1
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Bérouti M, Lammens K, Heiss M, Hansbauer L, Bauernfried S, Stöckl J, Pinci F, Piseddu I, Greulich W, Wang M, Jung C, Fröhlich T, Carell T, Hopfner KP, Hornung V. Lysosomal endonuclease RNase T2 and PLD exonucleases cooperatively generate RNA ligands for TLR7 activation. Immunity 2024:S1074-7613(24)00215-2. [PMID: 38697119 DOI: 10.1016/j.immuni.2024.04.010] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 03/06/2024] [Accepted: 04/12/2024] [Indexed: 05/04/2024]
Abstract
Toll-like receptor 7 (TLR7) is essential for recognition of RNA viruses and initiation of antiviral immunity. TLR7 contains two ligand-binding pockets that recognize different RNA degradation products: pocket 1 recognizes guanosine, while pocket 2 coordinates pyrimidine-rich RNA fragments. We found that the endonuclease RNase T2, along with 5' exonucleases PLD3 and PLD4, collaboratively generate the ligands for TLR7. Specifically, RNase T2 generated guanosine 2',3'-cyclic monophosphate-terminated RNA fragments. PLD exonuclease activity further released the terminal 2',3'-cyclic guanosine monophosphate (2',3'-cGMP) to engage pocket 1 and was also needed to generate RNA fragments for pocket 2. Loss-of-function studies in cell lines and primary cells confirmed the critical requirement for PLD activity. Biochemical and structural studies showed that PLD enzymes form homodimers with two ligand-binding sites important for activity. Previously identified disease-associated PLD mutants failed to form stable dimers. Together, our data provide a mechanistic basis for the detection of RNA fragments by TLR7.
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Affiliation(s)
- Marleen Bérouti
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität, Munich, Germany
| | - Katja Lammens
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität, Munich, Germany
| | - Matthias Heiss
- Department of Chemistry, Ludwig-Maximilians-Universität, Munich, Germany
| | - Larissa Hansbauer
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität, Munich, Germany
| | - Stefan Bauernfried
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität, Munich, Germany
| | - Jan Stöckl
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität, Munich, Germany
| | - Francesca Pinci
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität, Munich, Germany
| | - Ignazio Piseddu
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität, Munich, Germany; Department of Medicine II, University Hospital Munich, Munich, Germany
| | - Wilhelm Greulich
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität, Munich, Germany
| | - Meiyue Wang
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität, Munich, Germany
| | - Christophe Jung
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität, Munich, Germany
| | - Thomas Fröhlich
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität, Munich, Germany
| | - Thomas Carell
- Department of Chemistry, Ludwig-Maximilians-Universität, Munich, Germany
| | - Karl-Peter Hopfner
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität, Munich, Germany
| | - Veit Hornung
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität, Munich, Germany.
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2
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Pichler A, Hillmeier M, Heiss M, Peev E, Xefteris S, Steigenberger B, Thoma I, Müller M, Borsò M, Imhof A, Carell T. Synthesis and Structure Elucidation of Glutamyl-Queuosine. J Am Chem Soc 2023; 145:25528-25532. [PMID: 37967838 PMCID: PMC10690763 DOI: 10.1021/jacs.3c10075] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/24/2023] [Accepted: 10/26/2023] [Indexed: 11/17/2023]
Abstract
Queuosine is one of the most complex hypermodified RNA nucleosides found in the Wobble position of tRNAs. In addition to Queuosine itself, several further modified derivatives are known, where the cyclopentene ring structure is additionally modified by a galactosyl-, a mannosyl-, or a glutamyl-residue. While sugar-modified Queuosine derivatives are found in the tRNAs of vertebrates, glutamylated Queuosine (gluQ) is only known in bacteria. The exact structure of gluQ, particularly with respect to how and where the glutamyl side chain is connected to the Queuosine cyclopentene side chain, is unknown. Here we report the first synthesis of gluQ and, using UHPLC-MS-coinjection and NMR studies, we show that the isolated natural gluQ is the α-allyl-connected gluQ compound.
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Affiliation(s)
- Alexander Pichler
- Department
of Chemistry, Institute of Chemical Epigenetics,
Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 Munich, Germany
| | - Markus Hillmeier
- Department
of Chemistry, Institute of Chemical Epigenetics,
Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 Munich, Germany
| | - Matthias Heiss
- Department
of Chemistry, Institute of Chemical Epigenetics,
Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 Munich, Germany
| | - Elsa Peev
- Department
of Chemistry, Institute of Chemical Epigenetics,
Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 Munich, Germany
| | - Stylianos Xefteris
- Department
of Chemistry, Institute of Chemical Epigenetics,
Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 Munich, Germany
| | - Barbara Steigenberger
- Mass
Spectrometry Core Facility, Max Planck Institute
of Biochemistry, Am Klopferspitz 18, Martinsried, 82152, Planegg, Germany
| | - Ines Thoma
- Department
of Chemistry, Institute of Chemical Epigenetics,
Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 Munich, Germany
| | - Markus Müller
- Department
of Chemistry, Institute of Chemical Epigenetics,
Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 Munich, Germany
| | - Marco Borsò
- Department
of Molecular Biology, Biomedical Center (BMC), Faculty of Medicine, Ludwig-Maximilians-Universität München, Großhaderner Str. 9, Martinsried, 82152 Planegg, Germany
| | - Axel Imhof
- Department
of Molecular Biology, Biomedical Center (BMC), Faculty of Medicine, Ludwig-Maximilians-Universität München, Großhaderner Str. 9, Martinsried, 82152 Planegg, Germany
| | - Thomas Carell
- Department
of Chemistry, Institute of Chemical Epigenetics,
Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 Munich, Germany
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3
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Witzenberger M, Burczyk S, Settele D, Mayer W, Welp L, Heiss M, Wagner M, Monecke T, Janowski R, Carell T, Urlaub H, Hauck S, Voigt A, Niessing D. Human TRMT2A methylates tRNA and contributes to translation fidelity. Nucleic Acids Res 2023; 51:8691-8710. [PMID: 37395448 PMCID: PMC10484741 DOI: 10.1093/nar/gkad565] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 06/13/2023] [Accepted: 06/21/2023] [Indexed: 07/04/2023] Open
Abstract
5-Methyluridine (m5U) is one of the most abundant RNA modifications found in cytosolic tRNA. tRNA methyltransferase 2 homolog A (hTRMT2A) is the dedicated mammalian enzyme for m5U formation at tRNA position 54. However, its RNA binding specificity and functional role in the cell are not well understood. Here we dissected structural and sequence requirements for binding and methylation of its RNA targets. Specificity of tRNA modification by hTRMT2A is achieved by a combination of modest binding preference and presence of a uridine in position 54 of tRNAs. Mutational analysis together with cross-linking experiments identified a large hTRMT2A-tRNA binding surface. Furthermore, complementing hTRMT2A interactome studies revealed that hTRMT2A interacts with proteins involved in RNA biogenesis. Finally, we addressed the question of the importance of hTRMT2A function by showing that its knockdown reduces translation fidelity. These findings extend the role of hTRMT2A beyond tRNA modification towards a role in translation.
