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Li M, Mindt S, Lück A, Hutzschenreuter U, Kollendt M, Lathan B, Zöller T, Frank-Gleich S, Lorentz C, Lamberti C, Sick C, Zingerle M, Tesch H, Stein W, Hebart H, Stosiek C, Sandner R, Fries S, Burkholder I, Hofheinz RD. Drug monitoring detects under- and overdosing in patients receiving 5-fluorouracil-containing chemotherapy-results of a prospective, multicenter German observational study. ESMO Open 2023; 8:101201. [PMID: 36965262 PMCID: PMC10073640 DOI: 10.1016/j.esmoop.2023.101201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 02/22/2023] [Accepted: 02/26/2023] [Indexed: 03/27/2023] Open
Abstract
INTRODUCTION Body surface area (BSA)-based dosing of 5-fluorouracil (5-FU) results in marked inter-individual variability in drug levels, whereas determination of plasma 5-FU concentration and area under the curve (AUC) is a more precise dosing method but has not been integrated into clinical routine. We conducted a multicenter, prospective study to study 5-FU AUC distributions and assess clinical factors predicting therapeutic dosing in patients receiving BSA-dosed 5-FU. METHODS Between June 2017 and January 2018, a total of 434 patients receiving continuous, infusional BSA-dosed 5-FU from 37 sites in Germany were included. Plasma 5-FU concentration and AUC were measured in venous blood samples at steady state. The primary objective was to determine 5-FU AUC distributions in relation to the target range, which is defined as 20-30 mg × h/l. The second objective was to explore clinical parameters that correlate with achievement of 5-FU AUC target range. RESULTS The primary tumor was mainly located in the gastrointestinal tract (96.3%), with colorectal cancer being the most common (71.2%) tumor entity. 5-FU was administered as monotherapy (8.1%) or as part of FOLFOX (33.2%), FOLFIRI (26.3%), or other regimens (12.4%). Treatment setting was adjuvant (31.3%) or metastatic (64.5%). The median AUC was 16 mg × h/l. Only 20.3% of patients received 5-FU treatment within the target range, whereas the majority of patients (60.6%) were underdosed and 19.1% of patients were overdosed. In the univariate logistic regression, treatment setting was the only clinical parameter that significantly correlated with achievement of the target range. Patients treated in the metastatic setting had a 2.1 (95% confidence interval 1.186-3.776, P = 0.011) higher odds to reach the target range compared with patients treated in the adjuvant setting. CONCLUSIONS The majority of patients received suboptimal doses of 5-FU using BSA dosing. Therapeutic drug monitoring of 5-FU is an option for optimized individualized cancer therapy and should be integrated into the clinical practice.
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Affiliation(s)
- M Li
- Department of Medicine II, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - S Mindt
- Institut für Labor- und Transfusionsmedizin, Klinikum Passau, Passau, Germany
| | - A Lück
- Facharztpraxis für Hämatologie, Onkologie und Innere Medizin, Rostock, Germany
| | - U Hutzschenreuter
- Hämatologisch-Onkologische Gemeinschaftspraxis Nordhorn, Nordhorn, Germany
| | - M Kollendt
- Praxis am Volkspark, Schwerpunktpraxis für Hämatologie und Onkologie, Berlin, Germany
| | - B Lathan
- Gemeinschaftspraxis für Hämatologie und Onkologie, Dortmund, Germany
| | - T Zöller
- Schwerpunktpraxis für Hämatologie und Internistische Onkologie, Coburg, Germany
| | - S Frank-Gleich
- Gemeinschaftspraxis und Tagesklinik Innere Medizin, Hämatologie, Onkologie, Gastroenterologie, Halle, Germany
| | - C Lorentz
- Onkologische Schwerpunkt-Praxis Worms, Worms, Germany
| | - C Lamberti
- Klinik für Hämatologie und Onkologie, Klinikum Coburg, Coburg, Germany
| | - C Sick
- Gemeinschaftspraxis Onkologie und Infektiologie, Bremen, Germany
| | - M Zingerle
- Hämato-Onkologische überörtliche Gemeinschaftspraxis Pasing und Fürstenfeldbruck, Munich, Germany
| | - H Tesch
- CHOP GmbH Comprehensive Haematology and Oncology Practice, Hämatologisch-Onkologische Gemeinschaftspraxis, Wiesbaden, Germany
| | - W Stein
- Medizinische Klinik, Klinikum Frankfurt (Oder), Frankfurt (Oder), Germany
| | - H Hebart
- Zentrum für Innere Medizin, Kliniken Ostalb, Stauferklinikum, Mutlangen, Germany
| | - C Stosiek
- Gemeinschaftspraxis Dr. med. Alexander Kröber und Dr. med. Catarina Stosiek, Regensburg, Germany
| | - R Sandner
- Passauer onkolologische Praxis Dres, Siegfried D. Prenninger und Reiner Sandner, Passau, Germany
| | - S Fries
- Onkologische Schwerpunktpraxis Bamberg, Bamberg, Germany
| | - I Burkholder
- Department of Nursing and Health, University of Applied Sciences of the Saarland, Saarbrücken, Germany
| | - R-D Hofheinz
- Mannheim Cancer Center, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.
