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Dommisch H, Hoedke D, Valles C, Vilarrasa J, Jepsen S, Pascual La Rocca A. Efficacy of professionally administered chemical agents as an adjunctive treatment to submarginal instrumentation during the therapy of peri‐implant mucositis. J Clin Periodontol 2022. [DOI: 10.1111/jcpe.13747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 10/24/2022] [Accepted: 11/04/2022] [Indexed: 11/16/2022]
Affiliation(s)
- H. Dommisch
- Department of Periodontology Oral Medicine and Oral Surgery, Dentistry, Charité ‐ Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt‐Universität zu Berlin, and Berlin Institute of Health, 14197 Berlin, Germany, Aßmannshauserstr. 4‐6 Berlin Germany
| | - D. Hoedke
- Department of Periodontology Oral Medicine and Oral Surgery, Dentistry, Charité ‐ Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt‐Universität zu Berlin, and Berlin Institute of Health, 14197 Berlin, Germany, Aßmannshauserstr. 4‐6 Berlin Germany
| | - C. Valles
- Department od Periodontology Facultad de Odontología, Universitat Internacional de Catalunya
| | - J. Vilarrasa
- Department od Periodontology Facultad de Odontología, Universitat Internacional de Catalunya
| | - S. Jepsen
- Department of Periodontology, Operative and Preventive Dentistry University Hospital Bonn Bonn Germany
| | - A. Pascual La Rocca
- Department od Periodontology Facultad de Odontología, Universitat Internacional de Catalunya
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Fallon CE, Walker AC, Lewis S, Cicero J, Faust L, Heckscher CM, Pérez-Hernández CX, Pfeiffer B, Jepsen S. Evaluating firefly extinction risk: Initial red list assessments for North America. PLoS One 2021; 16:e0259379. [PMID: 34788329 PMCID: PMC8598072 DOI: 10.1371/journal.pone.0259379] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 10/18/2021] [Indexed: 11/19/2022] Open
Abstract
Fireflies are a family of charismatic beetles known for their bioluminescent signals. Recent anecdotal reports suggest that firefly populations in North America may be in decline. However, prior to this work, no studies have undertaken a systematic compilation of geographic distribution, habitat specificity, and threats facing North American fireflies. To better understand their extinction risks, we conducted baseline assessments according to the categories and criteria of the International Union for Conservation of Nature (IUCN) Red List for 132 species from the United States and Canada (approximately 79% of described species in the region). We found at least 18 species (14%) are threatened with extinction (e.g. categorized as Critically Endangered, Endangered, or Vulnerable) due to various pressures, including habitat loss, light pollution, and climate change (sea level rise and drought). In addition, more than half of the species (53%) could not be evaluated against the assessment criteria due to insufficient data, highlighting the need for further study. Future research and conservation efforts should prioritize monitoring and protecting populations of at-risk species, preserving and restoring habitat, gathering data on population trends, and filling critical information gaps for data deficient species suspected to be at risk.
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Affiliation(s)
- Candace E. Fallon
- The Xerces Society for Invertebrate Conservation, Portland, Oregon, United States of America
- IUCN SSC Firefly Specialist Group, Gland, Switzerland
| | - Anna C. Walker
- IUCN SSC Firefly Specialist Group, Gland, Switzerland
- New Mexico BioPark Society, Albuquerque, New Mexico, United States of America
| | - Sara Lewis
- IUCN SSC Firefly Specialist Group, Gland, Switzerland
- Department of Biology, Tufts University, Medford, Massachusetts, United States of America
| | - Joseph Cicero
- School of Plant Sciences, University of Arizona, Tucson, Arizona, United States of America
| | - Lynn Faust
- IUCN SSC Firefly Specialist Group, Gland, Switzerland
- Emory River Land Co., Knoxville, Tennessee, United States of America
| | - Christopher M. Heckscher
- IUCN SSC Firefly Specialist Group, Gland, Switzerland
- Department of Agriculture and Natural Resources, Delaware State University, Dover, Delaware, United States of America
| | - Cisteil X. Pérez-Hernández
- IUCN SSC Firefly Specialist Group, Gland, Switzerland
- Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México, Michoacán, México
| | - Ben Pfeiffer
- IUCN SSC Firefly Specialist Group, Gland, Switzerland
- Firefly Conservation and Research, New Braunfels, Texas, United States of America
| | - Sarina Jepsen
- The Xerces Society for Invertebrate Conservation, Portland, Oregon, United States of America
- IUCN SSC Firefly Specialist Group, Gland, Switzerland
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Hatfield RG, Strange JP, Koch JB, Jepsen S, Stapleton I. Neonicotinoid Pesticides Cause Mass Fatalities of Native Bumble Bees: A Case Study From Wilsonville, Oregon, United States. Environ Entomol 2021; 50:1095-1104. [PMID: 34145877 DOI: 10.1093/ee/nvab059] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Indexed: 05/28/2023]
Abstract
In June of 2013 an application of dinotefuran on an ornamental planting of European linden trees (Tilia cordata Mill. [Malvales: Malvalceae]) in a shopping mall parking lot in Wilsonville, Oregon provoked the largest documented pesticide kill of bumble bees in North America. Based on geographic information systems and population genetic analysis, we estimate that between 45,830 and 107,470 bumble bees originating from between 289 and 596 colonies were killed during this event. Dinotefuran is a neonicotinoid that is highly effective in exterminating and/or harming target pest insects and non-target beneficial insects. Analysis to detect the concentration of pesticides in flowers that received foliar application revealed that the minimum reported dinotefuran concentration of a sampled T. cordata flower was 7.4 ppm, or in excess of 737% above the LC50 of the beneficial pollinator, the honey bee (Apis mellifera Linnaeus, 1758 [Hymenoptera: Apidae]). Furthermore, sampled Vosnesensky bumble bees (Bombus vosnesenskii Radoskowski, 1862 [Hymenoptera: Apidae]) were found to have an average dinotefuran concentration of 0.92 ppm at the time of death, which exceeds the maximum LC50 of A. mellifera (0.884 ppm). Our study underscores the lethal impact of the neonicotinoid pesticide dinotefuran on pollinating insect populations in a suburban environment. To our knowledge, the documentation and impact of pesticide kills on wild populations of beneficial insects has not been widely reported in the scientific literature. It is likely that the vast majority of mass pesticide kills of beneficial insects across other environments go unnoticed and unreported.
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Affiliation(s)
| | - James P Strange
- Department of Entomology, The Ohio State University, Columbus, OH, USA
- U.S. Department of Agriculture, Agricultural Research Service, Pollinating Insect - Biology, Management, Systematics Research Unit, Logan, UT, USA
| | - Jonathan B Koch
- U.S. Department of Agriculture, Agricultural Research Service, Pollinating Insect - Biology, Management, Systematics Research Unit, Logan, UT, USA
| | - Sarina Jepsen
- The Xerces Society for Invertebrate Conservation, Portland, OR, USA
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Richter GM, Wagner G, Reichenmiller K, Staufenbiel I, Martins O, Löscher BS, Holtgrewe M, Jepsen S, Dommisch H, Schaefer AS. Exome Sequencing of 5 Families with Severe Early-Onset Periodontitis. J Dent Res 2021; 101:151-157. [PMID: 34515563 PMCID: PMC8807999 DOI: 10.1177/00220345211029266] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Periodontitis is characterized by alveolar bone loss leading to tooth loss. A small proportion of patients develop severe periodontitis at the juvenile or adolescent age without exposure to the main risk factors of the disease. It is considered that these cases carry rare variants with large causal effects, but the specific variants are largely unknown. In this study, we performed exome sequencing of 5 families with children who developed stage IV, grade C, periodontitis between 3 and 18 y of age. In 1 family, we found compound heterozygous variants in the gene CTSC (p.R272H, p.G139R), 1 of which was previously identified in a family with prepubertal periodontitis. Subsequent targeted resequencing of the CTSC gene in 24 patients <25 y of age (stage IV, grade C) identified the known mutation p.I453V (odds ratio = 4.06, 95% CI = 1.6 to 10.3, P = 0.001), which was previously reported to increase the risk for adolescent periodontitis. An affected sibling of another family carried a homozygous deleterious mutation in the gene TUT7 (p.R560Q, CADD score >30 [Combined Annotation Dependent Depletion]), which is implicated in regulation of interleukin 6 expression. Two other affected siblings shared heterozygous deleterious mutations in the interacting genes PADI1 and FLG (both CADD = 36), which contribute to the integrity of the environment-tissue barrier interface. Additionally, we found predicted deleterious mutations in the periodontitis risk genes ABCA1, GLT6D1, and SIGLEC5. We conclude that the CTSC variants p.R272H and p.I453V have different expressivity and diagnostic relevance for prepubertal and adolescent periodontitis, respectively. We propose additional causal variants for early-onset periodontitis, which also locate within genes that carry known susceptibility variants for common forms. However, the genetic architecture of juvenile periodontitis is complex and differs among the affected siblings of the sequenced families.
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Affiliation(s)
- G M Richter
- Department of Periodontology and Synoptic Dentistry, Institute for Dental and Craniofacial Sciences, Charité-University Medicine Berlin, Berlin, Germany
| | - G Wagner
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | | | - I Staufenbiel
- Department of Conservative Dentistry, Periodontology and Preventive Dentistry, Hannover Medical School, Hannover, Germany
| | - O Martins
- Institute of Periodontology, Department of Dentistry, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - B S Löscher
- Institute of Clinical Molecular Biology, Christian-Albrechts-University Kiel and University Hospital Schleswig-Holstein, Kiel, Germany
| | - M Holtgrewe
- Core Unit Bioinformatics-CUBI, Berlin Institute of Health, Charité-University Medicine Berlin, Berlin, Germany
| | - S Jepsen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - H Dommisch
- Department of Periodontology and Synoptic Dentistry, Institute for Dental and Craniofacial Sciences, Charité-University Medicine Berlin, Berlin, Germany
| | - A S Schaefer
- Department of Periodontology and Synoptic Dentistry, Institute for Dental and Craniofacial Sciences, Charité-University Medicine Berlin, Berlin, Germany
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Spiesman BJ, Gratton C, Hatfield RG, Hsu WH, Jepsen S, McCornack B, Patel K, Wang G. Assessing the potential for deep learning and computer vision to identify bumble bee species from images. Sci Rep 2021; 11:7580. [PMID: 33828196 PMCID: PMC8027374 DOI: 10.1038/s41598-021-87210-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 03/25/2021] [Indexed: 01/30/2023] Open
Abstract
Pollinators are undergoing a global decline. Although vital to pollinator conservation and ecological research, species-level identification is expensive, time consuming, and requires specialized taxonomic training. However, deep learning and computer vision are providing ways to open this methodological bottleneck through automated identification from images. Focusing on bumble bees, we compare four convolutional neural network classification models to evaluate prediction speed, accuracy, and the potential of this technology for automated bee identification. We gathered over 89,000 images of bumble bees, representing 36 species in North America, to train the ResNet, Wide ResNet, InceptionV3, and MnasNet models. Among these models, InceptionV3 presented a good balance of accuracy (91.6%) and average speed (3.34 ms). Species-level error rates were generally smaller for species represented by more training images. However, error rates also depended on the level of morphological variability among individuals within a species and similarity to other species. Continued development of this technology for automatic species identification and monitoring has the potential to be transformative for the fields of ecology and conservation. To this end, we present BeeMachine, a web application that allows anyone to use our classification model to identify bumble bees in their own images.
