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Rab MAE, Kanne CK, Bos J, Oirschot BA, Boisson C, Houwing ME, Gerritsma J, Teske E, Renoux C, Riedl J, Schutgens REG, Bartels M, Nur E, Joly P, Fort R, Cnossen MH, Wijk R, Connes P, Beers EJ, Sheehan VA. Oxygen gradient ektacytometry-derived biomarkers are associated with vaso-occlusive crises and correlate with treatment response in sickle cell disease. Am J Hematol 2021; 96:E29-E32. [PMID: 33095451 PMCID: PMC7756395 DOI: 10.1002/ajh.26031] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 10/13/2020] [Accepted: 10/15/2020] [Indexed: 01/04/2023]
Affiliation(s)
- Minke A. E. Rab
- Central Diagnostic Laboratory‐Research University Medical Center Utrecht, Utrecht University Utrecht The Netherlands
- Van Creveldkliniek, University Medical Center Utrecht Utrecht University Utrecht The Netherlands
| | - Celeste K. Kanne
- Department of Pediatrics Emory University School of Medicine Childrenʼs Healthcare of Atlanta Atlanta Georgia USA
| | - Jennifer Bos
- Central Diagnostic Laboratory‐Research University Medical Center Utrecht, Utrecht University Utrecht The Netherlands
| | - Brigitte A. Oirschot
- Central Diagnostic Laboratory‐Research University Medical Center Utrecht, Utrecht University Utrecht The Netherlands
| | - Camille Boisson
- Laboratory LIBM EA7424, University of Lyon 1, “Vascular Biology and Red Blood Cell” team Lyon France
- Laboratory of Excellence GR‐Ex Paris France
| | - Maite E. Houwing
- Department of Pediatric Hematology Erasmus Medical Center Rotterdam The Netherlands
| | - Jorn Gerritsma
- Emma Childrenʼs Hospital, Pediatric Hematology Amsterdam University Medical Centers Amsterdam The Netherlands
| | - Erik Teske
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine Utrecht University Utrecht The Netherlands
| | - Celine Renoux
- Laboratory LIBM EA7424, University of Lyon 1, “Vascular Biology and Red Blood Cell” team Lyon France
- Laboratory of Excellence GR‐Ex Paris France
- Laboratory of Biochemistry and Molecular Biology, UF Biochemistry of Red Blood Cell diseases, Est Center of Biology and Pathology Hospices Civils de Lyon Lyon France
| | - Jurgen Riedl
- Result Laboratory Albert Schweitzer Hospital Dordrecht The Netherlands
| | - Roger E. G. Schutgens
- Van Creveldkliniek, University Medical Center Utrecht Utrecht University Utrecht The Netherlands
| | - Marije Bartels
- Van Creveldkliniek, University Medical Center Utrecht Utrecht University Utrecht The Netherlands
| | - Erfan Nur
- Department of Hematology Amsterdam University Medical Centers Amsterdam The Netherlands
| | - Philippe Joly
- Laboratory LIBM EA7424, University of Lyon 1, “Vascular Biology and Red Blood Cell” team Lyon France
- Laboratory of Excellence GR‐Ex Paris France
- Laboratory of Biochemistry and Molecular Biology, UF Biochemistry of Red Blood Cell diseases, Est Center of Biology and Pathology Hospices Civils de Lyon Lyon France
| | - Romain Fort
- Department of Internal Medicine Hospices Civils de Lyon Lyon France
| | - Marjon H. Cnossen
- Department of Pediatric Hematology Erasmus Medical Center Rotterdam The Netherlands
| | - Richard Wijk
- Central Diagnostic Laboratory‐Research University Medical Center Utrecht, Utrecht University Utrecht The Netherlands
| | - Philippe Connes
- Laboratory LIBM EA7424, University of Lyon 1, “Vascular Biology and Red Blood Cell” team Lyon France
- Laboratory of Excellence GR‐Ex Paris France
| | - Eduard J. Beers
- Van Creveldkliniek, University Medical Center Utrecht Utrecht University Utrecht The Netherlands
| | - Vivien A. Sheehan
- Department of Pediatrics Emory University School of Medicine Childrenʼs Healthcare of Atlanta Atlanta Georgia USA
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Schop A, Stouten K, Riedl J, van Houten R, van Rosmalen J, Wolfhagen F, Bindels PJE, Levin MD. Long-term outcomes in patients newly diagnosed with iron deficiency anaemia in general practice: a retrospective cohort study. BMJ Open 2019; 9:e032930. [PMID: 31784447 PMCID: PMC6924716 DOI: 10.1136/bmjopen-2019-032930] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
OBJECTIVES To describe all iron deficiency anaemia (IDA)-related causes during follow-up of patients newly diagnosed with IDA and to assess whether a delayed colorectal cancer (CRC) diagnosis influences survival. DESIGN AND SETTING Retrospective cohort study of patients from general practices in the Dordrecht area, the Netherlands. PARTICIPANTS Men and women aged ≥50 years with a new diagnosis of IDA (ie, no anaemia 2 years previously). METHOD From February 2007 to February 2018, all relevant data were collected from the files of the referral hospital. Early IDA-related cause was defined as established within 18 weeks after IDA diagnosis. Cox proportional-hazards regression was used to analyse survival of patients with CRC diagnosis. RESULTS 587 patients with IDA were included with a median follow-up of 4.6 years. Early and late IDA-related causes could be established in 32% and 8% of patients, respectively. Early and late CRC was found in 8% and 2% of patients, respectively, and were located mainly right sided. After adjustment for age, gender and TNM classification, mortality risk was lower in patients with IDA with early CRC diagnosis, but not significantly (HR 0.30, 95% CI 0.09 to 1.02). CONCLUSION Even with extended follow-up, the cause of IDA remains elusive in the majority of patients with IDA in general practice. However, patients with IDA are at increased risk for in particular right-sided CRC and a late diagnosis of CRC appears to have a detrimental effect on survival in patients with IDA.
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Affiliation(s)
- Annemarie Schop
- Internal Medicine, Albert Schweitzer Hospital Location Dordwijk, Dordrecht, The Netherlands
| | - Karlijn Stouten
- Clinical Chemistry, Albert Schweitzer Hospital Location Dordwijk, Dordrecht, The Netherlands
| | - Jurgen Riedl
- Clinical Chemistry, Albert Schweitzer Hospital Location Dordwijk, Dordrecht, The Netherlands
| | - Ron van Houten
- General practice, General practice van Houten, Hendrik-Ido-Ambacht, The Netherlands
| | | | - Frank Wolfhagen
- Gastro-enterology, Albert Schweitzer Hospital Location Dordwijk, Dordrecht, The Netherlands
| | | | - Mark-David Levin
- Internal Medicine, Albert Schweitzer Hospital Location Dordwijk, Dordrecht, The Netherlands
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Mir Seyed Nazari P, Ay C, Preusser M, Riedl J, Marosi C, Moik F, Ricken G, Hainfellner J, Pabinger-Fasching I, Berghoff A. Association of systemic inflammation with local tumour characteristics and survival in glioma patients. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz243.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Riedl J, Posch F, Prager G, Eisterer W, Öhler L, Thamer S, Wilthoner K, Petzer A, Pichler P, Hubmann E, Winder T, Burgstaller S, Korger M, Andel J, Greil R, Pecherstorfer M, Philipp-Abbrederis K, Djanani A, Gruenberger B, Längle F, Wöll E, Gerger A. The AST/ALT (De Ritis) ratio predicts clinical outcome in pancreatic cancer patients treated with first-line nab-paclitaxel and gemcitabine: post-hoc analysis of an Austrian multicenter, non-interventional study. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.285] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rab MA, Oirschot BA, Bos J, Merkx TH, Wesel AC, Abdulmalik O, Safo MK, Versluijs BA, Houwing ME, Cnossen MH, Riedl J, Schutgens RE, Pasterkamp G, Bartels M, Beers EJ, Wijk R. Rapid and reproducible characterization of sickling during automated deoxygenation in sickle cell disease patients. Am J Hematol 2019; 94:575-584. [PMID: 30784099 PMCID: PMC6518936 DOI: 10.1002/ajh.25443] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [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: 02/11/2019] [Revised: 02/17/2019] [Accepted: 02/19/2019] [Indexed: 01/02/2023]
Abstract
In sickle cell disease (SCD), sickle hemoglobin (HbS) polymerizes upon deoxygenation, resulting in sickling of red blood cells (RBCs). These sickled RBCs have strongly reduced deformability, leading to vaso‐occlusive crises and chronic hemolytic anemia. To date, there are no reliable laboratory parameters or assays capable of predicting disease severity or monitoring treatment effects. We here report on the oxygenscan, a newly developed method to measure RBC deformability (expressed as Elongation Index ‐ EI) as a function of pO2. Upon a standardized, 22 minute, automated cycle of deoxygenation (pO2 median 16 mmHg ± 0.17) and reoxygenation, a number of clinically relevant parameters are produced in a highly reproducible manner (coefficients of variation <5%). In particular, physiological modulators of oxygen affinity, such as, pH and 2,3‐diphosphoglycerate showed a significant correlation (respectively R = ‑0.993 and R = 0.980) with Point of Sickling (PoS5%), which is defined as the pO2 where a 5% decrease in EI is observed during deoxygenation. Furthermore, in vitro treatment with antisickling agents, including GBT440, which alter the oxygen affinity of hemoglobin, caused a reproducible left‐shift of the PoS, indicating improved deformability at lower oxygen tensions. When RBCs from 21 SCD patients were analyzed, we observed a significantly higher PoS in untreated homozygous SCD patients compared to treated patients and other genotypes. We conclude that the oxygenscan is a state‐of‐the‐art technique that allows for rapid analysis of sickling behavior in SCD patients. The method is promising for personalized treatment, development of new treatment strategies and could have potential in prediction of complications.
