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Ibstedt S, de Mattos CBR, Köster J, Mertens F. A cryptic EWSR1::DDIT3 fusion in myxoid liposarcoma: Potential pitfalls with FISH and cytogenetics. Genes Chromosomes Cancer 2023; 62:167-170. [PMID: 36379683 PMCID: PMC10100227 DOI: 10.1002/gcc.23103] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/07/2022] [Accepted: 11/11/2022] [Indexed: 11/17/2022] Open
Abstract
Myxoid liposarcoma (MLS) is molecularly characterized by fusions involving the DDIT3 gene in chromosome band 12q13; the fusion partner is FUS in band 16p11 in 90-95% of the cases and EWSR1 in band 22q12 in the remaining 5-10%. Hence, molecular studies, often fluorescence in situ hybridization (FISH) for DDIT3 rearrangement, are useful for establishing a correct diagnosis. Although all MLS tumors should have DDIT3 fusions, it is important to be aware of reasons for potential false-negative results. We here present a case of MLS that was negative for FISH for DDIT3, that showed an unexpected t(11;22) at G-banding, but that displayed a characteristic EWSR1::DDIT3 fusion at RNA-sequencing. The results suggest that neoplasia-associated fusions that, due to the transcriptional orientations of the two genes involved, cannot arise through only two double-strand breaks are more likely to be associated with negative FISH-findings and unexpected karyotypes.
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Affiliation(s)
- Sebastian Ibstedt
- Department of Clinical Genetics and Pathology, Division of Laboratory Medicine, Lund, Sweden
| | | | - Jan Köster
- Department of Clinical Genetics and Pathology, Division of Laboratory Medicine, Lund, Sweden.,Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Fredrik Mertens
- Department of Clinical Genetics and Pathology, Division of Laboratory Medicine, Lund, Sweden.,Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden
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Köster J, Ghanei I, Domanski HA. Comparative cytological and histological assessment of 828 primary soft tissue and bone lesions, and proposal for a system for reporting soft tissue cytopathology. Cytopathology 2020; 32:7-19. [PMID: 32926591 PMCID: PMC7821273 DOI: 10.1111/cyt.12914] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 08/06/2020] [Accepted: 09/07/2020] [Indexed: 12/13/2022]
Abstract
Introduction The aim of the study was to evaluate the diagnostic utility of fine needle aspiration (FNA) cytology and core needle biopsies (CNBs) in a series of primary soft tissue and bone lesions and to test a possible system for reporting results of FNA cytology of soft tissue lesion. Methods This retrospective study encompassed 828 primary soft tissue and bone lesions, analysed with FNA, CNB and/or surgical specimen in order to perform sensitivity/specificity as well as accuracy analyses. The series was then used to test a system for reporting soft tissue cytopathology with six categories and the risk of malignancy in each category was calculated. Results With a malignant diagnosis defined as positive test result, FNA and CNB analysis showed sensitivity of 87% and 94%, respectively, and specificity of 89% and 95%, respectively. FNA and CNB analyses identified the correct histopathological entity of the examined lesion in 55% and 66%, respectively. The risk of malignancy within the tested categories was non‐diagnostic 42%, non‐neoplastic 0%, atypia of unknown significance 46%, neoplasm benign 3%, neoplasm of unknown malignant potential 27%, suspicious for malignancy 72% and malignant 97%. Conclusion FNA cytology is a suitable tool to determine the malignant potential of a sampled soft tissue/bone lesion but is inferior to CNB in defining the correct entity. A standardised reporting system might improve the clinical management of patients with soft tissue tumours examined primarily by FNA cytology. The study evaluated the diagnostic utility of fine needle aspiration cytology and core needle biopsies in 828 primary soft tissue and bone lesions. In a second step, a possible system for reporting results of fine needle aspiration cytology of soft tissue lesion was tested.
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Affiliation(s)
- Jan Köster
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden.,Division of Laboratory Medicine, Department of Clinical Genetics and Pathology, Skåne University Hospital, Lund, Sweden
| | - Iman Ghanei
- Department of Orthopedics, Skåne University Hospital, Lund, Sweden
| | - Henryk A Domanski
- Division of Laboratory Medicine, Department of Clinical Genetics and Pathology, Skåne University Hospital, Lund, Sweden
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3
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Köster J, Arbajian E, Viklund B, Isaksson A, Hofvander J, Haglund F, Bauer H, Magnusson L, Mandahl N, Mertens F. Genomic and transcriptomic features of dermatofibrosarcoma protuberans: Unusual chromosomal origin of the COL1A1-PDGFB fusion gene and synergistic effects of amplified regions in tumor development. Cancer Genet 2019; 241:34-41. [PMID: 31870844 DOI: 10.1016/j.cancergen.2019.12.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 06/20/2019] [Revised: 11/06/2019] [Accepted: 12/06/2019] [Indexed: 12/11/2022]
Abstract
The dermatofibrosarcoma protuberans family of tumors (DPFT) comprises cutaneous soft tissue neoplasms associated with aberrant PDGFBR signaling, typically through a COL1A1-PDGFB fusion. The aim of the present study was to obtain a better understanding of the chromosomal origin of this fusion and to assess the spectrum of secondary mutations at the chromosome and nucleotide levels. We thus investigated 42 tumor samples from 35 patients using chromosome banding, fluorescence in situ hybridization, single nucleotide polymorphism arrays, and/or massively parallel sequencing (gene panel, whole exome and transcriptome sequencing) methods. We confirmed the age-associated differences in the origin of the COL1A1-PDGFB fusion and could show that it in most cases must arise after DNA synthesis, i.e., in the S or G2 phase of the cell cycle. Whereas there was a non-random pattern of secondary chromosomal rearrangements, single nucleotide variants seem to have little impact on tumor progression. No clear genomic differences between low-grade and high-grade DPFT were found, but the number of chromosomes and chromosomal imbalances as well as the frequency of 9p deletions all tended to be greater among the latter. Gene expression profiling of tumors with COL1A1-PDGFB fusions associated with unbalanced translocations or ring chromosomes identified several transcriptionally up-regulated genes in the amplified regions of chromosomes 17 and 22, including TBX2, PRKCA, MSI2, SOX9, SOX10, and PRAME.