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Affiliation(s)
- Brian J Spiesman
- Department of Entomology, Kansas State University, Manhattan, KS, USA.
| | - Claudio Gratton
- Department of Entomology, University of Wiscosin - Madison, Madison, WI, USA
| | | | - William H Hsu
- Department of Computer Science, Kansas State University, Manhattan, KS, USA
| | - Sarina Jepsen
- The Xerces Society for Invertebrate Conservation, Portland, OR, USA
| | - Brian McCornack
- Department of Entomology, Kansas State University, Manhattan, KS, USA
| | - Krushi Patel
- Department of Electrical Engineering and Computer Science, University of Kansas, Lawrence, KS, USA
| | - Guanghui Wang
- Department of Electrical Engineering and Computer Science, University of Kansas, Lawrence, KS, USA.,Department of Computer Science, Ryerson University, Toronto, ON, Canada
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Cosgarea R, Eick S, Jepsen S, Arweiler NB, Juncar R, Tristiu R, Salvi GE, Heumann C, Sculean A. Microbiological and host-derived biomarker evaluation following non-surgical periodontal therapy with short-term administration of systemic antimicrobials: secondary outcomes of an RCT. Sci Rep 2020; 10:16322. [PMID: 33004857 PMCID: PMC7530673 DOI: 10.1038/s41598-020-73054-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 09/04/2020] [Indexed: 12/23/2022] Open
Abstract
Nonsurgical periodontal therapy with adjunctive use of systemic antimicrobials (for 7–14 days) showed improved clinical, microbiological and immunological results over the mechanical protocol alone. Considering the increasing risk for antimicrobial resistance with longer antibiotic regimes, it is important to establish the optimal antibiotic protocol with a maximum antimicrobial benefit and minimum risk for adverse effects. The aim of the study was to evaluate the microbiological and inflammatory outcomes 12-months after a 3-/7-day systemic antibiotic protocol [amoxicillin (AMX) + metronidazole (MET)] adjunctive to subgingival debridement in severe periodontitis compared to mechanical treatment alone. From the initially treated 102 patients, 75 subjects (Placebo group: n = 26; 3-day AMX + MET group: n = 24; 7-day AMX + MET group: n = 25) completed the 12-month examination. Clinical parameters, eight periodontal pathogens and inflammatory markers were determined at baseline and 3-, 6-, 12-months after therapy using real-time PCR and ELISA respectively. After 6 months, several periodontopathogens were significantly more reduced in the two antibiotic groups compared to placebo (p < 0.05). After 1 year, both antibiotic protocols showed significant reductions and detection of the keystone pathogen P. gingivalis compared to placebo. Antibiotic protocols, smoking, disease severity, baseline-BOP, -CAL and -IL-1β, as well as detection of T. denticola at 12-months significantly influenced the residual number of deep sites. The present data indicate that the systemic use of both short and longer antibiotic protocols (AMX + MET) adjunctive to nonsurgical periodontal therapy lead to higher microbiological improvements compared to subgingival debridement alone. The two investigated antibiotic protocols led to comparable microbiological and inflammatory results.
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Affiliation(s)
- Raluca Cosgarea
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Welschnonnen str 17, 53111, Bonn, Germany. .,Clinic for Prosthetic Dentistry, University Iuliu-Hatieganu, Cluj-Napoca, Romania. .,Department of Periodontology and Peri-implant Diseases, Philipps University Marburg, Marburg, Germany.
| | - S Eick
- Department of Periodontology, University of Bern, Bern, Switzerland
| | - S Jepsen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Welschnonnen str 17, 53111, Bonn, Germany
| | - N B Arweiler
- Department of Periodontology and Peri-implant Diseases, Philipps University Marburg, Marburg, Germany
| | - R Juncar
- Department of Dental Medicine, University of Oradea, Oradea, Romania
| | - R Tristiu
- Clinic for Prosthetic Dentistry, University Iuliu-Hatieganu, Cluj-Napoca, Romania
| | - G E Salvi
- Department of Periodontology, University of Bern, Bern, Switzerland
| | - C Heumann
- Department for Statistics, Ludwig-Maximilians University, Munich, Germany
| | - A Sculean
- Department of Periodontology, University of Bern, Bern, Switzerland
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7
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Innes NPT, Chu CH, Fontana M, Lo ECM, Thomson WM, Uribe S, Heiland M, Jepsen S, Schwendicke F. A Century of Change towards Prevention and Minimal Intervention in Cariology. J Dent Res 2020; 98:611-617. [PMID: 31107140 DOI: 10.1177/0022034519837252] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Better understanding of dental caries and other oral conditions has guided new strategies to prevent disease and manage its consequences at individual and public health levels. This article discusses advances in prevention and minimal intervention dentistry over the last century by focusing on some milestones within scientific, clinical, and public health arenas, mainly in cariology but also beyond, highlighting current understanding and evidence with future prospects. Dentistry was initially established as a surgical specialty. Dental caries (similar to periodontitis) was considered to be an infectious disease 100 years ago. Its ubiquitous presence and rampant nature-coupled with limited diagnostic tools and therapeutic treatment options-meant that these dental diseases were managed mainly by excising affected tissue. The understanding of the diseases and a change in their prevalence, extent, and severity, with evolutions in operative techniques, technologies, and materials, have enabled a shift from surgical to preventive and minimal intervention dentistry approaches. Future challenges to embrace include continuing the dental profession's move toward a more patient-centered, evidence-based, less invasive management of these diseases, focused on promoting and maintaining oral health in partnership with patients. In parallel, public health needs to continue to, for example, tackle social inequalities in dental health, develop better preventive and management options for existing disease risk groups (e.g., the growing aging population), and the development of reimbursement and health outcome models that facilitate implementation of these evolving strategies. A century ago, almost every treatment involved injections, a drill or scalpel, or a pair of forceps. Today, dentists have more options than ever before available to them. These are supported by evidence, have a minimal intervention focus, and result in better outcomes for patients. The profession's greatest challenge is moving this evidence into practice.
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Affiliation(s)
- N P T Innes
- 1 School of Dentistry, University of Dundee, Dundee, UK
| | - C H Chu
- 2 Faculty of Dentistry, University of Hong Kong, Hong Kong
| | - M Fontana
- 3 Cariology and Restorative Sciences, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - E C M Lo
- 2 Faculty of Dentistry, University of Hong Kong, Hong Kong
| | - W M Thomson
- 4 Department of Oral Sciences, School of Dentistry, University of Otago, Dunedin, New Zealand
| | - S Uribe
- 5 School of Dentistry, Universidad Austral de Chile, Valdivia, Chile
| | - M Heiland
- 6 Department of Oral and Maxillofacial Surgery, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - S Jepsen
- 7 Periodontology, Operative, and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - F Schwendicke
- 8 Operative and Preventive Dentistry, Charité-Universitätsmedizin Berlin, Berlin, Germany
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8
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Lewis SM, Wong CH, Owens ACS, Fallon C, Jepsen S, Thancharoen A, Wu C, De Cock R, Novák M, López-Palafox T, Khoo V, Reed JM. Corrigendum: A Global Perspective on Firefly Extinction Threats. Bioscience 2020. [DOI: 10.1093/biosci/biaa026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Sara M Lewis
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Department of Biology, Tufts University
| | - Choong Hay Wong
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Malaysia Nature Society, in Kuala Lumpur, Malaysia
| | - Avalon C S Owens
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Department of Biology, Tufts University
| | - Candace Fallon
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- The Xerces Society for Invertebrate Conservation, Portland, Oregon
| | - Sarina Jepsen
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- The Xerces Society for Invertebrate Conservation, Portland, Oregon
| | - Anchana Thancharoen
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Department of Entomology, Faculty of Agriculture, Kasetsart University, in Bangkok, Thailand
| | - Chiahsiung Wu
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Huafan University, in Taipei City, Taiwan
| | - Raphael De Cock
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Department of Biology's Evolutionary Ecology Research Group, University of Antwerp, Belgium
| | - Martin Novák
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Department of Ecology, Czech University of Life Sciences, Prague, Czech Republic
| | - Tania López-Palafox
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Instituto de Ecología, Universidad Nacional Autónoma de México, México City, México
| | - Veronica Khoo
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Forest Biodiversity Division of the Forest Research Institute Malaysia, Selangor, Malaysia
| | - J Michael Reed
- Firefly Specialist Group of the International Union for the Conservation of Nature Species Survival Commission (IUCN SSC)
- Department of Biology, Tufts University
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9
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Harvey JA, Heinen R, Armbrecht I, Basset Y, Baxter-Gilbert JH, Bezemer TM, Böhm M, Bommarco R, Borges PAV, Cardoso P, Clausnitzer V, Cornelisse T, Crone EE, Dicke M, Dijkstra KDB, Dyer L, Ellers J, Fartmann T, Forister ML, Furlong MJ, Garcia-Aguayo A, Gerlach J, Gols R, Goulson D, Habel JC, Haddad NM, Hallmann CA, Henriques S, Herberstein ME, Hochkirch A, Hughes AC, Jepsen S, Jones TH, Kaydan BM, Kleijn D, Klein AM, Latty T, Leather SR, Lewis SM, Lister BC, Losey JE, Lowe EC, Macadam CR, Montoya-Lerma J, Nagano CD, Ogan S, Orr MC, Painting CJ, Pham TH, Potts SG, Rauf A, Roslin TL, Samways MJ, Sanchez-Bayo F, Sar SA, Schultz CB, Soares AO, Thancharoen A, Tscharntke T, Tylianakis JM, Umbers KDL, Vet LEM, Visser ME, Vujic A, Wagner DL, WallisDeVries MF, Westphal C, White TE, Wilkins VL, Williams PH, Wyckhuys KAG, Zhu ZR, de Kroon H. International scientists formulate a roadmap for insect conservation and recovery. Nat Ecol Evol 2020; 4:174-176. [PMID: 31907382 DOI: 10.1038/s41559-019-1079-8] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jeffrey A Harvey
- Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, The Netherlands.
| | - Robin Heinen
- Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, The Netherlands
| | - Inge Armbrecht
- Departamento de Biología, Universidad del Valle, Cali, Colombia
| | - Yves Basset
- ForestGEO, Smithsonian Tropical Research Institute, Panama City, Panama
| | | | - T Martijn Bezemer
- Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, The Netherlands
| | - Monika Böhm
- Institute of Zoology, Zoological Society of London, London, UK
| | - Riccardo Bommarco
- Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Paulo A V Borges
- cE3c-Centre for Ecology, Evolution and Environmental Changes / Azorean Biodiversity Group, University of Azores, Lisbon, Portugal
| | - Pedro Cardoso
- Laboratory for Integrative Biodiversity Research (LIBRe), Finnish Museum of Natural History, University of Helsinki, Helsinki, Finland
| | | | | | | | - Marcel Dicke
- Laboratory of Entomology, Wageningen University, Wageningen, The Netherlands
| | - Klaas-Douwe B Dijkstra
- IUCN SSC Freshwater Conservation Committee, Naturalis Biodiversity Center, Leiden, The Netherlands
| | - Lee Dyer
- Biology Department, University of Nevada, Reno, NV, USA
| | - Jacintha Ellers
- Department of Ecological Sciences, Vrije University, Amsterdam, The Netherlands
| | - Thomas Fartmann
- Department of Biodiversity and Landscape Ecology, Osnabrück University, Osnabrück, Germany
| | | | - Michael J Furlong
- School of Biological Sciences, The University of Queensland, St Lucia, Queensland, Australia
| | | | - Justin Gerlach
- IUCN SSC Terrestrial Invertebrate Red List Authority, Cambridge, UK
| | - Rieta Gols
- Laboratory of Entomology, Wageningen University, Wageningen, The Netherlands
| | - Dave Goulson
- School of Life Sciences, University of Sussex, Brighton, UK
| | - Jan-Christian Habel
- Evolutionary Zoology, Department of Biosciences, University of Salzburg, Salzburg, Austria
| | - Nick M Haddad
- Kellogg Biological Station and Department of Integrative Biology, Michigan State University, Hickory Corners, MI, USA
| | - Caspar A Hallmann
- Institute for Water and Wetland Research, Radboud University, Nijmegen, The Netherlands
| | | | - Marie E Herberstein
- Department of Biological Sciences, Macquarie University, Sydney, New South Wales, Australia
| | - Axel Hochkirch
- Department of Biogeography, Trier University, Trier, Germany
| | - Alice C Hughes
- Centre for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Yunnan, China
| | - Sarina Jepsen
- The Xerces Society for Invertebrate Conservation, Portland, OR, USA
| | - T Hefin Jones
- School of Biosciences, Cardiff University, Cardiff, UK
| | - Bora M Kaydan
- Biotechnology Application and Research Centre, Çukurova University, Balcalı, Adana, Turkey
| | - David Kleijn
- Plant Ecology and Nature Conservation Group, Wageningen University, Wageningen, The Netherlands
| | | | - Tanya Latty
- School of Life and Environmental Science, Sydney Institute of Agriculture, University of Sydney, Sydney, New South Wales, Australia
| | - Simon R Leather
- Crop & Environment Science, Harper Adams University, Newport, UK
| | - Sara M Lewis
- Department of Biology, Tufts University, Medford, MA, USA
| | - Bradford C Lister
- Department of Biological Sciences, Rensselaer Polytechnic Institute, Troy, NY, USA
| | - John E Losey
- Entomology Department, Cornell University, Ithaca, NY, USA
| | - Elizabeth C Lowe
- Department of Biological Sciences, Macquarie University, Sydney, New South Wales, Australia
| | - Craig R Macadam
- Buglife - The Invertebrate Conservation Trust, Peterborough, UK
| | | | | | - Sophie Ogan
- Department of Biogeography, Trier University, Trier, Germany
| | - Michael C Orr
- Key Laboratory for Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | | | - Thai-Hong Pham
- Vietnam National Museum of Nature & Graduate School of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Simon G Potts
- Centre for Agri-Environmental Research, School of Agriculture, Policy and Development, Reading University, Reading, UK
| | - Aunu Rauf
- Department of Plant Protection, IPB University, Bogor, Indonesia
| | - Tomas L Roslin
- Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Michael J Samways
- Department of Conservation Ecology and Entomology, Stellenbosch University, Matieland, South Africa
| | | | - Sim A Sar
- National Agricultural Research Institute, Lae, Papua New Guinea
| | - Cheryl B Schultz
- School of Biological Sciences, Washington State University, Vancouver, British Columbia, USA
| | - António O Soares
- cE3c-Centre for Ecology, Evolution and Environmental Changes / Azorean Biodiversity Group, University of Azores, Lisbon, Portugal
| | - Anchana Thancharoen
- Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand
| | - Teja Tscharntke
- Agroecology, Department of Crop Sciences, University of Göttingen, Göttingen, Germany
| | - Jason M Tylianakis
- Bio-protection Centre, School of Biological Sciences, University of Canterbury, Christchurch, New Zealand
| | - Kate D L Umbers
- School of Science and Health, Western Sydney University, Penrith, New South Wales, Australia
| | - Louise E M Vet
- Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, The Netherlands
| | - Marcel E Visser
- Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, The Netherlands
| | - Ante Vujic
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia
| | - David L Wagner
- Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT, USA
| | - Michiel F WallisDeVries
- De Vlinderstichting (Dutch Butterfly Conservation) & Plant Ecology and Nature Conservation Group, Wageningen University, Wageningen, The Netherlands
| | - Catrin Westphal
- Functional Agrobiodiversity, Department of Crop Sciences, University of Göttingen, Göttingen, Germany
| | - Thomas E White
- School of Life and Environmental Science, Sydney Institute of Agriculture, University of Sydney, Sydney, New South Wales, Australia
| | - Vicky L Wilkins
- IUCN SSC Mid Atlantic Island Invertebrate Specialist Group, IUCN, Cambridge, UK
| | | | | | - Zeng-Rong Zhu
- Zhejiang Provincial Key Laboratory of Crop Insect Pests and Diseases, Hangzhou, Zhejiang, China
| | - Hans de Kroon
- Institute for Water and Wetland Research, Radboud University, Nijmegen, The Netherlands
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10
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Sanz M, del Castillo AM, Jepsen S, Gonzalez-Juanatey JR, D’Aiuto F, Bouchard P, Chapple I, Dietrich T, Gotsman I, Graziani F, Herrera D, Loos B, Madianos P, Michel JB, Perel P, Pieske B, Shapira L, Shechter M, Tonetti M, Vlachopoulos C, Wimmer G. Periodontitis and Cardiovascular Diseases. Consensus Report. Glob Heart 2020; 15:1. [PMID: 32489774 PMCID: PMC7218770 DOI: 10.5334/gh.400] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 12/20/2019] [Indexed: 12/11/2022] Open
Abstract
Background In Europe cardiovascular disease (CVD) is responsible for 3.9 million deaths (45% of deaths), being ischaemic heart disease, stroke, hypertension (leading to heart failure) the major cause of these CVD related deaths. Periodontitis is also a chronic non-communicable disease (NCD) with a high prevalence, being severe periodontitis, affecting 11.2% of the world's population, the sixth most common human disease. Material and Methods There is now a significant body of evidence to support independent associations between severe periodontitis and several NCDs, in particular CVD. In 2012 a joint workshop was held between the European Federation of Periodontology (EFP) and the American Academy of Periodontology to review the literature relating periodontitis and systemic diseases, including CVD. In the last five years important new scientific information has emerged providing important emerging evidence to support these associations. Results and Conclusions The present review reports the proceedings of the workshop jointly organised by the EFP and the World Heart Federation (WHF), which has updated the existing epidemiological evidence for significant associations between periodontitis and CVD, the mechanistic links and the impact of periodontal therapy on cardiovascular and surrogate outcomes. This review has also focused on the potential risk and complications of periodontal therapy in patients on anti thrombotic therapy and has made recommendations for dentists, physicians and for patients visiting both the dental and medical practices.
