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Matthews EA, Sun W, McMahon SM, Doengi M, Halka L, Anders S, Müller JA, Steinlein P, Vana NS, van Dyk G, Pitsch J, Becker AJ, Pfeifer A, Kavalali ET, Lamprecht A, Henneberger C, Stein V, Schoch S, Dietrich D. Optical analysis of glutamate spread in the neuropil. Cereb Cortex 2022; 32:3669-3689. [PMID: 35059716 PMCID: PMC9433421 DOI: 10.1093/cercor/bhab440] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 11/03/2021] [Accepted: 11/09/2021] [Indexed: 11/16/2022] Open
Abstract
Fast synaptic communication uses diffusible transmitters whose spread is limited by uptake mechanisms. However, on the submicron-scale, the distance between two synapses, the extent of glutamate spread has so far remained difficult to measure. Here, we show that quantal glutamate release from individual hippocampal synapses activates extracellular iGluSnFr molecules at a distance of >1.5 μm. 2P-glutamate uncaging near spines further showed that alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)-Rs and N-methyl-D-aspartate (NMDA)-Rs respond to distant uncaging spots at approximately 800 and 2000 nm, respectively, when releasing the amount of glutamate contained in approximately five synaptic vesicles. The uncaging-induced remote activation of AMPA-Rs was facilitated by blocking glutamate transporters but only modestly decreased by elevating the recording temperature. When mimicking release from neighboring synapses by three simultaneous uncaging spots in the microenvironment of a spine, AMPA-R-mediated responses increased supra-additively. Interfering with extracellular glutamate diffusion through a glutamate scavenger system weakly reduced field synaptic responses but not the quantal amplitude. Together, our data suggest that the neuropil is more permissive to short-range spread of transmitter than suggested by theory, that multivesicular release could regularly coactivate nearest neighbor synapses and that on this scale glutamate buffering by transporters primarily limits the spread of transmitter and allows for cooperative glutamate signaling in extracellular microdomains.
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Affiliation(s)
| | | | | | - M Doengi
- Institute of Physiology, Medical Faculty, University of Bonn, 53115 Bonn, Germany
| | - L Halka
- Institute of Physiology, Medical Faculty, University of Bonn, 53115 Bonn, Germany
| | - S Anders
- Institute of Cellular Neurosciences, Medical Faculty, University of Bonn, 53127 Bonn, Germany
| | - J A Müller
- Section for Translational Epilepsy Research, Department of Neuropathology, University Hospital Bonn, 53127 Bonn, Germany
| | - P Steinlein
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany,Department of Pharmaceutics, Institute of Pharmacy, University of Bonn, Bonn, Germany
| | - N S Vana
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany
| | - G van Dyk
- Department of Neurosurgery, University Hospital Bonn, 53127 Bonn, Germany
| | - J Pitsch
- Section for Translational Epilepsy Research, Department of Neuropathology, University Hospital Bonn, 53127 Bonn, Germany,Department of Epileptology, University Hospital Bonn, 53127 Bonn, Germany
| | - A J Becker
- Section for Translational Epilepsy Research, Department of Neuropathology, University Hospital Bonn, 53127 Bonn, Germany,Department of Epileptology, University Hospital Bonn, 53127 Bonn, Germany
| | - A Pfeifer
- Institute of Pharmacology and Toxicology, University Hospital, University of Bonn, 53127 Bonn, Germany
| | - E T Kavalali
- Department of Pharmacology, The Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN 37240-7933, USA
| | - A Lamprecht
- Department of Pharmaceutics, Institute of Pharmacy, University of Bonn, Bonn, Germany
| | - C Henneberger
- Institute of Cellular Neurosciences, Medical Faculty, University of Bonn, 53127 Bonn, Germany,German Center for Neurodegenerative Diseases (DZNE), 53127 Bonn, Germany,Institute of Neurology, University College London, London, WC1N 3BG, UK
| | - V Stein
- Institute of Physiology, Medical Faculty, University of Bonn, 53115 Bonn, Germany
| | - S Schoch
- Address correspondence to Prof. Dr Dirk Dietrich, Department of Neurosurgery, University Hospital Bonn, Venusberg Campus 1, Bonn 53127, Germany. ; and Prof. Dr Susanne Schoch, Institute of Neuropathology, University Hospital Bonn, Venusberg Campus 1, Bonn 53127, Germany.
| | - D Dietrich
- Address correspondence to Prof. Dr Dirk Dietrich, Department of Neurosurgery, University Hospital Bonn, Venusberg Campus 1, Bonn 53127, Germany. ; and Prof. Dr Susanne Schoch, Institute of Neuropathology, University Hospital Bonn, Venusberg Campus 1, Bonn 53127, Germany.
