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Gottschalk I, Walter A, Menzel T, Weber EC, Wendt S, Sreeram N, Gembruch U, Berg C, Abel JS. D-Transposition of the great arteries with restrictive foramen ovale in the fetus: the dilemma of predicting the need for postnatal urgent balloon atrial septostomy. Arch Gynecol Obstet 2024; 309:1353-1367. [PMID: 36971845 PMCID: PMC10894161 DOI: 10.1007/s00404-023-06997-8] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 03/01/2023] [Indexed: 03/29/2023]
Abstract
OBJECTIVE Restrictive foramen ovale (FO) in dextro-transposition of the great arteries (d-TGA) with intact ventricular septum may lead to severe life-threatening hypoxia within the first hours of life, making urgent balloon atrial septostomy (BAS) inevitable. Reliable prenatal prediction of restrictive FO is crucial in these cases. However, current prenatal echocardiographic markers show low predictive value, and prenatal prediction often fails with fatal consequences for a subset of newborns. In this study, we described our experience and aimed to identify reliable predictive markers for BAS. METHODS We included 45 fetuses with isolated d-TGA that were diagnosed and delivered between 2010 and 2022 in two large German tertiary referral centers. Inclusion criteria were the availability of former prenatal ultrasound reports, of stored echocardiographic videos and still images, which had to be obtained within the last 14 days prior to delivery and that were of sufficient quality for retrospective re-analysis. Cardiac parameters were retrospectively assessed and their predictive value was evaluated. RESULTS Among the 45 included fetuses with d-TGA, 22 neonates had restrictive FO postnatally and required urgent BAS within the first 24 h of life. In contrast, 23 neonates had normal FO anatomy, but 4 of them unexpectedly showed inadequate interatrial mixing despite their normal FO anatomy, rapidly developed hypoxia and also required urgent BAS ('bad mixer'). Overall, 26 (58%) neonates required urgent BAS, whereas 19 (42%) achieved good O2 saturation and did not undergo urgent BAS. In the former prenatal ultrasound reports, restrictive FO with subsequent urgent BAS was correctly predicted in 11 of 22 cases (50% sensitivity), whereas a normal FO anatomy was correctly predicted in 19 of 23 cases (83% specificity). After current re-analysis of the stored videos and images, we identified three highly significant markers for restrictive FO: a FO diameter < 7 mm (p < 0.01), a fixed (p = 0.035) and a hypermobile (p = 0.014) FO flap. The maximum systolic flow velocities in the pulmonary veins were also significantly increased in restrictive FO (p = 0.021), but no cut-off value to reliably predict restrictive FO could be identified. If the above markers are applied, all 22 cases with restrictive FO and all 23 cases with normal FO anatomy could correctly be predicted (100% positive predictive value). Correct prediction of urgent BAS also succeeded in all 22 cases with restrictive FO (100% PPV), but naturally failed in 4 of the 23 cases with correctly predicted normal FO ('bad mixer') (82.6% negative predictive value). CONCLUSION Precise assessment of FO size and FO flap motility allows a reliable prenatal prediction of both restrictive and normal FO anatomy postnatally. Prediction of likelihood of urgent BAS also succeeds reliably in all fetuses with restrictive FO, but identification of the small subset of fetuses that also requires urgent BAS despite their normal FO anatomy fails, because the ability of sufficient postnatal interatrial mixing cannot be predicted prenatally. Therefore, all fetuses with prenatally diagnosed d-TGA should always be delivered in a tertiary center with cardiac catheter stand-by, allowing BAS within the first 24 h after birth, regardless of their predicted FO anatomy.
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Affiliation(s)
- I Gottschalk
- Division of Prenatal Medicine, Gynecological Ultrasound and Fetal Surgery, Department of Obstetrics and Gynecology, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany.
| | - A Walter
- Department of Obstetrics and Prenatal Medicine, University of Bonn, Bonn, Germany
| | - T Menzel
- Division of Prenatal Medicine, Gynecological Ultrasound and Fetal Surgery, Department of Obstetrics and Gynecology, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany
| | - E C Weber
- Division of Prenatal Medicine, Gynecological Ultrasound and Fetal Surgery, Department of Obstetrics and Gynecology, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany
| | - S Wendt
- Heartcenter, Department of Cardiac Surgery, Cardiothoracic Intensive Care and Thoracic Surgery, University Hospital Cologne, University of Cologne, Cologne, Germany
| | - N Sreeram
- Department of Pediatric Cardiology, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany
| | - U Gembruch
- Department of Obstetrics and Prenatal Medicine, University of Bonn, Bonn, Germany
| | - C Berg
- Division of Prenatal Medicine, Gynecological Ultrasound and Fetal Surgery, Department of Obstetrics and Gynecology, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany
| | - J S Abel
- Division of Prenatal Medicine, Gynecological Ultrasound and Fetal Surgery, Department of Obstetrics and Gynecology, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany
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Gottschalk I, Berg C, Menzel T, Abel JS, Kribs A, Dübbers M, Kohaut J, Weber LT, Taylan C, Habbig S, Liebau MC, Boemers TM, Weber EC. Single-center outcome analysis of 46 fetuses with megacystis after intrauterine vesico-amniotic shunting with the Somatex®intrauterine shunt. Arch Gynecol Obstet 2024; 309:145-158. [PMID: 36604332 PMCID: PMC10770195 DOI: 10.1007/s00404-022-06905-6] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 12/20/2022] [Indexed: 01/06/2023]
Abstract
OBJECTIVES To assess the spectrum of underlying pathologies, the intrauterine course and postnatal outcome of 46 fetuses with megacystis that underwent intrauterine vesico-amniotic shunting (VAS) with the Somatex® shunt in a single center. METHODS Retrospective analysis of 46 fetuses with megacystis that underwent VAS either up to 14 + 0 weeks (early VAS), between 14 + 1 and 17 + 0 weeks (intermediate VAS) or after 17 + 0 weeks of gestation (late VAS) in a single tertiary referral center. Intrauterine course, underlying pathology and postnatal outcome were assessed and correlated with the underlying pathology and gestational age at first VAS. RESULTS 46 fetuses underwent VAS, 41 (89%) were male and 5 (11%) were female. 28 (61%) fetuses had isolated and 18 (39%) had complex megacystis with either aneuploidy (n = 1), anorectal malformations (n = 6), cloacal malformations (n = 3), congenital anomalies overlapping with VACTER association (n = 6) or Megacystis-Microcolon Intestinal-Hypoperistalsis Syndrome (MMIHS) (n = 2). The sonographic 'keyhole sign' significantly predicted isolated megacystis (p < 0.001). 7 pregnancies were terminated, 4 babies died in the neonatal period, 1 baby died at the age of 2.5 months and 34 (74%) infants survived until last follow-up. After exclusion of the terminated pregnancies, intention-to-treat survival rate was 87%. Mean follow-up period was 24 months (range 1-72). The underlying pathology was highly variable and included posterior urethral valve (46%), hypoplastic or atretic urethra (35%), MMIHS or prune belly syndrome (10%) and primary vesico-ureteral reflux (2%). In 7% no pathology could be detected postnatally. No sonographic marker was identified to predict the underlying pathology prenatally. 14 fetuses underwent early, 24 intermediate and 8 late VAS. In the early VAS subgroup, amnion infusion prior to VAS was significantly less often necessary (7%), shunt complications were significantly less common (29%) and immediate kidney replacement therapy postnatally became less often necessary (0%). In contrast, preterm delivery ≤ 32 + 0 weeks was more common (30%) and survival rate was lower (70%) after early VAS compared to intermediate or late VAS. Overall, 90% of liveborn babies had sufficient kidney function without need for kidney replacement therapy until last follow-up, and 95% had sufficient pulmonary function without need for mechanical respiratory support. 18% of babies with complex megacystis suffered from additional health restrictions due to their major concomitant malformations. CONCLUSIONS Our data suggest that VAS is feasible from the first trimester onward. Early intervention has the potential to preserve neonatal kidney function in the majority of cases and enables neonatal survival in up to 87% of cases. Despite successful fetal intervention, parents should be aware of the potential of mid- or long-term kidney failure and of additional health impairments due to concomitant extra-renal anomalies that cannot be excluded at time of intervention.