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Affiliation(s)
- Monika Witzenberger
- Institute of Structural Biology, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
| | - Sandra Burczyk
- Institute of Pharmaceutical Biotechnology, Ulm University, Ulm, Germany
| | - David Settele
- Institute of Structural Biology, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
| | - Wieland Mayer
- Institute of Pharmaceutical Biotechnology, Ulm University, Ulm, Germany
| | - Luisa M Welp
- Bioanalytical Mass Spectrometry Group, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Institute of Clinical Chemistry, University Medical Center Göttingen, Göttingen, Germany
| | - Matthias Heiss
- Department of Chemistry and Biochemistry, Ludwig-Maximilians University Munich, München, Germany
| | - Mirko Wagner
- Department of Chemistry and Biochemistry, Ludwig-Maximilians University Munich, München, Germany
| | - Thomas Monecke
- Institute of Pharmaceutical Biotechnology, Ulm University, Ulm, Germany
| | - Robert Janowski
- Institute of Structural Biology, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
| | - Thomas Carell
- Department of Chemistry and Biochemistry, Ludwig-Maximilians University Munich, München, Germany
| | - Henning Urlaub
- Bioanalytical Mass Spectrometry Group, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Institute of Clinical Chemistry, University Medical Center Göttingen, Göttingen, Germany
| | - Stefanie M Hauck
- Metabolomics and Proteomics Core, Research Unit Protein Science, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
| | - Aaron Voigt
- Department of Neurology, Faculty of Medicine, RWTH Aachen, Aachen, Germany
| | - Dierk Niessing
- Institute of Structural Biology, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
- Institute of Pharmaceutical Biotechnology, Ulm University, Ulm, Germany
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Kaiser S, Byrne SR, Ammann G, Asadi Atoi P, Borland K, Brecheisen R, DeMott MS, Gehrke T, Hagelskamp F, Heiss M, Yoluç Y, Liu L, Zhang Q, Dedon PC, Cao B, Kellner S. Strategien zur Vermeidung von Artefakten in der massenspektrometrischen Epitranskriptomanalytik. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106215] [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)
- Steffen Kaiser
- Ludwig-Maximilians Universität München Butenandtstr. 5–13 81137 München Deutschland
- Institut für Pharmazeutische Chemie Goethe-Universität Frankfurt Max-von-Laue-Str. 9 60438 Frankfurt Deutschland
| | - Shane R. Byrne
- Department of Biological Engineering and Center for Environmental Health Sciences Massachusetts Institute of Technology Cambridge MA 02139 USA
| | - Gregor Ammann
- Ludwig-Maximilians Universität München Butenandtstr. 5–13 81137 München Deutschland
| | - Paria Asadi Atoi
- Ludwig-Maximilians Universität München Butenandtstr. 5–13 81137 München Deutschland
| | - Kayla Borland
- Ludwig-Maximilians Universität München Butenandtstr. 5–13 81137 München Deutschland
| | | | - Michael S. DeMott
- Department of Biological Engineering and Center for Environmental Health Sciences Massachusetts Institute of Technology Cambridge MA 02139 USA
| | - Tim Gehrke
- Ella Biotech GmbH 82152 München Deutschland
| | - Felix Hagelskamp
- Ludwig-Maximilians Universität München Butenandtstr. 5–13 81137 München Deutschland
| | - Matthias Heiss
- Ludwig-Maximilians Universität München Butenandtstr. 5–13 81137 München Deutschland
| | - Yasemin Yoluç
- Ludwig-Maximilians Universität München Butenandtstr. 5–13 81137 München Deutschland
| | - Lili Liu
- College of Life Sciences Qufu Normal University Qufu Shandong 273165 China
| | - Qinghua Zhang
- College of Life Sciences Qufu Normal University Qufu Shandong 273165 China
| | - Peter C. Dedon
- Department of Biological Engineering and Center for Environmental Health Sciences Massachusetts Institute of Technology Cambridge MA 02139 USA
- Antimicrobial Resistance Interdisciplinary Research Group Singapore-Massachusetts Institute of Technology Alliance for Research and Technology 138602 Singapore Singapur
| | - Bo Cao
- College of Life Sciences Qufu Normal University Qufu Shandong 273165 China
| | - Stefanie Kellner
- Ludwig-Maximilians Universität München Butenandtstr. 5–13 81137 München Deutschland
- Institut für Pharmazeutische Chemie Goethe-Universität Frankfurt Max-von-Laue-Str. 9 60438 Frankfurt Deutschland
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5
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Kaiser S, Byrne SR, Ammann G, Asadi Atoi P, Borland K, Brecheisen R, DeMott MS, Gehrke T, Hagelskamp F, Heiss M, Yoluç Y, Liu L, Zhang Q, Dedon PC, Cao B, Kellner S. Strategies to Avoid Artifacts in Mass Spectrometry-Based Epitranscriptome Analyses. Angew Chem Int Ed Engl 2021; 60:23885-23893. [PMID: 34339593 PMCID: PMC8597057 DOI: 10.1002/anie.202106215] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Indexed: 11/05/2022]
Abstract
In this report, we perform structure validation of recently reported RNA phosphorothioate (PT) modifications, a new set of epitranscriptome marks found in bacteria and eukaryotes including humans. By comparing synthetic PT-containing diribonucleotides with native species in RNA hydrolysates by high-resolution mass spectrometry (MS), metabolic stable isotope labeling, and PT-specific iodine-desulfurization, we disprove the existence of PTs in RNA from E. coli, S. cerevisiae, human cell lines, and mouse brain. Furthermore, we discuss how an MS artifact led to the initial misidentification of 2'-O-methylated diribonucleotides as RNA phosphorothioates. To aid structure validation of new nucleic acid modifications, we present a detailed guideline for MS analysis of RNA hydrolysates, emphasizing how the chosen RNA hydrolysis protocol can be a decisive factor in discovering and quantifying RNA modifications in biological samples.
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Affiliation(s)
- Steffen Kaiser
- Ludwig-Maximilians Universität MünchenButenandtstr. 5–1381137MünchenDeutschland
- Institute of Pharmaceutical ChemistryGoethe-University FrankfurtMax-von-Laue-Str. 960438FrankfurtGermany
| | - Shane R. Byrne
- Department of Biological Engineering and Center for Environmental Health SciencesMassachusetts Institute of TechnologyCambridgeMA02139USA
| | - Gregor Ammann
- Ludwig-Maximilians Universität MünchenButenandtstr. 5–1381137MünchenDeutschland
| | - Paria Asadi Atoi
- Ludwig-Maximilians Universität MünchenButenandtstr. 5–1381137MünchenDeutschland
| | - Kayla Borland
- Ludwig-Maximilians Universität MünchenButenandtstr. 5–1381137MünchenDeutschland
| | | | - Michael S. DeMott
- Department of Biological Engineering and Center for Environmental Health SciencesMassachusetts Institute of TechnologyCambridgeMA02139USA
| | | | - Felix Hagelskamp
- Ludwig-Maximilians Universität MünchenButenandtstr. 5–1381137MünchenDeutschland
| | - Matthias Heiss
- Ludwig-Maximilians Universität MünchenButenandtstr. 5–1381137MünchenDeutschland
| | - Yasemin Yoluç
- Ludwig-Maximilians Universität MünchenButenandtstr. 5–1381137MünchenDeutschland
| | - Lili Liu
- College of Life SciencesQufu Normal UniversityQufuShandong273165China
| | - Qinghua Zhang
- College of Life SciencesQufu Normal UniversityQufuShandong273165China
| | - Peter C. Dedon
- Department of Biological Engineering and Center for Environmental Health SciencesMassachusetts Institute of TechnologyCambridgeMA02139USA
- Antimicrobial Resistance Interdisciplinary Research GroupSingapore-Massachusetts Institute of Technology Alliance for Research and Technology138602SingaporeSingapore
| | - Bo Cao
- College of Life SciencesQufu Normal UniversityQufuShandong273165China
| | - Stefanie Kellner
- Ludwig-Maximilians Universität MünchenButenandtstr. 5–1381137MünchenDeutschland
- Institute of Pharmaceutical ChemistryGoethe-University FrankfurtMax-von-Laue-Str. 960438FrankfurtGermany
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6
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Heiss M, Hagelskamp F, Marchand V, Motorin Y, Kellner S. Cell culture NAIL-MS allows insight into human tRNA and rRNA modification dynamics in vivo. Nat Commun 2021; 12:389. [PMID: 33452242 PMCID: PMC7810713 DOI: 10.1038/s41467-020-20576-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 12/04/2020] [Indexed: 12/16/2022] Open
Abstract
Recently, studies about RNA modification dynamics in human RNAs are among the most controversially discussed. As a main reason, we identified the unavailability of a technique which allows the investigation of the temporal processing of RNA transcripts. Here, we present nucleic acid isotope labeling coupled mass spectrometry (NAIL-MS) for efficient, monoisotopic stable isotope labeling in both RNA and DNA in standard cell culture. We design pulse chase experiments and study the temporal placement of modified nucleosides in tRNAPhe and 18S rRNA. In existing RNAs, we observe a time-dependent constant loss of modified nucleosides which is masked by post-transcriptional methylation mechanisms and thus undetectable without NAIL-MS. During alkylation stress, NAIL-MS reveals an adaptation of tRNA modifications in new transcripts but not existing ones. Overall, we present a fast and reliable stable isotope labeling strategy which allows in-depth study of RNA modification dynamics in human cell culture.