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2
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Scheller M, Ludwig AK, Göllner S, Rohde C, Krämer S, Stäble S, Janssen M, Müller JA, He L, Bäumer N, Arnold C, Gerß J, Schönung M, Thiede C, Niederwieser C, Niederwieser D, Serve H, Berdel WE, Thiem U, Hemmerling I, Leuschner F, Plass C, Schlesner M, Zaugg J, Milsom MD, Trumpp A, Pabst C, Lipka DB, Müller-Tidow C. Hotspot DNMT3A mutations in clonal hematopoiesis and acute myeloid leukemia sensitize cells to azacytidine via viral mimicry response. Nat Cancer 2021; 2:527-544. [PMID: 35122024 DOI: 10.1038/s43018-021-00213-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 04/19/2021] [Indexed: 02/04/2023]
Abstract
Somatic mutations in DNA methyltransferase 3A (DNMT3A) are among the most frequent alterations in clonal hematopoiesis (CH) and acute myeloid leukemia (AML), with a hotspot in exon 23 at arginine 882 (DNMT3AR882). Here, we demonstrate that DNMT3AR882H-dependent CH and AML cells are specifically susceptible to the hypomethylating agent azacytidine (AZA). Addition of AZA to chemotherapy prolonged AML survival solely in individuals with DNMT3AR882 mutations, suggesting its potential as a predictive marker for AZA response. AML and CH mouse models confirmed AZA susceptibility specifically in DNMT3AR882H-expressing cells. Hematopoietic stem cells (HSCs) and progenitor cells expressing DNMT3AR882H exhibited cell autonomous viral mimicry response as a result of focal DNA hypomethylation at retrotransposon sequences. Administration of AZA boosted hypomethylation of retrotransposons specifically in DNMT3AR882H-expressing cells and maintained elevated levels of canonical interferon-stimulated genes (ISGs), thus leading to suppressed protein translation and increased apoptosis.
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Affiliation(s)
- Marina Scheller
- Department of Medicine, Hematology, Oncology and Rheumatology, University Hospital Heidelberg, Heidelberg, Germany. .,Molecular Medicine Partnership Unit, European Molecular Biology Laboratory (EMBL), University of Heidelberg, Heidelberg, Germany.
| | - Anne Kathrin Ludwig
- Department of Medicine, Hematology, Oncology and Rheumatology, University Hospital Heidelberg, Heidelberg, Germany.,Molecular Medicine Partnership Unit, European Molecular Biology Laboratory (EMBL), University of Heidelberg, Heidelberg, Germany
| | - Stefanie Göllner
- Department of Medicine, Hematology, Oncology and Rheumatology, University Hospital Heidelberg, Heidelberg, Germany
| | - Christian Rohde
- Department of Medicine, Hematology, Oncology and Rheumatology, University Hospital Heidelberg, Heidelberg, Germany.,Molecular Medicine Partnership Unit, European Molecular Biology Laboratory (EMBL), University of Heidelberg, Heidelberg, Germany
| | - Stephen Krämer
- Bioinformatics and Omics Data Analytics Group, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Section Translational Cancer Epigenomics, Division of Translational Medical Oncology, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Faculty of Biosciences, Heidelberg University, Heidelberg, Germany.,National Center for Tumor Diseases (NCT), Heidelberg, Germany.,Biomedical Informatics, Data Mining and Data Analytics, Faculty of Applied Computer Science and Medical Faculty, University of Augsburg, Augsburg, Germany
| | - Sina Stäble
- Section Translational Cancer Epigenomics, Division of Translational Medical Oncology, German Cancer Research Center (DKFZ), Heidelberg, Germany.,National Center for Tumor Diseases (NCT), Heidelberg, Germany
| | - Maike Janssen
- Department of Medicine, Hematology, Oncology and Rheumatology, University Hospital Heidelberg, Heidelberg, Germany.,Molecular Medicine Partnership Unit, European Molecular Biology Laboratory (EMBL), University of Heidelberg, Heidelberg, Germany
| | - James-Arne Müller
- Department of Medicine, Hematology, Oncology and Rheumatology, University Hospital Heidelberg, Heidelberg, Germany
| | - Lixiazi He
- Department of Medicine, Hematology, Oncology and Rheumatology, University Hospital Heidelberg, Heidelberg, Germany
| | - Nicole Bäumer
- Department of Medicine A, University Hospital Münster, Münster, Germany
| | - Christian Arnold
- European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
| | - Joachim Gerß
- Institute of Biostatistics and Clinical Research, WWU Münster, Münster, Germany
| | - Maximilian Schönung
- Section Translational Cancer Epigenomics, Division of Translational Medical Oncology, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Faculty of Biosciences, Heidelberg University, Heidelberg, Germany.,National Center for Tumor Diseases (NCT), Heidelberg, Germany
| | - Christian Thiede
- Department of Medicine, University Hospital Dresden, Dresden, Germany
| | - Christian Niederwieser
- Interdisziplinäre Klinik und Poliklinik für Stammzelltransplantation, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | | | - Hubert Serve
- Department of Medicine II, University of Frankfurt, Frankfurt, Germany
| | - Wolfgang E Berdel
- Department of Medicine A, University Hospital Münster, Münster, Germany
| | - Ulrich Thiem
- Geriatrics and Gerontology, University of Hamburg, Hamburg, Germany
| | - Inga Hemmerling
- Department of Medicine, Cardiology, University Hospital of Heidelberg, Heidelberg, Germany
| | - Florian Leuschner
- Department of Medicine, Cardiology, University Hospital of Heidelberg, Heidelberg, Germany
| | - Christoph Plass
- Division of Cancer Epigenomics, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Matthias Schlesner
- Bioinformatics and Omics Data Analytics Group, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Biomedical Informatics, Data Mining and Data Analytics, Faculty of Applied Computer Science and Medical Faculty, University of Augsburg, Augsburg, Germany
| | - Judith Zaugg
- Molecular Medicine Partnership Unit, European Molecular Biology Laboratory (EMBL), University of Heidelberg, Heidelberg, Germany.,European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
| | - Michael D Milsom
- Division of Experimental Hematology, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), Heidelberg, Germany
| | - Andreas Trumpp
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), Heidelberg, Germany.,Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, Heidelberg, Germany
| | - Caroline Pabst
- Department of Medicine, Hematology, Oncology and Rheumatology, University Hospital Heidelberg, Heidelberg, Germany.,Molecular Medicine Partnership Unit, European Molecular Biology Laboratory (EMBL), University of Heidelberg, Heidelberg, Germany
| | - Daniel B Lipka
- Section Translational Cancer Epigenomics, Division of Translational Medical Oncology, German Cancer Research Center (DKFZ), Heidelberg, Germany.,National Center for Tumor Diseases (NCT), Heidelberg, Germany
| | - Carsten Müller-Tidow
- Department of Medicine, Hematology, Oncology and Rheumatology, University Hospital Heidelberg, Heidelberg, Germany. .,Molecular Medicine Partnership Unit, European Molecular Biology Laboratory (EMBL), University of Heidelberg, Heidelberg, Germany. .,National Center for Tumor Diseases (NCT), Heidelberg, Germany.
