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Reimann A, Beyer R, Mumm R, Scheffler C. Reference tables with centiles of limb to body height ratios of healthy human adults for assessing potential thalidomide embryopathy. Anthropol Anz 2019; 76:391-400. [PMID: 30869735 DOI: 10.1127/anthranz/2019/0981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 01/28/2019] [Accepted: 01/31/2019] [Indexed: 11/05/2022]
Abstract
Background: Over 60 years ago the biggest drug catastrophe in Germany took place. The drug thalidomide, sold by the German pharmaceutical company Chemie Grünenthal GmbH starting in 1957 under the name "Contergan", caused severe birth defects in newborns. Chemie Grünenthal withdraw Contergan in 1961. Until nearly 30 years later in 1988 there were already over 10.000 children born with severe birth defects (e.g. dysmelia, amelia, congenital heart defect). Due to the high variability of the birth defects caused by thalidomide, later called thalidomide embryopathy, there is still no detailed information about the proportions of limbs. Aim: The aim is to develop reference centiles for limb measurements of men and women aged 19-70 years old. Method: For the calculation, data of healthy men and women (m = 2984, f = 2838) from former East Germany were used and centiles using the LMS-method were developed. Results: Centile tables for arm and leg length of men and women are presented in the results. The variability is small due to a homogeneous distribution of the measurements. A test with randomly chosen patient data shows that women under 171 cm stature and men under 180 cm stature can be assessed correctly. A severe shortening of limbs can be detected with this method.
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Affiliation(s)
- Anna Reimann
- University of Potsdam, Human Biology, Potsdam, Germany
| | | | - Rebekka Mumm
- University of Potsdam, Human Biology, Potsdam, Germany
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Hermanussen M, Pulungan AB, Scheffler C, Mumm R, Rogol AD, Pop R, Swanson JM, Sonuga-Barke E, Reimann A, Siniarska-Wolanska A, Musalek M, Bogin B, Boldsen JL, Tassenaar PGV, Groth D, Liu YC, Meigen C, Quanjer B, Thompson K, Özer BK, Bryl E, Mamrot P, Hanć T, Koziel S, Söderhäll J, Gomula A, Banik SD, Roelants M, Veldre G, Lieberman LS, Sievert LL. Meeting Report: The Role of Beliefs and Perception on Body Size. Proceedings of the 26th Aschauer Soiree, Held at Aschauhof, Altenhof, Germany, May 26th, 2018. Pediatr Endocrinol Rev 2019; 16:383-400. [PMID: 30888128 DOI: 10.17458/per.vol16.2019.hps.mr.26achauersoiree] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Thirty-one scientists met at Aschauhof, Germany to discuss the role of beliefs and self-perception on body size. In view of apparent growth stimulatory effects of dominance within the social group that is observed in social mammals, they discussed various aspects of competitive growth strategies and growth adjustments. Presentations included new data from Indonesia, a cohort-based prospective study from Merida, Yucatan, and evidence from recent meta-analyses and patterns of growth in the socially deprived. The effects of stress experienced during pregnancy and adverse childhood events were discussed, as well as obesity in school children, with emphasis on problems when using z-scores in extremely obese children. Aspects were presented on body image in African-American women, and body perception and the disappointments of menopause in view of feelings of attractiveness in different populations. Secular trends in height were presented, including short views on so called 'racial types' vs bio-plasticity, and historic data on early-life nutritional status and later-life socioeconomic outcomes during the Dutch potato famine. New tools for describing body proportions in patients with variable degrees of phocomelia were presented along with electronic growth charts. Bio-statisticians discussed the influence of randomness, community and network structures, and presented novel tools and methods for analyzing social network data.
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Affiliation(s)
| | - Aman B Pulungan
- Department of Child Health, Faculty of Medicine University of Indonesia-Ciptomangunkusumo Hospital, Jakarta 10430, Indonesia
| | | | - Rebekka Mumm
- University of Potsdam, Human Biology, 14469 Potsdam, Germany
| | - Alan D Rogol
- The James Whitcomb Riley Hospital for Children, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Raluca Pop
- Univ. Medicine and Pharmacy, Tirgu Mures, Romania
| | - James M Swanson
- Department of Pediatrics, University of California, Irvine, CA 92617 USA
| | | | - Anna Reimann
- University of Potsdam, Human Biology, 14469 Potsdam, Germany
| | | | - Martin Musalek
- Dept Kinanthropology and Humanities, Charles University, 162 52 Prague 6 - Veleslavin, Czech Republic
| | - Barry Bogin
- School of Sport, Exercise and Health Sciences, Loughborough University, LE11 3TU UK
| | - Jesper L Boldsen
- Unit of Anthropology (ADBOU), Department of Forensic Medicine, University of Southern Denmark, DK-52600 Odense S, Denmark
| | | | - Detlef Groth
- University of Potsdam, Institute of Biochemistry and Biology, 14476 Potsdam-Golm, Germany
| | - Yuk-Chien Liu
- University of Potsdam, Institute of Biochemistry and Biology, 14476 Potsdam-Golm, Germany
| | - Christof Meigen
- Deutsches Zentrum für Neurodegenerative Erkrankungen, 53175 Bonn, Germany
| | - Björn Quanjer
- Radboud University Nijmegen, Radboud Group for Historical Demography and Family History, Nijmegen, The Netherlands
| | | | - Başak Koca Özer
- Ankara University, Faculty of Languages, History and Geography, Department of Anthropology, 06100 Sıhhiye, Ankara, Turkey
| | - Ewa Bryl
- Department of Human Biological Development, Institute of Anthropology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Paula Mamrot
- Department of Human Biological Development, Institute of Anthropology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Tomasz Hanć
- Department of Human Biological Development, Institute of Anthropology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Slawomir Koziel
- Department of Anthropology, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | | | - Aleksandra Gomula
- Department of Anthropology, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | | | - Mathieu Roelants
- Environment and Health, Department of Public Health and Primary Care, KU Leuven - University of Leuven, Belgium
| | - Gudrun Veldre
- Department of Cardiology, University of Tartu, 8L Puusepa Str, 51014 Tartu, Estonia
| | | | - Lynnette Leidy Sievert
- Department of Anthropology, University of Massachussetts at Amherst, Amherst MA 01003-9278, USA
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Mauri V, Frohn T, Deuschl FG, Reimann A, Koerber MI, Kuhn E, Baldus S, Wahlers T, Rudolph V, Madershahian N, Schaefer U, Rudolph TK. P6310Impact of device landing zone calcification on paravalvular regurgitation after transcatheter aortic valve replacement with different next generation devices. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6310] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- V Mauri
- Cologne University Hospital - Heart Center, Cologne, Germany
| | - T Frohn
- Cologne University Hospital - Heart Center, Cologne, Germany
| | - F G Deuschl
- University Heart Center Hamburg, Department of General and Interventional Cardiology, Hamburg, Germany
