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Hildenbrand FF, Illi B, von Felten S, Bachofner J, Gawinecka J, von Eckardstein A, Müllhaupt B, Mertens JC, Blümel S. Evaluation of soluble suppression of tumorigenicity 2 (sST2) as serum marker for liver fibrosis. BMC Gastroenterol 2024; 24:54. [PMID: 38291388 PMCID: PMC10825988 DOI: 10.1186/s12876-023-03116-4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 12/29/2023] [Indexed: 02/01/2024] Open
Abstract
BACKGROUND & AIMS With the increase in patients at risk of advanced liver disease due to the obesity epidemic, there will be a need for simple screening tools for advanced liver fibrosis. Soluble suppression of tumorigenicity 2 (sST2) is a serum biomarker for fibrotic processes. The aim of this study was to evaluate sST2 as marker for liver fibrosis in patients successfully treated for chronic hepatitis C. METHODS 424 patients from the Swiss Hepatitis C Cohort Study were screened for inclusion in this post-hoc cohort study. Inclusion criteria were sustained virological response (SVR), available elastography (VCTE) and serum samples for biomarker analysis before and after treatment. For the validation of sST2, values were compared to VCTE, FIB-4 and APRI using Spearman's correlation and AUROC analyses. RESULTS Data of 164 subjects were finally analyzed. Median sST2 values slightly increased with VCTE-derived fibrosis stages and remained stable after reaching SVR within the respective fibrosis stage, suggesting that sST2 is not influenced by liver inflammation. However, correlation of sST2 pre- and post-treatment with VCTE was fair (Spearman's rho = 0.39 and rho = 0.36). The area under the curve (AUROC) for sST2 in detecting VCTE-defined F4 fibrosis (vs. F0-F3) before therapy was 0.74 (95%CI 0.65-0.83), and 0.67(95%CI 0.56-0.78) for the discrimination of F3/F4 fibrosis vs. F0-F2. Adding sST2 to either APRI or FIB-4, respectively, increased diagnostic performance of both tests. CONCLUSIONS sST2 can potentially identify patients with advanced fibrosis as a single serum marker and in combination with APRI and FIB-4.
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Affiliation(s)
- Florian F Hildenbrand
- Division of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091, Zurich, Switzerland
- Division of Gastroenterology and Hepatology, Stadtspital Zurich, Zurich, Switzerland
| | - Barbara Illi
- Division of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091, Zurich, Switzerland
| | - Stefanie von Felten
- Department of Biostatistics, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - Jacqueline Bachofner
- Division of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091, Zurich, Switzerland
| | - Joanna Gawinecka
- Institute of Clinical Chemistry, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Arnold von Eckardstein
- Institute of Clinical Chemistry, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Beat Müllhaupt
- Division of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091, Zurich, Switzerland
| | | | - Sena Blümel
- Division of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091, Zurich, Switzerland.
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Lafci B, Hadjihambi A, Determann M, Konstantinou C, Freijo C, Herraiz JL, Blümel S, Pellerin L, Burton NC, Deán-Ben XL, Razansky D. Multimodal assessment of non-alcoholic fatty liver disease with transmission-reflection optoacoustic ultrasound. Theranostics 2023; 13:4217-4228. [PMID: 37554280 PMCID: PMC10405839 DOI: 10.7150/thno.78548] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 05/31/2023] [Indexed: 08/10/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is an umbrella term referring to a group of conditions associated to fat deposition and damage of liver tissue. Early detection of fat accumulation is essential to avoid progression of NAFLD to serious pathological stages such as liver cirrhosis and hepatocellular carcinoma. Methods: We exploited the unique capabilities of transmission-reflection optoacoustic ultrasound (TROPUS), which combines the advantages of optical and acoustic contrasts, for an early-stage multi-parametric assessment of NAFLD in mice. Results: The multispectral optoacoustic imaging allowed for spectroscopic differentiation of lipid content, as well as the bio-distributions of oxygenated and deoxygenated hemoglobin in liver tissues in vivo. The pulse-echo (reflection) ultrasound (US) imaging further provided a valuable anatomical reference whilst transmission US facilitated the mapping of speed of sound changes in lipid-rich regions, which was consistent with the presence of macrovesicular hepatic steatosis in the NAFLD livers examined with ex vivo histological staining. Conclusion: The proposed multimodal approach facilitates quantification of liver abnormalities at early stages using a variety of optical and acoustic contrasts, laying the ground for translating the TROPUS approach toward diagnosis and monitoring NAFLD in patients.