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Affiliation(s)
- Minke A.E. Rab
- Laboratory of Clinical Chemistry & HematologyUniversity Medical Center Utrecht, Utrecht University Utrecht The Netherlands
- Van CreveldkliniekUniversity Medical Center Utrecht, Utrecht University Utrecht The Netherlands
| | - Brigitte A. Oirschot
- Laboratory of Clinical Chemistry & HematologyUniversity Medical Center Utrecht, Utrecht University Utrecht The Netherlands
| | - Jennifer Bos
- Laboratory of Clinical Chemistry & HematologyUniversity Medical Center Utrecht, Utrecht University Utrecht The Netherlands
| | - Tesy H. Merkx
- Laboratory of Clinical Chemistry & HematologyUniversity Medical Center Utrecht, Utrecht University Utrecht The Netherlands
| | - Annet C.W. Wesel
- Laboratory of Clinical Chemistry & HematologyUniversity Medical Center Utrecht, Utrecht University Utrecht The Netherlands
| | - Osheiza Abdulmalik
- Division of HematologyThe Children's Hospital of Philadelphia Philadelphia Pennsylvania
| | - Martin K. Safo
- Department of Medicinal Chemistry, Institute for Structural Biology, Drug Discovery and Development, School of PharmacyVirginia Commonwealth University Virginia
| | - Birgitta A. Versluijs
- Department of Pediatric HematologyUniversity Medical Center Utrecht, Utrecht University Utrecht The Netherlands
| | - Maite E. Houwing
- Department of Pediatric HematologyErasmus University Medical Center– Sophia Children's Hospital Rotterdam The Netherlands
| | - Marjon H. Cnossen
- Department of Pediatric HematologyErasmus University Medical Center– Sophia Children's Hospital Rotterdam The Netherlands
| | - Jurgen Riedl
- Result LaboratoryAlbert Schweitzer Hospital Dordrecht The Netherlands
| | - Roger E.G. Schutgens
- Van CreveldkliniekUniversity Medical Center Utrecht, Utrecht University Utrecht The Netherlands
| | - Gerard Pasterkamp
- Laboratory of Clinical Chemistry & HematologyUniversity Medical Center Utrecht, Utrecht University Utrecht The Netherlands
| | - Marije Bartels
- Department of Pediatric HematologyUniversity Medical Center Utrecht, Utrecht University Utrecht The Netherlands
| | - Eduard J. Beers
- Van CreveldkliniekUniversity Medical Center Utrecht, Utrecht University Utrecht The Netherlands
| | - Richard Wijk
- Laboratory of Clinical Chemistry & HematologyUniversity Medical Center Utrecht, Utrecht University Utrecht The Netherlands
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Leithner A, van Praag V, Posch F, Bergovec M, Leitner L, Friesenbichler J, Heregger R, Smolle-Jüttner FM, Fiocco M, van de Sande M, Riedl J, Pichler M, Gerger A, Szkandera J, Stöger H, Liegl-Atzwanger B, Smolle M. Efficacy of metastasectomy on survival in patients with metachronous soft tissue sarcoma-metastasis: Results of a bi-centre study including 135 patients. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy299.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Mir Seyed Nazari P, Riedl J, Preusser M, Posch F, Thaler J, Marosi C, Birner P, Ricken G, Hainfellner JA, Pabinger I, Ay C. Combination of isocitrate dehydrogenase 1 (IDH1) mutation and podoplanin expression in brain tumors identifies patients at high or low risk of venous thromboembolism. J Thromb Haemost 2018; 16:1121-1127. [PMID: 29676036 PMCID: PMC6099350 DOI: 10.1111/jth.14129] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Indexed: 12/11/2022]
Abstract
Essentials Risk stratification for venous thromboembolism (VTE) in patients with brain tumors is challenging. Patients with IDH1 wildtype and high podoplanin expression have a 6-month VTE risk of 18.2%. Patients with IDH1 mutation and no podoplanin expression have a 6-month VTE risk of 0%. IDH1 mutation and podoplanin overexpression in primary brain tumors appear to be exclusive. SUMMARY Background Venous thromboembolism (VTE) is a frequent complication in primary brain tumor patients. Independent studies revealed that podoplanin expression in brain tumors is associated with increased VTE risk, whereas the isocitrate dehydrogenase 1 (IDH1) mutation is associated with very low VTE risk. Objectives To investigate the interrelation between intratumoral podoplanin expression and IDH1 mutation, and their mutual impact on VTE development. Patients/Methods In a prospective cohort study, intratumoral IDH1 R132H mutation and podoplanin were determined in brain tumor specimens (mainly glioma) by immunohistochemistry. The primary endpoint of the study was symptomatic VTE during a 2-year follow-up. Results All brain tumors that expressed podoplanin to a medium-high extent showed also an IDH1 wild-type status. A score based on IDH1 status and podoplanin expression levels allowed prediction of the risk of VTE. Patients with wild-type IDH1 brain tumors and high podoplanin expression had a significantly increased VTE risk compared with those with mutant IDH1 tumors and no podoplanin expression (6-month risk 18.2% vs. 0%). Conclusions IDH1 mutation and podoplanin overexpression seem to be exclusive. Although brain tumor patients with IDH1 mutation are at very low risk of VTE, the risk of VTE in patients with IDH1 wild-type tumors is strongly linked to podoplanin expression levels.