| | - A Reimann
- Cologne University Hospital - Heart Center, Cologne, Germany
| | - M I Koerber
- Cologne University Hospital - Heart Center, Cologne, Germany
| | - E Kuhn
- Cologne University Hospital - Heart Center, Cologne, Germany
| | - S Baldus
- Cologne University Hospital - Heart Center, Cologne, Germany
| | - T Wahlers
- Cologne University Hospital - Heart Center, Cologne, Germany
| | - V Rudolph
- Cologne University Hospital - Heart Center, Cologne, Germany
| | - N Madershahian
- Cologne University Hospital - Heart Center, Cologne, Germany
| | - U Schaefer
- University Heart Center Hamburg, Department of General and Interventional Cardiology, Hamburg, Germany
| | - T K Rudolph
- Cologne University Hospital - Heart Center, Cologne, Germany
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Goldbeck L, Fidika A, Heuer HE, Junge S, Smaczny C, Reimann A. WS09.3 Professional quality of life among CF healthcare providers. J Cyst Fibros 2015. [DOI: 10.1016/s1569-1993(15)30054-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Gögebakan Ö, Albrecht T, Osterhoff M, Reimann A. Is mesenteric panniculitis truely a paraneoplastic phenomenon? A matched pair analysis. Eur J Radiol 2013; 82:1853-9. [DOI: 10.1016/j.ejrad.2013.06.023] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 05/30/2013] [Accepted: 06/26/2013] [Indexed: 10/26/2022]
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Baier M, Ullrich M, Dinkel J, Schoenahl F, Lützen U, Hoffmann B, Zeintl J, Linke R, Schmidt D, Reimann A, Cavallaro A, Stein K, Graf T, Thierfelder C, Kaepplinger S, Henze E, Heller M, Kuwert T, Bianco J, Kauczor HU, Biederer J. Bewegungsadaptierte Schwächungskorrektur mit Averaging-CT und 4D-CT im 4D PET-CT der Lunge. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1329788] [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: 10/27/2022]
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Ullrich M, Baier M, Dinkel J, Schoenahl F, Lützen U, Hoffmann B, Zeintl J, Linke R, Schmidt D, Reimann A, Cavallaro A, Stein K, Graf T, Thierfelder C, Kaepplinger S, Henze E, Heller M, Kuwert T, Bianco J, Kauczor HU, Biederer J. Einfluss von Partialvolumeneffekten, Schwächungskorrektur und – Bewegungsartefakten auf die Aktivitäts- und Volumenbestimmung von Rundherden in der 18F-Positronen-Emissionstomografie der Lunge. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1329789] [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: 10/27/2022]
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Geishauser T, Linhart N, Neidl A, Reimann A. Factors associated with ruminal pH at herd level. J Dairy Sci 2012; 95:4556-67. [DOI: 10.3168/jds.2012-5380] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Accepted: 04/14/2012] [Indexed: 11/19/2022]
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Pecha S, Reimann A, Burgstahler C, Treede H, Yildirim Y, Reichenspurner H, Claussen C. Prognostic value of coronary artery stenosis detection using multi-slice computed tomography for major adverse cardiac events: a 24 month follow up. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297564] [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: 10/14/2022]
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Pecha S, Reimann A, Burgstahler C, Treede H, Tsiflikas I, Reichenspurner H, Claussen CD. Prognostic value of computed tomography coronary angiography in patients with known or suspected coronary artery disease: A 12-month follow-up study. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1268947] [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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Thomas C, Korn A, Krauss B, Ketelsen D, Tsiflikas I, Reimann A, Brodoefel H, Claussen C, Kopp A, Ernemann U, Heuschmid M. Automatic bone and plaque removal using dual energy CT for head and neck angiography: Feasibility and initial performance evaluation. Eur J Radiol 2010; 76:61-7. [DOI: 10.1016/j.ejrad.2009.05.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Revised: 04/01/2009] [Accepted: 05/04/2009] [Indexed: 10/20/2022]
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Thomas C, Krauss B, Schilling D, Ketelsen D, Tsiflikas I, Reimann A, Claussen C, Schlemmer HP, Heuschmid M. Differenzierung von Harnsteinen mit Dual Energy CT: Effekt einer verbesserten spektralen Separierung durch zusätzliche Filterung des Hochenergie-Spektrums. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Thomas C, Schilling D, Ketelsen D, Tsiflikas I, Reimann A, Nagele U, Hennenlotter J, Claussen C, Heuschmid M, Schlemmer HP. Die Niedrigdosis-Dual-Energy-CT kann Harnsteine mit einer Dosis vergleichbar mit einer konventionellen intravenösen Pyelographie differenzieren. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Rörick O, Seitz T, Reimann A, Feyrer R, Weyand M. Sorin Freedom Solo® vs. Edwards Mitroflow®: a one year follow up. Thorac Cardiovasc Surg 2010. [DOI: 10.1055/s-0029-1246724] [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: 10/20/2022]
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Brodoefel H, Burgstahler C, Heuschmid M, Reimann A, Khosa F, Kopp A, Schroeder S, Claussen CD, Clouse ME. Accuracy of dual-source CT in the characterisation of non-calcified plaque: use of a colour-coded analysis compared with virtual histology intravascular ultrasound. Br J Radiol 2009; 82:805-12. [PMID: 19332517 DOI: 10.1259/bjr/35768497] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Non-invasive assessment of plaque volume and composition is important for risk stratification and long-term studies of plaque stabilisation. Our aim was to evaluate dual-source computed tomography (DSCT) and colour-coded analysis in the quantification and classification of coronary atheroma. DSCT and virtual histology intravascular ultrasound (IVUS-VH) were prospectively performed in 14 patients. 22 lesions were compared in terms of plaque volume, maximal per cent vessel stenosis and percentages of fatty, fibrous or calcified components. Plaque characterisation was performed with software that automatically segments luminal or outer vessel boundaries and uses CT attenuation for a colour-coded plaque analysis. Good correlation was found for per cent vessel stenosis in DSCT (53+/-13%) and IVUS (51+/-14%; r(2) = 0.70). Mean volumes for entire plaque and non-calcified atheroma were 68.5+/-33 mm(3) and 56.7+/-30 mm(3), respectively, in DSCT and 60.8+/-29 mm(3) and 55.8+/-26 mm(3), respectively, in IVUS. Mean percentages of fatty, fibrous or calcified components were 28.2+/-6%, 53.2+/-9% and 18.7+/-13%, respectively, in DSCT and 29.9+/-5%, 55.3+/-12% and 14.4+/-9%, respectively, in IVUS-VH. Significant overestimation was present for the entire plaque and the volume of calcified plaque (p = 0.03; p = 0.0004). Although good correlation with IVUS was obtained for the entire plaque (r(2) = 0.76) and non-calcified plaque volume (r(2) = 0.84), correlation proved very poor and insignificant for percentage plaque composition. Interclass correlation coefficients for non-calcified plaque volume and percentages of fatty, fibrous or calcified components were 0.99, 0.99, 0.95 and 0.98, respectively, and intraclass coefficients were 0.98, 0.93, 0.98 and 0.99, respectively. We found that using Hounsfield unit-based analysis, DSCT allows for accurate quantification of non-calcified plaque. Although percentage plaque composition proves highly reproducible, it is not correlated with IVUS-VH.