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Affiliation(s)
- M. Sanz
- Department of Dental Clinical Specialties and ETEP Research Group, Faculty of Odontology, University Complutense of Madrid, Plaza Ramon y Cajal, Madrid, ES
| | | | - S. Jepsen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, DE
| | - J. R. Gonzalez-Juanatey
- Cardiology Department, University Hospital, University of Santiago de Compostela, IDIS, CIBERCV, ES
| | - F. D’Aiuto
- Department of Periodontology, Eastman Dental Institute and Hospital, University College London, London, UK
| | - P. Bouchard
- U.F.R. d’odontologie, Université Paris Diderot, Hôpital Rothschild AP-HP, Paris, FR
| | - I. Chapple
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, The University of Birmingham, Birmingham, UK
| | - T. Dietrich
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, The University of Birmingham, Birmingham, UK
| | - I. Gotsman
- Heart Institute, Hadassah University Hospital, Jerusalem, IL
| | - F. Graziani
- Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, Pisa, IT
| | - D. Herrera
- Department of Dental Clinical Specialties and ETEP Research Group, Faculty of Odontology, University Complutense of Madrid, Plaza Ramon y Cajal, Madrid, ES
| | - B. Loos
- ACTA University, Amsterdam, NL
| | - P. Madianos
- Department of Periodontology, School of Dentistry, National and Kapodistrian University of Athens, GR
| | - J. B. Michel
- Inserm Unit 1148, laboratory for translational CV science, X. Bichat hospital, Paris, FR
| | - P. Perel
- World Heart Federation, Geneva, CH
- Centre for Global Chronic Conditions, London School of Hygiene and Tropical Medicine, UK
| | - B. Pieske
- Charité Universitätsmedizin Berlin, Department of Internal Medicine and Cardiology, Berlin, DE
- DZHK (German Center for Cardiovascular Research) Partnersite Berlin, German Heart Institut Berlin, DE
| | - L. Shapira
- Department of Periodontology, Hebrew University – Hadassah Faculty of Dental Medicine, Jerusalem, IL
| | - M. Shechter
- Leviev Heart Center, Chaim Sheba Medical Center, tel Hashomer and the Sackler Faculty of Medicine, Tel Aviv University, IL
| | - M. Tonetti
- Department of Periodontology, The University of Hong Kong, Prince Philip Dental Hospital, HK
| | - C. Vlachopoulos
- Department of Cardiology, National and Kapodistrian University of Athens, GR
| | - G. Wimmer
- Department of Prosthetic Dentistry, School of Dental Medicine, Karl-Franzens University Graz, AT
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11
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Lewis SM, Wong CH, Owens ACS, Fallon C, Jepsen S, Thancharoen A, Wu C, De Cock R, Novák M, López-Palafox T, Khoo V, Reed JM. A Global Perspective on Firefly Extinction Threats. Bioscience 2020. [DOI: 10.1093/biosci/biz157] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Insect declines and their drivers have attracted considerable recent attention. Fireflies and glowworms are iconic insects whose conspicuous bioluminescent courtship displays carry unique cultural significance, giving them economic value as ecotourist attractions. Despite evidence of declines, a comprehensive review of the conservation status and threats facing the approximately 2000 firefly species worldwide is lacking. We conducted a survey of experts from diverse geographic regions to identify the most prominent perceived threats to firefly population and species persistence. Habitat loss, light pollution, and pesticide use were regarded as the most serious threats, although rankings differed substantially across regions. Our survey results accompany a comprehensive review of current evidence concerning the impact of these stressors on firefly populations. We also discuss risk factors likely to increase the vulnerability of certain species to particular threats. Finally, we highlight the need to establish monitoring programs to track long-term population trends for at-risk firefly taxa.
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Affiliation(s)
| | | | | | - Candace Fallon
- The Xerces Society for Invertebrate Conservation, Portland, Oregon
| | - Sarina Jepsen
- The Xerces Society for Invertebrate Conservation, Portland, Oregon
| | - Anchana Thancharoen
- Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand
| | | | - Raphael De Cock
- Department of Biology's Evolutionary Ecology Research Group, University of Antwerp, Belgium
| | - Martin Novák
- Department of Ecology, Czech University of Life Sciences, Prague, Czech Republic
| | - Tania López-Palafox
- Instituto de Ecología, Universidad Nacional Autónoma de México, México City, México
| | - Veronica Khoo
- Forest Biodiversity Division of the Forest Research Institute Malaysia, Selangor, Malaysia
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12
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Freitag-Wolf S, Munz M, Wiehe R, Junge O, Graetz C, Jockel-Schneider Y, Staufenbiel I, Bruckmann C, Lieb W, Franke A, Loos B, Jepsen S, Dommisch H, Schaefer A. Smoking Modifies the Genetic Risk for Early-Onset Periodontitis. J Dent Res 2019; 98:1332-1339. [DOI: 10.1177/0022034519875443] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Periodontitis has low-prevalence, highly severe disease manifestations with an early onset and rapid progression. The diagnosis is based on severe destruction of the alveolar bone in adolescents and young adults. Genetic susceptibility variants and smoking are well-established risk factors, but their interactions in modifying disease susceptibility have not been studied. We aimed to identify genetic risk variants of early-onset periodontitis that unmask their effects on tobacco smoke exposure. To this end, we analyzed 79,780,573 common variants in 741 northwest Europeans diagnosed to have >30% bone loss at >2 teeth before 35 y of age, using imputed genotypes of the OmniExpress BeadChip. Never versus ever smokers were compared in a logistic regression analysis via a case-only approach. To explore the effect of tobacco smoke on the expression of the G×S-associated genes, cultures of primary gingival fibroblasts ( n = 9) were exposed to cigarette smoke extract, and transcripts were quantified by reverse transcription polymerase chain reaction. We identified 16 loci for which our analysis suggested an association with G×S increased disease risk ( P < 5 × 10−5). Nine loci had previously been reported to be associated with spirometric measures of pulmonary function by an earlier G×S genome-wide association study. Genome-wide significant cis expression quantitative trait loci were reported for G×S-associated single-nucleotide polymorphisms at ST8SIA1 and SOST, indicating a causal role of these genes in tobacco-related etiopathology. Notably, SOST is a negative regulator of bone growth, and ST8SIA1 has a role in tissue remodeling. Cigarette smoke extract significantly altered the expression of 2 associated genes: SSH1 ( P = 5 × 10−07), which is required for NF-κB activation and innate immune responses to bacterial invasion, and ST8SIA1 ( P = 0.0048). We conclude that the genetic predisposition to early-onset periodontitis is in part triggered by smoking and that tobacco smoke directly affects the expression of genes involved in bone homeostasis, tissue repair, and immune response.