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Affiliation(s)
- Jan Köster
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden; Department of Clinical Genetics and Pathology, Division of Laboratory Medicine, Lund, Sweden.
| | - Elsa Arbajian
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Björn Viklund
- Science for Life Laboratory, Department of Medical Sciences, Uppsala University, Sweden
| | - Anders Isaksson
- Science for Life Laboratory, Department of Medical Sciences, Uppsala University, Sweden
| | - Jakob Hofvander
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Felix Haglund
- Department of Pathology and Cytology, Karolinska University Hospital, Stockholm, Sweden
| | - Henrik Bauer
- Department of Orthopedics, Karolinska University Hospital, Stockholm, Sweden
| | - Linda Magnusson
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Nils Mandahl
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Fredrik Mertens
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden; Department of Clinical Genetics and Pathology, Division of Laboratory Medicine, Lund, Sweden
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Wiesweg M, Mairinger F, Reis H, Goetz M, Walter RFH, Hager T, Metzenmacher M, Eberhardt WEE, McCutcheon A, Köster J, Stuschke M, Aigner C, Darwiche K, Schmid KW, Rahmann S, Schuler M. Machine learning-based predictors for immune checkpoint inhibitor therapy of non-small-cell lung cancer. Ann Oncol 2019; 30:655-657. [PMID: 30753264 DOI: 10.1093/annonc/mdz049] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- M Wiesweg
- Department of Medical Oncology, West German Cancer Center; Division of Thoracic Oncology, Ruhrlandklinik; Genome Informatics, Institute of Human Genetics
| | - F Mairinger
- Institute of Pathology, West German Cancer Center
| | - H Reis
- Institute of Pathology, West German Cancer Center
| | - M Goetz
- Institute of Pathology, West German Cancer Center
| | - R F H Walter
- Institute of Pathology, West German Cancer Center
| | - T Hager
- Institute of Pathology, West German Cancer Center
| | - M Metzenmacher
- Department of Medical Oncology, West German Cancer Center
| | - W E E Eberhardt
- Department of Medical Oncology, West German Cancer Center; Division of Thoracic Oncology, Ruhrlandklinik
| | - A McCutcheon
- Department of Medical Oncology, West German Cancer Center
| | - J Köster
- Genome Informatics, Institute of Human Genetics
| | - M Stuschke
- Department of Radiotherapy, West German Cancer Center
| | - C Aigner
- Department of Thoracic Surgery and Endoscopy, Ruhrlandklinik
| | - K Darwiche
- Department of Pulmonary Medicine, Section of Interventional Pneumology, Ruhrlandklinik - University Hospital Essen, University Duisburg-Essen, Essen
| | - K W Schmid
- Institute of Pathology, West German Cancer Center; German Cancer Consortium (DKTK), Partner site University Hospital Essen, Essen, Germany
| | - S Rahmann
- Genome Informatics, Institute of Human Genetics
| | - M Schuler
- Department of Medical Oncology, West German Cancer Center; Division of Thoracic Oncology, Ruhrlandklinik; German Cancer Consortium (DKTK), Partner site University Hospital Essen, Essen, Germany.
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Arbajian E, Köster J, Vult von Steyern F, Mertens F. Inflammatory leiomyosarcoma is a distinct tumor characterized by near-haploidization, few somatic mutations, and a primitive myogenic gene expression signature. Mod Pathol 2018; 31:93-100. [PMID: 28884746 DOI: 10.1038/modpathol.2017.113] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 06/30/2017] [Accepted: 06/30/2017] [Indexed: 12/28/2022]
Abstract
Inflammatory leiomyosarcoma is a soft-tissue tumor resembling conventional leiomyosarcoma, but with a prominent intrinsic inflammatory component. Previous studies have suggested that inflammatory leiomyosarcoma differs genetically from leiomyosarcoma, but in-depth analyses are lacking. Here we provide a comprehensive picture of the genome and transcriptome of inflammatory leiomyosarcoma by combining cytogenetic, single-nucleotide polymorphism array, mRNA-sequencing, and whole-exome sequencing data. The results show that inflammatory leiomyosarcoma has a specific genetic profile characterized by near-haploidization with or without subsequent whole-genome doubling. Consistently, both parental copies of chromosomes 5 and 22 are preserved. Apart from recurrent mutation of the NF1 gene, additional somatic events that could serve as driver mutations were not found at either the nucleotide or the genome level. Furthermore, no fusion transcripts were identified. Global gene expression profiling revealed particularly prominent differential expression of genes, including ITGA7, MYF5, MYF6, MYOD1, MYOG, and PAX7, involved in muscle development and function, providing strong argument for grouping inflammatory leiomyosarcoma with myogenic sarcomas, rather than with myofibroblastic lesions. Combined with previously published data, there are now 10 cases of inflammatory leiomyosarcoma with confirmed near-haploid genotype. These patients differ from leiomyosarcoma patients in being younger (median 41 years), showing a male predominance (9:1), and few relapses (1 of 8 informative patients). Thus, the clinical, morphological, and genetic data provide compelling support for inflammatory leiomyosarcoma being a distinct subtype of myogenic tumors.
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Affiliation(s)
- Elsa Arbajian
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Jan Köster
- Department of Pathology, Skåne University Hospital, Lund, Sweden
| | - Fredrik Vult von Steyern
- Department of Orthopedics and Clinical Sciences, Lund University and Skåne University Hospital, Lund, Sweden
| | - Fredrik Mertens
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden
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Köster J, Hoffmann G, Bockisch FJ, Kreimeier P, Köster JR, Feige K. Lying behaviour of horses depending on the bedding material in individual housing in boxes with or without adjacent pen. PFERDEHEILKUNDE 2017. [DOI: 10.21836/pem20170106] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Franzen K, Reppel M, Köster J, Mortensen K. Acute and chronic effects on central hemodynamics and arterial stiffness in professional rowers. Physiol Meas 2016; 37:544-53. [PMID: 26999470 DOI: 10.1088/0967-3334/37/4/544] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Controversial data exist on acute and chronic effects of competitive sports on central hemodynamics and arterial stiffness. We investigated chronic as well as acute training effects in professional rowers. The trial was planned as a non-randomized, controlled pilot-study comparing athletes and controls. 13 German national team rowers (24.1 ± 1.5 years) and 12 controls (23.8 ± 0.8 years) participated. Aortic, brachial hemodynamics and arterial stiffness were measured (Arteriograph, TensioMed(®), Hungary) before and after a standardized exercise test. Chronic heart rate (49 [Formula: see text] 2 bpm versus 70 [Formula: see text] 2 bpm, p < 0.05) as well as brachial diastolic pressure (65 [Formula: see text] 2 mmHg versus 74 [Formula: see text] 2 mmHg, p < 0.05) was significantly lower in rowers. Physical power (305 [Formula: see text] 63 versus 158 [Formula: see text] 60 W, p < 0.001) was better. Chronic aortic pulse pressure (41.6 [Formula: see text] 6.0 versus 35.2 [Formula: see text] 3.8 mmHg; p < 0.01) and AIx (9.1 [Formula: see text] 5.4 versus 7.0 [Formula: see text] 10.2; p < 0.01) were significantly higher in athletes. After the all-out test (acute effects) pulse wave velocity (rowers: 6.6 [Formula: see text] 1.2 m s(-1) versus 7.8 [Formula: see text] 1.6 m s(-1), p < 0.001; control group 6.0 [Formula: see text] 0.4 m s(-1) versus 8.0 [Formula: see text] 1.4 m s(-1), p = 0.005) and heart rate (rowers: 49 [Formula: see text] 2 bpm versus 91 [Formula: see text] 3 bpm, p < 0.001; control group 70 [Formula: see text] 2 bpm versus 92 [Formula: see text] 4 bpm, p < 0.001) increased significantly in both groups. The controls' aortic AIx (7.0 [Formula: see text] 10.2 versus 2.0 [Formula: see text] 6.0; p < 0.01) decreased significantly after exercise. Professional rowers showed higher chronic aortic pulse pressure and arterial stiffness. Given the risk associated with elevated aortic pulse pressure and AIx for development of cardiovascular diseases, longterm observations of professional rowers are needed with respect to arterial stiffness and prognosis. Furthermore the acute effects need additional research.