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Affiliation(s)
- H Brodoefel
- Department of Radiology, Beth Israel Deaconess Medical Centre, Boston, MA, USA.
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Biederer J, Dinkel J, Hoffmann B, Lützen U, Tetzlaff R, Zeintl J, Linke R, Schmidt D, Reimann A, Cavallaro A, Stein K, Graf T, Thierfelder C, Kaepplinger S, Henze E, Heller M, Kauczor HU, Kuwert T, Bianco J. Analyse von Bildqualität und Artefakten aus respiratorisch gegateten 4D-PET-CT der Lunge: Vergleich mit statischen Datensätzen in definierter Atemlage. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1208354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ketelsen D, Werner MK, Thomas C, Tsiflikas I, Koitschev A, Reimann A, Claussen CD, Heuschmid M. Image quality analysis to reduce dental artifacts in head and neck imaging with dual-source computed tomography. ROFO-FORTSCHR RONTG 2008; 181:54-9. [PMID: 19085690 DOI: 10.1055/s-2008-1027883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
PURPOSE Important oropharyngeal structures can be superimposed by metallic artifacts due to dental implants. The aim of this study was to compare the image quality of multiplanar reconstructions and an angulated spiral in dual-source computed tomography (DSCT) of the neck. MATERIALS AND METHODS Sixty-two patients were included for neck imaging with DSCT. MPRs from an axial dataset and an additional short spiral parallel to the mouth floor were acquired. Leading anatomical structures were then evaluated with respect to the extent to which they were affected by dental artifacts using a visual scale, ranging from 1 (least artifacts) to 4 (most artifacts). RESULTS In MPR, 87.1 % of anatomical structures had significant artifacts (3.12 +/- 0.86), while in angulated slices leading anatomical structures of the oropharynx showed negligible artifacts (1.28 +/- 0.46). The diagnostic growth due to primarily angulated slices concerning artifact severity was significant (p < 0.01). CONCLUSION MPRs are not capable of reducing dental artifacts sufficiently. In patients with dental artifacts overlying the anatomical structures of the oropharynx, an additional short angulated spiral parallel to the floor of the mouth is recommended and should be applied for daily routine. As a result of the static gantry design of DSCT, the use of a flexible head holder is essential.
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Affiliation(s)
- D Ketelsen
- Abteilung für Diagnostische und Interventionelle Radiologie, Eberhard-Karls-Universität Tübingen.
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Brodoefel H, Reimann A, Burgstahler C, Schumacher F, Herberts T, Tsiflikas I, Schroeder S, Claussen CD, Kopp AF, Heuschmid M. Noninvasive coronary angiography using 64-slice spiral computed tomography in an unselected patient collective: Effect of heart rate, heart rate variability and coronary calcifications on image quality and diagnostic accuracy. Eur J Radiol 2008; 66:134-41. [PMID: 17600648 DOI: 10.1016/j.ejrad.2007.05.013] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2006] [Revised: 05/14/2007] [Accepted: 05/16/2007] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The aim of this study was to assess the impact of heart rate, heart rate variability and calcification on image quality and diagnostic accuracy in an unselected patient collective. SUBJECTS AND METHODS One hundred and two consecutive patients with known or suspected coronary artery disease underwent both 64-MSCT and invasive coronary angiography. Image quality (IQ) was assessed by independent observers using a 4-point scale from excellent (1) to non-diagnostic (4). Accuracy of MSCT regarding detection or exclusion of significant stenosis (>50%) was evaluated on a per segment basis in a modified AHA 13-segment model. Effects of heart rate, heart rate variability, calcification and body mass index (BMI) on IQ and accuracy were evaluated by multivariate regression. IQ and accuracy were further analysed in subgroups of significant predictor variables and simple regression performed to calculate thresholds for adequate IQ. RESULTS Mean heart rate was 68.2+/-13.3 bpm, mean heart rate variability 11.5+/-16.0 beats per CT-examination (bpct) and median Agatston score 226.5. Average IQ score was 2+/-0.6 whilst diagnostic quality was obtained in 89% of segments. Overall sensitivity, specificity, PPV or NPV was 91.2%, 99.2%, 95.3% or 98.3%. According to multivariate regression, overall IQ was significantly related to heart rate and calcification (P=0.0038; P<0.0001). The effect of heart rate variability was limited to IQ of RCA segments (P=0.018); BMI was not related to IQ (P=0.52). Calcification was the only predictor variable with significant effect on the number of non-diagnostic segments (P<0.0001). In a multivariate regression, calcification was also the single factor with impact on diagnostic accuracy (P=0.0049). CONCLUSION Whilst heart rate, heart rate variability and calcification all show an inverse correlation to IQ, severe calcium burden remains the single factor with translation of such effect into decrease of diagnostic accuracy.
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Affiliation(s)
- H Brodoefel
- Department of Diagnostic Radiology, Eberhard-Karls-University, Hoppe-Seyler-Str. 3, 72076 Tübingen, Germany.
