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Eiseler K, Neppl L, Schmidt AW, Rauscher B, Ewers M, Masson E, Chen JM, Férec C, Rebours V, Grammatikopoulos T, Foskett P, Greenhalf W, Halloran C, Neoptolemos J, Haack TB, Ossowski S, Sturm M, Rosendahl J, Laumen H, Witt H. Genetic and functional analysis of chymotrypsin-like protease (CTRL) in chronic pancreatitis. Pancreatology 2023; 23:957-963. [PMID: 37949771 DOI: 10.1016/j.pan.2023.11.002] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/30/2023] [Accepted: 11/01/2023] [Indexed: 11/12/2023]
Abstract
BACKGROUND Genetic predisposition is crucial in the pathogenesis of early-onset chronic pancreatitis (CP). So far, several genetic alterations have been identified as risk factors, predominantly in genes encoding digestive enzymes. However, many early-onset CP cases have no identified underlying cause. Chymotrypsins are a family of serine proteases that can cleave trypsinogen and lead to its degradation. Because genetic alterations in the chymotrypsins CTRC, CTRB1, and CTRB2 are associated with CP, we genetically and functionally investigated chymotrypsin-like protease (CTRL) as a potential risk factor. METHODS We screened 1005 non-alcoholic CP patients and 1594 controls for CTRL variants by exome sequencing. We performed Western blots and activity assays to analyse secretion and proteolytic activity. We measured BiP mRNA expression to investigate the potential impact of identified alterations on endoplasmic reticulum (ER) stress. RESULTS We identified 13 heterozygous non-synonymous CTRL variants: five exclusively in patients and three only in controls. Functionality was unchanged in 6/13 variants. Four alterations showed normal secretion but reduced (p.G20S, p.G56S, p.G61S) or abolished (p.S208F) activity. Another three variants (p.C201Y, p.G215R and p.C220G) were not secreted and already showed reduced or no activity intracellularly. However, intracellular retention did not lead to ER stress. CONCLUSION We identified several CTRL variants, some showing potent effects on protease function and secretion. We observed these effects in variants found in patients and controls, and CTRL loss-of-function variants were not significantly more common in patients than controls. Therefore, CTRL is unlikely to play a relevant role in the development of CP.
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Affiliation(s)
- Katharina Eiseler
- Paediatric Nutritional Medicine, Else Kröner Fresenius Center for Nutritional Medicine (EKFZ), Technical University of Munich (TUM), Freising, Germany
| | - Lea Neppl
- Paediatric Nutritional Medicine, Else Kröner Fresenius Center for Nutritional Medicine (EKFZ), Technical University of Munich (TUM), Freising, Germany
| | - Andreas W Schmidt
- Paediatric Nutritional Medicine, Else Kröner Fresenius Center for Nutritional Medicine (EKFZ), Technical University of Munich (TUM), Freising, Germany; Department of Internal Medicine I, Martin Luther University (MLU), Halle (Saale), Germany; Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Beate Rauscher
- Paediatric Nutritional Medicine, Else Kröner Fresenius Center for Nutritional Medicine (EKFZ), Technical University of Munich (TUM), Freising, Germany
| | - Maren Ewers
- Paediatric Nutritional Medicine, Else Kröner Fresenius Center for Nutritional Medicine (EKFZ), Technical University of Munich (TUM), Freising, Germany
| | - Emmanuelle Masson
- Univ Brest, Inserm, EFS, UMR 1078, GGB, F-29200, Brest, France; Service de Génétique Médicale et de Biologie de la Reproduction, CHRU Brest, F-29200, Brest, France
| | - Jian-Min Chen
- Univ Brest, Inserm, EFS, UMR 1078, GGB, F-29200, Brest, France
| | - Claude Férec
- Univ Brest, Inserm, EFS, UMR 1078, GGB, F-29200, Brest, France
| | - Vinciane Rebours
- Pancreatology and Digestive Oncology Department, Beaujon Hospital, APHP - Clichy, Université Paris Cité, Paris, France
| | - Tassos Grammatikopoulos
- Paediatric Liver, GI & Nutrition Centre and MowatLabs, King's College Hospital NHS Foundation Trust, London, UK; Institute of Liver Studies, King's College London, London, UK
| | - Pierre Foskett
- Institute of Liver Studies, King's College London, London, UK
| | - William Greenhalf
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK
| | - Christopher Halloran
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK
| | - John Neoptolemos
- Department of Surgery, University of Heidelberg, Heidelberg, Germany
| | - Tobias B Haack
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Stephan Ossowski
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Marc Sturm
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Jonas Rosendahl
- Department of Internal Medicine I, Martin Luther University (MLU), Halle (Saale), Germany
| | - Helmut Laumen
- Paediatric Nutritional Medicine, Else Kröner Fresenius Center for Nutritional Medicine (EKFZ), Technical University of Munich (TUM), Freising, Germany; Department of Internal Medicine I, Martin Luther University (MLU), Halle (Saale), Germany
| | - Heiko Witt
- Paediatric Nutritional Medicine, Else Kröner Fresenius Center for Nutritional Medicine (EKFZ), Technical University of Munich (TUM), Freising, Germany.
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2
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Kaune T, Griesmann H, Theuerkorn K, Hämmerle M, Laumen H, Krug S, Plumeier I, Kahl S, Junca H, Gustavo dos Anjos Borges L, Michl P, Pieper DH, Rosendahl J. Gender-specific changes of the gut microbiome correlate with tumor development in murine models of pancreatic cancer. iScience 2023; 26:106841. [PMID: 37255660 PMCID: PMC10225934 DOI: 10.1016/j.isci.2023.106841] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 02/14/2023] [Accepted: 05/04/2023] [Indexed: 06/01/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a devastating disease with a dismal outcome. To improve understanding of sequential microbiome changes during PDAC development we analyzed mouse models of pancreatic carcinogenesis (KC mice recapitulating pre-invasive PanIN formation, as well as KPC mice recapitulating invasive PDAC) during early tumor development and subsequent tumor progression. Diversity and community composition were analyzed depending on genotype, age, and gender. Both mouse models demonstrated concordant abundance changes of several genera influenced by one or more of the investigated factors. Abundance was significantly impacted by gender, highlighting the need to further elucidate the impact of gender differences. The findings underline the importance of the microbiome in PDAC development and indicate that microbiological screening of patients at risk and targeting the microbiome in PDAC development may be feasible in future.