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Bergmann C, Distler JHW, Treutlein C, Tascilar K, Müller AT, Atzinger A, Matei AE, Knitza J, Györfi AH, Lück A, Dees C, Soare A, Ramming A, Schönau V, Distler O, Prante O, Ritt P, Götz TI, Köhner M, Cordes M, Bäuerle T, Kuwert T, Schett G, Schmidkonz C. 68Ga-FAPI-04 PET-CT for molecular assessment of fibroblast activation and risk evaluation in systemic sclerosis-associated interstitial lung disease: a single-centre, pilot study. Lancet Rheumatol 2021; 3:e185-e194. [PMID: 38279381 DOI: 10.1016/s2665-9913(20)30421-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 11/19/2020] [Accepted: 11/26/2020] [Indexed: 01/09/2023]
Abstract
BACKGROUND Interstitial lung disease (ILD) is the most common cause of death in systemic sclerosis. To date, the progression of systemic sclerosis-associated ILD is judged by the accrual of lung damage on CT and pulmonary function tests. However, diagnostic tools to assess disease activity are not available. Here, we tested the hypothesis that quantification of fibroblast activation by PET-CT using a 68Ga-labelled selective inhibitor of prolyl endopeptidase FAP (68Ga-FAPI-04) would correlate with ILD activity and disease progression in patients with systemic sclerosis-associated ILD. METHODS Between Sept 10, 2018, and April 8, 2020, 21 patients with systemic sclerosis-associated ILD confirmed by high-resolution CT (HRCT) within 12 months of inclusion and with onset of systemic sclerosis-associated ILD within 5 years or signs of progressive ILD and 21 controls without ILD were consecutively enrolled. All participants underwent 68Ga-FAPI-04 PET-CT imaging and standard-of-care procedures, including HRCT and pulmonary function tests at baseline. Patients with systemic sclerosis-associated ILD were followed for 6 months with HRCT and pulmonary function tests. We compared baseline 68Ga-FAPI-04 PET-CT uptake with standard diagnostic tools and predictors of ILD progression. The association of 68Ga-FAPI-04 uptake with changes in forced vital capacity was analysed using mixed-effects models. Follow-up 68Ga-FAPI-04 PET-CT scans were obtained in a subset of patients treated with nintedanib (follow-up between 6-10 months) to assess change over time. FINDINGS 68Ga-FAPI-04 accumulated in fibrotic areas of the lungs in patients with systemic sclerosis-associated ILD compared with controls, with a median standardised uptake value (SUV) mean over the whole lung of 0·80 (IQR 0·60-2·10) in the systemic sclerosis-ILD group and 0·50 (0·40-0·50) in the control group (p<0·0001) and a mean whole lung maximal SUV of 4·40 (range 3·05-5·20) in the systemic sclerosis-ILD group compared with 0·70 (0·65-0·70) in the control group (p<0·0001). Whole-lung FAPI metabolic active volume (wlFAPI-MAV) and whole-lung total lesion FAPI (wlTL-FAPI) were not measurable in control participants, because no 68Ga-FAPI-04 uptake above background level was observed. In the systemic sclerosis-ILD group the median wlFAPI-MAV was 254·00 cm3 (IQR 163·40-442·30), and the median wlTL-FAPI was 183·60 cm3 (98·04-960·70). 68Ga-FAPI-04 uptake was higher in patients with extensive disease, with previous ILD progression, or high EUSTAR activity scores than in those with with limited disease, previously stable ILD, or low EUSTAR activity scores. Increased 68Ga-FAPI-04 uptake at baseline was associated with progression of ILD independently of extent of involvement on HRCT scan and the forced vital capacity at baseline. In consecutive 68Ga-FAPI-04 PET-CTs, changes in 68Ga-FAPI-04 uptake was concordant with the observed response to the fibroblast-targeting antifibrotic drug nintedanib. INTERPRETATION Our study presents the first in-human evidence that fibroblast activation correlates with fibrotic activity and disease progression in the lungs of patients with systemic sclerosis-associated ILD and that 68Ga-FAPI-04 PET-CT might improve risk assessment of systemic sclerosis-associated ILD. FUNDING German Research Foundation, Erlangen Anschubs-und Nachwuchsfinanzierung, Interdisziplinäres Zentrum für Klinische Forschung Erlangen, Bundesministerium für Bildung und Forschung, Deutsche Stiftung Systemische Sklerose, Wilhelm-Sander-Foundation, Else-Kröner-Fresenius-Foundation, European Research Council, Ernst-Jung-Foundation, and Clinician Scientist Program Erlangen.