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Heuschmid M, Reimann A, Burgstahler C, Brodoefel H, Schröder S, Tsiflikas I, Claussen CD, Kopp AF. Dual-Source Computertomographie in der Diagnostik der koronaren Herzkrankheit: Erste Erfahrungen bei unselektierten Patienten. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-976881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Tsiflikas I, Reimann A, Burgstahler C, Schroeder S, Heuschmid M, Kopp AF, Claussen CD. Einfluss der lipidsenkenden Therapie auf die Koronarsklerose bei Personen mit erhöhtem Risiko für ein Akutes Koronares Ereignis bewertet durch MDCT. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-976949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Brodoefel H, Klumpp B, Reimann A, Fenchel M, Heuschmid M, Miller S, Schroeder S, Claussen C, Scheule AM, Kopp AF. Sixty-four-MSCT in the characterization of porcine acute and subacute myocardial infarction: determination of transmurality in comparison to magnetic resonance imaging and histopathology. Eur J Radiol 2006; 62:235-46. [PMID: 17187952 DOI: 10.1016/j.ejrad.2006.11.031] [Citation(s) in RCA: 35] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2006] [Revised: 11/22/2006] [Accepted: 11/24/2006] [Indexed: 02/07/2023]
Abstract
OBJECTIVE The aim of this study was to assess the accuracy of MSCT in characterizing myocardial infarction (MI) and, thereby, determine the extent of early perfusion defect (ED), microvascular obstruction (MO) and transmural depth of late enhancement (LE) in comparison to MRI and histology. MATERIALS AND METHODS Seven pigs were studied with MSCT (Somatom Sensation 64) and MRI (Magnetom Sonata) a median 1 and 21 days following temporary occlusion of a diagonal branch and creation of small reperfused infarction. For depiction of ED, CT images were acquired in the early arterial phase and following 35 s; LE and MO were evaluated on images obtained at 3, 5, 10 and 15 min. Thereby, a bolus/low-flow contrast injection protocol was used. Triphenyltetrazolium-chloride (TTC) stain and histology were obtained. Volumes of enhancement patterns were assessed as percentage of the ventricle and compared by Bland-Altman analysis. Segmental co-localization and graded transmurality was evaluated with weighted-kappa-test. RESULTS Close spatial agreement was observed for MRI-MO and MSCT-MO (bias=0.55; CI=-1.49 to 2.60 at 5 min MSCT), TTC and MSCT-LE (bias=-1.28; CI=-3.76 to 1.19) or MRI-LE and MSCT-LE (bias=-0.79; CI=-4.19 to 2.60). There was good segmental co-localization for MO (weighted kappa=0.93) and high agreement for transmural extent of TTC, MRI-LE and MSCT-LE (weighted kappa=0.84 TTC versus MSCT; 0.86 MRI versus MSCT). Arterial and 35s ED significantly underestimated infarct size and showed poor segmental or transmural agreement (weighted kappa=0.33; 0.44). CONCLUSIONS MSCT late-scans not only reliably depict size of MO and LE in acute or subacute infarct phases but, moreover, allow for accurate determination of LE transmurality.
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Affiliation(s)
- H Brodoefel
- Department of Diagnostic Radiology, Eberhard-Karls-University, Hoppe-Seyler-Str. 3, 72076 Tübingen, Germany.
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Brodoefel H, Klumpp B, Reimann A, Ohmer M, Fenchel M, Schroeder S, Miller S, Claussen C, Kopp AF, Scheule AM. Late myocardial enhancement assessed by 64-MSCT in reperfused porcine myocardial infarction: diagnostic accuracy of low-dose CT protocols in comparison with magnetic resonance imaging. Eur Radiol 2006; 17:475-83. [PMID: 16802125 DOI: 10.1007/s00330-006-0334-y] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2005] [Revised: 04/23/2006] [Accepted: 05/08/2006] [Indexed: 02/06/2023]
Abstract
The purpose was to assess the practicability of low-dose CT imaging of late enhancement in acute infarction. Following temporary occlusion of the second diagonal branch, seven pigs were studied by multislice computed tomography (MSCT) and magnetic resonance imaging (MRI). Thus, 64-slice CT was performed at 3, 5, 10 and 15 min following the injection of contrast medium according to a bolus/low-flow protocol. Standard parameters of 120 kV and 800 mAs were compared with 80 kV and 400 mAs in various combinations. Infarct volumes were assessed as percentage of the ventricle for both MSCT and MR images. CT density values for viable and infarcted myocardium were obtained and image quality assessed. Mean infarct volume as measured by MRI was 12.33+/-7.06%. MSCT achieved best correlation of volumes at 5 and 10 min. Whilst lowering of tube current resulted in poor correlation, tube voltage did not affect accuracy of infarct measurement (r (2)=0.92 or 0.93 at 5 min, 800 mAs and 80 or 120 kV). In terms of image quality, greater image noise with 80 kV was compensated by significantly better contrast enhancement between viable and non-viable myocardium at lower voltage. Myocardial viability can accurately be assessed by MSCT at 80 kV, which ensures higher contrast for late enhancement and yields good correlation with MRI.
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Affiliation(s)
- H Brodoefel
- Department of Diagnostic Radiology, Eberhard-Karls-University, Hoppe-Seyler-Str. 3, 72076 Tübingen, Germany.
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Brodoefel H, Reimann A, Heuschmid M, Küttner A, Beck T, Burgstahler C, Claussen CD, Schroeder S, Kopp AF. Non-invasive coronary angiography with 16-slice spiral computed tomography: image quality in patients with high heart rates. Eur Radiol 2006; 16:1434-41. [PMID: 16498533 DOI: 10.1007/s00330-006-0155-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2005] [Revised: 12/07/2005] [Accepted: 01/06/2006] [Indexed: 11/25/2022]
Abstract
The purpose of this study was to assess segment image quality at high heart rates using 16-slice computed tomography and differential reconstruction for major coronary vessels. According to the following protocol, 16-slice CT coronary angiography in 46 patients with a mean heart rate of 86.3+/-11.8 was reconstructed. At three transverse planes, preview series were obtained and motion artifacts evaluated in 5% increments from 0-95% within the cardiac cycle. Relying on image quality in the previews, reconstructions were performed at three z-positions for each patient. Segment image quality was assessed in terms of artifacts and visibility. The effects of heart rate and trigger delay on image quality were analyzed. Optimal image quality was achieved at 25 to 35% of the cardiac cycle for the left circumflex (CX) and right coronary artery (RCA) or 30 to 40% for the left main (LM) and left anterior descending artery (LAD). Sixteen-slice CT and differential reconstruction produced good image quality with a low percentage of motion-degraded proximal and middle segments (8.8%). Grades were 1.5 for the LM, 1.9 for the LAD, 2.0 for the CX and 2.3 for the RCA. At high heart rates, good image quality of the coronary arteries is achieved by 16-slice CT and a sophisticated reconstruction strategy at peak to late systole.
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Affiliation(s)
- H Brodoefel
- Department of Diagnostic Radiology, Eberhard Karl University, Hoppe-Seyler-Str. 3, 72076, Tübingen, Germany.