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Affiliation(s)
- Berkan Lafci
- Institute of Pharmacology and Toxicology and Institute for Biomedical Engineering, Faculty of Medicine, University of Zurich, Switzerland
- Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, ETH Zurich, Switzerland
| | - Anna Hadjihambi
- The Roger Williams Institute of Hepatology, Foundation for Liver Research, London, UK
- Faculty of Life Sciences and Medicine, King's College London
- Department of Biomedical Sciences, University of Lausanne, Lausanne, Switzerland
| | - Madita Determann
- Department of Gastroenterology and Hepatology, University Hospital Zurich and University of Zurich, Zurich, Switzerland
| | - Christos Konstantinou
- The Roger Williams Institute of Hepatology, Foundation for Liver Research, London, UK
- Faculty of Life Sciences and Medicine, King's College London
- Department of Biomedical Sciences, University of Lausanne, Lausanne, Switzerland
| | - Clara Freijo
- Nuclear Physics Group and IPARCOS, Complutense University of Madrid, Madrid, Spain
| | - Joaquin L. Herraiz
- Nuclear Physics Group and IPARCOS, Complutense University of Madrid, Madrid, Spain
- Health Research Institute of Hospital Clínico San Carlos (IdISSC), Madrid, Spain
| | - Sena Blümel
- Department of Gastroenterology and Hepatology, University Hospital Zurich and University of Zurich, Zurich, Switzerland
| | - Luc Pellerin
- Department of Biomedical Sciences, University of Lausanne, Lausanne, Switzerland
- Inserm U1313, Université et CHU de Poitiers, Poitiers, France
| | | | - Xosé Luís Deán-Ben
- Institute of Pharmacology and Toxicology and Institute for Biomedical Engineering, Faculty of Medicine, University of Zurich, Switzerland
- Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, ETH Zurich, Switzerland
| | - Daniel Razansky
- Institute of Pharmacology and Toxicology and Institute for Biomedical Engineering, Faculty of Medicine, University of Zurich, Switzerland
- Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, ETH Zurich, Switzerland
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Kovatsch A, Honcharova-Biletska H, Segna D, Steigmiller K, Blümel S, Deibel RA, Kühlewindt T, Leinenkugel G, Müller S, Furrer E, Schawkat K, Reiner CS, Weber A, Müllhaupt B, Scharl M, Gubler C, Jüngst C. Performance of two-dimensional shear wave elastography and transient elastography compared to liver biopsy for staging of liver fibrosis. Eur J Clin Invest 2023:e13980. [PMID: 36880934 DOI: 10.1111/eci.13980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 02/12/2023] [Accepted: 03/03/2023] [Indexed: 03/08/2023]
Abstract
BACKGROUND Staging of liver fibrosis traditionally relied on liver histology; however, transient elastography (TE) and more recently two-dimensional shear wave elastography (2D-SWE) evolved to noninvasive alternatives. Hence, we evaluated the diagnostic accuracy of 2D-SWE assessed by the Canon Aplio i800 ultrasound system using liver biopsy as reference and compared the performance to TE. METHODS In total, 108 adult patients with chronic liver disease undergoing liver biopsy, 2D-SWE and TE were enrolled prospectively at the University Hospital Zurich. Diagnostic accuracies were evaluated using the area under the receiver operating characteristic (AUROC) analysis, and optimal cut-off values by Youden's index. RESULTS Diagnostic accuracy of 2D-SWE was good for significant (≥F2; AUROC 85.2%, 95% confidence interval (95%CI):76.2-91.2%) as well as severe fibrosis (≥F3; AUROC 86.8%, 95%CI: 78.1-92.4%) and excellent for cirrhosis (AUROC 95.6%, 95%CI: 89.9-98.1%), compared to histology. TE performed equally well (significant fibrosis: 87.5%, 95%CI: 77.7-93.3%; severe fibrosis: 89.7%, 95%CI: 82.0-94.3%; cirrhosis: 96%, 95%CI: 90.4-98.4%), and accuracy was not statistically different to 2D-SWE. 2D-SWE optimal cut-off values were 6.5, 9.8 and 13.1 kPa for significant fibrosis, severe fibrosis and cirrhosis, respectively. CONCLUSIONS Performance of 2D-SWE was good to excellent and well comparable with TE, supporting the application of this 2D-SWE system in the diagnostic workup of chronic liver disease.
