/bpb.32.110] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yanti
- Department of Biotechnology, Yonsei University
- Faculty of Biotechnology, Atma Jaya Catholic University
| | - Hyun-In Oh
- Department of Biotechnology, Yonsei University
| | - Anggakusuma
- Department of Biotechnology, Yonsei University
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Guan SM, Shu L, Fu SM, Liu B, Xu XL, Wu JZ. Prevotella intermedia induces matrix metalloproteinase-9 expression in human periodontal ligament cells. FEMS Microbiol Lett 2008; 283:47-53. [DOI: 10.1111/j.1574-6968.2008.01140.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Individual matrix metalloproteinases control distinct transcriptional responses in airway epithelial cells infected with Pseudomonas aeruginosa. Infect Immun 2007; 75:5640-50. [PMID: 17923522 DOI: 10.1128/iai.00799-07] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Airway epithelium is the initial point of host-pathogen interaction in Pseudomonas aeruginosa infection, an important pathogen in cystic fibrosis and nosocomial pneumonia. We used global gene expression analysis to determine airway epithelial transcriptional responses dependent on matrilysin (matrix metalloproteinase 7 [MMP-7]) and stromelysin-2 (MMP-10), two MMPs induced by acute P. aeruginosa pulmonary infection. Extraction of differential gene expression (EDGE) analysis of gene expression changes in P. aeruginosa-infected organotypic tracheal epithelial cell cultures from wild-type, Mmp7-/-, and Mmp10-/- mice identified 2,091 matrilysin-dependent and 1,628 stromelysin-2-dependent genes that were differentially expressed. Key node network analysis showed that these MMPs controlled distinct gene expression programs involved in proliferation, cell death, immune responses, and signal transduction, among other host defense processes. Our results demonstrate discrete roles for these MMPs in regulating epithelial responses to Pseudomonas infection and show that a global genomics strategy can be used to assess MMP function.
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