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Affiliation(s)
- K Franzen
- Medical Clinic III, Campus Luebeck, University Hospital Schleswig-Holstein, Luebeck, Germany
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Stern E, Mortensen K, Franzen K, Köster J, Reichert D, Dalhoff K, Weil J, Drömann D, Reppel M. Arterielle Gefäßsteifigkeit bei pulmonaler Hypertonie. Pneumologie 2013. [DOI: 10.1055/s-0033-1344704] [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: 10/25/2022]
Affiliation(s)
- E. Stern
- Medizinische Klinik 2, Universitätsklinikum Schleswig-Holstein, Campus Lübeck
| | - K. Mortensen
- Medizinische Klinik 2, Universitätsklinikum Schleswig-Holstein, Campus Lübeck
| | - K. Franzen
- Medizinische Klinik 2, Universitätsklinikum Schleswig-Holstein, Campus Lübeck
| | - J. Köster
- Medizinische Klinik 2, Universitätsklinikum Schleswig-Holstein, Campus Lübeck
| | - D. Reichert
- Medizinische Klinik 2, Universitätsklinikum Schleswig-Holstein, Campus Lübeck
| | - K. Dalhoff
- Medizinische Klinik 3, Universitätsklinikum Schleswig-Holstein, Campus Lübeck
| | - J. Weil
- Medizinische Klinik 2, Universitätsklinikum Schleswig-Holstein, Campus Lübeck
| | - D. Drömann
- Medizinische Klinik 3, Universitätsklinikum Schleswig-Holstein, Campus Lübeck
| | - M. Reppel
- Medizinische Klinik 2, Universitätsklinikum Schleswig-Holstein, Campus Lübeck
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Schramm A, Schowe B, Fielitz K, Heilmann M, Martin M, Marschall T, Köster J, Vandesompele J, Vermeulen J, de Preter K, Koster J, Versteeg R, Noguera R, Speleman F, Rahmann S, Eggert A, Morik K, Schulte JH. Exon-level expression analyses identify MYCN and NTRK1 as major determinants of alternative exon usage and robustly predict primary neuroblastoma outcome. Br J Cancer 2012; 107:1409-17. [PMID: 23047593 PMCID: PMC3494449 DOI: 10.1038/bjc.2012.391] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [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] [Indexed: 11/15/2022] Open
Abstract
Background: Using mRNA expression-derived signatures as predictors of individual patient outcome has been a goal ever since the introduction of microarrays. Here, we addressed whether analyses of tumour mRNA at the exon level can improve on the predictive power and classification accuracy of gene-based expression profiles using neuroblastoma as a model. Methods: In a patient cohort comprising 113 primary neuroblastoma specimens expression profiling using exon-level analyses was performed to define predictive signatures using various machine-learning techniques. Alternative transcript use was calculated from relative exon expression. Validation of alternative transcripts was achieved using qPCR- and cell-based approaches. Results: Both predictors derived from the gene or the exon levels resulted in prediction accuracies >80% for both event-free and overall survival and proved as independent prognostic markers in multivariate analyses. Alternative transcript use was most prominently linked to the amplification status of the MYCN oncogene, expression of the TrkA/NTRK1 neurotrophin receptor and survival. Conclusion: As exon level-based prediction yields comparable, but not significantly better, prediction accuracy than gene expression-based predictors, gene-based assays seem to be sufficiently precise for predicting outcome of neuroblastoma patients. However, exon-level analyses provide added knowledge by identifying alternative transcript use, which should deepen the understanding of neuroblastoma biology.
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Affiliation(s)
- A Schramm
- University Hospital Essen, Childrens Hospital, Department of Hematology/Oncology, Germany.
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Micić V, Kruge MA, Köster J, Hofmann T. Natural, anthropogenic and fossil organic matter in river sediments and suspended particulate matter: a multi-molecular marker approach. Sci Total Environ 2011; 409:905-919. [PMID: 21168898 DOI: 10.1016/j.scitotenv.2010.11.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Revised: 11/03/2010] [Accepted: 11/09/2010] [Indexed: 05/30/2023]
Abstract
Different classes of organic matter (OM) have been systematically investigated in sediments and suspended particulate matter (SPM) along the Danube River in order to understand causes of compositional changes. Analytical pyrolysis revealed the dominance of natural organic matter (NOM) in most of the samples. The predominance of aquatic biomass is evident mainly from the abundance of organonitrogen compounds and phenol distributions. As the river enters a forested gorge, the terrestrial component of the NOM in sediments is more significant. This is reflected in abundant methoxyphenols and a very high carbon preference index. SPM sample from a tributary shows a unique geochemical signature. It contains abundant carboxylic acids, amines, isoprenoids in the pyrolyzate, and is dominated by phytol and 24-methyl-cholesta-5,24(28)-dien-3β-ol in the extract, produced by a diatom bloom. Wax esters with a relatively high proportion of short, methyl-branched alkyl-chains appear together with abundant phytadienes and n-C(17) alkane in some samples, suggesting a microbial origin. Anthropogenic OM from runoff and atmospheric deposition was evident from a minor input of polycyclic aromatic hydrocarbons (PAHs) originating from mixed combustion sources. Multivariate analysis using PAH data led us to define simple molecular ratios to distinguish the PAH composition in sand and silty sediments. The newly defined ratios are the alkylated phenanthrenes and anthracenes ratio (APA; C(1)-C(3)/C(0)-C(3) phenanthrenes and anthracenes) and the PAH ring number ratio (RN; 5-6 ring parent PAHs/all parent PAHs). This demonstrates that alkylated, as well as 5-6 ring PAHs are better preserved in the finer than in coarser grained sediments. A ubiquitous, but minor input of petroleum-related contamination with a uniform composition was evident in all samples as revealed by the analysis of petroleum biomarkers. This study demonstrates that the investigation of different classes of riverine OM requires a detailed molecular analysis, applying a series of analytical techniques and adequate statistical data treatment.