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Affiliation(s)
- Audrey Kovatsch
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | | | - Daniel Segna
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland.,Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Klaus Steigmiller
- Institute of Epidemiology, Biostatistics and Prevention, University of Zurich, Zurich, Switzerland
| | - Sena Blümel
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Rudolf A Deibel
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Tobias Kühlewindt
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Georg Leinenkugel
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Sandra Müller
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Eva Furrer
- Institute of Epidemiology, Biostatistics and Prevention, University of Zurich, Zurich, Switzerland
| | - Khoschy Schawkat
- Department of Radiology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA.,Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
| | - Cäcilia S Reiner
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
| | - Achim Weber
- Department of Pathology, University Hospital Zurich, Zurich, Switzerland
| | - Beat Müllhaupt
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Michael Scharl
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Christoph Gubler
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland.,Division of Gastroenterology &Hepatology, Triemli Hospital, Zurich, Switzerland
| | - Christoph Jüngst
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland.,Department of Medicine II, Saarland University Medical Center, Saarland University, Homburg, Germany
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Norero B, Siebenhuener A, Kössler T, Usdin N, Semela D, Stillhard R, Meyer-Herborn P, Bergamin I, Fritsch R, Kremer A, Blümel S, Hussung S, Schwacha-Eipper B. P-137 Efficacy and safety of atezolizumab plus bevacizumab in unresectable or advanced hepatocellular carcinoma: Real life data from 5 Swiss centers. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.227] [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: 11/24/2022] Open
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von Ulmenstein S, Bogdanovic S, Honcharova-Biletska H, Blümel S, Deibel AR, Segna D, Jüngst C, Weber A, Kuntzen T, Gubler C, Reiner CS. Assessment of hepatic fibrosis and inflammation with look-locker T1 mapping and magnetic resonance elastography with histopathology as reference standard. Abdom Radiol (NY) 2022; 47:3746-3757. [PMID: 36038643 PMCID: PMC9560941 DOI: 10.1007/s00261-022-03647-6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 08/04/2022] [Accepted: 08/08/2022] [Indexed: 01/18/2023]
Abstract
PURPOSE To compare the diagnostic performance of T1 mapping and MR elastography (MRE) for staging of hepatic fibrosis and grading inflammation with histopathology as standard of reference. METHODS 68 patients with various liver diseases undergoing liver biopsy for suspected fibrosis or with an established diagnosis of cirrhosis prospectively underwent look-locker inversion recovery T1 mapping and MRE. T1 relaxation time and liver stiffness (LS) were measured by two readers. Hepatic fibrosis and inflammation were histopathologically staged according to a standardized fibrosis (F0-F4) and inflammation (A0-A2) score. For statistical analysis, independent t test, and Mann-Whitney U test and ROC analysis were performed, the latter to determine the performance of T1 mapping and MRE for fibrosis staging and inflammation grading, as compared to histopathology. RESULTS Histopathological analysis diagnosed 9 patients with F0 (13.2%), 21 with F1 (30.9%), 11 with F2 (16.2%), 10 with F3 (14.7%), and 17 with F4 (25.0%). Both T1 mapping and MRE showed significantly higher values for patients with significant fibrosis (F0-1 vs. F2-4; T1 mapping p < 0.0001, MRE p < 0.0001) as well as for patients with severe fibrosis or cirrhosis (F0-2 vs. F3-4; T1 mapping p < 0.0001, MRE p < 0.0001). T1 values and MRE LS were significantly higher in patients with inflammation (A0 vs. A1-2, both p = 