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Affiliation(s)
- S. Freitag-Wolf
- Institute of Medical Informatics and Statistics, University Hospital Schleswig-Holstein, Kiel University, Germany
| | - M. Munz
- Department of Periodontology and Synoptic Dentistry, Institute for Dental and Craniofacial Sciences, Berlin Institute of Health, Charité–University Medicine Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- Institute for Cardiogenetics, University of Lübeck, Lübeck, Germany
| | - R. Wiehe
- Department of Periodontology and Synoptic Dentistry, Institute for Dental and Craniofacial Sciences, Berlin Institute of Health, Charité–University Medicine Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - O. Junge
- Institute of Medical Informatics and Statistics, University Hospital Schleswig-Holstein, Kiel University, Germany
| | - C. Graetz
- Unit of Periodontology, Department of Conservative Dentistry, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Y. Jockel-Schneider
- Clinic of Preventive Dentistry and Periodontology, Department of Periodontology, University Medical Center of the Julius-Maximilians-University, Würzburg, Germany
| | - I. Staufenbiel
- Periodontology and Preventive Dentistry, Department of Conservative Dentistry, Hannover Medical School, Hannover, Germany
| | - C. Bruckmann
- Department of Conservative Dentistry and Periodontology, School of Dentistry, Medical University Vienna, Vienna, Austria
| | - W. Lieb
- Institute of Epidemiology, Christian-Albrechts-University, Kiel, Germany
| | - A. Franke
- Institute of Clinical Molecular Biology, Christian-Albrechts-University, Kiel, Germany
| | - B.G. Loos
- Department of Periodontology and Oral Biochemistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - S. Jepsen
- Operative and Preventive Dentistry, Department of Periodontology, University of Bonn, Bonn, Germany
| | - H. Dommisch
- Department of Periodontology and Synoptic Dentistry, Institute for Dental and Craniofacial Sciences, Berlin Institute of Health, Charité–University Medicine Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - A.S. Schaefer
- Department of Periodontology and Synoptic Dentistry, Institute for Dental and Craniofacial Sciences, Berlin Institute of Health, Charité–University Medicine Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
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13
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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14
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Hoppe T, Göser V, Kraus D, Probstmeier R, Frentzen M, Wenghoefer M, Jepsen S, Winter J. Response of MG63 osteoblasts on bacterial challenge is dependent on the state of differentiation. Mol Oral Microbiol 2017; 33:133-142. [DOI: 10.1111/omi.12203] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/05/2017] [Indexed: 01/15/2023]
Affiliation(s)
- T. Hoppe
- Department of Periodontology, Operative and Preventive Dentistry; University of Bonn; Bonn Germany
| | - V. Göser
- Department of Periodontology, Operative and Preventive Dentistry; University of Bonn; Bonn Germany
| | - D. Kraus
- Department of Prosthodontics, Preclinical Education and Dental Materials Sciences; University of Bonn; Bonn Germany
| | - R. Probstmeier
- Department of Nuclear Medicine; Neuro- and Tumor Cell Biology Group; University of Bonn; Bonn Germany
| | - M. Frentzen
- Department of Periodontology, Operative and Preventive Dentistry; University of Bonn; Bonn Germany
| | - M. Wenghoefer
- Department of Oral & Maxillofacial Plastic Surgery; 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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15
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Blevins E, Jepsen S, Box JB, Nez D, Howard J, Maine A, O'Brien C. Extinction Risk of Western North American Freshwater Mussels: Anodonta Nuttalliana, the Anodonta Oregonensis/Kennerlyi Clade, Gonidea Angulata, and Margaritifera Falcata. ACTA ACUST UNITED AC 2017. [DOI: 10.31931/fmbc.v20i2.2017.71-88] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Emilie Blevins
- Xerces Society for Invertebrate Conservation, 628 NE Broadway Suite 200, Portland, OR 97232 USA
| | - Sarina Jepsen
- Xerces Society for Invertebrate Conservation, 628 NE Broadway Suite 200, Portland, OR 97232 USA
| | - Jayne Brim Box
- Confederated Tribes of the Umatilla Indian Reservation, Department of Natural Resources, Fisheries P
| | - Donna Nez
- Confederated Tribes of the Umatilla Indian Reservation, Department of Natural Resources, Fisheries P
| | - Jeanette Howard
- The Nature Conservancy, 201 Mission Street, 4th Floor, San Francisco, CA 94105 USA
| | - Alexa Maine
- Confederated Tribes of the Umatilla Indian Reservation, Department of Natural Resources, Fisheries P
| | - Christine O'Brien
- Browns River Consultants, LLC, 130 Sesame Street, Waynesville, NC 28785 USA
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16
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Shusterman A, Munz M, Richter G, Jepsen S, Lieb W, Krone B, Hoffman P, Laudes M, Wellmann J, Berger K, Kocher T, Offenbacher S, Divaris K, Franke A, Schreiber S, Dommisch H, Weiss E, Schaefer AS, Houri-Haddad Y, Iraqi FA. The PF4/PPBP/CXCL5 Gene Cluster Is Associated with Periodontitis. J Dent Res 2017; 96:945-952. [PMID: 28467728 DOI: 10.1177/0022034517706311] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Periodontitis is a common dysbiotic inflammatory disease with an estimated heritability of 50%. Due to the limited sample size of available periodontitis cohorts and the underlying trait heterogeneity, genome-wide association studies (GWAS) of chronic periodontitis (CP) have been unsuccessful in discovering susceptibility factors. A strategy that combines agnostic GWAS with a well-powered candidate-gene approach has the potential to discover novel loci. We combined RNA-seq data from gingival tissues with quantitative trait loci (QTLs) that were identified in a F2-cross of mice resistant and susceptible to infection with oral bacterial pathogens. Four genes, which were located within the mapped QTLs, showed differential expression. The chromosomal regions across the human orthologous were interrogated for putative periodontitis-associated variants using existing GWAS data from a German case-control sample of aggressive periodontitis (AgP; 651 cases, 4,001 controls), the most severe and early onset form of periodontitis. Two haplotype blocks, one upstream to the coding region of UGT2A1 (rs146712414, P = 9.1 × 10-5; odds ratio [OR], 1.34; 95% confidence interval [CI], 1.16-1.56) and one downstream of the genes PF4/PPBP/CXCL5 (rs1595009, P = 1.3 × 10-4; OR, 1.32; 95% CI, 1.15-1.52), were associated with AgP. The association of rs1595009 was validated in an independent cohort of CP of European Americans (1,961 cases and 1,864 controls; P = 0.03; OR, 1.45; 95% CI, 1.01-1.29). This association was further replicated in another sample of 399 German CP cases (disease onset <60 y of age) and 1,633 controls ( P = 0.03; OR, 1.75; 95% CI, 1.06-2.90). The combined estimates of association from all samples were P = 2.9 × 10-5 (OR, 1.2; 95% CI, 1.1-1.3). This study shows the strength of combining QTL mapping and RNA-Seq data from a mouse model with association studies in human case-control samples to identify genetic risk variants of periodontitis.
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Affiliation(s)
- A Shusterman
- 1 Department of Prosthodontics, Hadassah Faculty of Dental Medicine, Hebrew University, Jerusalem, Israel
| | - M Munz
- 2 Department of Periodontology and Synoptic Medicine, Institute for Dental and Craniofacial Sciences, Charité-University Medicine Berlin, Berlin, Germany
- 3 Institute for Integrative and Experimental Genomics, University Medical Center Schleswig-Holstein-Campus Lübeck, Lübeck, Germany
| | - G Richter
- 2 Department of Periodontology and Synoptic Medicine, Institute for Dental and Craniofacial Sciences, Charité-University Medicine Berlin, Berlin, Germany
| | - S Jepsen
- 4 Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - W Lieb
- 5 Institute of Epidemiology, Biobank popgen, Christian-Albrechts-University, Kiel, Germany
| | - B Krone
- 6 Institute of Medical Informatics, Biometry and Epidemiology, University Clinic Essen, Essen, Germany
| | - P Hoffman
- 7 Institute of Human Genetics, University of Bonn, Bonn, Germany
- 8 Germany und Human Genomics Research Group, Department of Biomedicine, University Hospital of Basel, Basel, Switzerland
| | - M Laudes
- 9 Clinic of Internal Medicine, University Clinic Schleswig-Holstein, Kiel, Germany
| | - J Wellmann
- 10 Institute of Epidemiology and Social Medicine, University of Münster, Münster, Germany
| | - K Berger
- 10 Institute of Epidemiology and Social Medicine, University of Münster, Münster, Germany
| | - T Kocher
- 11 Unit of Periodontology, Department of Restorative Dentistry, Periodontology, Endodontology, Preventive Dentistry and Pedodontics, Dental School, University Medicine Greifswald, Greifswald, Germany
| | - S Offenbacher
- 12 University of North Carolina-Chapel Hill, School of Dentistry, Department of Periodontology, Chapel Hill, NC, USA
| | - K Divaris
- 13 University of North Carolina-Chapel Hill, School of Dentistry, Department of Pediatric Dentistry, Chapel Hill, NC, USA
- 14 University of North Carolina-Chapel Hill, Gillings School of Global Public Health, Department of Epidemiology, Chapel Hill, NC, USA
| | - A Franke
- 15 Institute of Clinical Molecular Biology, Christian-Albrechts-University, Kiel, Germany
| | - S Schreiber
- 9 Clinic of Internal Medicine, University Clinic Schleswig-Holstein, Kiel, Germany
- 15 Institute of Clinical Molecular Biology, Christian-Albrechts-University, Kiel, Germany
| | - H Dommisch
- 2 Department of Periodontology and Synoptic Medicine, Institute for Dental and Craniofacial Sciences, Charité-University Medicine Berlin, Berlin, Germany
| | - E Weiss
- 16 Maurice and Gabriella Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - A S Schaefer
- 2 Department of Periodontology and Synoptic Medicine, Institute for Dental and Craniofacial Sciences, Charité-University Medicine Berlin, Berlin, Germany
| | - Y Houri-Haddad
- 1 Department of Prosthodontics, Hadassah Faculty of Dental Medicine, Hebrew University, Jerusalem, Israel
| | - F A Iraqi
- 17 Department of Clinical Microbiology and Immunology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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17
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Brown MJF, Dicks LV, Paxton RJ, Baldock KCR, Barron AB, Chauzat MP, Freitas BM, Goulson D, Jepsen S, Kremen C, Li J, Neumann P, Pattemore DE, Potts SG, Schweiger O, Seymour CL, Stout JC. A horizon scan of future threats and opportunities for pollinators and pollination. PeerJ 2016; 4:e2249. [PMID: 27602260 PMCID: PMC4991895 DOI: 10.7717/peerj.2249] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 06/22/2016] [Indexed: 01/25/2023] Open
Abstract
Background. Pollinators, which provide the agriculturally and ecologically essential service of pollination, are under threat at a global scale. Habitat loss and homogenisation, pesticides, parasites and pathogens, invasive species, and climate change have been identified as past and current threats to pollinators. Actions to mitigate these threats, e.g., agri-environment schemes and pesticide-use moratoriums, exist, but have largely been applied post-hoc. However, future sustainability of pollinators and the service they provide requires anticipation of potential threats and opportunities before they occur, enabling timely implementation of policy and practice to prevent, rather than mitigate, further pollinator declines. Methods.Using a horizon scanning approach we identified issues that are likely to impact pollinators, either positively or negatively, over the coming three decades. Results.Our analysis highlights six high priority, and nine secondary issues. High priorities are: (1) corporate control of global agriculture, (2) novel systemic pesticides, (3) novel RNA viruses, (4) the development of new managed pollinators, (5) more frequent heatwaves and drought under climate change, and (6) the potential positive impact of reduced chemical use on pollinators in non-agricultural settings. Discussion. While current pollinator management approaches are largely driven by mitigating past impacts, we present opportunities for pre-emptive practice, legislation, and policy to sustainably manage pollinators for future generations.
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Affiliation(s)
- Mark J F Brown
- School of Biological Sciences, Royal Holloway University of London , Egham , United Kingdom
| | - Lynn V Dicks
- Conservation Science Group, Department of Zoology, University of Cambridge , Cambridge , United Kingdom
| | - Robert J Paxton
- Institute for Biology, Martin-Luther-University Halle-Wittenberg, Halle, Germany; iDiv, German Centre for Integrative Biodiversity Research Halle-Jena-Leipzig, Leipzig, Germany
| | - Katherine C R Baldock
- School of Biological Sciences, University of Bristol, Bristol, United Kingdom; Cabot Institute, University of Bristol, Bristol, United Kingdom
| | - Andrew B Barron
- Department of Biological Sciences, Macquarie University , Sydney , Australia
| | - Marie-Pierre Chauzat
- European reference laboratory for honeybee health, Unit of honeybee pathology & Unit of coordination and support to surveillance, ANSES , Maisons-Alfort Cedex , France
| | - Breno M Freitas
- Departamento de Zootecnia, Centro de Ciências Agrárias, Universidade Federal do Ceará , Fortaleza Ceará , Brazil
| | - Dave Goulson
- School of Life Sciences, University of Sussex , Falmer , United Kingdom
| | - Sarina Jepsen
- The Xerces Society for Invertebrate Conservation , Portland , OR , United States of America
| | - Claire Kremen
- Berkeley Food Institute, Environmental Sciences Policy and Management, University of California Berkeley , Berkeley , CA , United States of America
| | - Jilian Li
- Institute of Apicultural Research, Chinese Academy of Agricultural Sciences , Beijing , China
| | - Peter Neumann
- Institute of Bee Health, Vetsuisse Faculty, University of Bern , Bern , Switzerland
| | - David E Pattemore
- The New Zealand Institute for Plant & Food Research Limited , Hamilton , New Zealand
| | - Simon G Potts
- Centre for Agri-Environmental Research, School of Agriculture, Policy and Development, University of Reading , Reading , United Kingdom
| | - Oliver Schweiger
- Department of Community Ecology, Helmholtz Centre for Environmental Research-UFZ , Halle , Germany
| | - Colleen L Seymour
- South African National Biodiversity Institute, Kirstenbosch Research Centre, Claremont, South Africa; Percy FitzPatrick Institute of African Ornithology, DST/NRF Centre of Excellence, Department of Biological Sciences, University of Cape Town, Rondebosch, South Africa
| | - Jane C Stout
- Botany, School of Natural Sciences, Trinity College Dublin, the University of Dublin , Dublin , Ireland
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Hoppe T, Kraus D, Novak N, Probstmeier R, Frentzen M, Wenghoefer M, Jepsen S, Winter J. Oral pathogens change proliferation properties of oral tumor cells by affecting gene expression of human defensins. Tumour Biol 2016; 37:13789-13798. [PMID: 27481514 DOI: 10.1007/s13277-016-5281-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 07/15/2016] [Indexed: 02/08/2023] Open
Abstract
The impact of oral pathogens onto the generation and variability of oral tumors has only recently been investigated. To get further insights, oral cancer cells were treated with pathogens and additionally, as a result of this bacterial cellular infection, with human defensins, which are as anti-microbial peptide members of the innate immune system. After cell stimulation, proliferation behavior, expression analysis of oncogenic relevant defensin genes, and effects on EGFR signaling were investigated. The expression of oncogenic relevant anti-microbial peptides was analyzed with real-time PCR and immunohistochemistry. Cell culture experiments were performed to examine cellular impacts caused by stimulation, i.e., altered gene expression, proliferation rate, and EGF receptor-dependent signaling. Incubation of oral tumor cells with an oral pathogen (Porphyromonas gingivalis) and human α-defensins led to an increase in cell proliferation. In contrast, another oral bacterium used, Aggregatibacter actinomycetemcomitans, enhanced cell death. The bacteria and anti-microbial peptides exhibited diverse effects on the transcript levels of oncogenic relevant defensin genes and epidermal growth factor receptor signaling. These two oral pathogens exhibited opposite primary effects on the proliferation behavior of oral tumor cells. Nevertheless, both microbe species led to similar secondary impacts on the proliferation rate by modifying expression levels of oncogenic relevant α-defensin genes. In this respect, oral pathogens exerted multiplying effects on tumor cell proliferation. Additionally, human defensins were shown to differently influence epidermal growth factor receptor signaling, supporting the hypothesis that these anti-microbial peptides serve as ligands of EGFR, thus modifying the proliferation behavior of oral tumor cells.