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Affiliation(s)
- V Micić
- Department of Environmental Geosciences, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
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Reinartz A, Ehling J, Franz S, Simon V, Bravo IG, Tessmer C, Zentgraf H, Lyer S, Schneider U, Köster J, Raupach K, Kämmerer E, Klaus C, Tischendorf JJW, Kopitz J, Alonso A, Gassler N. Small intestinal mucosa expression of putative chaperone fls485. BMC Gastroenterol 2010; 10:27. [PMID: 20205943 PMCID: PMC2838759 DOI: 10.1186/1471-230x-10-27] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2009] [Accepted: 03/07/2010] [Indexed: 12/01/2022] Open
Abstract
Background Maturation of enterocytes along the small intestinal crypt-villus axis is associated with significant changes in gene expression profiles. fls485 coding a putative chaperone protein has been recently suggested as a gene involved in this process. The aim of the present study was to analyze fls485 expression in human small intestinal mucosa. Methods fls485 expression in purified normal or intestinal mucosa affected with celiac disease was investigated with a molecular approach including qRT-PCR, Western blotting, and expression strategies. Molecular data were corroborated with several in situ techniques and usage of newly synthesized mouse monoclonal antibodies. Results fls485 mRNA expression was preferentially found in enterocytes and chromaffine cells of human intestinal mucosa as well as in several cell lines including Rko, Lovo, and CaCo2 cells. Western blot analysis with our new anti-fls485 antibodies revealed at least two fls485 proteins. In a functional CaCo2 model, an increase in fls485 expression was paralleled by cellular maturation stage. Immunohistochemistry demonstrated fls485 as a cytosolic protein with a slightly increasing expression gradient along the crypt-villus axis which was impaired in celiac disease Marsh IIIa-c. Conclusions Expression and synthesis of fls485 are found in surface lining epithelia of normal human intestinal mucosa and deriving epithelial cell lines. An interdependence of enterocyte differentiation along the crypt-villus axis and fls485 chaperone activity might be possible.
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Affiliation(s)
- Andrea Reinartz
- Institute of Pathology, RWTH Aachen University, Aachen, Germany
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Gaisa NT, Köster J, Reinartz A, Ertmer K, Ehling J, Raupach K, Perez-Bouza A, Knüchel R, Gassler N. Expression of acyl-CoA synthetase 5 in human epidermis. Histol Histopathol 2008; 23:451-8. [PMID: 18228202 DOI: 10.14670/hh-23.451] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The human epidermis is characterized by a constant renewal of keratinocytes embedded in a matrix enriched with lipids. Numerous proteins involved in lipid metabolism are found in human epidermis, especially in keratinocytes. Long-chain acyl-CoA derivatives, which are catalyzed by human ACSL5, are important metabolites in several biochemical pathways, including ceramide de novo synthesis. The aim of the present study was to investigate expression of acyl-CoA synthetase isoform 5 (ACSL5) in human epidermis by an in situ, as well as a molecular approach. We show that ACSL5 mRNA and protein are found in human epidermis, as well as in non-differentiated and differentiated HaCaT cells. Keratinocytes of stratum spinosum are the main source for ACSL5 expression in both meshed facial or abdominal skin and ridged skin of upper or lower extremities including TUNEL-positive cells in upper cellular layers. Single keratinocytes of chronic solar-exposed meshed facial epidermis occasionally display a stronger ACSL5 immunostaining. In conclusion, our study indicates that epidermal ACSL5 expression might be involved in differentiation and the stress response of keratinocytes.
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Affiliation(s)
- N T Gaisa
- RWTH Aachen University, Institute of Pathology, Aachen, Germany
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Barone P, Goetz C, Houben J, Köster J, Leentjens A, Pöwe W, Rascol O, Reichmann H, Schapira A, Tolosa E. 1.167 PRODEST – Depressive symptoms in Parkinson's disease: Pattern across scales. Parkinsonism Relat Disord 2007. [DOI: 10.1016/s1353-8020(08)70439-5] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Corbin A, Köster J. 2.231 Maintained pramipexole monotherapy treatment results in significantly lower dyskinesia rates in early Parkinson's disease: A result of the CALM-PD study after 4 years. Parkinsonism Relat Disord 2007. [DOI: 10.1016/s1353-8020(08)70642-4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Högl B, Lainey E, Albrecht S, Köster J. 1.289 Dose adjustment during long-term pramipexole treatment for restless legs syndrome. Parkinsonism Relat Disord 2007. [DOI: 10.1016/s1353-8020(08)70524-8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Möller C, Eisensehr I, Köster J, Kohnen R. 1.287 Effectiveness of pramipexole in the treatment of RLS: A 12-weeks non-interventional trial in patients with primary restless legs syndrome (RLS). Parkinsonism Relat Disord 2007. [DOI: 10.1016/s1353-8020(08)70522-4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zesiewicz T, Köster J, Albrecht S, Lainey E. 1.292 Beneficial impact of pramipexole on social functioning in patients with restless legs syndrome. Parkinsonism Relat Disord 2007. [DOI: 10.1016/s1353-8020(08)70527-3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Reichmann H, Odin P, Brecht HM, Köster J, Kraus PH. Changing dopamine agonist treatment in Parkinson's disease: experiences with switching to pramipexole. J Neural Transm Suppl 2006:17-25. [PMID: 17447411 DOI: 10.1007/978-3-211-33328-0_2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
1202 patients suffering from Parkinson's disease switched from other dopamine agonists to pramipexole under open conditions either abruptly or in an overlapping, gradual manner. Mostly insufficient effectiveness motivated the switch. The investigators gave equal preference to either an abrupt or an overlapping switch to pramipexole in this observational study. There was a tendency in favour of the overlapping switch procedure in those patients who were on a relatively higher dose of a dopamine agonist before the switch. The switch was performed because the investigators expected the effect of pramipexole on tremor, motor functions and depression/anhedonia to be better compared with previous dopamine agonists. The main reasons for switching to pramipexole (anti-tremor effect, anti-depressive/anti-anhedonic effect) as given by the physicians at baseline came up to expectations. The switch to pramipexole mostly yielded further improvements irrespective of the mode of switching.