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Affiliation(s)
- Matthias Heiss
- Department of Chemistry, Ludwig-Maximilians-University Munich, Butenandtstr. 5-13, 81377, Munich, Germany
| | - Felix Hagelskamp
- Department of Chemistry, Ludwig-Maximilians-University Munich, Butenandtstr. 5-13, 81377, Munich, Germany
| | - Virginie Marchand
- Université de Lorraine, CNRS, Inserm, UMS2008/US40 IBSLor and UMR7365 IMoPA, F-54000, Nancy, France
| | - Yuri Motorin
- Université de Lorraine, CNRS, Inserm, UMS2008/US40 IBSLor and UMR7365 IMoPA, F-54000, Nancy, France
| | - Stefanie Kellner
- Department of Chemistry, Ludwig-Maximilians-University Munich, Butenandtstr. 5-13, 81377, Munich, Germany.
- Institute of Pharmaceutical Chemistry, Goethe-University Frankfurt, Max-von-Laue-Str, 9, 60438, Frankfurt, Germany.
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7
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Abstract
Recent progress in epitranscriptome research shows an interplay of enzymes modifying RNAs and enzymes dedicated for RNA modification removal. One of the main techniques to study RNA modifications is liquid chromatography-coupled tandem mass spectrometry (LC-MS/MS) as it allows sensitive detection of modified nucleosides. Although RNA modifications have been found to be highly dynamic, state-of-the-art LC-MS/MS analysis only gives a static view on modifications and does not allow the investigation of temporal modification placement. Here, we present the principles of nucleic acid isotope labeling coupled with mass spectrometry, termed NAIL-MS, which overcomes these limitations by stable isotope labeling in human cell culture and gives detailed instructions on how to label cells and process samples in order to get reliable results. For absolute quantification in the context of NAIL-MS, we explain the production of internal standards in detail. Furthermore, we outline the requirements for stable isotope labeling in cell culture and all subsequent steps to receive nucleoside mixtures of native RNA for NAIL-MS analysis. In the final section of this chapter, we describe the distinctive features of NAIL-MS data analysis with a special focus toward absolute quantification of modified nucleosides.
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Affiliation(s)
- Matthias Heiss
- Department of Chemistry, Ludwig Maximilians University Munich, Munich, Germany
| | - Kayla Borland
- Department of Chemistry, Ludwig Maximilians University Munich, Munich, Germany
| | - Yasemin Yoluç
- Department of Chemistry, Ludwig Maximilians University Munich, Munich, Germany
| | - Stefanie Kellner
- Department of Chemistry, Ludwig Maximilians University Munich, Munich, Germany.
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8
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Thumbs P, Ensfelder TT, Hillmeier M, Wagner M, Heiss M, Scheel C, Schön A, Müller M, Michalakis S, Kellner S, Carell T. Synthese von Galaktosyl‐Queuosin und Verteilung von hypermodifizierten Q‐Nukleosiden in Mausgeweben. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202002295] [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: 11/09/2022]
Affiliation(s)
- Peter Thumbs
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 München Deutschland
| | - Timm T. Ensfelder
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 München Deutschland
| | - Markus Hillmeier
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 München Deutschland
| | - Mirko Wagner
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 München Deutschland
| | - Matthias Heiss
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 München Deutschland
| | - Constanze Scheel
- Department Pharmazie Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 München Deutschland
| | - Alexander Schön
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 München Deutschland
| | - Markus Müller
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 München Deutschland
| | - Stylianos Michalakis
- Department Pharmazie Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 München Deutschland
- Department für Augenheilkunde Ludwig-Maximilians-Universität München Mathildenstr. 8 80336 München Deutschland
| | - Stefanie Kellner
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 München Deutschland
| | - Thomas Carell
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 München Deutschland
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9
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Thumbs P, Ensfelder TT, Hillmeier M, Wagner M, Heiss M, Scheel C, Schön A, Müller M, Michalakis S, Kellner S, Carell T. Synthesis of Galactosyl-Queuosine and Distribution of Hypermodified Q-Nucleosides in Mouse Tissues. Angew Chem Int Ed Engl 2020; 59:12352-12356. [PMID: 32160400 PMCID: PMC7384130 DOI: 10.1002/anie.202002295] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Indexed: 11/14/2022]
Abstract
Queuosine (Q) is a hypermodified RNA nucleoside that is found in tRNAHis, tRNAAsn, tRNATyr, and tRNAAsp. It is located at the wobble position of the tRNA anticodon loop, where it can interact with U as well as C bases located at the respective position of the corresponding mRNA codons. In tRNATyr and tRNAAsp of higher eukaryotes, including humans, the Q base is for yet unknown reasons further modified by the addition of a galactose and a mannose sugar, respectively. The reason for this additional modification, and how the sugar modification is orchestrated with Q formation and insertion, is unknown. Here, we report a total synthesis of the hypermodified nucleoside galactosyl‐queuosine (galQ). The availability of the compound enabled us to study the absolute levels of the Q‐family nucleosides in six different organs of newborn and adult mice, and also in human cytosolic tRNA. Our synthesis now paves the way to a more detailed analysis of the biological function of the Q‐nucleoside family.
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Affiliation(s)
- Peter Thumbs
- Department of ChemistryLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
| | - Timm T. Ensfelder
- Department of ChemistryLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
| | - Markus Hillmeier
- Department of ChemistryLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
| | - Mirko Wagner
- Department of ChemistryLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
| | - Matthias Heiss
- Department of ChemistryLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
| | - Constanze Scheel
- Department of PharmacyLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
| | - Alexander Schön
- Department of ChemistryLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
| | - Markus Müller
- Department of ChemistryLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
| | - Stylianos Michalakis
- Department of PharmacyLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
- Department of OphthalmologyLudwig-Maximilians-Universität MünchenMathildenstr. 880336MunichGermany
| | - Stefanie Kellner
- Department of ChemistryLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
| | - Thomas Carell
- Department of ChemistryLudwig-Maximilians-Universität MünchenButenandtstr. 5–1381377MunichGermany
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Reichle VF, Kaiser S, Heiss M, Hagelskamp F, Borland K, Kellner S. Surpassing limits of static RNA modification analysis with dynamic NAIL-MS. Methods 2019; 156:91-101. [DOI: 10.1016/j.ymeth.2018.10.025] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 10/25/2018] [Accepted: 10/31/2018] [Indexed: 01/27/2023] Open
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Y.Hokii, Carey C, Heiss M, Joshi G. Fluoride ion release/recharge behavior of ion-releasing restorative materials. Dent Mater 2019. [DOI: 10.1016/j.dental.2019.08.035] [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: 10/25/2022]
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12
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Abstract
RNA in yeast, especially rRNA and tRNA are heavily modified to fulfill their function in protein translation. Using biosynthetic stable isotope labeled internal standards we quantified 12 modified nucleosides in tRNA from S. cerevisiae over 24 hours. We observed different quantities of modified nucleosides in dependence of the growth phase. To elucidate the underlying mechanism of the observed tRNA modification profile adaptation, it is necessary to distinguish the pre-existing tRNA pool and its modifications from newly-synthesized tRNAs. By combination of 2 differentially isotope labeled media we developed NAIL-MS, nucleic acid isotope labeling coupled mass spectrometry. During the yeast growth cycle we observe dilution of pre-existing tRNAs by newly-synthesized tRNAs by the growing number of cells. tRNA was found to be highly stable with only little degradation over the observed period. The method was further used to quantify the levels of modified nucleosides in the original and new tRNA pools. By addition of deuterium-labeled methionine, we could observe the incorporation of new methyl marks on pre-existing tRNAs. For 2'-O-methylcytidine (Cm) we observed a global increase in log phase. We identified extensive 2'-OH-cytidine methylation of the pre-existing tRNAs and the new tRNAs which masks an actual decrease of pre-existing Cm. In contrast, global 5-methylcytidine (m5C) levels decreased during growth due to a drop in m5C quantities in the original tRNA pool. The NAIL-MS data suggests different mechanisms for tRNA modification adaptation depending on the individual modification observed. With this new tool it is possible to follow the fate of methylated RNAs during growth and potentially compare the impact of different stress conditions on the epitranscriptome.