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Affiliation(s)
- T Hoppe
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany
| | - D Kraus
- Department of Prosthodontics, Preclinical Education, and Material Science, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany
| | - N Novak
- Department of Dermatology and Allergy, University Hospital Bonn, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany
| | - R Probstmeier
- Neuro- and Tumor Cell Biology Group, Department of Nuclear Medicine, University Hospital Bonn, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany
| | - M Frentzen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany
| | - M Wenghoefer
- Department of Oral and Maxillofacial Plastic Surgery, University Hospital Bonn, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany
| | - S Jepsen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany
| | - J Winter
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany.
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Lozier JD, Cameron SA, Duennes MA, Strange JP, Williams PH, Goulson D, Brown MJF, Morales C, Jepsen S. Relocation risky for bumblebee colonies. Science 2015; 350:286-7. [PMID: 26472900 DOI: 10.1126/science.350.6258.286-b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Jeffrey D Lozier
- Department of Biological Sciences, University of Alabama, Tuscaloosa, AL 35487, USA.
| | - Sydney A Cameron
- Department of Entomology, University of Illinois, Urbana, IL 61801, USA
| | | | - James P Strange
- USDA-ARS, Pollinating Insect Research Unit, Utah State University, Logan, UT 84322, USA
| | - Paul H Williams
- Department of Life Sciences, Natural History Museum, London, SW7 5BD, UK
| | - David Goulson
- Evolution, Behaviour, and Environment, School of Life Sciences, University of Sussex, Falmer, East Sussex, BN1 9QG, UK
| | - Mark J F Brown
- School of Biological Sciences, Royal Holloway University of London, Egham, TW20 0EX, UK
| | - Carolina Morales
- Laboratorio Ecotono, INIBIOMA (Universidad Nacional del Comahue-CONICET), Bariloche, Rio Negro, Argentina
| | - Sarina Jepsen
- The Xerces Society for Invertebrate Conservation, Portland, OR 97232, USA
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20
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Jepsen K, Jepsen S, Laine M, Anssari Moin D, Pilloni A, Zeza B, Sanz M, Ortiz-Vigon A, Roos-Jansåker A, Renvert S. Reconstruction of Peri-implant Osseous Defects. J Dent Res 2015; 95:58-66. [DOI: 10.1177/0022034515610056] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
There is a paucity of data for the effectiveness of reconstructive procedures in the treatment of peri-implantitis. The objective of this study was to compare reconstruction of peri-implant osseous defects with open flap debridement (OFD) plus porous titanium granules (PTGs) compared with OFD alone. Sixty-three patients (36 female, 27 male; mean age 58.4 y [SD 12.3]), contributing one circumferential peri-implant intraosseous defect, were included in a multinational, multicenter randomized trial using a parallel-group design. After OFD and surface decontamination using titanium brushes and hydrogen peroxide, 33 defects received PTGs. The implants were not submerged. All patients received adjunctive perioperative systemic antibiotics. The primary outcome variable (defect fill) was assessed on digitalized radiographs. Clinical measurements of probing depth (PPD), bleeding on probing (BoP), suppuration, and plaque were taken by blinded examiners. After 12 mo, the test group (OFD plus PTG) showed a mean radiographic defect fill (mesial/distal) of 3.6/3.6 mm compared with 1.1/1.0 in the control group (OFD). Differences were statistically significant in favor of the test group ( P < 0.0001). The OFD plus PTG group showed a mean reduction in PPD of 2.8 mm compared with 2.6 mm in the OFD group. BoP was reduced from 89.4% to 33.3% and from 85.8% to 40.4% for the test and control groups, respectively. There was no significant difference in complete resolution of peri-implantitis (PPD ≤4 mm and no BoP at six implant sites and no further bone loss), because this finding was accomplished at 30% of implants in the test group and 23% of implants in the control group. Reconstructive surgery using PTGs resulted in significantly enhanced radiographic defect fill compared with OFD. However, limitations in the lack of ability to discern biomaterial from osseous tissue could not be verified to determine new bone formation. Similar improvements according to clinical measures were obtained after both surgical treatment modalities (ClinicalTrials.gov NCT02406001).
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Affiliation(s)
- K. Jepsen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - S. Jepsen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - M.L. Laine
- Department of Periodontology, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University, Amsterdam, The Netherlands
| | - D. Anssari Moin
- Department of Periodontology, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University, Amsterdam, The Netherlands
| | - A. Pilloni
- Section of Periodontics, University of Rome, Sapienza, Italy
| | - B. Zeza
- Section of Periodontics, University of Rome, Sapienza, Italy
| | - M. Sanz
- ETEP (Etiology and Therapy of Periodontal Diseases) Research Group, University Complutense, Madrid, Spain
| | - A. Ortiz-Vigon
- ETEP (Etiology and Therapy of Periodontal Diseases) Research Group, University Complutense, Madrid, Spain
| | - A.M. Roos-Jansåker
- Department of Periodontology, Public Dental Health Service,
Kristianstad, Sweden
- Department of Oral Sciences, Kristianstad University, Kristianstad, Sweden
| | - S. Renvert
- Department of Periodontology, Public Dental Health Service,
Kristianstad, Sweden
- Department of Oral Sciences, Kristianstad University, Kristianstad, Sweden
- Blekinge Institute of Technology, Karlskrona, Sweden
- School of Dental Sciences, Trinity College, Dublin, Ireland
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Dommisch H, Staufenbiel I, Schulze K, Stiesch M, Winkel A, Fimmers R, Dommisch J, Jepsen S, Miosge N, Adam K, Eberhard J. Expression of antimicrobial peptides and interleukin-8 during early stages of inflammation: An experimental gingivitis study. J Periodontal Res 2015; 50:836-45. [DOI: 10.1111/jre.12271] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/02/2015] [Indexed: 11/28/2022]
Affiliation(s)
- H. Dommisch
- Department of Periodontology and Synoptic Dentistry; Charité - University Medicine Berlin; Berlin Germany
- Department of Oral Health Sciences; Health Science Center; University of Washington; Seattle WA USA
- Department of Periodontology, Operative and Preventive Dentistry; University Hospital Bonn; Bonn Germany
| | - I. Staufenbiel
- Department of Conservative Dentistry, Periodontology and Preventive Dentistry; Hannover Medical School; Hannover Germany
| | - K. Schulze
- Clinic for Dental Prosthetics and Biomedical Materials Science; Hannover Medical School; Hannover Germany
| | - M. Stiesch
- Clinic for Dental Prosthetics and Biomedical Materials Science; Hannover Medical School; Hannover Germany
| | - A. Winkel
- Clinic for Dental Prosthetics and Biomedical Materials Science; Hannover Medical School; Hannover Germany
| | - R. Fimmers
- Institute of Medical Biometry; Informatics and Epidemiology; University of Bonn; Bonn Germany
| | - J. Dommisch
- Department of Periodontology, Operative and Preventive Dentistry; University Hospital Bonn; Bonn Germany
| | - S. Jepsen
- Department of Periodontology, Operative and Preventive Dentistry; University Hospital Bonn; Bonn Germany
| | - N. Miosge
- Research Group for Oral Biology and Tissue Regeneration; Department of Prosthetic Dentistry; University Hospital Göttingen; Göttingen Germany
| | - K. Adam
- Clinic for Dental Prosthetics and Biomedical Materials Science; Hannover Medical School; Hannover Germany
| | - J. Eberhard
- Clinic for Dental Prosthetics and Biomedical Materials Science; Hannover Medical School; Hannover Germany
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Dommisch H, Chung WO, Plötz S, Jepsen S. Influence of histamine on the expression of CCL20 in human gingival fibroblasts. J Periodontal Res 2015; 50:786-92. [DOI: 10.1111/jre.12265] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/15/2015] [Indexed: 01/02/2023]
Affiliation(s)
- H. Dommisch
- Department of Periodontology and Synoptic Dentistry; Charité - University Medicine Berlin; Berlin Germany
- Department of Oral Health Sciences; Health Science Center; University of Washington; Seattle WA USA
- Department of Periodontology, Operative and Preventive Dentistry; University Hospital Bonn; Bonn Germany
| | - W. O. Chung
- Department of Oral Health Sciences; Health Science Center; University of Washington; Seattle WA USA
| | - S. Plötz
- Department of Periodontology, Operative and Preventive Dentistry; University Hospital Bonn; Bonn Germany
| | - S. Jepsen
- Department of Periodontology, Operative and Preventive Dentistry; University Hospital Bonn; Bonn Germany
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23
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Dommisch H, Winter J, Götz W, Miesen J, Klein A, Hierse L, Deschner J, Jäger A, Eberhard J, Jepsen S. Effect of growth factors on antimicrobial peptides and pro-inflammatory mediators during wound healing. Clin Oral Investig 2014; 19:209-20. [DOI: 10.1007/s00784-014-1239-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Accepted: 03/25/2014] [Indexed: 12/26/2022]
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Mattheos N, de Bruyn H, Hultin M, Jepsen S, Klinge B, Koole S, Sanz M, Ucer C, Lang NP. Developing implant dentistry education in Europe: the continuum from undergraduate to postgraduate education and continuing professional development. Eur J Dent Educ 2014; 18 Suppl 1:3-10. [PMID: 24484515 DOI: 10.1111/eje.12075] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/07/2013] [Indexed: 06/03/2023]
Abstract
INTRODUCTION Implant dentistry is a treatment modality which has mainstream clinical practice of comprehensive care, which however is not adequately represented in the undergraduate dental curricula. A consensus workshop organised by ADEE in 2008, set the benchmarks for the knowledge and competences a modern dental practitioner must possess with regard to implant dentistry, as well as defined undergraduate and postgraduate pathways for the acquisition of these competences. Today, 5 years later, there exist several challenges for the implementation of these benchmarks in both undergraduate curricula but also post-graduation educational pathways. METHODS A consensus workshop was organised by ADEE, bringing together 48 opinion leaders, including academic teachers of all disciplines related to implant dentistry, specialists, representatives of relevant scientific and professional associations, as well as industry delegates. The objectives of the workshop were to evaluate the existing scientific literature, reported experience and best practices in order to identify potential and limitations for the implementation of implant dentistry in the undergraduate curriculum, as well produce recommendations for the optimal educational structures for postgraduate programmes and continuing professional development. RESULTS The scientific committee conducted two European-wide questionnaire surveys to better document the current state of education in implant dentistry. Upon completion of the surveys, reviewers were appointed to produce three scientific review papers, identifying current achievements and future challenges. Finally, during the 3 days of the workshop, all the evidence was reviewed and the main conclusions and recommendations that were adopted by all participants are reported in the present Consensus Paper. CONCLUSIONS Implementation of implant dentistry in the undergraduate curriculum has improved significantly, but still lags behind the benchmarks set in 2008 and the diversity between institutions remains big. At the post-graduation level, there is currently a wide diversity of courses and pathways towards competences related to implant dentistry and there is at present a great need for quality assurance, as well as standardisation and transparency of the learning outcomes.
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Affiliation(s)
- N Mattheos
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, China
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25
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Enkling N, Jöhren P, Katsoulis J, Bayer S, Jervøe-Storm PM, Mericske-Stern R, Jepsen S. Influence of platform switching on bone-level alterations: a three-year randomized clinical trial. J Dent Res 2013; 92:139S-45S. [PMID: 24158333 DOI: 10.1177/0022034513504953] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The concept of platform switching has been introduced to implant dentistry based on clinical observations of reduced peri-implant crestal bone loss. However, published data are controversial, and most studies are limited to 12 months. The aim of the present randomized clinical trial was to test the hypothesis that platform switching has a positive impact on crestal bone-level changes after 3 years. Two implants with a diameter of 4 mm were inserted crestally in the posterior mandible of 25 patients. The intraindividual allocation of platform switching (3.3-mm platform) and the standard implant (4-mm platform) was randomized. After 3 months of submerged healing, single-tooth crowns were cemented. Patients were followed up at short intervals for monitoring of healing and oral hygiene. Statistical analysis for the influence of time and platform type on bone levels employed the Brunner-Langer model. At 3 years, the mean radiographic peri-implant bone loss was 0.69 ± 0.43 mm (platform switching) and 0.74 ± 0.57 mm (standard platform). The mean intraindividual difference was 0.05 ± 0.58 mm (95% confidence interval: -0.19, 0.29). Crestal bone-level alteration depended on time (p < .001) but not on platform type (p = .363). The present randomized clinical trial could not confirm the hypothesis of a reduced peri-implant crestal bone loss, when implants had been restored according to the concept of platform switching.