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Seitz T, Reimann A, Pfeiffer S, Weyand M, Fischlein T. Sorin Pericarbon More© intraanular and Soprano© supraanular: Superiority of the new supraanular valve design. Thorac Cardiovasc Surg 2006. [DOI: 10.1055/s-2006-925827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ohmer M, Brodoefel H, Reimann A, Heuschmid M, Küttner A, Beck T, Schroeder S, Kopp AF, Claussen CD. 16-Zeilen-CT-Koronarangiographie: Bildqualität bei Patienten mit hoher Herzfrequenz. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-941084] [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: 10/20/2022]
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Luz O, Heuschmid M, Klabunde M, Buchgeister M, Reimann A, Claussen CD, Kopp AF. Vergleich von 16- und 64 Zeilen CT- Colonographie (CTC) hinsichtlich Detektionsgenauigkeit colorektaler Raumforderungen und Strahlenbelastung. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-940909] [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: 10/20/2022]
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Brodoefel H, Scheule AM, Klumpp B, Reimann A, Ohmer M, Fenchel M, Miller S, Claussen CD, Kopp A. Vitalitätsdiagnostik am Schweineherzmodell: Vergleich unterschiedlicher Kontrastprotokolle bezüglich Darstellbarkeit von Late Enhancement und Mikrovaskulärer Obstruktion in der 64-MSCT. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-941080] [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: 10/20/2022]
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Heuschmid M, Klabunde M, Buchgeister M, Reimann A, Ohmer M, Seemann MD, Claussen CD, Kopp AF. Strahlenexposition bei der 64-Zeilen Mehrschicht-Computertomographie des Herzens: Evaluation verschiedener Untersuchungsprotokolle. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-940731] [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: 10/20/2022]
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Burgstahler C, Beck T, Reimann A, Heuschmid M, Kopp A, Schröder S. Nicht-invasive Darstellung des Effektes einer lipidsenkenden Therapie auf die koronare Plaquelast mit der Mehrzeilen-Computer-Tomographie in einem Risikokollektiv. DIABETOL STOFFWECHS 2006. [DOI: 10.1055/s-2006-943975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Burgstahler C, Beck T, Kuettner A, Reimann A, Kopp AF, Heuschmid M, Claussen CD, Schroeder S. Image quality and diagnostic accuracy of 16-slice multidetector computed tomography for the detection of coronary artery disease in obese patients. Int J Obes (Lond) 2005; 30:569-73. [PMID: 16276363 DOI: 10.1038/sj.ijo.0803157] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [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: 11/08/2022]
Abstract
BACKGROUND Cardiac multislice spiral computed tomography (MSCT) scanners permit visualization of the coronary arteries with an overall good sensitivity (sens) and specificity (spec). However, in obese patients (pts), who are at higher risk to develop coronary artery disease (CAD), image quality of MSCT is supposed to be limited. At present, there are no data whether the accuracy of MSCT depends on the body mass index (BMI). Thus, we compared the catheter-controlled MSCT results from normal weight and obese pts in a cohort of 117 pts with regard to sens, spec, positive predictive value (PPV), negative predictive value (NPV) and image quality. METHODS AND MATERIAL In all, 21 normal weight pts (group I: BMI<25, 64.6+/-11.1 years, number of risk factors 2.1+/-1.1), 60 pts with mild overweight (group II: BMI 25-30, 64.6+/-8.9 years, number of risk factors 3.4+/-1.0) and 36 obese pts (group III: BMI >30, 63.0+/-8.5 years, number of risk factors 3.4+/-0.9) were examined by MSCT (Sensation 16 Speed 4 D((R)), Siemens, Germany, gantry rotation time 375 ms) and invasive coronary angiography. MSCT results were compared blinded to the results of the coronary angiography with regard to the presence or absence of a significant stenosis (>50%) in a modified AHA 13 segment (sgt) model. Image quality was assessed on a qualitative scale between 1 (very good) and 5 (insufficient image quality) for each sgt. RESULTS Sens, spec, PPV and NPV were statistically not different in all three groups (I: 0.88/0.97/0.91/0.96, II: 0.83/0.97/0.88/0.95, III: 0.87/0.99/0.96/0.96). 3 pts (group I 1, group II 2) had to be excluded from analysis due to technical problems. Group I had significantly less risk factors (P < 0.001) and image quality was significantly better than in group II and III (P < 0.05). Group II and III did not differ with regard to risk factors or image quality. CONCLUSIONS Overweight and obesity have an impact on MSCT image quality but did not hamper the diagnostic accuracy. Thus, MSCT is a noninvasive method to detect or rule out CAD also in pts with higher BMI. These retrospective data have to be confirmed in larger prospective trials.
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Affiliation(s)
- C Burgstahler
- Department of Internal Medicine, Division of Cardiology, Eberhard-Karls-University Tuebingen, Tuebingen, Germany
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Küttner AK, Beck T, Reimann A, Drosch T, Heuschmid M, Burgstahler C, Schröder S, Kopp AF. Ergebnisse der nichtinvasiven koronaren Stenosedetektion unter Verwendung der 16-Zeilen-MDCT mit 185 ms Zeitauflösung. ROFO-FORTSCHR RONTG 2005. [DOI: 10.1055/s-2005-867425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Cesnjevar R, Hakami L, Reimann A, Koch A, Weyand M. Mid-term survival after continuous postoperative cardiac support in pediatric patients with V-A-ECMO. Thorac Cardiovasc Surg 2005. [DOI: 10.1055/s-2005-862042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Cesnjevar R, Hakami L, Reimann A, Zartner P, Weyand M. Early results of complex mitral-valve-reconstruction in pediatric patients. Thorac Cardiovasc Surg 2005. [DOI: 10.1055/s-2005-862085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Harig F, Feyrer R, Reimann A, Hakami L, Strasser E, Münch F, Vestweber-Wilmes E, Bretzger J, Singer H, Weyand M, Cesnjevar R. Does the additional use of heparin-coated extracorporeal circuits (ECC) optimize the effect of Modified Ultrafiltration (MUF) in pediatric perfusion? Thorac Cardiovasc Surg 2005. [DOI: 10.1055/s-2005-862047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ensminger S, Spriewald B, Tandler R, Reimann A, Kondruweit M, Feyrer R, Weyand M, Fischlein T. Immunomonitoring after human heart transplantation. Thorac Cardiovasc Surg 2005. [DOI: 10.1055/s-2005-861984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Casselmann C, Reimann A, Friedrich I, Schubert A, Silber RE, Simm A. Age-Dependent Expression of Advanced Glycation End Product Receptor Genes in the Human Heart. Gerontology 2004; 50:127-34. [PMID: 15114033 DOI: 10.1159/000076770] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2003] [Accepted: 04/24/2003] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Advanced glycation end products (AGEs) are formed by the reaction of sugars and NH2 groups of lysine and arginine residues and have been shown to accumulate in tissues, including the heart, with normal ageing. The interaction of AGEs with their receptors is known to cause changes in cell function, leading, for example, to the production of pro-inflammatory cytokines and free radicals. OBJECTIVE This study investigated the gene expression of the five known AGE receptors: AGE-R1, AGE-R2, AGE-R3, the scavenger receptor II, and the receptor for AGEs (RAGE) in human heart tissue. METHODS Tissue samples were taken from the right cardiac auricles from three patient groups: children (2.4 +/- 1.1 years), adults (45.3 +/- 0.8 years) and elderly subjects (76.4 +/- 0.4 years). Analysis of gene expression of the five AGE receptors was performed using the reverse transcription-polymerase chain reaction (RT-PCR) and 18S mRNA levels as loading controls. RESULTS Our results show an age-dependent upregulation of the genes for AGE-R3 and the scavenger receptor II, but a downregulation for RAGE and no significant differences for AGE-R1 and AGE-R2. CONCLUSION This study supports a pathophysiological function for AGE receptors such as AGE-R3 and RAGE in the ageing heart.