0.01). T1 mapping showed a tendency toward lower diagnostic performance without statistical significance for significant fibrosis (F2-4) (AUC 0.79 vs. 0.91, p = 0.06) and with a significant difference compared to MRE for severe fibrosis (F3-4) (AUC 0.79 vs. 0.94, p = 0.03). For both T1 mapping and MRE, diagnostic performance for diagnosing hepatic inflammation (A1-2) was low (AUC 0.72 vs. 0.71, respectively). CONCLUSION T1 mapping is able to diagnose hepatic fibrosis, however, with a tendency toward lower diagnostic performance compared to MRE and thus may be used as an alternative to MRE for diagnosing hepatic fibrosis, whenever MRE is not available or likely to fail due to intrinsic factors of the patient. Both T1 mapping and MRE are probably not sufficient as standalone methods to diagnose hepatic inflammation with relatively low diagnostic accuracy.
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Affiliation(s)
- Sophie von Ulmenstein
- Diagnostic and Interventional Radiology, University Hospital Zurich, Raemistrasse 100, 8091, Zurich, Switzerland
| | - Sanja Bogdanovic
- Diagnostic Radiology, Balgrist University Hospital, Zurich, Switzerland
| | | | - Sena Blümel
- Division of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Ansgar R Deibel
- Division of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Daniel Segna
- Division of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
- Department of Visceral Surgery and Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Christoph Jüngst
- Division of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Achim Weber
- Department of Pathology and Molecular Pathology, University Hospital Zurich, Zurich, Switzerland
| | - Thomas Kuntzen
- Gastroenterology and Hepatology, Kantonsspital Aarau, Aarau, Switzerland
| | - Christoph Gubler
- Gastroenterology and Hepatology, Stadtspital Triemli, Zurich, Switzerland
| | - Cäcilia S Reiner
- Diagnostic and Interventional Radiology, University Hospital Zurich, Raemistrasse 100, 8091, Zurich, Switzerland.
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Sabev M, Blümel S, Lang S, Gottier C, Weber A, Mertens J, Müllhaupt B, Scharl M, Spalinger MR. Protein Tyrosine Phosphatase Nonreceptor Type 2 Expression Does Not Correlate with Viral Load or Response to Direct-Acting Antiviral Therapy in Hepatitis C Virus Infections-Infected Patients. Digestion 2021; 102:453-461. [PMID: 32074607 DOI: 10.1159/000505645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 12/28/2019] [Indexed: 02/04/2023]
Abstract
BACKGROUND/AIMS The hepatitis C virus nonstructural 3/4A protease has been shown to cleave protein tyrosine phosphatase nonreceptor type 2 (PTPN2, also known as T cell protein tyrosine phosphatase), thereby inducing a shift from a Th1 toward a nonantiviral Th2 immunity. Ribavirin therapy reverses these effects and supports direct-acting antiviral (DAA) therapy as an immunomodulatory compound and ultimately improves the response to DAA therapy. Here we aimed to assess whether intrahepatic levels of PTPN2 might be used as a clinical prognostic marker for the response to DAA therapy. METHODS Liver biopsies from hepatitis C virus-infected patients with and without cirrhosis were immunohistochemically stained for PTPN2 and scored for staining intensity as well as percentage of hepatocytes positive for nuclear PTPN2 localization. PTPN2 scores were correlated to sustained virologic response after DAA therapy, viral load, serum levels of alanine aminotransferase, aspartate aminotransferase, gamma-glutamyl transferase (GGT), and the Model for End-Stage Liver Disease (MELD) score at the time of liver biopsy. RESULTS We did not detect a difference in intrahepatic PTPN2 levels between responders with cirrhosis, responders without cirrhosis, and nonresponders to DAA therapy. There was no correlation between intrahepatic PTPN2 levels and viral load or clinical markers such as liver transaminases, GGT, or the MELD score. CONCLUSION Intrahepatic PTPN2 levels assessed via IHC staining do not represent a clinical prognostic marker for the response to DAA therapy.