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Affiliation(s)
- N Enkling
- Department of Prosthodontics, University of Berne, Switzerland
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26
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Winter J, Mohr S, Pantelis A, Kraus D, Allam JP, Novak N, Reich R, Martini M, Jepsen S, Götz W, Wenghoefer M. IGF-1 deficiency in combination with a low basic hBD-2 and hBD-3 gene expression might counteract malignant transformation in pleomorphic adenomas in vitro. Cancer Invest 2012; 30:106-13. [PMID: 22250586 DOI: 10.3109/07357907.2011.640651] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This study investigated the IGF-1-influence on oncological relevant genes in pleomorphic adenomas. Therefore A64-tumor cells were stimulated by recombinant IGF-1. After RNA-extraction, transcript levels of hBD-1, hBD-2, hBD-3, DEFA1/3, DEFA4, S100A4, Psoriasin, DOC-1, EGF, EGFR, and IGFR were analyzed by qRT-PCR at t = 0, 4, 8, 24, 48, and 72 hr. The gene-products were visualized by immunostaining. A64-tumor-cells were deficient for hBD-1 and IGF-1. IGF-1 downregulates hBD-2 and hBD-3 without influencing hBD-1-expression. IGF-1 only slightly affects DEFA1/3-, DEFA4-, S100A4-, Psoriasin-, DOC-1-, EGF-, EGFR-, and IGFR-gene-expression. IGF-1-deficiency combined with low basic hBD-2-gene-expression and hBD-3-gene-expression might counteract, whereas hBD-1-deficiency promotes malignant transformation in pleomorphic adenomas.
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Affiliation(s)
- J Winter
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Welschnonnenstr, Bonn, Germany
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27
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Jepsen S, Kebschull M, Deschner J. [Relationship between periodontitis and systemic diseases]. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2012; 54:1089-96. [PMID: 21887624 DOI: 10.1007/s00103-011-1348-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Periodontitis is a biofilm-induced inflammatory disease affecting the periodontium with a high and even increasing prevalence in the German population. During recent years, there is emerging evidence for systemic effects of a periodontal infection, in particular in relation to diabetes and atherosclerosis. There is a bi-directional relationship between periodontitis and diabetes. Diabetes promotes the occurrence, the progression, and the severity of periodontitis. The periodontal infection complicates the glycemic control in diabetes, increases the risk of diabetes-associated complications and possibly even of its onset. As a consequence, the treatment of periodontal infections should become an integral part of the management of diabetes, whereas glycemic control is a prerequisite for successful periodontal therapy. Periodontal infections are considered as independent risk factor for atherosclerosis and their clinical sequelae, e.g., cerebro- and cardiovascular diseases. The positive association is only moderate, however remarkably consistent. Periodontal therapy can result in positive effects on subclinical markers of atherosclerosis.
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Affiliation(s)
- S Jepsen
- Poliklinik für Parodontologie, Zahnerhaltung und Präventive Zahnheilkunde, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Deutschland.
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Abstract
Periodontitis is a common chronic inflammatory disease characterised by destruction of the supporting structures of the teeth (the periodontal ligament and alveolar bone). It is highly prevalent (severe periodontitis affects 10-15% of adults) and has multiple negative impacts on quality of life. Epidemiological data confirm that diabetes is a major risk factor for periodontitis; susceptibility to periodontitis is increased by approximately threefold in people with diabetes. There is a clear relationship between degree of hyperglycaemia and severity of periodontitis. The mechanisms that underpin the links between these two conditions are not completely understood, but involve aspects of immune functioning, neutrophil activity, and cytokine biology. There is emerging evidence to support the existence of a two-way relationship between diabetes and periodontitis, with diabetes increasing the risk for periodontitis, and periodontal inflammation negatively affecting glycaemic control. Incidences of macroalbuminuria and end-stage renal disease are increased twofold and threefold, respectively, in diabetic individuals who also have severe periodontitis compared to diabetic individuals without severe periodontitis. Furthermore, the risk of cardiorenal mortality (ischaemic heart disease and diabetic nephropathy combined) is three times higher in diabetic people with severe periodontitis than in diabetic people without severe periodontitis. Treatment of periodontitis is associated with HbA(1c) reductions of approximately 0.4%. Oral and periodontal health should be promoted as integral components of diabetes management.
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Affiliation(s)
- P M Preshaw
- School of Dental Sciences and Institute of Cellular Medicine, Newcastle University, Framlington Place, Newcastle upon Tyne, NE2 4BW, UK.
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Konermann A, Beyer M, Deschner J, Allam JP, Novak N, Winter J, Jepsen S, Jäger A. Human periodontal ligament cells facilitate leukocyte recruitment and are influenced in their immunomodulatory function by Th17 cytokine release. Cell Immunol 2012; 272:137-43. [PMID: 22119482 DOI: 10.1016/j.cellimm.2011.10.020] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Revised: 08/18/2011] [Accepted: 10/24/2011] [Indexed: 12/12/2022]
Abstract
The objective of this in vitro study was to examine the immunomodulatory impact of human periodontal ligament (PDL) cells on the nature and magnitude of the leukocyte infiltrate in periodontal inflammation, particularly with regard to Th17 cells. PDL cells were challenged with pro-inflammatory cytokines (IL-1ß, IL-17A, and IFN-γ) and analyzed for the expression of cytokines involved in periodontal immunoinflammatory processes (IL-6, MIP-3 alpha, IL-23A, TGFß1, IDO, and CD274). In order to further investigate a direct involvement of PDL cells in leukocyte function, co-culture experiments were conducted. The expression of the immunomodulatory cytokines studied was significantly increased under pro-inflammatory conditions in PDL cells. Although PDL cells did not stimulate leukocyte proliferation or Th17 differentiation, these cells induced the recruitment of leukocytes. The results of our study suggest that PDL cells might be involved in chronic inflammatory mechanisms in periodontal tissues and thus in the transition to an adaptive immune response in periodontitis.
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Affiliation(s)
- A Konermann
- Department of Orthodontics, University of Bonn, Welschnonnenstr. 17, D-53111 Bonn, Germany
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Kraus D, Deschner J, Jäger A, Wenghoefer M, Bayer S, Jepsen S, Allam JP, Novak N, Meyer R, Winter J. Human β-defensins differently affect proliferation, differentiation, and mineralization of osteoblast-like MG63 cells. J Cell Physiol 2011; 227:994-1003. [DOI: 10.1002/jcp.22808] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Konermann A, Deschner J, Allam JP, Novak N, Winter J, Baader SL, Jepsen S, Jäger A. Antigen-presenting cell marker expression and phagocytotic activity in periodontal ligament cells. J Oral Pathol Med 2011; 41:340-7. [DOI: 10.1111/j.1600-0714.2011.01086.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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32
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Deschner J, Haak T, Jepsen S, Kocher T, Mehnert H, Meyle J, Schumm-Draeger PM, Tschöpe D. [Diabetes mellitus and periodontitis. Bidirectional relationship and clinical implications. A consensus document]. Internist (Berl) 2011; 52:466-77. [PMID: 21437707 DOI: 10.1007/s00108-011-2835-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Diabetes and periodontitis are chronic diseases with an increasing prevalence in the German population. There is a bi-directional relationship between both diseases. Diabetes promotes the occurrence, the progression and the severity of periodontitis. Periodontitis complicates the glycemic control of diabetes, increases the risk of diabetes-associated complications and possibly even of its onset. In view of the existing evidence, that is still not sufficiently communicated within the medical community, an expert panel consisting of four diabetologists and four periodontists has addressed the following questions: What is the effect of diabetes mellitus on periodontitis and on periodontal therapy? What is the effect of periodontitis on diabetes mellitus? What are the practical consequences, that result for interdisciplinary treatment strategies? The treatment of periodontal infections should become an integral part of the management of diabetes, whereas glycemic control is a prerequisite for successful periodontal therapy.
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Affiliation(s)
- J Deschner
- Poliklinik für Parodontologie, Zahnerhaltung und Präventive Zahnheilkunde, Universitätsklinikum Bonn
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33
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Nokhbehsaim M, Deschner B, Winter J, Bourauel C, Rath B, Jäger A, Jepsen S, Deschner J. Interactions of regenerative, inflammatory and biomechanical signals on bone morphogenetic protein-2 in periodontal ligament cells. J Periodontal Res 2011; 46:374-81. [PMID: 21410703 DOI: 10.1111/j.1600-0765.2011.01357.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND AND OBJECTIVE Regeneration of periodontal tissues by EMD remains a major challenge because a number of modifying factors are as yet unknown. The effects of EMD seem to be mediated, at least in part, by bone morphogenetic protein-2 (BMP-2). This in vitro study was performed to examine whether the effects of EMD on BMP-2 activity are modulated by inflammatory and/or biomechanical signals. MATERIAL AND METHODS Periodontal ligament cells were seeded on BioFlex(®) plates and exposed to EMD under normal, inflammatory or biomechanical loading conditions for 1 and 6 d. In order to mimic proinflammatory or biomechanical loading conditions in vitro, cells were stimulated with interleukin-1β (IL-1β), which is increased at inflamed periodontal sites, and cyclic tensile strain of various magnitudes, respectively. The synthesis of BMP-2, its receptors (BMPR-1A, BMPR-1B and BMPR-2) and its inhibitors (follistatin, matrix gla protein and noggin) were analyzed using real-time RT-PCR and ELISA. RESULTS In EMD-treated cells, BMP-2 synthesis was increased significantly at 1 d. EMD also induced the expression of all BMP receptors, and of the BMP inhibitors follistatin and noggin. In general, IL-1β and biomechanical loading neither down-regulated BMP-2 nor up-regulated BMP inhibitors in EMD-stimulated cells. However, IL-1β and biomechanical loading, when applied for a longer time period, caused a down-regulation of EMD-induced BMP receptors. CONCLUSION EMD induces not only BMP-2, but also its receptors and inhibitors, in PDL cells. IL-1β and biomechanical forces may counteract the beneficial effects of EMD on BMP-2 activity via the down-regulation of BMP receptors.
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Affiliation(s)
- M Nokhbehsaim
- Clinical Research Unit, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany
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Schaefer AS, Richter GM, Dommisch H, Reinartz M, Nothnagel M, Noack B, Laine ML, Folwaczny M, Groessner-Schreiber B, Loos BG, Jepsen S, Schreiber S. CDKN2BAS is associated with periodontitis in different European populations and is activated by bacterial infection. J Med Genet 2010; 48:38-47. [DOI: 10.1136/jmg.2010.078998] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Schaefer A, Richter G, Nothnagel M, Laine M, Noack B, Glas J, Schrezenmeir J, Groessner-Schreiber B, Jepsen S, Loos B, Schreiber S. COX-2 Is Associated with Periodontitis in Europeans. J Dent Res 2010; 89:384-8. [DOI: 10.1177/0022034509359575] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
COX-2 plays an important role in periodontitis by mediating inflammatory reactions in periodontal tissues, and the COX-2 polymorphisms rs20417 and rs689466 have been reported to be associated with periodontitis in populations of Taiwanese and Chinese ethnicity. To test whether these variants were associated with periodontitis in populations of European ethnicity, we genotyped the single-nucleotide polymorphisms (SNPs) rs689466 and rs6681231, the latter a haplotype tagging SNP (htSNP) for rs20417 (r2>0.95), in our large-analysis population of individuals with aggressive (n = 532) and chronic periodontitis (n = 1052), and 2873 healthy control individuals. The rare G allele of htSNP rs6681231 was associated with aggressive periodontitis prior to and after adjustment for the covariates smoking, diabetes, and gender, with an odds ratio of 1.57 (95% confidence interval 1.18–2.08; p = 0.002). The validation of the association of rs20417 by the htSNP rs6681231 provides evidence for a general genetic risk of COX-2 variants in the pathogenesis of periodontitis.