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Affiliation(s)
- H Reichmann
- Department of Neurology, Technical University of Dresden, Dresden, Germany.
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Abstract
AIMS This study assessed the clinical efficacy and safety of telmisartan, an angiotensin II receptor blocker with a long terminal elimination half-life and almost exclusively excreted in bile, in patients with varying severity of chronic kidney disease (CKD). PATIENTS AND METHODS Adults with diastolic blood pressure (DBP) 90 - 109 mmHg and stable CKD were enrolled: mild/moderate (creatinine clearance (CrCl) 30 - 74 ml/ min/1.73 m2), severe (CrCl < 30 ml/min/1.73 m2) or requiring maintenance hemodialysis. A two- to four-week single-blind, placebo run-in period preceded once-daily telmisartan 40 mg administration for four weeks. Telmisartan 80 mg was given after four- or eight-week treatment ifDBP > or = 85 mmHg. After 12-week treatment, trough DBP/systolic blood pressure (SBP), DBP and SBP control rates, renal function and tolerability were recorded. RESULTS Mean changes in DBP/SBP were 10.5/-10.7 mmHg for mild/moderate CKD (n = 27), -11.2/-14.9 mmHg for severe CKD (n = 27) and -15.0/-21.1 mmHg for hemodialysis patients (n = 28). DBP control rates (< 90 mmHg)/SBP responses (< 140 mmHg or > 10 mmHg reduction) occurred in 59.3%/66.7%, 63.0%/70.4% and 71.4%/92.9% of mild/moderate CKD, severe CKD and hemodialysis patients, respectively. Incidences of drug-related adverse events were low, and all were known adverse events of telmisartan and common to other angiotensin II receptor blockers. At the end of treatment, a decrease in 24-h urine creatinine occurred in 5/53 (9.4%) patients. Two patients discontinued treatment prematurely due to the worsening of CKD and one due to aggravated proteinuria. CONCLUSION Once-daily telmisartan provided effective and well-tolerated treatment of mild/moderate hypertension in CKD patients, with no worsening of renal function.
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Affiliation(s)
- A M Sharma
- University Clinic Benjamin Franklin, Freie Universität, Berlin.
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Grötzschel S, Köster J, de Beer D. Degradation of 2,4-dichlorophenoxyacetic acid (2,4-d) by a hypersaline microbial mat and related functional changes in the mat community. Microb Ecol 2004; 48:254-262. [PMID: 15546044 DOI: 10.1007/s00248-003-2020-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2003] [Accepted: 07/21/2003] [Indexed: 05/24/2023]
Abstract
Microbial mats possibly possess degradation capacities for haloorganic pollutants because of their wide range of different functional groups of microorganisms combined with extreme diurnal changes in pH, oxygen, and sulfide gradients. In this study, 20 mg/l of the chlorinated herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) was applied to a pristine hypersaline cyanobacterial mat from Guerrero Negro, Mexico, under a light regime of 12 h dark/12 h light (600 mumol photons/m(2)s). The loss of 2,4-D was followed by chemical GC analysis; functional changes within the mat were determined with microelectrodes for oxygen, photosynthesis, pH, and sulfide. The depletion of 2,4-D due to photooxidation or sorption processes was checked in control experiments. Within 13 days, the light/dark incubated mats degraded 97% of the herbicide, while in permanent darkness only 35% were degraded. Adsorption of 2,4-D to the mat material, agar, or glass walls was negligible (4.6%), whereas 21% of the herbicide was degraded photochemically. The 2,4-D removal rate in the light/dark incubations was comparable to values reported for soils. The phototrophic community of the mat was permanently inhibited by the 2,4-D addition by 17% on average. The sulfate reduction in the entire mat and the respiration in the photic zone were inhibited more strongly but returned to original levels. Since at the end of the experiment the photosynthetic and respiratory activity of the mats were almost as high as in the beginning and 2,4-D almost completely disappeared, we conclude that the examined mats represent a robust and effective system for the degradation of the herbicide where probably the aerobic heterotrophic population is a major player in the degradation process.
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Affiliation(s)
- S Grötzschel
- Federal Institute for Occupational Safety and Health (FIOSH), Friedrich-Henkel-Weg 1-25, D-44149, Dortmund, Germany.
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Schlosser T, Pohl C, Veltmann C, Lohmaier S, Goenechea J, Ehlgen A, Köster J, Bimmel D, Kuntz-Hehner S, Becher H, Tiemann K. Feasibility of the flash-replenishment concept in renal tissue: which parameters affect the assessment of the contrast replenishment? Ultrasound Med Biol 2001; 27:937-944. [PMID: 11476928 DOI: 10.1016/s0301-5629(01)00397-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The purpose of the study was to evaluate whether power pulse inversion (PPI) and pulse inversion (PI) techniques allow the measurement of indices of microcirculatory flow in real-time at low emission power using contrast microbubbles. PPI and PI imaging were performed in a kidney perfusion model during continuous infusion of Definity (0.12 mL/min). At steady state of tissue enhancement, contrast was destroyed by emission of echo bursts at high emission power (MI = 1.3). Consecutively, contrast replenishment was assessed at low emission power (MI = 0.09) in real-time imaging modes (PPI: 12 Hz; PI: 25 Hz). Regions-of-interest (ROI) of variable sizes were placed in the renal cortex and bigger arteries to compare replenishment of macro- and microcirculation. Nonlinear curve fitting was performed using the mathematical model y=s+A(1-e(-betat)), with A as the parameter describing blood volume and beta as a parameter describing the speed of microbubble contrast replenishment. Replenishment curves could be visually appreciated and quantitatively analyzed in all renal segments. A was significantly higher in bigger arteries compared to renal cortex (p < 0.001). beta was found to be significantly higher in the arteries as compared to the cortex (p < 0.001). The SD of beta diminishes with increasing size of the ROI. The acquisition of replenishment curves following ultrasound (US)-induced destruction of contrast microbubbles is feasible at low power using PPI and PI. Assessment of replenishment kinetics allows the differentiation between macro- and microcirculation. Size and position of the ROI have an important impact on the generation of replenishment curves in both imaging modalities, which has to be taken into account.