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Affiliation(s)
- Christina Bergmann
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Jörg H W Distler
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany.
| | - Christoph Treutlein
- Department of Radiology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Koray Tascilar
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Anna-Theresa Müller
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Armin Atzinger
- Department of Nuclear Medicine, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Alexandru-Emil Matei
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Johannes Knitza
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Andrea-Hermina Györfi
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Anja Lück
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Clara Dees
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Alina Soare
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Andreas Ramming
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Verena Schönau
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Oliver Distler
- Rheumaklinik, University Hospital Zurich, Zurich, Switzerland
| | - Olaf Prante
- Department of Nuclear Medicine, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Philipp Ritt
- Department of Nuclear Medicine, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Theresa Ida Götz
- Department of Nuclear Medicine, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Markus Köhner
- Department of Nuclear Medicine, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Michael Cordes
- Department of Nuclear Medicine, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Tobias Bäuerle
- Department of Radiology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Torsten Kuwert
- Department of Nuclear Medicine, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Georg Schett
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Christian Schmidkonz
- Department of Nuclear Medicine, Friedrich-Alexander University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
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Lück A, Klimmasch L, Großmann P, Germerodt S, Kaleta C. Computational Investigation of Environment-Noise Interaction in Single-Cell Organisms: The Merit of Expression Stochasticity Depends on the Quality of Environmental Fluctuations. Sci Rep 2018; 8:333. [PMID: 29321537 PMCID: PMC5762857 DOI: 10.1038/s41598-017-17441-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 11/27/2017] [Indexed: 11/23/2022] Open
Abstract
Organisms need to adapt to changing environments and they do so by using a broad spectrum of strategies. These strategies include finding the right balance between expressing genes before or when they are needed, and adjusting the degree of noise inherent in gene expression. We investigated the interplay between different nutritional environments and the inhabiting organisms’ metabolic and genetic adaptations by applying an evolutionary algorithm to an agent-based model of a concise bacterial metabolism. Our results show that constant environments and rapidly fluctuating environments produce similar adaptations in the organisms, making the predictability of the environment a major factor in determining optimal adaptation. We show that exploitation of expression noise occurs only in some types of fluctuating environment and is strongly dependent on the quality and availability of nutrients: stochasticity is generally detrimental in fluctuating environments and beneficial only at equal periods of nutrient availability and above a threshold environmental richness. Moreover, depending on the availability and nutritional value of nutrients, nutrient-dependent and stochastic expression are both strategies used to deal with environmental changes. Overall, we comprehensively characterize the interplay between the quality and periodicity of an environment and the resulting optimal deterministic and stochastic regulation strategies of nutrient-catabolizing pathways.
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Affiliation(s)
- Anja Lück
- Department of Bioinformatics, Friedrich Schiller University, Jena, 07743, Germany
| | - Lukas Klimmasch
- Research Group Theoretical Systems Biology, Friedrich Schiller University, Jena, 07743, Germany
| | - Peter Großmann
- Department of Bioinformatics, Friedrich Schiller University, Jena, 07743, Germany
| | - Sebastian Germerodt
- Department of Bioinformatics, Friedrich Schiller University, Jena, 07743, Germany
| | - Christoph Kaleta
- Research Group Medical Systems Biology, Institute for Experimental Medicine, Christian-Albrechts-University, Kiel, 24105, Germany.