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3
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Debski KJ, Ceglia N, Ghestem A, Ivanov AI, Brancati GE, Bröer S, Bot AM, Müller JA, Schoch S, Becker A, Löscher W, Guye M, Sassone-Corsi P, Lukasiuk K, Baldi P, Bernard C. The circadian dynamics of the hippocampal transcriptome and proteome is altered in experimental temporal lobe epilepsy. Sci Adv 2020; 6:eaat5979. [PMID: 33036982 PMCID: PMC10764101 DOI: 10.1126/sciadv.aat5979] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 08/27/2020] [Indexed: 06/11/2023]
Abstract
Gene and protein expressions display circadian oscillations, which can be disrupted in diseases in most body organs. Whether these oscillations occur in the healthy hippocampus and whether they are altered in epilepsy are not known. We identified more than 1200 daily oscillating transcripts in the hippocampus of control mice and 1600 in experimental epilepsy, with only one-fourth oscillating in both conditions. Comparison of gene oscillations in control and epilepsy predicted time-dependent alterations in energy metabolism, which were verified experimentally. Although aerobic glycolysis remained constant from morning to afternoon in controls, it increased in epilepsy. In contrast, oxidative phosphorylation increased in control and decreased in epilepsy. Thus, the control hippocampus shows circadian molecular remapping, which is altered in epilepsy. We suggest that the hippocampus operates in a different functioning mode in epilepsy. These alterations need to be considered when studying epilepsy mechanisms, designing drug treatments, and timing their delivery.
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Affiliation(s)
- K J Debski
- Epileptogenesis Laboratory, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland
- Bioinformatics Laboratory, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland
| | - N Ceglia
- Department of Computer Science and Institute for Genomics and Bioinformatics, University of California, Irvine, Irvine, CA 92697-3435, USA
| | - A Ghestem
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France
| | - A I Ivanov
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France
| | - G E Brancati
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France
| | - S Bröer
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover, Hannover, Germany
| | - A M Bot
- Epileptogenesis Laboratory, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland
| | - J A Müller
- Department of Neuropathology, University of Bonn Medical Center, Bonn, Germany
| | - S Schoch
- Department of Neuropathology, University of Bonn Medical Center, Bonn, Germany
| | - A Becker
- Department of Neuropathology, University of Bonn Medical Center, Bonn, Germany
| | - W Löscher
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover, Hannover, Germany
| | - M Guye
- Aix-Marseille Univ, CNRS, CRMBM, Marseille, France
- APHM, Hôpital Universitaire Timone, CEMEREM, Marseille, France
| | - P Sassone-Corsi
- Department of Biological Chemistry, University of California-Irvine, Irvine, CA 92697, USA
| | - K Lukasiuk
- Epileptogenesis Laboratory, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland
| | - P Baldi
- Department of Computer Science and Institute for Genomics and Bioinformatics, University of California, Irvine, Irvine, CA 92697-3435, USA
| | - C Bernard
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France.
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4
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Bogert NV, Furkel J, Din S, Braren I, Eckstein V, Müller JA, Uhlmann L, Katus HA, Konstandin MH. A novel approach to genetic engineering of T-cell subsets by hematopoietic stem cell infection with a bicistronic lentivirus. Sci Rep 2020; 10:13740. [PMID: 32792615 PMCID: PMC7426960 DOI: 10.1038/s41598-020-70793-6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 08/04/2020] [Indexed: 11/23/2022] Open
Abstract
Lentiviral modification of hematopoietic stem cells (HSCs) paved the way for in vivo experimentation and therapeutic approaches in patients with genetic disease. A disadvantage of this method is the use of a ubiquitous promoter leads not only to genetic modification of the leukocyte subset of interest e.g. T-cells, but also all other subsequent leukocyte progeny of the parent HSCs. To overcome this limitation we tested a bicistronic lentivirus, enabling subset specific modifications. Designed novel lentiviral constructs harbor a global promoter (mPGK) regulating mCherry for HSCs selection and a T-cell specific promoter upstream of eGFP. Two T-cell specific promoters were assessed: the distal Lck—(dLck) and the CD3δ-promoter. Transduced HSCs were FACS sorted by mCherry expression and transferred into sublethally irradiated C57/BL6 mice. Successful transplantation and T-cell specific expression of eGFP was monitored by peripheral blood assessment. Furthermore, recruitment response of lentiviral engineered leukocytes to the site of inflammation was tested in a peritonitis model without functional impairment. Our constructed lentivirus enables fast generation of subset specific leukocyte transgenesis as shown in T-cells in vivo and opens new opportunities to modify other HSCs derived subsets in the future.