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Affiliation(s)
- Tom Kaune
- Department of Internal Medicine I, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Heidi Griesmann
- Department of Internal Medicine I, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Katharina Theuerkorn
- Department of Internal Medicine I, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Monika Hämmerle
- Institute of Pathology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Helmut Laumen
- Department of Internal Medicine I, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Sebastian Krug
- Department of Internal Medicine I, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
- Klinik für Innere Medizin IV, Universitätsklinikum Heidelberg, Heidelberg, Germany
| | - Iris Plumeier
- Microbial Interactions and Processes Research Group, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Silke Kahl
- Microbial Interactions and Processes Research Group, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Howard Junca
- Microbial Interactions and Processes Research Group, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | | | - Patrick Michl
- Department of Internal Medicine I, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
- Klinik für Innere Medizin IV, Universitätsklinikum Heidelberg, Heidelberg, Germany
| | - Dietmar H. Pieper
- Microbial Interactions and Processes Research Group, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Jonas Rosendahl
- Department of Internal Medicine I, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
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3
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Tóth A, Demcsák A, Zankl F, Oracz G, Unger LS, Bugert P, Laumen H, Párniczky A, Hegyi P, Rosendahl J, Gambin T, Płoski R, Koziel D, Gluszek S, Lindgren F, Löhr JM, Sahin-Tóth M, Witt H, Rygiel AM, Ewers M, Hegyi E. Loss-of-function variant in chymotrypsin like elastase 3B (CELA3B) is associated with non-alcoholic chronic pancreatitis. Pancreatology 2022; 22:713-718. [PMID: 35773178 PMCID: PMC9474678 DOI: 10.1016/j.pan.2022.06.258] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 02/20/2022] [Revised: 05/20/2022] [Accepted: 06/19/2022] [Indexed: 12/11/2022]
Abstract
BACKGROUND Genetic alterations in digestive enzymes have been associated with chronic pancreatitis (CP). Recently, chymotrypsin like elastase 3B (CELA3B) emerged as a novel risk gene. Thus, we evaluated CELA3B in two European cohorts with CP. METHODS We analyzed all 8 CELA3B exons in 550 German non-alcoholic CP (NACP) patients and in 241 German controls by targeted DNA sequencing. In addition, we analyzed exons 6 and 7 by Sanger sequencing and the c.129+1G>A variant by melting curve analysis in 1078 further German controls. As replication cohort, we investigated up to 243 non-German European NACP patients and up to 1665 controls originating from Poland, Hungary, and Sweden. We assessed the cellular secretion and the elastase activity of recombinant CELA3B variants. RESULTS In the German discovery cohort, we detected a splice-site variant in intron 2, c.129+1G>A, in 9/550 (1.64%) CP patients and in 5/1319 (0.38%) controls (P=0.007, OR=4.4, 95% CI=1.5-13.0). In the European replication cohort, this variant was also enriched in patients (9/178 [5.06%]) versus controls (13/1247 [1.04%]) (P=0.001, OR=5.1, 95% CI=2.1-12.0). We did not find the two previously reported codon 90 variants, p.R90C and p.R90L. CONCLUSIONS Our data indicate that CELA3B is a susceptibility gene for CP. In contrast to previous reports suggesting that increased CELA3B activity is associated with CP risk, the splice-site variant identified here is predicted to cause diminished CELA3B expression. How reduced CELA3B function predisposes to pancreatitis remains to be elucidated.
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Affiliation(s)
- Andrea Tóth
- Pediatric Nutritional Medicine & Else Kröner-Fresenius-Centre for Nutritional Medicine (EKFZ), Technical University Munich (TUM), Freising, Germany
| | - Alexandra Demcsák
- Center for Exocrine Disorders, Department of Molecular and Cell Biology, Boston University, Henry M. Goldman School of Dental Medicine, Boston, MA, 02118, United States; Department of Surgery, University of California Los Angeles, Los Angeles, CA, 90095, United States
| | - Florence Zankl
- Pediatric Nutritional Medicine & Else Kröner-Fresenius-Centre for Nutritional Medicine (EKFZ), Technical University Munich (TUM), Freising, Germany
| | - Grzegorz Oracz
- Department of Gastroenterology, Hepatology, Feeding Disorders and Pediatrics, The Children's Memorial Health Institute, Warsaw, Poland
| | - Lara Sophie Unger
- Pediatric Nutritional Medicine & Else Kröner-Fresenius-Centre for Nutritional Medicine (EKFZ), Technical University Munich (TUM), Freising, Germany
| | - Peter Bugert
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, Heidelberg University, German Red Cross Blood Service of Baden-Württemberg, Mannheim, Germany
| | - Helmut Laumen
- Pediatric Nutritional Medicine & Else Kröner-Fresenius-Centre for Nutritional Medicine (EKFZ), Technical University Munich (TUM), Freising, Germany; Department of Internal Medicine I, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Andrea Párniczky
- Heim Pál National Pediatric Institute, Budapest, Hungary; Institute for Translational Medicine, Medical School, Szentágothai Research Center, University of Pécs, Pécs, Hungary; Center for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Péter Hegyi
- Institute for Translational Medicine, Medical School, Szentágothai Research Center, University of Pécs, Pécs, Hungary; Center for Translational Medicine, Semmelweis University, Budapest, Hungary; Division of Pancreatic Diseases, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Jonas Rosendahl
- Department of Internal Medicine I, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Tomasz Gambin
- Department of Medical Genetics, Institute of Mother and Child, Warsaw, Poland; Institute of Computer Science, Warsaw University of Technology, Warsaw, Poland
| | - Rafał Płoski
- Department of Medical Genetics, Medical University of Warsaw, Warsaw, Poland
| | - Dorota Koziel
- Collegium Medicum, Jan Kochanowski University of Kielce, Poland
| | | | - Fredrik Lindgren
- Department of Pediatric, Karolinska University Hospital, Stockholm, Sweden
| | - J Matthias Löhr
- Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Miklós Sahin-Tóth
- Center for Exocrine Disorders, Department of Molecular and Cell Biology, Boston University, Henry M. Goldman School of Dental Medicine, Boston, MA, 02118, United States; Department of Surgery, University of California Los Angeles, Los Angeles, CA, 90095, United States
| | - Heiko Witt
- Pediatric Nutritional Medicine & Else Kröner-Fresenius-Centre for Nutritional Medicine (EKFZ), Technical University Munich (TUM), Freising, Germany
| | | | - Maren Ewers
- Pediatric Nutritional Medicine & Else Kröner-Fresenius-Centre for Nutritional Medicine (EKFZ), Technical University Munich (TUM), Freising, Germany.
| | - Eszter Hegyi
- Center for Exocrine Disorders, Department of Molecular and Cell Biology, Boston University, Henry M. Goldman School of Dental Medicine, Boston, MA, 02118, United States; Institute for Translational Medicine, Medical School, Szentágothai Research Center, University of Pécs, Pécs, Hungary.