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Affiliation(s)
- P. Mir Seyed Nazari
- Clinical Division of Hematology and HemostaseologyDepartment of Medicine IComprehensive Cancer CenterCenter Medical University of ViennaViennaAustria
| | - J. Riedl
- Clinical Division of Hematology and HemostaseologyDepartment of Medicine IComprehensive Cancer CenterCenter Medical University of ViennaViennaAustria
| | - M. Preusser
- Clinical Division of OncologyDepartment of Medicine IComprehensive Cancer CenterMedical University of ViennaViennaAustria
| | - F. Posch
- Clinical Division of Hematology and HemostaseologyDepartment of Medicine IComprehensive Cancer CenterCenter Medical University of ViennaViennaAustria
- Division of OncologyDepartment of Internal MedicineMedical University of GrazGrazAustria
| | - J. Thaler
- Clinical Division of Hematology and HemostaseologyDepartment of Medicine IComprehensive Cancer CenterCenter Medical University of ViennaViennaAustria
| | - C. Marosi
- Clinical Division of OncologyDepartment of Medicine IComprehensive Cancer CenterMedical University of ViennaViennaAustria
| | - P. Birner
- Clinical Institute of PathologyMedical University of ViennaViennaAustria
| | - G. Ricken
- Institute of NeurologyMedical University of ViennaViennaAustria
| | | | - I. Pabinger
- Clinical Division of Hematology and HemostaseologyDepartment of Medicine IComprehensive Cancer CenterCenter Medical University of ViennaViennaAustria
| | - C. Ay
- Clinical Division of Hematology and HemostaseologyDepartment of Medicine IComprehensive Cancer CenterCenter Medical University of ViennaViennaAustria
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van der Straten L, Dinmohamed AG, Westerweel PE, Langerak AW, Riedl J, Doorduijn JK, Kater AP, Levin MD. Rituximab addition to chemotherapy in real world patients with chronic lymphocytic leukemia: effective in first line but indication of lack of efficacy in subsequent lines of therapy. Leuk Lymphoma 2018; 59:2757-2761. [DOI: 10.1080/10428194.2018.1452215] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Lina van der Straten
- Department of Internal Medicine, Albert Schweitzer Hospital, Dordrecht, The Netherlands
| | - Avinash G. Dinmohamed
- Department of Research, Netherlands Comprehensive Cancer Organisation (IKNL), Utrecht, The Netherlands
- Department of Public Health, Erasmus University Medical Centre, Rotterdam, The Netherlands
- Department of Hematology, Erasmus MC Cancer Institute, Rotterdam, The Netherlands
| | - Peter E. Westerweel
- Department of Internal Medicine, Albert Schweitzer Hospital, Dordrecht, The Netherlands
| | - Anton W. Langerak
- Department of Immunology, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - Jurgen Riedl
- Department of Clinical Chemistry, Result laboratories, Albert Schweitzer Hospital, Dordrecht, The Netherland
| | | | - Arnon P. Kater
- Department of Hematology, Academic Medical Centre, Amsterdam, the Netherlands
| | - Mark-David Levin
- Department of Internal Medicine, Albert Schweitzer Hospital, Dordrecht, The Netherlands
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Nazari P, Riedl J, Preusser M, Posch F, Thaler J, Marosi C, Birner P, Ricken G, Hainfellner J, Pabinger I, Ay C. The combination of podoplanin expression levels and IDH1 mutation status predicts VTE risk in patients with brain tumors. Thromb Res 2018. [DOI: 10.1016/j.thromres.2018.02.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Rottner L, Schmidt T, Dotz I, Lemes C, Heeger CH, Fink T, Mathew S, Reissmann B, Rexha E, Riedl J, Frerker C, Ouyang F, Kuck KH, Metzner A, Maurer T. P1212The clip and the tip: Long-term clinical outcome after ablation of atrial fibrillation in patients with MitraClip. Europace 2018. [DOI: 10.1093/europace/euy015.694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- L Rottner
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
| | - T Schmidt
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
| | - I Dotz
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
| | - C Lemes
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
| | - C H Heeger
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
| | - T Fink
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
| | - S Mathew
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
| | - B Reissmann
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
| | - E Rexha
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
| | - J Riedl
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
| | - C Frerker
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
| | - F Ouyang
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
| | - K H Kuck
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
| | - A Metzner
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
| | - T Maurer
- Asklepios Clinic St. Georg, Cardiology, Hamburg, Germany
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Schop A, Kip MMA, Stouten K, Dekker S, Riedl J, van Houten RJ, van Rosmalen J, Dinant GJ, IJzerman MJ, Koffijberg H, Bindels PJE, Kusters R, Levin MD. The effectiveness of a routine versus an extensive laboratory analysis in the diagnosis of anaemia in general practice. Ann Clin Biochem 2018; 55:535-542. [DOI: 10.1177/0004563217748680] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Background We investigated the percentage of patients diagnosed with the correct underlying cause of anaemia by general practitioners when using an extensive versus a routine laboratory work-up. Methods An online survey was distributed among 836 general practitioners. The survey consisted of six cases, selected from an existing cohort of anaemia patients ( n = 3325). In three cases, general practitioners were asked to select the laboratory tests for further diagnostic examination from a list of 14 parameters (i.e. routine work-up). In the other three cases, general practitioners were presented with all 14 laboratory test results available (i.e. extensive work-up). General practitioners were asked to determine the underlying cause of anaemia in all six cases based on the test results, and these answers were compared with the answers of an expert panel. Results A total of 139 general practitioners (partly) responded to the survey (17%). The general practitioners were able to determine the underlying cause of anaemia in 53% of cases based on the routine work-up, whereas 62% of cases could be diagnosed using an extensive work-up ( P = 0.007). In addition, the probability of a correct diagnosis decreased with the patient’s age and was also affected by the underlying cause itself, with anaemia of chronic disease being hardest to diagnose ( P = 0.003). Conclusion The use of an extensive laboratory work-up in patients with newly diagnosed anaemia is expected to increase the percentage of correct underlying causes established by general practitioners. Since the underlying cause can still not be established in 31.3% of anaemia patients, further research is necessary.
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Affiliation(s)
- Annemarie Schop
- Department of Internal Medicine, Albert Schweitzer Hospital, Dordrecht, the Netherlands
| | - Michelle MA Kip
- Department of Health Technology and Services Research, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands
| | - Karlijn Stouten
- Department of Clinical Chemistry, Albert Schweitzer Hospital, Dordrecht, the Netherlands
| | - Soraya Dekker
- Department of Health Technology and Services Research, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands
| | - Jurgen Riedl
- Department of Clinical Chemistry, Albert Schweitzer Hospital, Dordrecht, the Netherlands
| | - Ron J van Houten
- General Medical Practice van Houten, Hendrik-Ido-Ambacht, the Netherlands
| | | | - Geert-Jan Dinant
- Department of General Practice, Caphri School for Public Health and Primary Care, Maastricht University, Maastricht, the Netherlands
| | - Maarten J IJzerman
- Department of Health Technology and Services Research, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands
| | - Hendrik Koffijberg
- Department of Health Technology and Services Research, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands
| | | | - Ron Kusters
- Department of Health Technology and Services Research, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands
- Laboratory for Clinical Chemistry and Haematology, Jeroen Bosch Hospital, Den Bosch, the Netherlands
| | - Mark-David Levin
- Department of Internal Medicine, Albert Schweitzer Hospital, Dordrecht, the Netherlands
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Abstract
SummaryPlatelets are the smallest circulating blood cells and their major function is the maintenance of haemostasis. They do not have a nucleus, but instead a multitude of granules that contain molecules important for several physiological processes. These granules can be released after platelet activation and thereby platelets take part in haemostasis, wound repair or immunological processes. Furthermore, platelets are also involved in the pathophysiology of several diseases, including cancer. Platelets can support various steps of cancer development and progression by promoting tumour growth, angiogenesis and metastasis. Moreover, platelets contribute to the hypercoagulable state frequently observed in cancer patients, leading to an increased risk of venous thromboembolism (VTE). In previous studies a high platelet count was repeatedly found to be associated with an elevated risk of VTE and a worse prognosis in patients with cancer.The aim of this review is to give an overview of the most important alterations of platelet physiology in cancer patients and how these alterations may influence cancer disease and contribute to cancer-associated VTE.
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Wiedner H, Riedl J, Maringer FJ, Baumgartner A, Stietka M, Kabrt F. Production and characterization of a traceable NORM material and its use in proficiency testing of gamma-ray spectrometry laboratories. Appl Radiat Isot 2017; 134:45-50. [PMID: 29079417 DOI: 10.1016/j.apradiso.2017.09.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 04/07/2017] [Revised: 08/23/2017] [Accepted: 09/15/2017] [Indexed: 11/18/2022]
Abstract
This paper outlines the process of characterizing a new NORM material for proficiency testing made of quartz sand with significantly elevated levels of 226Ra obtained from the backflush of a drinking water treatment facility. Samples of the fully characterized NORM material were sent to European laboratories concerned with radioactivity measurements and environmental monitoring by gamma-ray spectrometry for proficiency testing. The paper discusses the results, specific requirements, problems and solutions that were found during the characterization process and the proficiency test.