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Affiliation(s)
- C Casselmann
- Department of Cardiothoracic Surgery, University of Halle-Wittenberg, Halle, Germany
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Simm A, Casselmann C, Schubert A, Hofmann S, Reimann A, Silber RE. Age associated changes of AGE-receptor expression: RAGE upregulation is associated with human heart dysfunction. Exp Gerontol 2004; 39:407-13. [PMID: 15036400 DOI: 10.1016/j.exger.2003.12.006] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2003] [Revised: 12/12/2003] [Accepted: 12/16/2003] [Indexed: 11/28/2022]
Abstract
The binding of advanced glycation endproducts (AGEs) to their receptors is known to cause changes in cell function during normal ageing and is implicated in the pathogenesis of cardiovascular disease. In this study, expression of the AGE-receptor 3 (AGE-R3) and the receptor for AGEs (RAGE) was compared on the mRNA and protein level in the ageing human heart. Western blot and RT-PCR analysis of the AGE receptors from the cardiac auricles in senescent and adult patients was performed and compared with young controls. Whereas the expressions of AGE-R3 as well as RAGE protein were significantly upregulated in the senescent population, only the upregulation of RAGE is associated with reduced heart function. Therefore, our results support a pathophysiological function for RAGE in the ageing human heart.
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Affiliation(s)
- A Simm
- Department of Cardio-Thoracic-Surgery, University of Halle-Wittenberg, Ernst-Grube Str. 40, D-06120 Halle, Germany.
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Abstract
Lignocellulose hydrolysates contain fermentation inhibitors causing decreased ethanol production. The inhibitors include phenolic compounds, furan aldehydes, and aliphatic acids. One of the most efficient methods for removing inhibiting compounds prior to fermentation is treatment of the hydrolysate with ion-exchange resins. The performance and detoxification mechanism of three different resins were examined: an anion exchanger, a cation exchanger, and a resin without charged groups (XAD-8). A dilute acid hydrolysate of spruce was treated with the resins at pH 5.5 and 10.0 prior to ethanolic fermentation with Saccharomyces cerevisiae. In addition to the experiments with hydrolysate, the effect of the resins on selected model compounds, three phenolics (vanillin, guaiacol, and coniferyl aldehyde) and two furan aldehydes (furfural and hydroxymethyl furfural), was determined. The cation exchanger increased ethanol production, but to a lesser extent than XAD-8, which in turn was less effective than the anion exchanger. Treatment at pH 10.0 was more effective than at pH 5.5. At pH 10.0, the anion exchanger efficiently removed both anionic and uncharged inhibitors, the latter by hydrophobic interactions. The importance of hydrophobic interactions was further indicated by a substantial decrease in the concentration of model compounds, such as guaiacol and furfural, after treatment with XAD-8.
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Affiliation(s)
- N O Nilvebrant
- STFI, Swedish Pulp and Paper Research Institute, Stockholm
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Nilvebrant NO, Reimann A, de Sousa F, Larsson S, Cassland P, Hong F, Jönsson L. Enzymatic degradation of oxalic acid for prevention of scaling. Progress in Biotechnology 2002. [DOI: 10.1016/s0921-0423(02)80025-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Larsson S, Quintana-Sáinz A, Reimann A, Nilvebrant NO, Jönsson LJ. Influence of lignocellulose-derived aromatic compounds on oxygen-limited growth and ethanolic fermentation by Saccharomyces cerevisiae. Appl Biochem Biotechnol 2000; 84-86:617-32. [PMID: 10849822 DOI: 10.1385/abab:84-86:1-9:617] [Citation(s) in RCA: 129] [Impact Index Per Article: 5.4] [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: 11/11/2022]
Abstract
Phenolic compounds released and generated during hydrolysis inhibit fermentation of lignocellulose hydrolysates to ethanol by Saccharomyces cerevisiae. A wide variety of aromatic compounds form from lignin, which is partially degraded during acid hydrolysis of the lignocellulosic raw material. Aromatic compounds may also form as a result of sugar degradation and are present in wood as extractives. The influence of hydroxy-methoxy-benzaldehydes, diphenols/quinones, and phenylpropane derivatives on S. cerevisiae cell growth and ethanol formation was assayed using a defined medium and oxygen-limited conditions. The inhibition effected by the hydroxy-methoxy-benzaldehydes was highly dependent on the positions of the substituents. A major difference in inhibition by the oxidized and reduced form of a diphenol/quinone was observed, the oxidized form being the more inhibitory. The phenylpropane derivatives were examined with respect to difference in toxicity depending on the oxidation-reduction state of the gamma-carbon, the presence and position of unsaturated bonds in the aliphatic side chain, and the number and identity of hydroxyl and methoxyl substituents. Transformations of aromatic compounds occurring during the fermentation included aldehyde reduction, quinone reduction, and double bond saturation. Aromatic alcohols were detected as products of reductions of the corresponding aldehydes, namely hydroxy-methoxy-benzaldehydes and coniferyl aldehyde. High molecular mass compounds and the corresponding diphenol were detected as products of quinone reduction. Together with coniferyl alcohol, dihydroconiferyl alcohol was identified as a major transformation product of coniferyl aldehyde.
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Affiliation(s)
- S Larsson
- Department of Applied Microbiology, Lund University/Lund Institute of Technology, Sweden
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Schmid C, Wilhelm M, Reimann A, Rötker J, Deiwick M, Loick M, Kerber S, Hammel D, Weyand M, Scheld HH. Use of an intraaortic balloon pump in patients with impaired left ventricular function. SCAND CARDIOVASC J 1999; 33:194-8. [PMID: 10517205 DOI: 10.1080/14017439950141614] [Citation(s) in RCA: 9] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Prophylactic use of an intraaortic balloon pump (IABP) prior to open-heart surgery in patients with impaired left ventricular function is still under debate. Patients with left ventricular ejection fraction (LVEF) < 40% were therefore compared according to time of IABP placement, viz. preoperative (n = 56), intraoperative (n = 40) or postoperative (n = 17), and also with patients who did not receive mechanical support despite LVEF < 40% (n = 78). The main indication for preoperative IABP insertion was severely impaired left ventricular function (80%), while patients with intraoperative or postoperative IABP placement mainly presented with low cardiac-output syndrome (70%/53%). Preoperative IABP was associated with a low mortality rate (8.9%), whereas patients with intraoperative or postoperative IABP placement had a high mortality risk and an increased catecholamine requirement. Of the patients scheduled for surgery without prophylactic IABP, 19% required intra- or postoperative insertion. Prophylactic placement of IABP thus reduced the mortality rate as well as the postoperative need for mechanical and catecholamine support. Need for intraoperative IABP insertion was associated with high mortality, whereas the outcome after postoperative IABP placement depended on the indication for the measure.
