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Dietzsch S, Braesigk A, Seidel C, Remmele J, Kitzing R, Schlender T, Mynarek M, Geismar D, Jablonska K, Schwarz R, Pazos M, Weber DC, Frick S, Gurtner K, Matuschek C, Harrabi SB, Glück A, Lewitzki V, Dieckmann K, Benesch M, Gerber NU, Obrecht D, Rutkowski S, Timmermann B, Kortmann RD. Types of deviation and review criteria in pretreatment central quality control of tumor bed boost in medulloblastoma-an analysis of the German Radiotherapy Quality Control Panel in the SIOP PNET5 MB trial. Strahlenther Onkol 2021; 198:282-290. [PMID: 34351451 PMCID: PMC8863746 DOI: 10.1007/s00066-021-01822-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 07/02/2021] [Indexed: 12/31/2022]
Abstract
Purpose In Germany, Austria, and Switzerland, pretreatment radiotherapy quality control (RT-QC) for tumor bed boost (TB) in non-metastatic medulloblastoma (MB) was not mandatory but was recommended for patients enrolled in the SIOP PNET5 MB trial between 2014 and 2018. This individual case review (ICR) analysis aimed to evaluate types of deviations in the initial plan proposals and develop uniform review criteria for TB boost. Patients and methods A total of 78 patients were registered in this trial, of whom a subgroup of 65 patients were available for evaluation of the TB treatment plans. Dose uniformity was evaluated according to the definitions of the protocol. Additional RT-QC criteria for standardized review of target contours were elaborated and data evaluated accordingly. Results Of 65 initial TB plan proposals, 27 (41.5%) revealed deviations of target volume delineation. Deviations according to the dose uniformity criteria were present in 14 (21.5%) TB plans. In 25 (38.5%) cases a modification of the RT plan was recommended. Rejection of the TB plans was rather related to unacceptable target volume delineation than to insufficient dose uniformity. Conclusion In this analysis of pretreatment RT-QC, protocol deviations were present in a high proportion of initial TB plan proposals. These findings emphasize the importance of pretreatment RT-QC in clinical trials for MB. Based on these data, a proposal for RT-QC criteria for tumor bed boost in non-metastatic MB was developed. Supplementary Information The online version of this article (10.1007/s00066-021-01822-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Stefan Dietzsch
- Department of Radiation Oncology, University of Leipzig Medical Center, Stephanstr. 9a, 04103, Leipzig, Germany. .,Clinic for Particle Therapy, West German Proton Therapy Centre, University of Essen, Essen, Germany.
| | - Annett Braesigk
- Department of Radiation Oncology, University of Leipzig Medical Center, Stephanstr. 9a, 04103, Leipzig, Germany
| | - Clemens Seidel
- Department of Radiation Oncology, University of Leipzig Medical Center, Stephanstr. 9a, 04103, Leipzig, Germany
| | - Julia Remmele
- Department of Radiation Oncology, University of Leipzig Medical Center, Stephanstr. 9a, 04103, Leipzig, Germany
| | - Ralf Kitzing
- Department of Radiation Oncology, University of Leipzig Medical Center, Stephanstr. 9a, 04103, Leipzig, Germany
| | - Tina Schlender
- Department of Radiation Oncology, University of Leipzig Medical Center, Stephanstr. 9a, 04103, Leipzig, Germany
| | - Martin Mynarek
- Departement of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Dirk Geismar
- Clinic for Particle Therapy, West German Proton Therapy Centre, University of Essen, Essen, Germany
| | - Karolina Jablonska
- Faculty of Medicine, Department of Radiation Oncology, University of Cologne, Cologne, Germany
| | - Rudolf Schwarz
- Department of Radiation Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Montserrat Pazos
- Department of Radiotherapy and Radiation Oncology, Ludwig Maximilian University Munich, Munich, Germany
| | - Damien C Weber
- Center for Protontherapy, Paul Scherrer Institute, Villigen, Switzerland
| | - Silke Frick
- Department of Radiotherapy and Radiation Oncology, Hospital Bremen Mitte, Bremen, Germany
| | - Kristin Gurtner
- Department of Radiotherapy and Radiation Oncology, Faculty of Medicine and University Hospital, Carl Gustav Carus, Technical University Dresden, Dresden, Germany
| | - Christiane Matuschek
- Department of Radiation Oncology, Medical Faculty Heinrich Heine University Duesseldorf, Duesseldorf, Germany
| | - Semi Ben Harrabi
- Department of Radiation Oncology and Radiotherapy, Heidelberg University Hospital, Heidelberg, Germany
| | - Albrecht Glück
- Radiation Oncology, Munich-Schwabing Municipal Hospital, Munich, Germany
| | - Victor Lewitzki
- Department of Radiotherapy, University of Wuerzburg, Wuerzburg, Germany
| | - Karin Dieckmann
- Department of Radiotherapy, Medical University of Vienna, Vienna, Austria
| | - Martin Benesch
- Division of Pediatric Hematology/Oncology, Department of Pediatrics and Adolescent Medicine, Medical University of Graz, Graz, Austria
| | - Nicolas U Gerber
- Department of Oncology, University Children's Hospital, Zurich, Switzerland
| | - Denise Obrecht
- Departement of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Stefan Rutkowski
- Departement of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Beate Timmermann
- Clinic for Particle Therapy, West German Proton Therapy Centre, University of Essen, Essen, Germany
| | - Rolf-Dieter Kortmann
- Department of Radiation Oncology, University of Leipzig Medical Center, Stephanstr. 9a, 04103, Leipzig, Germany
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Dietzsch S, Placzek F, Pietschmann K, von Bueren AO, Matuschek C, Glück A, Guckenberger M, Budach V, Welzel J, Pöttgen C, Schmidberger H, Heinzelmann F, Paulsen F, Pazos M, Schwarz R, Hornung D, Martini C, Grosu AL, Meyer FM, Jablonska K, Dunst J, Kapp KS, Dieckmann K, Timmermann B, Pietsch T, Warmuth-Metz M, Kwiecien R, Benesch M, Gerber NU, Pfister SM, Clifford SC, von Hoff K, Klagges S, Rutkowski S, Kortmann RD, Mynarek M. MBCL-11. TIME TO RADIOTHERAPY IMPACTS SURVIVAL IN PEDIATRIC AND ADOLESCENT NON-METASTATIC MEDULLOBLASTOMA TREATED BY UPFRONT RADIOTHERAPY – A REPORT FROM THE HIT 2000 TRIAL. Neuro Oncol 2020. [PMCID: PMC7715814 DOI: 10.1093/neuonc/noaa222.487] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
PURPOSE To evaluate prognostic factors and impact of participation in a randomized trial in non-metastatic medulloblastoma. METHODS AND PATIENTS 382 patients with non-metastatic medulloblastoma aged 4–21 years with primary neurosurgical resections between 2001 and 2011 were enrolled into the HIT 2000 trial and centrally reviewed. Between 2001 and 2006, 176 of these patients participated in the randomized trial HIT-SIOP PNET 4. Three different radiotherapy protocols were applied. Molecular subgroup was available for 157 patients. RESULTS Median follow-up was 6.35 [0.09–13.86] years. The 5-year progression-free (PFS) and overall survival (OS) rates were 80.3 % ± 2.1 % and 86.5 % ± 1.8 %, respectively. On univariate analysis, there was no difference in PFS and OS according to radiotherapy protocols or in patients who participated in the HIT-SIOP PNET 4 trial or not, while histology, molecular subgroup and postoperative residual tumor influenced PFS significantly. Time interval between surgery and irradiation (≤48 days vs. ≥49 days) failed the significance level (p=0.052). On multivariate analyses, molecular subgroup (WNT activated vs. Group3 HR 5.49; p=0.014) and time interval between surgery and irradiation (HR 2.2; p=0.018) were confirmed as independent risk factors. CONCLUSION Using a centralized review system, multiprofessional and multiinstitutional collaboration as established for pediatric brain tumor patients in Germany, and risk-stratified therapy, outcome for non-metastatic medulloblastoma treated within HIT-SIOP PNET4 could be maintained outside the randomized trial. Prolonged time to radiotherapy negatively influenced survival.