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Affiliation(s)
- H Wiedner
- BEV - Bundesamt für Eich- und Vermessungswesen, Arltgasse 35, 1160 Wien, Austria; BOKU - University for Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Wien, Austria.
| | - J Riedl
- TU Wien - Technical University of Vienna, Karlsplatz 13, 1040 Wien, Austria
| | - F J Maringer
- BEV - Bundesamt für Eich- und Vermessungswesen, Arltgasse 35, 1160 Wien, Austria; BOKU - University for Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Wien, Austria; TU Wien - Technical University of Vienna, Karlsplatz 13, 1040 Wien, Austria
| | - A Baumgartner
- BOKU - University for Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Wien, Austria
| | - M Stietka
- BOKU - University for Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Wien, Austria
| | - F Kabrt
- BOKU - University for Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Wien, Austria
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Maurer T, Sohns C, Metzner A, Rottner L, Riedl J, Reissmann B, Heeger CH, Lemes C, Fink T, Santoro F, Mathew S, Kuck KH, Ouyang F. P1713A balancing act - contact force along the anterior aspect of the lateral pulmonary veins during catheter ablation of atrial fibrillation. Europace 2017. [DOI: 10.1093/ehjci/eux161.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hayashi K, Heeger CH, Saguner AM, Mathew S, Maurer T, Lemes C, Riedl J, Sohns C, Santoro F, Reissmann B, Tilz RR, Metzner A, Kuck KH, Ouyang F. P1054Antegrade-transseptal approach for left ventricular tachyarrhythmia in patients with previous mitraclip implantation. Europace 2017. [DOI: 10.1093/ehjci/eux151.233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Heeger C, Wissner E, Knoell M, Knoop B, Reissmann B, Mathew S, Lemes C, Maurer T, Santoro F, Riedl J, Inaba O, Goldmann B, Ouyang F, Kuck KH, Metzner A. P326Three-year clinical outcome after second-generation cryoballoon based pulmonary vein isolation for the treatment of paroxysmal and persistent atrial fibrillation: A two-center experience. Europace 2017. [DOI: 10.1093/ehjci/eux141.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Maurer T, Metzner A, Wohlmuth P, Reissmann B, Heeger CH, Lemes C, Fink T, Hayashi K, Saguner AM, Riedl J, Sohns C, Mathew S, Wissner E, Kuck KH, Ouyang F. P1712A novel design for the mitral isthmus line reducing the need for epicardial ablation. Europace 2017. [DOI: 10.1093/ehjci/eux161.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Santoro F, Heeger CH, Zhang P, Inaba O, Reissmann B, Maurer T, Lemes C, Riedl J, Fink T, Mathew S, Metzner A, Kuck KH, Ouyang F. P1051P wave morphology during pacing inside pulmonary veins and prevalence of m wave pattern on 12 lead surface ECG. Europace 2017. [DOI: 10.1093/ehjci/eux151.230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Saguner AM, Mathew S, Schenker N, Metzner A, Santoro F, Reissmann B, Yashuiro Y, Maurer T, Lemes C, Heeger CH, Riedl J, Sohns C, Kuck KH, Ouyang F. P482Catheter ablation of ventricular tachycardia in patients with arrhythmogenic right ventricular cardiomyopathy/dysplasia - the hamburg sequential approach. Europace 2017. [DOI: 10.1093/ehjci/eux141.205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rexha E, Riedl J, Lemes C, Maurer T, Reissmann B, Heeger C, Rottner L, Santoro F, Sohns C, Metzner A, Kuck K, Ouyang F, Mathew S. P328Initial clinical results with a novel contact force sensing catheter: assessment of safety and feasibility. Europace 2017. [DOI: 10.1093/ehjci/eux141.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Maurer T, Sohns C, Deiss S, Rottner L, Wohlmuth P, Reissmann B, Heeger CH, Lemes C, Riedl J, Santoro F, Mathew S, Metzner A, Ouyang F, Kuck KH, Wissner E. P1711Significant reduction in procedure duration in remote magnetic-guided catheter ablation of atrial fibrillation using the third-generation magnetic navigation system. Europace 2017. [DOI: 10.1093/ehjci/eux161.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Rexha E, Metzner A, Wissner E, Reissmann B, Maurer T, Heeger C, Lemes C, Rottner L, Fink T, Riedl J, Santoro F, Mathew S, Ouyang F, Kuck K, Sohns C. 758Man vs. Maschine for ablation of ventricular arrhythmias: a direct comparison of remote magnetic navigation versus manual-guided ablation of ventricular arrhythmias. Europace 2017. [DOI: 10.1093/ehjci/eux147.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Heeger C, Rillig A, Tilz RR, Fink T, Mathew S, Reissmann B, Lemes C, Maurer T, Santoro F, Riedl J, Sohns C, Metzner A, Kuck KH, Ouyang F. P245Long-term outcome and incidence of embolic stroke and left atrial appendage thrombus formation after electrical isolation of the left atrial appendage for the treatment of atrial tachyarrhythmias. Europace 2017. [DOI: 10.1093/ehjci/eux171.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Sohns C, Maurer T, Rottner L, Heeger CH, Fink T, Lemes C, Mathew S, Reissmann B, Rexha E, Riedl J, Santoro F, Metzner A, Ouyang F, Kuck KH. P308Never underestimate the power of the force: lessions from catheter ablation of atrial fibrillation using the novel thermocool smarttouch surround flow ablation catheter. Europace 2017. [DOI: 10.1093/ehjci/eux141.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rexha E, Metzner A, Wissner E, Mathew S, Reissmann B, Maurer T, Heeger C, Lemes C, Rottner L, Fink T, Riedl J, Santoro F, Ouyang F, Kuck K, Sohns C. P391Current role and further prospective of catheter ablation of ventricular arrhythmias using Remote Magnetic Navigation: A single center observational study. Europace 2017. [DOI: 10.1093/ehjci/eux141.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Riedl J, Posch F, Stotz M, Bezan A, Winder T, Schaberl-Moser R, Pichler M, Stoeger H, Gerger A. Patterns of venous thromboembolism risk in patients with localized colorectal cancer undergoing adjuvant chemotherapy or active surveillance. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw370.107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Egelé A, Stouten K, van der Heul-Nieuwenhuijsen L, de Bruin L, Teuns R, van Gelder W, Riedl J. Classification of several morphological red blood cell abnormalities by DM96 digital imaging. Int J Lab Hematol 2016; 38:e98-e101. [DOI: 10.1111/ijlh.12530] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- A. Egelé
- Result laboratory; Albert Schweitzer hospital; Dordrecht Netherlands
| | - K. Stouten
- Result laboratory; Albert Schweitzer hospital; Dordrecht Netherlands
| | | | - L. de Bruin
- Result laboratory; Albert Schweitzer hospital; Dordrecht Netherlands
| | - R. Teuns
- Result laboratory; Albert Schweitzer hospital; Dordrecht Netherlands
| | - W. van Gelder
- Result laboratory; Albert Schweitzer hospital; Dordrecht Netherlands
| | - J. Riedl
- Result laboratory; Albert Schweitzer hospital; Dordrecht Netherlands
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Kainhofer V, Smolle MA, Szkandera J, Liegl-Atzwanger B, Maurer-Ertl W, Gerger A, Riedl J, Leithner A. The width of resection margins influences local recurrence in soft tissue sarcoma patients. Eur J Surg Oncol 2016; 42:899-906. [PMID: 27107792 DOI: 10.1016/j.ejso.2016.03.026] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [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: 02/04/2016] [Revised: 03/04/2016] [Accepted: 03/21/2016] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Patients with soft tissue sarcoma (STS) being treated following the standardized guidelines can still not be guaranteed to remain free from local recurrence (LR). A complete tumour resection has been accepted as a major prognostic factor for LR. This retrospective study was designed to analyse the influence of two different classifications of resection margins (R-classification and UICC-classification) on LR in STS patients. MATERIALS AND METHODS Of 411 patients treated at our institution for STS, 265 were eligible for statistical analysis. Kaplan-Meier curves and Cox regression models were used to assess the impact of an R0 resection according to the R-classification (resection margin clear but allowing <1 mm) and according to the UICC-classification (minimal resection margin ≥1 mm) on LR. RESULTS Survival curves showed a lower LR rate for R0 resections in the UICC-classification, namely 1.3%, 12% and 12% as compared to 2.1%, 9.5% and 16.5% for the R-classification. In multivariate analysis calculated separately for each classification, R1 resection as defined by the R-classification (HR: 11.214; 95%CI: 2.394-52.517; p = 0.002) as well as by UICC-classification (HR: 15.634; 95%CI: 2.493-98.029; p = 0.003) remained significant. CONCLUSION In our study, margin status according to both classifications represents an independent prognostic factor for LR in patients with STS following curative surgery. Local control rates were superior after a minimal resection margin of 1 mm (R0 by UICC-classification) compared to R0 resections after the R-classification.