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Affiliation(s)
- C Schmid
- Department of Cardiothoracic Surgery, Westfälische Wilhelms University, Muenster, Germany.
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Polidori MC, Mecocci P, Reimann A, Cherubini A, Cecchetti R, Briviba K, Stahl W, Sies H, Senin U. Plasma lipid peroxidation and vitamin C status in healthy centenarians. J Am Geriatr Soc 1999; 47:1038-9. [PMID: 10443874 DOI: 10.1111/j.1532-5415.1999.tb01308.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Reimann A, Biebl H, Deckwer WD. Production of 1,3-propanediol by Clostridium butyricum in continuous culture with cell recycling. Appl Microbiol Biotechnol 1998. [DOI: 10.1007/s002530051182] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Guerassimov A, Duffy C, Zhang Y, Banerjee S, Leroux JY, Reimann A, Webber C, Delaunay N, Vipparti V, Ronbeck L, Cartman A, Arsenault L, Rosenberg LC, Poole AR. Immunity to cartilage link protein in patients with juvenile rheumatoid arthritis. J Rheumatol 1997; 24:959-64. [PMID: 9150089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE To determine whether children with juvenile rheumatoid arthritis (JRA) express cellular immunity to cartilage link protein. METHODS Link protein was purified from human fetal epiphyseal and bovine adult nasal cartilage. It was used in proliferation assays with the peripheral blood lymphocytes isolated from 54 children with JRA and 22 nonarthritic controls. RESULTS Patients with JRA expressed a significantly higher prevalence of cellular proliferation to human link protein compared with the control group, independent of whether they had pauciarticular, polyarticular, or systemic disease. In the case of bovine link protein, significant differences were only noted for the polyarticular group. There was significant correlation between the immunity to bovine and to human link proteins. Furthermore, immune responses to both molecules correlated with measures of joint disease activity. CONCLUSION These results suggest that immunity to link protein may play a role in the pathogenesis of JRA.
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Affiliation(s)
- A Guerassimov
- Joint Diseases Laboratory, Shriners Hospital for Crippled Children, McGill University, Montreal, Canada
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Freitag A, Reimann A, Wessler I, Racké K. Effects of bacterial lipopolysaccharides (LPS) and tumour necrosis factor-alpha (TNF alpha) on rat tracheal epithelial cells in culture: morphology, proliferation and induction of nitric oxide (NO) synthase. Pulm Pharmacol 1996; 9:149-56. [PMID: 8948511 DOI: 10.1006/pulp.1996.0017] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Rat tracheal epithelial cells were cultured and the effects of LPS and TNF alpha on cell morphology, rate of proliferation and NO synthase activity were studied. NO synthase activity was determined by measuring the accumulation of 3H-L-citrulline during incubation of confluent monolayer with 3H-L-arginine. In untreated cells no significant 3H-L-citrulline formation was detected, and bradykinin and the calcium ionophore A 23187 failed to stimulate 3H-L-citrulline formation excluding a constitutively expressed, calcium-dependent NO synthase activity. After culturing the cells for 18 h in the presence of LPS (10 micrograms/ml) and TNF alpha (500 U/ml) a marked formation of 3H-L-citrulline could be detected, which was largely inhibited by N(G)-monomethyl-L-arginine (L-NMMA) indicating the induction of NO synthase activity which could be prevented by dexamethasone. Exposure of confluent monolayer to LPS and TNF alpha for up to 4 days resulted in a reduction in cell density by 20% within 1 to 2 days and in additional marked changes in cell morphology. The normal honeycomb-like structure of the culture was lost and a considerable number of cells developed "dendritic' outgrowths. These morphological changes as well as the reduction in cell density was attenuated by dexamethasone, but not by the NO synthase inhibitor L-NMMA. The rate of cell proliferation was determined in non-confluent cultures 24 h after passage by determination of the incorporation of tritium into DNA during 24 h of incubation with 3H-thymidine. 3H-thymidine incorporation was reduced by about 40-45% when LPS or TNF alpha was present during exposure to 3H-thymidine, and by about 65%, when LPS and TNF alpha were present in combination. Neither L-NMMA nor dexamethasone significantly affected the 3H-thymidine incorporation nor the inhibitory effects of LPS and TNF alpha. In conclusion, airway epithelial cells are markedly affected by LPS and TNF alpha and the various responses (changes in the cell morphology, inhibition of cell proliferation and induction of NO synthase activity) appear to be caused by different (dexamethasone-sensitive and -insensitive), cellular mechanisms. An enhanced formation of endogenous NO may not be responsible for the observed morphological changes or the inhibition of cell proliferation.
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Affiliation(s)
- A Freitag
- Institute of Pharmacology and Toxicology, University of Bonn, Germany
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Abstract
Large amounts of 5-HT are present in the mammalian intestine where the amine is concentrated in the enterochromaffin cells (ECs) of the mucosa. ECs have the enzymes to synthesize 5-HT, are endowed with a specific, imipramine-sensitive 5-HT uptake mechanism and can store 5-HT in specific secretory vesicles. ECs can secrete 5-HT in a calcium-dependent manner. In particular, calcium influx through voltage-regulated channels and receptor-mediated liberation of intracellular calcium can evoke 5-HT release. 5-HT secretion from ECs occurs predominantly at the interstitial side and is controlled by a complex pattern of receptor-mediated mechanisms. Stimulatory receptors (beta-adrenoceptors, muscarine, nicotine and 5-HT3 receptors) and inhibitory receptors (alpha 2-adrenoceptors, histamine H3, GABAA- and GABAB-, A2 and P2y alpha purine and 5-HT4 receptors as well as receptors for vasoactive intestinal polypeptide (VIP), pituitary adenylate cyclase stimulating peptide (PACAP) and somatostatin) have been shown to be involved in the control of 5-HT release from the ECs.