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Affiliation(s)
- Stefan Dietzsch
- Department for Radiation Oncology, University of Leipzig Medical Center, Leipzig, Germany
| | - Felix Placzek
- Department for Radiation Oncology, University of Leipzig Medical Center, Leipzig, Germany
| | - Klaus Pietschmann
- Department of Radiation Oncology, Chemnitz Municipal Hospital, Chemnitz, Germany
- Department for Radiation Oncology, University of Leipzig Medical Center, Leipzig, Germany
| | - André O von Bueren
- Department of Pediatric Hematology and Oncology, University Hospital Geneva, Geneva, Switzerland
| | - Christiane Matuschek
- Department of Radiation Oncology, Medical Faculty, Heinrich Heine University of Düsseldorf, Düsseldorf, Germany
| | - Albrecht Glück
- Radiation Oncology, Munich-Schwabing Municipal Hospital, Munich, Germany
| | - Matthias Guckenberger
- Department of Radiation Oncology, University of Zurich Medical Center, Zurich, Germany
| | - Volker Budach
- Department for Radiation Oncology, Charité School of Medicine and University Hospital Berlin, Berlin, Germany
| | - Jutta Welzel
- Department of Radiation Oncology, Pius Hospital Oldenburg, Oldenburg, Germany
| | - Christoph Pöttgen
- Department of Radiotherapy, West German Cancer Center, University of Duisburg-Essen, Essen, Germany
| | - Heinz Schmidberger
- Department for Radiation Oncology, University of Mainz Medical Center, Mainz, Germany
| | - Frank Heinzelmann
- Department for Radiation Oncology, University of Tuebingen Medical Center, Tuebingen, Germany
| | - Frank Paulsen
- Department for Radiation Oncology, University of Tuebingen Medical Center, Tuebingen, Germany
| | - Montserrat Pazos
- Department of Radiotherapy and Radiation Oncology, Ludwig Maximilian University Munich, Munich, Germany
| | - Rudolf Schwarz
- Department of Radiation Oncology, University Medical Center Eppendorf, Hamburg, Germany
| | - Dagmar Hornung
- Department of Radiation Oncology, University Medical Center Eppendorf, Hamburg, Germany
| | - Carmen Martini
- Department of Radiation Oncology, University Medical Center Freiburg, Freiburg, Germany
| | - Anca Ligia Grosu
- Department of Radiation Oncology, University Medical Center Freiburg, Freiburg, Germany
| | - Frank Michael Meyer
- Radiation Oncology, MVZ medical care center, Hospital Augsburg, Augsburg, Germany
| | - Karolina Jablonska
- Department of Radiation Oncology, University Medical Center Cologne, Cologne, Germany
| | - Juergen Dunst
- Department of Radiation Oncology, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Karin S Kapp
- Department of Therapeutic Radiology and Oncology, Medical University of Graz, Graz, Austria
| | - Karin Dieckmann
- Department of Radiotherapy, Medical University of Vienna, Vienna, Austria
| | - Beate Timmermann
- Clinic for Particle Therapy, West German Proton Therapy Centre, University of Essen, Essen, Germany
| | - Torsten Pietsch
- Department of Neuropathology, University of Bonn, Bonn, Germany
| | | | - Robert Kwiecien
- Institute of Biometry and Clinical Research, University of Muenster, Muenster, Germany
| | - Martin Benesch
- Division of Pediatric Hematology/Oncology, Department of Pediatrics and Adolescent Medicine, Medical University of Graz, Graz, Austria
| | | | - Stefan M Pfister
- Hopp Children′s Cancer Center Heidelberg (KiTZ), Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Department of Pediatric Oncology, Hematology and Immunology, Heidelberg University Hospital, Heidelberg, Germany
| | - Steven C Clifford
- Wolfson Childhood Cancer Research Centre, Newcastle University Centre for Cancer, Newcastle upon Tyne, United Kingdom
| | - Katja von Hoff
- Department of Paediatric Oncology and Hematology, Charité University Medicine Berlin, Berlin, Germany
| | - Sabine Klagges
- Department for Radiation Oncology, University of Leipzig Medical Center, Leipzig, Germany
| | - Stefan Rutkowski
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Rolf-Dieter Kortmann
- Department for Radiation Oncology, University of Leipzig Medical Center, Leipzig, Germany
| | - Martin Mynarek
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Dietzsch S, Braesigk A, Seidel C, Remmele J, Kitzing R, Schlender T, Mynarek M, Geismar D, Jablonska K, Schwarz R, Pazos M, Walser M, Frick S, Gurtner K, Matuschek C, Harrabi SB, Glück A, Lewitzki V, Dieckmann K, Benesch M, Gerber NU, Rutkowski S, Timmermann B, Kortmann RD. Pretreatment central quality control for craniospinal irradiation in non-metastatic medulloblastoma : First experiences of the German radiotherapy quality control panel in the SIOP PNET5 MB trial. Strahlenther Onkol 2020; 197:674-682. [PMID: 33226469 PMCID: PMC8292275 DOI: 10.1007/s00066-020-01707-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [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: 06/24/2020] [Accepted: 10/23/2020] [Indexed: 12/13/2022]
Abstract
Purpose Several studies have demonstrated the negative impact of radiotherapy protocol deviations on tumor control in medulloblastoma. In the SIOP PNET5 MB trial, a pretreatment radiotherapy quality control (RT-QC) program was introduced. A first analysis for patients enrolled in Germany, Switzerland and Austria with focus on types of deviations in the initial plan proposals and review criteria for modern radiation technologies was performed. Methods and patients Sixty-nine craniospinal irradiation (CSI) plans were available for detailed analyses. RT-QC was performed according to protocol definitions on dose uniformity. Because of the lack of definitions for high-precision 3D conformal radiotherapy within the protocol, additional criteria for RT-QC on delineation and coverage of clinical target volume (CTV) and planning target volume (PTV) were defined and evaluated. Results Target volume (CTV/PTV) deviations occurred in 49.3% of initial CSI plan proposals (33.3% minor, 15.9% major). Dose uniformity deviations were less frequent (43.5%). Modification of the RT plan was recommended in 43.5% of CSI plans. Unacceptable RT plans were predominantly related to incorrect target delineation rather than dose uniformity. Unacceptable plans were negatively correlated to the number of enrolled patients per institution with a cutoff of 5 patients (p = 0.001). Conclusion This prospective pretreatment individual case review study revealed a high rate of deviations and emphasizes the strong need of pretreatment RT-QC in clinical trials for medulloblastoma. Furthermore, the experiences point out the necessity of new RT-QC criteria for high-precision CSI techniques. Electronic supplementary material The online version of this article (10.1007/s00066-020-01707-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Stefan Dietzsch