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Affiliation(s)
- N V Bogert
- Department of Cardiology, University Hospital Heidelberg, Ruprecht-Karls-University, Heidelberg, Germany. .,DZHK (German Centre for Cardiovascular Research) Partner Site, Heidelberg/Mannheim, Germany.
| | - J Furkel
- Department of Cardiology, University Hospital Heidelberg, Ruprecht-Karls-University, Heidelberg, Germany.,DZHK (German Centre for Cardiovascular Research) Partner Site, Heidelberg/Mannheim, Germany
| | - S Din
- Department of Cardiology, University Hospital Heidelberg, Ruprecht-Karls-University, Heidelberg, Germany.,DZHK (German Centre for Cardiovascular Research) Partner Site, Heidelberg/Mannheim, Germany
| | - I Braren
- Vector Core Facility, University Hospital Hamburg-Eppendorf, University Hamburg, Hamburg, Germany.,DZHK (German Centre for Cardiovascular Research) Partner Site, Hamburg, Germany
| | - V Eckstein
- Department of Hematology, University Hospital Heidelberg, Ruprecht-Karls-University, Heidelberg, Germany
| | - J A Müller
- Department of Hematology, University Hospital Heidelberg, Ruprecht-Karls-University, Heidelberg, Germany
| | - L Uhlmann
- Institute of Medical Biometry and Informatics, University Hospital Heidelberg, Ruprecht-Karls-University, Heidelberg, Germany
| | - H A Katus
- Department of Cardiology, University Hospital Heidelberg, Ruprecht-Karls-University, Heidelberg, Germany.,DZHK (German Centre for Cardiovascular Research) Partner Site, Heidelberg/Mannheim, Germany
| | - M H Konstandin
- Department of Cardiology, University Hospital Heidelberg, Ruprecht-Karls-University, Heidelberg, Germany.,DZHK (German Centre for Cardiovascular Research) Partner Site, Heidelberg/Mannheim, Germany
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5
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Rohr N, Müller JA, Fischer J. Influence of Ambient Temperature and Light-curing Moment on Polymerization Shrinkage and Strength of Resin Composite Cements. Oper Dent 2018; 43:619-630. [DOI: 10.2341/17-085-l] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
ABSTRACT
Objective:
The purpose of this study was to establish a clinically appropriate light-curing moment for resin composite cements while achieving the highest indirect tensile strength and lowest polymerization shrinkage.
Methods and Materials:
Polymerization shrinkage of seven resin composite cements (Multilink Automix, Multilink Speed Cem, RelyX Ultimate, RelyX Unicem 2 Automix, Panavia V5, Panavia SA plus, VITA Adiva F-Cem) was measured at ambient temperatures of 23°C and 37°C. Testing was done for autopolymerized and light-cured specimens after light application at either 1, 5, or 10 minutes after mixing. Indirect tensile strength of all cements was measured after 24 hours of storage at temperatures of 23°C and 37°C, for autopolymerized and light-cured specimens after light application 1, 5, or 10 minutes after mixing. To illustrate filler size and microstructures, SEM images of all cements were captured. Statistical analysis was performed with one-way ANOVA followed by post hoc Fisher LSD test (α=0.05).
Results:
Final polymerization shrinkage of the resin composite cements ranged from 3.2% to 7.0%. An increase in temperature from 23°C to 37°C as well as the light-curing moment resulted in material dependent effects on the polymerization shrinkage and indirect tensile strength of the cements. Polymerization shrinkage of the cements did not correlate with the indirect tensile strength of the cement in the respective groups. Highest indirect tensile strengths were observed for the materials containing a homogeneous distribution of fillers with a size of about 1 μm (Multilink Automix, Panavia V5, VITA Adiva F-Cem).
Conclusion:
The magnitude of the effect of light-curing moment and temperature increase on polymerization shrinkage and indirect tensile strength of resin composite cements is material dependent and cannot be generalized.
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Affiliation(s)
- N Rohr
- Nadja Rohr, Dr med dent, University Center for Dental Medicine Basel, Division of Dental Materials and Engineering, Department of Reconstructive Dentistry, Basel, Switzerland
| | - JA Müller
- Johannes A Müller, Dr med dent, University Center for Dental Medicine, Department of Reconstructive Dentistry, Basel, Switzerland
| | - J Fischer
- Jens Fischer, Prof Dr med dent, Dr rer nat, University Center for Dental Medicine, Division of Dental Materials and Engineering, Department of Reconstructive Dentistry, Basel, Switzerland
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Müller JA, Zirafi O, Roan NR, Lee SJ, Münch J. Evaluation of EPI-X4 as a urinary peptide biomarker for diagnosis and prognosis of late acute GvHD. Bone Marrow Transplant 2016; 51:1137-9. [PMID: 27042833 DOI: 10.1038/bmt.2016.65] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- J A Müller
- Institute of Molecular Virology, Ulm University Medical Centre, Ulm, Germany
| | - O Zirafi
- Institute of Molecular Virology, Ulm University Medical Centre, Ulm, Germany
| | - N R Roan
- Department of Urology, University of California, San Francisco, CA, USA.,Gladstone Institute of Virology and Immunology, The J. David Gladstone Institutes, San Francisco, CA, USA
| | - S J Lee
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - J Münch
- Institute of Molecular Virology, Ulm University Medical Centre, Ulm, Germany.,Ulm Peptide Pharmaceuticals, University of Ulm, Ulm, Germany
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Strünkmann GW, Müller JA, Albert F, Schwedes J. Reduction of excess sludge production using mechanical disintegration devices. Water Sci Technol 2006; 54:69-76. [PMID: 17087371 DOI: 10.2166/wst.2006.548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The usability of mechanical disintegration techniques for the reduction of excess sludge production in the activated sludge process was investigated. Using three different disintegration devices (ultrasonic homogeniser, stirred media mill, high pressure homogeniser) and different operational parameters of the disintegration, the effect of mechanical disintegration on the excess sludge production and on the effluent quality was studied within a continuously operated, laboratory scale wastewater treatment system with pre-denitrification. Depending on the operational conditions and the disintegration device used, a reduction of excess sludge production of up to 70% was achieved. A combination of mechanical disintegration with a membrane bioreactor process with high sludge age is more energy effective concerning reduction of sludge production than with a conventional activated sludge process at lower sludge ages. Depending on the disintegration parameters, the disintegration has no, or only minor, negative effect on the soluble effluent COD and on the COD-removal capacity of the activated sludge process. Nitrogen-removal was slightly deteriorated by the disintegration, whereas the system used was not optimised for nitrogen removal before disintegration was implemented.