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4
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Rygiel AM, Unger LS, Sörgel FL, Masson E, Matsumoto R, Ewers M, Chen JM, Bugert P, Buscail L, Gambin T, Oracz G, Winiewska-Szajewska M, Mianowska A, Poznanski J, Kosińska J, Stawinski P, Płoski R, Koziel D, Gluszek S, Laumen H, Lindgren F, Löhr JM, Orekhova A, Rebours V, Rosendahl J, Párniczky A, Hegyi P, Sasaki A, Kataoka F, Tanaka Y, Hamada S, Sahin-Tóth M, Hegyi E, Férec C, Masamune A, Witt H. Variants in the pancreatic CUB and zona pellucida-like domains 1 (CUZD1) gene in early-onset chronic pancreatitis - A possible new susceptibility gene. Pancreatology 2022; 22:564-571. [PMID: 35589511 PMCID: PMC9250292 DOI: 10.1016/j.pan.2022.04.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 09/15/2021] [Revised: 03/31/2022] [Accepted: 04/28/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Non-alcoholic chronic pancreatitis (NACP) frequently develops in the setting of genetic susceptibility associated with alterations in genes that are highly expressed in the pancreas. However, the genetic basis of NACP remains unresolved in a significant number of patients warranting a search for further risk genes. DESIGN We analyzed CUZD1, which encodes the CUB and zona pellucida-like domains 1 protein that is found in high levels in pancreatic acinar cells. We sequenced the coding region in 1163 European patients and 2018 European controls. In addition, we analyzed 297 patients and 1070 controls from Japan. We analyzed secretion of wild-type and mutant CUZD1 from transfected cells using Western blotting. RESULTS In the European cohort, we detected 30 non-synonymous variants. Using different prediction tools (SIFT, CADD, PROVEAN, PredictSNP) or the combination of these tools, we found accumulation of predicted deleterious variants in patients (p-value range 0.002-0.013; OR range 3.1-5.2). No association was found in the Japanese cohort, in which 13 non-synonymous variants were detected. Functional studies revealed >50% reduced secretion of 7 variants, however, these variants were not significantly enriched in European CP patients. CONCLUSION Our data indicate that CUZD1 might be a novel susceptibility gene for NACP. How these variants predispose to pancreatitis remains to be elucidated.
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Affiliation(s)
| | - Lara Sophie Unger
- Center for Exocrine Disorders, Department of Molecular and Cell Biology, Boston University, Henry M. Goldman School of Dental Medicine, Boston, MA, 02118, United States; Pediatric Nutritional Medicine & Else Kröner-Fresenius-Centre for Nutritional Medicine EKFZ, Technical University Munich TUM, Freising, Germany
| | - Franziska Lena Sörgel
- Pediatric Nutritional Medicine & Else Kröner-Fresenius-Centre for Nutritional Medicine EKFZ, Technical University Munich TUM, Freising, Germany
| | - Emmanuelle Masson
- Univ Brest, Inserm, EFS, UMR 1078, GGB, F-29200, Brest, France; Service de Génétique Médicale et de Biologie de la Reproduction, CHRU Brest, F-29200, Brest, France
| | - Ryotaro Matsumoto
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Maren Ewers
- Pediatric Nutritional Medicine & Else Kröner-Fresenius-Centre for Nutritional Medicine EKFZ, Technical University Munich TUM, Freising, Germany
| | - Jian-Min Chen
- Univ Brest, Inserm, EFS, UMR 1078, GGB, F-29200, Brest, France
| | - Peter Bugert
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, Heidelberg University, German Red Cross Blood Service of Baden-Württemberg, Mannheim, Germany
| | - Louis Buscail
- Department of Gastroenterology and Pancreatology, CHU Rangueil and University of Toulouse, Toulouse, France
| | - Tomasz Gambin
- Department of Medical Genetics, Institute of Mother and Child, Warsaw, Poland; Institute of Computer Science, Warsaw University of Technology, Warsaw, Poland
| | - Grzegorz Oracz
- Department of Gastroenterology, Hepatology, Feeding Disorders and Pediatrics, The Children's Memorial Health Institute, Warsaw, Poland
| | - Maria Winiewska-Szajewska
- Department of Biophysics, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Agnieszka Mianowska
- Department of Gastroenterology, Hepatology, Feeding Disorders and Pediatrics, The Children's Memorial Health Institute, Warsaw, Poland
| | - Jarosław Poznanski
- Department of Biophysics, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Joanna Kosińska
- Department of Medical Genetics, Medical University of Warsaw, Warsaw, Poland
| | - Piotr Stawinski
- Department of Medical Genetics, Medical University of Warsaw, Warsaw, Poland
| | - Rafał Płoski
- Department of Medical Genetics, Medical University of Warsaw, Warsaw, Poland
| | - Dorota Koziel
- Collegium Medicum, Jan Kochanowski University of Kielce, Poland
| | | | - Helmut Laumen
- Pediatric Nutritional Medicine & Else Kröner-Fresenius-Centre for Nutritional Medicine EKFZ, Technical University Munich TUM, Freising, Germany; Department of Internal Medicine I, Martin Luther University, Halle, Germany
| | - Fredrik Lindgren
- Department of Pediatric, Karolinska University Hospital, Stockholm, Sweden
| | - J Matthias Löhr
- Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Anna Orekhova
- Center for Exocrine Disorders, Department of Molecular and Cell Biology, Boston University, Henry M. Goldman School of Dental Medicine, Boston, MA, 02118, United States
| | - Vinciane Rebours
- Pancreatology and Digestive Oncology Department, Beaujon Hospital, Clichy, APHP, Université de Paris, Paris, France
| | - Jonas Rosendahl
- Department of Internal Medicine I, Martin Luther University, Halle, Germany
| | - Andrea Párniczky
- Heim Pál National Pediatric Institute, Budapest, Hungary; Institute for Translational Medicine, Medical School, University of Pécs, Pécs, Hungary; Center for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Péter Hegyi
- Institute for Translational Medicine, Medical School, University of Pécs, Pécs, Hungary; Division of Pancreatic Diseases, Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Akira Sasaki
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Fumiya Kataoka
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yu Tanaka
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shin Hamada
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Miklós Sahin-Tóth
- Center for Exocrine Disorders, Department of Molecular and Cell Biology, Boston University, Henry M. Goldman School of Dental Medicine, Boston, MA, 02118, United States; Department of Surgery, University of California Los Angeles, Los Angeles, CA, 90095, United States
| | - Eszter Hegyi
- Center for Exocrine Disorders, Department of Molecular and Cell Biology, Boston University, Henry M. Goldman School of Dental Medicine, Boston, MA, 02118, United States; Institute for Translational Medicine, Medical School, University of Pécs, Pécs, Hungary
| | - Claude Férec
- Univ Brest, Inserm, EFS, UMR 1078, GGB, F-29200, Brest, France; Service de Génétique Médicale et de Biologie de la Reproduction, CHRU Brest, F-29200, Brest, France
| | - Atsushi Masamune
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Heiko Witt
- Pediatric Nutritional Medicine & Else Kröner-Fresenius-Centre for Nutritional Medicine EKFZ, Technical University Munich TUM, Freising, Germany.