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Affiliation(s)
- I Gottschalk
- Division of Prenatal Medicine, Fetal Surgery and Gynecological Ultrasound, Department of Obstetrics and Gynecology, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany.
| | - C Berg
- Division of Prenatal Medicine, Fetal Surgery and Gynecological Ultrasound, Department of Obstetrics and Gynecology, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany
| | - T Menzel
- Division of Prenatal Medicine, Fetal Surgery and Gynecological Ultrasound, Department of Obstetrics and Gynecology, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany
| | - J S Abel
- Division of Prenatal Medicine, Fetal Surgery and Gynecological Ultrasound, Department of Obstetrics and Gynecology, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany
| | - A Kribs
- Department of Neonatology, University Hospital of Cologne, Cologne, Germany
| | - M Dübbers
- Division of Pediatric Surgery, University Hospital of Cologne, Cologne, Germany
| | - J Kohaut
- Division of Pediatric Surgery, University Hospital of Cologne, Cologne, Germany
| | - L T Weber
- Department of Pediatrics, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany
| | - C Taylan
- Department of Pediatrics, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany
| | - S Habbig
- Department of Pediatrics, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany
| | - M C Liebau
- Department of Pediatrics, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany
| | - T M Boemers
- Department of Pediatric Surgery and Urology, Children´S Academic Hospital Amsterdamer Cologne, Cologne, Germany
| | - E C Weber
- Division of Prenatal Medicine, Fetal Surgery and Gynecological Ultrasound, Department of Obstetrics and Gynecology, University Hospital Cologne and Faculty of Medicine, University of Cologne, Cologne, Germany
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Menzel T, Teubner T, Adam MT, Toreini P. Home is where your Gaze is – Evaluating effects of embedding regional cues in user interfaces. Computers in Human Behavior 2022. [DOI: 10.1016/j.chb.2022.107369] [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: 11/03/2022]
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Longis M, Menzel T, Neubauer P, Junne S. Novel gradient‐based monitoring for enhanced hydrolysis in plug‐flow‐based dark fermentation. CHEM-ING-TECH 2022. [DOI: 10.1002/cite.202255194] [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: 11/12/2022]
Affiliation(s)
- M. Longis
- Technische Universität Berlin Institute of Biotechnology, Chair of Bioprocess Engineering Ackerstr. 76 13355 Berlin Germany
| | - T. Menzel
- Technische Universität Berlin Institute of Biotechnology, Chair of Bioprocess Engineering Ackerstr. 76 13355 Berlin Germany
| | - P. Neubauer
- Technische Universität Berlin Institute of Biotechnology, Chair of Bioprocess Engineering Ackerstr. 76 13355 Berlin Germany
| | - S. Junne
- Technische Universität Berlin Institute of Biotechnology, Chair of Bioprocess Engineering Ackerstr. 76 13355 Berlin Germany
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Menzel T, Potthast W. Validation of a Novel Boxing Monitoring System to Detect and Analyse the Centre of Pressure Movement on the Boxer's Fist. Sensors (Basel) 2021; 21:s21248394. [PMID: 34960487 PMCID: PMC8703349 DOI: 10.3390/s21248394] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 12/13/2021] [Accepted: 12/14/2021] [Indexed: 11/16/2022]
Abstract
The examination of force distribution and centre of pressure (CoP) displacement is a common method to analyse motion, load, and load distribution in biomechanical research. In contrast to gait analysis, the force progression in boxing punches is a new field of investigation. The centre of pressure displacement and distribution of forces on the surface of the fist during a boxing punch is of great interest and crucial to understanding the effect of the punch on the biological structures of the hand as well as the technical biomechanical aspects of the punching action. This paper presents a new method to display the CoP progression on the boxer’s fist Therefore, this study presents the validation of the developed novel boxing monitoring system in terms of CoP displacement. In addition, the CoP progression of different punching techniques in boxing is analysed on the athlete’s fist. The accuracy of the examination method of the CoP course was validated against the gold standard of a Kistler force plate. High correlations were detected between the developed sensor system and the force plate CoP with a Pearson correlation coefficient ranging from 0.93 to 0.97. The information obtained throughout the experimental study is of great importance in order to gain further knowledge into the technical execution of boxing punches as well as to provide a novel measuring method for determining CoP on the surface of the fist, to improve the understanding of the etiology of boxing-related hand injuries.
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Affiliation(s)
- Tobias Menzel
- Institute of Biomechanics and Orthopaedics, German Sport University Cologne, 50933 Cologne, Germany
| | - Wolfgang Potthast
- Institute of Biomechanics and Orthopaedics, German Sport University Cologne, 50933 Cologne, Germany
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Menzel T, Potthast W. Application of a Validated Innovative Smart Wearable for Performance Analysis by Experienced and Non-Experienced Athletes in Boxing. Sensors (Basel) 2021; 21:s21237882. [PMID: 34883881 PMCID: PMC8659887 DOI: 10.3390/s21237882] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/21/2021] [Accepted: 11/24/2021] [Indexed: 11/16/2022]
Abstract
An athlete's sporting performance depends to a large extent on the technical execution of the athletic motion in order to achieve maximum effectiveness in physical performance. Performance analysis provides an important means of classifying and quantifying athletic prowess in terms of the significant performance aspects of the sport to provide objective feedback. This study aimed to analyze technical execution in terms of punch trajectory, force, velocity and time, considering the expert-novice paradigm by investigating the technical execution of 31 experienced and non-experienced athletes for the four main punching techniques of the cross, jab, uppercut and hook strike. The kinetic and kinematic data were collected by means of a boxing monitoring system developed and validated for in-field use. The research revealed significant correlation for executed punching trajectory and punch force in intragroup comparison and significant differences in intergroup comparison. No significant differences were detected for punch velocity in either inter- or intra-group paradigms. This study, through use of the sensor system, aligns with the results of existing publications conducted in laboratory conditions, in the assessment of punch force, punch speed and punch time and thus extends the state of research by use of a smart wearable in field method.
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Abstract
AbstractThere is growing international evidence that lesbian, gay, bisexual, transgender, queer, and sexually/gender diverse (LGBTQ+) people regularly experience discrimination in sports. However, there is a lack of empirical research with regard to the sports situation in Germany. Based on a quantitative survey of 858 self-identifying LGBTQ+ individuals, the present research is the first to provide a comprehensive picture of the experiences of LGBTQ+ people in sports in Germany. To add distinctive knowledge to the international research, this analysis considers differences within the group of LGBTQ+ people and between various sports settings (i.e., organizational framework, team vs individual sports, and performance level. Two research questions are addressed: (1) What micro- and meso-level factors affect the witnessing of homo-/transnegative language and the prevalence of homo-/transnegative incidents in respondents’ sports activities? (2) What micro- and meso-level factors affect respondents’ feelings of being offended by homo-/transnegative language and what behavioral consequences (i.e., refraining from specific sports and reactions to homo-/transnegative episodes) can be observed among different LGBTQ+ subgroups? The data reveal the impact of the sports context on the perception of homo-/transnegative language but not on negative experiences. Moreover, there is a higher prevalence of gay compared to lesbian athletes with regard to the perception of homo-/transnegative language in their sports and a higher prevalence of gay athletes and non-cisgender (transgender) athletes with regard to homo-/transnegative experiences in sport compared to lesbian and cisgender athletes. The empirical evidence confirms and deepens international findings. Moreover, the data assist the Sport Ministers Conference’s goal of increasing initiatives to tackle the exclusion and discrimination faced by LGBTQ+ people in sports.
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Braumüller B, Menzel T, Hartmann-Tews I. Gender Identities in Organized Sports-Athletes' Experiences and Organizational Strategies of Inclusion. Front Sociol 2020; 5:578213. [PMID: 33869505 PMCID: PMC8022765 DOI: 10.3389/fsoc.2020.578213] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 09/22/2020] [Indexed: 06/12/2023]
Abstract
In relation to conceptualizing sports, beliefs about sex binary and male hegemony are dominant. To match these assumptions and provide level playing fields, sport systems are based on sex-segregation. Thus, people who do not fit into or reject fitting into sex categories are hindered from participating in sports, particularly organized sports. Studies on social exclusion of gender-identity minorities in sports mainly adopt a qualitative approach and focus on Anglophone countries. This research is the first to provide a comprehensive picture of the experiences of LGBT+ athletes in organized sports settings in Europe and is based on a quantitative online survey (n = 2,282). The current paper draws special attention to differences between cisgender and non-cisgender athletes (including transgender men, transgender women, non-binary, and non-identifying individuals). Besides athletes' experiences, organizational strategies of inclusion, derived from qualitative interviews with stakeholders from sport systems in five European countries (Germany, Scotland, Austria, Italy, and Hungary) are examined. Theoretically anchored in Cunningham's (2012) multilevel model for understanding the experiences of LGBT+ individuals and Meyer's (2003) minority stress model, the paper aims to (1) analyze the assessment of transnegativity and (2) examine negative experiences (prevalence, forms, perpetrators) of LGBT+ athletes from organized sport contexts in Europe; and (3) discuss inclusive strategies in sports organizations in Europe. Data reveal that transnegativity is perceived as a major problem in European sports, and non-cisgender athletes are the most vulnerable group, suffering particularly from structural discrimination. The implementation of inclusive strategies for non-cisgender athletes is perceived as a complex and essential task, but the sports organizations in the five countries differ substantially in terms of the status of implementation.