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Affiliation(s)
- Max Sabev
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Sena Blümel
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Silvia Lang
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Claudia Gottier
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Achim Weber
- Department of Pathology, University Hospital Zurich, Zurich, Switzerland
| | - Joachim Mertens
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Beat Müllhaupt
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
| | - Michael Scharl
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland.,Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland
| | - Marianne R Spalinger
- Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland,
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Reinhold I, Blümel S, Schreiner J, Boyman O, Bögeholz J, Cheetham M, Rogler G, Biedermann L, Scharl M. Clinical Relevance of Anti-TNF Antibody Trough Levels and Anti-Drug Antibodies in Treating Inflammatory Bowel Disease Patients. Inflamm Intest Dis 2020; 6:38-47. [PMID: 33850838 DOI: 10.1159/000511296] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 08/31/2020] [Indexed: 12/16/2022] Open
Abstract
Background and Aims The majority of patients treated with anti-tumor necrosis factor (TNF) therapy develop anti-drug antibodies (ADAs), which might result in loss of treatment efficacy. Strict guidelines on measuring trough levels (TLs) and ADA in clinical routine do not exist. To provide real-world data, we took advantage of our tertiary inflammatory bowel disease (IBD) center patient cohort and determined indicators for therapeutic drug monitoring (TDM) and actual consequences in patient care. Methods We retrospectively collected clinical data of 104 IBD patients treated with infliximab or adalimumab in our IBD clinic. Patients with TL and ADA measurements between June 2015 and February 2018 were included. Results The main reason for determining TL was increased clinical disease. Subtherapeutic TLs were found in 33 patients, therapeutic TLs in 33 patients, and supratherapeutic TLs in 38 patients. Adjustments in anti-TNF therapy occurred more frequently (p = 0.01) in patients with subtherapeutic TL (24 of 33 patients; 73%) as compared to patients with therapeutic and supratherapeutic TLs (26 of 71 patients; 37%). No correlation could be found between TL and disease activity (p = 0.16). Presence of ADA was found in 16 patients, correlated with the development of infusion reactions (OR: 10.6, RR: 5.4, CI: 2.9-38.6), and was associated with subtherapeutic TL in 15 patients (93.8%). Treatment adaptations were based on TL and/or ADA presence in 36 of 63 patients. Conclusions TDM showed significant treatment adaptations in patients with subtherapeutic TL. Conversely, in patients with therapeutic and supratherapeutic TLs, reasons for adaptations were based on considerations other than TL, such as clinical disease activity. Further studies should focus on decision-making in patients presenting with supratherapeutic TL in remission.