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Affiliation(s)
- K Racké
- Department of Pharmacology, J.W. Goethe-University, Frankfurt, Germany
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47
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Racké K, Berrino L, Möhlig A, Jäger R, Griepenkerl I, Bräutigam M, Reimann A. Modulation of noradrenaline release in rat isolated stomach by prostanoids, but not by histaminergic mechanisms. Naunyn Schmiedebergs Arch Pharmacol 1995; 352:631-9. [PMID: 9053735 DOI: 10.1007/bf00171322] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Several gastric functions are modulated by the sympathetic nervous system, but local mechanisms involved in the control of noradrenaline release are largely unknown. Overflow of endogenous noradrenaline was studied from isolated rat stomach incubated in Ussing chambers allowing the separate determination of mucosal and serosal overflow. Spontaneous noradrenaline overflow was similar at the mucosal and serosal side, but electrical field stimulation caused a frequency-dependent increase in noradrenaline overflow selectively at the serosal side. Evoked noradrenaline overflow was blocked by tetrodotoxin, not affected by indometacin and markedly enhanced (by about 250%) by yohimbine. In the presence of indometacin and yohimbine, sulprostone (an agonist at EP1/EP3 receptors) and misoprostol (an agonist at EP2/EP3 receptors) reduced the noradrenaline overflow evoked by stimulation at 3 Hz maximally by about 80% (EC50: 6 nmol/l and 11 nmol/l, respectively). The EP1 receptor selective antagonist AH 6809 (6-isopropoxy-9-oxoxanthene-2-carboxylic acid) did not antagonize the inhibition by sulprostone. Noradrenaline overflow evoked by stimulation at 1 Hz and 3 Hz was increased by scopolamine by about 50% and almost completely inhibited by oxotremorine. Neither, histamine nor the H3 receptor selective agonist (R)-alpha-methyl-histamine, nor the H1, H2 and H3 selective receptor antagonists mepyramine, cimetidine and thioperamide significantly affected noradrenaline overflow evoked by stimulation at 1 Hz or 3 Hz. In conclusion, impulse-induced noradrenaline release in the rat stomach is controlled by multiple presynaptic mechanisms involving alpha 2-adrenergic autoreceptors, EP3 prostanoid and muscarine heteroreceptors, whereas histaminergic mechanisms do not appear to be significant.
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Affiliation(s)
- K Racké
- Department of Pharmacology, University of Frankfurt, Germany
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48
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Schwörer H, Reimann A, Ramadori G, Racké K. Characterization of histamine H3 receptors inhibiting 5-HT release from porcine enterochromaffin cells: further evidence for H3 receptor heterogeneity. Naunyn Schmiedebergs Arch Pharmacol 1994; 350:375-9. [PMID: 7531293 DOI: 10.1007/bf00178954] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The nature of the histamine receptor mediating inhibition of 5-HT release was investigated in strips of the porcine small intestine by investigating the effects of histamine ligands on the overflow of endogenous 5-HT and its metabolite 5-hydroxyindoleacetic acid (5-HIAA). The overflow was measured by HPLC, combined with electrochemical detection and represents calcium-sensitive 5-HT release from enterochromaffin cells, as reported previously. The histamine H3 receptor selective agonists (R)-alpha-methyl-histamine and imetit inhibited the overflow of 5-HT maximally by 50-60%, with EC50 values of 48 and 3.2 nmol/l, respectively. Effects on 5-HT overflow were always accompanied by similar effects on the overflow of 5-HIAA. Thioperamide (100 nmol/l) shifted the concentration response curve of (R)-alpha-methyl-histamine to the right (pKB value 8.38). The inhibitory effect of 1 mumol/l (R)-alpha-methyl-histamine was antagonized in a concentration-dependent manner by thioperamide (IC50: 65 nmol/l) and dimaprit (IC50: 8.6 mumol/l); however, the effect of (R)-alpha-methyl-histamine was weakly antagonized by burimamide (by 38% at 100 mumol/l) and not significantly affected by other H3 receptor antagonists, such as impromidine, betahistine and phenyl-butanoyl-histamine (each up to 100 mumol/l). In conclusion, H3 receptors mediating inhibition of 5-HT release from porcine enterochromaffin cells have a particular pharmacological profile indicating that heterogeneity of H3 receptors may exist. The data suggest that histamine H3 receptors modulating 5-HT release in pig small intestine do not belong to either H3A or H3B receptors as defined in rat tissue.
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Affiliation(s)
- H Schwörer
- Department of Medicine, University of Göttingen, Germany
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49
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Kratje RB, Reimann A, Hammer J, Wagner R. Cultivation of recombinant baby hamster kidney cells in a fluidized bed bioreactor system with porous borosilicate glass. Biotechnol Prog 1994; 10:410-20. [PMID: 7765095 DOI: 10.1021/bp00028a011] [Citation(s) in RCA: 9] [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: 01/27/2023]
Abstract
Dense cell cultivation of the recombinant cell line BHK 21 pSVIL2 was performed in a fluidized bed bioreactor system containing porous borosilicate glass carriers. Experiments were carried out with different medium formulations for a period of 48 days. Due to an effective immobilization of the cells in the reactor, continuous operation was easy to perform. Maximal cell densities and product yields could be maintained, even when protein-free medium was perfused exceeding 2 reactor volumes per day. Final cell densities of magnitude 7.1 x 10(7) mL-1 intrasphere volume were reached, while the interleukin-2 production rate was 0.70 mg day-1. The cell specific productivity reached a value of 1.3 x 10(-10) mg day-1. The first results were presented with a cell line that grows under glutamine-free medium conditions. The use of a glutamine-free medium for the cultivation of the cells resulted in a drastic decrease in cell metabolism. Furthermore, the amino acids lysine and histidine were produced and secreted into the culture supernatant, although these metabolites normally are considered to be essential for animal cells grown in vitro. However, no lethal effect on the cells has been detected, and the total number of cells in the reactor remained constant. The metabolism of threonine has been detected to be directly dependent on the presence of glutamine. Cells grown in glutamine-free culture medium produced glycine yields 6 times higher than those grown in glutamine-containing medium. A bead-to-bead transfer of the cells has also been detected when the cells immobilized within the intrasphere volume of the borosilicate carriers reached the stationary phase.
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Affiliation(s)
- R B Kratje
- Gesellschaft für Biotechnologische Forschung, Abteilung Zellkulturtechnik, Braunschweig, Germany
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50
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Reimann A, Röhm KH, Kadenbach B. Ferricytochrome c induces monophasic kinetics of ferrocytochrome c oxidation in cytochrome c oxidase. J Bioenerg Biomembr 1993; 25:393-9. [PMID: 8226721 DOI: 10.1007/bf00762465] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The kinetics of ferrocytochrome c oxidation by reconstituted cytochrome c oxidase (COX) from bovine heart was followed by a spectrophotometric method, using on-line data collection and subsequent calculation of reaction rates from a function fitted to the progress curve. When reaction rates were calculated at increasing reaction times, the multiphasic kinetics of ferrocytochrome c oxidation gradually changed into monophasic Michaelis-Menten kinetics. The same phenomenon was observed when ferrocytochrome c oxidation was followed in the presence of increasing amounts of ferricytochrome c. From these results we conclude that ferricytochrome c shifts the multiphasic kinetics of ferrocytochrome c oxidation by COX into monophasic kinetics, comparable to high ionic strength conditions. Furthermore, we show that ferricytochrome c inhibits the "high affinity phase" of ferrocytochrome c oxidation in an apparently competitive way, while inhibition of the "low affinity phase" is noncompetitive. These findings are consistent with a "regulatory site model" where both the catalytic and the regulatory site bind ferro- as well as ferricytochrome c.
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Affiliation(s)
- A Reimann
- Fachbereich Chemie (Biochemie), Philipps-Universität, Marburg, Germany
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