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Großmann P, Lück A, Kaleta C. Model-based genome-wide determination of RNA chain elongation rates in Escherichia coli. Sci Rep 2017; 7:17213. [PMID: 29222445 PMCID: PMC5722913 DOI: 10.1038/s41598-017-17408-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 07/17/2017] [Accepted: 11/24/2017] [Indexed: 11/17/2022] Open
Abstract
Dynamics in the process of transcription are often simplified, yet they play an important role in transcript folding, translation into functional protein and DNA supercoiling. While the modulation of the speed of transcription of individual genes and its role in regulation and proper protein folding has been analyzed in depth, the functional relevance of differences in transcription speeds as well as the factors influencing it have not yet been determined on a genome-wide scale. Here we determined transcription speeds for the majority of E. coli genes based on experimental data. We find large differences in transcription speed between individual genes and a strong influence of both cellular location as well as the relative importance of genes for cellular function on transcription speeds. Investigating factors influencing transcription speeds we observe both codon composition as well as factors associated to DNA topology as most important factors influencing transcription speeds. Moreover, we show that differences in transcription speeds are sufficient to explain the timing of regulatory responses during environmental shifts and highlight the importance of the consideration of transcription speeds in the design of experiments measuring transcriptomic responses to perturbations.
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Affiliation(s)
- Peter Großmann
- Research Group Theoretical Systems Biology, Friedrich-Schiller-University Jena, Ernst-Abbe-Platz 2, 07747, Jena, Germany
| | - Anja Lück
- Research Group Theoretical Systems Biology, Friedrich-Schiller-University Jena, Ernst-Abbe-Platz 2, 07747, Jena, Germany
| | - Christoph Kaleta
- Research Group Medical Systems Biology, c/o Transfusionsmedizin, Institut für Experimentelle Medizin, Christian-Albrechts-University Kiel, Michaelis-Straße 5, Haus 17, 24105, Kiel, Germany.
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Germerodt S, Bohl K, Lück A, Pande S, Schröter A, Kaleta C, Schuster S, Kost C. Pervasive Selection for Cooperative Cross-Feeding in Bacterial Communities. PLoS Comput Biol 2016; 12:e1004986. [PMID: 27314840 PMCID: PMC4912067 DOI: 10.1371/journal.pcbi.1004986] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 05/16/2016] [Indexed: 11/21/2022] Open
Abstract
Bacterial communities are taxonomically highly diverse, yet the mechanisms that maintain this diversity remain poorly understood. We hypothesized that an obligate and mutual exchange of metabolites, as is very common among bacterial cells, could stabilize different genotypes within microbial communities. To test this, we developed a cellular automaton to model interactions among six empirically characterized genotypes that differ in their ability and propensity to produce amino acids. By systematically varying intrinsic (i.e. benefit-to-cost ratio) and extrinsic parameters (i.e. metabolite diffusion level, environmental amino acid availability), we show that obligate cross-feeding of essential metabolites is selected for under a broad range of conditions. In spatially structured environments, positive assortment among cross-feeders resulted in the formation of cooperative clusters, which limited exploitation by non-producing auxotrophs, yet allowed them to persist at the clusters' periphery. Strikingly, cross-feeding helped to maintain genotypic diversity within populations, while amino acid supplementation to the environment decoupled obligate interactions and favored auxotrophic cells that saved amino acid production costs over metabolically autonomous prototrophs. Together, our results suggest that spatially structured environments and limited nutrient availabilities should facilitate the evolution of metabolic interactions, which can help to maintain genotypic diversity within natural microbial populations.