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Oracz G, Zaród M, Ewers M, Laumen H, Gambin T, Kamiński P, Grabowska I, Drożak A, Kwiatkowski S, Wertheim-Tysarowska K, Kołodziejczyk E, Domaszewicz A, Dorożko B, Kosińska J, Głuszek S, Kozieł D, Płoski R, Rosendahl J, Witt H, Drożak J, Rygiel AM. Loss of function TRPV6 variants are associated with chronic pancreatitis in nonalcoholic early-onset Polish and German patients. Pancreatology 2021; 21:1434-1442. [PMID: 34538581 DOI: 10.1016/j.pan.2021.09.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 05/14/2021] [Revised: 08/26/2021] [Accepted: 09/07/2021] [Indexed: 12/11/2022]
Abstract
PURPOSE Loss of function variants of the transient receptor potential cation channel, subfamily V, member 6 (TRPV6) have been recently associated with chronic pancreatitis (CP) in Japanese, German and French patients. Here, we investigated the association of TRPV6 variants with CP in independent European cohorts of early-onset CP patients from Poland and Germany. PATIENTS AND METHODS We enrolled 152 pediatric CP patients (median age 8.6 yrs) with no history of alcohol/smoking abuse and 472 controls from Poland as well as 157 nonalcoholic young CP patients (median age 20 yrs) and 750 controls from Germany. Coding regions of TRPV6 were screened by Sanger and next generation sequencing. Selected, potentially pathogenic TRPV6 variants were expressed in HEK293T cells and TRPV6 activity was analyzed using ratiometric Ca2+ measurements. RESULTS Overall, we identified 10 novel (3 nonsense and 7 missenses) TRPV6 variants in CP patients. TRPV6 p.V239SfsX53 nonsense variant and the variants showing significant decrease in intracellular Ca2+ concentration in HEK293T cells (p.R174X, p.L576R, p.R342Q), were significantly overrepresented in Polish patients as compared to controls (6/152, 3.9% vs. 0/358, 0%; P = 0,0007). Nonsense TRPV6 variants predicted as loss of function (p.V239SfsX53 and p.R624X) were also significantly overrepresented in German patients (3/157; 2.0% vs 0/750; 0%, P = 0.005). CONCLUSIONS We showed that TRPV6 loss of function variants are associated with elevated CP risk in early-onset Polish and German patients confirming that TRPV6 is a novel CP susceptibility gene.
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Affiliation(s)
- Grzegorz Oracz
- Department of Gastroenterology, Hepatology, Feeding Disorders and Pediatrics, The Children's Memorial Health Institute, Warsaw, Poland
| | - Michał Zaród
- Department of Metabolic Regulation, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Maren Ewers
- Pediatric Nutritional Medicine & Else Kröner-Fresenius-Centre for Nutritional Medicine (EKFZ), Technical University Munich (TUM), Munich, Germany
| | - Helmut Laumen
- Pediatric Nutritional Medicine & Else Kröner-Fresenius-Centre for Nutritional Medicine (EKFZ), Technical University Munich (TUM), Munich, Germany; Department of Internal Medicine I, Martin Luther University, Halle, Germany
| | - Tomasz Gambin
- Department of Medical Genetics, Institute of Mother and Child, Warsaw, Poland; Institute of Computer Science, Warsaw University of Technology, Warsaw, Poland
| | - Paweł Kamiński
- Department of Medical Genetics, Institute of Mother and Child, Warsaw, Poland
| | - Iwona Grabowska
- Department of Cytology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Anna Drożak
- Department of Molecular Plant Physiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Sebastian Kwiatkowski
- Department of Metabolic Regulation, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | | | - Elwira Kołodziejczyk
- Department of Gastroenterology, Hepatology, Feeding Disorders and Pediatrics, The Children's Memorial Health Institute, Warsaw, Poland
| | - Alicja Domaszewicz
- Department of Medical Genetics, Institute of Mother and Child, Warsaw, Poland
| | - Barbara Dorożko
- Department of Medical Genetics, Institute of Mother and Child, Warsaw, Poland
| | - Joanna Kosińska
- Department of Medical Genetics, Medical University of Warsaw, Warsaw, Poland
| | | | - Dorota Kozieł
- Collegium Medicum Jan Kochanowski University, Kielce, Poland
| | - Rafał Płoski
- Department of Medical Genetics, Medical University of Warsaw, Warsaw, Poland
| | - Jonas Rosendahl
- Department of Internal Medicine I, Martin Luther University, Halle, Germany
| | - Heiko Witt
- Pediatric Nutritional Medicine & Else Kröner-Fresenius-Centre for Nutritional Medicine (EKFZ), Technical University Munich (TUM), Munich, Germany
| | - Jakub Drożak
- Department of Metabolic Regulation, Faculty of Biology, University of Warsaw, Warsaw, Poland.
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6
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Seltsam K, Pentner C, Weigl F, Sutedjo S, Zimmer C, Beer S, Bugert P, Ewers M, Ruffert C, Michl P, Laumen H, Witt H, Rosendahl J. Sequencing of the complex CTRB1-CTRB2 locus in chronic pancreatitis. Pancreatology 2020; 20:1598-1603. [PMID: 33036922 DOI: 10.1016/j.pan.2020.09.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 06/25/2020] [Revised: 09/21/2020] [Accepted: 09/23/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND /Objectives: A recent Genome-wide Association Study (GWAS) in alcoholic chronic pancreatitis (ACP) identified a novel association with the CTRB1-CTRB2 (chymotrypsinogen B1, B2) locus, linked to a 16.6 kb inversion that was confirmed in non-alcoholic chronic pancreatitis (NACP). Moreover, recent findings on the function of CTRB1 and CTRB2 suggest a protective role in pancreatitis development. The aim of the present study was to investigate the CTRB1-CTRB2 locus for rare genetic variants associated with chronic pancreatitis (CP). METHODS We analyzed 134 patients with ACP and 203 patients with NACP and compared them to up to 258 healthy controls. Genotyping was performed with polymerase chain reaction, followed by Sanger sequencing of all exons and the exon-intron-boundaries of CTRB1 and CTRB2. Finally, in silico analyses of the identified variants were conducted. RESULTS None of the seven rare missense variants or the single 5'-UTR variant in CTRB1 and CTRB2 was associated with ACP or NACP. In silico analysis predicted that variant p. Trp5Leu in CTRB1 and variant c.-4C > T in CTRB2 might alter protein expression and variants p. Asp222His in CTRB1 and p. Ala247Thr in CTRB2 might affect protein function. However, all of these variants were also described in public databases. CONCLUSIONS The present study did not reveal an association of rare variants in CTRB1 and CTRB2 with ACP or NACP. Although rare missense variants were almost exclusively found in patients, only four variants were predicted to affect protein expression or function. Thus, a major influence of rare variants in the CTRB1-CTRB2 locus on CP development is unlikely.
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Affiliation(s)
- Katharina Seltsam
- Department of Internal Medicine I, Martin Luther University, Halle, Germany
| | - Carola Pentner
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, TUM School of Life Sciences, Technische Universität München (TUM), Freising, Germany
| | - Franziska Weigl
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, TUM School of Life Sciences, Technische Universität München (TUM), Freising, Germany
| | - Stella Sutedjo
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, TUM School of Life Sciences, Technische Universität München (TUM), Freising, Germany
| | - Constantin Zimmer
- Division of Gastroenterology, Medical Department II - Oncology, Gastroenterology, Hepatology, Pulmonology, Infectious Diseases, University of Leipzig Medical Center, Leipzig, Germany
| | - Sebastian Beer
- Division of Gastroenterology, Medical Department II - Oncology, Gastroenterology, Hepatology, Pulmonology, Infectious Diseases, University of Leipzig Medical Center, Leipzig, Germany
| | - Peter Bugert
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, Heidelberg University, German Red Cross Blood Service of Baden-Württemberg, Mannheim, Germany
| | - Maren Ewers
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, TUM School of Life Sciences, Technische Universität München (TUM), Freising, Germany
| | - Claudia Ruffert
- Department of Internal Medicine I, Martin Luther University, Halle, Germany
| | - Patrick Michl
- Department of Internal Medicine I, Martin Luther University, Halle, Germany
| | - Helmut Laumen
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, TUM School of Life Sciences, Technische Universität München (TUM), Freising, Germany
| | - Heiko Witt
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, TUM School of Life Sciences, Technische Universität München (TUM), Freising, Germany
| | - Jonas Rosendahl
- Department of Internal Medicine I, Martin Luther University, Halle, Germany.