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Affiliation(s)
- Birgit Braumüller
- Institute of Sociology and Gender Studies, German Sport University Cologne, Cologne, Germany
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Gottschalk I, Abel JS, Menzel T, Herberg U, Breuer J, Gembruch U, Geipel A, Brockmeier K, Berg C. Prenatal diagnosis and postnatal outcome of fetuses with double outlet right ventricle (DORV) in a single center. Geburtshilfe Frauenheilkd 2018. [DOI: 10.1055/s-0038-1671112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Affiliation(s)
- I Gottschalk
- Universitätsfrauenklinik Köln, Bereich für Pränatalmedizin und Gynäkologische Sonografie, Köln, Deutschland
| | - JS Abel
- Universitätsfrauenklinik Köln, Bereich für Pränatalmedizin und Gynäkologische Sonografie, Köln, Deutschland
| | - T Menzel
- Universitätsfrauenklinik Köln, Bereich für Pränatalmedizin und Gynäkologische Sonografie, Köln, Deutschland
| | - U Herberg
- Universitätsklinikum Bonn, Abteilung für Kinderkardiologie, Bonn, Deutschland
| | - J Breuer
- Universitätsklinikum Bonn, Abteilung für Kinderkardiologie, Bonn, Deutschland
| | - U Gembruch
- Universitätsklinikum Bonn, Abteilung für Geburtshilfe und Pränatalmedizin, Bonn, Deutschland
| | - A Geipel
- Universitätsklinikum Bonn, Abteilung für Geburtshilfe und Pränatalmedizin, Bonn, Deutschland
| | - K Brockmeier
- Universitätsklinik Köln, Klinik und Poliklinik für Kinderkardiologie, Köln, Deutschland
| | - C Berg
- Universitätsfrauenklinik Köln, Bereich für Pränatalmedizin und Gynäkologische Sonografie, Köln, Deutschland
- Universitätsklinikum Bonn, Abteilung für Geburtshilfe und Pränatalmedizin, Bonn, Deutschland
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Klein DK, Hoffmann S, Ahlskog JK, O'Hanlon K, Quaas M, Larsen BD, Rolland B, Rösner HI, Walter D, Kousholt AN, Menzel T, Lees M, Johansen JV, Rappsilber J, Engeland K, Sørensen CS. Cyclin F suppresses B-Myb activity to promote cell cycle checkpoint control. Nat Commun 2015; 6:5800. [PMID: 25557911 DOI: 10.1038/ncomms6800] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 11/07/2014] [Indexed: 01/31/2023] Open
Abstract
Cells respond to DNA damage by activating cell cycle checkpoints to delay proliferation and facilitate DNA repair. Here, to uncover new checkpoint regulators, we perform RNA interference screening targeting genes involved in ubiquitylation processes. We show that the F-box protein cyclin F plays an important role in checkpoint control following ionizing radiation. Cyclin F-depleted cells initiate checkpoint signalling after ionizing radiation, but fail to maintain G2 phase arrest and progress into mitosis prematurely. Importantly, cyclin F suppresses the B-Myb-driven transcriptional programme that promotes accumulation of crucial mitosis-promoting proteins. Cyclin F interacts with B-Myb via the cyclin box domain. This interaction is important to suppress cyclin A-mediated phosphorylation of B-Myb, a key step in B-Myb activation. In summary, we uncover a regulatory mechanism linking the F-box protein cyclin F with suppression of the B-Myb/cyclin A pathway to ensure a DNA damage-induced checkpoint response in G2.
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Affiliation(s)
- Ditte Kjærsgaard Klein
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark
| | - Saskia Hoffmann
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark
| | - Johanna K Ahlskog
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark
| | - Karen O'Hanlon
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark
| | - Marianne Quaas
- Department of Molecular Oncology, Medical School, University of Leipzig, Semmelweisstr. 14, 04103, Leipzig, Germany
| | - Brian D Larsen
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark
| | - Baptiste Rolland
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark
| | - Heike I Rösner
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark
| | - David Walter
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark
| | - Arne Nedergaard Kousholt
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark
| | - Tobias Menzel
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark
| | - Michael Lees
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark
| | - Jens Vilstrup Johansen
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark
| | - Juri Rappsilber
- Wellcome Trust Centre for Cell Biology, University of Edinburgh, Michael Swann Building, Kings Buildings, Mayfield Road, Edinburgh EH9 3JR, Scotland
| | - Kurt Engeland
- Department of Molecular Oncology, Medical School, University of Leipzig, Semmelweisstr. 14, 04103, Leipzig, Germany
| | - Claus Storgaard Sørensen
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark
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Kousholt AN, Menzel T, Sørensen CS. Correction: Kousholt, A.N. et al. Pathways for Genome Integrity in G2 Phase of the Cell Cycle. Biomolecules 2012, 2, 579-607. Biomolecules 2013; 3:72-4. [PMID: 26791467 PMCID: PMC4030877 DOI: 10.3390/biom3010072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 01/11/2013] [Accepted: 01/11/2013] [Indexed: 11/16/2022] Open
Affiliation(s)
- Arne Nedergaard Kousholt
- Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaløes Vej 5, DK-2200 Copenhagen N, Denmark.
| | - Tobias Menzel
- Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaløes Vej 5, DK-2200 Copenhagen N, Denmark.
| | - Claus Storgaard Sørensen
- Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaløes Vej 5, DK-2200 Copenhagen N, Denmark.
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Kousholt AN, Fugger K, Hoffmann S, Larsen BD, Menzel T, Sartori AA, Sørensen CS. CtIP-dependent DNA resection is required for DNA damage checkpoint maintenance but not initiation. ACTA ACUST UNITED AC 2012; 197:869-76. [PMID: 22733999 PMCID: PMC3384414 DOI: 10.1083/jcb.201111065] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
CtIP-dependent DNA end resection, which was previously thought to be necessary for CHK1 kinase activation and subsequent DNA damage checkpoint induction, is in fact only required for sustained checkpoint signaling. To prevent accumulation of mutations, cells respond to DNA lesions by blocking cell cycle progression and initiating DNA repair. Homology-directed repair of DNA breaks requires CtIP-dependent resection of the DNA ends, which is thought to play a key role in activation of ATR (ataxia telangiectasia mutated and Rad3 related) and CHK1 kinases to induce the cell cycle checkpoint. In this paper, we show that CHK1 was rapidly and robustly activated before detectable end resection. Moreover, we show that the key resection factor CtIP was dispensable for initial ATR–CHK1 activation after DNA damage by camptothecin and ionizing radiation. In contrast, we find that DNA end resection was critically required for sustained ATR–CHK1 checkpoint signaling and for maintaining both the intra–S- and G2-phase checkpoints. Consequently, resection-deficient cells entered mitosis with persistent DNA damage. In conclusion, we have uncovered a temporal program of checkpoint activation, where CtIP-dependent DNA end resection is required for sustained checkpoint signaling.