- Department for Radiation Oncology, University of Leipzig Medical Center, Stephanstr. 9a, 04103, Leipzig, Germany.
| | - Annett Braesigk
- Department for Radiation Oncology, University of Leipzig Medical Center, Stephanstr. 9a, 04103, Leipzig, Germany
| | - Clemens Seidel
- Department for Radiation Oncology, University of Leipzig Medical Center, Stephanstr. 9a, 04103, Leipzig, Germany
| | - Julia Remmele
- Department for Radiation Oncology, University of Leipzig Medical Center, Stephanstr. 9a, 04103, Leipzig, Germany
| | - Ralf Kitzing
- Department for Radiation Oncology, University of Leipzig Medical Center, Stephanstr. 9a, 04103, Leipzig, Germany
| | - Tina Schlender
- Department for Radiation Oncology, University of Leipzig Medical Center, Stephanstr. 9a, 04103, Leipzig, Germany
| | - Martin Mynarek
- Departement of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Dirk Geismar
- Clinic for Particle Therapy, West German Proton Therapy Centre, University of Essen, Essen, Germany
| | - Karolina Jablonska
- Faculty of Medicine, Department of Radiation Oncology, University of Cologne, Cologne, Germany
| | - Rudolf Schwarz
- Department of Radiation Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Montserrat Pazos
- Department of Radiotherapy and Radiation Oncology, Ludwig Maximilian University Munich, Munich, Germany
| | - Marc Walser
- Center for Protontherapy, Paul Scherrer Institute, Villigen, Switzerland
| | - Silke Frick
- Department of Radiotherapy and Radiation Oncology, Hospital Bremen Mitte, Bremen, Germany
| | - Kristin Gurtner
- Department of Radiotherapy and Radiation Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technical University Dresden, Dresden, Germany
| | - Christiane Matuschek
- Department of Radiation Oncology, Medical Faculty Heinrich Heine University Duesseldorf, Duesseldorf, Germany
| | - Semi Ben Harrabi
- Department of Radiation Oncology and Radiotherapy, Heidelberg University Hospital, Heidelberg, Germany
| | - Albrecht Glück
- Radiation Oncology, Munich-Schwabing Municipal Hospital, Munich, Germany
| | - Victor Lewitzki
- Department of Radiotherapy, University of Wuerzburg, Wuerzburg, Germany
| | - Karin Dieckmann
- Department of Radiotherapy, Medical University of Vienna, Vienna, Austria
| | - Martin Benesch
- Division of Pediatric Hematology/Oncology, Department of Pediatrics and Adolescent Medicine, Medical University of Graz, Graz, Austria
| | | | - Stefan Rutkowski
- Departement of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Beate Timmermann
- Clinic for Particle Therapy, West German Proton Therapy Centre, University of Essen, Essen, Germany
| | - Rolf-Dieter Kortmann
- Department for Radiation Oncology, University of Leipzig Medical Center, Stephanstr. 9a, 04103, Leipzig, Germany
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Dietzsch S, Placzek F, Pietschmann K, von Bueren AO, Matuschek C, Glück A, Guckenberger M, Budach V, Welzel J, Pöttgen C, Schmidberger H, Heinzelmann F, Paulsen F, Escudero MP, Schwarz R, Hornung D, Martini C, Grosu AL, Stueben G, Jablonska K, Dunst J, Stranzl-Lawatsch H, Dieckmann K, Timmermann B, Pietsch T, Warmuth-Metz M, Bison B, Kwiecien R, Benesch M, Gerber NU, Grotzer MA, Pfister SM, Clifford SC, von Hoff K, Klagges S, Rutkowski S, Kortmann RD, Mynarek M. Evaluation of Prognostic Factors and Role of Participation in a Randomized Trial or a Prospective Registry in Pediatric and Adolescent Nonmetastatic Medulloblastoma - A Report From the HIT 2000 Trial. Adv Radiat Oncol 2020; 5:1158-1169. [PMID: 33305077 PMCID: PMC7718550 DOI: 10.1016/j.adro.2020.09.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/11/2020] [Accepted: 09/17/2020] [Indexed: 12/01/2022] Open
Abstract
Purpose We aimed to compare treatment results in and outside of a randomized trial and to confirm factors influencing outcome in a large retrospective cohort of nonmetastatic medulloblastoma treated in Austria, Switzerland and Germany. Methods and Materials Patients with nonmetastatic medulloblastoma (n = 382) aged 4 to 21 years and primary neurosurgical resection between 2001 and 2011 were assessed. Between 2001 and 2006, 176 of these patients (46.1%) were included in the randomized HIT SIOP PNET 4 trial. From 2001 to 2011 an additional 206 patients were registered to the HIT 2000 study center and underwent the identical central review program. Three different radiation therapy protocols were applied. Genetically defined tumor entity (former molecular subgroup) was available for 157 patients. Results Median follow-up time was 7.3 (range, 0.09-13.86) years. There was no difference between HIT SIOP PNET 4 trial patients and observational patients outside the randomized trial, with 7 years progression-free survival rates (PFS) of 79.5% ± 3.1% versus 78.7% ± 3.1% (P = .62). On univariate analysis, the time interval between surgery and irradiation (≤ 48 days vs ≥ 49 days) showed a strong trend to affect PFS (80.4% ± 2.2% vs 64.6% ± 9.1%; P = .052). Furthermore, histologically and genetically defined tumor entities and the extent of postoperative residual tumor influenced PFS. On multivariate analyses, a genetically defined tumor entity wingless-related integration site-activated vs non-wingless-related integration site/non-SHH, group 3 hazard ratio, 5.49; P = .014) and time interval between surgery and irradiation (hazard ratio, 2.2; P = .018) were confirmed as independent risk factors. Conclusions Using a centralized review program and risk-stratified therapy for all patients registered to the study center, outcome was identical for patients with nonmetastatic medulloblastoma treated on and off the randomized HIT SIOP PNET 4 trial. The prognostic values of prolonged time to RT and genetically defined tumor entity were confirmed.
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Affiliation(s)
- Stefan Dietzsch
- Department for Radiation Oncology, University of Leipzig Medical Center, Leipzig, Germany
| | - Felix Placzek
- Department for Radiation Oncology, University of Leipzig Medical Center, Leipzig, Germany
| | - Klaus Pietschmann
- Department for Radiation Oncology, University of Leipzig Medical Center, Leipzig, Germany
- Department of Radiation Oncology, Chemnitz Municipal Hospital, Chemnitz, Germany
| | - André O. von Bueren
- Department of Pediatrics, Obstetrics and Gynecology, Division of Pediatric Hematology and Oncology, University Hospital Geneva, CANSEARCH Research Laboratory, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Christiane Matuschek
- Department of Radiation Oncology, Medical Faculty, Heinrich Heine University of Düsseldorf, Düsseldorf, Germany
| | - Albrecht Glück
- Radiation Oncology, Munich-Schwabing Municipal Hospital, Munich, Germany
| | - Matthias Guckenberger
- Department of Radiation Oncology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Volker Budach
- Department for Radiation Oncology, Charité School of Medicine and University Hospital Berlin, Berlin, Germany
| | - Jutta Welzel
- Department of Radiation Oncology, Pius Hospital Oldenburg, Oldenburg, Germany
| | - Christoph Pöttgen
- Department of Radiotherapy, West German Cancer Center, University of Duisburg-Essen, Essen, Germany
| | - Heinz Schmidberger
- Department for Radiation Oncology, University of Mainz Medical Center, Mainz, Germany
| | - Frank Heinzelmann
- Department for Radiation Oncology, University of Tuebingen Medical Center, Tuebingen, Germany
| | - Frank Paulsen
- Department for Radiation Oncology, University of Tuebingen Medical Center, Tuebingen, Germany
| | - Montserrat Pazos Escudero
- Department of Radiotherapy and Radiation Oncology, Ludwig Maximilian University Munich, Munich, Germany
| | - Rudolf Schwarz
- Department of Radiation Oncology, University Medical Center Eppendorf, Hamburg, Germany
| | - Dagmar Hornung
- Department of Radiation Oncology, University Medical Center Eppendorf, Hamburg, Germany
| | - Carmen Martini
- Department of Radiation Oncology, University Medical Center Freiburg, Freiburg, Germany
| | - Anca Ligia Grosu
- Department of Radiation Oncology, University Medical Center Freiburg, Freiburg, Germany
| | - Georg Stueben
- Department of Radiation Oncology, University Medical Center Augsburg, Augsburg, Germany
| | - Karolina Jablonska
- Department of Radiation Oncology, University Medical Center Cologne, Cologne, Germany
| | - Juergen Dunst
- Department of Radiation Oncology, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Heidi Stranzl-Lawatsch
- Department of Therapeutic Radiology and Oncology, Medical University of Graz, Graz, Austria
| | - Karin Dieckmann
- Department of Radiotherapy, Medical University of Vienna, Vienna, Austria
| | - Beate Timmermann
- Clinic for Particle Therapy, West German Proton Therapy Centre, University of Essen, Essen, Germany
| | - Torsten Pietsch
- Department of Neuropathology, DGNN Brain Tumor Reference Center, University of Bonn, Bonn, Germany
| | - Monika Warmuth-Metz
- Institute of Diagnostic and Interventional Neuroradiology, University Hospital of Wuerzburg, Wuerzburg, Germany
| | - Brigitte Bison
- Institute of Diagnostic and Interventional Neuroradiology, University Hospital of Wuerzburg, Wuerzburg, Germany
| | - Robert Kwiecien
- Institute of Biometry and Clinical Research, University of Muenster, Muenster, Germany
| | - Martin Benesch
- Division of Pediatric Hematology/Oncology, Department of Pediatrics and Adolescent Medicine, Medical University of Graz, Graz, Austria
| | | | | | - Stefan M. Pfister
- Hopp Children's Cancer Center Heidelberg (KiTZ), Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Department of Pediatric Oncology, Hematology and Immunology, Heidelberg University Hospital, Heidelberg, Germany
| | - Steven C. Clifford
- Wolfson Childhood Cancer Research Centre, Newcastle University Centre for Cancer, Newcastle upon Tyne, United Kingdom
| | - Katja von Hoff
- Department of Pediatric Oncology and Hematology, Charité University Medicine Berlin, Berlin, Germany
| | - Sabine Klagges
- Department for Radiation Oncology, University of Leipzig Medical Center, Leipzig, Germany
| | - Stefan Rutkowski
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Rolf-Dieter Kortmann
- Department for Radiation Oncology, University of Leipzig Medical Center, Leipzig, Germany
- Corresponding author: Rolf-Dieter Kortmann, MD
| | - Martin Mynarek
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Haemmig S, Baumgartner U, Glück A, Zbinden S, Tschan MP, Kappeler A, Mariani L, Vajtai I, Vassella E. miR-125b controls apoptosis and temozolomide resistance by targeting TNFAIP3 and NKIRAS2 in glioblastomas. Cell Death Dis 2014; 5:e1279. [PMID: 24901050 PMCID: PMC4611719 DOI: 10.1038/cddis.2014.245] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [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: 03/11/2014] [Revised: 03/28/2014] [Accepted: 04/29/2014] [Indexed: 11/11/2022]
Abstract
Diffusely infiltrating gliomas are among the most prognostically discouraging neoplasia in human. Temozolomide (TMZ) in combination with radiotherapy is currently used for the treatment of glioblastoma (GBM) patients, but less than half of the patients respond to therapy and chemoresistance develops rapidly. Epigenetic silencing of the O6-methylguanine-DNA methyltransferase (MGMT) has been associated with longer survival in GBM patients treated with TMZ, but nuclear factor κB (NF-κB)-mediated survival signaling and TP53 mutations contribute significantly to TMZ resistance. Enhanced NF-κB is in part owing to downregulation of negative regulators of NF-κB activity, including Tumor necrosis factor alpha-induced protein 3 (TNFAIP3) and NF-κB inhibitor interacting RAS-like 2 (NKIRAS2). Here we provide a novel mechanism independent of TP53 and MGMT by which oncogenic miR-125b confers TMZ resistance by targeting TNFAIP3 and NKIRAS2. GBM cells overexpressing miR-125b showed increased NF-κB activity and upregulation of anti-apoptotic and cell cycle genes. This was significantly associated with resistance of GBM cells to TNFα- and TNF-related inducing ligand-induced apoptosis as well as resistance to TMZ. Conversely, overexpression of anti-miR-125b resulted in cell cycle arrest, increased apoptosis and increased sensitivity to TMZ, indicating that endogenous miR-125b is sufficient to control these processes. GBM cells overexpressing TNFAIP3 and NKIRAS2 were refractory to miR-125b-induced apoptosis resistance as well as TMZ resistance, indicating that both genes are relevant targets of miR-125b. In GBM tissues, high miR-125b expression was significantly correlated with nuclear NF-κB confirming that miR-125b is implicated in NF-κB signaling. Most remarkably, miR-125b overexpression was clearly associated with shorter overall survival of patients treated with TMZ, suggesting that this microRNA is an important predictor of response to therapy.
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Affiliation(s)
- S Haemmig
- Institut für Pathologie, University of Bern, Bern, Switzerland
| | - U Baumgartner
- Institut für Pathologie, University of Bern, Bern, Switzerland
| | - A Glück
- Institut für Pathologie, University of Bern, Bern, Switzerland
| | - S Zbinden
- Institut für Pathologie, University of Bern, Bern, Switzerland
| | - M P Tschan
- Institut für Pathologie, University of Bern, Bern, Switzerland
| | - A Kappeler
- Institut für Pathologie, University of Bern, Bern, Switzerland
| | - L Mariani
- Klinik und Poliklinik, University Hospital Basel, Basel, Switzerland
| | - I Vajtai
- Institut für Pathologie, University of Bern, Bern, Switzerland
| | - E Vassella
- Institut für Pathologie, University of Bern, Bern, Switzerland
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Müller K, Schlamann A, Guckenberger M, Warmuth-Metz M, Glück A, Pietschmann S, Wawer A, Kortmann RD, Kramm C, von Bueren A. Craniospinal irradiation with concurrent temozolomide for primary metastatic pediatric high-grade or diffuse intrinsic pontine gliomas. Strahlenther Onkol 2014; 190:377-81. [DOI: 10.1007/s00066-013-0513-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Accepted: 11/08/2013] [Indexed: 11/27/2022]
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7
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Neisser A, Alt K, Stern C, Scholtz W, Grünfeld A, Michaelis L, Volk R, Lipschütz B, Glück A, Friedlaender M, Citron H, Königstein H, Blumenfeld A, Salmon P, Saalfeld E, Ledermann R, Joseph M, Siebert C, Juliusberg F. Die Behandlung der Syphilis mit dem Ehrlichschen Präparat 606. Dtsch Med Wochenschr 2009. [DOI: 10.1055/s-0028-1143111] [Citation(s) in RCA: 2] [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: 10/20/2022]
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8
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9
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Mathies H, Glück A, Poulantzas J, Schmidt D. Blockierung der Hyaluronidasehemmung durch Ergotamintartrat. Pharmacology 2008. [DOI: 10.1159/000134764] [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: 11/19/2022]
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10
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Koziczak-Holbro M, Joyce C, Glück A, Kinzel B, Müller M, Gram H. Solving the IRAK-4 enigma: application of kinase-dead knock-in mice. Ernst Schering Found Symp Proc 2007:63-82. [PMID: 18510099] [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: 05/26/2023]
Abstract
Interleukin-1 receptor-associated kinase (IRAK-4) is an essential component of the signal transduction complex downstream of the interleukin (IL)-1- and Toll-like receptors. Though regarded as the first kinase in the signaling cascade, the role of IRAK-4 kinase activity versus its scaffold function has been controversial. In order to investigate the role of IRAK-4 kinase function in vivo, we generated "knock-in" mice where the wild-type IRAK-4 gene is replaced with a mutant gene encoding kinase-deficient IRAK-4 protein (IRAK-4 KD). IRAK-4 kinase is rendered inactive by mutating the conserved lysine residues in the ATP pocket essential for coordinating ATP. Analyses of embryonic fibroblasts and macrophages obtained from IRAK-4 KD mice demonstrated lack of cellular responsiveness to stimulation with IL-1beta or Toll-like receptor 4 (TLR4) and TLR7 agonists. IRAK-4 KD cells were severely impaired in NF-kappaB, JNK, and p38 activation in response to IL-1beta or TLR7 ligand. In addition, activation of JNK and p38 was affected in lipopolysaccharide (LPS)-stimulated IRAK-4 KD macrophages. As a consequence, IL-1 receptor/TLR4/TLR7-mediated production of cytokines and chemokines was largely absent in these cells. Additionally, microarray analysis identified IL-1beta response genes and revealed that the induction of IL-1beta-responsive mRNAs is largely ablated in IRAK-4 KD cells. In summary, our results suggest that IRAK-4 kinase activity plays a critical role in IL-1R-, TLR4-, and TLR7-mediated induction of inflammatory responses.
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Affiliation(s)
- M Koziczak-Holbro
- Novartis Institutes for BioMedical Research, Postfach 4002, Basel, Switzerland.
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11
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Abstract
A case of an aneurysmal portosystemic venous shunt detected by colour Doppler ultrasound (CDUS) is presented. A young female patient complained of postprandial fatigue and had paroxysmal tachycardia. A direct vascular communication between right portal vein and right hepatic vein was found at CDUS and confirmed by direct portal angiogram. Using detachable coils a complete occlusion of the intrahepatic shunt was obtained. Reports from the literature regarding portovenous aneurysms are reviewed.
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Affiliation(s)
- G Bodner
- Abteilung für Radiodiagnostik, Universitätsklinik Innsbruck
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12
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Glück A, Wool IG. Dependence of depurination of oligoribonucleotides by ricin A-chain on divalent cations and chelating agents. Biochem Mol Biol Int 1996; 39:285-91. [PMID: 8799455 DOI: 10.1080/15216549600201301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Ricin A-chain is a cytotoxic RNA N-glycosidase that inactivates eukaryotic ribosomes by depurinating the adenosine at position 4324 in 28S rRNA. The enzyme retains its specificity when a synthetic oligoribonucleotide (a 35-mer) that mimics the structure at the site of action is the substrate. However, covalent modification by ricin A-chain of the oligoribonucleotide but not of ribosomes, depends on the simultaneous presence of a divalent cation and a chelating agent.
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Affiliation(s)
- A Glück
- Department of Biochemistry and Molecular Biology, University of Chicago, IL 60637, USA
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13
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Glück A, Wool IG. Determination of the 28 S ribosomal RNA identity element (G4319) for alpha-sarcin and the relationship of recognition to the selection of the catalytic site. J Mol Biol 1996; 256:838-48. [PMID: 8601835 DOI: 10.1006/jmbi.1996.0130] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.8] [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] [Indexed: 01/31/2023]
Abstract
Ricin A-chin and alpha-sarcin are ribotoxins that inactivate eukaryotic ribosomes by modifying 28 S rRNA; ricin A-chain is an RNA N-glycosidase that depurinates the adenosine at position 4324 and alpha-sarcin is a ribonuclease that cleaves the phosphodiester bond on the 3' side of the adjacent guanosine (at position 4325). In cartoons of the secondary structure these two residues are seen to be embedded in a 17 base single-stranded loop over a seven base-pair helix. However, NMR spectroscopy of an oligoribonucleotide, a 29-mer that mimics the sarcin/ricin domain, indicates that the RNA has a compact conformation in which the guanosine at the position analogous to 4319 in 28 S rRNA is bulged out of what otherwise is an extended A-form helix. Since similar structural irregularities are used by proteins to bind to RNA, we have tested the effect of mutations of the bulged guanosine on recognition and covalent modification of the RNA by ricin A-chain and by alpha-sacrin. For the test a synthetic oligoribonucletide, a 35-mer, was used; the mutations were the deletion, the transition to adenosine, and the transversion to cytidine and uridine of the guanosine that is the analog of G4319. Each of the four mutations abolished cleavage og the RNA by alpha-sacrin, where depurination by ricin A-chain was little affected. Thus G4319 is an identity element for alpha-sacrin recognition. Analysis of the effect of alpha-sacrin on variant oligoribonucleotides in which additional bases were inserted between the identity element guanosine and the site of catalysis suggest that on binding to the RNA the toxin uses the guanosine for orientation and then cleaves at a fixed distance and at a fixed position in space.
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Affiliation(s)
- A Glück
- Department of Biochemistry and Molecular Biology The Univerisity of Chicago, Chicago, IL 60637, USA
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14
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Abstract
Mammalian (rat) ribosomes have 80 proteins; the sequence of amino acids in 75 have been determined. What has been learned of the structure of the rat ribosomal proteins is reviewed with particular attention to their evolution and to amino acid sequence motifs. The latter include: clusters of basic or acidic residues; sequence repeats or shared sequences; zinc finger domains; bZIP elements; and nuclear localization signals. The occurrence and the possible significance of phosphorylated residues and of ubiquitin extensions is noted. The characteristics of the mRNAs that encode the proteins are summarized. The relationship of the rat ribosomal proteins to the proteins in ribosomes from humans, yeast, archaebacteria, and Escherichia coli is collated.
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Affiliation(s)
- I G Wool
- Department of Biochemistry and Molecular Biology, University of Chicago, IL 60637, USA
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15
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Chan YL, Olvera J, Glück A, Wool IG. A leucine zipper-like motif and a basic region-leucine zipper-like element in rat ribosomal protein L13a. Identification of the tum- transplantation antigen P198. J Biol Chem 1994; 269:5589-94. [PMID: 8119894] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The amino acid sequence of the rat 60 S ribosomal subunit protein L13a was deduced from the sequence of nucleotides in two recombinant cDNAs. Mature ribosomal protein L13a has 202 amino acids (the NH2-terminal methionine is removed after translation of the mRNA) and a M(r) of 23,330. Hybridization of the L13a cDNA to digests of nuclear DNA suggests that there are 9-11 copies of the L13a gene. The mRNA for the protein is approximately 800 nucleotides in length. Rat L13a is related to the Saccharomyces cerevisiae ribosomal proteins that have been provisionally designated rp22 and rp23 and to the eubacterial and archaebacterial family of L13 ribosomal proteins. The mouse tum- transplantation antigen P198 is a mutant of the mouse homolog of rat ribosomal protein L13a. Rat ribosomal protein L7 has, at its NH2 terminus, five tandem repeats of a similar sequence of 12 amino acids (Lin, A., Chan, Y. L., McNally, J., Peleg, D., Meyuhas, O., and Wool, I. G. (1987) J. Biol. Chem. 262, 12665-12671); L13a has, in its carboxyl-terminal region, amino acid sequences with significant identity to L7 repeats 1, 3, and 5. L13a also has a number of short amino acid sequences that are repeated, a leucine zipper-like motif at its NH2 terminus, and a potential basic region-leucine zipper element in its carboxyl-terminal region.
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Affiliation(s)
- Y L Chan
- Department of Biochemistry and Molecular Biology, University of Chicago, Illinois 60637
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16
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Glück A, Endo Y, Wool IG. The ribosomal RNA identity elements for ricin and for alpha-sarcin: mutations in the putative CG pair that closes a GAGA tetraloop. Nucleic Acids Res 1994; 22:321-4. [PMID: 8127668 PMCID: PMC523583 DOI: 10.1093/nar/22.3.321] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.6] [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] [Indexed: 01/28/2023] Open
Abstract
alpha-Sarcin is a ribonuclease that cleaves the phosphodiester bond on the 3' side of G4325 in 28S rRNA; ricin A-chain is a RNA N-glycosidase that depurinates the 5' adjacent A4324. These single covalent modifications inactivate the ribosome. An oligoribonucleotide that reproduces the structure of the sarcin/ricin domain in 28S rRNA was synthesized and mutations were constructed in the 5' C and the 3' G that surround a GAGA tetrad that has the sites of toxin action. Covalent modification of the RNA by ricin, but not by alpha-sarcin, requires a Watson-Crick pair to shut off a putative GAGA tetraloop. Either the recognition elements for the two toxins are different despite their catalyzing covalent modification of adjacent nucleotides in 28S rRNA or there are transitions in the conformation of the alpha-sarcin/ricin domain in 28S rRNA and one conformer is recognized by alpha-sarcin and the other by ricin A-chain.
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Affiliation(s)
- A Glück
- Department of Biochemistry and Molecular Biology, University of Chicago, IL 60637
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17
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Chan Y, Olvera J, Glück A, Wool I. A leucine zipper-like motif and a basic region-leucine zipper-like element in rat ribosomal protein L13a. Identification of the tum- transplantation antigen P198. J Biol Chem 1994. [DOI: 10.1016/s0021-9258(17)37502-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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18
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Abstract
Ricin is a cytotoxic protein that inactivates ribosomes by hydrolyzing the N-glycosidic bond between the base and the ribose of the adenosine at position 4324 in eukaryotic 28 S rRNA. Ricin A-chain will also catalyze depurination in naked prokaryotic 16 S rRNA; the adenosine is at position 1014 in a GAGA tetraloop. The rRNA identity elements for recognition by ricin A-chain and for the catalysis of cleavage were examined using synthetic GAGA tetraloop oligoribonucleotides. The RNA designated wild-type, an oligoribonucleotide (19-mer) that approximates the structure of the ricin-sensitive site in 16 S rRNA, and a number of mutants were transcribed in vitro from synthetic DNA templates with phage T7 RNA polymerase. With the wild-type tetraloop oligoribonucleotide the ricin A-chain-catalyzed reaction has a Km of 5.7 microM and a Kcat of 0.01 min-1. The toxin alpha-sarcin, which cleaves the phosphodiester bond on the 3' side of G4325 in 28 S rRNA, does not recognize the tetraloop RNA, although alpha-sarcin does affect a larger synthetic oligoribonucleotide that has a 17-nucleotide loop with a GAGA sequence; thus, there is a clear divergence in the identity elements for the two toxins. Mutants were constructed with all of the possible transitions and transversions of each nucleotide in the GAGA tetraloop; none was recognized by ricin A-chain. Thus, there is an absolute requirement for the integrity of the GAGA sequence in the tetraloop. The helical stem of the tetraloop oligoribonucleotide can be reduced to three base-pairs, indeed, to two base-pairs if the temperature is decreased, without affecting recognition; the nature of these base-pairs does not influence recognition or catalysis by ricin A-chain. If the tetraloop is opened so as to form a GAGA-containing hexaloop, recognition by ricin A-chain is lost. This suggests that during the elongation cycle, a GAGA tetraloop either exists or is formed in the putative 17-member single-stranded region of the ricin domain in 28 S rRNA and this bears on the mechanism of protein synthesis.
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MESH Headings
- Base Sequence
- Endoribonucleases
- Escherichia coli
- Fungal Proteins/pharmacology
- Kinetics
- Molecular Sequence Data
- Nucleic Acid Conformation
- Oligonucleotides/metabolism
- RNA, Bacterial/metabolism
- RNA, Bacterial/ultrastructure
- RNA, Ribosomal, 16S/metabolism
- RNA, Ribosomal, 16S/ultrastructure
- RNA, Ribosomal, 28S/metabolism
- RNA, Ribosomal, 28S/ultrastructure
- Ricin/metabolism
- Structure-Activity Relationship
- Substrate Specificity
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Affiliation(s)
- A Glück
- Department of Biochemistry and Molecular Biology, University of Chicago, IL 60637
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19
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Abstract
The ribotoxins alpha-sarcin and ricin catalyse covalent modifications in adjacent nucleotides in 28S rRNA, yet the elements of nucleic acid structure that they recognize are not only different but incompatible. This suggests that this ribosomal domain (which in two dimensions is a seven-base-pair helical stem and a 17-member single-stranded loop) has alternate conformers. Since the domain is involved in binding of aminoacyl-tRNA and GTP hydrolysis, we propose that the switch between the two configurations, perhaps initiated by the binding of elongation factors, plays a role in translocation.
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Affiliation(s)
- I G Wool
- Department of Biochemistry and Molecular Biology, University of Chicago, IL 60637
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20
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Abstract
Ricin is a cytotoxic protein that inactivates ribosomes by hydrolyzing the N-glycosidic bond between the base and the ribose at position A4324 in eukaryotic 28 S rRNA. The requirements for the recognition by ricin A-chain of this nucleotide and for the catalysis of cleavage were examined using a synthetic oligoribonucleotide that reproduces the sequence and the secondary structure of the RNA domain (a helical stem, a bulged nucleotide, and a 17-member single-stranded loop). The wild-type RNA (35mer) and a number of mutants were transcribed in vitro from synthetic DNA templates with phage T7 RNA polymerase. With the wild-type oligoribonucleotide the ricin A-chain catalyzed reaction has a Km of 13.55 microM and a Kcat of 0.023 min-1. Recognition and catalysis by ricin A-chain has an absolute requirement for A at the position that corresponds to 4324. The helical stem is also essential; however, the number of base-pairs can be reduced from the seven found in 28 S rRNA to three without loss of identity. The nature of these base-pairs can affect catalysis. A change of the second set from one canonical (G.C) to another (U.A) reduces sensitivity to ricin A-chain; whereas, a change of the third pair (U.A----G.C) produces supersensitivity. The bulged nucleotide does not contribute to identification. Hydrolysis is affected by altering the nucleotides in the universal sequence surrounding A4324 or by changing the position in the loop of the tetranucleotide GA(ricin)GA: all of these mutants have a null phenotype. If ribosomes are treated first with alpha-sarcin to cleave the phosphodiester bond at G4325 ricin can still catalyze depurination at A4324. This implies that cleavage by alpha-sarcin at the center of what has been presumed to be a 17 nucleotide single-stranded loop in 28 S rRNA produces ends that are constrained in some way. On the other hand, hydrolysis by alpha-sarcin of the corresponding position in the synthetic oligoribonucleotide prevents recognition by ricin A-chain. The results suggest that the loop has a complex structure, affected by ribosomal proteins, and this bears on the function in protein synthesis of the alpha-sarcin/ricin rRNA domain.
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Affiliation(s)
- Y Endo
- Department of Biochemistry, Yamanashi Medical College, Japan
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21
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Wool IG, Chan YL, Glück A, Suzuki K. The primary structure of rat ribosomal proteins P0, P1, and P2 and a proposal for a uniform nomenclature for mammalian and yeast ribosomal proteins. Biochimie 1991; 73:861-70. [PMID: 1742361 DOI: 10.1016/0300-9084(91)90127-m] [Citation(s) in RCA: 101] [Impact Index Per Article: 3.1] [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] [Indexed: 12/28/2022]
Abstract
The covalent structures of rat ribosomal proteins P0, P1, and P2 were deduced from the sequences of nucleotides in recombinant cDNAs. P0 contains 316 amino acids and has a molecular weight of 34,178; P1 has 114 residues and a molecular weight of 11,490: and P2 has 115 amino acids and a molecular weight of 11,684. The rat P-proteins have a near identical (16 of 17 residues) sequence of amino acids at their carboxyl termini and are related to analogous proteins in other eukaryotic species. A proposal is made for a uniform nomenclature for rat and yeast ribosomal proteins.
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Affiliation(s)
- I G Wool
- Department of Biochemistry and Molecular Biology, University of Chicago, IL 60637
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22
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Endo Y, Glück A, Chan YL, Tsurugi K, Wool IG. RNA-protein interaction. An analysis with RNA oligonucleotides of the recognition by alpha-sarcin of a ribosomal domain critical for function. J Biol Chem 1990; 265:2216-22. [PMID: 2298746] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
alpha-Sarcin is a cytotoxic protein that inactivates ribosomes by hydrolyzing a single phosphodiester bond on the 3' side of G-4325 in eukaryotic 28 S rRNA. We have examined the requirements for the recognition by alpha-sarcin of this domain using a synthetic oligoribonucleotide (35-mer) that reproduces the sequence and, we presume, the secondary structure (a stem, a bulged nucleotide, and a loop) at the site of modification. The wild type structure and a large number of variants were transcribed in vitro from synthetic DNA templates with phage T7 RNA polymerase. Recognition of the substrate is strongly favored by a G at the position that corresponds to 4325. There is an absolute requirement for a helical stem; however, it can be reduced from the 7 base pairs in the natural structure to 3 without loss of specificity. The nature of the base pairs in the stem modifies but does not abolish recognition; whereas, the bulged nucleotide does not contribute to identification. Cleavage is materially affected by altering the nucleotides in the universal sequence surrounding G-4325 and changing the position in the loop of the tetranucleotide GAG(sarcin)A leads to loss of recognition by the toxin. We propose that the alpha-sarcin domain RNA participates in elongation factor catalyzed binding of aminoacyl-tRNA and of translocation; that translocation is driven by transitions in the structure of the alpha-sarcin domain RNA initiated by the binding of the factors, or the hydrolysis of GTP, or both; and that to toxin inactivates the ribosomes by preventing this transition.
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Affiliation(s)
- Y Endo
- Department of Biochemistry, Yamanashi Medical College, Japan
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23
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Affiliation(s)
- V Paz
- Department of Biochemistry and Molecular Biology, University of Chicago, IL 60637
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24
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Abstract
The amino acid sequence of rat ribosomal protein S10 was deduced from the sequence of nucleotides in a recombinant cDNA and confirmed from the NH2-terminal amino acid sequence of the protein. Ribosomal protein S10 contains 165 amino acids and has a molecular mass of 18917 Da. Hybridization of the cDNA to digests of nuclear DNA suggests that there are 17-20 copies of the S10 gene. The mRNA for the protein is about 750 nucleotides in length. Ribosomal protein S10 has several possible internal duplications; one is a tandem repeat of ten residues that is basic and contains two or three prolines.
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Affiliation(s)
- A Glück
- Department of Biochemistry and Molecular Biology, University of Chicago, IL 60637
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25
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Peters UH, Glück A. [Personality at the end of a depressive phase. Observations after cessation of the endogenous depressive phases]. Nervenarzt 1973; 44:14-8. [PMID: 4687737] [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: 01/11/2023]
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26
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Peters UH, Glück A. [Problems of ending depressive phase]. Nervenarzt 1972; 43:505-11. [PMID: 4672064] [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: 01/11/2023]
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27
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Winkler M, Juliusberg F, Bandler V, Leibkind M, Glück A, Balban W, Spitzer E, Weiler, Stern M, Schwab T, Arzt L, Kyrle, Leiner, Baer T, Pick W. Akute und chronische Infektionskrankheiten. Arch Dermatol Res 1914. [DOI: 10.1007/bf01824644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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28
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Salzmann, Bandler V, Boas H, Leibkind M, Juliusberg F, Leibkind M, Zweig L, Friedeberg, Glück A, Joseph M, Stern M, Bernheim W. Syphilis. Allgemeiner Teil. Arch Dermatol Res 1914. [DOI: 10.1007/bf01824637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Leibkind M, Salzmann, Arzt, Kyrle, Glück A, Bandler V, Weiler, Pick W, Schwab T, Spitzer E, Münchheimer F. Bildungsanomalien. Arch Dermatol Res 1914. [DOI: 10.1007/bf01824643] [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: 11/27/2022]
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30
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