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7
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Masamune A, Kotani H, Sörgel FL, Chen JM, Hamada S, Sakaguchi R, Masson E, Nakano E, Kakuta Y, Niihori T, Funayama R, Shirota M, Hirano T, Kawamoto T, Hosokoshi A, Kume K, Unger L, Ewers M, Laumen H, Bugert P, Mori MX, Tsvilovskyy V, Weißgerber P, Kriebs U, Fecher-Trost C, Freichel M, Diakopoulos KN, Berninger A, Lesina M, Ishii K, Itoi T, Ikeura T, Okazaki K, Kaune T, Rosendahl J, Nagasaki M, Uezono Y, Algül H, Nakayama K, Matsubara Y, Aoki Y, Férec C, Mori Y, Witt H, Shimosegawa T. Variants That Affect Function of Calcium Channel TRPV6 Are Associated With Early-Onset Chronic Pancreatitis. Gastroenterology 2020; 158:1626-1641.e8. [PMID: 31930989 DOI: 10.1053/j.gastro.2020.01.005] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [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: 05/15/2019] [Revised: 12/09/2019] [Accepted: 01/02/2020] [Indexed: 01/21/2023]
Abstract
BACKGROUND & AIMS Changes in pancreatic calcium levels affect secretion and might be involved in development of chronic pancreatitis (CP). We investigated the association of CP with the transient receptor potential cation channel subfamily V member 6 gene (TRPV6), which encodes a Ca2+-selective ion channel, in an international cohort of patients and in mice. METHODS We performed whole-exome DNA sequencing from a patient with idiopathic CP and from his parents, who did not have CP. We validated our findings by sequencing DNA from 300 patients with CP (not associated with alcohol consumption) and 1070 persons from the general population in Japan (control individuals). In replication studies, we sequenced DNA from patients with early-onset CP (20 years or younger) not associated with alcohol consumption from France (n = 470) and Germany (n = 410). We expressed TRPV6 variants in HEK293 cells and measured their activity using Ca2+ imaging assays. CP was induced by repeated injections of cerulein in TRPV6mut/mut mice. RESULTS We identified the variants c.629C>T (p.A210V) and c.970G>A (p.D324N) in TRPV6 in the index patient. Variants that affected function of the TRPV6 product were found in 13 of 300 patients (4.3%) and 1 of 1070 control individuals (0.1%) from Japan (odds ratio [OR], 48.4; 95% confidence interval [CI], 6.3-371.7; P = 2.4 × 10-8). Twelve of 124 patients (9.7%) with early-onset CP had such variants. In the replication set from Europe, 18 patients with CP (2.0%) carried variants that affected the function of the TRPV6 product compared with 0 control individuals (P = 6.2 × 10-8). Variants that did not affect the function of the TRPV6 product (p.I223T and p.D324N) were overrepresented in Japanese patients vs control individuals (OR, 10.9; 95% CI, 4.5-25.9; P = 7.4 × 10-9 for p.I223T and P = .01 for p.D324N), whereas the p.L299Q was overrepresented in European patients vs control individuals (OR, 3.0; 95% CI, 1.9-4.8; P = 1.2 × 10-5). TRPV6mut/mut mice given cerulein developed more severe pancreatitis than control mice, as shown by increased levels of pancreatic enzymes, histologic alterations, and pancreatic fibrosis. CONCLUSIONS We found that patients with early-onset CP not associated with alcohol consumption carry variants in TRPV6 that affect the function of its product, perhaps by altering Ca2+ balance in pancreatic cells. TRPV6 regulates Ca2+ homeostasis and pancreatic inflammation.
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Affiliation(s)
- Atsushi Masamune
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - Hiroshi Kotani
- Laboratory of Molecular Biology, Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Franziska Lena Sörgel
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin, Paediatric Nutritional Medicine, Technische Universität München, Freising, Germany
| | - Jian-Min Chen
- Inserm, Univ Brest, EFS, UMR 1078, GGB, Brest, France
| | - Shin Hamada
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Reiko Sakaguchi
- Laboratory of Molecular Biology, Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan; Institute for Integrated Cell-Material Sciences, Kyoto University, Kyoto, Japan
| | - Emmanuelle Masson
- Inserm, Univ Brest, EFS, UMR 1078, GGB, Brest, France; CHU Brest, Service de Génétique, Brest, France
| | - Eriko Nakano
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yoichi Kakuta
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tetsuya Niihori
- Department of Medical Genetics, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Ryo Funayama
- Division of Cell Proliferation, United Centers for Advanced Research and Translational Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Matsuyuki Shirota
- Division of Cell Proliferation, United Centers for Advanced Research and Translational Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tatsuya Hirano
- Laboratory of Molecular Biology, Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Tetsuya Kawamoto
- Laboratory of Molecular Biology, Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Atsuki Hosokoshi
- Laboratory of Molecular Biology, Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Kiyoshi Kume
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Lara Unger
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin, Paediatric Nutritional Medicine, Technische Universität München, Freising, Germany
| | - Maren Ewers
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin, Paediatric Nutritional Medicine, Technische Universität München, Freising, Germany
| | - Helmut Laumen
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin, Paediatric Nutritional Medicine, Technische Universität München, Freising, Germany
| | - Peter Bugert
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, Heidelberg University, German Red Cross Blood Service of Baden-Württemberg-Hessen, Mannheim, Germany
| | - Masayuki X Mori
- Laboratory of Molecular Biology, Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Volodymyr Tsvilovskyy
- Pharmakologisches Institut, Universität Heidelberg, Heidelberg, Germany; German Center for Cardiovascular Research, partner site Heidelberg, Germany
| | - Petra Weißgerber
- Experimentelle und Klinische Pharmakologie und Toxikologie, Universität des Saarlandes, Homburg, Germany
| | - Ulrich Kriebs
- Pharmakologisches Institut, Universität Heidelberg, Heidelberg, Germany; German Center for Cardiovascular Research, partner site Heidelberg, Germany
| | - Claudia Fecher-Trost
- Experimentelle und Klinische Pharmakologie und Toxikologie, Universität des Saarlandes, Homburg, Germany
| | - Marc Freichel
- Pharmakologisches Institut, Universität Heidelberg, Heidelberg, Germany; German Center for Cardiovascular Research, partner site Heidelberg, Germany
| | - Kalliope N Diakopoulos
- Mildred Scheel Chair of Tumor Metabolism and Comprehensive Cancer Center Munich at the Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Alexandra Berninger
- Mildred Scheel Chair of Tumor Metabolism and Comprehensive Cancer Center Munich at the Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Marina Lesina
- Mildred Scheel Chair of Tumor Metabolism and Comprehensive Cancer Center Munich at the Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Kentaro Ishii
- Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan
| | - Takao Itoi
- Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan
| | - Tsukasa Ikeura
- Department of Gastroenterology and Hepatology, Kansai Medical University, Hirakata, Japan
| | - Kazuichi Okazaki
- Department of Gastroenterology and Hepatology, Kansai Medical University, Hirakata, Japan
| | - Tom Kaune