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Affiliation(s)
- Matthias Heiss
- a Department of Chemistry , Ludwig-Maximilians-Universität München , Munich , Germany
| | - Valentin F Reichle
- a Department of Chemistry , Ludwig-Maximilians-Universität München , Munich , Germany
| | - Stefanie Kellner
- a Department of Chemistry , Ludwig-Maximilians-Universität München , Munich , Germany
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13
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Abstract
Nucleic acids, especially RNA, naturally contain a diversity of chemically modified nucleosides. To understand the biological role of these modified nucleosides, nucleic acid scientists need tools to specifically label, detect and enrich modified nucleic acids. These tools comprise a diverse set of chemical reagents which have been established in the early years of nucleic acid research. Recent developments in high-throughput sequencing and mass spectrometry utilize these chemical labeling strategies to efficiently detect and localize modifications in nucleic acids. As a consequence the transcriptome-wide distribution of modified nucleosides, especially 5-methylcytosine and pseudouridine, in all domains of life could be analyzed. With the help of these techniques and the gained knowledge, it becomes possible to understand the functions of modifications and even study their connections to human health and disease. Here, the differential chemical reactivity of modified nucleosides and their canonical counterpart is reviewed and discussed.
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Affiliation(s)
- Matthias Heiss
- a Department of Chemistry , Ludwig-Maximilians-Universität München , Butenandtstraße 5-13, Munich , Germany
| | - Stefanie Kellner
- a Department of Chemistry , Ludwig-Maximilians-Universität München , Butenandtstraße 5-13, Munich , Germany
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14
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Heiss M, Russo-Averchi E, Dalmau-Mallorquí A, Tütüncüoğlu G, Matteini F, Rüffer D, Conesa-Boj S, Demichel O, Alarcon-Lladó E, Fontcuberta i Morral A. III-V nanowire arrays: growth and light interaction. Nanotechnology 2014; 25:014015. [PMID: 24334728 DOI: 10.1088/0957-4484/25/1/014015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Semiconductor nanowire arrays are reproducible and rational platforms for the realization of high performing designs of light emitting diodes and photovoltaic devices. In this paper we present an overview of the growth challenges of III-V nanowire arrays obtained by molecular beam epitaxy and the design of III-V nanowire arrays on silicon for solar cells. While InAs tends to grow in a relatively straightforward manner on patterned (111)Si substrates, GaAs nanowires remain more challenging; success depends on the cleaning steps, annealing procedure, pattern design and mask thickness. Nanowire arrays might also be used for next generation solar cells. We discuss the photonic effects derived from the vertical configuration of nanowires standing on a substrate and how these are beneficial for photovoltaics. Finally, due to the special interaction of light with standing nanowires we also show that the Raman scattering properties of standing nanowires are modified. This result is important for fundamental studies on the structural and functional properties of nanowires.
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15
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Dutto F, Heiss M, Lovera A, López-Sánchez O, Fontcuberta I Morral A, Radenovic A. Enhancement of second harmonic signal in nanofabricated cones. Nano Lett 2013; 13:6048-6054. [PMID: 24261488 DOI: 10.1021/nl403279y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Geometrical effects in optical nanostructures on nanoscale can lead to interesting phenomena such as inhibition of spontaneous emission,1,2 high-reflecting omnidirectional mirrors, structures that exhibit low-loss-waveguiding,3 and light confinement.4,5 Here, we demonstrate a similar concept of exploiting the geometrical effects on nanoscale through precisely fabricating lithium niobate (LiNbO3) nanocones arrays devices. We show a strong second harmonic generation (SHG) enhancement, shape and arrangement dependent, up to 4 times bigger than the bulk one. These devices allow below diffraction limited observation, being perfect platforms for single molecule fluorescence microscopy6 or single cell endoscopy.7 Nanocones create a confined illumination volume, devoid from blinking and bleaching, which can excite molecules in nanocones proximity. Illumination volume can be increased by combining the SH enhancement effect with plasmon resonances, excited thanks to a gold plasmonic shell deposited around the nanostructures. This results in a local further enhancement of the SH signal up to 20 times. The global SH enhancement can be rationally designed and tuned through the means of simulations.
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Affiliation(s)
- F Dutto
- Laboratory of Nanoscale Biology, Institute of Bioengineering, ‡Laboratory of Semiconductor Materials, Institute of Materials , §Laboratory of Nanophotonics and Metrology, Institute of Micro Engineering, and ∥Laboratory of Nanoscale Electronics and Structures, Institute of Electrical Engineering, School of Engineering, EPFL , 1015 Lausanne, Switzerland
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16
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Russo-Averchi E, Dalmau-Mallorquí A, Canales-Mundet I, Tütüncüoğlu G, Alarcon-Llado E, Heiss M, Rüffer D, Conesa-Boj S, Caroff P, Fontcuberta i Morral A. Growth mechanisms and process window for InAs V-shaped nanoscale membranes on Si[001]. Nanotechnology 2013; 24:435603. [PMID: 24107441 DOI: 10.1088/0957-4484/24/43/435603] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Organized growth of high aspect-ratio nanostructures such as membranes is interesting for opto-electronic and energy harvesting applications. Recently, we reported a new form of InAs nano-membranes grown on Si substrates with enhanced light scattering properties. In this paper we study how to tune the morphology of the membranes by changing the growth conditions. We examine the role of the V/III ratio, substrate temperature, mask opening size and inter-hole distances in determining the size and shape of the structures. Our results show that the nano-membranes form by a combination of the growth mechanisms of nanowires and the Stranski-Krastanov type of quantum dots: in analogy with nanowires, the length of the membranes strongly depends on the growth temperature and the V/III ratio; the inter-hole distance of the sample determines two different growth regimes: competitive growth for small distances and an independent regime for larger distances. Conversely, and similarly to quantum dots, the width of the nano-membranes increases with the growth temperature and does not exhibit dependence on the V/III ratio. These results constitute an important step towards achieving rational design of high aspect-ratio nanostructures.
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Affiliation(s)
- E Russo-Averchi
- Laboratoire des Matériaux Semiconducteurs, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
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17
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Heiss M, Fontana Y, Gustafsson A, Wüst G, Magen C, O'Regan DD, Luo JW, Ketterer B, Conesa-Boj S, Kuhlmann AV, Houel J, Russo-Averchi E, Morante JR, Cantoni M, Marzari N, Arbiol J, Zunger A, Warburton RJ, Fontcuberta i Morral A. Self-assembled quantum dots in a nanowire system for quantum photonics. Nat Mater 2013; 12:439-44. [PMID: 23377293 DOI: 10.1038/nmat3557] [Citation(s) in RCA: 164] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 12/21/2012] [Indexed: 05/24/2023]
Abstract
Quantum dots embedded within nanowires represent one of the most promising technologies for applications in quantum photonics. Whereas the top-down fabrication of such structures remains a technological challenge, their bottom-up fabrication through self-assembly is a potentially more powerful strategy. However, present approaches often yield quantum dots with large optical linewidths, making reproducibility of their physical properties difficult. We present a versatile quantum-dot-in-nanowire system that reproducibly self-assembles in core-shell GaAs/AlGaAs nanowires. The quantum dots form at the apex of a GaAs/AlGaAs interface, are highly stable, and can be positioned with nanometre precision relative to the nanowire centre. Unusually, their emission is blue-shifted relative to the lowest energy continuum states of the GaAs core. Large-scale electronic structure calculations show that the origin of the optical transitions lies in quantum confinement due to Al-rich barriers. By emitting in the red and self-assembling on silicon substrates, these quantum dots could therefore become building blocks for solid-state lighting devices and third-generation solar cells.