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Affiliation(s)
- G W Strünkmann
- Institute of Mechanical Process Engineering, Post Box 3329, Technical University of Braunschweig, D-38023 Braunschweig, Germany.
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8
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Nyikos S, von Rechenberg B, Werner D, Müller JA, Buess C, Keel R, Kalpen A, Vontobel HD, von Plocki KA, Auer JA. Measurements of saddle pressure in conjunction with back problems in horses. PFERDEHEILKUNDE 2005. [DOI: 10.21836/pem20050301] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Mönkemöller S, Keel R, Hambsch D, Müller JA, Kalpen A, Geuder M, Auer JA, von Rechenberg B. Pliance Mobile–16HE: A study about pressure measurements under the saddle after the adjustment of the saddle fit. PFERDEHEILKUNDE 2005. [DOI: 10.21836/pem20050201] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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10
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Dziurla MA, Leroy P, Strünkmann GW, Salhi M, Lee DU, Camacho P, Heinz V, Müller JA, Paul E, Ginestet P, Audic JM, Block JC. Measurement of glutathione in activated sludges. Water Res 2004; 38:236-244. [PMID: 14630122 DOI: 10.1016/j.watres.2003.08.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Thermal, electric, mechanical or oxidative stress seem a promising way to reduce the production of excess activated sludge during biological wastewater treatment. However, the adaptation and the resistance of the sludge microbial ecosystem to stress conditions is a major question as it may definitively limit the effect of some treatments. Defence mechanisms developed by aerobic organisms, in particular, in response to oxidative stress involve various antioxidant activities and compounds such as glutathione. An HPLC method was developed for measuring reduced and total glutathione (GSH and GSHt) in perchloric acid sludge extracts. The method was sensitive, highly specific and validated for linearity, precision and recovery. Considering the extraction yield and the oxidation of GSH during extract storage, the measured GSH concentration was estimated to represent 60% of the GSH content from activated sludges. GSHt ranged from 0.32 to 3.34micromolg(-1) volatile solids and the GSH/GSHt ratio ranged from 32% to 91%. Measurements performed on sludges stressed in precise conditions selected to reach a reduction of sludge production showed a decrease of GSH and GSHt concentrations with thermal, mechanical, electric and ozone stress.
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Affiliation(s)
- M A Dziurla
- Laboratoire de Chimie, Physique et Microbiologie pour l'Environnement-LCPME, Unité Mixte de Recherche-UMR 7564, CNRS-Université Henri Poincaré, Nancy 1, Faculté de Pharmacie-Pôle de l'eau, 15, avenue du Charmois, 54500 Vandoeurve-les-Nancy, France
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11
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Müller JA, Winter A, Strünkmann G. Investigation and assessment of sludge pre-treatment processes. Water Sci Technol 2004; 49:97-104. [PMID: 15259943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The pre-treatment of sludges by disintegration will result in a number of changes in sludge properties. Floc destruction as well as cell disintegration will occur. This leads to an increase of soluble substances and fine particles. Furthermore, biochemical reactions may appear during or immediately after disintegration. The influence of disintegration of excess sludge on anaerobic digestion was studied in full scale. A stirred ball mill, an ultrasound disintegrator, a lysate centrifuge and ozone treatment were used. The results of the degradation process were compared to a reference system without pre-treatment. An enhancement of the degree of degradation of 7.4% to 20% was observed. The pollution of sludge water as well as the dewatering properties of the digested sludge were investigated. COD and ammonia in the sludge water were increased and a higher polymer demand was observed while the solid content after dewatering stayed almost unchanged. Based on these results the cost effectiveness has been assessed taking into account different conditions (size of WWTP, cost for disposal, etc.). Capital and energy costs are the main factors while the decrease in disposal costs due to the reduced amount of sludge is the main profit factor.
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Affiliation(s)
- J A Müller
- Institute of Sanitary and Environmental Engineering Technical University of Braunschweig, Braunschweig, Germany.