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Melcher R, Wilk M, Neun T, Hartmann E, Lührs H, Menzel T, Rosenwald A, Katzenberger T, Scheppach W, Scheurlen M, Kudlich T. HDGF ist ein früh in der Kolonkarzinogenese überexprimiertes, durch Butyrat reguliertes Onkogen. Z Gastroenterol 2010. [DOI: 10.1055/s-0030-1267713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Beck H, Menzel T, Syljuåsen RG, Sørensen CS. High-throughput siRNA screens using γH2AX as marker uncover key regulators of genome integrity in mammalian cells. Cell Cycle 2010; 9:2257-8. [PMID: 20699633 DOI: 10.4161/cc.9.12.12017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Buck T, Breithardt OA, Faber L, Fehske W, Flachskampf FA, Franke A, Hagendorff A, Hoffmann R, Kruck I, Kücherer H, Menzel T, Pethig K, Tiemann K, Voigt JU, Weidemann F, Nixdorff U. Erratum zu: Manual zur Indikation und Durchführung der Echokardiographie. Clin Res Cardiol 2010; 99:63-63. [PMID: 20082081 DOI: 10.1007/s00392-009-0097-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- T Buck
- Westdeutsches Herzzentrum Essen, Abt. Kardiologie, Universitätsklinikum Essen, Universitätsklinikum Duisburg-Essen, Hufelandstrasse 55, 45122, Essen, Germany,
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Herold G, Stephan B, Menzel T. Plasmaproteinspiegel unter postoperativer parenteraler Ernährung. Transfus Med Hemother 2009. [DOI: 10.1159/000220910] [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: 11/19/2022] Open
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Herold G, Stephan B, Menzel T. Serumspiegel und Urinausscheidung von Zink, Magnesium, Kalzium und Phosphat während der postoperativen parenteralen Ernährung. Transfus Med Hemother 2009. [DOI: 10.1159/000220233] [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: 11/19/2022] Open
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Herold G, Stephan B, Menzel T. Untersuchungen zum Verhalten von Bioelementen während parenteraler Langzeiternährung. Transfus Med Hemother 2009. [DOI: 10.1159/000220900] [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: 11/19/2022] Open
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Herold G, Stephan B, Menzel T. Die Spiegel der Plasmaproteine Transferrin, Retinol-bindendes Protein und Präalbumin in der postoperativen parenteralen Ernährung bei unterschiedlich dosierter Aminosäurenzufuhr. Transfus Med Hemother 2009. [DOI: 10.1159/000220882] [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: 11/19/2022] Open
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Herold G, Stephan B, Menzel T. Nebenwirkungen parenteral zugeführter Kohlenhydrate in der postoperativen Phase. Transfus Med Hemother 2009. [DOI: 10.1159/000220263] [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: 11/19/2022] Open
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Herold G, Stephan B, Menzel T. Untersuchungen zum Auftreten von Nebenwirkungen der Kohlenhydratzufuhr während parenteraler Langzeiternährung. Transfus Med Hemother 2009. [DOI: 10.1159/000220922] [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: 11/19/2022] Open
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Stephan B, Herold G, Menzel T, Henneberg U. Glukose- und Fruktoseverwertung sowie Insulinbedarf in der postoperativen parenteralen Ernährung. Transfus Med Hemother 2009. [DOI: 10.1159/000220062] [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: 11/19/2022] Open
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Jørgensen S, Elvers I, Trelle MB, Menzel T, Eskildsen M, Jensen ON, Helleday T, Helin K, Sørensen CS. The histone methyltransferase SET8 is required for S-phase progression. ACTA ACUST UNITED AC 2008; 179:1337-45. [PMID: 18166648 PMCID: PMC2373509 DOI: 10.1083/jcb.200706150] [Citation(s) in RCA: 187] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Chromatin structure and function is influenced by histone posttranslational modifications. SET8 (also known as PR-Set7 and SETD8) is a histone methyltransferase that monomethylates histonfe H4-K20. However, a function for SET8 in mammalian cell proliferation has not been determined. We show that small interfering RNA inhibition of SET8 expression leads to decreased cell proliferation and accumulation of cells in S phase. This is accompanied by DNA double-strand break (DSB) induction and recruitment of the DNA repair proteins replication protein A, Rad51, and 53BP1 to damaged regions. SET8 depletion causes DNA damage specifically during replication, which induces a Chk1-mediated S-phase checkpoint. Furthermore, we find that SET8 interacts with proliferating cell nuclear antigen through a conserved motif, and SET8 is required for DNA replication fork progression. Finally, codepletion of Rad51, an important homologous recombination repair protein, abrogates the DNA damage after SET8 depletion. Overall, we show that SET8 is essential for genomic stability in mammalian cells and that decreased expression of SET8 results in DNA damage and Chk1-dependent S-phase arrest.
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Affiliation(s)
- Stine Jørgensen
- Biotech Research and Innovation Centre and 2Centre for Epigenetics, University of Copenhagen, 2200 Copenhagen N, Denmark
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Melcher R, Al-Taie O, Kudlich T, Hartmann E, Maisch S, Steinlein C, Schmid M, Rosenwald A, Menzel T, Scheppach W, Luhrs H. SNP-Array genotyping and spectral karyotyping reveal uniparental disomy as early mutational event in MSS- and MSI-colorectal cancer cell lines. Cytogenet Genome Res 2007; 118:214-21. [PMID: 18000373 DOI: 10.1159/000108303] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2006] [Accepted: 11/27/2006] [Indexed: 12/31/2022] Open
Abstract
In this study nine colorectal cancer cell lines were analysed by 10K SNP-arrays and spectral karyotyping (SKY). Complex chromosomal alterations and breakpoints of deleted or translocated fragments found by SKY could further be characterized by SNP-array analysis. Interestingly many monoallelic regions identified by SNP-array analysis display no copy number alterations, representing uniparental disomy (UPD). It was demonstrated that UPD seems to be involved in activation of early-acting tumor suppressor genes in MSS- (APC, CDKN2A) and MSI- (MLH1, MSH2, APC, CDKN2A) colorectal cancer cell lines. Genes involved later on in the adenoma-carcinoma sequence (i.e. TP53/SMAD4) were not found to be inactivated by UPD. Furthermore, identified amplified monoallelic regions may include oncogenes activated by allele-specific-amplification (i.e. Cyclin D1). However, at present, the majority of the monoallelic regions located in the present study have not yet been associated with known tumor suppressor genes and oncogenes. Further studies are warranted to identify relevant genes in the respective regions and to further verify the results presented here.
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Affiliation(s)
- R Melcher
- Department of Medicine II, Division of Gastroenterology, University of Wurzburg, Wurzburg, Germany.
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Gostner A, Schäffer V, Theis S, Menzel T, Lührs H, Melcher R, Schauber J, Kudlich T, Dusel G, Dorbath D, Kozianowski G, Scheppach W. Effects of isomalt consumption on gastrointestinal and metabolic parameters in healthy volunteers. Br J Nutr 2007; 94:575-81. [PMID: 16197583 DOI: 10.1079/bjn20051510] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [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
The polyol isomalt (Palatinit®) is a well established sugar replacer. The impact of regular isomalt consumption on metabolism and parameters of gut function in nineteen healthy volunteers was examined in a randomised, double-blind, cross-over trial with two 4-week test periods. Volunteers received 30 g isomalt or 30 g sucrose daily as part of a controlled diet. In addition to clinical standard diagnostics, biomarkers and parameters currently discussed as risk factors for CHD, diabetes or obesity were analysed. Urine and stool Ca and phosphate excretions were measured. In addition, mean transit time, defecation frequency, stool consistency and weight were determined. Consumption of test products was affirmed by the urinary excretion of mannitol. Blood lipids were comparable in both phases, especially in volunteers with hyperlipidaemia, apart from lower apo A-1 (P=0·03) for all subjects. Remnant-like particles, oxidised LDL, NEFA, fructosamine and leptin were comparable and not influenced by isomalt. Ca and phosphate homeostasis was not affected. Stool frequency was moderately increased in the isomalt phase (P=0·006) without changes in stool consistency and stool water. This suggests that isomalt is well tolerated and that consumption of isomalt does not impair metabolic function or induce hypercalciuria. In addition, the study data indicate that isomalt could be useful in improving bowel function.
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Affiliation(s)
- A Gostner
- Department of Medicine, University of Würzburg, Josef-Schneider-Strasse 2, D-97080 Würzburg, Germany.
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Steinbrunn T, Kudlich T, Melcher R, Schauber J, Lührs H, Menzel T, Scheppach W. Auswirkungen enteraler Immunonutrition auf Proliferation, Differenzierung und Apoptose kolorektaler Karzinomzellen. Z Gastroenterol 2006. [DOI: 10.1055/s-2006-955519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Gostner A, Blaut M, Schäffer V, Kozianowski G, Theis S, Klingeberg M, Dombrowski Y, Martin D, Ehrhardt S, Taras D, Schwiertz A, Kleessen B, Lührs H, Schauber J, Dorbath D, Menzel T, Scheppach W. Effect of isomalt consumption on faecal microflora and colonic metabolism in healthy volunteers. Br J Nutr 2006; 95:40-50. [PMID: 16441915 DOI: 10.1079/bjn20051589] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Due to its low digestibility in the small intestine, a major fraction of the polyol isomalt reaches the colon. However, little is known about effects on the intestinal microflora. During two 4-week periods in a double-blind, placebo-controlled, cross-over design, nineteen healthy volunteers consumed a controlled basal diet enriched with either 30 g isomalt or 30 g sucrose daily. Stools were collected at the end of each test phase and various microbiological and luminal markers were analysed. Fermentation characteristics of isomalt were also investigated in vitro. Microbiological analyses of faecal samples indicated a shift of the gut flora towards an increase of bifidobacteria following consumption of the isomalt diet compared with the sucrose diet (P<0.05). During the isomalt phase, the activity of bacterial beta-glucosidase decreased (P<0.05) whereas beta-glucuronidase, sulfatase, nitroreductase and urease remained unchanged. Faecal polyamines were not different between test periods with the exception of cadaverine, which showed a trend towards a lower concentration following isomalt (P=0.055). Faecal SCFA, lactate, bile acids, neutral sterols, N, NH3, phenol and p-cresol were not affected by isomalt consumption. In vitro, isomalt was metabolized in several bifidobacteria strains and yielded high butyrate concentrations. Isomalt, which is used widely as a low-glycaemic and low-energy sweetener, has to be considered a prebiotic carbohydrate that might contribute to a healthy luminal environment of the colonic mucosa.
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Affiliation(s)
- A Gostner
- German Institute of Human Nutrition Potsdam-Rehbrücke, Department of Gastrointestinal Microbiology, Arthur-Scheunert-Allee 114-116, D-14558 Nuthetal, Germany.