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Affiliation(s)
- A.S. Schaefer
- Christian-Albrechts-University, Institute for Clinical Molecular Biology, Schittenhelmstraße 12, 24105 Kiel, Germany
- Christian-Albrechts-University, Institute of Medical Informatics and Statistics, House 31, Arnold-Heller-Straße 3, 24105 Kiel, Germany
- Department of Oral Microbiology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, van der Boechorststraat 7, 1081 BT Amsterdam, the Netherlands
- University Medical Center Carl Gustav Carus der Technischen Universität Dresden, Zentrum für Zahn-, Mund- und Kieferheilkunde, Poliklinik für Zahnerhaltung, Fetscherstraße 74, 01307 Dresden, Germany
- Department of Preventive Dentistry and Periodontology, University of Munich, Goethestraße 70, 80336 Munich, Germany
| | - G.M. Richter
- Christian-Albrechts-University, Institute for Clinical Molecular Biology, Schittenhelmstraße 12, 24105 Kiel, Germany
- Christian-Albrechts-University, Institute of Medical Informatics and Statistics, House 31, Arnold-Heller-Straße 3, 24105 Kiel, Germany
- Department of Oral Microbiology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, van der Boechorststraat 7, 1081 BT Amsterdam, the Netherlands
- University Medical Center Carl Gustav Carus der Technischen Universität Dresden, Zentrum für Zahn-, Mund- und Kieferheilkunde, Poliklinik für Zahnerhaltung, Fetscherstraße 74, 01307 Dresden, Germany
- Department of Preventive Dentistry and Periodontology, University of Munich, Goethestraße 70, 80336 Munich, Germany
| | - M. Nothnagel
- Christian-Albrechts-University, Institute for Clinical Molecular Biology, Schittenhelmstraße 12, 24105 Kiel, Germany
- Christian-Albrechts-University, Institute of Medical Informatics and Statistics, House 31, Arnold-Heller-Straße 3, 24105 Kiel, Germany
- Department of Oral Microbiology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, van der Boechorststraat 7, 1081 BT Amsterdam, the Netherlands
- University Medical Center Carl Gustav Carus der Technischen Universität Dresden, Zentrum für Zahn-, Mund- und Kieferheilkunde, Poliklinik für Zahnerhaltung, Fetscherstraße 74, 01307 Dresden, Germany
- Department of Preventive Dentistry and Periodontology, University of Munich, Goethestraße 70, 80336 Munich, Germany
| | - M.L. Laine
- Christian-Albrechts-University, Institute for Clinical Molecular Biology, Schittenhelmstraße 12, 24105 Kiel, Germany
- Christian-Albrechts-University, Institute of Medical Informatics and Statistics, House 31, Arnold-Heller-Straße 3, 24105 Kiel, Germany
- Department of Oral Microbiology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, van der Boechorststraat 7, 1081 BT Amsterdam, the Netherlands
- University Medical Center Carl Gustav Carus der Technischen Universität Dresden, Zentrum für Zahn-, Mund- und Kieferheilkunde, Poliklinik für Zahnerhaltung, Fetscherstraße 74, 01307 Dresden, Germany
- Department of Preventive Dentistry and Periodontology, University of Munich, Goethestraße 70, 80336 Munich, Germany
| | - B. Noack
- Christian-Albrechts-University, Institute for Clinical Molecular Biology, Schittenhelmstraße 12, 24105 Kiel, Germany
- Christian-Albrechts-University, Institute of Medical Informatics and Statistics, House 31, Arnold-Heller-Straße 3, 24105 Kiel, Germany
- Department of Oral Microbiology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, van der Boechorststraat 7, 1081 BT Amsterdam, the Netherlands
- University Medical Center Carl Gustav Carus der Technischen Universität Dresden, Zentrum für Zahn-, Mund- und Kieferheilkunde, Poliklinik für Zahnerhaltung, Fetscherstraße 74, 01307 Dresden, Germany
- Department of Preventive Dentistry and Periodontology, University of Munich, Goethestraße 70, 80336 Munich, Germany
| | - J. Glas
- Christian-Albrechts-University, Institute for Clinical Molecular Biology, Schittenhelmstraße 12, 24105 Kiel, Germany
- Christian-Albrechts-University, Institute of Medical Informatics and Statistics, House 31, Arnold-Heller-Straße 3, 24105 Kiel, Germany
- Department of Oral Microbiology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, van der Boechorststraat 7, 1081 BT Amsterdam, the Netherlands
- University Medical Center Carl Gustav Carus der Technischen Universität Dresden, Zentrum für Zahn-, Mund- und Kieferheilkunde, Poliklinik für Zahnerhaltung, Fetscherstraße 74, 01307 Dresden, Germany
- Department of Preventive Dentistry and Periodontology, University of Munich, Goethestraße 70, 80336 Munich, Germany
| | - J. Schrezenmeir
- Christian-Albrechts-University, Institute for Clinical Molecular Biology, Schittenhelmstraße 12, 24105 Kiel, Germany
- Christian-Albrechts-University, Institute of Medical Informatics and Statistics, House 31, Arnold-Heller-Straße 3, 24105 Kiel, Germany
- Department of Oral Microbiology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, van der Boechorststraat 7, 1081 BT Amsterdam, the Netherlands
- University Medical Center Carl Gustav Carus der Technischen Universität Dresden, Zentrum für Zahn-, Mund- und Kieferheilkunde, Poliklinik für Zahnerhaltung, Fetscherstraße 74, 01307 Dresden, Germany
- Department of Preventive Dentistry and Periodontology, University of Munich, Goethestraße 70, 80336 Munich, Germany
| | - B. Groessner-Schreiber
- Christian-Albrechts-University, Institute for Clinical Molecular Biology, Schittenhelmstraße 12, 24105 Kiel, Germany
- Christian-Albrechts-University, Institute of Medical Informatics and Statistics, House 31, Arnold-Heller-Straße 3, 24105 Kiel, Germany
- Department of Oral Microbiology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, van der Boechorststraat 7, 1081 BT Amsterdam, the Netherlands
- University Medical Center Carl Gustav Carus der Technischen Universität Dresden, Zentrum für Zahn-, Mund- und Kieferheilkunde, Poliklinik für Zahnerhaltung, Fetscherstraße 74, 01307 Dresden, Germany
- Department of Preventive Dentistry and Periodontology, University of Munich, Goethestraße 70, 80336 Munich, Germany
| | - S. Jepsen
- Christian-Albrechts-University, Institute for Clinical Molecular Biology, Schittenhelmstraße 12, 24105 Kiel, Germany
- Christian-Albrechts-University, Institute of Medical Informatics and Statistics, House 31, Arnold-Heller-Straße 3, 24105 Kiel, Germany
- Department of Oral Microbiology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, van der Boechorststraat 7, 1081 BT Amsterdam, the Netherlands
- University Medical Center Carl Gustav Carus der Technischen Universität Dresden, Zentrum für Zahn-, Mund- und Kieferheilkunde, Poliklinik für Zahnerhaltung, Fetscherstraße 74, 01307 Dresden, Germany
- Department of Preventive Dentistry and Periodontology, University of Munich, Goethestraße 70, 80336 Munich, Germany
| | - B.G. Loos
- Christian-Albrechts-University, Institute for Clinical Molecular Biology, Schittenhelmstraße 12, 24105 Kiel, Germany
- Christian-Albrechts-University, Institute of Medical Informatics and Statistics, House 31, Arnold-Heller-Straße 3, 24105 Kiel, Germany
- Department of Oral Microbiology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, van der Boechorststraat 7, 1081 BT Amsterdam, the Netherlands
- University Medical Center Carl Gustav Carus der Technischen Universität Dresden, Zentrum für Zahn-, Mund- und Kieferheilkunde, Poliklinik für Zahnerhaltung, Fetscherstraße 74, 01307 Dresden, Germany
- Department of Preventive Dentistry and Periodontology, University of Munich, Goethestraße 70, 80336 Munich, Germany
| | - S. Schreiber
- Christian-Albrechts-University, Institute for Clinical Molecular Biology, Schittenhelmstraße 12, 24105 Kiel, Germany
- Christian-Albrechts-University, Institute of Medical Informatics and Statistics, House 31, Arnold-Heller-Straße 3, 24105 Kiel, Germany
- Department of Oral Microbiology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, van der Boechorststraat 7, 1081 BT Amsterdam, the Netherlands
- University Medical Center Carl Gustav Carus der Technischen Universität Dresden, Zentrum für Zahn-, Mund- und Kieferheilkunde, Poliklinik für Zahnerhaltung, Fetscherstraße 74, 01307 Dresden, Germany
- Department of Preventive Dentistry and Periodontology, University of Munich, Goethestraße 70, 80336 Munich, Germany
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Schaefer AS, Richter GM, Nothnagel M, Laine ML, Rühling A, Schäfer C, Cordes N, Noack B, Folwaczny M, Glas J, Dörfer C, Dommisch H, Groessner-Schreiber B, Jepsen S, Loos BG, Schreiber S. A 3' UTR transition within DEFB1 is associated with chronic and aggressive periodontitis. Genes Immun 2009; 11:45-54. [PMID: 19829306 DOI: 10.1038/gene.2009.75] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Periodontal diseases are complex inflammatory diseases and affect up to 20% of the worldwide population. An unbalanced reaction of the immune system toward microbial pathogens is considered as the key factor in the development of periodontitis. Defensins have a strong antimicrobial function and are important contributors of the immune system toward maintaining health. Here, we present the first systematic association study of DEFB1. Using a haplotype-tagging single nucleotide polymorphism (SNP) approach, including described promoter SNPs of DEFB1, we investigated the associations of the selected variants in a large population (N=1337 cases and 2887 ethnically matched controls). The 3' untranslated region SNP, rs1047031, showed the most significant association signal for homozygous carriers of the rare A allele (P=0.002) with an increased genetic risk of 1.3 (95% confidence interval: 1.11-1.57). The association was consistent with the specific periodontitis forms: chronic periodontitis (odds ratio=2.2 (95% confidence interval: 1.16-4.35), P=0.02), and aggressive periodontitis (odds ratio=1.3 (95% confidence interval 1.04-1.68), P=0.02). Sequencing of regulatory and exonic regions of DEFB1 identified no other associated variant, pointing toward rs1047031 as likely being the causative variant. Prediction of microRNA targets identified a potential microRNA-binding site at the position of rs1047031.
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Affiliation(s)
- A S Schaefer
- Institute for Clinical Molecular Biology, University Medical Center Schleswig-Holstein, Kiel, Germany.
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Eberhard J, Pietschmann R, Falk W, Jepsen S, Dommisch H. The immune response of oral epithelial cells induced by single-species and complex naturally formed biofilms. ACTA ACUST UNITED AC 2009; 24:325-30. [DOI: 10.1111/j.1399-302x.2009.00518.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Loos BG, Fiebig A, Nothnagel M, Jepsen S, Groessner-Schreiber B, Franke A, Jervøe-Storm PM, Schenck K, van der Velden U, Schreiber S. NOD1 gene polymorphisms in relation to aggressive periodontitis. Innate Immun 2009; 15:225-32. [PMID: 19587002 DOI: 10.1177/1753425909103739] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND NOD proteins are part of innate immunity mechanisms. They play a role in epithelial barrier functions and inflammatory responses to bacteria. Single nucleotide polymorphisms (SNPs) in the NOD1 gene have proven to be associated with inflammatory bowel disease (IBD) and asthma. OBJECTIVE To investigate SNPs in the NOD1 gene in relation to aggressive periodontitis (AgP), a multifactorial, inflammatory disease of the supporting tissues of the teeth. MATERIALS AND METHODS Five SNPs in the NOD1 gene (4 intronic and 1 exonic) were tested for association in a total of 415 AgP patients and 874 controls both of Northern European ancestry. RESULTS The frequencies of the rare SNP alleles ranged between 21% and 26% among cases, and 20-27% among controls, and were not statistically different between cases and controls. Two SNPs were in strong linkage disequilibrium (r(2) = 0.97 in cases and 0.94 in controls). The overall haplotype distributions did not differ between cases and controls. We observed 8 haplotypes with a frequency of >or=1% among cases and/or controls, but none of these haplotype frequencies differed significantly among cases and controls. Logistic regression analyses with adjustment for gender and smoking status did not reveal significant associations with AgP for any of the 5 SNPs. This study had a power of >or=95% to detect associations with variants carrying relative risks of >or=1.5 for heterozygote carriers and >or=2.25 for homozygote carriers. CONCLUSIONS Although SNPs in the NOD1 gene have been strongly associated with cases of IBD, the current study failed to show an association of NOD1 SNPs with AgP.
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Affiliation(s)
- B G Loos
- Department of Periodontology, Academic Center for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands.