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Affiliation(s)
- Ilana Reinhold
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.,Department of Internal Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Sena Blümel
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Jens Schreiner
- Department of Immunology, University Hospital Zurich, Zurich, Switzerland
| | - Onur Boyman
- Department of Immunology, University Hospital Zurich, Zurich, Switzerland.,Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Jan Bögeholz
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.,Department of Internal Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Marcus Cheetham
- Department of Internal Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Gerhard Rogler
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.,Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Luc Biedermann
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Michael Scharl
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
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Ditrich F, Blümel S, Biedermann L, Fournier N, Rossel JB, Ellinghaus D, Franke A, Stange EF, Rogler G, Scharl M. Genetic risk factors predict disease progression in Crohn's disease patients of the Swiss inflammatory bowel disease cohort. Therap Adv Gastroenterol 2020; 13:1756284820959252. [PMID: 33281934 PMCID: PMC7686597 DOI: 10.1177/1756284820959252] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 08/24/2020] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Crohn's disease (CD) may progress from an inflammatory to a stricturing or penetrating disease phenotype. The aim of our study was to identify single nucleotide polymorphisms (SNPs) that predict disease progression in patients of the Swiss IBD Cohort Study (SIBDCS). METHODS We applied a multi-state Markov model for progression behavior of CD with three behavioral states according to the Montreal classification. The model considered transition from B1 to B2/B3 or from B2 to B3 stage. Model dynamics were summarized with transition intensities by including the effect of SNPs and calculating transition intensities for each SNP. RESULTS We included 1276 CD patients [669 (52.4%) B1, 248 (19.4%) B2, 359 (28.1%) B3 patients] with a median follow-up of 6.8 (interquartile range = 3.6-9.1; range 0-11.6) years. Probability for a B1 patient to develop a stenosis (B1 to B2, q = 0.033) was twice as much as compared to developing a penetrating complication (B3) during the disease course. In contrast, the probability of entering B3 stage was similar regardless of whether antecedent stricture was present (B2 to B3, q = 0.016) or not (B1 to B3, q = 0.016). We identified SNPs within the gene loci encoding ZMIZ1, LOC105373831 and KSR1 as carrying the highest risk for progression to B3, while the presence of SNPs within gene loci TNFSF15 and CEBPB-PTPN1 protected from progression to B2 or B3. CONCLUSION We identified new genetic risk factors that can predict disease course in CD patients. A closer understanding on the functional impact of these genetic variations might improve our treatment options finally to prevent disease progression in CD patients.
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Affiliation(s)
- Felicitas Ditrich
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland,Department of Internal Medicine, Hospital Zollikerberg, Zollikerberg, Switzerland
| | - Sena Blümel
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Luc Biedermann
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Nicolas Fournier
- Center for Primary Care and Public Health (Unisanté), University of Lausanne, Lausanne, VD, Switzerland
| | - Jean-Benoit Rossel
- Center for Primary Care and Public Health (Unisanté), University of Lausanne, Lausanne, VD, Switzerland
| | - David Ellinghaus
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, University Hospital Schleswig Holstein, Kiel, Germany
| | - Andre Franke
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, University Hospital Schleswig Holstein, Kiel, Germany
| | - Eduard F. Stange
- Department of Internal Medicine I, University Hospital Tübingen, Tübingen, Germany
| | - Gerhard Rogler
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
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Berrut S, Blümel S, Erath A. [Examples of migrant-related health education. Experiences in the development of materials by the German Federal Centre of Health Education]. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2006; 49:898-902. [PMID: 16927033 DOI: 10.1007/s00103-006-0024-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Migrants in Germany are a very heterogeneous population. This has to be taken into account when developing and distributing materials. Linguistic and cultural barriers lead to the conclusion that personal communication is the best way to approach some of the migrant groups--especially in sensitive fields like HIV and other sexually transmitted infections. The German Federal Centre of Health Education (BZgA) supports multipliers with special material for prevention and counselling. New methods for translation and distribution were developed for a family planning brochure in Turkish. Furthermore, a newsletter provides a forum for exchange of information and experiences among those working in the field of migration and health.
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Affiliation(s)
- S Berrut
- Bundeszentrale für gesundheitliche Aufklärung, Köln, BRD.
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Blümel S, Stolz A. Cloning and characterization of the gene coding for the aerobic azoreductase from Pigmentiphaga kullae K24. Appl Microbiol Biotechnol 2003; 62:186-90. [PMID: 12719939 DOI: 10.1007/s00253-003-1316-5] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.9] [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: 10/24/2002] [Revised: 03/11/2003] [Accepted: 03/11/2003] [Indexed: 11/30/2022]
Abstract
The gene coding for an aerobic azoreductase was cloned from Pigmentiphaga kullae K24, which is able to grow with the carboxylated azo compound 1-(4'-carboxyphenylazo)-4-naphthol (carboxy-Orange I) as sole source of carbon and energy. The gene encoded a protein with a molecular weight of 20,557 Da, with a conserved putative NAD(P)H-binding site in the amino-terminal region. The deduced amino acid sequence showed no further significant sequence homologies to previously studied aerobic azoreductases. The azoreductase was heterologously expressed in Escherichia coli and shown to convert the sulfonated azo dye Orange I and furthermore Magneson II [4-(4-nitrophenylazo)-1-naphthol].