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Affiliation(s)
| | - Katrin Bohl
- Department of Bioinformatics, Friedrich Schiller University Jena, Germany
- Research Group Theoretical Systems Biology, Friedrich Schiller University Jena, Germany
| | - Anja Lück
- Department of Bioinformatics, Friedrich Schiller University Jena, Germany
- Research Group Theoretical Systems Biology, Friedrich Schiller University Jena, Germany
| | - Samay Pande
- Experimental Ecology and Evolution Research Group, Department of Bioorganic Chemistry, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Anja Schröter
- Department of Bioinformatics, Friedrich Schiller University Jena, Germany
| | - Christoph Kaleta
- Research Group Theoretical Systems Biology, Friedrich Schiller University Jena, Germany
- Research Group Medical Systems Biology, Institute for Experimental Medicine, Christian-Albrechts-University Kiel, Germany
| | - Stefan Schuster
- Department of Bioinformatics, Friedrich Schiller University Jena, Germany
| | - Christian Kost
- Experimental Ecology and Evolution Research Group, Department of Bioorganic Chemistry, Max Planck Institute for Chemical Ecology, Jena, Germany
- Department of Ecology and Evolution, School of Biology/Chemistry, Osnabrück University, Germany
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Nolte F, Höchsmann B, Lübbert M, Platzbecker U, Haase D, Lück A, Gattermann N, Giagounidis A, Leismann O, Junkes A, Schumann C, Hofmann WK, Schrezenmeier H. 347 Successful treatment of transfusional iron overload in MDS patients with deferasirox as indicated by Liver-MRI: A German, multi-center trial. Leuk Res 2011. [DOI: 10.1016/s0145-2126(11)70349-6] [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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Wittmer IK, Bader HP, Scheidegger R, Singer H, Lück A, Hanke I, Carlsson C, Stamm C. Significance of urban and agricultural land use for biocide and pesticide dynamics in surface waters. Water Res 2010; 44:2850-62. [PMID: 20188390 DOI: 10.1016/j.watres.2010.01.030] [Citation(s) in RCA: 149] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2009] [Revised: 01/07/2010] [Accepted: 01/26/2010] [Indexed: 05/18/2023]
Abstract
Biocides and pesticides are designed to control the occurrence of unwanted organisms. From their point of application, these substances can be mobilized and transported to surface waters posing a threat to the aquatic environment. Historically, agricultural pesticides have received substantially more attention than biocidal compounds from urban use, despite being used in similar quantities. This study aims at improving our understanding of the influence of mixed urban and agricultural land use on the overall concentration dynamics of biocides and pesticides during rain events throughout the year. A comprehensive field study was conducted in a catchment within the Swiss plateau (25 km(2)). Four surface water sampling sites represented varying combinations of urban and agricultural sources. Additionally, the urban drainage system was studied by sampling the only wastewater treatment plant (WWTP) in the catchment, a combined sewer overflow (CSO), and a storm sewer (SS). High temporal resolution sampling was carried out during rain events from March to November 2007. The results, based on more than 600 samples analyzed for 23 substances, revealed distinct and complex concentration patterns for different compounds and sources. Five types of concentration patterns can be distinguished: a) compounds that showed elevated background concentrations throughout the year (e.g. diazinon >50 ng L(-1)), indicating a constant household source; b) compounds that showed elevated concentrations driven by rain events throughout the year (e.g. diuron 100-300 ng L(-1)), indicating a constant urban outdoor source such as facades; c) compounds with seasonal peak concentrations driven by rain events from urban and agricultural areas (e.g. mecoprop 1600 ng L(-1) and atrazine 2500 ng L(-1) respectively); d) compounds that showed unpredictably sharp peaks (e.g. atrazine 10,000 ng L(-1), diazinon 2500 ng L(-1)), which were most probably due to improper handling or even disposal of products; and finally, e) compounds that were used in high amounts but were not detected in surface waters (e.g. isothiazolinones). It can be safely concluded that in catchments of mixed land use, the contributions of biocide and pesticide inputs into surface waters from urban areas are at least as important as those from agricultural areas.
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Affiliation(s)
- I K Wittmer
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland.