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Affiliation(s)
- V Kainhofer
- Department of Orthopaedic Surgery, Medical University of Graz, Auenbruggerplatz 5, 8036 Graz, Austria.
| | - M A Smolle
- Department of Orthopaedic Surgery, Medical University of Graz, Auenbruggerplatz 5, 8036 Graz, Austria.
| | - J Szkandera
- Division of Clinical Oncology, Department of Medicine, Medical University of Graz, Auenbruggerplatz 15, 8036 Graz, Austria.
| | - B Liegl-Atzwanger
- Institute of Pathology, Medical University of Graz, Auenbruggerplatz 25, 8036 Graz, Austria.
| | - W Maurer-Ertl
- Department of Orthopaedic Surgery, Medical University of Graz, Auenbruggerplatz 5, 8036 Graz, Austria.
| | - A Gerger
- Division of Clinical Oncology, Department of Medicine, Medical University of Graz, Auenbruggerplatz 15, 8036 Graz, Austria; Center for Biomarker Research in Medicine, Stiftingtalstraβe 5, 8010 Graz, Austria.
| | - J Riedl
- Division of Clinical Oncology, Department of Medicine, Medical University of Graz, Auenbruggerplatz 15, 8036 Graz, Austria.
| | - A Leithner
- Department of Orthopaedic Surgery, Medical University of Graz, Auenbruggerplatz 5, 8036 Graz, Austria.
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Riedl J, Kaider A, Marosi C, Prager G, Eichelberger B, Koder S, Panzer S, Pabinger I, Ay C. PO-63 - Exhausted platelets in cancer patients with high risk of venous thromboembolism and poor prognosis. Thromb Res 2016; 140 Suppl 1:S199-200. [PMID: 27161749 DOI: 10.1016/s0049-3848(16)30196-7] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
INTRODUCTION Platelets play a crucial role in cancer development, progression and metastatic spread of malignancy. In vitro data show that cancer cells have the ability to activate platelets, and clinical studies found increased levels of platelet activation markers in cancer patients. Moreover, platelets are thought to be involved in the development of venous thromboembolism (VTE) in cancer patients, a frequent complication of malignant disease associated with high morbidity and mortality. AIM In this study, we aimed to examine the activation status of platelets in cancer patients and investigate the association with risk of future venous thromboembolism (VTE) and mortality. MATERIALS AND METHODS In a prospective observational cohort study of cancer patients we measured pre-chemotherapy platelet P-selectin and glycoprotein (GP) IIb/IIIa expression and monocyte-platelet aggregates (MPA) in vivo and in response to ex vivo stimulation of the platelet activation receptors protease-activated receptor (PAR) -1, -4, and GPVI by whole blood flow cytometry. Primary and secondary endpoints of the study were occurrence of objectively confirmed VTE and death during 2-year follow-up, respectively. RESULTS Out of 62 patients (median age [interquartile range, IQR]: 63 [54-70] years, 48% female) with cancers of the pancreas (n=19), lung (n=18), brain (n=14), colon (n=8) and stomach (n=3), 9 (14.5%) developed VTE and 32 (51.6%) died. P-selectin, activated GPIIb/IIIa expression and MPA formation did not significantly differ between tumor sites (Kruskal Wallis test). Reduced platelet responsiveness to PAR-1 and GPVI stimulation was associated with a higher risk of VTE (hazard ratio [HR] per decile increase in %P-selectin positive platelets: 0.73 [95% confidence interval: 0.56-0.92, p=0.007] and 0.77 [0.59-0.98, p=0.034], respectively; Table 1). Further, lower platelet P-selectin and activated GPIIb/IIIa expression in vivo and in response to PAR-1, -4 and GPVI stimulation, but not MPA formation, were associated with a higher risk of death (Table 1). CONCLUSIONS Cancer patients with a poor prognosis had degranulated platelets, presumably as a consequence of previous activation. Our data suggest that platelets' continuous activation and thus exhaustion is involved in cancer-associated VTE and cancer mortality.
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Affiliation(s)
- J Riedl
- Clinical Division of Haematology and Haemostaseology, Department of Medicine I; Comprehensive Cancer Center Vienna; all Medical University of Vienna, Austria
| | - A Kaider
- Center for Medical Statistics, Informatics and Intelligent Systems
| | - C Marosi
- Clinical Division of Oncology, Department of Medicine I; Comprehensive Cancer Center Vienna; all Medical University of Vienna, Austria
| | - G Prager
- Clinical Division of Oncology, Department of Medicine I; Comprehensive Cancer Center Vienna; all Medical University of Vienna, Austria
| | - B Eichelberger
- Department of Blood Group Serology and Transfusion Medicine
| | - S Koder
- Clinical Division of Haematology and Haemostaseology, Department of Medicine I; Comprehensive Cancer Center Vienna; all Medical University of Vienna, Austria
| | - S Panzer
- Department of Blood Group Serology and Transfusion Medicine
| | - I Pabinger
- Clinical Division of Haematology and Haemostaseology, Department of Medicine I; Comprehensive Cancer Center Vienna; all Medical University of Vienna, Austria
| | - C Ay
- Clinical Division of Haematology and Haemostaseology, Department of Medicine I; Comprehensive Cancer Center Vienna; all Medical University of Vienna, Austria
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Königsbrügge O, Riedl J, Grilz E, Wiltschke C, Zielinski C, Pabinger I, Ay C. PO-01 - Congestive heart failure is an independent risk factor for venous thromboembolism and mortality in cancer patients. Thromb Res 2016; 140 Suppl 1:S176. [DOI: 10.1016/s0049-3848(16)30134-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Egelé A, van Gelder W, Riedl J. Automated detection and classification of teardrop cells by a novel RBC module using digital imaging/microscopy. Int J Lab Hematol 2015; 37:e153-6. [DOI: 10.1111/ijlh.12399] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- A. Egelé
- Result laboratory; Albert Schweitzer Hospital; Dordrecht The Netherlands
| | - W. van Gelder
- Result laboratory; Albert Schweitzer Hospital; Dordrecht The Netherlands
| | - J. Riedl
- Result laboratory; Albert Schweitzer Hospital; Dordrecht The Netherlands
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Egele A, van Gelder W, Riedl J. Automated Detection and Classification of Schistocytes by a Novel Red Blood Cell Module Using Digital Imaging/Microscopy. J Hematol 2015. [DOI: 10.14740/jh214w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Riedl J. The digital era of hematology is coming of age. MLO Med Lab Obs 2014; 46:10. [PMID: 25622441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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Springer AE, Riedl J, Esslinger S, Roth T, Glomb MA, Fauhl-Hassek C. Validated modeling for German white wine varietal authentication based on headspace solid-phase microextraction online coupled with gas chromatography mass spectrometry fingerprinting. J Agric Food Chem 2014; 62:6844-6851. [PMID: 25000414 DOI: 10.1021/jf502042c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
An untargeted analytical approach combined with chemometrics using the volatiles of German white wine was investigated regarding the usefulness for verifying botanical origin. A total of 198 wine samples of Riesling, Müller-Thurgau, Silvaner, Pinot Gris, and Pinot Blanc were examined applying headspace solid-phase microextraction online coupled with gas chromatography mass spectrometry. The resultant three-dimensional raw data were processed by available metabolomics software. After data treatment, a partial least-squares discriminant analysis (PLS-DA) model was validated. External samples were correctly classified for 97% Silvaner, 93% Riesling, 91% Pinot Gris/Blanc, and 80% Müller-Thurgau. This model was related to monoterpenoids, C13-norisoprenoids, and esters. Further, 100% prediction for a two-class model of Riesling versus Pinot Gris/Blanc was confirmed by 74 additional samples measured independently. Hence, the strategy applied was, in particular, reliable and relevant for white wine varietal classification. In addition, the superior classification performance of the Riesling class was revealed.