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Affiliation(s)
- S Blümel
- Institut für Mikrobiologie der Universität Stuttgart, Allmandring 31, 70569, Stuttgart, Germany
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Blümel S, Busse HJ, Stolz A, Kämpfer P. Xenophilus azovorans gen. nov., sp. nov., a soil bacterium that is able to degrade azo dyes of the Orange II type. Int J Syst Evol Microbiol 2001; 51:1831-1837. [PMID: 11594616 DOI: 10.1099/00207713-51-5-1831] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The taxonomy of strain KF46FT, which was isolated previously after an aerobic enrichment with the azo compound 1-(4'-carboxyphenylazo)-2-naphthol as the sole source of energy and carbon, was investigated by a polyphasic approach. The organism contained a quinone system with ubiquinone Q-8 and 2-hydroxyputrescine and putrescine as the major polyamines, suggesting that strain KF46FT belonged to the beta-subclass of the Proteobacteria. The polar lipid profile consisted mainly of phosphatidylethanolamine and minor amounts of phosphatidylglycerol and diphosphatidylglycerol. Sequencing of the 16S rRNA gene supported its placement in the family Comamonadaceae, but the sequence similarities to the most closely related species of the genera Hydrogenophaga, Acidovorax, Comamonas and Xylophilus were only in the range 95.0 to 96.1%. Different methods for the construction of phylogenetic trees showed the separate position of strain KF46FT 'between' the genera Hydrogenophaga, Variovorax, Comamonas and Xylophilus. Analysis of the fatty acids revealed an unusual profile, with the presence of 8:0 3-OH, 10:0 3-OH, 16:1 2-OH, 16:0 2-OH and 18:1 2-OH in addition to 17:0 cyclo, which is unique among the previously described genera of the family Comamonadaceae. Thus, a new taxon is proposed for strain KF46FT, with the name Xenophilus azovorans gen. nov., sp. nov.
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Blümel S, Mark B, Busse HJ, Kämpfer P, Stolz A. Pigmentiphaga kullae gen. nov., sp. nov., a novel member of the family Alcaligenaceae with the ability to decolorize azo dyes aerobically. Int J Syst Evol Microbiol 2001; 51:1867-1871. [PMID: 11594620 DOI: 10.1099/00207713-51-5-1867] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The taxonomic position of Pseudomonas strain K24, which was isolated previously after an aerobic enrichment with the azo compound 1-(4'-carboxyphenylazo)-4-naphthol as the sole source of carbon and energy, was investigated. The detection of a quinone system with ubiquinone Q-8 as the predominant compound and a polyamine pattern with putrescine and 2-hydroxyputrescine as the major polyamines present suggested that strain K24T belongs to the beta-subclass of the Proteobacteria. This was supported by sequencing the 16S rRNA gene, which demonstrated about 95-96% sequence similarity to different species of the genera Achromobacter, Alcaligenes and Bordetella. This suggested that strain K24T is a member of the family Alcaligenaceae. The G+C content of the DNA was 68.5 mol %. Different methods for the construction of phylogenetic dendrograms placed strain K24T separate from the genera Alcaligenes, Achromobacter and Bordetella. Analysis of the fatty acids demonstrated the presence of 10:0 3-OH and high concentrations of summed feature 7 (18:1omega7c, 18:1omega9t and/or 18:1omega12t) and 19:0 cycloomega8c, which is unique among previously described species of the genera Alcaligenes, Achromobacter and Bordetella. On the basis of the low 16S rRNA sequence similarities, the composition of the fatty acid profile and unique phenotypic properties, a new genus and species is proposed for strain K24T with the name Pigmentiphaga kullae gen. nov., sp. nov.
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Walzer A, Blümel S, Schausberger P. Population dynamics of interacting predatory mites, Phytoseiulus persimilis and Neoseiulus californicus, held on detached bean leaves. Exp Appl Acarol 2001; 25:731-743. [PMID: 12206584 DOI: 10.1023/a:1016332129137] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The success of combined release of the predatory mites Phytoseiulus persimilis and Neoseiulus californicus in suppression of spider mites may be related to the effects of the interactions between the two predators on their population dynamics. We studied population growth and persistence of the specialist P persimilis and the generalist N. californicus reared singly versus reared in combination after simultaneous and successive predator introductions on detached bean leaf arenas with abundant prey, Tetranychus urticae. and with diminishing prey. When reared singly with abundant prey, either predator population persisted at high densities to the end of the experiment. In every predator combination system with abundant prey and various initial predator:predator ratios N. californicus displaced P persimilis. When held singly with diminishing prey, the population of P. persimilis grew initially faster than the population of N. californicus but both species reached similar population peaks. Irrespective whether reared singly or in combination. N. californicus persisted three to five times longer after prey depletion than did P. persimilis. Regarding the crucial interactions in the predator combination systems, we conclude that intraguild predation was a stronger force than food competition and finally resulted in the displacement of P. persimilis. Previous studies showed that intraguild predation between the specialist P. persimilis and the generalist N. californicus is strongly asymmetric favoring the generalist. We discuss the implications of potential interactions between P. persimilis and N. californicus to biological control of spider mites.
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Affiliation(s)
- A Walzer
- Department of Horticulture, Institute of Horticulture and Fruit Growing, University of Agricultural Sciences, Vienna, Austria.
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Abstract
The taxonomic status of a gram-negative, oxidase positive rod (strain S1) able to degrade 4-aminobenzenesulfonate was studied using a polyphasic approach. Chemotaxonomic investigations of quinones and polar lipids established the allocation of this strain to the beta-subclass of the Proteobacteria and revealed similarities to Hydrogenophaga palleronii. 16S rRNA sequence comparisons demonstrated that this strain clusters phylogenetically with H. palleronii and H. taeniospiralis, but clearly represents a new species. The fatty acid patterns and substrate utilization profile displayed similarity to the characteristics of the four validly published species of Hydrogenophaga, although clear differentiating characters were also observed. No close similarities between the type strains of H. palleronii and H. taeniospiralis were detected in hybridization experiments with the genomic DNAs. On basis of these results, the new species Hydrogenophaga intermedia sp. nov. is proposed, with the type strain S1T (= DSM 5680).
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Affiliation(s)
- M Contzen
- Institut für Mikrobiologie, Universität Stuttgart, Germany
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Blümel S, Contzen M, Lutz M, Stolz A, Knackmuss HJ. Isolation of a bacterial strain with the ability to utilize the sulfonated azo compound 4-carboxy-4'-sulfoazobenzene as the sole source of carbon and energy. Appl Environ Microbiol 1998; 64:2315-7. [PMID: 9603860 PMCID: PMC106324 DOI: 10.1128/aem.64.6.2315-2317.1998] [Citation(s) in RCA: 60] [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] [Indexed: 02/07/2023] Open
Abstract
A bacterial strain (strain S5) which grows aerobically with the sulfonated azo compound 4-carboxy-4'-sulfoazobenzene as the sole source of carbon and energy was isolated. This strain was obtained by continuous adaptation of "Hydrogenophaga palleronii" S1, which has the ability to grow aerobically with 4-aminobenzenesulfonate. Strain S5 probably cleaves 4-carboxy-4'-sulfoazobenzene reductively under aerobic conditions to 4-aminobenzoate and 4-aminobenzene-sulfonate, which are mineralized by previously established degradation pathways.
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Affiliation(s)
- S Blümel
- Institut für Mikrobiologie der Universität Stuttgart, 70569 Stuttgart, Germany
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