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Palmowski LM, Müller JA. Anaerobic degradation of organic materials--significance of the substrate surface area. Water Sci Technol 2003; 47:231-238. [PMID: 12926693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In anaerobic degradation of substrates containing mainly particulate organic matter, solids hydrolysis is rate-limiting. In these investigations, the particle size of various substrates was reduced by comminution to support hydrolysis. Two positive effects of comminution were observed. For substrates with high fibre content, which are particularly resistant to biodegradation, a significant improvement of the degradation degree was observed as a result of comminution. Secondly, for all substrates tested, and particularly for those rich in fibres, the degradation rate of comminuted samples was significantly higher. The first reason for both effects is an increase of the sample surface area. Several methods for measuring the specific surface area of organic materials, including particle size analysis, Nitrogen-adsorption and enzyme adsorption, were used and compared for the purpose of this study, where the surface area accessible to microbial enzymes is critical. The significance of the surface area in anaerobic degradation of particulate substrates was investigated through a kinetic model where the hydrolysis rate was based on the sample surface area. Good agreements were obtained between model and experiments carried out with samples of various specific surface areas. These results reinforced the significance of the sample area in anaerobic degradation processes. However, other effects of comminution responsible for the increased degradation degree and degradation rate were identified and discussed. These include: the increase of dissolved compounds due to cell rupture, exposition of surface areas previously inacessible for microbial degradation, and alteration of the sample structure such as the lignin-cellulose arrangements.
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Affiliation(s)
- L M Palmowski
- School of Engineering and Technology, Deakin University, Australia.
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Müller JA, Galushko AS, Kappler A, Schink B. Initiation of anaerobic degradation of p-cresol by formation of 4-hydroxybenzylsuccinate in desulfobacterium cetonicum. J Bacteriol 2001; 183:752-7. [PMID: 11133971 PMCID: PMC94933 DOI: 10.1128/jb.183.2.752-757.2001] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The anaerobic bacterium Desulfobacterium cetonicum oxidized p-cresol completely to CO(2) with sulfate as the electron acceptor. During growth, 4-hydroxybenzylsuccinate accumulated in the medium. This finding indicated that the methyl group of p-cresol is activated by addition to fumarate, analogous to anaerobic toluene, m-xylene, and m-cresol degradation. In cell extracts, the formation of 4-hydroxybenzylsuccinate from p-cresol and fumarate was detected at an initial rate of 0.57 nmol min(-1) (mg of protein)(-1). This activity was specific for extracts of p-cresol-grown cells. 4-Hydroxybenzylsuccinate was degraded further to 4-hydroxybenzoyl-coenzyme A (CoA), most likely via beta-oxidation. 4-Hydroxybenzoyl-CoA was reductively dehydroxylated to benzoyl-CoA. There was no evidence of degradation of p-cresol via methyl group oxidation by p-cresol-methylhydroxylase in this bacterium.
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Affiliation(s)
- J A Müller
- Fakultät für Biologie, Universität Konstanz, 78457 Konstanz, Germany.
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Müller JA. Prospects and problems of sludge pre-treatment processes. Water Sci Technol 2001; 44:121-128. [PMID: 11794642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Pre-treatment processes have been developed in order to improve subsequent sludge treatment and disposal. Disintegration of sludge solids in the aqueous phase changes the sludge structure and solubilizes organic matter. This paper provides an overview of the applications of wet disintegration in wastewater and sludge treatment. Applied disintegration techniques such as mechanical, thermal, chemical and biological methods are briefly described. The methods are compared regarding energy consumption, operational reliability and stage of development for application on wastewater treatment plants. Mechanical and thermal methods appear to be most suitable at this stage. The effects of pre-treatment on subsequent sludge treatment processes and the wastewater treatment are described. The performance of various methods is assessed. For the improvement of stabilization, mechanical and ozone treatment as well as thermal treatment perform best. Dewatering can be enhanced by thermal and freeze/thaw treatment. All methods show positive effects in the reduction of the number of pathogens. Pre-treatment leads to secondary effects like the generation of recalcitrant compounds and odor, which is mainly a problem of thermal and ozone treatment. The evaluation of capital and operational costs is difficult, because of the lack of full-scale experience. Especially thermal, freeze/thaw and biological treatments can be realized at low costs if the conditions are appropriate. Nevertheless, the economic efficiency has to be investigated critically for each individual application.
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Affiliation(s)
- J A Müller
- Institute of Sanitary Engineering and Institute of Mechanical Process Engineering, Technical University of Braunschweig, Germany.
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Abstract
The anaerobic bacterium Sporotomaculum hydroxybenzoicum ferments 3-hydroxybenzoate to acetate, butyrate, and CO2. 3-Hydroxybenzoate was activated to 3-hydroxybenzoyl-CoA in a CoA-transferase reaction with acetyl-CoA or butyryl-CoA as CoA donors. 3-Hydroxybenzoyl-CoA was reductively dehydroxylated, forming benzoyl-CoA. This reaction was measured in cell-free extracts with cob(I)alamin as low-potential electron donor. No evidence was obtained that cob(I)alamin is the physiological electron donor; however, inhibitor studies indicated involvement of a strong nucleophile in the reaction. Benzoate was degraded by dense cell suspensions without a lag phase until an in situ deltaG' value <-25 kJ mol(-1) was reached. Benzoyl-CoA reductase was not detected. Enzyme activities for all reaction steps from glutaryl-CoA to butyryl-CoA, and ATP formation via acetate kinase were detected in cell-free extracts. Glutaconyl-CoA decarboxylase is likely to act as a primary sodium ion pump.
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Affiliation(s)
- J A Müller
- Fakultät für Biologie, Universität Konstanz, Germany.