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Affiliation(s)
- A E Springer
- Department Safety in the Food Chain, Bundesinstitut für Risikobewertung (BfR) Federal Institue for Risk Assessment , Max-Dohrn-Straße 8-10, D-10589 Berlin, Germany
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Esslinger S, Riedl J, Fauhl-Hassek C. Potential and limitations of non-targeted fingerprinting for authentication of food in official control. Food Res Int 2014. [DOI: 10.1016/j.foodres.2013.10.015] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Vliem MJ, Ponsioen B, Schwede F, Pannekoek WJ, Riedl J, Kooistra MRH, Jalink K, Genieser HG, Bos JL, Rehmann H. 8-pCPT-2'-O-Me-cAMP-AM: an improved Epac-selective cAMP analogue. Chembiochem 2009; 9:2052-4. [PMID: 18633951 DOI: 10.1002/cbic.200800216] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Marjolein J Vliem
- Department of Physiological Chemistry, Centre for Biomedical Genetics and Cancer Genomics Centre, University Medical Center Utrecht, Universiteitsweg 100, 3584 CG Utrecht, The Netherlands
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Vliem MJ, Ponsioen B, Schwede F, Pannekoek WJ, Riedl J, Kooistra MRH, Jalink K, Genieser HG, Bos JL, Rehmann H. Cover Picture: 8-pCPT-2′-O-Me-cAMP-AM: An Improved Epac-Selective cAMP Analogue (ChemBioChem 13/2008). Chembiochem 2008. [DOI: 10.1002/cbic.200890049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Koprnova J, Beno P, Korcova J, Mrazova M, Grey E, Liskova A, Harnicarova A, Karvaj M, Koval S, Zak V, Danaj M, Streharova A, Mitterpachova E, Miklosko J, Ondrusova A, Riedl J, Kaiserova E, Prokopova V, Hornova M, Payer J, Rudinsky B, Pevalova L, Bencelova M, Hanzen J, Macekova L, Csölleyova J, Krcmery V. Bacteremia due to Pseudomonas aeruginosa: results from a 3-year national study in the Slovak Republic. J Chemother 2006; 17:470-6. [PMID: 16323434 DOI: 10.1179/joc.2005.17.5.470] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Risk factors, mortality and antimicrobial susceptibility of Pseudomonas aeruginosa bacteremias isolated from 148 patients from all University Hospitals in Slovakia were analyzed. Only 1.2% of 169 strains of P. aeruginosa were resistant to meropenem, 4.1% to piperacillin/tazobactam, 7.7% to ceftazidime as well as cefepime and 12% to amikacin. More than 30% of P. aeruginosa were resistant to ciprofloxacin. Our analysis of risk factors for antimicrobial resistance to the particular antimicrobials, indicated no difference in risk factors and outcome in cases infected with P. aeruginosa bacteremias resistant to amikacin, piperacillin/tazobactam or ceftazidime in comparison to episodes caused by P. aeruginosa due to susceptible isolates. When comparing risk factors for P. aeruginosa bacteremia in children vs. adults, cancer vs. non-cancer patients, several differences in risk factors were observed. Neither antimicrobial resistance to amikacin, ceftazidime or piperacillin/tazobactam, nor appropriateness of therapy according to two separate analyses were associated with better outcome.
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Affiliation(s)
- J Koprnova
- Dept of Medicine, University of Trnava, School of Public Health, Slovak Republic
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Abstract
AF6 is involved in the connection of membrane-associated proteins to the actin cytoskeleton. It binds to Ras-like small GTPases and is suggested to be an effector of both Ras and Rap. Here we show that knockdown of AF6 in T cells by RNA interference enhanced Rap1-induced integrin-mediated cell adhesion, whereas overexpression of AF6 had the opposite effect. Interestingly, AF6-induced inhibition of cell adhesion correlated with an increase in RapGTP levels. Like AF6, protein KIAA1849 contains a Ras association domain and interacted with Rap1. However, KIAA1849 did not inhibit Rap1-induced cell adhesion. We concluded that AF6 is a negative regulator of Rap-induced cell adhesion. We proposed that AF6 inhibits Rap-mediated cell adhesion by sequestering RapGTP in an unproductive complex and thus prevents the interaction of Rap1 not only with effectors that mediate adhesion but also with Rap GTPase-activating proteins. Thus, AF6 may buffer RapGTP in resting T cells and maintain them in a non-adherent state.
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Affiliation(s)
- Zhongchun Zhang
- Department of Physiological Chemistry and Centre of Biomedical Genetics, University Medical Centre, Utrecht 3508 AB, The Netherlands
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Ponsioen B, Zhao J, Riedl J, Zwartkruis F, van der Krogt G, Zaccolo M, Moolenaar WH, Bos JL, Jalink K. Detecting cAMP-induced Epac activation by fluorescence resonance energy transfer: Epac as a novel cAMP indicator. EMBO Rep 2005; 5:1176-80. [PMID: 15550931 PMCID: PMC1299185 DOI: 10.1038/sj.embor.7400290] [Citation(s) in RCA: 337] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2004] [Revised: 10/04/2004] [Accepted: 10/12/2004] [Indexed: 11/08/2022] Open
Abstract
Epac1 is a guanine nucleotide exchange factor for Rap1 that is activated by direct binding of cAMP. In vitro studies suggest that cAMP relieves the interaction between the regulatory and catalytic domains of Epac. Here, we monitor Epac1 activation in vivo by using a CFP-Epac-YFP fusion construct. When expressed in mammalian cells, CFP-Epac-YFP shows significant fluorescence resonance energy transfer (FRET). FRET rapidly decreases in response to the cAMP-raising agents, whereas it fully recovers after addition of cAMP-lowering agonists. Thus, by undergoing a cAMP-induced conformational change, CFP-Epac-YFP serves as a highly sensitive cAMP indicator in vivo. When compared with a protein kinase A (PKA)-based sensor, Epac-based cAMP probes show an extended dynamic range and a better signal-to-noise ratio; furthermore, as a single polypeptide, CFP-Epac-YFP does not suffer from the technical problems encountered with multisubunit PKA-based sensors. These properties make Epac-based FRET probes the preferred indicators for monitoring cAMP levels in vivo.
