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Ziogos E, Chelko SP, Walsh E, Engel M, Gerstenblith G, Halushka MK, Leucker TM. Proprotein convertase subtilisin/kexin type 9 (PCSK9), platelet activation and interaction with the vascular endothelium: the impact of PCSK9 inhibition with evolocumab in acute coronary syndrome. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background/Introduction
Platelet activation and endothelial dysfunction may contribute to adverse outcomes in patients with acute myocardial infarction. Pre-clinical studies indicate PCSK9 enhances platelet activation.
Purpose
Our goals were (1) to examine the role of PCSK9 as a potential mediator of platelet activation in patients with acute coronary syndrome (ACS) and (2) to perform immunohistochemical studies of left internal mammary artery (LIMA) specimens to examine interactions among PCSK9, platelets, and endothelial cells in specimens obtained during coronary bypass surgery.
Methods
Participants from the Evolocumab in Acute Coronary Syndrome trials (EVACS; NCT03515304, NCT04082442), with a NSTEMI and a troponin-I of >5 ng/ml or a STEMI were randomized to placebo or to 420 mg SC of evolocumab, a monoclonal anti-PCSK9 antibody, within 24 hours of hospitalization. We performed serial ex vivo analysis of PF4, a marker of platelet activation, in serum samples obtained at baseline (prior to study drug administration) and at day 30. PF4 values were normalized to total platelet count. All of the participants were on guideline-directed therapies for ACS. Additionally, LIMA samples from patients undergoing coronary bypass surgery were immunostained with PCSK9, the endothelial cell transmembrane glycoprotein CD31 (platelet endothelial cell adhesion molecule-1) and the platelet surface marker CD61 (integrin beta-3). Outcome data were summarized using medians and interquartile ranges.
Results
Forty-six participants were randomized in a 1:1 fashion to placebo or to evolocumab. Mean (±SD) age of the cohort was 60±13 years, 48% were women and 22% were African American. Baseline PF4 levels (expressed as ng/1k platelets) were similar between the two groups (placebo: 9.3 [4–12] vs evolocumab 8.0 [4–12], p=0.8). In the placebo group, there was a significant increase in PF4 at 30 days to 13.1 [11–14], p<0.01 (baseline vs 30 days). In contrast, there was no significant change from baseline in the evolocumab group at 30 days (10.7 [6–13]), which was significantly lower than the placebo group (p=0.04). Furthermore, immunostaining of LIMA specimens obtained from patients during coronary artery bypass surgery revealed colocalization of PCSK9, CD31, and CD61 on the vascular endothelial cell surface (see Figure).
Conclusion
PCSK9 inhibition with evolocumab decreases platelet activation in ACS patients on dual anti-platelet therapy. PCSK9 is associated with platelets and endothelial cells at the vascular endothelium. PCSK9 is a potential mediator of the interaction between platelets and vascular endothelial cells in patients with coronary artery disease.
Funding Acknowledgement
Type of funding sources: Other. Main funding source(s): Amgen
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Affiliation(s)
- E Ziogos
- The Johns Hopkins University School of Medicine, Department of Medicine , Baltimore , United States of America
| | - S P Chelko
- Florida State University College of Medicine, Department of Biomedical Sciences , Tallahassee , United States of America
| | - E Walsh
- The Johns Hopkins University School of Medicine, Department of Pathology , Baltimore , United States of America
| | - M Engel
- Florida State University College of Medicine, Department of Biomedical Sciences , Tallahassee , United States of America
| | - G Gerstenblith
- The Johns Hopkins University School of Medicine, Department of Medicine , Baltimore , United States of America
| | - M K Halushka
- The Johns Hopkins University School of Medicine, Department of Pathology , Baltimore , United States of America
| | - T M Leucker
- The Johns Hopkins University School of Medicine, Department of Medicine , Baltimore , United States of America
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Hengsbach JN, Engel M, Holtmann D, Ulber R. Electro‐assisted fermentation of
Clostridium acetobutylicum
in a newly designed single‐chamber bioreactor. CHEM-ING-TECH 2022. [DOI: 10.1002/cite.202255080] [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: 11/08/2022]
Affiliation(s)
- J.-N. Hengsbach
- Technical University Kaiserslautern Mechanical and Process Engineering Gottlieb Daimler-Str. 49 67663 Kaiserslautern Germany
| | - M. Engel
- Technical University Kaiserslautern Mechanical and Process Engineering Gottlieb Daimler-Str. 49 67663 Kaiserslautern Germany
| | - D. Holtmann
- Technische Hochschule Mittelhessen Life Science Engineering Wiesenstr. 14 35390 Gießen Germany
| | - R. Ulber
- Technical University Kaiserslautern Mechanical and Process Engineering Gottlieb Daimler-Str. 49 67663 Kaiserslautern Germany
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Keller J, Wedel T, Seidl H, Kreis ME, van der Voort I, Gebhard M, Langhorst J, Lynen Jansen P, Schwandner O, Storr M, van Leeuwen P, Andresen V, Preiß JC, Layer P, Allescher H, Andus T, Bischoff SC, Buderus S, Claßen M, Ehlert U, Elsenbruch S, Engel M, Enninger A, Fischbach W, Freitag M, Frieling T, Gillessen A, Goebel-Stengel M, Gschossmann J, Gundling F, Haag S, Häuser W, Helwig U, Hollerbach S, Holtmann G, Karaus M, Katschinski M, Krammer H, Kruis W, Kuhlbusch-Zicklam R, Lynen Jansen P, Madisch A, Matthes H, Miehlke S, Mönnikes H, Müller-Lissner S, Niesler B, Pehl C, Pohl D, Posovszky C, Raithel M, Röhrig-Herzog G, Schäfert R, Schemann M, Schmidt-Choudhury A, Schmiedel S, Schweinlin A, Schwille-Kiuntke J, Stengel A, Tesarz J, Voderholzer W, von Boyen G, von Schönfeld J. Update S3-Leitlinie Intestinale Motilitätsstörungen: Definition, Pathophysiologie, Diagnostik und Therapie. Gemeinsame Leitlinie der Deutschen Gesellschaft für Gastroenterologie, Verdauungs- und Stoffwechselkrankheiten (DGVS) und der Deutschen Gesellschaft für Neurogastroenterologie und Motilität (DGNM). Z Gastroenterol 2022; 60:192-218. [PMID: 35148561 DOI: 10.1055/a-1646-1279] [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] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Jutta Keller
- Medizinische Klinik, Israelitisches Krankenhaus in Hamburg, Hamburg, Deutschland
| | - Thilo Wedel
- Institut für Anatomie, Christian-Albrechts-Universität Kiel, Kiel, Deutschland
| | - Holger Seidl
- Klinik für Gastroenterologie, Hepatologie und Gastroenterologische Onkologie, Isarklinikum München, München, Deutschland
| | - Martin E Kreis
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Charité, Campus Benjamin Franklin, Berlin, Deutschland
| | - Ivo van der Voort
- Klinik für Innere Medizin - Gastroenterologie und Diabetologie, Jüdisches Krankenhaus Berlin, Deutschland
| | | | - Jost Langhorst
- Klinik für Integrative Medizin und Naturheilkunde, Klinikum Bamberg, Bamberg, Deutschland
| | - Petra Lynen Jansen
- Deutsche Gesellschaft für Gastroenterologie, Verdauungs- und Stoffwechselkrankheiten, Berlin, Deutschland
| | - Oliver Schwandner
- Abteilung für Proktologie, Krankenhaus Barmherzige Brüder, Regensburg
| | - Martin Storr
- Zentrum für Endoskopie, Gesundheitszentrum Starnberger See, Starnberg
| | - Pia van Leeuwen
- Deutsche Gesellschaft für Gastroenterologie, Verdauungs- und Stoffwechselkrankheiten, Berlin, Deutschland
| | - Viola Andresen
- Medizinische Klinik, Israelitisches Krankenhaus in Hamburg, Hamburg, Deutschland
| | - Jan C Preiß
- Klinik für Innere Medizin - Gastroenterologie, Diabetologie und Hepatologie, Klinikum Neukölln, Berlin
| | - Peter Layer
- Medizinische Klinik, Israelitisches Krankenhaus in Hamburg, Hamburg, Deutschland
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Layer P, Andresen V, Allescher H, Bischoff SC, Claßen M, Elsenbruch S, Freitag M, Frieling T, Gebhard M, Goebel-Stengel M, Häuser W, Holtmann G, Keller J, Kreis ME, Kruis W, Langhorst J, Jansen PL, Madisch A, Mönnikes H, Müller-Lissner S, Niesler B, Pehl C, Pohl D, Raithel M, Röhrig-Herzog G, Schemann M, Schmiedel S, Schwille-Kiuntke J, Storr M, Preiß JC, Andus T, Buderus S, Ehlert U, Engel M, Enninger A, Fischbach W, Gillessen A, Gschossmann J, Gundling F, Haag S, Helwig U, Hollerbach S, Karaus M, Katschinski M, Krammer H, Kuhlbusch-Zicklam R, Matthes H, Menge D, Miehlke S, Posovszky MC, Schaefert R, Schmidt-Choudhury A, Schwandner O, Schweinlin A, Seidl H, Stengel A, Tesarz J, van der Voort I, Voderholzer W, von Boyen G, von Schönfeld J, Wedel T. Update S3-Leitlinie Reizdarmsyndrom: Definition, Pathophysiologie, Diagnostik und Therapie. Gemeinsame Leitlinie der Deutschen Gesellschaft für Gastroenterologie, Verdauungs- und Stoffwechselkrankheiten (DGVS) und der Deutschen Gesellschaft für Neurogastroenterologie und Motilität (DGNM) – Juni 2021 – AWMF-Registriernummer: 021/016. Z Gastroenterol 2021; 59:1323-1415. [PMID: 34891206 DOI: 10.1055/a-1591-4794] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- P Layer
- Medizinische Klinik, Israelitisches Krankenhaus, Hamburg, Deutschland
| | - V Andresen
- Medizinische Klinik, Israelitisches Krankenhaus, Hamburg, Deutschland
| | - H Allescher
- Zentrum für Innere Medizin, Gastroent., Hepatologie u. Stoffwechsel, Klinikum Garmisch-Partenkirchen, Garmisch-Partenkirchen, Deutschland
| | - S C Bischoff
- Institut für Ernährungsmedizin, Universität Hohenheim, Stuttgart, Deutschland
| | - M Claßen
- Klinik für Kinder- und Jugendmedizin, Klinikum Links der Weser, Bremen, Deutschland
| | - S Elsenbruch
- Klinik für Neurologie, Translational Pain Research Unit, Universitätsklinikum Essen, Essen, Deutschland.,Abteilung für Medizinische Psychologie und Medizinische Soziologie, Ruhr-Universität Bochum, Bochum, Deutschland
| | - M Freitag