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Affiliation(s)
- T Schlosser
- Department of Cardiology, University of Bonn, Bonn, Germany
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Köster J, Schlosser T, Pohl C, Lentz C, Lohmaier S, Veltmann C, Kuntz-Hehner S, Omran H, Lüderitz B, Becher H, Tiemann K. Blood flow assessment by ultrasound-induced destruction of echocontrast agents using harmonic power Doppler imaging: which parameters determine contrast replenishment curves? Echocardiography 2001; 18:1-8. [PMID: 11182774 DOI: 10.1046/j.1540-8175.2001.00001.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
OBJECTIVE To evaluate the feasibility of flow determinations by contrast replenishment using harmonic power Doppler imaging (H-PDI). BACKGROUND The application of indicator dilution principles on contrast echocardiography is limited by numerous methodical problems. Recently, a new method was introduced that relies on ultrasound-mediated microbubble destruction and evaluation of the contrast replenishment. METHODS Definity, a perfluorocarbon-derived contrast agent under development, was continuously infused into a steady flow phantom and H-PDI registrations were performed within a silicone tube (d = 8 mm). Replenishment interval between destruction and imaging frame was varied from 0.04-2 seconds. Nonlinear curve fitting was performed using an exponential mathematical model. RESULTS Strong linear correlation between contrast dose and maximum signal intensity as well as between flow and the slope variable beta of the replenishment curve was found for all settings (r > 0.96). Maximum signal intensity and contrast replenishment rate were found to be a function of emission power and were significantly influenced by depth and focus position. CONCLUSION The feasibility of flow assessment using replenishment curves obtained by H-PDI was demonstrated. However, in experimental conditions, flow analysis was severely influenced by ultrasound system settings and imaging conditions such as emission power, sound field geometry, and investigation depth. For a clinical use of this promising approach, algorithms that take specific system settings and imaging conditions into account have to be found. Imaging modalities that enable a most homogeneous scan field are best suited for the assessment of contrast replenishment.
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Affiliation(s)
- J Köster
- Department of Cardiology, University of Bonn, Sigmund-Freud Str. 25, 53105 Bonn, Germany
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Rössler A, Berrouschot J, Barthel H, Hesse S, Köster J, Schneider D. Potential of rheopheresis for the treatment of acute ischemic stroke when initiated between 6 and 12 hours. Ther Apher 2000; 4:358-62. [PMID: 11111817 DOI: 10.1046/j.1526-0968.2000.004005358.x] [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] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Improvement of hemorheology is one of the most important approaches in the treatment of acute ischemic stroke. We investigated the influence of extracorporal rheopheresis (ER) on cerebral blood flow in patients with acute ischemic stroke and evaluated its therapeutic effect. Thirty-three patients (rheopheresis group, 17; control group, 16; mean age 64 +/- 10 years) with acute ischemic stroke were included in our prospective randomized trial. The first treatment was started within 12 h after onset of symptoms, and treatment was repeated 3 times at an interval of 24 h. Hemorheological parameters were measured before and after each session. The cerebral blood flow was analyzed using 99mTc-ECD-SPECT. The functional and neurological outcomes were determined by follow-up investigations after 3 months. The hemorheological parameters were significantly different between the rheopheresis group (18% decrease of plasma viscosity, 55% decrease of red blood cell aggregation) and the control group (no decrease of both parameters). The single photon emission computed tomography (SPECT) analysis showed early reperfusion in 35% of the patients treated with rheopheresis and in 37% of the control group (NS). There were no differences in the neurological outcomes between the 2 groups. Extracorporal rheopheresis is practicable and safe. It rapidly and consistently improved the hemorheological parameters. Although this did not impact on cerebral perfusion or clinical outcome in patients with acute ischemic stroke in this report, we propose that ER deserves to be further evaluated by initiating the first treatment within 6 h post-insult.
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Affiliation(s)
- A Rössler
- Department of Neurology, University of Leipzig, Germany. 3.medizin.uni-leipzig.de
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Abstract
OBJECTIVE Whether stroke patients should be ventilated mechanically is still a contentious issue, because their outcome is very poor. We wanted to investigate how often mechanical ventilation is indicated in patients with hemispheric ischemic stroke as well as the outcome of these patients and the factors by which outcome is influenced. DESIGN Prospective case series. SETTING University hospital, neurocritical care unit. SUBJECTS Subjects were 218 patients who met the following inclusion criteria: age 18-85 yrs, acute hemispheric ischemic infarction, clinical examination, and computed tomography within 6 hrs after the onset of symptoms. INTERVENTIONS Mechanical ventilation was instituted with one or more of the following conditions: deterioration of consciousness with the inability to protect the airway; PaO2 of <60; P(CO2) of >60 mm Hg; breath rate of >40 breaths/min; and left heart insufficiency with definitive or impending pulmonary edema. MEASUREMENTS AND MAIN RESULTS Mechanical ventilation was indicated for 52 (24%) of the 218 patients: in 47 (90%) patients because of deterioration of consciousness, and in five (10%) patients because of heart insufficiency and/or pneumonia. In a logistic regression model, the history of hypertension and a size of infarction exceeding two thirds of the middle cerebral artery territory were independent variables for the application of mechanical ventilation. After 3 months, 42 (81%) of these 52 patients had died. The most common cause of death was fatal midbrain herniation caused by complete middle cerebral artery infarction. Patients who survived had a good-to-fair outcome. CONCLUSIONS New therapeutic strategies (e.g., hemicraniectomy) must be developed to reduce mortality and improve the outcome for this subgroup of ischemic stroke patients. Mechanical ventilation is and will remain a crucial element within such new concepts.