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Affiliation(s)
- M Heiss
- Laboratoire des Matériaux Semiconducteurs, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
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18
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Schmalfeldt B, Seck K, Gonschior AK, Gilet H, Heiss M, Hennig M, Moehler M, Schulze E, Wimberger P, Parsons SL. Quality of life in patients with malignant ascites and after treatment with catumaxomab: results from a phase II/III study comparing paracentesis plus catumaxomab with paracentesis alone. Geburtshilfe Frauenheilkd 2012. [DOI: 10.1055/s-0032-1309205] [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] Open
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19
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Heiss M, Tschirschmann M, Seimetz D, Ströhlein M, Hennig M. The role of relative lymphocyte counts for the effect of catumaxomab on overall survival in ovarian cancer patients with malignant ascites: Results from a phase ll/lll trial. Gynecol Oncol 2012. [DOI: 10.1016/j.ygyno.2011.12.213] [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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20
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Lange J, Heiss M, Wappler F, Sakka SG. Unexpected effects on arterial oxygenation during reduction in oxygen flow via a pumpless lung assist system. Minerva Anestesiol 2011; 77:375-377. [PMID: 21242951] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The authors describe the effect of marked increase in PaO2 in a patient with acute respiratory distress syndrome and treatment by a pumpless extracorporeal lung assist following reduction in oxygen sweep flow.
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Affiliation(s)
- J Lange
- Department of General and Visceral Surgery, University Hospital of Witten/Herdecke, Medical Center Cologne-Merheim, Germany
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21
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Jäger M, Schoberth A, Hennig M, Burges A, Heiss M, Wimberger P, Schmalfeldt B, Lindhofer H. The trifunctional antibody catumaxomab (anti-EpCAM × anti-CD3) in patients with malignant ascites: Immunomonitoring results of a pivotal phase II/III study (pooled population). J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.2521] [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: 11/20/2022] Open
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22
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Xiang Y, Zardo I, Cao LY, Garma T, Heiss M, Morante JR, Arbiol J, Brongersma ML, Fontcuberta I Morral A. Spatially resolved Raman spectroscopy on indium-catalyzed core-shell germanium nanowires: size effects. Nanotechnology 2010; 21:105703. [PMID: 20154375 DOI: 10.1088/0957-4484/21/10/105703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The structure of indium-catalyzed germanium nanowires is investigated by atomic force microscopy, scanning confocal Raman spectroscopy and transmission electron microscopy. The nanowires are formed by a crystalline core and an amorphous shell. We find that the diameter of the crystalline core varies along the nanowire, down to few nanometers. Phonon confinement effects are observed in the regions where the crystalline region is the thinnest. The results are consistent with the thermally insulating behavior of the core-shell nanowires.
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Affiliation(s)
- Y Xiang
- Physik Department, Walter Schottky Institut, Technische Universitaet Muenchen, Am Coulombwall 3, D-85748 Garching, Germany
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23
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Heiss M, Linke R, Friccius-Quecke H, Klein A, Hennig M, Lindhofer H, Parsons S. 6507 Catumaxomab treatment in gastric-cancer patients with malignant ascites – subgroup-analysis of a pivotal trial. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)71229-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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24
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Parsons S, Hennig M, Linke R, Klein A, Lahr A, Lindhofer H, Heiss M. Clinical benefit of catumaxomab in malignant ascites in patient subpopulations in a pivotal phase II/III trial. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e14000] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e14000 Background: Parsons et al. (ASCO 2008) reported the results of a pivotal phase II/III trial in patients with malignant ascites due to epithelial cancer. Treatment with the trifunctional antibody catumaxomab resulted in a clinically relevant prolongation of puncture-free survival, defined as the time to the next therapeutic puncture or the time to death, whichever occurred first. Malignant ascites is a typical late-stage manifestation of cancer associated with a poor prognosis and survival. Effective treatment options are limited. It is thus of special interest if all patient subgroups derive objective benefit from treatment. Methods: A post-hoc analysis was performed on the 258 patients with epithelial tumors treated with catumaxomab + paracentesis or paracentesis alone (control) in the pivotal trial to investigate any association between the primary endpoint (puncture-free survival) and the primary tumor, metastases, or other prognostic parameters. Results: Puncture-free survival was lower in patients with non-ovarian vs ovarian tumors and those with a poor prognosis (metastases vs no metastases, elderly vs younger, or low vs serum protein level). However, there was always a statistically significant treatment effect for catumaxomab compared with the respective control group (p≤0.0001, log rank test, for all comparisons) (see table). Conclusion: Catumaxomab demonstrated a significant clinical benefit in patients with malignant ascites independent of the primary tumor or other prognostic factors. Therefore, catumaxomab could be considered as a treatment option for patients with a poor prognosis. [Table: see text] [Table: see text]
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Affiliation(s)
- S. Parsons
- Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany
| | - M. Hennig
- Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany
| | - R. Linke
- Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany
| | - A. Klein
- Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany
| | - A. Lahr
- Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany
| | - H. Lindhofer
- Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany
| | - M. Heiss
- Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany
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25
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Bokemeyer C, Heiss M, Gamperl H, Linke R, Schulze E, Friccius-Quecke H, Lindhofer H, Parsons S. Safety of catumaxomab: Cytokine-release-related symptoms as a possible predictive factor for efficacy in a pivotal phase II/III trial in malignant ascites. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.3036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
3036 Background: As a targeted immunotherapy, the trifunctional antibody catumaxomab specifically binds to epithelial cell-adhesion molecule (EpCAM) on tumor cells and attracts T-cells via CD3 and accessory cells via its FcγRI/III+ region. The clinical relevance of this mode of action was demonstrated by Parsons et al. (ASCO 2008) in a pivotal phase II/III trial. Catumaxomab treatment resulted in a clinically relevant prolongation of puncture-free survival (defined as time to next puncture or time to death, which ever occurred first) in patients with malignant ascites. One of the most common adverse events associated with catumaxomab is cytokine-release-related-symptoms (CRRSs), which might be of predictive value for efficacy. Methods: The safety profile of catumaxomab was identified in the pivotal study. CRRSs (pyrexia, nausea, and vomiting) were among the most common adverse events in the catumaxomab group. A correlation between CRRSs and puncture-free survival, the primary endpoint, was performed to investigate whether patients who had CRRSs benefited from catumaxomab treatment more than those who had no CRRSs. Results: Among 157 patients, CRRSs were limited to the duration of catumaxomab treatment, with a median onset of 1 day after catumaxomab administration and a median duration of 1–2 days. Most of these symptoms were mild to moderate and were manageable by standard symptomatic treatment. Only 6 of 101 patients with CRRSs who were treated with concomitant medication required systemic corticoid therapy. Puncture-free survival was longer (48 days) in patients with (81%) CRRSs during catumaxomab treatment than in patients without (19%) CRRSs (27 days), although the difference was not statistically significant (p=0.1546, log rank test). Conclusions: CRRSs are a common occurrence with catumaxomab, due to its mode of action, during the treatment of patients with malignant ascites. Since CRRSs appear to be correlated with efficacy, they may therefore be a predictive factor for catumaxomab efficacy. [Table: see text]
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Affiliation(s)
- C. Bokemeyer
- University Hospital Hamburg, Hamburg, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - M. Heiss
- University Hospital Hamburg, Hamburg, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - H. Gamperl
- University Hospital Hamburg, Hamburg, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - R. Linke
- University Hospital Hamburg, Hamburg, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - E. Schulze