- Department of Internal Medicine I, Martin Luther University, Halle (Saale), Germany
| | - Jonas Rosendahl
- Department of Internal Medicine I, Martin Luther University, Halle (Saale), Germany
| | - Masao Nagasaki
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | - Yasuhito Uezono
- Cancer Pathophysiology Division, National Cancer Center Research Institute, Tokyo, Japan
| | - Hana Algül
- Mildred Scheel Chair of Tumor Metabolism and Comprehensive Cancer Center Munich at the Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Keiko Nakayama
- Division of Cell Proliferation, United Centers for Advanced Research and Translational Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | | | - Yoko Aoki
- Department of Medical Genetics, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Claude Férec
- Inserm, Univ Brest, EFS, UMR 1078, GGB, Brest, France; CHU Brest, Service de Génétique, Brest, France
| | - Yasuo Mori
- Laboratory of Molecular Biology, Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Heiko Witt
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin, Paediatric Nutritional Medicine, Technische Universität München, Freising, Germany
| | - Tooru Shimosegawa
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
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8
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Matejka K, Stückler F, Salomon M, Ensenauer R, Reischl E, Hoerburger L, Grallert H, Kastenmüller G, Peters A, Daniel H, Krumsiek J, Theis FJ, Hauner H, Laumen H. Dynamic modelling of an ACADS genotype in fatty acid oxidation - Application of cellular models for the analysis of common genetic variants. PLoS One 2019; 14:e0216110. [PMID: 31120904 PMCID: PMC6532850 DOI: 10.1371/journal.pone.0216110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 04/15/2019] [Indexed: 11/19/2022] Open
Abstract
Background Genome-wide association studies of common diseases or metabolite quantitative traits often identify common variants of small effect size, which may contribute to phenotypes by modulation of gene expression. Thus, there is growing demand for cellular models enabling to assess the impact of gene regulatory variants with moderate effects on gene expression. Mitochondrial fatty acid oxidation is an important energy metabolism pathway. Common noncoding acyl-CoA dehydrogenase short chain (ACADS) gene variants are associated with plasma C4-acylcarnitine levels and allele-specific modulation of ACADS expression may contribute to the observed phenotype. Methods and findings We assessed ACADS expression and intracellular acylcarnitine levels in human lymphoblastoid cell lines (LCL) genotyped for a common ACADS variant associated with plasma C4-acylcarnitine and found a significant genotype-dependent decrease of ACADS mRNA and protein. Next, we modelled gradual decrease of ACADS expression using a tetracycline-regulated shRNA-knockdown of ACADS in Huh7 hepatocytes, a cell line with high fatty acid oxidation-(FAO)-capacity. Assessing acylcarnitine flux in both models, we found increased C4-acylcarnitine levels with decreased ACADS expression levels. Moreover, assessing time-dependent changes of acylcarnitine levels in shRNA-hepatocytes with altered ACADS expression levels revealed an unexpected effect on long- and medium-chain fatty acid intermediates. Conclusions Both, genotyped LCL and regulated shRNA-knockdown are valuable tools to model moderate, gradual gene-regulatory effects of common variants on cellular phenotypes. Decreasing ACADS expression levels modulate short and surprisingly also long/medium chain acylcarnitines, and may contribute to increased plasma acylcarnitine levels.
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Affiliation(s)
- Kerstin Matejka
- Chair of Nutritional Medicine, Else Kröner-Fresenius-Center for Nutritional Medicine, TUM School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
- ZIEL-Research Center for Nutrition and Food Sciences, TUM School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München, Neuherberg, Germany
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Technische Universität München, Freising-Weihenstephan, Germany
| | - Ferdinand Stückler
- Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany
| | | | - Regina Ensenauer
- Research Center, Dr. von Hauner Children’s Hospital, Ludwig-Maximilians-Universität München, München, Germany
- Experimental Pediatrics and Metabolism, Department of General Pediatrics, Neonatology and Pediatric Cardiology, University Children’s Hospital, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
- Institute of Child Nutrition, Max Rubner-Institut, Karlsruhe, Germany
| | - Eva Reischl
- Research Unit of Molecular Epidemiology, Helmholtz Zentrum München, Neuherberg, Germany
- Institute of Epidemiology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Lena Hoerburger
- Paediatric Nutritional Medicine, Else Kröner-Fresenius-Centre for Nutritional Medicine, TUM School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
| | - Harald Grallert
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München, Neuherberg, Germany
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Technische Universität München, Freising-Weihenstephan, Germany
- Research Unit of Molecular Epidemiology, Helmholtz Zentrum München, Neuherberg, Germany
- Institute of Epidemiology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Gabi Kastenmüller
- Institute of Bioinformatics and Systems Biology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Annette Peters
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Institute of Epidemiology, Helmholtz Zentrum München, Neuherberg, Germany
- German Research Center for Cardiovascular Disease (DZHK-Munich partner site), Neuherberg, Germany
| | - Hannelore Daniel
- ZIEL-Research Center for Nutrition and Food Sciences, TUM School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
- Chair of Physiology of Human Nutrition, TUM School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
| | - Jan Krumsiek
- Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany
- Institute for Computational Biomedicine, Englander Institute for Precision Medicine, Department of Physiology and Biophysics, Weill Cornell Medicine, New York, United States of America
| | - Fabian J. Theis
- Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany
- Department of Mathematical Science, Technische Universität München, Garching, Germany
- * E-mail: (FJT); (HL)
| | - Hans Hauner
- Chair of Nutritional Medicine, Else Kröner-Fresenius-Center for Nutritional Medicine, TUM School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
- ZIEL-Research Center for Nutrition and Food Sciences, TUM School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München, Neuherberg, Germany
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Technische Universität München, Freising-Weihenstephan, Germany
- Else Kröner-Fresenius-Center for Nutritional Medicine, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - Helmut Laumen
- Chair of Nutritional Medicine, Else Kröner-Fresenius-Center for Nutritional Medicine, TUM School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
- ZIEL-Research Center for Nutrition and Food Sciences, TUM School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München, Neuherberg, Germany
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Technische Universität München, Freising-Weihenstephan, Germany
- Paediatric Nutritional Medicine, Else Kröner-Fresenius-Centre for Nutritional Medicine, TUM School of Life Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
- Institute of Experimental Genetics, Helmholtz Zentrum München, Neuherberg, Germany