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Affiliation(s)
- J Berrouschot
- Department of Neurology, University of Leipzig, Germany
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Berrouschot J, Barthel H, Köster J, Hesse S, Rössler A, Knapp WH, Schneider D. Extracorporeal rheopheresis in the treatment of acute ischemic stroke: A randomized pilot study. Stroke 1999; 30:787-92. [PMID: 10187880 DOI: 10.1161/01.str.30.4.787] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE Extracorporeal rheopheresis is a safe method to optimize hemorheology. Our aim was to determine whether treatment with extracorporeal rheopheresis in patients with acute ischemic hemispheric stroke improves cerebral perfusion as assessed with serial 99mTc-ethyl-cysteinate-dimer single-photon emission CT (99mTc-ECD SPECT). We also investigated how clinical outcome is associated with treatment and imaging results. METHODS Thirty-three patients (mean age, 64+/-10 years) with acute ischemic hemispheric stroke were included in a prospective, randomized, parallel group pilot study. First treatment with or without extracorporeal rheopheresis took place within 12 hours after the onset of symptoms and was repeated 3 times at intervals of 24 hours. Hemorheological parameters were measured before and after each session. Each patient underwent 99mTc-ECD SPECT immediately before treatment, 6 to 8 hours after treatment, and after 5 days. A semiquantitative SPECT graded scale was used to measure depth and extent of activity deficits and thus to quantify the perfusion deficit. RESULTS Seventeen patients were actively treated with extracorporeal rheopheresis, and 16 patients did not receive extracorporeal rheopheresis. After 3 months, no differences were found in the functional or neurological outcome. Despite a rapid, sustained decrease of plasma viscosity and erythrocyte aggregation in the rheopheresis group, there was no significant difference in the SPECT graded scale after therapy between the 2 groups. Patients with early reperfusion (decrease in the SPECT graded scale >25% 6 to 8 hours after therapy compared with the baseline examination) experienced a better functional outcome (Modified Rankin Scale) after 3 months compared with patients without reperfusion (P=0.04). CONCLUSIONS Since quantitative flow mapping and clinical follow-up did not reveal any differences between patients who were treated with extracorporeal rheopheresis and controls, it appears very unlikely that extracorporeal rheopheresis enhances reperfusion after acute cerebral ischemia.
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Affiliation(s)
- J Berrouschot
- Department of Neurology, University of Leipzig, Germany.
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Berrouschot J, Barthel H, Hesse S, Köster J, Knapp WH, Schneider D. Differentiation between transient ischemic attack and ischemic stroke within the first six hours after onset of symptoms by using 99mTc-ECD-SPECT. J Cereb Blood Flow Metab 1998; 18:921-9. [PMID: 9701354 DOI: 10.1097/00004647-199808000-00013] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The aim of this study was to define the accuracy of 99mTc-ethyl cysteinate dimer-single photon emission computed tomography (99mTc-ECD-SPECT) in distinguishing transient ischemic attack from completed ischemic stroke at early stages after the onset of symptoms. In a prospective study we examined 82 patients within 6 hours after the onset of symptoms (neurologic deficit caused by middle cerebral artery ischemia) using both 99mTc-ECD-SPECT and computed tomography (CT). The follow-up was based on Scandinavian Stroke Scale (SSS) 24 hours and 5-7 days, as well as on CT 7 days, after the event. SPECT evaluation was performed both visually and using semiquantitative region-of-interest (ROI) analysis. According to visual SPECT analysis, on admission 59 of 82 patients had activity deficits in the symptomatic hemisphere. After 7 days, all these patients had neurologic symptoms (SSS 28 +/- 12 points), caused by a cerebral infarction as evidenced with CT. Twenty-three of 82 patients displayed no early activity deficit despite clinical symptoms. None of these patients had neurologic symptoms after 7 days (indicating transient ischemic attack or prolonged reversible ischemic neurologic deficit). In the semiquantitative SPECT analysis, all patients had abnormal count densities in the respective ROI (activity < 90% compared with the contralateral side). All patients with transient ischemia (n = 23) had count rate densities more than 70% of the respective contralateral ROI, whereas all patients with subsequent infarction (n = 59) had values < 70%. Use of 99mTc-ECD-SPECT allows transient ischemia to be distinguished from ischemic infarction using relative regional activity thresholds within the first 6 hours after onset of symptoms.
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Affiliation(s)
- J Berrouschot
- Department of Neurology, University of Leipzig, Germany
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Berrouschot J, Sterker M, Bettin S, Köster J, Schneider D. Mortality of space-occupying ('malignant') middle cerebral artery infarction under conservative intensive care. Intensive Care Med 1998; 24:620-3. [PMID: 9681786 DOI: 10.1007/s001340050625] [Citation(s) in RCA: 258] [Impact Index Per Article: 9.9] [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: 02/08/2023]
Abstract
OBJECTIVE To find what the mortality rate of space-occupying ('malignant') middle cerebral artery (MCA) infarction is under maximum conservative intensive care. To establish whether any early indicators of survival exist. DESIGN Prospective descriptive study. SETTING Neuro-critical care unit of a university hospital. PATIENTS Fifty-three patients (mean age 64 +/- 10 years) with 'malignant' MCA infarction. INTERVENTIONS Maximum conservative intensive care using a standardized protocol (heparin, osmotherapy, tromethamol, mild hyperventilation). The start of therapy was within 12 h after the onset of symptoms. MEASUREMENTS AND RESULTS The Glasgow Coma Scale (GCS) and Scandinavian Stroke Scale (SSS) were recorded daily. A computed tomography (CT) scan was performed on admission, on day 3 and on day 7. SSS, Barthel Index and Rankin Scale of the surviving patients were recorded after 3 months. On admission, the mean GCS was 13 +/- 3 points and mean SSS 18 +/- 7 points. All patients had to undergo mechanical ventilation (23 +/- 26 h after the onset of symptoms) and were comatose after 28 +/- 30 h. Of 53 patients, 37 (70%) suffered brain death in the intensive care unit (ICU) after an average of 90 +/- 59 h. After 3 months 42/53 (79 %) patients had died. The Barthel Index of the surviving patients was 54 +/- 12 points, the SSS 25 +/- 9 points and the Rankin Scale 3 +/- 1 points. The deceased patients had a significantly higher body temperature on admission than the surviving patients (36.8 degrees C vs 36.3 degrees C). CONCLUSIONS The mortality of patients with 'malignant' MCA infarction is very high despite maximum conservative intensive care.
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Affiliation(s)
- J Berrouschot
- Department of Neurology, University of Leipzig, Germany
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Berrouschot J, Barthel H, Scheel C, Köster J, Schneider D. Extracorporeal membrane differential filtration--a new and safe method to optimize hemorheology in acute ischemic stroke. Acta Neurol Scand 1998; 97:126-30. [PMID: 9517863 DOI: 10.1111/j.1600-0404.1998.tb00621.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Can extracorporeal membrane differential filtration be used on patients with acute stroke to optimize their hemorheology without reducing the number of oxygen carriers (erythrocytes) - and is this form of treatment safe? SUBJECTS AND METHODS In a prospective pilot study, 10 patients (67+/-4 years) suffering severe middle cerebral artery (MCA) stroke were treated with membrane differential filtration, which was first performed within 12 h following the onset of symptoms and repeated three times at intervals of 24 h. Hemorheological parameters were measured before and after each treatment session. RESULTS Extracorporeal membrane differential filtration treatment immediately led to a significant and sustained drop in all hemorheological parameters (fibrinogen by 54%, alpha2-macroglobulin by 76%, total cholesterol by 65%, LDL by 82%, and HDL by 38%). Plasma viscosity dropped from 1.3 to 1.1 mPa s, erythrocyte aggregation by 57%. By contrast, hematocrit and the erythrocyte count remained constant. Treatment had no side-effects. CONCLUSIONS Extracorporeal membrane differential filtration is a safe method to optimize hemorheology in patients with acute ischemic stroke.