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Dommisch H, Vorderwülbecke S, Eberhard J, Steglich M, Jepsen S. SELDI-TOF-MS of gingival crevicular fluid--a methodological approach. Arch Oral Biol 2009; 54:803-9. [PMID: 19555922 DOI: 10.1016/j.archoralbio.2009.05.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2009] [Revised: 05/11/2009] [Accepted: 05/27/2009] [Indexed: 01/27/2023]
Abstract
Human neutrophil peptides (HNPs) and the human cathelicidin LL-37 are antimicrobial peptides secreted by neutrophils, which play a crucial role in innate immune responses. The aim of this study was to establish a new method for ProteinChip arrays in combination with surface enhanced laser desorption/ionization (SELDI) technology and time-of-flight mass spectrometry to analyze gingival crevicular fluid (GCF) samples. To optimize experimental conditions, four different ProteinChip arrays (NP20; CM10, pH 4; CM10, pH 7; IMAC) along with corresponding binding buffers were tested. GCF samples were collected from patients showing healthy periodontal sites and sites with early signs of inflammation (gingivitis), but with no pocket depth greater than 4 mm. For GCF analysis, NP20 arrays and CM10 (pH 4) arrays showed specific and reproducible profiles in the range of 2.5-30.0 kDa. Donors that demonstrated significantly higher intensity peaks corresponding to the mass of LL-37 (p=0.01) also tended to show greater intensity peaks corresponding to the masses of HNP-1 and HNP-2 in samples from inflamed compared to healthy periodontal sites. The findings indicate that analysis of GCF samples by SELDI-TOF mass spectrometry is a useful approach to simultaneously analyze multiple markers, such as antimicrobial peptides, which may be beneficial for determination of new periodontal risk factors.
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Affiliation(s)
- H Dommisch
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany.
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Wenghoefer M, Pantelis A, Dommisch H, Götz W, Reich R, Bergé S, Martini M, Allam JP, Jepsen S, Merkelbach-Bruse S, Fischer HP, Novak N, Winter J. Nuclear hBD-1 accumulation in malignant salivary gland tumours. BMC Cancer 2008; 8:290. [PMID: 18840281 PMCID: PMC2567991 DOI: 10.1186/1471-2407-8-290] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2007] [Accepted: 10/07/2008] [Indexed: 12/05/2022] Open
Abstract
Background Whereas the antimicrobial peptides hBD-2 and -3 are related to inflammation, the constitutively expressed hBD-1 might function as 8p tumour suppressor gene and thus play a key role in control of transcription and induction of apoptosis in malignant epithelial tumours. Therefore this study was conducted to characterise proteins involved in cell cycle control and host defence in different benign and malignant salivary gland tumours in comparison with healthy salivary gland tissue. Methods 21 paraffin-embedded tissue samples of benign (n = 7), and malignant (n = 7) salivary gland tumours as well as healthy (n = 7) salivary glands were examined immunohistochemically for the expression of p53, bcl-2, and hBD-1, -2, -3. Results HBD-1 was distributed in the cytoplasm of healthy salivary glands and benign salivary gland tumours but seems to migrate into the nucleus of malignant salivary gland tumours. Pleomorphic adenomas showed cytoplasmic as well as weak nuclear hBD-1 staining. Conclusion HBD-1, 2 and 3 are traceable in healthy salivary gland tissue as well as in benign and malignant salivary gland tumours. As hBD-1 is shifted from the cytoplasm to the nucleus in malignant salivary gland tumours, we hypothesize that it might play a role in the oncogenesis of these tumours. In pleomorphic adenomas hBD-1 might be connected to their biologic behaviour of recurrence and malignant transformation.
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Affiliation(s)
- M Wenghoefer
- Department of Oral & Maxillofacial Plastic Surgery, University of Bonn, Sigmund-Freud-Str. 25, 53105 Bonn, Germany.
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Blome B, Braun A, Sobarzo V, Jepsen S. Molecular identification and quantification of bacteria from endodontic infections using real-time polymerase chain reaction. ACTA ACUST UNITED AC 2008; 23:384-90. [DOI: 10.1111/j.1399-302x.2008.00440.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dommisch H, Steglich M, Eberhard J, Winter J, Jepsen S. Phosphatidylinositol-3-kinase inhibitor LY 294002 blocksStreptococcus mutans-induced interleukin (IL)-6 and IL-8 gene expression in odontoblast-like cells. Int Endod J 2008; 41:763-71. [DOI: 10.1111/j.1365-2591.2008.01429.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Jepsen S, Topoll H, Rengers H, Heinz B, Teich M, Hoffmann T, Al-Machot E, Meyle J, Jervøe-Storm PM. Clinical outcomes after treatment of intra-bony defects with an EMD/synthetic bone graft or EMD alone: a multicentre randomized-controlled clinical trial. J Clin Periodontol 2008; 35:420-8. [DOI: 10.1111/j.1600-051x.2008.01217.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
An 18-month-old previous healthy girl who had ingested 442 mg elemental iron/kg was admitted to a paediatric intensive care unit. The child was treated with gastric lavage, whole bowel irrigation and intravenous deferoxamine. After 2 h of standard therapy serum iron had risen threefold to 1362 microg/dl (244 micromol/l). The child was treated with exchange transfusion (ET; 52 ml/kg) and serum iron fell to 134 microg/dl (24 micromol/l). The patient made an uncomplicated recovery. ET should be considered in severe iron poisoning when standard therapy is inadequate.
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Affiliation(s)
- M Carlsson
- Pediatric Intensive Care Unit, Afdeling V, Odense University Hospital, Sdr. Boulevard 29, 5000 Odense C., Denmark.
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Wenghoefer M, Pantelis A, Dommisch H, Reich R, Martini M, Allam JP, Novak N, Bergé S, Jepsen S, Winter J. Decreased gene expression of human beta-defensin-1 in the development of squamous cell carcinoma of the oral cavity. Int J Oral Maxillofac Surg 2008; 37:660-3. [PMID: 18346877 DOI: 10.1016/j.ijom.2008.02.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2007] [Accepted: 02/04/2008] [Indexed: 10/22/2022]
Abstract
The aim of this study was to investigate the gene expression of human beta-defensin-1, -2, -3 (hBD-1, -2, -3), interleukin-1beta, tumour necrosis factor-alpha and cyclooxygenase-2 in oral squamous cell carcinoma (OSCC) compared to benign and premalignant lesions as well as healthy controls. Biopsies of healthy gingiva (n=5), irritation fibroma (n=5), leukoplakia (n=5) and OSCC (n=5) were obtained during routine surgical procedures. RNA was extracted according to standard protocols and transcripts of hBD-1, -2, -3, interleukin-1beta, tumour necrosis factor-alpha and cyclooxygenase-2 were analysed by real-time polymerase chain reaction. The expression of hBD-1 was reduced in all lesions (5-fold in irritation fibroma and 2.5-fold in leukoplakia), but most significantly (50-fold) in OSCC. hBD-1 appears to play a role in the development of OSCC. The loss of its function might contribute to the malignant progression of these tumours.
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Affiliation(s)
- M Wenghoefer
- University of Bonn, Uni-Klinikum Bonn Klinik and Poliklinik for MKG-Chirurgie, Bonn, Germany.
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Abstract
BACKGROUND In an attempt to enhance treatment outcomes, alternative protocols for anti-infective periodontal therapy have been introduced. OBJECTIVES To evaluate the effectiveness of full-mouth disinfection or full-mouth scaling compared to conventional quadrant scaling for periodontitis. SEARCH STRATEGY Data sources included electronic databases, handsearched journals and contact with experts. The Cochrane Oral Health Group Trials Register, the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE and EMBASE were searched. Reference lists from relevant articles were scanned and the authors of eligible studies were contacted to identify trials and obtain additional information. Date of most recent searches: December 2006: (CENTRAL) (The Cochrane Library 2006, Issue 4). SELECTION CRITERIA Randomised controlled trials were selected with at least 3 months follow up comparing full-mouth scaling and root planing within 24 hours with (FMD) or without (FMS) the adjunctive use of an antiseptic (chlorhexidine) with conventional quadrant scaling and root planing (control). The methodological quality of the studies was assessed within the data extraction form, mainly focusing on: method of randomisation, allocation concealment, blindness of examiners and completeness of follow up. DATA COLLECTION AND ANALYSIS Data extraction and quality assessment were conducted independently by multiple review authors. The primary outcome measure was tooth loss, secondary outcomes were reduction of probing depth, bleeding on probing and gain in probing attachment. The Cochrane Collaboration statistical guidelines were followed. MAIN RESULTS The search identified 216 abstracts. Review of these abstracts resulted in 12 publications for detailed review. Finally, seven randomised controlled trials (RCTs) which met the criteria for eligibility were independently selected by two review authors. None of the studies included reported on tooth loss. All treatment modalities led to significant improvements in clinical parameters after a follow up of at least 3 months. For the secondary outcome, reduction in probing depth, the mean difference between FMD and control was 0.53 mm (95% confidence interval (CI) 0.28 to 0.77) in moderately deep pockets of single rooted teeth and for gain in probing attachment 0.33 mm (95% CI 0.04 to 0.62) in moderately deep single and multirooted teeth. Comparing FMD and FMS the mean difference in one study for gain in probing attachment amounted to 0.74 mm in favour of FMS (95% CI 0.17 to 1.31) for deep pockets in multirooted teeth, while another study reported a mean difference for reduction in bleeding on probing of 18% in favour of FMD (95% CI -33.74 to -2.26) for deep pockets of single rooted teeth. No significant differences were observed for any of the outcome measures, when comparing FMS and control. AUTHORS' CONCLUSIONS In patients with chronic periodontitis in moderately deep pockets slightly more favourable outcomes for pocket reduction and gain in probing attachment were found following FMD compared to control. However, these additional improvements were only modest and there was only a very limited number of studies available for comparison, thus limiting general conclusions about the clinical benefit of full-mouth disinfection.
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Affiliation(s)
- J Eberhard
- University Kiel, Department of Operative Dentistry and Periodontology, Arnold-Heller-Str. 16, Kiel, Germany, 24105.
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Eberhard J, Menzel N, Dommisch H, Winter J, Jepsen S, Mutters R. The stage of native biofilm formation determines the gene expression of human β-defensin-2, psoriasin, ribonuclease 7 and inflammatory mediators: a novel approach for stimulation of keratinocytes with in situ formed biofilms. ACTA ACUST UNITED AC 2007; 23:21-8. [DOI: 10.1111/j.1399-302x.2007.00385.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
AIM To investigate the effects of human beta-defensins on the expression of genes involved in the host immune response of the dental pulp. METHODOLOGY Human odontoblast-like cells were cultured in Dulbecco's modified Eagle's medium. Cells were stimulated by recombinant human beta-defensins (rhBDs) up to 4 h. RNA was extracted followed by cDNA synthesis (oligo-(dT)-primer). Samples were analysed by real-time polymerase chain reaction (PCR) technology. Genes of interest were: human beta-defensin-1, -2, interleukin (IL)-6, IL-8, tumour necrosis factor-alpha, cyclooxygenase-2, leukotriene-A4-hydrolase, cytosolic phospholipase-A-2 (cPLA(2)), and dentine sialophosphoprotein. Gene expression of beta-actin served as internal standard for normalizing real-time PCR data. Two-way anova and the paired t-test were applied for comparison of the gene expression. RESULTS In odontoblast-like cells rhBD-2 stimulation led to a down-regulation of the gene expression of hBD-1 (P < 0.05), whilst the mRNA expression of IL-6 (P < 0.05), IL-8 (P < 0.05) and cPLA(2) was increased in response to rhBD-2. CONCLUSION The results of the present study suggest immune regulatory functions of human beta-defensin-2 in odontoblast-like cells.
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Affiliation(s)
- H Dommisch
- Department of Periodontology, Operative and Preventative Dentistry, University Hospital Bonn, Bonn, Germany.
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Krause F, Braun A, Eberhard J, Jepsen S. Laser fluorescence measurements compared to electrical resistance of residual dentine in excavated cavities in vivo. Caries Res 2007; 41:135-40. [PMID: 17284915 DOI: 10.1159/000098047] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2005] [Accepted: 07/20/2006] [Indexed: 11/19/2022] Open
Abstract
It has been suggested that laser fluorescence close to the dental pulp shows higher values than more distant measurements. The aim of this study was to assess fluorescence on the cavity floor and to correlate these measurements with electrical resistance as a measure of residual dentine thickness. Thirty carious lesions were excavated with a bur. The endpoint of caries removal was determined by visual, tactile and auditory means. Fluorescence was measured with the Diagnodent device and with the fluorescence feedback system of a therapeutic Er:YAG laser. Electrical resistance of the residual dentine (Prepometer units, PU) was measured with a proprietary device. Significant differences were observed between the fluorescence systems (p < 0.05). For Diagnodent, a decrease of electrical resistance of the residual dentine resulted in an increase of the fluorescence values of 2.99 units/PU (95% CI = 2.00-3.97) and an increase of 0.30 units/PU (95% CI = 0.19-0.40) for the fluorescence feedback system. For zero electrical resistance, a predicted maximum value of 51.5 units (95% CI = 41.3-61.7) was calculated for the Diagnodent and 5.1 units (95% CI = 4.1-6.2) for the feedback system. The study indicates that using the suggested detection cut-off with the Diagnodent device may be not suited to assess the endpoint of caries removal close to the dental pulp. Employing the Key Laser III, values up to 6 units might be caused solely by close proximity to the pulp, which should be considered when caries removal by laser is controlled by laser fluorescence feedback.
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Affiliation(s)
- F Krause
- Department of Operative Dentistry and Periodontology, University of Bonn, Bonn, Germany.
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