- University Hospital Hamburg, Hamburg, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - H. Friccius-Quecke
- University Hospital Hamburg, Hamburg, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - H. Lindhofer
- University Hospital Hamburg, Hamburg, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - S. Parsons
- University Hospital Hamburg, Hamburg, Germany; Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; Fresenius Biotech GmbH, Munich, Germany; TRION Pharma GmbH, Munich, Germany; Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
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26
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Ströhlein M, Lordick F, Rüttinger D, Schemanski O, Jaeger M, Lindhofer H, Hennig M, Lahr A, Heiss M. Peritoneal carcinomatosis immunotherapy with the trifunctional anti-EpCAM x anti-CD3 antibody catumaxomab in patients with colon, gastric, or pancreatic cancer: Long-term results after a 2-year follow-up. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.3033] [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] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
3033 Background: Peritoneal carcinomatosis (PC) from gastrointestinal (GI) cancer is associated with a poor outcome. The trifunctional antibody catumaxomab may induce remission by redirecting T-lymphocytes and Fcγ-receptor I/III positive accessory cells to tumor cells. The aim of this study was to investigate the treatment of PC with intraperitoneal catumaxomab. Methods: Patients with epithelial cell adhesion molecule (EpCAM)-positive PC from GI cancer were enrolled in a multicenter phase I study and received four sequential intraperitoneal catumaxomab infusions on days 0, 3, 7, and 10 at increasing doses. Results: Twenty-four patients were enrolled. The maximum tolerated dose (MTD) was reached at 10, 20, 50, and 200 μg on days 0, 3, 7, and 10, respectively. The most common drug-related adverse events at the MTD were fever, vomiting, abdominal pain, skin toxicity, and nausea. Eleven of 17 evaluable patients (65%) were progression-free at final examination: one patient had a complete response and three patients had a partial response. EpCAM-positive cells in peritoneal lavage samples decreased in six of 10 evaluable patients. Patient survival was compared in a post hoc matched-pair analysis with PC patients treated with conventional intravenous chemotherapy. Median survival from the time of diagnosis of PC was 502 days in study patients versus 180 days in control patients (log-rank p = .0083). Conclusions: Intraperitoneal treatment with catumaxomab had an acceptable safety profile. Elimination of tumor cells from peritoneal lavage samples, delayed disease progression, and prolonged survival indicate that intraperitoneal catumaxomab is a promising option for the treatment of PC from GI cancer. [Table: see text]
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Affiliation(s)
- M. Ströhlein
- Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; University of Heidelberg, Heidelberg, Germany; Ludwig- Maximilians-University Munich, Munich, Germany; TRION Research GmbH, Martinsried, Germany; TRION Pharma GmbH, Munich, Germany; Fresenius Biotech GmbH, Munich, Germany
| | - F. Lordick
- Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; University of Heidelberg, Heidelberg, Germany; Ludwig- Maximilians-University Munich, Munich, Germany; TRION Research GmbH, Martinsried, Germany; TRION Pharma GmbH, Munich, Germany; Fresenius Biotech GmbH, Munich, Germany
| | - D. Rüttinger
- Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; University of Heidelberg, Heidelberg, Germany; Ludwig- Maximilians-University Munich, Munich, Germany; TRION Research GmbH, Martinsried, Germany; TRION Pharma GmbH, Munich, Germany; Fresenius Biotech GmbH, Munich, Germany
| | - O. Schemanski
- Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; University of Heidelberg, Heidelberg, Germany; Ludwig- Maximilians-University Munich, Munich, Germany; TRION Research GmbH, Martinsried, Germany; TRION Pharma GmbH, Munich, Germany; Fresenius Biotech GmbH, Munich, Germany
| | - M. Jaeger
- Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; University of Heidelberg, Heidelberg, Germany; Ludwig- Maximilians-University Munich, Munich, Germany; TRION Research GmbH, Martinsried, Germany; TRION Pharma GmbH, Munich, Germany; Fresenius Biotech GmbH, Munich, Germany
| | - H. Lindhofer
- Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; University of Heidelberg, Heidelberg, Germany; Ludwig- Maximilians-University Munich, Munich, Germany; TRION Research GmbH, Martinsried, Germany; TRION Pharma GmbH, Munich, Germany; Fresenius Biotech GmbH, Munich, Germany
| | - M. Hennig
- Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; University of Heidelberg, Heidelberg, Germany; Ludwig- Maximilians-University Munich, Munich, Germany; TRION Research GmbH, Martinsried, Germany; TRION Pharma GmbH, Munich, Germany; Fresenius Biotech GmbH, Munich, Germany
| | - A. Lahr
- Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; University of Heidelberg, Heidelberg, Germany; Ludwig- Maximilians-University Munich, Munich, Germany; TRION Research GmbH, Martinsried, Germany; TRION Pharma GmbH, Munich, Germany; Fresenius Biotech GmbH, Munich, Germany
| | - M. Heiss
- Merheim Medical Center, University of Witten-Herdecke, Cologne, Germany; University of Heidelberg, Heidelberg, Germany; Ludwig- Maximilians-University Munich, Munich, Germany; TRION Research GmbH, Martinsried, Germany; TRION Pharma GmbH, Munich, Germany; Fresenius Biotech GmbH, Munich, Germany
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Saad S, Arns W, Paul A, Nagelschmidt M, Heiss M, Treckmann J. [The way to establish laparoscopic donor nephrectomy as the method of choice in live kidney donation--a single centre experience]. Zentralbl Chir 2008; 133:188-92. [PMID: 18415910 DOI: 10.1055/s-2008-1004740] [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] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
INTRODUCTION In contrast to the USA, laparoscopic donor nephrectomy is rarely practised in German transplant centres. Safety concerns and difficulties with the learning curve of this advanced laparoscopic procedure are the main obstacles to the establishment of this operation. PATIENTS AND METHODS From 1998-2005, we performed laparoscopic kidney procurement in 50 live kidney donors on an intention to treat basis harvesting a total of 29 left and 21 right kidneys for transplantation. RESULTS Negative adverse effects on the donor side were temporary nerve irritation (2 patients) and postoperative retroperitoneal hematoma. Reasons to convert to open nephrectomy were bleeding (2 patients) and adhesions (1 patient). On the recipient side, one kidney was lost due to renal vein thrombosis. Three patients required short-time dialysis after transplantation. All other kidney transplants worked without any problems. CONCLUSION Laparoscopic donor nephrectomy is a safe procedure and has been established as the method of choice for live kidney donation in our hospital.
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Affiliation(s)
- S Saad
- Klinik für Viszeral-, Gefäss- und Transplantationschirurgie, Krankenhaus Köln-Merheim, Lehrstuhl I Chirurgie der Universität Witten/Herdecke.
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Saad S, Paul A, Treckmann J, Nagelschmidt M, Heiss M, Arns W. Laparoscopic live donor nephrectomy for right kidneys: Experience in a German community hospital. Surg Endosc 2007; 22:674-8. [PMID: 17623244 DOI: 10.1007/s00464-007-9459-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [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: 11/27/2022]
Abstract
BACKGROUND Laparoscopic live donor nephrectomy has become the new gold standard for kidney procurement in many high-volume transplant centres worldwide, but it is often limited to left-sided donor kidneys. Concerns about adequate anatomical renal vessel length and sufficient surgical exposure are the main obstacles to the use of the laparoscopic approach for right kidney live donors as well. MATERIAL AND METHODS From 1998 to 2006 we performed laparoscopic kidney procurement in 73 live kidney donors on an intention-to-treat basis, harvesting a total of 48 left (LKG) and 25 right kidneys (RKG) for transplantation. We compared these two groups with respect to operating time, conversion rate, complications, hospital stay, and recipient outcome. RESULTS There were no differences in outcome of donor patients after left (D-LKG) or right laparoscopic donor nephrectomy (D-RKG). Operating time was 160 min in D-RKG versus 164 min in D-LKG. Warm ischemia was below 150 s in both groups. Hospital stay was 7.0 (D-RKG) versus 6.7 days (D-LKG). Negative events on the donor site were one temporary nerve irritation in each group and one postoperative retroperitoneal hematoma in the left kidney group. Reasons to convert to open nephrectomy were bleeding in two patients in the left kidney group and adhesions in one patient in the right kidney group. The outcome of the recipients after left (R-LKG) or right kidney (R-RKG) transplantation was similar. One kidney was lost due to renal vein thrombosis (R-LKG). Postoperative ureter complications occurred in one patient of each group. One patient of the R-RKG and two patients of the R-LKG required lymphocele fenestration. All other kidney transplants worked without problems. CONCLUSION Laparoscopic donor nephrectomy is a safe procedure and has been established as the method of choice for live kidney donation in our clinic. Laparoscopic procurement of right and left kidneys can be performed with comparable quality and outcome for donors and recipients.