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Affiliation(s)
- Bas Ponsioen
- Division of Cell Biology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066CX Amsterdam, The Netherlands
- Division of Cellular Biochemistry and Centre of Biomedical Genetics, The Netherlands Cancer Institute, Plesmanlaan 121, 1066CX Amsterdam, The Netherlands
| | - Jun Zhao
- Department of Physiological Chemistry and Centre of Biomedical Genetics, UMCU, Universiteitsweg 100, 3584 CG Utrecht, The Netherlands
| | - Jurgen Riedl
- Department of Physiological Chemistry and Centre of Biomedical Genetics, UMCU, Universiteitsweg 100, 3584 CG Utrecht, The Netherlands
| | - Fried Zwartkruis
- Department of Physiological Chemistry and Centre of Biomedical Genetics, UMCU, Universiteitsweg 100, 3584 CG Utrecht, The Netherlands
| | - Gerard van der Krogt
- Division of Cell Biology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066CX Amsterdam, The Netherlands
| | - Manuela Zaccolo
- Dulbecco Telethon Institute, Venetian Institute of Molecular Medicine, Via Orus 2, 35124, Padva, Padova, Italy
| | - Wouter H Moolenaar
- Division of Cellular Biochemistry and Centre of Biomedical Genetics, The Netherlands Cancer Institute, Plesmanlaan 121, 1066CX Amsterdam, The Netherlands
| | - Johannes L Bos
- Department of Physiological Chemistry and Centre of Biomedical Genetics, UMCU, Universiteitsweg 100, 3584 CG Utrecht, The Netherlands
- Tel: +31 30 253 8988; Fax: +31 30 253 9035; E-mail:
| | - Kees Jalink
- Division of Cell Biology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066CX Amsterdam, The Netherlands
- Tel: +31 20 512 1933; Fax: +31 20 512 1944; E-mail: The first two authors contributed equally to this work
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Riedl J, Kiossis E, Müller M, Seidl S, Stolla R, Hermanns W. [Endoscopic, pathologic-anatomic and histologic findings in the bovine teat. 2. Changes in the area of Fürstenberg's rosette]. Dtsch Tierarztl Wochenschr 2004; 111:423-9. [PMID: 15573777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
In the present study endoscopically diagnosed changes of the Fürstenberg's rosette were examined histologically. For this purpose the teats of 200 slaughtered cows were inspected. In 19 cases proliferations in the region of the Fürstenberg's rosette were found. Additionally, tissue samples were taken from the Fürstenberg's rosette of 26 cows which showed milk flow disorders due to stenoses of this part of the teat. Teats of slaughtered cows as well as biopsy specimens were fixed in 5% formaldehyde and embedded in paraffin and in plastic. All specimens were stained according to H.E., Giemsa and Turnbull, respectively. Histologically, the proliferations of the Fürstenberg's rosette consisted of fibrovascular tissue (granulation tissue) covered by keratinized squamous epithelium (teat canal epithelium) in eleven cases. In the other cases double-layered cuboid epithelium (cisternal epithelium) was found additionally. The formation of granulation tissue and deposition of blood pigment was observed exclusively in areas covered by stratified epithelium. Therefore a traumatic lesion of the teat canal was supposed to be the cause of the histological findings. In contrast to several reports in the literature, however, no indications of an inversion of the teat canal epithelium were found. On the basis of these findings, the hitherto assumed idea of pathogenesis of proliferations of the Fürstenberg's rosette was modified and a new pathogenesis pattern was developed.
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Affiliation(s)
- J Riedl
- Gynäkologische und Ambulatorische Tierklinik, Ludwig-Maximilians-Universität, München
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Riedl J, Kiossis E, Müller M, Seidl S, Stolla R, Hermanns W. [Endoscopic, pathologic-anatomic and histologic findings in the bovine teat. 1. Changes in the area of the teat cistern in slaughtered cows]. Dtsch Tierarztl Wochenschr 2004; 111:383-9. [PMID: 15568635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
In the present study 795 teats of slaughtered cows were examined endoscopically. Teats which showed lesions were examined histologically. Abnormalities were detected endoscopically in 37 teats. In five cases red discolorations were observed. Histologically these alterations proved to be fresh bleedings within the fibromuscular layer of the teat cistern. Thirteen teats showed yellowish discolorations of the cistern surface. Three of these cases could not be cleared up histologically. In the other cases moderate or severe blood pigment deposition (n = 10) or severe fibrosis (n = 3) of the fibromuscular layer were found. Neither fresh bleeding nor severe blood pigment deposition was found in teats with normal coloured epithelium of the cistern. Cistern surface was smooth in 18 cases, whereas in 19 cases nodules were found. Histologically all nodules consisted of fibrovascular tissue ("granulation tissue") covered with cisternal epithelium. Detailed histological examinations, however, revealed considerable morphological variations regarding the overlying epithelium, the extent and kind of cellular infiltration, the extent of angioplasia and fibroplasia as well as fresh bleedings or deposition of blood pigment in the underlying fibrovascular tissue in some cases. It was concluded, that teat endoscopy enables a differentiation between fresh and old bleedings according to the coloration of the cisternal surface. Nodular proliferations of the cistern surface generally consists of fibrovascular ("granulation") tissue. Further histological details, however, and thus possible information about the pathogenesis of the lesions cannot be assessed endoscopically.
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Affiliation(s)
- J Riedl
- Gynäkologische und Ambulatorische Tierklinik, Ludwig-Maximilians-Universität, München
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Bos JL, de Bruyn K, Enserink J, Kuiperij B, Rangarajan S, Rehmann H, Riedl J, de Rooij J, van Mansfeld F, Zwartkruis F. The role of Rap1 in integrin-mediated cell adhesion. Biochem Soc Trans 2003; 31:83-6. [PMID: 12546659 DOI: 10.1042/bst0310083] [Citation(s) in RCA: 164] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Rap1 is a member of the Ras-like small GTPases. Originally the protein was identified in a genome-wide screen for suppressors of Ras transformation, but the mechanism of this reversion remained elusive. We have investigated the signalling function of Rap1. We observed that Rap1 is activated by a large variety of stimuli, including growth factors, neurotransmitters and cytokines. Common second messengers like cAMP, diacylglycerol and calcium are mediators of this activation. These messengers activate guanine nucleotide exchange factors (GEFs), the most notable of which is Epac (exchange protein directly activated by cAMP). However, the downstream effectors of Rap1 are less clear. Although direct connections of Rap1 with the serine/threonine kinases Raf1 and B-raf have been reported, we were unable to find functional evidence for an interaction of endogenous Rap1 signalling with the Raf/extracellular-signal-regulated kinase (ERK) pathway. Instead we observe a clear connection of Rap1 with inside-out signalling to integrins. Indeed, introduction of a constitutively active Rap1 as well as Epac induces integrin-mediated cell adhesion, whereas inhibition of Rap1 signalling by the introduction of Rap1GAP (GTPase-activating protein) inhibits inside-out activation of integrins. More importantly, activation of a G(s)-protein-coupled receptor results in integrin-mediated cell adhesion, by a pathway involving Epac and Rap1. From these results, we conclude that one of the functions of receptor-induced Rap1 activation is inside-out regulation of integrins.
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Affiliation(s)
- J L Bos
- Department of Physiological Chemistry and Centre for Biomedical Genetics, University Medical Center Utrecht, Universiteitsweg 100, 3584 CG Utrecht, The Netherlands.
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Werckenthin C, Seidl S, Riedl J, Kiossis E, Wolf G, Stolla R, Kaaden OR. Escherichia coli isolates from young calves in Bavaria: in vitro susceptibilities to 14 anti-microbial agents. J Vet Med B Infect Dis Vet Public Health 2002; 49:61-5. [PMID: 11911595 DOI: 10.1046/j.1439-0450.2002.00538.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [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
During the occasional testing of Escherichia coli from faecal samples of young calves we observed multi-resistant isolates. Because of the significance of E. coli as an indicator bacterium for resistance trends we tested E. coli populations of young calves over a longer period. Here we present the results of a retrospective study comparing isolates from 1998 to 2000. Moreover, we compared, in a clinical study, the resistance rates of E. coli populations from 67 hospitalized calves both before and after hospitalization (with or without anti-microbial therapy), and with their anamnestic data of antibiotic usage. The highest resistance rates were found to be more than 80% for tetracyclines, ampicillin, sulfonamide/trimethoprim combinations, and chloramphenicol. A significant increase or decrease over the years was not observed. In analysing the data of hospitalized calves, an increase of resistance to some anti-microbials had to be registered that seemed to be connected with the selective pressure due to agents used in the clinic. In comparing anamnestic data and resistance rates it became obvious that reliable data are not easily available and that a number of potential anti-microbial influence factors have to be taken into account.
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Affiliation(s)
- C Werckenthin
- Institut für Medizinische Mikrobiologie, Infektions- und Seuchenmedizin, Ludwig-Maximilians-Universität München, Munich, Germany.