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Mentzel F, Augstein P, Hille W, Lück A, Salzsieder E, Vogt L. TeleMotiv – eHealth Behavior Management Model zur Motivation von Diabetikern. DIABETOL STOFFWECHS 2006. [DOI: 10.1055/s-2006-943985] [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: 10/19/2022]
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Casper J, Wilhelm S, Steiner B, Wolff D, Grobe N, Hähling D, Hartung G, Hilgendorf I, Lück A, Junghanss C, Kahl C, Baumgart J, Pichlmeier U, Freund M. Allogene Blutstammzelltransplantation von Risikopatienten nach Konditionierung mit Treosulfan und Fludarabin. Dtsch Med Wochenschr 2005; 130:2125-9. [PMID: 16172951 DOI: 10.1055/s-2005-916351] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND AND OBJECTIVE Allogeneic transplantation can not be offered to many patients due to potential side-effects of conventional conditioning. Dose-reduced conditioning approaches improve tolerability, however, treatment efficacy may be reduced as well. We have, therefore, developed a dose intense but toxicity reduced conditioning regimen based on treosulfan and fludarabine and report first results. PATIENTS AND METHODS 65 patients with a median age of 50 years were transplanted from related (n = 21) or unrelated donors (n = 44) after conditioning with treosulfan (3 x 10, 3 x 12 or 3 x 14 g/m(2) i. v.) and fludarabine (5 x 30 mg/m(2) i. v.). 21 patients were in complete remission (CR) and 44 patients had not reached a CR at the time of transplantation. 59 of 65 patients were considered unfit for a conventional conditioning regimen. RESULTS The actuarial overall survival after 3 years is 59.2 %, the event-free survival 40.1 %. Patients with a related donor or transplantation in CR had a better overall (85.4 resp. 74.2 %) and event-free survival (52.2 % resp. 61.9 %). The cumulative incidence of relapse at 3 years was 26.2 %. Non-relapse mortality at day 100 is 17.4 % (cumulative incidence). In stepwise Cox regression analyses for overall survival, event-free survival and non-relapse mortality the covariables transplantation in CR vs. not in CR and the donor status were shown to be influential. CONCLUSIONS These results with a conditioning therapy of treosulfan and fludarabine indicate that patients despite higher age, concomitant disease or after intensive pretreatment can be successfully transplanted without increased treatment-related mortality.
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Affiliation(s)
- J Casper
- Abteilung Hämatologie und Onkologie der Medizinischen Fakultät der Universität Rostock.
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Sterzik K, Abt M, Lück A, Strehler E. Does Cigarette Smoking in Subfertile Male Patients Impair Fertilization Rates in IVF Cycles? Fertil Steril 2000. [DOI: 10.1016/s0015-0282(00)01016-5] [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: 10/18/2022]
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Abstract
The tail muscle of the lobster Homarus americanus contains an actin-binding protein with an apparent molecular mass of 105 kDa determined by SDS/PAGE and gelsolin-like properties. We isolated this protein and peptide sequences were obtained after limited proteolysis with chymotrypsin. A tail-muscle-specific cDNA library was constructed in a lambda expression vector and a full-length clone was obtained by screening with a polyclonal anti-(crustacean gelsolin) antibody. The cDNA insert of approx. 3.2 kb length was sequenced. The cDNA contained an open reading frame of 2.265 kb, and the deduced amino acid sequence of 754 residues (83,469 Da) identified the protein as a cytoplasmic member of the gelsolin/villin protein family. Comparison of the lobster gelsolin amino acid sequence with other members of this protein family revealed the characteristic 6-fold repeated segmental structure as well as the three conserved sequence motifs typical of each segment [Way and Weeds (1988) J. Mol. Biol. 203, 1127-1133]. Strong homologies were found with Drosophila gelsolin, human gelsolin, villin core, Dictyostelium severin and Physarum fragmin. In addition, the gelsolin-like protein from lobster muscle revealed motifs that were clearly similar to the actin-bundling region of human villin headpiece although it did not itself contain a distinct headpiece domain. The recombinant lobster gelsolin-like protein, expressed in Escherichia coli as a fusion protein, was purified from inclusion bodies and renatured as a functional protein. There were no significant differences in the biological activity tested between the recombinant and the native protein isolated from lobster muscle.
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Affiliation(s)
- A Lück
- Biochemical Cell Biology Group, University of Bielefeld, Federal Republic of Germany
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Silberklang M, RajBhandary UL, Lück A, Erdmann VA. Chemical reactivity of E. coli 5S RNA in situ in the 50S ribosomal subunit. Nucleic Acids Res 1983; 11:605-17. [PMID: 6340064 PMCID: PMC325740 DOI: 10.1093/nar/11.3.605] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
E. coli 50S ribosomal subunits were reacted with monoperphthalic acid under conditions in which non-base paired adenines are modified to their 1-N-oxides. 5S RNA was isolated from such chemically reacted subunits and the two modified adenines were identified as A73 and A99. The modified 5S RNA, when used in reconstitution of 50S subunits, yielded particles with reduced biological activity (50%). The results are discussed with respect to a recently proposed three-dimensional structure for 5S RNA, the interaction of the RNA with proteins E-L5, E-L18 and E-L25 and previously proposed interactions of 5S RNA with tRNA, 16S and 23S ribosomal RNAs.
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