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Zollner U, Ahmadi M, Zollner KP, Menzel T, Müller T, Dietl J. Frühdiagnose eines Gestationsdiabetes durch den Insulin- oder C-Peptid-Wert aus dem Fruchtwasser bei der Frühamniozentese? Z Geburtshilfe Neonatol 2004. [DOI: 10.1055/s-2003-818276] [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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Scheppach W, Luehrs H, Melcher R, Gostner A, Schauber J, Kudlich T, Weiler F, Menzel T. Antiinflammatory and anticarcinogenic effects of dietary fibre. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.clnu.2004.09.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Schauber J, Svanholm C, Termén S, Iffland K, Menzel T, Scheppach W, Melcher R, Agerberth B, Lührs H, Gudmundsson GH. Expression of the cathelicidin LL-37 is modulated by short chain fatty acids in colonocytes: relevance of signalling pathways. Gut 2003; 52:735-41. [PMID: 12692061 PMCID: PMC1773650 DOI: 10.1136/gut.52.5.735] [Citation(s) in RCA: 291] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
Abstract
BACKGROUND AND AIMS Short chain fatty acids (SCFA) exert profound effects on the colonic mucosa. In particular, SCFA modulate mucosal immune functions. The antimicrobial cathelicidin LL-37 is expressed by colon epithelial cells. In the present study the effect of SCFA on LL-37 expression was investigated. METHODS LL-37 expression in vivo was assessed by immunohistochemistry. Real time quantitative reverse transcription-polymerase chain reaction was employed to determine LL-37 expression in colonocytes in vitro after treatment with various cytokines, SCFA, or flavone. LL-37 levels were correlated to cell differentiation which was determined by alkaline phosphatase (AP) activity. In addition, intracellular signalling pathways such as MEK-ERK (mitogen/extracellular signal protein kinase (MEK)/extracellular signal regulated protein kinase (ERK)) and p38/mitogen activated protein (MAP) kinase were explored. RESULTS In vivo, LL-37 expression in healthy mucosa was restricted to differentiated epithelial cells in human colon and ileum. In colonocytes, increased LL-37 expression associated with cell differentiation was detected in vitro following treatment with butyrate, isobutyrate, propionate, and trichostatin A. Flavone induced LL-37 transcription but did not affect AP activity while cytokines had no effect. To dissect pathways mediating differentiation and LL-37 expression, specific inhibitors were applied. Inhibition of the protein kinase MEK enhanced butyrate induced AP activity while LL-37 expression in colon epithelial cells was blocked. In contrast, inhibition of p38/MAP kinase blocked cell differentiation without inhibiting LL-37 expression. CONCLUSIONS Expression of the cathelicidin LL-37 in colonocytes and cellular differentiation are separately modulated by SCFA via distinct signalling pathways. These data may provide a rationale for dietary modulation of mucosal defence mechanisms.
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Affiliation(s)
- J Schauber
- Department of Medicine, Division of Gastroenterology, University of Würzburg, Germany.
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Melcher R, Koehler S, Steinlein C, Schmid M, Mueller CR, Luehrs H, Menzel T, Scheppach W, Moerk H, Scheurlen M, Koehrle J, Al-Taie O. Spectral karyotype analysis of colon cancer cell lines of the tumor suppressor and mutator pathway. Cytogenet Genome Res 2003; 98:22-8. [PMID: 12584437 DOI: 10.1159/000068544] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [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: 11/19/2022] Open
Abstract
BACKGROUND AND AIMS Microsatellite instability (MSI) is characterized by the size variation of microsatellites in tumor DNA as compared to matching normal DNA due to defects in the mismatch repair system. To examine the chromosomal differences in microsatellite-stable (MSS) and -unstable (MSI) tumors in detail, we analyzed MSS (Caco-2, Colo-205, SW948) and MSI (HCT-15, HCT-116, LoVo) cell lines by spectral karyotyping (SKY). METHODS SKY is a sensitive method to detect chromosome aberrations by visualizing each chromosome in a different color. Metaphases were hybridized with a SKY probe mixture. Images were visualized with the SpectraCube system and analyzed with the SKYview imaging software. RESULTS The average number of chromosomes was 49 in LoVo, 45 in HCT-116, 46 in HCT-15, 71 in Colo-205, 89 in Caco-2 and 66 in SW-948. Three aberrant chromosomes were detected in LoVo, three in HCT-116, two in HCT-15, seventeen in Colo-205, fourteen in Caco-2 and nine in SW948. CONCLUSION The karyotypes of MSS colon cancer cells displayed complex numerical and structural aberrations. In contrast the chromosomes of MSI colon cancer cells were mostly unaltered but displayed a few isolated numerical and structural aberrations. We speculate that these isolated aberrations may be specifically involved in the pathogenesis of MSI tumors.
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Affiliation(s)
- R Melcher
- Department of Medicine, University of Würzburg, Germany.
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Menzel T, Schauber J, Kreth F, Kudlich T, Melcher R, Gostner A, Scheppach W, Lührs H. Butyrate and aspirin in combination have an enhanced effect on apoptosis in human colorectal cancer cells. Eur J Cancer Prev 2002; 11:271-81. [PMID: 12131661 DOI: 10.1097/00008469-200206000-00011] [Citation(s) in RCA: 20] [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: 01/30/2023]
Abstract
Laboratory and epidemiological studies suggest that butyrate, a metabolic product of microbial fermentation of dietary fibre, and aspirin, a non-steroidal antiphlogistic drug, both reduce the risk of developing colon cancer. Notably, few data exist on potential interactions of these two substances. In this study, the effects of a butyrate-aspirin combination on human colon cancer cells were compared with treatment with aspirin or butyrate alone. Both substances decreased proliferation and induced differentiation and apoptosis. Butyrate reduced mutant p53 expression, whereas aspirin did not affect p53 expression. Butyrate-induced apoptosis correlated with an increase in Bak expression and a decrease in the expression of Bcl-XL. Aspirin had no effect on the investigated apoptosis-controlling factors. The antiproliferative and pro-apoptotic effects of the butyrate-aspirin combination were markedly enhanced. The combination resulted in a stronger decrease in the expression of PCNA and cdk2. Our data suggest that the anticarcinogenic effect of aspirin might effectively be augmented by combination with the short-chain fatty acid butyrate.
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Affiliation(s)
- T Menzel
- Division of Gastroenterology, Department of Medicine, University of Würzburg, Germany.
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Lührs H, Gerke T, Müller JG, Melcher R, Schauber J, Boxberge F, Scheppach W, Menzel T. Butyrate inhibits NF-kappaB activation in lamina propria macrophages of patients with ulcerative colitis. Scand J Gastroenterol 2002; 37:458-66. [PMID: 11989838 DOI: 10.1080/003655202317316105] [Citation(s) in RCA: 327] [Impact Index Per Article: 14.9] [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: 02/04/2023]
Abstract
BACKGROUND In ulcerative colitis (UC) the activation (i.e. nuclear translocation) of nuclear factor kappa B (NF-kappaB) is an important step in the regulation of cytokines secreted by lamina propria macrophages. Clinical trials suggest anti-inflammatory effects of locally administered butyrate in UC. The potential effects of butyrate on NF-kappaB activation in lamina propria macrophages of UC patients were investigated. METHODS Eleven patients with distal UC were treated for up to 8 weeks with butyrate at 100 mM (n = 6) or placebo (n = 5) enemas. At entry and after 4 and 8 weeks, clinical status was noted and intestinal inflammation was graded endoscopically and histologically. Double-staining with antibodies against NF-kappaB (p65) and CD68 was employed to detect NF-kappaB and macrophages, respectively. RESULTS In untreated patients, nuclear translocation of NF-kappaB was detectable in virtually all macrophages. Butyrate treatment for 4 and 8 weeks resulted in a significant reduction in the number of macrophages being positive for nuclear translocated NF-kappaB. In addition, butyrate significantly reduced both the number of neutrophils in crypt and surface epithelia and of the lamina propria lymphocytes/plasma cells. These findings correlated with a significant decrease in the Disease Activity Index (DAI). CONCLUSIONS The decrease in DAI and mucosal inflammation in butyrate-treated patients is associated with a reduction of NF-kappaB translocation in lamina propria macrophages. Since the inflammatory process in UC is mainly sustained by macrophage-derived cytokines, the known anti-inflammatory effects of butyrate may in part be mediated by an inhibition of NF-kappaB activation in these macrophages.
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Affiliation(s)
- H Lührs
- Dept. of Medicine, Institute of Pathology, University of Würzburg, Germany.