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Palmowski LM, Müller JA. Influence of the size reduction of organic waste on their anaerobic digestion. Water Sci Technol 2000; 41:155-162. [PMID: 11381986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The rate-limiting step in anaerobic digestion of organic solid waste is generally their hydrolysis. A size reduction of the particles and the resulting enlargement of the available specific surface can support the biological process in two ways. Firstly, in case of substrates with a high content of fibres and a low xegradability, their comminution yields to an improved digester gas production. This leads to a decreased amount of residues to be disposed of and to an increased quantity of useful digester gas. The second effect of the particle size reduction observed with all the substrates but particularly with those of low degradability is a reduction of the technical digestion time. Furthermore, the particle size of organic waste has an influence on the dewaterability after codigestion with sewage sludge. The presence of organic waste residues improves the dewaterability measured as specific resistance to filtration but this positive effect is attenuated if the particle size of the solids is reduced.
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Affiliation(s)
- L M Palmowski
- Institute of Mechanical Process Engineering, Technical University of Braunschweig, Postbox 3329, D-38023 Braunschweig, Germany. ; ; http://www.tu-bs.del/~jom
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Müller JA, Galushko AS, Kappler A, Schink B. Anaerobic degradation of m-cresol by Desulfobacterium cetonicum is initiated by formation of 3-hydroxybenzylsuccinate. Arch Microbiol 1999; 172:287-94. [PMID: 10550470 DOI: 10.1007/s002030050782] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The anaerobic bacterium Desulfobacterium cetonicum oxidized m-cresol completely with sulfate as electron acceptor. During growth, 3-hydroxybenzylsuccinate (identified by gas chromatography/mass spectroscopy and by comparison of high-performance liquid chromatography retention time and UV spectrum with a chemically synthesized reference compound) accumulated in the medium. This finding indicates that the methyl group of m-cresol is activated by addition to fumarate as in the case of anaerobic toluene metabolism. In cell-free extracts of D. cetonicum, the formation of 3-hydroxybenzylsuccinate from m-cresol and fumarate was detected at an activity of 0.5 nmol min(-1) (mg protein)(-1). This reaction depended strictly on anoxic assay conditions. Treatment with air resulted in a complete loss of activity; however, some activity could be recovered after restoring anoxic conditions. The activity was slightly membrane-associated. 3-Hydroxybenzylsuccinate was degraded via CoA thioesterification and further oxidation to 3-hydroxybenzoyl-CoA as subsequent steps in the degradation pathway.
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Affiliation(s)
- J A Müller
- Fakultät für Biologie, Universität Konstanz, Fach M654, D-78457 Konstanz, Germany.
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Mellies JK, Bäumer T, Müller JA, Tournier-Lasserve E, Chabriat H, Knobloch O, Hackelöer HJ, Goebel HH, Wetzig L, Haller P. SPECT study of a German CADASIL family: a phenotype with migraine and progressive dementia only. Neurology 1998; 50:1715-21. [PMID: 9633716 DOI: 10.1212/wnl.50.6.1715] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE We describe the clinical, molecular, genetic, MRI, and SPECT features of a German family with autosomal dominant migraine and dementia, mapping to the cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) locus. We studied the correlation of cerebral blood flow, MRI, and cognitive function. BACKGROUND CADASIL is a small-vessel disease of the brain mapped to chromosome 19p13.1. Mutations of the Notch3 gene cause this disorder. Most phenotypes are characterized by transient ischemic attacks (TIAs) and lacunar strokes leading to dementia. Migraine is frequent. A single photon emission computed tomographic (SPECT) study of this disorder has not yet been published. METHODS We studied 13 individuals clinically and performed neuroimaging studies with MRI and SPECT. RESULTS Genetic analysis strongly supported linkage to the CADASIL locus, and the disease haplotype was found in six individuals. Analysis by single-strand confirmation polymorphism did not identify Notch3 mutations. All affected individuals had MRI white matter hyperintensities and four individuals had additional basal ganglial signal abnormalities. Four affected individuals had migraine, two of whom had slowly progressive dementia. TIAs, stroke, and focal neurologic signs were absent. Cerebral blood flow reduction in SPECT studies of affected individuals matched with MRI signal abnormalities. Cognitive impairment was linked to signal abnormalities and hypoperfusion in the basal ganglia. Demented patients had a pattern of frontal, temporal, and basal ganglial hypoperfusion. CONCLUSIONS We describe a CADASIL phenotype that is characterized by the absence of focal neurologic symptoms and present the first SPECT study of this disorder.
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Affiliation(s)
- J K Mellies
- Department of Neurology, Städtische Kliniken Osnabrück, Germany
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Brauman A, Müller JA, Garcia JL, Brune A, Schink B. Fermentative degradation of 3-hydroxybenzoate in pure culture by a novel strictly anaerobic bacterium, Sporotomaculum hydroxybenzoicum gen. nov., sp. nov. Int J Syst Bacteriol 1998; 48 Pt 1:215-21. [PMID: 9542091 DOI: 10.1099/00207713-48-1-215] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A strictly anaerobic bacterium, strain BT, from termite hindgut homogenates, was isolated in pure culture and grew on 3-hydroxybenzoate as sole source of carbon and energy. No other substrate tested was degraded, sulfate, sulfite, thiosulfate, nitrate, ferric iron, oxygen or fumarate were not reduced, and no electron transfer to partner organisms was observed. 3-Hydroxybenzoate was fermented to butyrate, acetate and CO2. Benzoate was detected in the culture supernatant as an intermediate. The isolate was a slightly motile, endosporeforming Gram-positive rod; 16S rDNA sequence analysis revealed a high similarity to members of the genus Desulfotomaculum. The G + C content of the DNA was 48 mol%. Strain BT differs from the members of the genus Desulfotomaculum significantly due to its lack of dissimilatory sulfate reduction, and is therefore described as the type strain of a new genus and species. Sporotomaculum hydroxybenzoicum gen. nov., sp. nov.