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Affiliation(s)
- S Saad
- Department for Visceral, Vascular and Transplantation Surgery, Clinic Cologne-Merheim, Cologne, Germany.
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Fournier C, Becker D, Winter M, Barberet P, Heiss M, Fischer B, Topsch J, Taucher-Scholz G. Cell Cycle-Related Bystander Responses are not Increased with LET after Heavy-Ion Irradiation. Radiat Res 2007; 167:194-206. [PMID: 17390727 DOI: 10.1667/rr0760.1] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [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: 11/03/2022]
Abstract
Evidence has accumulated that irradiated cells affect their unirradiated neighbors, so that they in turn display cellular responses typically associated with direct radiation exposure. These responses are generally known as bystander effects. In this study, cell cycle-related bystander responses were investigated in three strains of human fibroblasts after exposure to densely ionizing radiation. Varying the linear energy transfer (LET) from 11 to 15,000 keV microm(-1) allowed a study of the impact of the complexity of DNA damage in the inducing cells on the responses of bystander cells. Using both broad-beam and microbeam irradiation, transient bystander responses were obtained for the induction of CDKN1A (p21). The latter was also observed when the transmission of bystander signals was limited to soluble factors. Targeted irradiation of single cells in confluent cell monolayers revealed no correlation between the amount of CDKN1A protein in the bystander cells and the radial distance to the targeted cells. In line with the induction of CDKN1A in bystander cells after irradiation with different LETs, a transient delay in the first G1 phase after irradiation of G0/G1 cells was observed. However, the CDKN1A induction revealed no significant effect on premature terminal differentiation considered to underlie fibrosis in irradiated tissue. Thus the unchanged differentiation pattern in bystander cells does not indicate pronounced, long-lasting effects.
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Affiliation(s)
- C Fournier
- Department of Biophysics, Gesellschaft für Schwerionenforschung, 64291 Darmstadt, Germany.
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Du G, Fischer B, Barberet P, Heiss M. A fast online hit verification method for the single ion hit system at GSI. Radiat Prot Dosimetry 2006; 122:320-2. [PMID: 17164276 DOI: 10.1093/rpd/ncl435] [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: 05/13/2023]
Abstract
For a single ion hit facility built to irradiate specific targets inside biological cells, it is necessary to prove that the ions hit the selected targets reliably because the ion hits usually cannot be seen. That ability is traditionally tested either indirectly by aiming at pre-etched tracks in a nuclear track detector or directly by making the ion tracks inside cells visible using a stain coupled to special proteins produced in response to ion hits. However, both methods are time consuming and hits can be verified only after the experiment. This means that targeting errors in the experiment cannot be corrected during the experiment. Therefore, we have developed a fast online hit verification method that measures the targeting accuracy electronically with a spatial resolution of +/-1 microm before cell irradiation takes place.
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Affiliation(s)
- G Du
- Gesellschaft für Schwerionenforschung GSI, Planckstrasse 1, 64291 Darmstadt, Germany.
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Engel J, Kerr J, Eckel R, Günther B, Heiss M, Heitland W, Siewert JR, Jauch KW, Hölzel D. Influence of hospital volume on local recurrence and survival in a population sample of rectal cancer patients. Eur J Surg Oncol 2005; 31:512-20. [PMID: 15878259 DOI: 10.1016/j.ejso.2005.02.027] [Citation(s) in RCA: 35] [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] [Received: 11/09/2004] [Revised: 02/03/2005] [Accepted: 02/14/2005] [Indexed: 11/16/2022] Open
Abstract
AIMS To investigate the role of hospital volume and individual hospitals on long term outcomes (local recurrence and survival) of rectal cancer patients. METHODS One thousand thirty-eight patients with rectal cancer were diagnosed between 1996 and 1998. From these, we analysed 884 patients with a resected invasive primary rectal cancer. Median follow-up was 5.7 years. The impact of hospital volume (<10, 10-30 and >30 rectal cancer patients annually) on local recurrence and survival was examined in a Cox model. Differences between the four largest clinics in the high volume group were also investigated. RESULTS In the multivariate model predicting survival the following variables were significant: UICC stage, grade, age, local recurrence, and (neo-) adjuvant therapy treatment. In the multivariate model predicting local recurrence UICC stage, tumour localisation, and neoadjuvant therapy treatment were significant variables. Hospital volume was not a significant factor for survival or local recurrence. Within the high volume category one hospital showed significantly worse local recurrence rates than all other hospitals, but no survival difference could be seen between the four largest hospitals of the high volume group. CONCLUSIONS This analysis of a rectal cancer population found that hospital volume did not determine survival or local recurrence. Detailed clinical data with long term follow-up from cancer registries are vital to demonstrate the quality of routine care.
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Affiliation(s)
- J Engel
- Munich Cancer Registry, Munich Comprehensive Cancer Centre, Munich, Germany.
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Abstract
Outpatient surgery in dermatology is likely to become increasingly important in future, for a number of reasons. Current social legislation favors outpatient surgery, because hospitals must justify performing any procedure in the outpatient catalogue on an inpatient basis. The range of conditions being treated is also broadening, for example due to the growing popularity of aesthetic enhancement procedures. Epidemiological trends in skin cancer will also lead to considerable growth in demand for outpatient dermatological surgery. This article analyses current trends in ambulatory dermato-surgery, taking into account social, legislative, hygienic, legal and economic aspects. Measures to promote quality assurance are also described. The difficult cost situation facing outpatient surgery is creating a need for new forms of cooperation between primary care physicians and hospitals.
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Schoberth A, Prang N, Menzel H, Janni W, Braun S, Salat C, Heiss M, Kolb HJ, Lindhofer H. A new class of trifunctional bispecific antibodies mediated efficient immunological purging of peripheral blood stem cells. Eur J Cancer 2001. [DOI: 10.1016/s0959-8049(01)80414-7] [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: 10/27/2022]
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Kern WV, Heiss M, Steinbach G. Prediction of gram-negative bacteremia in patients with cancer and febrile neutropenia by means of interleukin-8 levels in serum: targeting empirical monotherapy versus combination therapy. Clin Infect Dis 2001; 32:832-5. [PMID: 11229856 DOI: 10.1086/319207] [Citation(s) in RCA: 34] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2000] [Revised: 07/18/2000] [Indexed: 11/03/2022] Open
Abstract
In a prospective observational study of 133 neutropenic episodes, interleukin (IL)-8 serum levels > 2000 pg/mL at the onset of fever had a sensitivity of 53% and a specificity of 97% as a predictor of gram-negative bacteremia (GNB; positive predictive value, 73%; negative predictive value, 94%). The rates of early death differed significantly between patients with high and those with low IL-8 levels (3/11 vs. 1/122; P< .01). Serum IL-8 levels at the onset of fever define a low-risk subgroup of patients who can safely be treated with monotherapy.
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Affiliation(s)
- W V Kern
- Department of Medicine, Section of Infectious Diseases and Clinical Immunology, University Hospital and Medical Center, D-89070 Ulm, Germany.