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Menzel T, Kramm T, Brückner A, Mohr-Kahaly S, Mayer E, Meyer J. Quantitative assessment of right ventricular volumes in severe chronic thromboembolic pulmonary hypertension using transthoracic three-dimensional echocardiography: changes due to pulmonary thromboendarterectomy. Eur J Echocardiogr 2002; 3:67-72. [PMID: 12067537 DOI: 10.1053/euje.2001.0129] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
AIMS Evaluation of a three-dimensional reconstruction method to show the changes of right ventricular volume and systolic function when patients undergo pulmonary thromboendarterectomy for chronic thromboembolic pulmonary hypertension. METHODS AND RESULTS In the examination of 11 patients (four female, seven male; age 56+/-10 years) before and after pulmonary thromboendarterectomy, end-diastolic and end-systolic right ventricular volumes were determined as a sum total of the calculated volumes of derived parallel slices of the right ventricle. Using a Tomtec workstation and a Vingmed CFM 800 echocardiography device, the acquired data were ECG-and respiration-triggered in the course of transthoracic examination, using step intervals of 5 degrees. The ventricular outline was traced manually on 5mm slices from longitudinal cut planes. For subsequent correction, their area measurements were displayed and the volume cross-checked against the volume from orthogonal cut planes. End-diastolic and end-systolic volumes could be quantified in 11/11 cases before surgery, but data could only be attained for 9/11 patients after surgery, because a limited apical window rendered the postoperative three-dimensional reconstruction impossible in two cases. Before surgery, right ventricular size was larger than normal and systolic function was clearly impaired in all of the patients (end-diastolic volume: 121+/-37 ml; end-systolic volume 91+/-30 ml; ejection fraction 25+/-8%). The decrease in mean pulmonary artery pressure after surgery was significant (47+/-8 vs 26+/-8 mmHg; P<0.05). End-diastolic and end-systolic right ventricular volumes had been reduced (80+/-33 ml and 54+/-31 ml respectively), and the ejection fraction had increased (36+/-9%). CONCLUSIONS Successfully performed pulmonary thromboendarterectomy leads to a significant reduction of right ventricular chamber size and improvement of systolic function, which can be determined with great precision and quite easily, using transthoracic three-dimensional echocardiography. Published by Elsevier Science Ltd. All rights reserved.
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Affiliation(s)
- T Menzel
- 2nd Medical Clinic (Department of Cardiology), Johannes Gutenberg University, Langenbeckstrasse 1, D-55101 Mainz, Germany.
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Fischer TA, Menzel T, Kölsch B, Kolfhaus B, Mohr-Kahaly S. [Quantitative analysis of the left main coronary artery by 3D echocardiography. Role, possibilities and limitations of noninvasive imaging of the left coronary artery]. Z Kardiol 2002; 91:33-9. [PMID: 11963205 DOI: 10.1007/s392-002-8369-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The left main coronary artery was investigated in 30 patients using a transesophageal approach, and a 3D reconstruction of the 2D databases was performed. Two groups of patients were analyzed. First, patients with calcified aortic stenosis were investigated and the reconstructed data obtained were compared to the left ventricular angiogram of the left coronary artery. Second, the 2D databases of patients with non-calcified aortic valve and aortic anulus were reconstructed using the 3D technique. In group 1 the estimate in size of the left ventricular coronary artery was closely related to the diameter of the left coronary artery as obtained by the coronary angiogram (mean difference 0.08 mm, interval of confidence at 95%, -0.48 and +0.32 mm). In both groups a substantial increase in imaging of the left coronary artery was obtained compared to the standard 2D echocardiographic view (% in group 1, and % in group 2, respectively). Independent of the 3D reconstruction of the left coronary artery in the any-plane mode, an orthogonal imaging of the artery could be obtained in only 15% of patients in group 1 but in 40% of patients in group 2. We conclude that 3D reconstruction of the left coronary artery (LAD) is superior to 2D echocardiography in echo-imaging of the proximal part of the LAD and correlates strongly to the diameters measured in the left coronary angiogram. In patients with major calcification of the aortic anulus and/or a calcified native aortic valve this approach is associated with multiple artifacts in imaging. The rapid technical evolution in this technique including improvement in computer technology and appropriate software may ensure a further important role of 3D echo imaging in noninvasive visualization of the normal and diseased left main coronary artery.
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Affiliation(s)
- T A Fischer
- Allgemeininternistische Intensivstation/Herzkatheterlabor II, Medizinische Klinik und Poliklinik Johannes-Gutenberg-Universität Mainz Langenbeckstr. 1 55101 Mainz, Germany.
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Lührs H, Gerke T, Boxberger F, Backhaus K, Melcher R, Scheppach W, Menzel T. Butyrate inhibits interleukin-1-mediated nuclear factor-kappa B activation in human epithelial cells. Dig Dis Sci 2001; 46:1968-73. [PMID: 11575451 DOI: 10.1023/a:1010699418024] [Citation(s) in RCA: 31] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Nuclear factor-kappa B (NF-kappaB) is a critical transcription factor for the inducible expression of multiple genes involved in inflammation. NF-kappaB is sequestered in the cytoplasm by inhibitory IkappaB proteins. Extracellular stimuli, notably interleukin-1beta (IL-1beta) and tumor necrosis factor alpha (TNF-alpha) activate NF-kappaB nuclear translocation via IkappaB phosphorylation and degradation. Since previous reports suggest that the short chain fatty acid butyrate has antiinflammatory properties, the effects of butyrate on NF-kappaB nuclear translocation in human epithelial cells (HeLa229) were tested. In cells pretreated with butyrate, a time- and dose-dependent inhibition of IL-1beta-mediated NF-kappaB nuclear translocation was observed. However, IkappaB alpha phosphorylation and degradation occurred rapidly in both butyrate pretreated and nonpretreated cells, respectively. These data indicate that inhibition of IL-1beta-induced NF-kappaB activation by butyrate does not require an intact IkappaB alpha protein.
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Affiliation(s)
- H Lührs
- Department of Medicine, University of Würzburg, Germany
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38
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Davido DJ, Richter F, Boxberger F, Stahl A, Menzel T, Lührs H, Löffler S, Dusel G, Rapp UR, Scheppach W. Butyrate and propionate downregulate ERK phosphorylation in HT-29 colon carcinoma cells prior to differentiation. Eur J Cancer Prev 2001; 10:313-21. [PMID: 11535873 DOI: 10.1097/00008469-200108000-00004] [Citation(s) in RCA: 19] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
We have characterized the effects of different short-chain fatty acids (SCFAs) on cell growth and differentiation as well as the phosphorylation state of ERK1 and 2 in the human colon adenocarcinoma cell line HT-29. Of the five SCFAs tested, only butyrate and propionate impaired cellular proliferation. Moreover, butyrate and propionate specifically resulted in a decrease in ERK1 and 2 phosphorylation at 3 and 6 hours post-treatment, suggesting a correlation between the ability of these SCFAs to inhibit cellular proliferation and decrease ERK phosphorylation. Notably, the decrease in ERK phosphorylation was observed prior to the induction of the differentiation markers alkaline phosphatase (AP) and carcinoembryonic antigen (CEA) by butyrate and propionate from days 6 to 18 post-treatment. In the case of butyrate- and propionate-induced differentiation, ERK phosphorylation is a marker and may play a role in the proliferation and/or differentiation states of this cell line.
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Affiliation(s)
- D J Davido
- Medizinische Klinik, Universität Würzburg, Josef Schneider Str. 2, 97080 Würzburg, Germany
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39
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Lührs H, Gerke T, Schauber J, Dusel G, Melcher R, Scheppach W, Menzel T. Cytokine-activated degradation of inhibitory kappaB protein alpha is inhibited by the short-chain fatty acid butyrate. Int J Colorectal Dis 2001; 16:195-201. [PMID: 11515677 DOI: 10.1007/s003840100295] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.4] [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: 02/04/2023]
Abstract
Butyrate, a short-chain fatty acid, is generated by anaerobic fermentation within the colon. Clinical trials suggest that short-chain fatty acids ameliorate inflammation in ulcerative colitis. Nuclear factor (NF) kappaB, an inducible transcription factor that is activated in inflamed colonic tissue, is sequestered to the cytoplasm by its inhibitory IkappaB proteins. The anti-inflammatory effects of butyrate are associated with an inhibition of NF-kappaB nuclear translocation. To investigate the mechanism of NF-kappaB inhibition we examined the effects of butyrate on IkappaBalpha. Human adenocarcinoma cells (SW480, SW620, and HeLa229) were treated with butyrate for up to 48 h followed by tumor necrosis factor (TNF) alpha stimulation. NF-kappaB was detected by immunofluorescence staining with an antibody against its p65 subunit. Levels of IkappBalpha and phosphorylated IkappaBalpha were determined by western blot. Stimulation with TNFalpha resulted in rapid phosphorylation and degradation of IkappaBalpha followed by NF-kappaB nuclear translocation. Butyrate pretreatment successfully inhibited NF-kappaB activation. Pretreatment of adenocarcinoma cells with butyrate is associated with inhibition of TNFalpha-mediated phosphorylation and degradation of IkappaBalpha and effective blocking of NF-kappaB nuclear translocation. The anti-inflammatory effects of butyrate may at least in part be mediated by an inhibition of IkappaBalpha mediated activation of NF-kappaB.