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Affiliation(s)
- A Brauman
- Laboratoire ORSTOM de Microbiologie des Anaérobies, Université de Provence, Marseille, France
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Müller JA. [Comment on A. Hohmann, W. Rüssmann, F.A. Kaszli: Quality of vision screening in childhood]. Klin Monbl Augenheilkd 1997; 211:48. [PMID: 9556385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Schober O, Meyer GJ, Duden C, Lauenstein L, Niggemann J, Müller JA, Gaab MR, Becker H, Dietz H, Hundeshagen H. [Amino acid uptake in brain tumors using positron emission tomography as an indicator for evaluating metabolic activity and malignancy]. ROFO-FORTSCHR RONTG 1987; 147:503-9. [PMID: 2825284 DOI: 10.1055/s-2008-1048688] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Diagnosis and post-therapeutic follow-up of tumour patients necessitates morphological and particularly functional imaging methods. For the latter approach positron emission tomography has proven a valid tool for the measurement of perfusion, of energy consumption parameters such as oxygen extraction, glucose metabolism and amino acid uptake. However, neither perfusion nor energy consumption parameters have yielded unambiguous information on the clinical status of various tumours in respect of their malignancy and their growth status. It is shown in this paper that amino acid uptake seems to be a valid measure for the functional activity of tumour tissue for a broad range of neoplasms. The uptake of 11C-L-Methionine was measured in 33 patients having various brain tumours, and was compared with 6 patients who had an infarction, and with 8 patients suffering from arachnoidal cysts. The amino acid uptake correlated well with the histological grading of the tumours and the clinical status of the patient. The uptake was well differentiated against metabolically inactive lesions. Parallel investigations on the uptake mechanisms of amino acids in an animal model have shown that transport phenomena regulate the uptake rather than protein synthesis rates. However, protein synthesis may nevertheless exercise a control function on the transport process.
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Affiliation(s)
- O Schober
- Abteilung Nuklearmedizin und spezielle Biophysik, Medizinische Hochschule Hannover
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Schober O, Duden C, Meyer GJ, Müller JA, Hundeshagen H. Non selective transport of [11C-methyl]-L-and D-methionine into a malignant glioma. Eur J Nucl Med 1987; 13:103-5. [PMID: 3038558 DOI: 10.1007/bf00256026] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Images obtained by X-ray CT, brain scintigraphy (99mTc-DTPA) and positron emission tomography (PET) with [11C-methyl]-L- and D-methionine in a case of malignant glioma are presented, showing good agreement of PET and CT findings, in particular nearly identical localization of L- and D-methionine accumulation, whereas the blood brain barrier is only slightly disturbed. In a greater number of patients the amount of accumulated stereoisomers do not differ on a significant level, indicating that a raised transport rate mediated by a carrier of low stereospecifity seems to contribute substantially to the increased uptake of [11C-methyl]-L-methionine in human brain tumors. Several cerebral functions and diseases have been studied with positron emission tomography (PET), which represents a clinical tool for visualizing metabolic activities rather than morphologic lesions (Reivich et al. 1985; Mazziotta et al. 1986). With regard to the malignancy of brain tumors DiChiro et al. (1982, 1984, 1985a, b) showed a correlation between tumor grade and its glucose metabolism measured with 18F-fluorodeoxyglucose. An increased uptake of [11C-methyl]-L-methionine into tumor tissue has also been described (Hübner et al. 1980; Bergström et al. 1983; Kubota et al. 1984; Meyer et al. 1985; Schober et al. 1986b). Bustany et al. (1981, 1983, 1985a, b, 1986) developed a model for quantitative determination of protein synthesis, postulating that methionine incorporation into protein in brain tumors correlates with grade of malignancy. We do not believe that the uptake of [11C-methyl]-L-methionine mainly reflects protein synthesis.(ABSTRACT TRUNCATED AT 250 WORDS)
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Muckelmann R, Kunkel G, Staib F, Blohm B, Rudolph R, Mishra SK, Müller JA, Mast H, Sladek M. [Respiratory allergy caused by aspergillus species in the soil of potted plants (author's transl)]. Prax Klin Pneumol 1981; 35:363-6. [PMID: 7345433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Staib F, Bohl D, Foth B, Mishra SK, Rajendran C, Müller JA. [Fatal aspergillosis after infarction-induced pneumonia. A contribution to the epidemiology, diagnosis and prevention of aspergillosis of the lungs (author's transl)]. Prax Klin Pneumol 1980; 34:732-738. [PMID: 7465534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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Abstract
In an 8-year-old girl with cystic fibrosis Aspergillus fumigatus infection of the lung was diagnosed. Pot-plant soil as reservior of Aspergillus fumigatus was shown to be the source of inhalable Aspergillus fumigatus units within the clinic. Cystic fibrosis mucus of the patient acted as nutritive substrate for Aspergillus fumigatus. Consequent exclusion of pot plants in housing and hospital rooms is considered necessary for prevention of Aspergillus fumigatus infection in patients with cystic fibrosis.
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