- Research Unit Protein Science, Helmholtz Zentrum München, Neuherberg, Germany
- * E-mail: (FJT); (HL)
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9
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Rosendahl J, Kirsten H, Hegyi E, Kovacs P, Weiss FU, Laumen H, Lichtner P, Ruffert C, Chen JM, Masson E, Beer S, Zimmer C, Seltsam K, Algül H, Bühler F, Bruno MJ, Bugert P, Burkhardt R, Cavestro GM, Cichoz-Lach H, Farré A, Frank J, Gambaro G, Gimpfl S, Grallert H, Griesmann H, Grützmann R, Hellerbrand C, Hegyi P, Hollenbach M, Iordache S, Jurkowska G, Keim V, Kiefer F, Krug S, Landt O, Leo MD, Lerch MM, Lévy P, Löffler M, Löhr M, Ludwig M, Macek M, Malats N, Malecka-Panas E, Malerba G, Mann K, Mayerle J, Mohr S, te Morsche RHM, Motyka M, Mueller S, Müller T, Nöthen MM, Pedrazzoli S, Pereira SP, Peters A, Pfützer R, Real FX, Rebours V, Ridinger M, Rietschel M, Rösmann E, Saftoiu A, Schneider A, Schulz HU, Soranzo N, Soyka M, Simon P, Skipworth J, Stickel F, Strauch K, Stumvoll M, Testoni PA, Tönjes A, Werner L, Werner J, Wodarz N, Ziegler M, Masamune A, Mössner J, Férec C, Michl P, P H Drenth J, Witt H, Scholz M, Sahin-Tóth M. Genome-wide association study identifies inversion in the CTRB1-CTRB2 locus to modify risk for alcoholic and non-alcoholic chronic pancreatitis. Gut 2018; 67:1855-1863. [PMID: 28754779 PMCID: PMC6145291 DOI: 10.1136/gutjnl-2017-314454] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 06/16/2017] [Accepted: 06/24/2017] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Alcohol-related pancreatitis is associated with a disproportionately large number of hospitalisations among GI disorders. Despite its clinical importance, genetic susceptibility to alcoholic chronic pancreatitis (CP) is poorly characterised. To identify risk genes for alcoholic CP and to evaluate their relevance in non-alcoholic CP, we performed a genome-wide association study and functional characterisation of a new pancreatitis locus. DESIGN 1959 European alcoholic CP patients and population-based controls from the KORA, LIFE and INCIPE studies (n=4708) as well as chronic alcoholics from the GESGA consortium (n=1332) were screened with Illumina technology. For replication, three European cohorts comprising 1650 patients with non-alcoholic CP and 6695 controls originating from the same countries were used. RESULTS We replicated previously reported risk loci CLDN2-MORC4, CTRC, PRSS1-PRSS2 and SPINK1 in alcoholic CP patients. We identified CTRB1-CTRB2 (chymotrypsin B1 and B2) as a new risk locus with lead single-nucleotide polymorphism (SNP) rs8055167 (OR 1.35, 95% CI 1.23 to 1.6). We found that a 16.6 kb inversion in the CTRB1-CTRB2 locus was in linkage disequilibrium with the CP-associated SNPs and was best tagged by rs8048956. The association was replicated in three independent European non-alcoholic CP cohorts of 1650 patients and 6695 controls (OR 1.62, 95% CI 1.42 to 1.86). The inversion changes the expression ratio of the CTRB1 and CTRB2 isoforms and thereby affects protective trypsinogen degradation and ultimately pancreatitis risk. CONCLUSION An inversion in the CTRB1-CTRB2 locus modifies risk for alcoholic and non-alcoholic CP indicating that common pathomechanisms are involved in these inflammatory disorders.
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Affiliation(s)
- Jonas Rosendahl
- Department of Internal Medicine I, Martin Luther University, Halle, Germany
- Department of Internal Medicine, Neurology and Dermatology, Division of Gastroenterology, University of Leipzig, Leipzig, Germany
| | - Holger Kirsten
- Institute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Leipzig, Germany
- LIFE- Leipzig Research Center for Civilization Diseases, University of Leipzig, Leipzig, Germany
- Department of Cell Therapy, Fraunhofer Institute for Cell Therapy and Immunology (IZI), Leipzig, Germany
| | - Eszter Hegyi
- Department of Molecular and Cell Biology, Center for Exocrine Disorders, Boston University Henry M. Goldman School of Dental Medicine, Boston, Massachusetts, USA
| | - Peter Kovacs
- Leipzig University Medical Center, IFB Adiposity Diseases, University of Leipzig, Leipzig, Germany
| | - Frank Ulrich Weiss
- Department of Internal Medicine A, Ernst-Moritz-Arndt University, Greifswald, Germany
| | - Helmut Laumen
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, Technische Universität München (TUM), Freising, Germany
| | - Peter Lichtner
- Institute of Human Genetics, Helmholtz Centre Munich, German Research Centre for Environmental Health, Neuherberg, Germany
| | - Claudia Ruffert
- Department of Internal Medicine I, Martin Luther University, Halle, Germany
| | - Jian-Min Chen
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1078; Etablissement Français du Sang (EFS) – Bretagne; Faculté de Médecine et des Sciences de la Santé, Université de Bretagne Occidentale; Laboratoire de Génétique Moléculaire et d’Histocompatibilité, Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital Morvan, Brest, France
| | - Emmanuelle Masson
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1078; Etablissement Français du Sang (EFS) – Bretagne; Faculté de Médecine et des Sciences de la Santé, Université de Bretagne Occidentale; Laboratoire de Génétique Moléculaire et d’Histocompatibilité, Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital Morvan, Brest, France
| | - Sebastian Beer
- Department of Internal Medicine, Neurology and Dermatology, Division of Gastroenterology, University of Leipzig, Leipzig, Germany
| | - Constantin Zimmer
- Department of Internal Medicine, Neurology and Dermatology, Division of Gastroenterology, University of Leipzig, Leipzig, Germany
| | - Katharina Seltsam
- Department of Internal Medicine, Neurology and Dermatology, Division of Gastroenterology, University of Leipzig, Leipzig, Germany
| | - Hana Algül
- Department of Gastroenterology, Technische Universität München (TUM), Munich, Germany
| | - Florence Bühler
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, Technische Universität München (TUM), Freising, Germany
| | - Marco J Bruno
- Department of Gastroenterology & Hepatology, Erasmus Medical Centre, University Medical Centre Rotterdam, Rotterdam, The Netherlands
| | - Peter Bugert
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, Heidelberg University, German Red Cross Blood Service of Baden-Württemberg, Mannheim, Germany
| | - Ralph Burkhardt
- LIFE- Leipzig Research Center for Civilization Diseases, University of Leipzig, Leipzig, Germany
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University Hospital Leipzig, Leipzig, Germany
| | - Giulia Martina Cavestro
- Division of Gastroenterology and Gastrointestinal Endoscopy, Vita Salute San Raffaele University - San Raffaele Scientific Institute, Milan, Italy
| | - Halina Cichoz-Lach
- Department of Gastroenterology, Medical University of Lublin, Lublin, Poland
| | - Antoni Farré
- Department of Gastroenterology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Josef Frank
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim/Heidelberg University, Mannheim, Germany
| | - Giovanni Gambaro
- Division of Nephrology and Dialysis, Institute of Internal Medicine, Renal Program, Columbus-Gemelli University Hospital, Catholic University, Rome, Italy
| | - Sebastian Gimpfl
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, Technische Universität München (TUM), Freising, Germany
| | - Harald Grallert
- Research Unit of Molecular Epidemiology, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
- Institute of Epidemiology II, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