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Affiliation(s)
- H Lührs
- Department of Medicine, University of Würzburg, Germany.
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40
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Abstract
A 69-year-old male presented with symptoms of fulminant lung embolism and, despite immediate therapy with plasminogen activator, died of acute right heart failure. At autopsy multiple tumor cell emboli were detected in small pulmonary vessels in addition to widespread liver metastases from an urothelial carcinoma. - In a 23-year-old female a malignant gastric ulcer and multiple liver metastases were diagnosed at initial presentation. She too died from pulmonary hypertension due to a series of lung embolisms which occurred despite heparin therapy. At autopsy, many small pulmonary arteries were filled with adenocarcinoma cells; the primary gastric tumor and liver metastases were confirmed. These cases demonstrate that the shedding of tumor cells from hepatic metastases can obstruct the pulmonary vessels and lead to acute cor pulmonale. Tumor cell emboli should be considered in the differential diagnosis of acute pulmonary hypertension, especially in patients with a known tumor. They may, however, also represent the first clinical signs of previously unrecognized malignancy.
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Affiliation(s)
- W Scheppach
- Medizinische Klinik und, Institut für Pathologie der Charité, Berlin, Germany.
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Abstract
Low-digestible carbohydrates represent a class of enzyme-resistant saccharides that have specific effects on the human gastrointestinal tract. in the small bowel, they affect nutrient digestion and absorption, glucose and lipid metabolism and protect against known risk factors of cardiovascular disease. In the colon they are mainly degraded by anaerobic bacteria in a process called fermentation. As a consequence, faecal nitrogen excretion is enhanced, which is used clinically to prevent or treat hepatic encephalopathy. Low-digestible carbohydrates are trophic to the epithelia of the ileum and colon, which helps to avoid bacterial translocation. Short-chain fatty acids are important fermentation products and are evaluated as new therapeutics in acute colitis. They are considered in the primary prevention of colorectal cancer. The bifidogenic effect of fructo-oligosaccharides merits further attention, Unfermented carbohydrates increase faecal bulk and play a role in the treatment of chronic functional constipation, symptomatic diverticulosis and, possibly, the irritable bowel syndrome. In conclusion, low-digestible carbohydrates may play a role in the maintenance of human digestive health. However, the strength of evidence differs between disease entities.
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Affiliation(s)
- W Scheppach
- Department of Medicine, University of Wuerzburg, Germany.
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Eck M, Schmausser B, Scheller K, Toksoy A, Kraus M, Menzel T, Müller-Hermelink HK, Gillitzer R. CXC chemokines Gro(alpha)/IL-8 and IP-10/MIG in Helicobacter pylori gastritis. Clin Exp Immunol 2000; 122:192-9. [PMID: 11091274 PMCID: PMC1905774 DOI: 10.1046/j.1365-2249.2000.01374.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Infection with Helicobacter pylori causes chronic active gastritis, which is characterized by neutrophils infiltrating the gastric epithelial layer and the underlying lamina propria as well as by T, B lymphocytes and macrophages accumulating in the lamina propria. In this study, the chemokine profile responsible for the recruitment of these inflammatory cells is investigated. Using both RNA/RNA in situ hybridization and immunohistochemistry, the expression of the neutrophil and/or lymphocyte-attractant CXC chemokines growth-related oncogene alpha (Gro(alpha)), IL-8, interferon-gamma (IFN-gamma)-inducible protein-10 (IP-10), monokine induced by IFN-gamma (MIG) and the CC chemokines macrophage inflammatory protein-1alpha (MIP-1alpha), -1beta, regulated on activation normal T cell expressed and secreted (RANTES) and monocyte chemoattractant protein-1 (MCP-1) is studied and microanatomically localized in the gastric mucosa. Macrophages in the lamina propria at sites with neutrophil infiltration and gastric epithelium infiltrated by neutrophils highly expressed the neutrophil-attractant chemokines Gro(alpha) and IL-8. Additionally, Gro(alpha) and IL-8 were expressed by neutrophils themselves localized within gastric epithelium, in the foveolar lumen and in the cellular debris overlying mucosal erosion. IP-10 and to a lower extent MIG, both selectively chemotactic for inflammatory T cells, were expressed by endothelial cells of gastric mucosal vessels and by mononuclear cells at sites with T cell infiltration. Expression of all other CC chemokines tested was significantly lower. These in vivo data indicate that a set of predominantly CXC chemokines modulates the inflammation in H. pylori gastritis. Gro(alpha) and IL-8 may play an important role in neutrophil trafficking from the mucosal vessel into the gastric epithelium, whereas IP-10 and MIG contribute to the recruitment of inflammatory T cells into the mucosa.
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Affiliation(s)
- M Eck
- Institut für Pathologie, Universität Würzburg, Germany.
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Menzel T, Wagner S, Kramm T, Mohr-Kahaly S, Mayer E, Braeuninger S, Meyer J. Pathophysiology of impaired right and left ventricular function in chronic embolic pulmonary hypertension: changes after pulmonary thromboendarterectomy. Chest 2000; 118:897-903. [PMID: 11035654 DOI: 10.1378/chest.118.4.897] [Citation(s) in RCA: 136] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
STUDY OBJECTIVES This study sought to evaluate the pathophysiology of left and right heart failure in patients with chronic thromboembolic pulmonary hypertension (CTEPH) who were hospitalized to undergo pulmonary thromboendarterectomy (PTE). DESIGN Thirty-nine patients (16 women and 23 men; mean +/- SD age, 55+/-12 years) with severe CTEPH were examined before and 13+/-8 days after PTE by way of transthoracic echocardiography and right heart catheterization. MEASUREMENTS AND RESULTS Examination results confirmed in all cases that before surgery the right ventricles were enlarged and systolic function was impaired. Moderate to severe tricuspid valve regurgitation was observed. Left ventricular eccentricity indexes reflected a leftward displacement of the interventricular septum. End-diastolic left ventricular size and systolic function had decreased, and the left ventricular filling pattern showed impaired diastolic function. After surgery, mean pulmonary artery pressure was significantly lower (48+/- 10 mm Hg vs. 25+/-7 mm Hg; p<0.05). The calculated end-diastolic and end-systolic right ventricular areas had decreased: 30+/-7 cm(2) vs 21 +/-5 cm(2) (p<0.05) and 24+/-6 cm(2) vs. 14+/-4 cm(2) (p<0.05), respectively. Right ventricular fractional area change had increased (20+/-7% vs. 33+/-8%; p<0.05). Most of the patients exhibited a marked decrease in the severity of tricuspid regurgitation. Septal motion, left ventricular systolic function, and diastolic filling pattern returned to normal values (early to late diastolic left ventricular inflow ratio, 0.70+/-0.33 vs. 1.35+/-0.51; p<0.05). The mean cardiac index also improved (2.7+/-0.6 L/min/m(2) vs. 3.7+/-0.8 L/min/m(2)). CONCLUSIONS In CTEPH, functions are impaired in the right as well as the left ventricles of the heart. Improved lung perfusion and the reduction of right ventricular pressure overload are direct results of PTE, which in turn bring a profound reduction of right ventricular size and a recovery of systolic function. Normalization of interventricular septal motion as well as improved venous return to the left atrium lead to a normalization of left ventricular diastolic and systolic function, and the cardiac index improves.
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MESH Headings
- Adult
- Aged
- Chronic Disease
- Echocardiography, Doppler
- Endarterectomy
- Female
- Humans
- Hypertension, Pulmonary/complications
- Hypertension, Pulmonary/physiopathology
- Hypertension, Pulmonary/surgery
- Male
- Middle Aged
- Myocardial Contraction
- Postoperative Period
- Prospective Studies
- Pulmonary Embolism/complications
- Pulmonary Embolism/physiopathology
- Pulmonary Embolism/surgery
- Pulmonary Wedge Pressure
- Thrombectomy/methods
- Ventricular Dysfunction, Left/diagnostic imaging
- Ventricular Dysfunction, Left/etiology
- Ventricular Dysfunction, Left/physiopathology
- Ventricular Dysfunction, Right/diagnostic imaging
- Ventricular Dysfunction, Right/etiology
- Ventricular Dysfunction, Right/physiopathology
- Ventricular Function/physiology
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Affiliation(s)
- T Menzel
- 2nd Medical Clinic, Department of Cardiology, and Clinic for Cardiothoracic and Vascular Surgery, Johannes Gutenberg University, Langenbeckstrasse 1, D-55101 Mainz, Germany.