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Affiliation(s)
- J Berrouschot
- Department of Neurology, University of Leipzig, Germany
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Becher H, Tiemann K, Köster J, Schlosser T, Luderitz B. The impact of stimulated acoustic emission on myocardial contrast echocardiography - first clinical results. J Am Coll Cardiol 1998. [DOI: 10.1016/s0735-1097(98)80086-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Becher H, Tiemann K, Köster J, Schlosser T, Ludoritz B. The impact of power weighted mean velocity on the evaluation of volumetric flow in small vessels. J Am Coll Cardiol 1998. [DOI: 10.1016/s0735-1097(98)82108-6] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Berrouschot J, Barthel H, Köster J, Hesse S, Knapp W, Schneider D. 2-07-03 Tc-99m-ECD-SPECT within the first six hours after ischemic stroke. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)85205-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Barz W, Daniel S, Hinderer W, Jaques U, Keßmann H, Köster J, Tiemann K. Metabolism and Enzymology of Isoflavone Malonylglucosides and Pterocarpan Phytoalexins in Cicer arietinum. Planta Med 1986:420. [PMID: 17345376 DOI: 10.1055/s-2007-969221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Affiliation(s)
- W Barz
- Lehrstuhl für Biochemie der Pflanzen Westfälische Wilhelms-Universität, D-4400 Münster, FRG
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Hinderer W, Köster J, Barz W. Purfication and properties of a specific isoflavone 7-O-glucoside-6''-malonate malonyestrase from roots of chickpea (Cicer arietinum L.). Arch Biochem Biophys 1986; 248:570-8. [PMID: 3740841 DOI: 10.1016/0003-9861(86)90510-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Protein extracts from roots of chickpea (Cicer arietinum L.) plants contained high esterase activity hydrolyzing malonate hemiesters of isoflavone 7-O-glucosides. Using 5,7-dihydroxy-4'-methoxyisoflavone (biochanin A) 7-O-glucoside-6"-malonate as a substrate, a specific malonylesterase was purified about 700-fold to near homogeneity. The purified enzyme possesses an extremely low enzyme activity with synthetic esterase substrates. Various putative nonspecific esterases, as tested with alpha-naphthylacetate, were removed during enzyme purification. The malonylesterase demonstrated a very high molecular mass in gel chromatography and in sedimentation analyses with sucrose gradients (greater than or equal to 2 X 10(6)). Analytical sodium dodecyl sulfate-polyacrylamide gel electrophoresis pointed to a single subunit of 32,000. The catalyzed reaction showed a pH optimum at 7.5 and a temperature optimum between 30 and 35 degrees C. The apparent Km for biochanin A 7-O-glucoside-6"-malonate was (4.2 +/- 1.2) X 10(-4) M. The malonylesterase was insensitive to the esterase inhibitors eserine and neostigmine (10(-3) M) as well as phenylmethylsulfonyl fluoride, paraoxon, and diisopropylfluorophosphate (10(-4) M). On the other hand enzyme activity was totally inhibited by Hg2+ ions (10(-5) M) and p-hydroxymercuribenzoate (10(-4) M), whereas iodoacetamide (10(-6)-10(-4) M) inhibited only partially. Di- and tricarboxylic acids strongly stimulated enzyme activity at 10(-2) M. These properties indicate that the malonylesterase from chickpea roots greatly differs from other known esterases. The possible biological function of the specific malonylesterase is discussed in relation to isoflavone conjugate metabolism in chickpea.
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Köster J, Strack D, Barz W. High Performance Liquid Chromatographic Separation of Isoflavones and Structural Elucidation of Isoflavone 7-O-glucoside 6''-malonates from Cicer arietinum. Planta Med 1983; 48:131-5. [PMID: 17404971 DOI: 10.1055/s-2007-969907] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
An efficient separation by HPLC of isoflavone aglycones and glucosides on reversed - phase columns is described. The main isoflavone constituents of CICER ARIETINUM L., various TRIFOLIUM species, BAPTISIA AUSTRALIS L. and ONONIS SPINOSA L. are formononetin 7-O-glucoside 6''-malonate and biochanin A 7-O-glucoside 6''-malonate.
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Affiliation(s)
- J Köster
- Lehrstuhl für Biochemie der Pflanzen, Universität Münster, Federal Republic of Germany
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Abstract
Efficacy of and tolerance to brotizolam when used as a preoperative hypnotic were studied in two double-blind, randomised parallel group studies. Brotizolam (0.25 and 0.50 mg) was superior to placebo. Efficacy was assessed as good-to-satisfactory in 73.0% of patients with 0.25 mg and in 88.0% with 0.5 mg. A similar assessment was reached in 40.0% of patients with placebo. Brotizolam 0.5 mg was superior to 0.25 mg, and with the higher dose subjective assessments of anxiety were reduced. Efficacy of tolerance to 0.5 mg brotizolam and 2.0 mg flunitrazepam were compared, and both drugs were found to be effective and well tolerated. Brotizolam maintained sleep throughout the night more effectively than flunitrazepam. A dose range of 0.25-0.5 mg brotizolam is recommended as a pre-operative hypnotic.
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Köster J, Barz W. [Charakterisierung einer UDPG-Isoflavon-7-0-Glucosyltransferase aus Wurzeln der Kichererbse (Cicer arietinum L.).]. Planta Med 1981; 42:117-8. [PMID: 17401910 DOI: 10.1055/s-2007-971575] [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] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Affiliation(s)
- J Köster
- Lehrstuhl für Biochemie der Pflanzen, der Universität 4400 Münster, Federal Republic of Germany
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Reichart P, Köster J. [Selfinduced gingival mutilations--a diagnostic and therapeutic problem]. Dtsch Zahnarztl Z 1978; 33:93-5. [PMID: 271595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A case of factitial gingival traumatism and trichotillomania in a hysteric 28-year-old female patient is reported. During a period of 31 months the patient presented with gingival necrosis which involved the lingual aspects of all four quadrants respectively. A wide range of diagnostical aids failed to enlighten the nature of the lesions until the patient developed an alopecia capitis which was typical for hysteric trichotillomania. The diagnostical and therapeutical aspects of selfmutilation in hysteria are discussed.
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