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Hackl W, Riedl J, Reichkendler M, Benedetto KP, Freund M, Bale R. [Preoperative computerized tomography diagnosis of fractures of the tibial plateau]. Unfallchirurg 2001; 104:519-23. [PMID: 11460457 DOI: 10.1007/s001130170115] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Within the last decade computed tomography has become an important instrument for skeletal diagnosis. In this study the value of helical CT-scan was compared with plan X-rays and conventional tomography in 45 patients having sustained an intraarticular tibia plateau fracture. Between plan roentgenogramms and CT-scan the fracture classification according to the AO-classification was changed in 40% of all patients, in 39 cases the amount of impression or dislocation increased with a mean of 4.2 mm. Especially tiny fragments were better visible and therefore responsible for the shift of many B1 fractures to group B3. The difference between conventional tomography and computed tomography was less impressive, a change of fracture classification could be observed in only 6.7% of all cases.
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Affiliation(s)
- W Hackl
- Universitätsklinik für Unfallchirurgie Innsbruck, Anichstrasse 35, 6020 Innsbruck, Osterreich.
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Riedl J, Daffner BL, Kiossis E, Bruckmaier RM, Stolla R. Aetiology of reduced milk ejection in cows after transport and the use of a long-acting analogue of oxytocin for prophylaxis. Vet Rec 2001; 148:653-6. [PMID: 11400985 DOI: 10.1136/vr.148.21.653] [Citation(s) in RCA: 3] [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: 11/03/2022]
Abstract
Milk flow was recorded in 21 cows for three days after they were admitted to a large animal hospital. When the spontaneous flow of milk had stopped, a physiological dose (1 iu) of oxytocin was administered intravenously. Five of the cows were, in addition, treated with 0.35 mg of a long-acting analogue of oxytocin (carbetocin) one hour before the first milking after they were admitted. In the 16 cows not treated with carbetocin, only about 30 per cent of the total milk yield was released spontaneously on the first day, and the injection of 1 iu of oxytocin released approximately another 60 per cent of the total milk yield. On the second day, the proportion of the total milk yield released spontaneously increased and the fraction released after the injection of 1 iu oxytocin decreased. In contrast, the five cows treated with carbetocin released on average 94 per cent of the total milk yield spontaneously during the first milking.
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Affiliation(s)
- J Riedl
- Gynäkologische und Ambulatorische Tierklinik, Universität München, Germany
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Abstract
Dietary fiber may be partly responsible for the lower bioavailability of carotenoids from food than from purified supplements. Due to the lack of detailed information available, we investigated the effects of different kinds of dietary fiber on the absorption of carotenoids and alpha-tocopherol. Six healthy young women received an antioxidant mixture consisting of beta-carotene, lycopene, lutein, canthaxanthin and alpha-tocopherol together with a standard meal. The meal did not contain additional dietary fiber or was enriched with pectin, guar, alginate, cellulose or wheat bran (0. 15 g. kg body weight(-1)). The increases in plasma carotenoid and alpha-tocopherol concentrations were followed over 24 h, and the areas-under-curves (AUC(24h)) were calculated. The mean AUC(24h) of beta-carotene was significantly (P < 0.05) reduced by the water-soluble fibers pectin, guar and alginate with a mean decrease of 33-43%. All tested fibers significantly reduced the AUC(24h) of lycopene and lutein by 40-74% (P < 0.05). The dietary fiber effect on the AUC(24h) of canthaxanthin was almost significant (P = 0.059) and there was no effect on the AUC(24h) of alpha-tocopherol. We conclude that the bioavailability of beta-carotene, lycopene and lutein given within a mixed supplement is markedly reduced by different kinds of dietary fiber.
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Affiliation(s)
- J Riedl
- Institute of Nutrition Science, Technical University of Munich, Freising-Weihenstephan, Germany
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Hoffmann J, Linseisen J, Riedl J, Wolfram G. Dietary fiber reduces the antioxidative effect of a carotenoid and alpha-tocopherol mixture on LDL oxidation ex vivo in humans. Eur J Nutr 1999; 38:278-85. [PMID: 10784384 DOI: 10.1007/s003940050078] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Antioxidant concentrations in low density lipoproteins (LDL) are an important determinant for their susceptibility to oxidation and can be modulated by dietary intake. AIM OF THE STUDY In the present study, the influence of dietary fiber on the antioxidant enrichment and the oxidation resistance of LDL after antioxidant supplementation is investigated. METHOD An antioxidant supplement consisting of beta-carotene, lycopene, lutein, canthaxanthin and alpha-tocopherol was given to six young women together with a standard meal. Using a cross-over study design, each subject received the standard meal without additional dietary fiber and enriched with pectin, guar, or cellulose in a random order. To determine the resistance of LDL against copper ion-induced oxidation, the formation of conjugated dienes was measured. RESULTS Eight, 10, and 24 hours after antioxidant supplementation the isolated LDL revealed significantly (p < 0.05) increased antioxidant concentrations; addition of pectin, guar, or cellulose to the meal depressed this increase. Concomitantly, the observed increase in the resistance of LDL against oxidation (measured as lag phase) was lower with dietary fiber supplementation than that found without. On average, pectin, guar, and cellulose reduced the increase of the lag phase (measured without addition of dietary fiber) by 38%, 22%, and 18%, respectively. CONCLUSIONS These results indicate that dietary fiber supplementation decreases the antioxidative effect of a supplement consisting of carotenoids and alpha-tocopherol in LDL, an effect that is likely to be mediated by a reduced bioavailability of these antioxidants in the gut.
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Affiliation(s)
- J Hoffmann
- Institute of Nutritional Sciences, Technical University of Munich
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Stojkovic M, Büttner M, Zakhartchenko V, Riedl J, Reichenbach HD, Wenigerkind H, Brem G, Wolf E. Secretion of interferon-tau by bovine embryos in long-term culture: comparison of in vivo derived, in vitro produced, nuclear transfer and demi-embryos. Anim Reprod Sci 1999; 55:151-62. [PMID: 10379668 DOI: 10.1016/s0378-4320(99)00015-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Interferon-tau (IFNtau) is the pregnancy recognition signal of bovine embryos, inhibiting luteolysis. We studied trophoblastic growth and IFNtau secretion of embryos with different developmental potential, i.e., in vivo derived and in vitro produced embryos, cloned embryos and demi-embryos, to evaluate if the ability of secreting IFNtau might be responsible for differences in pregnancy rates after transfer of these categories of embryos to recipients. Day 8 embryos of excellent quality were individually placed in microdrops of buffalo rat liver cell-conditioned medium and maintained for up to 23 days. Embryos were observed on Days 11, 15, 19 and 23, the mean diameter (2r) of attached and spherical embryos was measured, and their trophoblastic area was calculated as r2pi or 4r2pi, respectively. Simultaneously, medium was changed and the IFNtau levels of conditioned media were determined using a bioassay of antiviral activity. Trophoblastic area was smaller (P < 0.05) in demi-embryos than in all other groups, which exhibited similar trophoblastic growth until Day 19. However, on Day 23 trophoblastic area of in vivo derived embryos was more than twice (P < 0.05) as large as those of in vitro produced and nuclear transfer (NT) embryos. IFNtau levels increased only slowly with time in culture of demi-embryos. By contrast, the level of IFNtau doubled from Day 11 to Day 15 in conditioned media from all other groups of embryos. The linear increase in IFNtau production of vivo and in vitro derived embryos continued until the end of the culture period, whereas conditioned media from NT embryos contained significantly (P < 0.05) less IFNtau activity on Days 19 and 23 than those of the former two groups. Our results demonstrate different capabilities of secreting IFNtau for in vivo derived and in vitro produced embryos vs. NT and demi-embryos, which may--at least part--be responsible for the differences in pregnancy rates after transfer to recipients.
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Affiliation(s)
- M Stojkovic
- Department of Molecular Animal Breeding and Genetics, Ludwig-Maximilian University, Munich, Germany
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