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Scheppach W, Boxberger F, Lührs H, Melcher R, Menzel T. [Effect of nutrition factors on the pathogenesis of colorectal carcinoma]. Zentralbl Chir 2000; 125 Suppl 1:5-7. [PMID: 10929638] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
There is convincing evidence that nutrition affects colorectal carcinogenesis in a complex fashion. Dietary components either promote or inhibit the carcinogenic process. The composition of dietary fats seems to be less important as a promoting factor than a positive energy balance, especially in combination with low physical activity. Excessive consumption of red meat is associated with increased risk, which may be due to the heme contained in myoglobin. Alcohol stimulates cell proliferation in the rectum and may thus increase cancer risk. Complex carbohydrates (e.g., dietary fiber) are degraded in the colon to short-chain fatty acids which exhibit protective effects in experimental models of carcinogenesis. The putative protection from vitamins and trace elements merits further attention.
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Affiliation(s)
- W Scheppach
- Schwerpunkt Gastroenterologie, Medizinische Universitätsklinik Würzburg.
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45
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46
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Melcher R, Steinlein C, Feichtinger W, Müller CR, Menzel T, Lührs H, Scheppach W, Schmid M. Spectral karyotyping of the human colon cancer cell lines SW480 and SW620. Cytogenet Cell Genet 2000; 88:145-52. [PMID: 10773689 DOI: 10.1159/000015508] [Citation(s) in RCA: 30] [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] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The cell lines SW480 and SW620, derived from different stages of colon carcinoma in the same patient, have been used for a number of biochemical, immunological, and genetic studies on colon cancer. A comparative analysis of their karyotypes may identify chromosomal aberrations that might represent markers for metastatic spread. In the present study spectral karyotyping (SKY) was applied to these two colon cancer cell lines. Compared to previously reported G-banded karyotypes, 9 (SW480) and 7 (SW620) markers were identical, 3 (SW480) and 3 (SW620) markers could be redefined, 5 (SW480) and 8 (SW620) markers were newly identified, and 4 (SW480) and 5 (SW620) of the previous described markers could not be confirmed. The redefined aberrations include very complex rearrangements, such as a der(16) t(3;16;1;16;8;16; 1;16;10) and a der(18)t(18;15;17)(q12; p11p13;??) in SW620 and a der(19)t(19;8;19;5) in SW480, that have not been identified by conventional banding techniques. The resulting chromosome gains (5q11-->5q15, 7pter-->q22, 11, 13q14-->qter, 20pter-->p12, X) and losses (8pter-->p2, 18q12-->qter, Y) found in both SW480 and SW620 were in good agreement with those frequently described in colorectal tumors as primary changes in the stem cell. Abnormalities found exclusively in SW620 cells only (gains of 5pter-->5q11, 12q12-->q23, 15p13-->p11, and 16q21-->q24 and losses of 2pter-->2p24, 4q28-->qter, and 6q25-->qter) can be viewed as changes that occurred in a putative metastatic founder cell.
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Affiliation(s)
- R Melcher
- Institute of Human Genetics, University of Würzburg, Germany
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47
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48
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Geil S, Rao L, Menzel T, Genth-Zotz S, Wittlinger T, Voigtländer T, Mohr-Kahaly S. [Determination of left ventricular mass by transthoracic three-dimensional echocardiography in patients with dilated cardiomyopathy]. Z Kardiol 1999; 88:922-31. [PMID: 10643060 DOI: 10.1007/s003920050370] [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] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Conventional echocardiographic methods of measuring left ventricular mass (LVM) are limited by assumptions of ventricular geometry and image plane positioning. Three-dimensional (3D) echocardiography offers a promising new approach for more accurate determination of LVM. This study was performed to compare LVM measurement by one- (1D), two- (2D), and 3D echocardiography with magnetic resonance imaging (MRI) in patients (pts) with dilated cardiomyopathy (DCM). 36 pts (age 18-74) with DCM underwent imaging by conventional 1D and 2D echocardiography as well as transthoracic 3D echocardiographic data acquisition. Also, pts were imaged with cardiac MRI. Due to echocardiographic and MRI quality and because of exclusion criteria's for MRI, it was not possible to accomplish each LVM determination method for each patient. LVM was determined by Devereux and area-length algorithm for the conventional echocardiography. 3D echocardiographic data was calculated after manual delineation of endo- and epicardial boundaries--slice by slice (5 mm)--in 3 perpendicular cut planes. LVM was determined by multiplying the myocardial volume by the specific density of the myocardium. To determine LVM in MRI, the even summation of slices method for myocardial volume measurement was used defined by the endo- and epicardium in short axis images. There was no significant correlation (r = 0.42) for measuring LVM between 1D echocardiography and MRI in pts with DCM. A significant correlation was obtained between 2D (r = 0.64, p < 0.01) echocardiography and MRI as well between 3D (r = 0.78, p < 0.01) and MRI in determination of LVM. Compared with 1D and 2D echocardiography, the 3D analysis achieved a significantly higher agreement with the results of the MRI (1D: 399.2 g, 2D: 285.9 g, 3D: 172.6 g versus MRI: 199.1 g). Interobserver variability was 5.1% for measuring LVM by 3D echocardiography (1D: 11.2%, 2D: 9.1%). In conclusion, in pts with DCM the determination of LVM was incompletely characterized by 1D and 2D echocardiography compared with results of MRI. The best correlation and high agreement for determination of LVM was obtained with 3D echocardiography compared with MRI.
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Affiliation(s)
- S Geil
- II. Medizinische Klinik und Poliklinik, Johannes-Gutenberg-Universität Mainz
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49
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Kramm T, Mayer E, Dahm M, Guth S, Menzel T, Pitton M, Oelert H. Long-term results after thromboendarterectomy for chronic pulmonary embolism. Eur J Cardiothorac Surg 1999; 15:579-83; discussion 583-4. [PMID: 10386400 DOI: 10.1016/s1010-7940(99)00076-7] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVE In patients with chronic thromboembolic pulmonary hypertension, pulmonary vascular resistance (PVR) can be reduced by pulmonary thromboendarterectomy (PTE). In this study, long-term symptomatic and hemodynamic effects were investigated. METHODS Twenty-two patients (12 female, 10 male, mean age 40 years, preoperative NYHA functional class II/III/IV: n = 1/12/9) were re-evaluated 48-72 months (mean 60 months) after surgery. In addition to clinical assessment, radiologic, hemodynamic and echocardiographic investigations were performed. RESULTS All patients reported a marked improvement of their clinical condition. At follow-up, 11 patients were identified as NYHA class I, 10 as NYHA class II and one patient was in class III. PVR and mean pulmonary artery pressure (mPAP) were significantly reduced (preoperative PVR 800+/-274 dynes/s per cm(-5), follow-up PVR 180+/-28.3 dynes/s per cm(-5); P < 0.001; preoperative mPAP 48.5+/-7.4 mmHg, follow-up mPAP 27.5+/-4.9 mmHg; P < 0.001). There was also a significant increase in arterial blood oxygen tension (preoperative PaO2 59+/-10 mmHg; follow-up PaO2 84+/-12 mmHg; P < 0.001). Chest roentgenograms and echocardiographic examinations revealed significantly decreased right heart dimensions and a recovery of right heart function. CONCLUSION In patients with severe chronic thromboembolic pulmonary hypertension, persistent symptomatic and hemodynamic improvements can be achieved by PTE.
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Affiliation(s)
- T Kramm
- Department of Cardiothoracic- and Vascular Surgery, Johannes Gutenberg University Hospital, Mainz, Germany.
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50
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Kröger MJ, Menzel T, Gschwend JE, Bergmann L. Life quality of patients with metastatic renal cell carcinoma and chemo-immunotherapy--a pilot study. Anticancer Res 1999; 19:1553-5. [PMID: 10365144] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Renal cell cancer (RCC) accounts for 2-3% of all malignant tumors in adults. Due to the indolent course of disease and the few signs and symptoms in early stages the majority of patients presents with metastatic disease when diagnosed. The aims of systemic therapy of RCC are therefore palliative. Recent research shows the key role of immune mechanisms in the course of RCC. The therapeutic use of cytokines, mainly interleukin-2 (IL-2) and interferon-alpha (IFN) results in improvement of remission rates. To date it is unknown to what extent multiple cycles of chemo-immunotherapy alter the life quality (LQ) of patients with metastatic RCC. We monitored life quality during therapy in a three-armed protocol with interferon-alpha 2a, interleukin-2, 5-fluorouracil (5-FU), isotretinoin (ISO) and vinblastin (VBL). Life quality was impaired by two factors: response to chemo-immunotherapy and therapy side effects. A steep decrease of LQ-scores was seen in week 1 of therapy, LQ improved then for patients with stable disease (SD) and partial remission (PR) but not for those with progressive disease (PD).
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Affiliation(s)
- M J Kröger
- Medizinische Klinik, Universitätsklinik Ulm, Germany
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