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Huber A, Heuck A, Baur A, Helmberger T, Waggershauser T, Billing A, Heiss M, Petsch R, Reiser M. Dynamic contrast-enhanced MR angiography from the distal aorta to the ankle joint with a step-by-step technique. AJR Am J Roentgenol 2000; 175:1291-8. [PMID: 11044026 DOI: 10.2214/ajr.175.5.1751291] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [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: 11/18/2022]
Abstract
OBJECTIVE The aim of this study was to visualize the arteries from the distal aorta to the ankle joint and to determine the accuracy of MR angiography for detecting stenoses and occlusions. SUBJECTS AND METHODS Twenty-four patients with peripheral arterial occlusive disease underwent digital subtraction angiography and were examined on a 1.5-T MR scanner. The transit time for contrast material was determined with a test bolus injection. A T1-weighted three-dimensional gradient-echo sequence with short TR and TE was used for a dynamic measurement at the level of the iliac arteries, the upper leg, and the lower leg arteries. For each level a single dose of gadolinium was injected into an antecubital vein with an MR power injector. Maximal-intensity-projection reconstructions were calculated after subtraction of the first measurement at each level. Two experienced MR radiologists who were unaware of the digital subtraction angiography results interactively evaluated both the MIP reconstructions and the single slices on a workstation, first independently and then in a consensus interpretation. RESULTS With digital subtraction angiography, 80 hemodynamically significant stenoses and 39 occlusions were detected. For the stenoses and occlusions, a sensitivity of 100% was found for MR angiography. The specificity for the assessment of stenoses and occlusions was 98% and 94%, respectively, for the iliac arteries; 98% and 94%, respectively, for the upper leg arteries; and 94% and 95%, respectively, for the lower leg arteries. Most false-positive findings of occlusion were due to metal stents present in the iliac (n = 3) and upper leg (n = 4) arteries. CONCLUSION The MR imaging technique that we used revealed the arteries from the distal aorta to the ankle and proved to be reliable at showing arterial stenoses and occlusions.
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Affiliation(s)
- A Huber
- Department of Clinical Radiology, Klinikum der LMU, Grobetahadern, Marchioninistr. 15, 81377 München, Germany
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Helmberger T, Heiss M, Bayer B, Billing A, Holzknecht N, Reiser M. [Stenoses and occlusions of the supraaortic vessels--the interdisciplinary interventional treatment of patients with an increased surgical risk]. Radiologe 2000; 40:805-12. [PMID: 11056972 DOI: 10.1007/s001170050827] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
PURPOSE The value of elective PTA in stenoses of the supraaortic vessels and especially of the carotid artery is still under discussion. Stenoses after surgical and/or radiation therapy and a high cardio-vascular risk for a surgical procedure, however, justify minimal-invasive techniques. MATERIAL AND METHODS In 31 patients with 24 symptomatic and 7 asymptomatic stenoses of the supraaortic arteries (3 Acc, 19 Aci, 5 Ascl, 4 Tr.brc, 2 Aax) minimal-invasive angioplasty and stent-placement was performed. The rationale for the interventional procedure was an elevated medical or technical risk of the respective surgical procedure. All procedures were performed using a coaxial technique with a guiding catheter. An open vascular access was necessary in 7 cases due to an unfavorable anatomical situation. RESULTS The technical success rate was 100%. Peri-interventionally, a TIA occurred in 2 patients (1 spontaneous relieve, 1 complete remission after rt-PA lysis therapy). During the mean follow-up period of 13 months 3 patients died due to non-cerebrovascular reasons. In 2 patients a moderate restenosis, in 1 a high-grade stenosis, and in 1 and complete occlusion occurred without symptoms. After one year of follow-up, all treated stenoses were patent with a restenosis rate of 10.7% without further neurological symptoms. CONCLUSION Interventional angioplasty with stent-placement of the supraaortic arteries is a safe and effective alternative in patients are at high risk for classical surgical procedures.
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Affiliation(s)
- T Helmberger
- Institut für Klinische Radiologie, Klinikum der Universität, Grosshadern, München.
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Bangerter M, Griesshammer M, v Tirpitz C, Krauter J, Heil G, Hafner M, Kern W, Heiss M, Kern P. Myelodysplastic syndrome with monosomy 7 after immunosuppressive therapy in Behçet's disease. Scand J Rheumatol 1999; 28:117-9. [PMID: 10229142 DOI: 10.1080/030097499442595] [Citation(s) in RCA: 11] [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: 10/16/2022]
Abstract
Only few cases of Behçet's and hematological malignancies have been reported until now. We recently observed a 39-year-old female patient with Behçet's disease developing a myelodysplastic syndrome (MDS) FAB subtype refractory anemia with excess of blasts in transformation [RAEB-t] with a monosomy 7 after being treated with cyclosporin A and chlorambucil for several years. This case is reported and the occurrence of hematological malignancies and Behçet's disease is reviewed.
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Affiliation(s)
- M Bangerter
- Department of Medicine III, University of Ulm, Germany
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Abstract
The incorporation of dead zones in the error signal of basis function networks avoids the networks' overtraining and guarantees the convergence of the normalized least mean square (LMS) algorithm and related algorithms. A new so-called error-minimizing dead zone is presented providing the least a posteriori error out of the set of all convergence assuring dead zones. A general convergence proof is developed for LMS algorithms with dead zones, and the error-minimizing dead zone is derived from the resulting convergence condition. The performance is compared with the performance of classical dead zones.
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Affiliation(s)
- M Heiss
- Inst. fur Allgemeine Elektrotechnik Automobilelektronik, Tech. Univ. of Vienna
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Weisweiler W, Frenck C, Heiss M. Entwicklung eines quasikontinuierlichen Meßverfahrens zur Bestimmung von Quecksilber in der Luft. CHEM-ING-TECH 1995. [DOI: 10.1002/cite.330670116] [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: 11/09/2022]
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Heiss P, Wilke J, Heiss M. [Therapy and prognosis in 360 laryngeal and hypopharyngeal cancers at the Erfurt ENT clinic 1978-1987]. HNO 1990; 38:125-8. [PMID: 2358381] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We report 316 patients with carcinoma of the larynx and 44 patients with carcinoma of the hypopharynx. The 5-year survival rate for supraglottic carcinoma was 53%, for glottic carcinoma 74%, and for hypopharyngeal carcinoma 18%. The ratio of men to women was 17:1. The risk factors of chronic laryngitis, abuse of nicotine and alcohol are described.
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Affiliation(s)
- P Heiss
- Klinik und Poliklinik für HNO-Erkrankungen, Medizinischen Akademie Erfurt
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Antica M, Heiss M, Kummer U, Munker R, Thiel E, Thierfelder S. Simultaneous demonstration of two antigens on single T cells using antibodies with contrasting labels. J Immunol Methods 1986; 87:129-36. [PMID: 2869087 DOI: 10.1016/0022-1759(86)90521-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
We describe a double labeling method for the discrimination of 2 antigens on single cells. It consists of a combination of 3H-immunoautoradiography and immunocytochemistry applied to cells previously fixed on poly-L-lysine (PLL)-coated multispot slides. The method has been applied to various mouse cells contemporaneously labeled with 2 different monoclonal antibodies. In order to distinguish the attached antibodies unambiguously, they were labeled with contrasting markers. One of the antibodies was marked with tritium blackening the photographic film that covers the slide. The other was detected with the peroxidase-anti-peroxidase (PAP) method forming a reddish precipitate. The contrast between the reddish reaction product of the PAP-labeled antibody and the black silver grains allows cells, specifically labeled with both antibodies, to be distinguished from cells labeled with only one or neither of the antibodies. Tritium-labeled antibodies were introduced because of their advantage over antibodies labeled with iodine in the closer localization of the silver grains to the bound antibody and their much longer halflife (60 days versus 12 years). In this study we applied a tritium-labeled anti-Thy-1.1 together with anti-Lyt-1 monoclonal antibody for studying the distribution of the corresponding antigens on lymphocytes in the mouse thymus and lymph node cells.
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