- German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
| | - Heidi Griesmann
- Department of Internal Medicine I, Martin Luther University, Halle, Germany
| | - Robert Grützmann
- Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Chirurgische Klinik, Erlangen, Germany
| | - Claus Hellerbrand
- Department of Internal Medicine I, University Hospital Regensburg, Regensburg, Germany
| | - Péter Hegyi
- Institute for Translational Medicine and First Department of Internal Medicine, University of Pécs, Pécs, Hungary
- HAS-SZTE, Momentum Gastroenterology Multidisciplinary Research Group, Szeged, Hungary
| | - Marcus Hollenbach
- Department of Internal Medicine I, Martin Luther University, Halle, Germany
| | - Sevastitia Iordache
- Department of Internal Medicine and Gastroenterology, University of Medicine and Pharmacy, Craiova, Romania
| | - Grazyna Jurkowska
- Department of Gastroenterology and Internal Medicine, Medical University Bialystok, Bialystok, Poland
| | - Volker Keim
- Department of Internal Medicine, Neurology and Dermatology, Division of Gastroenterology, University of Leipzig, Leipzig, Germany
| | - Falk Kiefer
- Department of Addictive Behavior and Addiction Medicine, Central Institute of Mental Health, Medical Faculty Mannheim/Heidelberg University, Mannheim, Germany
| | - Sebastian Krug
- Department of Internal Medicine I, Martin Luther University, Halle, Germany
| | | | - Milena Di Leo
- Division of Gastroenterology and Gastrointestinal Endoscopy, Vita Salute San Raffaele University - San Raffaele Scientific Institute, Milan, Italy
| | - Markus M Lerch
- Department of Internal Medicine A, Ernst-Moritz-Arndt University, Greifswald, Germany
| | - Philippe Lévy
- Pôle des Maladies de l’Appareil Digestif, Service de Gastroentérologie-Pancréatologie, Hôpital Beaujon, AP-HP, Clichy, France
| | - Markus Löffler
- Institute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Leipzig, Germany
- LIFE- Leipzig Research Center for Civilization Diseases, University of Leipzig, Leipzig, Germany
| | - Matthias Löhr
- Gastrocentrum, Karolinska Institutet CLINTEC, Stockholm, Sweden
| | - Maren Ludwig
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, Technische Universität München (TUM), Freising, Germany
| | - Milan Macek
- Department of Biology and Medical Genetics, University Hospital Motol and 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Nuria Malats
- Grupo de Epidemiología Genética y Molecular Programa de Genética del Cáncer Humano Centro Nacional de Investigaciones Oncológicas (CNIO), Madrid, Spain
- CIBERONC, Spain
| | - Ewa Malecka-Panas
- Department of Digestive Tract Diseases, Medical University of Łódź, Łódź, Poland
| | - Giovanni Malerba
- Biology and Genetics, Department of Life and Reproduction Sciences, University of Verona, Verona, Italy
| | - Karl Mann
- Department of Addictive Behavior and Addiction Medicine, Central Institute of Mental Health, Medical Faculty Mannheim/Heidelberg University, Mannheim, Germany
| | - Julia Mayerle
- Department of Medicine II, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Sonja Mohr
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, Technische Universität München (TUM), Freising, Germany
| | - Rene H M te Morsche
- Department of Gastroenterology and Hepatology, Radboud umc, Nijmegen, The Netherlands
| | - Marie Motyka
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, Technische Universität München (TUM), Freising, Germany
| | - Sebastian Mueller
- Department of Internal Medicine, Salem Medical Centre and Centre for Alcohol Research, University of Heidelberg, Heidelberg, Germany
| | - Thomas Müller
- Department of Pediatrics I, Medical University, Innsbruck, Austria
| | - Markus M Nöthen
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
- Institute of Human Genetics, University of Bonn, Bonn, Germany
| | - Sergio Pedrazzoli
- Department of Medical and Surgical Sciences, IV Surgical Clinic, University of Padua, Padua, Italy
| | - Stephen P Pereira
- Division of Medicine, UCL Institute for Liver and Digestive Health, University College London, London, UK
| | - Annette Peters
- Institute of Epidemiology II, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
- German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
| | - Roland Pfützer
- Clinic for Internal Medicine, Hospital Döbeln, Döbeln, Germany
| | - Francisco X Real
- CIBERONC, Spain
- Epithelial Carcinogenesis Group, Molecular Pathology Programme, Centro Nacional de Investigaciones Oncológicas, Madrid, Spain
- Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, Barcelona, Spain
| | - Vinciane Rebours
- Pôle des Maladies de l’Appareil Digestif, Service de Gastroentérologie-Pancréatologie, Hôpital Beaujon, AP-HP, Clichy, France
| | - Monika Ridinger
- Department of Psychiatry, University of Regensburg, Regensburg, Germany
| | - Marcella Rietschel
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim/Heidelberg University, Mannheim, Germany
| | - Eva Rösmann
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, Technische Universität München (TUM), Freising, Germany
| | - Adrian Saftoiu
- Department of Internal Medicine and Gastroenterology, University of Medicine and Pharmacy, Craiova, Romania
| | - Alexander Schneider
- Department of Gastroenterology, Hepatology, Infectious Diseases, Medical Faculty of Mannheim University of Heidelberg, Mannheim, Germany
| | - Hans-Ulrich Schulz
- Department of Surgery, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Nicole Soranzo
- The Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, UK
- Department of Haematology, University of Cambridge, Cambridge, UK
| | - Michael Soyka
- Psychiatric Hospital, University of Munich, Munich, Germany
| | - Peter Simon
- Department of Internal Medicine A, Ernst-Moritz-Arndt University, Greifswald, Germany
| | - James Skipworth
- Department of Surgery and Interventional Science, University College London, London, UK
| | - Felix Stickel
- Department of Gastroenterology and Hepatology, University Hospital of Zürich, Zürich, Switzerland
| | - Konstantin Strauch
- Institute of Genetic Epidemiology, Helmholtz Zentrum München – German Research Center for Environmental Health, Neuherberg, Germany
- Institute of Medical Informatics, Biometry and Epidemiology, Chair of Genetic Epidemiology, Ludwig-Maximilians-Universität, Munich, Germany
| | - Michael Stumvoll
- Leipzig University Medical Center, IFB Adiposity Diseases, University of Leipzig, Leipzig, Germany
- Department of Internal Medicine, Neurology and Dermatology, Division of Endocrinology, University of Leipzig, Leipzig, Germany
| | - Pier Alberto Testoni
- Division of Gastroenterology and Gastrointestinal Endoscopy, Vita Salute San Raffaele University - San Raffaele Scientific Institute, Milan, Italy
| | - Anke Tönjes
- Department of Internal Medicine, Neurology and Dermatology, Division of Endocrinology, University of Leipzig, Leipzig, Germany
| | - Lena Werner
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, Technische Universität München (TUM), Freising, Germany
| | - Jens Werner
- Department of General, Visceral, and Transplant Surgery, Ludwig Maximilian University, Munich, Germany
| | - Norbert Wodarz
- Department of Psychiatry, University of Regensburg, Regensburg, Germany
| | - Martin Ziegler
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, Technische Universität München (TUM), Freising, Germany
| | - Atsushi Masamune
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, SendaiMiyagi, Japan
| | - Joachim Mössner
- Department of Internal Medicine, Neurology and Dermatology, Division of Gastroenterology, University of Leipzig, