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Klasen JM, Germann N, Lutz S, Beck J, Fourie L. Breaking the Silence: A Workshop for Medical Students on Dealing With Failure in Medicine. Acad Med 2023; 98:1402-1405. [PMID: 37657075 DOI: 10.1097/acm.0000000000005438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/03/2023]
Abstract
PROBLEM Failure is a powerful teacher but an emotionally stressful experience. Before residency, when failure in clinical training is inevitable, medical students should learn to talk about and cope with failure. However, medical school curricula rarely include this topic, and physicians seldom share their mistakes and failures with trainees. This report describes and evaluates a workshop on dealing with failure in medicine. APPROACH Two attending surgical consultants and a life coach facilitated the workshop between February 2021 and February 2022, which consisted of different educational approaches, such as presentations, small group discussions, and journal clubs. The sessions aimed to enable medical learners to identify and analyze actual and potential failure events in everyday clinical practice and learn from them, disclose and communicate medical failures and "speak up," reflect on failure and develop coping strategies, and understand the moderating role of fear of failure. OUTCOMES Thirty medical students participated in the workshop. Dealing with failure in a productive manner was the medical learners' key learning objective and anticipated takeaway from the workshop. After the workshop, 19 of the 30 participants anonymously completed the standard university evaluation form. The medical students gave the workshop a mean (SD) rating of 8.59 (0.98) on a Likert scale ranging from 1 to 10. They felt better prepared to approach future challenges in a constructive manner after being equipped with strategies to deal with failure. Listening to the failure experiences of faculty and peers in a safe environment helped them accept that failure is inevitable. NEXT STEPS The findings suggest that medical students appreciated a safe environment to discuss failure. By promoting a safe learning environment early in the medical career, medical schools could make an important contribution to reducing the stigma of failure and eliminating the shame and blame culture, thus contributing to students' well-being.
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Buller R, Lutz S, Kazlauskas RJ, Snajdrova R, Moore JC, Bornscheuer UT. From nature to industry: Harnessing enzymes for biocatalysis. Science 2023; 382:eadh8615. [PMID: 37995253 DOI: 10.1126/science.adh8615] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 10/17/2023] [Indexed: 11/25/2023]
Abstract
Biocatalysis harnesses enzymes to make valuable products. This green technology is used in countless applications from bench scale to industrial production and allows practitioners to access complex organic molecules, often with fewer synthetic steps and reduced waste. The last decade has seen an explosion in the development of experimental and computational tools to tailor enzymatic properties, equipping enzyme engineers with the ability to create biocatalysts that perform reactions not present in nature. By using (chemo)-enzymatic synthesis routes or orchestrating intricate enzyme cascades, scientists can synthesize elaborate targets ranging from DNA and complex pharmaceuticals to starch made in vitro from CO2-derived methanol. In addition, new chemistries have emerged through the combination of biocatalysis with transition metal catalysis, photocatalysis, and electrocatalysis. This review highlights recent key developments, identifies current limitations, and provides a future prospect for this rapidly developing technology.
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Affiliation(s)
- R Buller
- Competence Center for Biocatalysis, Institute of Chemistry and Biotechnology, Zurich University of Applied Sciences, 8820 Wädenswil, Switzerland
| | - S Lutz
- Codexis Incorporated, Redwood City, CA 94063, USA
| | - R J Kazlauskas
- Department of Biochemistry, Molecular Biology and Biophysics, Biotechnology Institute, University of Minnesota, Saint Paul, MN 55108, USA
| | - R Snajdrova
- Novartis Institutes for BioMedical Research, Global Discovery Chemistry, 4056 Basel, Switzerland
| | - J C Moore
- MRL, Merck & Co., Rahway, NJ 07065, USA
| | - U T Bornscheuer
- Institute of Biochemistry, Dept. of Biotechnology and Enzyme Catalysis, Greifswald University, Greifswald, Germany
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Windisch R, Soliman S, Hoffmann A, Chen-Wichmann L, Lutz S, Kellner C, Redondo-Monte E, Vosberg S, Hartmann L, Schneider S, Beier F, Strobl C, Weigert O, Schuendeln M, Bernhagen J, Humpe A, Brendel C, Klump H, Greif P, Wichmann C. Converting a leukemic transcription factor into a powerful tool for large-scale ex vivo production of human phagocytes. Cytotherapy 2021. [DOI: 10.1016/s1465324921003844] [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: 10/21/2022]
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Kuntz L, Matthis R, Wegner N, Lutz S. Dosimetric comparison of mono-isocentric and multi-isocentric plans for oligobrain metastases: A single institutional experience. Cancer Radiother 2020; 24:53-59. [DOI: 10.1016/j.canrad.2019.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 09/30/2019] [Accepted: 10/08/2019] [Indexed: 12/31/2022]
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Storm Van's Gravesande K, Calabrese P, Blaschek A, Rostásy K, Huppke P, Rothe L, Mall V, Kessler J, Kalbe E, Dornfeld E, Elpers C, Lohmann H, Weddige A, Hagspiel S, Kirschner J, Brehm M, Blank C, Schubert J, Schimmel M, Pacheè S, Mohrbach M, Karenfort M, Kamp G, Lücke T, Neumann H, Lutz S, Gierse A, Sievers S, Schiffmann H, de Soye I, Trollmann R, Candova A, Rosner M, Neu A, Romer G, Seidel U, John R, Hofmann C, Schulz, Kinder S, Bertolatus A, Scheidtmann K, Lasogga R, Leiz S, Alber M, Kranz J, Bajer-Kornek B, Seidl R, Novak A. The Multiple Sclerosis Inventory of Cognition for Adolescents (MUSICADO): A brief screening instrument to assess cognitive dysfunction, fatigue and loss of health-related quality of life in pediatric-onset multiple sclerosis. Eur J Paediatr Neurol 2019; 23:792-800. [PMID: 31551133 DOI: 10.1016/j.ejpn.2019.08.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 07/23/2019] [Accepted: 08/22/2019] [Indexed: 10/26/2022]
Abstract
OBJECTIVE Screening for cognitive impairment (CI), fatigue and also Health-related quality of life (HRQoL) in patients with pediatric-onset multiple sclerosis (POMS) is of utmost importance in clinical practice. The aim of this study was to establish a new and validated pediatric screening tool "MUSICADO" that is easy to use and time economical. METHODS 106 patients with POMS aged 12-18 years and 210 healthy controls (HCs) stratified for age and education underwent neuropsychological testing including a screening test "Multiple Sclerosis Inventory of Cognition" for adults and 8 standardized cognitive tests and established scales to assess fatigue and HRQoL. RESULTS The phonemic verbal fluency task (RWT "s-words"), the Trail Making Test A (TMT-A), and the Digit Span Forward discriminated significantly between patients and HCs (p = 0.000, respectively) and showed the highest proportion of test failure in patients (24.5%, 17.9%; 15.1%, respectively). Therefore, they were put together to form the cognitive part of the "MUSICADO". After applying a scoring algorithm with balanced weighting of the subtests and age and education correction and a cut-off score for impairment, 35.8% of patients were categorized to be cognitively impaired (specificity: 88.6%). Fatigue was detected in 37.1% of the patients (specificity: 94.0%) and loss of HRQoL in 41.8% (specificity 95.7%) with the screening version, respectively. CONCLUSION The MUSICADO is a newly designed brief and easy to use screening test to help to early identify CI, fatigue, and loss of HRQoL in patients with POMS as cut scores are provided for all three items. Further studies will have to show its usability in independent samples of patients with POMS.
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Affiliation(s)
- K Storm Van's Gravesande
- Department of Pediatrics, Child and Adolescent Psychosomatics, Technische Universität München, Munich, Heigelhofstr. 63, 81377 München, Germany.
| | - P Calabrese
- Neuropsychology and Behavioral Neurology Unit, Division of Molecular and Cognitive Neuroscience, Department of Psychology, University of Basel, Birmannsgasse 8, 4055 Basel, Switzerland
| | - A Blaschek
- Department of Pediatric Neurology and Developmental Medicine, Dr. von Hauner Children's Hospital, Ludwig-Maximilians-University, Lindwurmstrasse 4, 80337 Munich, Germany
| | - K Rostásy
- Pediatric Neurology, Witten/Herdecke University, Children's Hospital Datteln, Dr. Friedrich Steiner Str. 5, 5711 Datteln, Germany
| | - P Huppke
- Department of Pediatrics and Adolescent Medicine, Division of Pediatric Neurology, University Medical Center Göttingen, Robert-Koch Strasse 40, 37075 Göttingen, Germany
| | - L Rothe
- Department of Neurology, University Hospital Cologne, Kerpenerstr. 62, 50937 Cologne, Germany
| | - V Mall
- Department of Pediatrics, Child and Adolescent Psychosomatics, Technische Universität München, Munich, Heigelhofstr. 63, 81377 München, Germany
| | - J Kessler
- Department of Neurology, University Hospital Cologne, Kerpenerstr. 62, 50937 Cologne, Germany
| | - E Kalbe
- Department of Medical Psychology ǀ, Neuropsychology and Gender Studies & Center for Neuropsychological Diagnostics and Intervention (CeNDI), University Hospital Cologne, Kerpenerstr. 62, 50937 Cologne, Germany
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Jaghutriz BA, Heni M, Lutz S, Staiger H, Peter A, Häring HU, Fritsche A, Wagner R. SNP x SNP Interaktionen bestätigen die Rolle des Diabetes-Risikogens TCF7L2 in der Vermittlung der Inkretinwirkung. DIABETOL STOFFWECHS 2018. [DOI: 10.1055/s-0038-1641804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- BA Jaghutriz
- Institut für Diabetesforschung und Metabolische Erkrankungen des Helmholtz Zentrum München an der Eberhard-Karls-Universität Tübingen, Tübingen, Germany
- Deutsches Zentrum für Diabetesforschung (DZD e.V.), Tübingen, Germany
- Universitätsklinikum Tübingen, Innere Medizin IV – Endokrinologie und Diabetologie, Angiologie, Nephrologie und Klinische Chemie, Tübingen, Germany
| | - M Heni
- Institut für Diabetesforschung und Metabolische Erkrankungen des Helmholtz Zentrum München an der Eberhard-Karls-Universität Tübingen, Tübingen, Germany
- Deutsches Zentrum für Diabetesforschung (DZD e.V.), Tübingen, Germany
- Universitätsklinikum Tübingen, Innere Medizin IV – Endokrinologie und Diabetologie, Angiologie, Nephrologie und Klinische Chemie, Tübingen, Germany
| | - S Lutz
- Institut für Diabetesforschung und Metabolische Erkrankungen des Helmholtz Zentrum München an der Eberhard-Karls-Universität Tübingen, Tübingen, Germany
- Deutsches Zentrum für Diabetesforschung (DZD e.V.), Tübingen, Germany
- Universitätsklinikum Tübingen, Innere Medizin IV – Endokrinologie und Diabetologie, Angiologie, Nephrologie und Klinische Chemie, Tübingen, Germany
| | - H Staiger
- Institut für Diabetesforschung und Metabolische Erkrankungen des Helmholtz Zentrum München an der Eberhard-Karls-Universität Tübingen, Tübingen, Germany
- Deutsches Zentrum für Diabetesforschung (DZD e.V.), Tübingen, Germany
- Universitätsklinikum Tübingen, Innere Medizin IV – Endokrinologie und Diabetologie, Angiologie, Nephrologie und Klinische Chemie, Tübingen, Germany
| | - A Peter
- Institut für Diabetesforschung und Metabolische Erkrankungen des Helmholtz Zentrum München an der Eberhard-Karls-Universität Tübingen, Tübingen, Germany
- Deutsches Zentrum für Diabetesforschung (DZD e.V.), Tübingen, Germany
- Universitätsklinikum Tübingen, Innere Medizin IV – Endokrinologie und Diabetologie, Angiologie, Nephrologie und Klinische Chemie, Tübingen, Germany
| | - HU Häring
- Institut für Diabetesforschung und Metabolische Erkrankungen des Helmholtz Zentrum München an der Eberhard-Karls-Universität Tübingen, Tübingen, Germany
- Deutsches Zentrum für Diabetesforschung (DZD e.V.), Tübingen, Germany
- Universitätsklinikum Tübingen, Innere Medizin IV – Endokrinologie und Diabetologie, Angiologie, Nephrologie und Klinische Chemie, Tübingen, Germany
| | - A Fritsche
- Institut für Diabetesforschung und Metabolische Erkrankungen des Helmholtz Zentrum München an der Eberhard-Karls-Universität Tübingen, Tübingen, Germany
- Deutsches Zentrum für Diabetesforschung (DZD e.V.), Tübingen, Germany
- Universitätsklinikum Tübingen, Innere Medizin IV – Endokrinologie und Diabetologie, Angiologie, Nephrologie und Klinische Chemie, Tübingen, Germany
| | - R Wagner
- Institut für Diabetesforschung und Metabolische Erkrankungen des Helmholtz Zentrum München an der Eberhard-Karls-Universität Tübingen, Tübingen, Germany
- Deutsches Zentrum für Diabetesforschung (DZD e.V.), Tübingen, Germany
- Universitätsklinikum Tübingen, Innere Medizin IV – Endokrinologie und Diabetologie, Angiologie, Nephrologie und Klinische Chemie, Tübingen, Germany
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Peipp M, Wesch D, Oberg HH, Lutz S, Muskulus A, van de Winkel JGJ, Parren PWHI, Burger R, Humpe A, Kabelitz D, Gramatzki M, Kellner C. CD20-Specific Immunoligands Engaging NKG2D Enhance γδ T Cell-Mediated Lysis of Lymphoma Cells. Scand J Immunol 2017; 86:196-206. [PMID: 28708284 DOI: 10.1111/sji.12581] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 06/25/2017] [Indexed: 02/02/2023]
Abstract
Human γδ T cells are innate-like T cells which are able to kill a broad range of tumour cells and thus may have potential for cancer immunotherapy. The activating receptor natural killer group 2 member D (NKG2D) plays a key role in regulating immune responses driven by γδ T cells. Here, we explored whether recombinant immunoligands consisting of a CD20 single-chain fragment variable (scFv) linked to a NKG2D ligand, either MHC class I chain-related protein A (MICA) or UL16 binding protein 2 (ULBP2), could be employed to engage γδ T cells for tumour cell killing. The two immunoligands, designated MICA:7D8 and ULBP2:7D8, respectively, enhanced cytotoxicity of ex vivo-expanded γδ T cells against CD20-positive lymphoma cells. Both Vδ1 and Vδ2 γδ T cells were triggered by MICA:7D8 or ULBP2:7D8. Killing of CD20-negative tumour cells was not induced by the immunoligands, indicating their antigen specificity. MICA:7D8 and ULBP2:7D8 acted in a dose-dependent manner and induced cytotoxicity at nanomolar concentrations. Importantly, chronic lymphocytic leukaemia (CLL) cells isolated from patients were sensitized by the two immunoligands for γδ T cell cytotoxicity. In a combination approach, the immunoligands were combined with bromohydrin pyrophosphate (BrHPP), an agonist for Vδ2 γδ T cells, which further enhanced the efficacy in target cell killing. Thus, employing tumour-directed recombinant immunoligands which engage NKG2D may represent an attractive strategy to enhance antitumour cytotoxicity of γδ T cells.
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Affiliation(s)
- M Peipp
- Division of Stem Cell Transplantation and Immunotherapy, 2nd Department of Medicine, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - D Wesch
- Institute of Immunology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - H-H Oberg
- Institute of Immunology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - S Lutz
- Division of Stem Cell Transplantation and Immunotherapy, 2nd Department of Medicine, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - A Muskulus
- Division of Stem Cell Transplantation and Immunotherapy, 2nd Department of Medicine, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - J G J van de Winkel
- Immunotherapy Laboratory, Department of Immunology, University Medical Center Utrecht, Utrecht, The Netherlands.,Genmab, Utrecht, The Netherlands
| | - P W H I Parren
- Genmab, Utrecht, The Netherlands.,Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark.,Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - R Burger
- Division of Stem Cell Transplantation and Immunotherapy, 2nd Department of Medicine, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - A Humpe
- Division of Stem Cell Transplantation and Immunotherapy, 2nd Department of Medicine, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - D Kabelitz
- Institute of Immunology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - M Gramatzki
- Division of Stem Cell Transplantation and Immunotherapy, 2nd Department of Medicine, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - C Kellner
- Division of Stem Cell Transplantation and Immunotherapy, 2nd Department of Medicine, Christian-Albrechts-University of Kiel, Kiel, Germany
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Wottawa M, Naas S, Böttger J, van Belle GJ, Möbius W, Revelo NH, Heidenreich D, von Ahlen M, Zieseniss A, Kröhnert K, Lutz S, Lenz C, Urlaub H, Rizzoli SO, Katschinski DM. Hypoxia-stimulated membrane trafficking requires T-plastin. Acta Physiol (Oxf) 2017; 221:59-73. [PMID: 28218996 DOI: 10.1111/apha.12859] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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: 01/09/2017] [Revised: 01/25/2017] [Accepted: 02/15/2017] [Indexed: 12/30/2022]
Abstract
AIM Traffic between the plasma membrane and the endomembrane compartments is an essential feature of eukaryotic cells. The secretory pathway sends cargoes from biosynthetic compartments to the plasma membrane. This is counterbalanced by a retrograde endocytic route and is essential for cell homoeostasis. Cells need to adapt rapidly to environmental challenges such as the reduction of pO2 which, however, has not been analysed in relation to membrane trafficking in detail. Therefore, we determined changes in the plasma membrane trafficking in normoxia, hypoxia, and after reoxygenation. METHODS Membrane trafficking was analysed by using the bulk membrane endocytosis marker FM 1-43, the newly developed membrane probe mCLING, wheat germ agglutinin as well as fluorescently labelled cholera toxin subunit B. Additionally, the uptake of specific membrane proteins was determined. In parallel, a non-biased SILAC screen was performed to analyse the abundance of membrane proteins in normoxia and hypoxia. RESULTS Membrane trafficking was increased in hypoxia and quickly reversed upon reoxygenation. This effect was independent of the hypoxia-inducible factor (HIF) system. Using SILAC technology, we identified that the actin-bundling protein T-plastin is recruited to the plasma membrane in hypoxia. By the use of T-plastin knockdown cells, we could show that T-plastin mediates the hypoxia-induced membrane trafficking, which was associated with an increased actin density in the cells as determined by electron microscopy. CONCLUSION Membrane trafficking is highly dynamic upon hypoxia. This phenotype is quickly reversible upon reoxygenation, which suggests that this mechanism participates in the cellular adaptation to hypoxia.
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Affiliation(s)
- M. Wottawa
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
| | - S. Naas
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
| | - J. Böttger
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
| | - G. J. van Belle
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
| | - W. Möbius
- Department of Neurogenetics; Max Planck Institute of Experimental Medicine; Göttingen Germany
- Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB); Göttingen Germany
| | - N. H. Revelo
- Institute of Neuro- and Sensory Physiology; UMG, CNMPB; Göttingen Germany
| | - D. Heidenreich
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
| | - M. von Ahlen
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
| | - A. Zieseniss
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
| | - K. Kröhnert
- Institute of Neuro- and Sensory Physiology; UMG, CNMPB; Göttingen Germany
| | - S. Lutz
- Institute of Pharmacology; UMG; Göttingen Germany
| | - C. Lenz
- Bioanalytical Mass Spectrometry; Max Planck Institute for Biophysical Chemistry; Göttingen Germany
- Bioanalytics Research Group; Institute of Clinical Chemistry; UMG; Göttingen Germany
| | - H. Urlaub
- Bioanalytical Mass Spectrometry; Max Planck Institute for Biophysical Chemistry; Göttingen Germany
- Bioanalytics Research Group; Institute of Clinical Chemistry; UMG; Göttingen Germany
| | - S. O. Rizzoli
- Institute of Neuro- and Sensory Physiology; UMG, CNMPB; Göttingen Germany
| | - D. M. Katschinski
- Institute of Cardiovascular Physiology; University Medical Center Göttingen (UMG); Göttingen Germany
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Linke F, Harenberg M, Nietert MM, Zaunig S, von Bonin F, Arlt A, Szczepanowski M, Weich HA, Lutz S, Dullin C, Janovská P, Krafčíková M, Trantírek L, Ovesná P, Klapper W, Beissbarth T, Alves F, Bryja V, Trümper L, Wilting J, Kube D. Microenvironmental interactions between endothelial and lymphoma cells: a role for the canonical WNT pathway in Hodgkin lymphoma. Leukemia 2016; 31:361-372. [DOI: 10.1038/leu.2016.232] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 07/07/2016] [Accepted: 08/03/2016] [Indexed: 02/07/2023]
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Linke F, Zaunig S, Nietert MM, von Bonin F, Lutz S, Dullin C, Janovská P, Beissbarth T, Alves F, Klapper W, Bryja V, Pukrop T, Trümper L, Wilting J, Kube D. WNT5A: a motility-promoting factor in Hodgkin lymphoma. Oncogene 2016; 36:13-23. [DOI: 10.1038/onc.2016.183] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 03/23/2016] [Accepted: 04/18/2016] [Indexed: 12/24/2022]
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Koelbel H, Hauffa B, Boukidis A, Lutz S, Della-Marina A, Schara U. Low ovarian reserve in girls with autosomal-recessive proximal spinal muscular atrophies type I–III. Neuromuscul Disord 2015. [DOI: 10.1016/j.nmd.2015.06.046] [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: 10/23/2022]
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Burda P, Kuster A, Hjalmarson O, Suormala T, Bürer C, Lutz S, Roussey G, Christa L, Asin-Cayuela J, Kollberg G, Andersson BA, Watkins D, Rosenblatt DS, Fowler B, Holme E, Froese DS, Baumgartner MR. Characterization and review of MTHFD1 deficiency: four new patients, cellular delineation and response to folic and folinic acid treatment. J Inherit Metab Dis 2015; 38:863-72. [PMID: 25633902 DOI: 10.1007/s10545-015-9810-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 12/15/2014] [Accepted: 01/06/2015] [Indexed: 01/15/2023]
Abstract
In the folate cycle MTHFD1, encoded by MTHFD1, is a trifunctional enzyme containing 5,10-methylenetetrahydrofolate dehydrogenase, 5,10-methenyltetrahydrofolate cyclohydrolase and 10-formyltetrahydrofolate synthetase activity. To date, only one patient with MTHFD1 deficiency, presenting with hyperhomocysteinemia, megaloblastic anaemia, hemolytic uremic syndrome (HUS) and severe combined immunodeficiency, has been identified (Watkins et al J Med Genet 48:590-2, 2011). We now describe four additional patients from two different families. The second patient presented with hyperhomocysteinemia, megaloblastic anaemia, HUS, microangiopathy and retinopathy; all except the retinopathy resolved after treatment with hydroxocobalamin, betaine and folinic acid. The third patient developed megaloblastic anaemia, infection, autoimmune disease and moderate liver fibrosis but not hyperhomocysteinemia, and was successfully treated with a regime that included and was eventually reduced to folic acid. The other two, elder siblings of the third patient, died at 9 weeks of age with megaloblastic anaemia, infection and severe acidosis and had MTFHD1 deficiency diagnosed retrospectively. We identified a missense mutation (c.806C > T, p.Thr296Ile) and a splice site mutation (c.1674G > A) leading to exon skipping in the second patient, while the other three harboured a missense mutation (c.146C > T, p.Ser49Phe) and a premature stop mutation (c.673G > T, p.Glu225*), all of which were novel. Patient fibroblast studies revealed severely reduced methionine formation from [(14)C]-formate, which did not increase in cobalamin supplemented culture medium but was responsive to folic and folinic acid. These additional cases increase the clinical spectrum of this intriguing defect, provide in vitro evidence of disturbed methionine synthesis and substantiate the effectiveness of folic or folinic acid treatment.
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Affiliation(s)
- P Burda
- Division of Metabolism and Children's Research Center, University Children's Hospital, Steinwiesstrasse 75, 8032, Zurich, Switzerland
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Quertinmont LT, Orru R, Lutz S. RApid Parallel Protein EvaluatoR (RAPPER), from gene to enzyme function in one day. Chem Commun (Camb) 2015; 51:122-4. [PMID: 25384037 DOI: 10.1039/c4cc08240k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cell-free transcription-translation systems offer an effective and versatile platform to explore the impact of genetic variations on protein function. We have developed a protocol for preparing linear, mutagenic DNA templates for direct use in the PURE system, enabling the fast and semi-quantitative evaluation of amino acid variations on catalytic activity and stereo-selectivity in native and engineered variants of Old Yellow Enzyme.
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Affiliation(s)
- L T Quertinmont
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA 30322, USA.
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Lutz S. SP-0001: Update on bone metastases guidelines and the International Consensus Conference on palliative Radiotherapy. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)40001-5] [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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15
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Kook PH, Lutz S, Sewell AC, Bigler B, Reusch CE. [Evaluation of serum cobalamin concentration in cats with clinical signs of gastrointestinal disease]. SCHWEIZ ARCH TIERH 2014; 154:479-86. [PMID: 23117990 DOI: 10.1024/0036-7281/a000391] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Medical records of 261 cats presenting with gastrointestinal disease that had a serum cobalamin concentration measured were reviewed. In addition, a reference range for cobalamin (305 - 1.967ng/L) was established using 22 healthy adult cats with undetectable levels of urinary methylmalonic acid. A total of 108 of 261 cats (41.4 %) had hypocobalaminemia; 69 cats (26.4 %) had cobalamin concentrations below the detection limit of the assay (< 150ng/L, group A) and 39 (15 %) had concentrations between 150 - 304ng/L (group B). The remaining 153 (58.6 %) cats had normal cobalamin concentrations (group C). Diarrhea was the most common clinical sign in hypocobalaminemic cats and vomiting or anorexia was the most common sign in normocobalaminemic cats. Only cats with both, vomiting and diarrhea were more likely to have hypocobalaminemia than cats with other clinical signs (odds ratio, 2.879; 95 % CI, 1.313 - 6.310). Serum cobalamin concentration was negatively correlated with age of the patient and positively correlated with body condition score. Cats of group A had a significantly higher neutrophil count (p = 0.0009) and higher MCV (p = 0.0064) and significantly lower hematocrit (p = 0.0018) and albumin concentration (p = 0.0037) than cats in other groups. There was no difference between cats of groups B and C with respect to complete blood cell counts and metabolic profiles. Among the diagnoses made in 125 cats (A 69.6 %, B 59 %, C 35.3 %), lymphoma and inflammatory enteropathy were most common. Lymphoma was diagnosed in 31.2 % (A 53.8 %, B 15.4 %, C 30.8 %) and inflammatory enteropathy in 22.4 % (A 35.7 %, B 7.1 %, C 57.2 %) of cats. Hypocobalaminemia is a frequent problem in cats with gastrointestinal disease. Presenting clinical signs as well as laboratory results may already indicate its probability and severity. However, only values below the detection limit of the assay seem to affect routine bloodwork results. Cobalamin should be routinely measured in feline gastrointestinal disease, as its serum concentration may influence the choice of further diagnostics.
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Affiliation(s)
- P H Kook
- Klinik für Kleintiermedizin, Universität Zürich.
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Schuster J, Smith T, Lutz S, Coyne P, Mitch A, Moghanaki D. A Compassionate Care Palliative Radiation Therapy Program for Cancer Patients Enrolled in Hospice: Offering Reduced-Cost Palliative Radiation Therapy in the Same Day as Evaluation. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2060] [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: 11/26/2022]
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17
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Hahn C, Kavanagh B, Bhatnagar A, Jacobson G, Lutz S, Patton C, Potters L, Steinberg M. “Choosing Wisely”: The American Society for Radiation Oncology’s Top 5 List. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1774] [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: 11/28/2022]
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18
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Vettel C, Lämmle S, Ewens S, Cervirgen C, Emons J, Ongherth A, Dewenter M, Lindner D, Westermann D, Nikolaev VO, Lutz S, Zimmermann WH, El-Armouche A. PDE2-mediated cAMP hydrolysis accelerates cardiac fibroblast to myofibroblast conversion and is antagonized by exogenous activation of cGMP signaling pathways. Am J Physiol Heart Circ Physiol 2014; 306:H1246-52. [PMID: 24531807 DOI: 10.1152/ajpheart.00852.2013] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Recent studies suggest that the signal molecules cAMP and cGMP have antifibrotic effects by negatively regulating pathways associated with fibroblast to myofibroblast (MyoCF) conversion. The phosphodiesterase 2 (PDE2) has the unique property to be stimulated by cGMP, which leads to a remarkable increase in cAMP hydrolysis and thus mediates a negative cross-talk between both pathways. PDE2 has been recently investigated in cardiomyocytes; here we specifically addressed its role in fibroblast conversion and cardiac fibrosis. PDE2 is abundantly expressed in both neonatal rat cardiac fibroblasts (CFs) and cardiomyocytes. The overexpression of PDE2 in CFs strongly reduced basal and isoprenaline-induced cAMP synthesis, and this decrease was sufficient to induce MyoCF conversion even in the absence of exogenous profibrotic stimuli. Functional stress-strain experiments with fibroblast-derived engineered connective tissue (ECT) demonstrated higher stiffness in ECTs overexpressing PDE2. In regard to cGMP, neither basal nor atrial natriuretic peptide-induced cGMP levels were affected by PDE2, whereas the response to nitric oxide donor sodium nitroprusside was slightly but significantly reduced. Interestingly, despite persistently depressed cAMP levels, both cGMP-elevating stimuli were able to completely prevent the PDE2-induced MyoCF phenotype, arguing for a double-tracked mechanism. In conclusion, PDE2 accelerates CF to MyoCF conversion, which leads to greater stiffness in ECTs. Atrial natriuretic peptide- and sodium nitroprusside-mediated cGMP synthesis completely reverses PDE2-induced fibroblast conversion. Thus PDE2 may augment cardiac remodeling, but this effect can also be overcome by enhanced cGMP. The redundant role of cAMP and cGMP as antifibrotic meditators may be viewed as a protective mechanism in heart failure.
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Affiliation(s)
- C Vettel
- Institute of Pharmacology, University Medical Center Göttingen, Germany
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Artunc F, Brechtel K, Kattner B, Celebi N, Bunz H, Jorbenadze R, Lutz S, Weyrich P, Haap M. Nierenversagen und wiederholte Episoden eines blitzartig auftretenden Lungenödems bei einer 70-jährigen Patientin - Fall 5/2013. Dtsch Med Wochenschr 2013; 138:1410. [DOI: 10.1055/s-0033-1343266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- F. Artunc
- Medizinische Klinik, Universitätsklinikum Tübingen
| | - K. Brechtel
- Radiologische Klinik, Universitätsklinikum Tübingen
| | - B. Kattner
- Medizinische Klinik, Universitätsklinikum Tübingen
| | - N. Celebi
- Medizinische Klinik, Universitätsklinikum Tübingen
| | - H. Bunz
- Medizinische Klinik, Universitätsklinikum Tübingen
| | | | - S. Lutz
- Medizinische Klinik, Universitätsklinikum Tübingen
| | - P. Weyrich
- Medizinische Klinik, Universitätsklinikum Tübingen
| | - M. Haap
- Medizinische Klinik, Universitätsklinikum Tübingen
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Lutz S. Bedeutung des Benchmarking in der Gesundheitswirtschaft. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346540] [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: 10/26/2022]
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Merrill FE, Bower D, Buckles R, Clark DD, Danly CR, Drury OB, Dzenitis JM, Fatherley VE, Fittinghoff DN, Gallegos R, Grim GP, Guler N, Loomis EN, Lutz S, Malone RM, Martinson DD, Mares D, Morley DJ, Morgan GL, Oertel JA, Tregillis IL, Volegov PL, Weiss PB, Wilde CH, Wilson DC. The neutron imaging diagnostic at NIF (invited). Rev Sci Instrum 2012; 83:10D317. [PMID: 23126843 DOI: 10.1063/1.4739242] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A neutron imaging diagnostic has recently been commissioned at the National Ignition Facility (NIF). This new system is an important diagnostic tool for inertial fusion studies at the NIF for measuring the size and shape of the burning DT plasma during the ignition stage of Inertial Confinement Fusion (ICF) implosions. The imaging technique utilizes a pinhole neutron aperture, placed between the neutron source and a neutron detector. The detection system measures the two dimensional distribution of neutrons passing through the pinhole. This diagnostic has been designed to collect two images at two times. The long flight path for this diagnostic, 28 m, results in a chromatic separation of the neutrons, allowing the independently timed images to measure the source distribution for two neutron energies. Typically the first image measures the distribution of the 14 MeV neutrons and the second image of the 6-12 MeV neutrons. The combination of these two images has provided data on the size and shape of the burning plasma within the compressed capsule, as well as a measure of the quantity and spatial distribution of the cold fuel surrounding this core.
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Affiliation(s)
- F E Merrill
- Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA.
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Alpers M, Blix T, Kirkwood S, Krankowsky D, Lübken FJ, Lutz S, von Zahn U. First simultaneous measurements of neutral and ionized iron densities in the upper mesosphere. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/92ja01665] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [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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Chow E, Zeng L, Salvo N, Dennis K, Tsao M, Lutz S. Update on the systematic review of palliative radiotherapy trials for bone metastases. Clin Oncol (R Coll Radiol) 2011; 24:112-24. [PMID: 22130630 DOI: 10.1016/j.clon.2011.11.004] [Citation(s) in RCA: 395] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Revised: 10/08/2011] [Accepted: 11/09/2011] [Indexed: 12/25/2022]
Abstract
AIMS To update previous meta-analyses of randomised palliative radiotherapy trials comparing single fractions versus multiple fractions. MATERIALS AND METHODS All published randomised controlled trials comparing single fraction versus multiple fraction schedules for the palliation of uncomplicated bone metastases were included in this analysis. Odds ratios and 95% confidence intervals were calculated for each trial. Forest plots were created using a random effects model and the Mantel-Haenszel statistic. RESULTS In total, 25 randomised controlled trials were identified. For intention-to-treat patients, the overall response rate was similar in patients receiving single fractions (1696 of 2818; 60%) and multiple fractions (1711 of 2799; 61%). Complete response rates were 620 of 2641 (23%) in the single fraction arm and 634 of 2622 (24%) in the multiple fraction arm. No significant difference was seen in overall or complete response rates. Pathological fracture did not favour either arm, but spinal cord compression trended towards favouring multiple fractions; however, neither was statistically significant (P = 0.72 and P = 0.13, respectively). Retreatment rates favoured patients in the multiple fraction arm, where the likelihood of requiring re-irradiation was 2.6-fold greater in the single fraction arm (95% confidence interval: 1.92-3.47; P < 0.00001). Repeated analyses excluding drop-out patients did not alter these findings. In general, no significant differences in acute toxicities were seen. CONCLUSION Overall and complete response rates were similar in both intention-to-treat and assessable patients. Single and multiple fraction regimens provided equal pain relief; however, significantly higher retreatment rates occurred in those receiving single fractions.
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Affiliation(s)
- E Chow
- Department of Radiation Oncology, Odette Cancer Centre, University of Toronto, Ontario, Canada.
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Schara U, Sprinz A, Lutz S. P1.9 Glucocorticoid therapy in a non-ambulant six year old boy with Duchenne muscular dystrophy. Neuromuscul Disord 2011. [DOI: 10.1016/j.nmd.2011.06.769] [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: 10/17/2022]
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Krasny A, Lutz S, Gramsch C, Diepenbruck S, Schlamann M. Accessory eye muscle in a young boy with external ophthalmoplegia. Clin Anat 2011; 24:948-9. [DOI: 10.1002/ca.21262] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Revised: 07/25/2011] [Accepted: 07/26/2011] [Indexed: 11/10/2022]
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Hoskin P, Chow E, Dawson L, Hahn C, Holt T, Lutz S, Rodrigues G, Tsao M. 520 oral THIRD INTERNATIONAL CONSENSUS ON PALLIATIVE RADIOTHERAPY: A JOINT ASTRO, ESTRO, CARO & TROG INITIATIVE. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)70642-9] [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: 10/18/2022]
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Vassiliou V, Andreopoulos D, Frangos S, Tselis N, Giannopoulou E, Lutz S. Bone metastases: assessment of therapeutic response through radiological and nuclear medicine imaging modalities. Clin Oncol (R Coll Radiol) 2011; 23:632-45. [PMID: 21530193 DOI: 10.1016/j.clon.2011.03.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 01/11/2011] [Accepted: 01/13/2011] [Indexed: 12/15/2022]
Abstract
Radiological and nuclear medicine imaging modalities used for assessing bone metastases treatment response include plain and digitalised radiography (XR), skeletal scintigraphy (SS), dual-energy X-ray absorptiometry (DEXA), computed tomography (CT), magnetic resonance imaging (MRI), [(18)F] fluorodeoxyglucose positron emission tomography (FDG-PET) and PET/CT. Here we discuss the advantages and disadvantages of these assessment modalities as evident through different clinical trials. Additionally, we present the more established response criteria of the International Union Against Cancer and the World Health Organization and compare them with newer MD Anderson criteria. Even though serial XR and SS have been used to assess the therapeutic response for decades, several months are required before changes are evident. Newer techniques, such as MRI or PET, may allow an earlier evaluation of response that may be quantified through monitoring changes in signal intensity and standard uptake value, respectively. Moreover, the application of PET/CT, which can follow both morphological and metabolic changes, has yielded interesting and promising results that give a new insight into the natural history of metastatic bone disease. However, only a few studies have investigated the application of these newer techniques and further clinical trials are needed to corroborate their promising results and establish the most suitable imaging parameters and evaluation time points. Last, but not least, there is an absolute need to adopt uniform response criteria for bone metastases through an international consensus in order to better assess treatment response in terms of accuracy and objectivity.
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Affiliation(s)
- V Vassiliou
- Department of Radiation Oncology, Bank of Cyprus Oncology Centre, Nicosia, Cyprus
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Lavoie J, Cesarini C, Lavoie-Lamoureux A, Moran K, Lutz S, Picandet V, Jean D, Marcoux M. Bronchoalveolar Lavage Fluid Cytology and Cytokine Messenger Ribonucleic Acid Expression of Racehorses with Exercise Intolerance and Lower Airway Inflammation. J Vet Intern Med 2011; 25:322-9. [DOI: 10.1111/j.1939-1676.2010.0664.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Mark D, Focke M, Lutz S, Burger J, Müller M, Riegger L, Rombach M, Hoffmann J, Roth G, Piepenburg O, Park Y, Zengerle R, von Stetten F. Lab-on-a-chip solutions designed for being operated on standard laboratory instruments. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.proeng.2010.09.142] [Citation(s) in RCA: 5] [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: 11/25/2022]
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Lutz S, Hoskin P, Chow E. Update on Palliative Radiotherapy Endpoints for Bone Metastasis Trials. Clin Oncol (R Coll Radiol) 2009; 21:659-61. [DOI: 10.1016/j.clon.2009.07.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Accepted: 07/29/2009] [Indexed: 11/29/2022]
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Small W, James J, Moore T, Fintel D, Lutz S, Movsas B, Suntharalingam M, Graces Y, Ivker R, Berk L. A Phase II Randomized Trial with Captopril in Patients Who Have Received Radiation Therapy +/- Chemotherapy for Stage II–IIIB Non–small Cell Lung Cancer and Stage I Central Non–small Cell Lung Cancer, or Limited-stage Small–cell Lung Cancer: RTOG 0123. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.1054] [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: 11/29/2022]
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Lutz S, Weber P, Focke M, Faltin B, Roth G, Piepenburg O, Armes N, Mark D, Zengerle R, von Stetten F. Isothermal Polymerase Amplification in a Centrifugal Microfluidic Foil Cartridge. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.proche.2009.07.132] [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: 11/25/2022]
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Kragl G, Baier F, Lutz S, Albrich D, Kroupa B, Wiezorek T, Georg D. FLATTENING FILTER FREE BEAMS IN IMRT AND SBRT: DOSIMETRIC ASS ESSMENTOF PERIPHERAL DOSE. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(12)72985-7] [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: 10/27/2022]
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Abstract
A repetitive DNA motif, consisting of 48 bp units (D22Z3) was shown to reside in the pericentric region of the human chromosome 22. In genomic blots it was displaying cross-homology only to great ape species, the restriction patterns being similar but specific for each species investigated. Non-radioactive in situ hybridization revealed a minor homology to human chromosomes 14/15 when less stringent conditions were applied. In gorilla, only chromosomes corresponding to human G-group autosomes showed a distinct cross-hybridization, whereas in chimpanzee, homology to this sequence was observed for all acrocentric chromosomes, even with reduced signal accumulation for the human 22 equivalent at higher stringencies.
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Fairchild A, Harris K, Wong R, Barnes T, Cheung P, Lutz S, Bezjak A, Chow E. Palliative Thoracic Radiotherapy for Lung Cancer: A Systematic Review. Int J Radiat Oncol Biol Phys 2007. [DOI: 10.1016/j.ijrobp.2007.07.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Riegger L, Grumann M, Steigert J, Lutz S, Steinert CP, Mueller C, Viertel J, Prucker O, Rühe J, Zengerle R, Ducrée J. Single-step centrifugal hematocrit determination on a 10-$ processing device. Biomed Microdevices 2007; 9:795-9. [PMID: 17534715 DOI: 10.1007/s10544-007-9091-1] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [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: 10/23/2022]
Abstract
We present a novel concept to process human blood on a spinning polymer disk for the determination of the hematocrit level by simple visual inspection. The microfluidic disk which is spun by a macroscopic drive unit features an upstream metering structure and a downstream blind channel where the centrifugally enforced sedimentation of the blood is performed. The bubble-free priming of the blind channel is governed by centrifugally assisted capillary filling along the sloped hydrophilic side-wall and the lid as well as the special shape of the dead end of the two-layer channel. The hematocrit is indicated at the sharp phase boundary between the plasma and the segregated cellular pellet on a disk-imprinted calibrated scale. This way, we conduct the hematocrit determination of human blood within 5 min at a high degree of linearity (R(2) = 0.999) and at a high accuracy (CV = 4.7%) spanning over the physiological to pathological working range. As all processing steps including the priming, the metering to a defined volume as well as the centrifugation are executed automatically during rotation, the concept is successfully demonstrated in a conventional PC-CDROM drive while delivering the same performance (R(2) = 0.999, CV = 4.3%).
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Affiliation(s)
- L Riegger
- Laboratory for MEMS Applications, Department of Microsystems Engineering (IMTEK), University of Freiburg, Georges-Koehler-Allee 106, 79110 Freiburg, Germany.
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Steigert J, Brenner T, Grumann M, Riegger L, Lutz S, Zengerle R, Ducrée J. Integrated siphon-based metering and sedimentation of whole blood on a hydrophilic lab-on-a-disk. Biomed Microdevices 2007; 9:675-9. [PMID: 17505885 DOI: 10.1007/s10544-007-9076-0] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.1] [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: 11/26/2022]
Abstract
In this paper, we present a novel and fully integrated centrifugal microfluidic "lab-on-a-disk" for rapid colorimetric assays in human whole blood. All essential steps comprising blood sampling, metering, plasma extraction and the final optical detection are conducted within t=150 s in passive, globally hydrophilized structures which obviate the need for intricate local hydrophobic surface patterning. Our technology features a plasma extraction structure (V=500 nL, CV<5%) where the purified plasma (cRBC<0.11%) is centrifugally separated, metered by an overflow and subsequently extracted by a siphon-based principle through a hydrophilic extraction channel into the detection chamber.
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Affiliation(s)
- J Steigert
- Laboratory for MEMS Applications, Department for Microsystems Engineering (IMTEK), University of Freiburg, Georges-Koehler-Allee 106, 79110, Freiburg, Germany.
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Abraham C, Lutz S. 2571. Int J Radiat Oncol Biol Phys 2006. [DOI: 10.1016/j.ijrobp.2006.07.984] [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: 10/24/2022]
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Mohl M, Winkler S, Wieland T, Lutz S. Gef10--the third member of a Rho-specific guanine nucleotide exchange factor subfamily with unusual protein architecture. Naunyn Schmiedebergs Arch Pharmacol 2006; 373:333-41. [PMID: 16896804 DOI: 10.1007/s00210-006-0083-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [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: 04/21/2006] [Accepted: 06/13/2006] [Indexed: 10/24/2022]
Abstract
According to cDNA sequence homologies, Gef10 is related to the Rho-specific guanine nucleotide exchange factors GrinchGEF and p164-RhoGEF. Like these GEFs, Gef10 exhibits only weak homology to known pleckstrin homology domains, but contains a putative WD40-like domain. As detected by RT-PCR, Gef10 is transcribed in at least two splice variants in different human tissues. Although the Gef10 sequence contains two putative transmembrane segments, recombinantly expressed Gef10 displays a cytosolic localisation. As detected by guanine nucleotide exchange activity assay, precipitation assay of GTP-bound Rho proteins and serum response element dependent gene transcription Gef10 activates RhoA-C, but not Rac1 or Cdc42. In the reporter gene assay, Gef10 preferentially activated RhoB. When expressed in NIH3T3 cells, Gef10 induced actin stress fibre, but not lamellipodia or filopodia formation. We conclude that Gef10 is the third member of a Rho-specific GEF family with unusual protein architecture.
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Affiliation(s)
- M Mohl
- Institut für Experimentelle und Klinische Pharmakologie und Toxikologie, Universität Heidelberg, Maybachstr 14, D-68169 Mannheim, Germany
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Lutz S, Ashworth J, Spence C, Connor S. The use of radiotherapy in hospice patients: A population-based study from the National Hospice Outcomes Project. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.8074] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- S. Lutz
- Blanchard Valley Regional Cancer Ctr, Findlay, OH; National Hospice and Palliative Care Organization, Alexandria, VA
| | - J. Ashworth
- Blanchard Valley Regional Cancer Ctr, Findlay, OH; National Hospice and Palliative Care Organization, Alexandria, VA
| | - C. Spence
- Blanchard Valley Regional Cancer Ctr, Findlay, OH; National Hospice and Palliative Care Organization, Alexandria, VA
| | - S. Connor
- Blanchard Valley Regional Cancer Ctr, Findlay, OH; National Hospice and Palliative Care Organization, Alexandria, VA
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Hacker UT, Wingenfeld L, Kofler DM, Schuhmann NK, Lutz S, Herold T, King SBS, Gerner FM, Perabo L, Rabinowitz J, McCarty DM, Samulski RJ, Hallek M, Büning H. Adeno-associated virus serotypes 1 to 5 mediated tumor cell directed gene transfer and improvement of transduction efficiency. J Gene Med 2005; 7:1429-38. [PMID: 15945124 DOI: 10.1002/jgm.782] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [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: 11/08/2022] Open
Abstract
BACKGROUND Gene therapy is an attractive new approach for the treatment of cancer. Therefore, the development of efficient vector systems is of crucial importance in this field. Different adeno-associated virus (AAV) serotypes have been characterized so far, which show considerable differences in tissue tropism. Consequently, we aimed to characterize the most efficient serotype for this application. METHODS To exclude all influences other than those provided by the capsid, all serotypes contained the same transgene cassette flanked by the AAV2 inverted terminal repeats. We systematically compared these vectors for efficiency in human cancer cell directed gene transfer. In order to identify limiting steps, the influence of second-strand synthesis and proteasomal degradation of AAV in a poorly transducible cell line were examined. RESULTS AAV2 was the most efficient serotype in all solid tumor cells and primary melanoma cells with transduction rates up to 98 +/- 0.3%. Transduction above 70% could be reached with serotypes 1 (in cervical and prostate carcinoma) and 3 (in cervical, breast, prostate and colon carcinoma) using 1000 genomic particles per cell. In the colon carcinoma cell line HT-29 proteasomal degradation limited AAV1-AAV4-mediated gene transfer. Moreover, inefficient second-strand synthesis prevents AAV2-mediated transgene expression in this cell line. CONCLUSIONS Recent advances in AAV-vector technology suggest that AAV-based vectors can be used for cancer gene therapy. Our comparative analysis revealed that, although AAV2 is the most promising candidate for such an application, serotypes 1 and 3 are valid alternatives. Furthermore, the use of self-complementary AAV vectors and proteasome inhibitors significantly improves cancer cell transduction.
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Affiliation(s)
- Ulrich T Hacker
- Klinik für Innere Medizin I, Klinikum der Universität zu Köln, Joseph-Stelzmann-Strasse 9, 50925 Köln, Germany
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Lutz S, Chow E, Kerr M, Connor S. An economic analysis of single fraction radiotherapy for treatment of hospice patients with symptomatic bone metastasis. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.8031] [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: 11/20/2022] Open
Affiliation(s)
- S. Lutz
- Blanchard Valley Regional Cancer Center, Findlay, OH; Toronto Sunnybrook Regional Cancer Center, Toronto, ON, Canada; National Hospice & Palliative Care Organization, Alexandria, VA
| | - E. Chow
- Blanchard Valley Regional Cancer Center, Findlay, OH; Toronto Sunnybrook Regional Cancer Center, Toronto, ON, Canada; National Hospice & Palliative Care Organization, Alexandria, VA
| | - M. Kerr
- Blanchard Valley Regional Cancer Center, Findlay, OH; Toronto Sunnybrook Regional Cancer Center, Toronto, ON, Canada; National Hospice & Palliative Care Organization, Alexandria, VA
| | - S. Connor
- Blanchard Valley Regional Cancer Center, Findlay, OH; Toronto Sunnybrook Regional Cancer Center, Toronto, ON, Canada; National Hospice & Palliative Care Organization, Alexandria, VA
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Dieterich M, Bense S, Lutz S, Drzezga A, Stephan T, Bartenstein P, Brandt T. Dominance for vestibular cortical function in the non-dominant hemisphere. Cereb Cortex 2003; 13:994-1007. [PMID: 12902399 DOI: 10.1093/cercor/13.9.994] [Citation(s) in RCA: 374] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The aim of this (15)O-labelled H(2)O bolus positron emission tomography (PET) study was to analyse the hemispheric dominance of the vestibular cortical system. Therefore, the differential effects of caloric vestibular stimulation (right or left ear irrigation with warm water at 44 degrees C) on cortical and subcortical activation were studied in 12 right-handed and 12 left-handed healthy volunteers. Caloric irrigation induces a direction-specific sensation of rotation and nystagmus. Significant regional cerebral blood flow increases were found in a network within both hemispheres, including the superior frontal gyrus/sulcus, the precentral gyrus and the inferior parietal lobule with the supramarginal gyrus. These areas correspond best to the cortical ocular motor centres, namely the prefrontal cortex, the frontal eye field and the parietal eye field, known to be involved in the processing of caloric nystagmus. Furthermore, distinct temporo-parietal activations could be separated in the posterior part of the insula with the adjacent superior temporal gyrus, the inferior parietal lobule and precuneus. These areas fit best to the human homologues of multisensory vestibular cortex areas identified in the monkey and correspond to the parieto-insular vestibular cortex (PIVC), the visual temporal sylvian area (VTS) and areas 7 and 6. Further cortical activations were seen in the anterior insula, the inferior frontal gyrus and anterior cingulum. The subcortical activation pattern in the putamen, thalamus and midbrain is consistent with the organization of efferent ocular motor pathways. Cortical and subcortical activation of the described areas was bilateral during monaural stimulation, but predominant in the hemisphere ipsilateral to the stimulated ear and exhibited a significant right hemispheric dominance for vestibular and ocular motor structures in right-handed volunteers. Similarly, a significant left hemispheric dominance was found in the 12 left-handed volunteers. Thus, this PET study showed for the first time that cortical and subcortical activation by vestibular caloric stimulation depends (i) on the handedness of the subjects and (ii) on the side of the stimulated ear. Maximum activation was therefore found when the non-dominant hemisphere was ipsilateral to the stimulated ear, i.e. in the right hemisphere of right-handed subjects during caloric irrigation of the right ear and in the left hemisphere of left-handed subjects during caloric irrigation of the left ear. The localization of handedness and vestibular dominance in opposite hemispheres might conceivably indicate that the vestibular system and its hemispheric dominance, which matures earlier during ontogenesis, determine right- or left-handedness.
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Affiliation(s)
- M Dieterich
- Department of Neurology, Johannes Gutenberg-University, Mainz, Germany.
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Lutz S, Norrell R, Bertucio C, Kachnic L, Johnson C, Arthur D, Schwarz M, Palardy G. Symptom frequency and severity in patients with metastatic or locally recurrent lung cancer: a prospective study using the Lung Cancer Symptom Scale in a community hospital. J Palliat Med 2002; 4:157-65. [PMID: 11441624 DOI: 10.1089/109662101750290191] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.6] [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: 11/13/2022] Open
Abstract
PURPOSE To define symptoms and therapeutic requirements for patients with metastatic or locally recurrent lung cancer. METHODS AND MATERIALS Data were collected from 69 consecutive patients with locally advanced lung cancer seen in consultation at a radiation oncology facility serving a community hospital in Virginia. The Lung Cancer Symptom Scale, a validated quality of life instrument, measured the incidence of symptoms in this group. RESULTS Average survival for the entire group was 7 months. Fifty-seven patients received 81 courses of radiation therapy, 33 directed at thoracic disease and 48 delivered to sites of metastasis. Thirty-three percent of those who received radiation therapy required treatment to more than one anatomic site. Every patient was symptomatic at the time of consultation, with the number (p = 0.001) and severity (p = 0.001) of symptoms they suffered worse in the patient group seen 0 to 3 months prior to death rather than 4 to 6 months prior to death. With the exception of cough, symptoms were marked in their severity. CONCLUSIONS Patients with advanced lung cancer suffer frequent and severe symptoms that worsen in the final months of life. The appropriate timing and combination of radiotherapy and chemotherapy are yet to be resolved. Future studies will require use of validated quality of life instruments to better catalogue palliation and treatment toxicity.
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Affiliation(s)
- S Lutz
- Department of Radiation Oncology, Methodist Healthcare System, Memphis, Tennessee, USA.
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Lutz S, Henkind SJ. A primer of E-health terms. Healthplan 2001; 42:64, 66-7. [PMID: 16296194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Affiliation(s)
- S Lutz
- Healthcare E-Business Practice, PricewaterhouseCoopers
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Lutz S, Ostermeier M, Moore GL, Maranas CD, Benkovic SJ. Creating multiple-crossover DNA libraries independent of sequence identity. Proc Natl Acad Sci U S A 2001; 98:11248-53. [PMID: 11562494 PMCID: PMC58715 DOI: 10.1073/pnas.201413698] [Citation(s) in RCA: 112] [Impact Index Per Article: 4.9] [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] Open
Abstract
We have developed, experimentally implemented, and modeled in silico a methodology named SCRATCHY that enables the combinatorial engineering of target proteins, independent of sequence identity. The approach combines two methods for recombining genes: incremental truncation for the creation of hybrid enzymes and DNA shuffling. First, incremental truncation for the creation of hybrid enzymes is used to create a comprehensive set of fusions between fragments of genes in a DNA homology-independent fashion. This artificial family is then subjected to a DNA-shuffling step to augment the number of crossovers. SCRATCHY libraries were created from the glycinamide-ribonucleotide formyltransferase (GART) genes from Escherichia coli (purN) and human (hGART). The developed modeling framework eSCRATCHY provides insight into the effect of sequence identity and fragmentation length on crossover statistics and draws contrast with DNA shuffling. Sequence analysis of the naive shuffled library identified members with up to three crossovers, and modeling predictions are in good agreement with the experimental findings. Subsequent in vivo selection in an auxotrophic E. coli host yielded functional hybrid enzymes containing multiple crossovers.
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Affiliation(s)
- S Lutz
- Department of Chemical Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2694, USA
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Lutz S, Henkind SJ. E-mail: taming the monster. Healthplan 2001; 42:74, 76-8. [PMID: 16296280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Affiliation(s)
- S Lutz
- Healthcare E-Business Practice, PricewaterhouseCoopers, USA
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Lutz S, Henkind SJ. Plan websites: building traffic. Healthplan 2001; 42:72-4. [PMID: 16296305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Affiliation(s)
- S Lutz
- National Healthcare Practice, Pricewaterhouse Coopers
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Abstract
Some preschoolers may be at risk for overweight and obesity. To gain greater insight into children's early nutrition socialization experiences, the association of adult nutrition attitudes and mealtime behaviors to young children's eating behaviors and weight-for-height was investigated. Forty-six parent-child pairs and 8 Head Start teachers participated. Children were weighed and measured; parents completed measures of child eating behaviors, nutrition attitudes, and family mealtimes; teachers reported their own nutrition attitudes and were observed during mealtimes. Correlational findings indicated that parents' negative mealtime practices were associated with higher child weight-for-height and that parents' positive nutrition-attitudes were related to more pleasant family mealtimes, fewer negative mealtime practices, and less troublesome child eating behaviors. The Head Start mealtime environment was developmentally appropriate and predictable for children. Although teachers engaged in some nutrition teaching during meals, a number of opportunities were missed for promoting children's nutrition socialization. In sum, these results identified potential opportunities for improving children's early nutrition socialization experiences.
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Affiliation(s)
- S Gable
- University of Missouri, 306 Gentry Hall, Columbia, MO 65211-7700, USA
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