- Abteilung Allgemeinmedizin Department für Versorgungsforschung, Universität Oldenburg, Oldenburg, Deutschland
| | - T Frieling
- Medizinische Klinik II, Helios Klinikum Krefeld, Krefeld, Deutschland
| | - M Gebhard
- Gemeinschaftspraxis Pathologie-Hamburg, Hamburg, Deutschland
| | - M Goebel-Stengel
- Innere Medizin II, Helios Klinik Rottweil, Rottweil, und Innere Medizin VI, Psychosomat. Medizin u. Psychotherapie, Universitätsklinikum Tübingen, Tübingen, Deutschland
| | - W Häuser
- Innere Medizin I mit Schwerpunkt Gastroenterologie, Klinikum Saarbrücken, Saarbrücken, Deutschland
| | - G Holtmann
- Faculty of Medicine & Faculty of Health & Behavioural Sciences, Princess Alexandra Hospital, Brisbane, Australien
| | - J Keller
- Medizinische Klinik, Israelitisches Krankenhaus, Hamburg, Deutschland
| | - M E Kreis
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Deutschland
| | | | - J Langhorst
- Klinik für Integrative Medizin und Naturheilkunde, Sozialstiftung Bamberg, Klinikum am Bruderwald, Bamberg, Deutschland
| | - P Lynen Jansen
- Deutsche Gesellschaft für Gastroenterologie, Verdauungs- und Stoffwechselkrankheiten, Berlin, Deutschland
| | - A Madisch
- Klinik für Gastroenterologie, interventionelle Endoskopie und Diabetologie, Klinikum Siloah, Klinikum Region Hannover, Hannover, Deutschland
| | - H Mönnikes
- Klinik für Innere Medizin, Martin-Luther-Krankenhaus, Berlin, Deutschland
| | | | - B Niesler
- Abteilung Molekulare Humangenetik Institut für Humangenetik, Universitätsklinikum Heidelberg, Heidelberg, Deutschland
| | - C Pehl
- Medizinische Klinik, Krankenhaus Vilsbiburg, Vilsbiburg, Deutschland
| | - D Pohl
- Klinik für Gastroenterologie und Hepatologie, Universitätsspital Zürich, Zürich, Schweiz
| | - M Raithel
- Medizinische Klinik II m.S. Gastroenterologie und Onkologie, Waldkrankenhaus St. Marien, Erlangen, Deutschland
| | | | - M Schemann
- Lehrstuhl für Humanbiologie, TU München, Deutschland
| | - S Schmiedel
- I. Medizinische Klinik und Poliklinik Gastroenterologie, Universitätsklinikum Hamburg-Eppendorf, Deutschland
| | - J Schwille-Kiuntke
- Abteilung für Psychosomatische Medizin und Psychotherapie, Medizinische Universitätsklinik Tübingen, Tübingen, Deutschland.,Institut für Arbeitsmedizin, Sozialmedizin und Versorgungsforschung, Universitätsklinikum Tübingen, Tübingen, Deutschland
| | - M Storr
- Zentrum für Endoskopie, Gesundheitszentrum Starnberger See, Starnberg, Deutschland
| | - J C Preiß
- Klinik für Innere Medizin - Gastroenterologie, Diabetologie und Hepatologie, Vivantes Klinikum Neukölln, Berlin, Deutschland
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Engel M, Simmons K, Furman J, Burde D, Webb M, Mathews A. Find Your Happy Plate Campaign: A Theory-based Multicomponent Nutrition Communication Campaign for College Students. J Acad Nutr Diet 2021. [DOI: 10.1016/j.jand.2021.08.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kuehle R, Ewerbeck N, Rückschloß T, Ristow O, El Damaty A, Freudlsperger C, Hoffmann J, Engel M. Photogrammetric evaluation of corrective surgery for trigonocephaly. Int J Oral Maxillofac Surg 2021; 51:70-77. [PMID: 34229921 DOI: 10.1016/j.ijom.2021.06.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 11/08/2020] [Revised: 05/30/2021] [Accepted: 06/08/2021] [Indexed: 11/16/2022]
Abstract
The aim of this study was to capture preoperative, postoperative, and follow-up head shapes of male trigonocephaly patients who underwent fronto-orbital remodelling (FOR), using three-dimensional (3D) photography. Fifty-seven male infants with metopic synostosis operated on using standardized FOR during a 5-year period were included. All measurements were compared with those of an age-matched healthy control cohort (n = 253 for early postoperative comparison, n = 43 for the 1-year follow-up comparison) to determine the effect of FOR at 14 days and at 1 year post-surgery. Intracranial volume, frontal angle, nasofrontal angle, interfrontoparietal-interparietal ratio, and inter-orbital distances were measured 1 day preoperatively, 14 days and 1 year postoperatively. Mean age at surgery was 9.7 ± 1.1 months. Prior to surgery, boys with metopic synostosis showed a reduced intracranial volume (-7.0%, P < 0.001), frontal angle (-10.2%, P < 0.001), interfrontoparietal-interparietal ratio (-4.9%, P < 0.01), and orbital distances (-6.5%, P < 0.001) compared to the reference group, but values did not differ significantly from the specific control group after surgery (all P> 0.05). This was consistent by the time of the follow-up examination. Corrective surgery should therefore aim to achieve volume expansion and correction of the deformity. Furthermore, 3D photogrammetry provides a valuable alternative to computed tomography scans in the diagnosis of metopic synostosis, significantly reducing the amount of radiation exposure to the brain.
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Affiliation(s)
- R Kuehle
- Department of Oral and Maxillofacial Surgery, University of Heidelberg, Heidelberg, Germany.
| | - N Ewerbeck
- Department of Oral and Maxillofacial Surgery, University of Heidelberg, Heidelberg, Germany
| | - T Rückschloß
- Department of Oral and Maxillofacial Surgery, University of Heidelberg, Heidelberg, Germany
| | - O Ristow
- Department of Oral and Maxillofacial Surgery, University of Heidelberg, Heidelberg, Germany
| | - A El Damaty
- Department of Neurosurgery, University of Heidelberg, Heidelberg, Germany
| | - C Freudlsperger
- Department of Oral and Maxillofacial Surgery, University of Heidelberg, Heidelberg, Germany
| | - J Hoffmann
- Department of Oral and Maxillofacial Surgery, University of Heidelberg, Heidelberg, Germany
| | - M Engel
- Department of Oral and Maxillofacial Surgery, University of Heidelberg, Heidelberg, Germany
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Ntshingila S, Khumalo NP, Engel M, Arowolo AT. An appraisal of laboratory models of androgenetic alopecia: A systematic review. Skin Health and Disease 2021; 1:e15. [PMID: 35664985 PMCID: PMC9060143 DOI: 10.1002/ski2.15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 01/04/2021] [Accepted: 01/05/2021] [Indexed: 12/20/2022]
Abstract
Background Androgenetic alopecia (AGA) is the most common form of non‐scarring alopecia in humans. Several studies have used different laboratory models to study the pathogenesis and interventions for AGA. These study models have proved beneficial and have led to the approval of two drugs. However, the need to build on existing knowledge remains by examining the relevance of study models to the disease. Objective We sought to appraise laboratory or pre‐clinical models of AGA. Method We searched through databases (PubMed, ScienceDirect, Web of Science, World CAT, Scopus and Google Scholar) for articles on AGA‐related studies from 1942 to March 2019 with a focus on study models. Results The search rendered 101 studies after screening and deduplication. Several studies (70) used in vitro models, mostly consisting of two‐dimensional monolayer cells for experiments involving the characterization of androgen and 5‐alpha reductase (5AR) and inhibition thereof, the effects of dihydrotestosterone (DHT) and biomarker(s) of AGA. Twenty‐seven studies used in vivo models of mice and monkeys to investigate DHT synthesis, the expression and inhibition of 5AR and hair growth. Only four studies used AGA‐related or healthy excisional/punch biopsy explants as ex vivo models to study the action of 5AR inhibitors and AGA‐associated genes. No study used three‐dimensional [3‐D] organoids or organotypic human skin culture models. Conclusion We recommend clinically relevant laboratory models like human or patient‐derived 3‐D organoids or organotypic skin in AGA‐related studies. These models are closer to human scalp tissue and minimize the use of laboratory animals and could ultimately facilitate novel therapeutics.
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Affiliation(s)
- S. Ntshingila
- Hair and Skin Research Laboratory Division of Dermatology Department of Medicine Faculty of Health Sciences and Groote Schuur Hospital University of Cape Town Cape Town South Africa
| | - N. P. Khumalo
- Hair and Skin Research Laboratory Division of Dermatology Department of Medicine Faculty of Health Sciences and Groote Schuur Hospital University of Cape Town Cape Town South Africa
| | - M. Engel
- Department of Medicine Faculty of Health Sciences and Groote Schuur Hospital University of Cape Town Cape Town South Africa
| | - A. T. Arowolo
- Hair and Skin Research Laboratory Division of Dermatology Department of Medicine Faculty of Health Sciences and Groote Schuur Hospital University of Cape Town Cape Town South Africa
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Djeudeu D, Engel M, Jöckel KH, Moebus S, Ickstadt K. Spatio-temporal analysis of the risk of depression at district-level and association with greenness based on the Heinz Nixdorf Recall Study. Spat Spatiotemporal Epidemiol 2020; 33:100340. [PMID: 32370935 DOI: 10.1016/j.sste.2020.100340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 01/27/2020] [Accepted: 02/10/2020] [Indexed: 11/20/2022]
Abstract
In urban health studies where spatial and temporal changes are of importance, spatio-temporal variations are usually neglected. For the Heinz Nixdorf Recall Study, we investigate spatio-temporal variation in analyses of effects of urban greenness on depression by including spatio-temporal random effect terms in a Poisson model on district level. Our results show negative associations between greenness and depression. The findings suggest strong temporal autocorrelation and weak spatial effects. Even if the weak spatial effects are suggestive of neglecting them, as in our case, spatio-temporal random effects should be taken into account to provide reliable inference in urban health studies.
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Affiliation(s)
- D Djeudeu
- Faculty of Statistics, TU Dortmund University, Dortmund 44221, Germany; Centre for Urban Epidemiology (CUE), Institute for Medical Informatics, Biometry and Epidemiology (IMIBE), University Hospital Essen, University Duisburg-Essen, Hufelandstr. 55, Essen 45122, Germany.
| | - M Engel
- Institute for Medical Informatics, Biometry and Epidemiology (IMIBE), University Hospital Essen, University Duisburg-Essen, Hufelandstr. 55, Essen 45122, Germany
| | - K-H Jöckel
- Institute for Medical Informatics, Biometry and Epidemiology (IMIBE), University Hospital Essen, University Duisburg-Essen, Hufelandstr. 55, Essen 45122, Germany
| | - S Moebus
- Centre for Urban Epidemiology (CUE), Institute for Medical Informatics, Biometry and Epidemiology (IMIBE), University Hospital Essen, University Duisburg-Essen, Hufelandstr. 55, Essen 45122, Germany
| | - K Ickstadt
- Faculty of Statistics, TU Dortmund University, Dortmund 44221, Germany
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Zaoui K, Jung A, Wimmer W, Engel M, Möhlenbruch MA, Federspil PA. Topographic bone thickness maps to evaluate the intuitive placement of titanium miniplates for nasal prostheses. Int J Oral Maxillofac Surg 2020; 49:1232-1241. [PMID: 32204964 DOI: 10.1016/j.ijom.2020.02.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 08/19/2019] [Revised: 01/10/2020] [Accepted: 02/26/2020] [Indexed: 11/28/2022]
Abstract
The aim of this study was to evaluate the intuitive placement of titanium miniplates. The hypothesis was that virtual planning can improve miniplate placement. Twenty patients were included in the study. These patients were fitted with 21 titanium miniplates (16 y-plates, three t-plates, and two u-plates) to retain nasal prostheses between 2005 and 2017. Colour-coded topographic bone thickness maps (TBTMs) were created in fused pre- and postoperative computed tomography. Implants were virtually transposed at the position of highest bone thickness. The bone thickness index (BTI) was calculated as the sum of points assigned at each screw (1 point per millimetre up to 4 mm, and 5 points for greater values) divided by the number of screws. One plate broke after 2.8 years, thus plate survival after 5 years was 91% using the Kaplan-Meier method. The BTI for all 21 plates increased from 3.4 to 4.1 points using virtual transposition (P<0.001). No significant changes were observed in t- and u-plates, but the median BTI increased from 3.1 to 4.1 points (P<0.0005) in 16 y-plates. The change was substantial (≥0.5 points) in 9/16 y-plates. Therefore, the hypothesis that virtual planning improves implant placement was accepted.
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Affiliation(s)
- K Zaoui
- Department of Otorhinolaryngology, University Hospital Heidelberg, Germany
| | - A Jung
- Department of Otorhinolaryngology, University Hospital Heidelberg, Germany
| | - W Wimmer
- Hearing Research Laboratory, ARTORG Center for Biomedical Engineering Research, University of Bern, Switzerland; Department of Otolaryngology, Bern University Hospital, Inselspital, University of Bern, Switzerland
| | - M Engel
- Department of Oral and Maxillofacial Surgery, University Hospital Heidelberg, Germany
| | - M A Möhlenbruch
- Department of Neuroradiology, University Hospital Heidelberg, Germany
| | - P A Federspil
- Department of Otorhinolaryngology, University Hospital Heidelberg, Germany.
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Frank U, Kublik S, Mayer D, Engel M, Schloter M, Durner J, Gaupels F. A T-DNA mutant screen that combines high-throughput phenotyping with the efficient identification of mutated genes by targeted genome sequencing. BMC Plant Biol 2019; 19:539. [PMID: 31801481 PMCID: PMC6894221 DOI: 10.1186/s12870-019-2162-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 11/26/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Nitrogen dioxide (NO2) triggers hypersensitive response (HR)-like cell death in Arabidopsis thaliana. A high-throughput mutant screen was established to identify genes involved in this type of programmed cell death. RESULTS Altogether 14,282 lines of SALK T-DNA insertion mutants were screened. Growing 1000 pooled mutant lines per tray and simultaneous NO2 fumigation of 4 trays in parallel facilitated high-throughput screening. Candidate mutants were selected based on visible symptoms. Sensitive mutants showed lesions already after fumigation for 1 h with 10 ppm (ppm) NO2 whereas tolerant mutants were hardly damaged even after treatment with 30 ppm NO2. Identification of T-DNA insertion sites by adapter ligation-mediated PCR turned out to be successful but rather time consuming. Therefore, next generation sequencing after T-DNA-specific target enrichment was tested as an alternative screening method. The targeted genome sequencing was highly efficient due to (1.) combination of the pooled DNA from 124 candidate mutants in only two libraries, (2.) successful target enrichment using T-DNA border-specific 70mer probes, and (3.) stringent filtering of the sequencing reads. Seventy mutated genes were identified by at least 3 sequencing reads. Ten corresponding mutants were re-screened of which 8 mutants exhibited NO2-sensitivity or -tolerance confirming that the screen yielded reliable results. Identified candidate genes had published functions in HR, pathogen resistance, and stomata regulation. CONCLUSIONS The presented NO2 dead-or-alive screen combined with next-generation sequencing after T-DNA-specific target enrichment was highly efficient. Two researchers finished the screen within 3 months. Moreover, the target enrichment approach was cost-saving because of the limited number of DNA libraries and sequencing runs required. The experimental design can be easily adapted to other screening approaches e.g. involving high-throughput treatments with abiotic stressors or phytohormones.
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Affiliation(s)
- Ulrike Frank
- Institute of Biochemical Plant Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Susanne Kublik
- Research Unit for Comparative Microbiome Analysis, Helmholtz Zentrum München, Neuherberg, Germany
| | - Dörte Mayer
- Institute of Biochemical Plant Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Marion Engel
- Scientific Computing Research Unit, Helmholtz Zentrum München, Neuherberg, Germany
| | - Michael Schloter
- Research Unit for Comparative Microbiome Analysis, Helmholtz Zentrum München, Neuherberg, Germany
| | - Jörg Durner
- Institute of Biochemical Plant Pathology, Helmholtz Zentrum München, Neuherberg, Germany
- Chair of Biochemical Plant Pathology, Technische Universität München, Freising, Germany
| | - Frank Gaupels
- Institute of Biochemical Plant Pathology, Helmholtz Zentrum München, Neuherberg, Germany.
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11
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Moratin J, Metzger K, Kansy K, Ristow O, Engel M, Hoffmann J, Flechtenmacher C, Freier K, Freudlsperger C, Horn D. The prognostic significance of the lymph node ratio in oral cancer differs for anatomical subsites. Int J Oral Maxillofac Surg 2019; 49:558-563. [PMID: 31740138 DOI: 10.1016/j.ijom.2019.10.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 05/16/2019] [Revised: 09/10/2019] [Accepted: 10/21/2019] [Indexed: 11/15/2022]
Abstract
The aim of this study was to validate the prognostic significance of the lymph node ratio (LNR) in patients suffering from oral squamous cell carcinoma in regard to different anatomical subsites. A cohort of 430 patients was investigated to determine the rates of primary metastasis and local and regional disease recurrence. Correlation analysis of the LNR with relevant clinical and pathological parameters was performed. Receiver operating characteristic (ROC) curve analysis was conducted to evaluate the prognostic impact for different subsites. Significantly differing rates of primary metastasis and loco-regional disease recurrence were found for cancer of different anatomical subsites of the head and neck. Furthermore, ROC curve analysis suggested that LNR has prognostic relevance in subsets of cancer (tongue, P< 0.001; alveolar process, P= 0.04; maxilla, P= 0.03; buccal mucosa, P= 0.02). The LNR of cancer located in the soft palate (P= 0.6) and floor of the mouth (P= 0.11) showed little or no association with the clinical outcome. There is the need for a more sensitive consideration of the LNR as a factor in the assessment of risk and the treatment decision, as the anatomical subsite plays a crucial role in its impact on the clinical outcome.
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Affiliation(s)
- J Moratin
- Department of Oral and Craniomaxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany.
| | - Karl Metzger
- Department of Oral and Craniomaxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - K Kansy
- Department of Oral and Craniomaxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - O Ristow
- Department of Oral and Craniomaxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - M Engel
- Department of Oral and Craniomaxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - J Hoffmann
- Department of Oral and Craniomaxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - C Flechtenmacher
- Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany
| | - K Freier
- Department of Oral and Craniomaxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany; Department of Oral and Craniomaxillofacial Surgery, Saarland University Hospital, Homburg, Germany
| | - C Freudlsperger
- Department of Oral and Craniomaxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - D Horn
- Department of Oral and Craniomaxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany; Department of Oral and Craniomaxillofacial Surgery, Saarland University Hospital, Homburg, Germany
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12
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Engel M, Mathews A, House L, El Zein A, Shelnutt K. Differences in Perceived and Measured Food Security Status of College Students. J Acad Nutr Diet 2019. [DOI: 10.1016/j.jand.2019.08.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Kansy K, Hoffmann J, Alhalabi O, Mistele N, Freier K, Shavlokhova V, Mertens C, Freudlsperger C, Engel M. Long-term donor site morbidity in head and neck cancer patients and its impact on quality of life: a cross-sectional study. Int J Oral Maxillofac Surg 2019; 48:875-885. [PMID: 30718032 DOI: 10.1016/j.ijom.2019.01.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 06/22/2018] [Revised: 12/31/2018] [Accepted: 01/14/2019] [Indexed: 10/27/2022]
Abstract
Modern head and neck reconstructive surgery offers a multitude of different reconstructive options. In such cases, donor site morbidity is an important factor in the affected patient's decision-making. The aim of this study was to perform an objective comparison of donor site morbidity for the five most frequent microvascular donor sites in head and neck reconstructive surgery (radial forearm, anterolateral thigh, fibula, iliac crest, and scapula) using a uniform testing system. In this cross-sectional study, 117 donor sites were analyzed (106 for malignant disease and 11 for non-malignant disease): 73 radial forearm, 14 scapula, 12 anterolateral thigh, 10 fibula, and eight iliac crest. Testing consisted of range of motion, muscle strength, and sensation. The non-affected side served as the control. Quality of life was assessed using the Washington Quality of Life Questionnaire version 4 in its German translation. Range of motion was restricted in 15 cases (12.8%). Muscle strength was decreased in 58 cases (49.6%). Sensation was reduced in 70 cases (60%). Concerning quality of life, 31.2% of patients were limited in their daily activities. The scapula flap showed the highest incidence of overall donor site morbidity. However, correlation between objective and subjective donor site impairment was weak and the majority of patients experienced only minor limitations.
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Affiliation(s)
- K Kansy
- Department of Oral and Maxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany.
| | - J Hoffmann
- Department of Oral and Maxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - O Alhalabi
- Department of Oral and Maxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - N Mistele
- Department of Oral and Maxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - K Freier
- Department of Oral and Maxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - V Shavlokhova
- Department of Oral and Maxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - C Mertens
- Department of Oral and Maxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - C Freudlsperger
- Department of Oral and Maxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - M Engel
- Department of Oral and Maxillofacial Surgery, Heidelberg University Hospital, Heidelberg, Germany
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14
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Simon LM, Karg S, Westermann AJ, Engel M, Elbehery AHA, Hense B, Heinig M, Deng L, Theis FJ. MetaMap: an atlas of metatranscriptomic reads in human disease-related RNA-seq data. Gigascience 2018; 7:5036539. [PMID: 29901703 PMCID: PMC6025204 DOI: 10.1093/gigascience/giy070] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [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] [Indexed: 01/12/2023] Open
Abstract
Background With the advent of the age of big data in bioinformatics, large volumes of data and high-performance computing power enable researchers to perform re-analyses of publicly available datasets at an unprecedented scale. Ever more studies imply the microbiome in both normal human physiology and a wide range of diseases. RNA sequencing technology (RNA-seq) is commonly used to infer global eukaryotic gene expression patterns under defined conditions, including human disease-related contexts; however, its generic nature also enables the detection of microbial and viral transcripts. Findings We developed a bioinformatic pipeline to screen existing human RNA-seq datasets for the presence of microbial and viral reads by re-inspecting the non-human-mapping read fraction. We validated this approach by recapitulating outcomes from six independent, controlled infection experiments of cell line models and compared them with an alternative metatranscriptomic mapping strategy. We then applied the pipeline to close to 150 terabytes of publicly available raw RNA-seq data from more than 17,000 samples from more than 400 studies relevant to human disease using state-of-the-art high-performance computing systems. The resulting data from this large-scale re-analysis are made available in the presented MetaMap resource. Conclusions Our results demonstrate that common human RNA-seq data, including those archived in public repositories, might contain valuable information to correlate microbial and viral detection patterns with diverse diseases. The presented MetaMap database thus provides a rich resource for hypothesis generation toward the role of the microbiome in human disease. Additionally, codes to process new datasets and perform statistical analyses are made available.
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Affiliation(s)
- L M Simon
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Computational Biology, Neuherberg, Germany
| | - S Karg
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Computational Biology, Neuherberg, Germany
| | - A J Westermann
- Institute of Molecular Infection Biology, University of Würzburg, Würzburg, Germany.,Helmholtz Institute for RNA-Based Infection Research, Würzburg, Germany
| | - M Engel
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Computational Biology, Neuherberg, Germany.,Helmholtz Zentrum München, German Research Center for Environmental Health, Scientific Computing Research Unit, Neuherberg, Germany
| | - A H A Elbehery
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Virology, Neuherberg, Germany
| | - B Hense
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Computational Biology, Neuherberg, Germany
| | - M Heinig
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Computational Biology, Neuherberg, Germany
| | - L Deng
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Virology, Neuherberg, Germany
| | - F J Theis
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Computational Biology, Neuherberg, Germany.,Department of Mathematics, Technische Universität München, Munich, Germany
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15
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Alfaro-Moreno E, Engel M, de Marco G, Kos VM. Evaluation of tight junction disruption induced particles on airway epithelial cells using an automatized imaging method. Toxicol Lett 2018. [DOI: 10.1016/j.toxlet.2018.06.910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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16
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Engel M, Bayer H, Ulber R, Tippkötter N. Kommt es in Elektrofermentationen mit Clostridium acetobutylicum
zu einer Eisenlimitierung? CHEM-ING-TECH 2018. [DOI: 10.1002/cite.201855047] [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: 11/08/2022]
Affiliation(s)
- M. Engel
- TU Kaiserslautern; Lehrgebiet Bioverfahrenstechnik; Gottlieb-Daimler-Straße 49 67663 Kaiserslautern Deutschland
| | - H. Bayer
- TU Kaiserslautern; Lehrgebiet Bioverfahrenstechnik; Gottlieb-Daimler-Straße 49 67663 Kaiserslautern Deutschland
| | - R. Ulber
- TU Kaiserslautern; Lehrgebiet Bioverfahrenstechnik; Gottlieb-Daimler-Straße 49 67663 Kaiserslautern Deutschland
| | - N. Tippkötter
- FH Aachen; Lehrgebiet Bioverfahrenstechnik; Heinrich-Mußmann-Straße 1 52428 Jülich Deutschland
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17
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Engel M, Pundt N, Stang A, Erbel R, Moebus S. Intra-individual fluctuation patterns of depressive symptoms assessed over 12 years. Das Gesundheitswesen 2018. [DOI: 10.1055/s-0038-1667809] [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: 10/28/2022]
Affiliation(s)
- M Engel
- Institut für Medizinische Informatik, Biometrie und Epidemiologie, Essen, Deutschland
| | - N Pundt
- Institut für Medizinische Informatik, Biometrie und Epidemiologie, Essen, Deutschland
| | - A Stang
- Institut für Medizinische Informatik, Biometrie und Epidemiologie, Essen, Deutschland
- Zentrum für Klinische Epidemiologie, Essen, Deutschland
| | - R Erbel
- Institut für Medizinische Informatik, Biometrie und Epidemiologie, Essen, Deutschland
| | - S Moebus
- Institut für Medizinische Informatik, Biometrie und Epidemiologie, Essen, Deutschland
- Zentrum für Urbane Epidemiologie, Essen, Deutschland
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18
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Beck E, Doherty D, Bleecker ER, Moroni-Zentgraf P, Engel M, Mueller A, Kerstjens HAM. Tiotropium Respimat®: efficacy in elderly asthma patients. Pneumologie 2018. [DOI: 10.1055/s-0037-1619203] [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: 10/28/2022]
Affiliation(s)
- E Beck
- IFG Institut für Gesundheitsförderung, Rüdersdorf
| | | | - ER Bleecker
- Wake Forest School of Medicine, Winston-Salem, NC, USA
| | | | - M Engel
- Boehringer Ingelheim, Ingelheim
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19
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Kostric M, Milger K, Krauss-Etschmann S, Engel M, Vestergaard G, Schloter M, Schöler A. Development of a Stable Lung Microbiome in Healthy Neonatal Mice. Microb Ecol 2018; 75:529-542. [PMID: 28905200 DOI: 10.1007/s00248-017-1068-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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: 05/26/2017] [Accepted: 09/05/2017] [Indexed: 06/07/2023]
Abstract
The lower respiratory tract has been previously considered sterile in a healthy state, but advances in culture-independent techniques for microbial identification and characterization have revealed that the lung harbors a diverse microbiome. Although research on the lung microbiome is increasing and important questions were already addressed, longitudinal studies aiming to describe developmental stages of the microbial communities from the early neonatal period to adulthood are lacking. Thus, little is known about the early-life development of the lung microbiome and the impact of external factors during these stages. In this study, we applied a barcoding approach based on high-throughput sequencing of 16S ribosomal RNA gene amplicon libraries to determine age-dependent differences in the bacterial fraction of the murine lung microbiome and to assess potential influences of differing "environmental microbiomes" (simulated by the application of used litter material to the cages). We could clearly show that the diversity of the bacterial community harbored in the murine lung increases with age. Interestingly, bacteria belonging to the genera Delftia and Rhodococcus formed an age-independent core microbiome. The addition of the used litter material influenced the lung microbiota of young mice but did not significantly alter the community composition of adult animals. Our findings elucidate the dynamic nature of the early-life lung microbiota and its stabilization with age. Further, this study indicates that even slight environmental changes modulate the bacterial community composition of the lung microbiome in early life, whereas the lung microbes of adults demonstrate higher resilience towards environmental variations.
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Affiliation(s)
- Matea Kostric
- Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85716, Neuherberg, Germany
| | - Katrin Milger
- Department of Internal Medicine V, University of Munich, Comprehensive Pneumology Center, Member of the German Center for Lung Research (DZL), Munich, Germany
- Institute of Lung Biology and Disease (ILBD), Helmholtz Center Munich, Comprehensive Pneumology Center (CPC-M), Munich, Germany
| | - Susanne Krauss-Etschmann
- Division of Experimental Asthma Research, Research Center Borstel, Leibniz-Center for Medicine and Biosciences, Member of the German Center for Lung Research (DZL), Parkallee 1-40, 23845, Borstel, Germany
- Institute for Experimental Medicine, Christian-Albrechts-Universität zu Kiel, Niemannsweg 11, 24105, Kiel, Germany
| | - Marion Engel
- Research Unit Scientific Computing, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85716, Neuherberg, Germany
| | - Gisle Vestergaard
- Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85716, Neuherberg, Germany
| | - Michael Schloter
- Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85716, Neuherberg, Germany.
- ZIEL Institute for Food and Health, Technische Universität München, Weihenstephaner Berg 1, 85354, Freising, Germany.
| | - Anne Schöler
- Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85716, Neuherberg, Germany
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20
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Engel M, Chen A. The emerging role of mRNA methylation in normal and pathological behavior. Genes Brain Behav 2017; 17:e12428. [PMID: 29027751 DOI: 10.1111/gbb.12428] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 10/02/2017] [Accepted: 10/09/2017] [Indexed: 12/11/2022]
Abstract
Covalent RNA modifications were recently rediscovered as abundant RNA chemical tags. Similarly to DNA epigenetic modifications, they have been proposed as essential regulators of gene expression. Here we focus on 3 of the most abundant adenosine methylations: N6-methyladenosine (m6 A), N6,2'-O-dimethyladenosine (m6 Am) and N1-methyladenosine (m1 A). We review the potential role of these modifications on mature mRNA in regulating gene expression within the adult brain, nervous system function and normal and pathological behavior. Dynamic mRNA modifications, summarized as the epitranscriptome, regulate transcript maturation, translation and decay, and thus crucially determine gene expression beyond primary transcription regulation. However, the extent of this regulation in the healthy and maladapted adult brain is poorly understood. Analyzing this novel layer of gene expression control in addition to epigenetics and posttranslational regulation of proteins will be highly relevant for understanding the molecular underpinnings of behavior and psychiatric disorders.
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Affiliation(s)
- M Engel
- Department of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, Munich, Germany
| | - A Chen
- Department of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, Munich, Germany.,Department of Neurobiology, Weizmann Institute of Science, Rehovot, Israel
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21
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Engel M, Endesfelder D, Schloter-Hai B, Kublik S, Granitsiotis MS, Boschetto P, Stendardo M, Barta I, Dome B, Deleuze JF, Boland A, Müller-Quernheim J, Prasse A, Welte T, Hohlfeld J, Subramanian D, Parr D, Gut IG, Greulich T, Koczulla AR, Nowinski A, Gorecka D, Singh D, Gupta S, Brightling CE, Hoffmann H, Frankenberger M, Hofer TP, Burggraf D, Heiss-Neumann M, Ziegler-Heitbrock L, Schloter M, zu Castell W. Influence of lung CT changes in chronic obstructive pulmonary disease (COPD) on the human lung microbiome. PLoS One 2017; 12:e0180859. [PMID: 28704452 PMCID: PMC5509234 DOI: 10.1371/journal.pone.0180859] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [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: 05/13/2016] [Accepted: 06/22/2017] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Changes in microbial community composition in the lung of patients suffering from moderate to severe COPD have been well documented. However, knowledge about specific microbiome structures in the human lung associated with CT defined abnormalities is limited. METHODS Bacterial community composition derived from brush samples from lungs of 16 patients suffering from different CT defined subtypes of COPD and 9 healthy subjects was analyzed using a cultivation independent barcoding approach applying 454-pyrosequencing of 16S rRNA gene fragment amplicons. RESULTS We could show that bacterial community composition in patients with changes in CT (either airway or emphysema type changes, designated as severe subtypes) was different from community composition in lungs of patients without visible changes in CT as well as from healthy subjects (designated as mild COPD subtype and control group) (PC1, Padj = 0.002). Higher abundance of Prevotella in samples from patients with mild COPD subtype and from controls and of Streptococcus in the severe subtype cases mainly contributed to the separation of bacterial communities of subjects. No significant effects of treatment with inhaled glucocorticoids on bacterial community composition were detected within COPD cases with and without abnormalities in CT in PCoA. Co-occurrence analysis suggests the presence of networks of co-occurring bacteria. Four communities of positively correlated bacteria were revealed. The microbial communities can clearly be distinguished by their associations with the CT defined disease phenotype. CONCLUSION Our findings indicate that CT detectable structural changes in the lung of COPD patients, which we termed severe subtypes, are associated with alterations in bacterial communities, which may induce further changes in the interaction between microbes and host cells. This might result in a changed interplay with the host immune system.
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Affiliation(s)
- Marion Engel
- Scientific Computing Research Unit, Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany
- Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, Neuherberg, Germany
| | - David Endesfelder
- Scientific Computing Research Unit, Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Brigitte Schloter-Hai
- Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, Neuherberg, Germany
| | - Susanne Kublik
- Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, Neuherberg, Germany
| | - Michael S. Granitsiotis
- Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, Neuherberg, Germany
| | - Piera Boschetto
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | | | - Imre Barta
- Department of Pathophysiology, National Koranyi Institute for TB and Pulmonology, Budapest, Hungary
| | - Balazs Dome
- Department of Pathophysiology, National Koranyi Institute for TB and Pulmonology, Budapest, Hungary
| | | | - Anne Boland
- Centre National de Génotypage, Institut de Génomique, CEA, Evry, France
| | | | - Antje Prasse
- Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany
- Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Tobias Welte
- Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany
- Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Jens Hohlfeld
- Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany
- Member of the German Center for Lung Research (DZL), Giessen, Germany
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany
| | - Deepak Subramanian
- Department of Respiratory Medicine, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, United Kingdom
| | - David Parr
- Department of Respiratory Medicine, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, United Kingdom
| | - Ivo Glynne Gut
- CNAG-CRG, Centre for Genomic Regulation, Barcelona Institute for Science and Technology, Barcelona, Spain
| | - Timm Greulich
- Member of the German Center for Lung Research (DZL), Giessen, Germany
- Department of Medicine, Pulmonary and Critical Care Medicine, University Medical Center Giessen and Marburg Philipps-University, Marburg, Germany
| | - Andreas Rembert Koczulla
- Member of the German Center for Lung Research (DZL), Giessen, Germany
- Department of Medicine, Pulmonary and Critical Care Medicine, University Medical Center Giessen and Marburg Philipps-University, Marburg, Germany
| | - Adam Nowinski
- Second Department of Respiratory Medicine, National Tuberculosis and Lung Diseases Research Institute, Warsaw, Poland
| | - Dorota Gorecka
- Second Department of Respiratory Medicine, National Tuberculosis and Lung Diseases Research Institute, Warsaw, Poland
| | - Dave Singh
- University of Manchester, Medicines Evaluation Unit and University Hospital of South Manchester Foundation Trust, Manchester, United Kingdom
| | - Sumit Gupta
- Institute for Lung Health, Department of Infection, Immunity and Inflammation, University of Leicester, Leicester, United Kingdom
| | - Christopher E. Brightling
- Institute for Lung Health, Department of Infection, Immunity and Inflammation, University of Leicester, Leicester, United Kingdom
| | - Harald Hoffmann
- Institute of Microbiology and Laboratory Medicine, Synlab MVZ Gauting & IML red GmbH, Gauting, Germany
| | - Marion Frankenberger
- CPC Comprehensive Pneumology Center, Helmholtz Zentrum München, Ludwig-Maximilians Universität und Asklepios Klinik Gauting, Munich, Germany
| | - Thomas P. Hofer
- EvA Study Center, Helmholtz Zentrum Muenchen, Gauting, Germany
| | | | | | | | - Michael Schloter
- Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, Neuherberg, Germany
| | - Wolfgang zu Castell
- Scientific Computing Research Unit, Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany
- Department of Mathematics, Technische Universität München, Munich, Germany
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Ketelaar ME, Van De Kant K, Dijk FN, Klaassen EMM, Grotenboer N, Nawijn MC, Dompeling E, Koppelman GH, Murray C, Foden P, Lowe L, Durrington H, Custovic A, Simpson A, Simpson AJ, Shaw DE, Sousa AR, Fleming LJ, Roberts G, Pandis I, Bansal AT, Corfield J, Wagers S, Djukanovic R, Chung KF, Sterk PJ, Vestbo J, Fowler SJ, Tebbutt SJ, Singh A, Shannon CP, Kim YW, Yang CX, Gauvreau GM, Fitzgerald JM, Boulet LP, O’Byrne PM, Begley N, Loudon A, Ray DW, Baos S, Cremades L, Calzada D, Lahoz C, Cárdaba B, Asosingh K, Lauruschkat C, Queisser K, Wanner N, Weiss K, Xu W, Erzurum S, Sokolowska M, Chen LY, Liu Y, Martinez-Anton A, Logun C, Alsaaty S, Cuento R, Cai R, Sun J, Quehenberger O, Armando A, Dennis E, Levine S, Shelhamer J, Choi K, Lazova S, Perenovska P, Miteva D, Priftis S, Petrova G, Yablanski V, Vlaev E, Rafailova H, Kumae T, Holmes LJ, Yorke J, Ryan DM, Chinratanapisit S, Matchimmadamrong K, Deerojanawong J, Karoonboonyanan W, Sritipsukho P, Youroukova V, Dimitrova D, Slavova Y, Lesichkova S, Tzocheva I, Parina S, Angelova S, Korsun N, Craiu M, Stan IV, Deliu M, Yavuz T, Sperrin M, Sahiner UM, Belgrave D, Sackesen CS, Kalayci Ö, Velikov P, Velikova T, Ivanova-Todorova E, Tumangelova-Yuzeir K, Kyurkchiev D, Megremis S, Constantinides B, Sotiropoulos AG, Xepapadaki P, Robertson D, Papadopoulos N, Wilkinson M, Portsmouth C, Ray D, Goodacre R, Valerieva A, Bobolea I, Vera DG, Gonzalez-Salazar G, Moreno CM, Rodriguez CF, De Las Cuevas Moreno N, Wang R, Satia I, Niven R, Smith JA, Southworth T, Plumb J, Gupta V, Pearson J, Ramis I, Lehner MD, Miralpeix M, Singh D, Satia I, Woodhead M, O’Byrne P, Smith JA, Forss C, Cook P, Brown S, Svedberg F, Stephenson K, Bertuzzi M, Bignell E, Enerbäck M, Cunoosamy D, Macdonald A, Liu C, Zhu L, Fukuda K, Zhang C, Ouyang S, Chen X, Qin L, Rachakonda S, Aronica M, Qin J, Li X, Larose MC, Archambault AS, Provost V, Chakir J, Laviolette M, Flamand N, Logan N, Ruckerl D, Allen JE, Sutherland TE, Hamelmann E, Vogelberg C, Goldstein S, Azzi GE, Engel M, Sigmund R, Szefler SJ, Mesquita R, Coentrão L, Veiga R, Paiva JA, Roncon-Albuquerque R, Porras WV, Moreno AG, Iglesias JM, Ramos GC, Acevedo YP, Alonso MAT, Del Mar Moro Moro M, Krcmova I, Novosad J, Hanania NA, Massanari M, Hecker H, Kassel E, Laforce C, Rickard K, Snelder S, Braunstahl GJ, Jones TL, Neville D, Heiden ER, Lanning E, Brown T, Rupani H, Babu KS, Chauhan AJ, Eldegeir MY, Chapman AA, Ferwana M, Caldron M. Abstracts from the 3rd International Severe Asthma Forum (ISAF). Clin Transl Allergy 2017. [PMCID: PMC5461526 DOI: 10.1186/s13601-017-0149-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Hamelmann E, Szefler SJ, Bernstein JA, Murphy K, El Azzi G, Engel M, Moroni-Zentgraf P, Sigmund R. Efficacy of tiotropium in patients aged 6 – 17 years with severe symptomatic asthma. Pneumologie 2017. [DOI: 10.1055/s-0037-1598379] [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: 10/20/2022]
Affiliation(s)
- E Hamelmann
- Department of Pediatrics, Evangelisches Krankenhaus Bielefeld and Allergy Center of the Ruhr University Bochum
| | - SJ Szefler
- Department of Pediatrics, Children's Hospital Colorado and the University of Colorado School of Medicine
| | - JA Bernstein
- Uc Allergy Clinical Research Center, University of Cincinnati College of Medicine
| | - K Murphy
- Boys Town National Research Hospital, Boys Town Ne
| | - G El Azzi
- Boehringer Ingelheim Pharma GmbH & Co. KG
| | - M Engel
- Boehringer Ingelheim Pharma GmbH & Co. KG
| | | | - R Sigmund
- Boehringer Ingelheim Pharma GmbH & Co. KG
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Vogelberg C, Szefler SJ, Hamelmann E, Boner A, Moroni-Zentgraf P, Engel M, El Azzi G, Finnigan H, Vandewalker M. Safety of tiotropium Respimat add-on therapy in patients aged 6 – 17 years with symptomatic asthma. Pneumologie 2017. [DOI: 10.1055/s-0037-1598380] [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: 10/20/2022]
Affiliation(s)
- C Vogelberg
- Klinik für Kinder- und Jugendmedizin, Universitätsklinikum Carl Gustav Carus
| | - SJ Szefler
- Department of Pediatrics, Children's Hospital of Colorado and the University of Colorado Denver School of Medicine
| | - E Hamelmann
- Evangelisches Krankenhaus Bielefeld and Allergy Center of the Ruhr University, Bochum
| | - A Boner
- Pediatric Department, University of Verona
| | | | - M Engel
- Ta Respiratory Diseases, Boehringer Ingelheim Pharma GmbH & Co. KG
| | - G El Azzi
- Ta Respiratory Diseases, Boehringer Ingelheim Pharma GmbH & Co. KG
| | - H Finnigan
- Biostatistics and Data Sciences, Boehringer Ingelheim Ltd
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De Blic J, Goldstein S, Szefler S, Vogelberg C, Bensch G, Given J, Azzi GE, Moroni-Zentgraf P, Engel M. Tiotropium Respimat® une prise par jour en add-on de traitement dans l’asthme, améliore le DEM 25–75 % des patients adolescents ayant un asthme persistant symptomatique. Rev Mal Respir 2017. [DOI: 10.1016/j.rmr.2016.10.650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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De Blic J, Szefler S, Rupp N, Boner A, Azzi GE, Moroni-Zentgraf P, Engel M, Hamelmann E. Sécurité et tolérance de Tiotropium Respimat® une prise par jour en add on de traitement chez des enfants de 6–11 ans ayant un asthme sévère symptomatique. Rev Mal Respir 2017. [DOI: 10.1016/j.rmr.2016.10.093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Birzele LT, Depner M, Ege MJ, Engel M, Kublik S, Bernau C, Loss GJ, Genuneit J, Horak E, Schloter M, Braun-Fahrländer C, Danielewicz H, Heederik D, von Mutius E, Legatzki A. Environmental and mucosal microbiota and their role in childhood asthma. Allergy 2017; 72:109-119. [PMID: 27503830 DOI: 10.1111/all.13002] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/06/2016] [Indexed: 12/27/2022]
Abstract
BACKGROUND High microbial diversity in the environment has been associated with lower asthma risk, particularly in children exposed to farming. It remains unclear whether this effect operates through an altered microbiome of the mucosal surfaces of the airways. METHODS DNA from mattress dust and nasal samples of 86 school age children was analyzed by 454 pyrosequencing of the 16S rRNA gene fragments. Based on operational taxonomic units (OTUs), bacterial diversity and composition were related to farm exposure and asthma status. RESULTS Farm exposure was positively associated with bacterial diversity in mattress dust samples as determined by richness (P = 8.1 × 10-6 ) and Shannon index (P = 1.3 × 10-5 ). Despite considerable agreement of richness between mattress and nasal samples, the association of richness with farming in nasal samples was restricted to a high gradient of farm exposure, that is, exposure to cows and straw vs no exposure at all. In mattress dust, the genera Clostridium, Facklamia, an unclassified genus within the family of Ruminococcaceae, and six OTUs were positively associated with farming. Asthma was inversely associated with richness [aOR = 0.48 (0.22-1.02)] and Shannon index [aOR = 0.41 (0.21-0.83)] in mattress dust and to a lower extent in nasal samples [richness aOR 0.63 = (0.38-1.06), Shannon index aOR = 0.66 (0.39-1.12)]. CONCLUSION The stronger inverse association of asthma with bacterial diversity in mattress dust as compared to nasal samples suggests microbial involvement beyond mere colonization of the upper airways. Whether inhalation of metabolites of environmental bacteria contributes to this phenomenon should be the focus of future research.
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Affiliation(s)
- L. T. Birzele
- Dr. von Hauner Children's Hospital; LMU Munich; Munich Germany
| | - M. Depner
- Dr. von Hauner Children's Hospital; LMU Munich; Munich Germany
| | - M. J. Ege
- Dr. von Hauner Children's Hospital; LMU Munich; Munich Germany
- Member of the German Center for Lung Research (DZL); Munich Germany
| | - M. Engel
- Research Unit Scientific Computing; Helmholtz Center Munich; Neuherberg Germany
- Research Unit for Environmental Genomics; Helmholtz Center Munich; Neuherberg Germany
| | - S. Kublik
- Research Unit for Environmental Genomics; Helmholtz Center Munich; Neuherberg Germany
| | - C. Bernau
- Leibniz Supercomputing Center of the Bavarian Academy of Sciences and Humanities; Garching Germany
| | - G. J. Loss
- Dr. von Hauner Children's Hospital; LMU Munich; Munich Germany
- Department of Pediatrics; School of Medicine; University of California; San Diego CA USA
| | - J. Genuneit
- Institute of Epidemiology and Medical Biometry; Ulm University; Ulm Germany
| | - E. Horak
- Division of Cardiology and Pulmonology; Department of Pediatrics and Adolescents; Innsbruck Medical University; Innsbruck Austria
| | - M. Schloter
- Research Unit for Environmental Genomics; Helmholtz Center Munich; Neuherberg Germany
| | - C. Braun-Fahrländer
- Swiss Tropical and Public Health Institute; Basel Switzerland
- Department of Epidemiology and Public Health; University of Basel; Basel Switzerland
| | - H. Danielewicz
- Department of Pediatrics, Allergology and Cardiology; Wroclaw Medical University; Wroclaw Poland
| | - D. Heederik
- Division of Environmental Epidemiology; Institute for Risk Assessment Sciences; University of Utrecht; Utrecht The Netherlands
| | - E. von Mutius
- Dr. von Hauner Children's Hospital; LMU Munich; Munich Germany
- Member of the German Center for Lung Research (DZL); Munich Germany
| | - A. Legatzki
- Dr. von Hauner Children's Hospital; LMU Munich; Munich Germany
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Bisgaard H, Vandewalker M, Graham L, Moroni-Zentgraf P, Engel M, Azzi GE, Vulcu SD, Finnigan H, Vrijlandt EJLE. P154 Safety of tiotropium in pre-school children with symptomatic persistent asthma. Thorax 2016. [DOI: 10.1136/thoraxjnl-2016-209333.297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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Schmidt O, Hamelmann E, Vogelberg C, Laki I, Azzi GE, Engel M, Moroni-Zentgraf P, Finnigan H, Vandewalker M. P156 Efficacy, safety and tolerability of once-daily tiotropium respimat® add-on therapy in children with moderate symptomatic asthma. Thorax 2016. [DOI: 10.1136/thoraxjnl-2016-209333.299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Vogelberg C, Szefler SJ, Hamelmann E, Boner A, Moroni-Zentgraf P, Engel M, Azzi GE, Finnigan H, Vandewalker M. P155 Safety of tiotropium respimat® add-on therapy in patients aged 6–17 years with symptomatic asthma. Thorax 2016. [DOI: 10.1136/thoraxjnl-2016-209333.298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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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Engel M, Tippkötter N. Einfluss eines Phenazin-Mediators und elektrischen Potenzials auf die Aceton-Butanol-Ethanol-Fermentation. CHEM-ING-TECH 2016. [DOI: 10.1002/cite.201650105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bergkemper F, Schöler A, Engel M, Lang F, Krüger J, Schloter M, Schulz S. Phosphorus depletion in forest soils shapes bacterial communities towards phosphorus recycling systems. Environ Microbiol 2016; 18:2767. [DOI: 10.1111/1462-2920.13442] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Talk A, Kublik S, Uksa M, Engel M, Berghahn R, Welzl G, Schloter M, Mohr S. Effects of multiple but low pesticide loads on aquatic fungal communities colonizing leaf litter. J Environ Sci (China) 2016; 46:116-125. [PMID: 27521943 DOI: 10.1016/j.jes.2015.11.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 08/27/2015] [Accepted: 11/19/2015] [Indexed: 06/06/2023]
Abstract
In the first tier risk assessment (RA) of pesticides, risk for aquatic communities is estimated by using results from standard laboratory tests with algae, daphnids and fish for single pesticides such as herbicides, fungicides, and insecticides. However, fungi as key organisms for nutrient cycling in ecosystems as well as multiple pesticide applications are not considered in the RA. In this study, the effects of multiple low pesticide pulses using regulatory acceptable concentrations (RACs) on the dynamics of non-target aquatic fungi were investigated in a study using pond mesocosm. For that, fungi colonizing black alder (Alnus glutinosa) leaves were exposed to multiple, low pulses of 11 different pesticides over a period of 60days using a real farmer's pesticide application protocol for apple cropping. Four pond mesocosms served as treatments and 4 as controls. The composition of fungal communities colonizing the litter material was analyzed using a molecular fingerprinting approach based on the terminal Restriction Fragment Length Polymorphism (t-RFLP) of the fungal Internal Transcribed Spacer (ITS) region of the ribonucleic acid (RNA) gene(s). Our data indicated a clear fluctuation of fungal communities based on the degree of leaf litter degradation. However significant effects of the applied spraying sequence were not observed. Consequently also degradation rates of the litter material were not affected by the treatments. Our results indicate that the nutrient rich environment of the leaf litter material gave fungal communities the possibility to express genes that induce tolerance against the applied pesticides. Thus our data may not be transferred to other fresh water habitats with lower nutrient availability.
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Affiliation(s)
- Anne Talk
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany.
| | - Susanne Kublik
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | - Marie Uksa
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | - Marion Engel
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | | | - Gerhard Welzl
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | - Michael Schloter
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany.
| | - Silvia Mohr
- Umweltbundesamt, Schichauweg 58, 12307, Berlin, Germany
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Abstract
Type 1 diabetes (T1D) is a complex autoimmune disease, and first stages of the disease typically develop early in life. Genetic as well as environmental factors are thought to contribute to the risk of developing autoimmunity against pancreatic beta cells. Several environmental factors, such as breastfeeding or early introduction of solid food, have been associated with increased risk for developing T1D. During the first years of life, the gut microbial community is shaped by the environment, in particular by dietary factors. Moreover, the gut microbiome has been described for its role in shaping the immune system early in life and early data suggest associations between T1D risk and alterations in gut microbial communities. In this article, we discuss environmental factors influencing the colonization process of the gut microbial community. Furthermore, we review possible interactions between the microbiome and the host that might contribute to the risk of developing T1D.
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Affiliation(s)
- David Endesfelder
- Scientific Computing Research Unit, Helmholtz Zentrum München, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany.
| | - Marion Engel
- Scientific Computing Research Unit, Helmholtz Zentrum München, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
| | - Wolfgang Zu Castell
- Department of Mathematics, Technische Universität München, Boltzmannstrasse 3, 85747, Garching, Germany
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El Sayed A, Ibrahim A, Elhassan H, Zuhlke L, Engel M, Karthikeyan G, Teo K, Yusuf S, Mayosi B. PM276 The Global Rheumatic Heart Disease Study (Remedy) – Data From Sudan. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Endesfelder D, Engel M, Davis-Richardson AG, Ardissone AN, Achenbach P, Hummel S, Winkler C, Atkinson M, Schatz D, Triplett E, Ziegler AG, zu Castell W. Towards a functional hypothesis relating anti-islet cell autoimmunity to the dietary impact on microbial communities and butyrate production. Microbiome 2016; 4:17. [PMID: 27114075 PMCID: PMC4845316 DOI: 10.1186/s40168-016-0163-4] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 03/22/2016] [Indexed: 05/03/2023]
Abstract
BACKGROUND The development of anti-islet cell autoimmunity precedes clinical type 1 diabetes and occurs very early in life. During this early period, dietary factors strongly impact on the composition of the gut microbiome. At the same time, the gut microbiome plays a central role in the development of the infant immune system. A functional model of the association between diet, microbial communities, and the development of anti-islet cell autoimmunity can provide important new insights regarding the role of the gut microbiome in the pathogenesis of type 1 diabetes. RESULTS A novel approach was developed to enable the analysis of the microbiome on an aggregation level between a single microbial taxon and classical ecological measures analyzing the whole microbial population. Microbial co-occurrence networks were estimated at age 6 months to identify candidates for functional microbial communities prior to islet autoantibody development. Stratification of children based on these communities revealed functional associations between diet, gut microbiome, and islet autoantibody development. Two communities were strongly associated with breast-feeding and solid food introduction, respectively. The third community revealed a subgroup of children that was dominated by Bacteroides abundances compared to two subgroups with low Bacteroides and increased Akkermansia abundances. The Bacteroides-dominated subgroup was characterized by early introduction of non-milk diet, increased risk for early autoantibody development, and by lower abundances of genes for the production of butyrate via co-fermentation of acetate. By combining our results with information from the literature, we provide a refined functional hypothesis for a protective role of butyrate in the pathogenesis of type 1 diabetes. CONCLUSIONS Based on functional traits of microbial communities estimated from co-occurrence networks, we provide evidence that alterations in the composition of mucin degrading bacteria associate with early development of anti-islet cell autoimmunity. We hypothesize that lower levels of Bacteroides in favor of increased levels of Akkermansia lead to a competitive advantage of acetogens compared to sulfate reducing bacteria, resulting in increased butyrate production via co-fermentation of acetate. This hypothesis suggests that butyrate has a protective effect on the development of anti-islet cell autoantibodies.
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Affiliation(s)
- David Endesfelder
- />Scientific Computing Research Unit, Helmholtz Zentrum München, Munich, Germany
| | - Marion Engel
- />Scientific Computing Research Unit, Helmholtz Zentrum München, Munich, Germany
| | - Austin G. Davis-Richardson
- />Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Munich, USA
| | - Alexandria N. Ardissone
- />Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Munich, USA
| | - Peter Achenbach
- />Institute of Diabetes Research, Helmholtz Zentrum München, and Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Sandra Hummel
- />Institute of Diabetes Research, Helmholtz Zentrum München, and Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Christiane Winkler
- />Institute of Diabetes Research, Helmholtz Zentrum München, and Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Mark Atkinson
- />Department of Pediatrics, University of Florida, Gainesville, FL USA
| | - Desmond Schatz
- />Department of Pediatrics, University of Florida, Gainesville, FL USA
| | - Eric Triplett
- />Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Munich, USA
| | - Anette-Gabriele Ziegler
- />Institute of Diabetes Research, Helmholtz Zentrum München, and Forschergruppe Diabetes, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Wolfgang zu Castell
- />Scientific Computing Research Unit, Helmholtz Zentrum München, Munich, Germany
- />Department of Mathematics, Technische Universität München, Munich, Germany
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Wasserman S, Engel M, Griesel R, Mendelson M. Burden of pneumocystis pneumonia in HIV-infected adults in sub-Saharan Africa: A systematic review and meta-analysis. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Seeberger R, Hoffmann J, Freudlsperger C, Berger M, Bodem J, Horn D, Engel M. Intracranial volume (ICV) in isolated sagittal craniosynostosis measured by 3D photocephalometry: A new perspective on a controversial issue. J Craniomaxillofac Surg 2016; 44:626-31. [PMID: 27017102 DOI: 10.1016/j.jcms.2016.01.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 09/30/2015] [Revised: 12/18/2015] [Accepted: 01/27/2016] [Indexed: 10/22/2022] Open
Abstract
BACKGROUND There are still controversies regarding the intracranial volumes in patients with isolated sagittal craniosynostosis compared to a healthy population. This study aimed to compare the intracranial volume of children with sagittal synostosis and scaphocephaly to an age- and gender-matched control cohort using three-dimensional (3D) photogrammetry. METHODS 62 boys and nine girls with sagittal craniosynostosis were included in this study. The intracranial volume was measured at the first clinical presentation. However, 3D photogrammetry was performed at children not younger than 3 months. The 3D photogrammetric data of 547 healthy boys and 287 healthy girls between the ages of 3-10 month was analyzed to establish an age- and gender-matched control group. RESULTS Male patients with sagittal synostosis showed a significantly reduced intracranial volume compared to the reference group. For female patients, the intracranial volume was slightly lower compared to the norm group, but not significantly. CONCLUSIONS Male children with sagittal synostosis showed significantly decreased intracranial volume between the age of 3 and 10 months compared to an age- and gender-matched control group. Female patients in the same age group presented a lower intracranial volume compared to the norm group. Measuring intracranial volume using 3D photogrammetry is a comparable and valuable alternative to CT scans that leads to a significant reduction of radiation exposure to the growing brain.
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Affiliation(s)
- R Seeberger
- Department of Oral and Cranio-Maxillofacial Surgery, University of Heidelberg, Germany
| | - J Hoffmann
- Department of Oral and Cranio-Maxillofacial Surgery, University of Heidelberg, Germany
| | - C Freudlsperger
- Department of Oral and Cranio-Maxillofacial Surgery, University of Heidelberg, Germany
| | - M Berger
- Department of Oral and Cranio-Maxillofacial Surgery, University of Heidelberg, Germany
| | - J Bodem
- Department of Oral and Cranio-Maxillofacial Surgery, University of Heidelberg, Germany
| | - D Horn
- Department of Oral and Cranio-Maxillofacial Surgery, University of Heidelberg, Germany
| | - M Engel
- Department of Oral and Cranio-Maxillofacial Surgery, University of Heidelberg, Germany.
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Beck E, Casale T, Hanania NA, Haughney J, Vandewalker M, Meltzer E, Paggiaro P, Engel M, Unseld A, Moroni-Zentgraf P, Kerstjens H. Once-daily tiotropium Respimat®: safety and tolerability results from five Phase III trials in adults with symptomatic asthma. Pneumologie 2016. [DOI: 10.1055/s-0036-1572093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Beck E, Dahl R, Szefler SJ, Bernstein J, Vandewalker M, Engel M, Moroni-Zentgraf P, Unseld A, Hamelmann E. Safety and tolerability of once-daily tiotropium Respimat® add-on to at least inhaled corticosteroid maintenance therapy in adolescent patients with moderate or severe symptomatic asthma. Pneumologie 2016. [DOI: 10.1055/s-0036-1572092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Bergkemper F, Schöler A, Engel M, Lang F, Krüger J, Schloter M, Schulz S. Phosphorus depletion in forest soils shapes bacterial communities towards phosphorus recycling systems. Environ Microbiol 2016; 18:1988-2000. [PMID: 26690731 DOI: 10.1111/1462-2920.13188] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 11/13/2015] [Accepted: 12/11/2015] [Indexed: 11/27/2022]
Abstract
Phosphorus (P) is an important macronutrient for all biota on earth but similarly a finite resource. Microorganisms play on both sides of the fence as they effectively mineralize organic and solubilize precipitated forms of soil phosphorus but conversely also take up and immobilize P. Therefore, we analysed the role of microbes in two beech forest soils with high and low P content by direct sequencing of metagenomic deoxyribonucleic acid. For inorganic P solubilization, a significantly higher microbial potential was detected in the P-rich soil. This trait especially referred to Candidatus Solibacter usiatus, likewise one of the dominating species in the data sets. A higher microbial potential for efficient phosphate uptake systems (pstSCAB) was detected in the P-depleted soil. Genes involved in P starvation response regulation (phoB, phoR) were prevalent in both soils. This underlines the importance of effective phosphate (Pho) regulon control for microorganisms to use alternative P sources during phosphate limitation. Predicted genes were primarily harboured by Rhizobiales, Actinomycetales and Acidobacteriales.
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Affiliation(s)
- Fabian Bergkemper
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Anne Schöler
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Marion Engel
- Scientific Computing Research Unit, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Friederike Lang
- Professur für Bodenökologie, Albert-Ludwigs-Universität Freiburg, Bertoldstr. 17, 79085, Freiburg i. Br, Germany
| | - Jaane Krüger
- Professur für Bodenökologie, Albert-Ludwigs-Universität Freiburg, Bertoldstr. 17, 79085, Freiburg i. Br, Germany
| | - Michael Schloter
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Stefanie Schulz
- Research Unit Environmental Genomics, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
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Dusser D, Dahl R, Casale T, Bleecker E, Pizzichini E, Engel M, Moroni-Zentgraf P, Bour L, Kerstjens H. Efficacité du tiotropium Respimat® chez les adultes atteints d’asthme modéré utilisant ou non des antileucotriènes (LTRA). Rev Mal Respir 2016. [DOI: 10.1016/j.rmr.2015.10.070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Dahl R, Casale T, Vandewalker M, Schmidt H, Engel M, Moroni-Zentgraf P, Kerstjens HAM. P150 Once-daily tiotropium Respimat® reduces risk of severe asthma exacerbation and asthma worsening in symptomatic asthma, independent of allergic and inflammatory status. Thorax 2015. [DOI: 10.1136/thoraxjnl-2015-207770.287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Halpin D, Bateman ED, Paggiaro P, Bleecker ER, Engel M, Moroni-Zentgraf P, Schmidt H, Kerstjens HAM. P148 Once-daily tiotropium Respimat® add-on to at least ICS maintenance therapy reduces exacerbation risk in patients with uncontrolled symptomatic asthma: Abstract P148 Table 1. Thorax 2015. [DOI: 10.1136/thoraxjnl-2015-207770.285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Dusser D, Buhl R, Castro M, Kerstjens HAM, Paggiaro P, Engel M, Moroni-Zentgraf P, Unseld A, Bateman ED. P149 Once-daily tiotropium Respimat® add-on to at least ICS in adult patients with symptomatic asthma: pooled safety analysis: Abstract P149 Table 1. Thorax 2015. [DOI: 10.1136/thoraxjnl-2015-207770.286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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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Casale T, Dahl R, Virchow JC, Engel M, Moroni-Zentgraf P, Lühmann R, Kerstjens HAM. P151 Tiotropium Respimat® add-on therapy reduces exacerbation risk in patients with moderate or severe symptomatic asthma, independent of TH2 status: Abstract P151 Table 1. Thorax 2015. [DOI: 10.1136/thoraxjnl-2015-207770.288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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Uksa M, Schloter M, Endesfelder D, Kublik S, Engel M, Kautz T, Köpke U, Fischer D. Prokaryotes in Subsoil-Evidence for a Strong Spatial Separation of Different Phyla by Analysing Co-occurrence Networks. Front Microbiol 2015; 6:1269. [PMID: 26635741 PMCID: PMC4649028 DOI: 10.3389/fmicb.2015.01269] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [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: 08/05/2015] [Accepted: 10/30/2015] [Indexed: 02/03/2023] Open
Abstract
Microbial communities in soil provide a wide range of ecosystem services. On the small scale, nutrient rich hotspots in soil developed from the activities of animals or plants are important drivers for the composition of microbial communities and their functional patterns. However, in subsoil, the spatial heterogeneity of microbes with differing lifestyles has been rarely considered so far. In this study, the phylogenetic composition of the bacterial and archaeal microbiome based on 16S rRNA gene pyrosequencing was investigated in the soil compartments bulk soil, drilosphere, and rhizosphere in top- and in the subsoil of an agricultural field. With co-occurrence network analysis, the spatial separation of typically oligotrophic and copiotrophic microbes was assessed. Four bacterial clusters were identified and attributed to bulk topsoil, bulk subsoil, drilosphere, and rhizosphere. The bacterial phyla Proteobacteria and Bacteroidetes, representing mostly copiotrophic bacteria, were affiliated mainly to the rhizosphere and drilosphere—both in topsoil and subsoil. Acidobacteria, Actinobacteria, Gemmatimonadetes, Planctomycetes, and Verrucomicrobia, bacterial phyla which harbor many oligotrophic bacteria, were the most abundant groups in bulk subsoil. The bacterial core microbiome in this soil was estimated to cover 7.6% of the bacterial sequencing reads including both oligotrophic and copiotrophic bacteria. In contrast the archaeal core microbiome includes 56% of the overall archaeal diversity. Thus, the spatial variability of nutrient quality and quantity strongly shapes the bacterial community composition and their interaction in subsoil, whereas archaea build a stable backbone of the soil prokaryotes due to their low variability in the different soil compartments.
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Affiliation(s)
- Marie Uksa
- Research Unit Environmental Genomics, Department of Environmental Science, Helmholtz Zentrum München Oberschleissheim, Germany
| | - Michael Schloter
- Research Unit Environmental Genomics, Department of Environmental Science, Helmholtz Zentrum München Oberschleissheim, Germany
| | - David Endesfelder
- Scientific Computing Research Unit, Institute of Computational Biology, Helmholtz Zentrum München Oberschleissheim, Germany
| | - Susanne Kublik
- Research Unit Environmental Genomics, Department of Environmental Science, Helmholtz Zentrum München Oberschleissheim, Germany
| | - Marion Engel
- Scientific Computing Research Unit, Institute of Computational Biology, Helmholtz Zentrum München Oberschleissheim, Germany
| | - Timo Kautz
- Institute of Organic Agriculture, University of Bonn Bonn, Germany
| | - Ulrich Köpke
- Institute of Organic Agriculture, University of Bonn Bonn, Germany
| | - Doreen Fischer
- Research Unit Environmental Genomics, Department of Environmental Science, Helmholtz Zentrum München Oberschleissheim, Germany
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Zwirglmaier K, Keiz K, Engel M, Geist J, Raeder U. Seasonal and spatial patterns of microbial diversity along a trophic gradient in the interconnected lakes of the Osterseen Lake District, Bavaria. Front Microbiol 2015; 6:1168. [PMID: 26579082 PMCID: PMC4623418 DOI: 10.3389/fmicb.2015.01168] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [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: 08/19/2015] [Accepted: 10/09/2015] [Indexed: 11/13/2022] Open
Abstract
The Osterseen Lake District in Bavaria consists of 19 small interconnected lakes that exhibit a pronounced trophic gradient from eutrophic to oligotrophic. It therefore presents a unique model system to address ecological questions regarding niche adaptation and Baas Becking's long standing hypothesis of "everything is everywhere, but the environment selects." Here, we present the first assessment of the microbial diversity in these lakes. We sampled the lakes in August and December and used 454 pyrosequencing of 16S rRNA amplicons to analyze the microbial diversity. The diversity patterns between lakes and seasons were compared and the bacterial community composition was correlated with key chemical and physical parameters. Distinct patterns of bacterial diversity only emerged at the level of individual OTUs (operational taxonomic units), but not at the level of the major bacterial phyla. This emphasizes the high functional and physiological diversity among bacterial species within a phylum and calls for analysis of biodiversity at the level of OTUs in order to understand fine-scale biogeography. We were able to identify a number of cosmopolitan OTUs as well as specialist OTUs that were restricted to certain lakes or seasons, suggesting adaptation to specific ecological niches.
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Affiliation(s)
- Katrin Zwirglmaier
- Aquatic Systems Biology Unit, Limnological Research Station Iffeldorf, Department of Ecology and Ecosystem Management, Technical University of Munich Munich, Germany
| | - Katharina Keiz
- Aquatic Systems Biology Unit, Limnological Research Station Iffeldorf, Department of Ecology and Ecosystem Management, Technical University of Munich Munich, Germany
| | - Marion Engel
- Helmholtz Zentrum München, Scientific Computing Research Unit, German Research Center for Environmental Health Neuherberg, Germany
| | - Juergen Geist
- Aquatic Systems Biology Unit, Limnological Research Station Iffeldorf, Department of Ecology and Ecosystem Management, Technical University of Munich Munich, Germany
| | - Uta Raeder
- Aquatic Systems Biology Unit, Limnological Research Station Iffeldorf, Department of Ecology and Ecosystem Management, Technical University of Munich Munich, Germany
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Flynn RM, Mallèn G, Engel M, Ahmed A, Rossi P. Characterizing Aquifer Heterogeneity Using Bacterial and Bacteriophage Tracers. J Environ Qual 2015; 44:1448-1458. [PMID: 26436262 DOI: 10.2134/jeq2015.02.0117] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Gravel aquifers act as important potable water sources in central western Europe, yet they are subject to numerous contamination pressures. Compositional and textural heterogeneity makes protection zone delineation around groundwater supplies in these units challenging; artificial tracer testing aids characterization. This paper reappraises previous tracer test results in light of new geological and microbiological data. Comparative passive gradient testing, using a fluorescent solute (Uranine), virus (H40/1 bacteriophage), and comparably sized bacterial tracers and , was used to investigate a calcareous gravel aquifer's ability to remove microbiological contaminants at a test site near Munich, Germany. Test results revealed relative recoveries could exceed those of H40/1 at monitoring wells, 10 m and 20 m from an injection well, by almost four times; recoveries varied by a factor of up to three between wells. Application of filtration theory suggested greater attenuation of H40/1 relative to similarly charged occurred due to differences in microorganism size, while estimated collision efficiencies appeared comparable. By contrast, more positively charged experienced greater attenuation at one monitoring point, while lower attenuation rates at the second location indicated the influence of geochemical heterogeneity. Test findings proved consistent with observations from nearby fresh outcrops that suggested thin open framework gravel beds dominated mass transport in the aquifer, while discrete intervals containing stained clasts reflect localized geochemical heterogeneity. Study results highlight the utility of reconciling outcrop observations with artificial tracer test responses, using microbiological tracers with well-defined properties, to characterize aquifer heterogeneity.
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Stempfhuber B, Engel M, Fischer D, Neskovic-Prit G, Wubet T, Schöning I, Gubry-Rangin C, Kublik S, Schloter-Hai B, Rattei T, Welzl G, Nicol GW, Schrumpf M, Buscot F, Prosser JI, Schloter M. pH as a Driver for Ammonia-Oxidizing Archaea in Forest Soils. Microb Ecol 2015; 69:879-883. [PMID: 25501889 DOI: 10.1007/s00248-014-0548-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 11/27/2014] [Indexed: 06/04/2023]
Abstract
In this study, we investigated the impact of soil pH on the diversity and abundance of archaeal ammonia oxidizers in 27 different forest soils across Germany. DNA was extracted from topsoil samples, the amoA gene, encoding ammonia monooxygenase, was amplified; and the amplicons were sequenced using a 454-based pyrosequencing approach. As expected, the ratio of archaeal (AOA) to bacterial (AOB) ammonia oxidizers' amoA genes increased sharply with decreasing soil pH. The diversity of AOA differed significantly between sites with ultra-acidic soil pH (<3.5) and sites with higher pH values. The major OTUs from soil samples with low pH could be detected at each site with a soil pH <3.5 but not at sites with pH >4.5, regardless of geographic position and vegetation. These OTUs could be related to the Nitrosotalea group 1.1 and the Nitrososphaera subcluster 7.2, respectively, and showed significant similarities to OTUs described from other acidic environments. Conversely, none of the major OTUs typical of sites with a soil pH >4.6 could be found in the ultra- and extreme acidic soils. Based on a comparison with the amoA gene sequence data from a previous study performed on agricultural soils, we could clearly show that the development of AOA communities in soils with ultra-acidic pH (<3.5) is mainly triggered by soil pH and is not influenced significantly by the type of land use, the soil type, or the geographic position of the site, which was observed for sites with acido-neutral soil pH.
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Affiliation(s)
- Barbara Stempfhuber
- Environmental Genomics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Ingolstädter Landstraße 1, 85764, Neuherberg, Germany
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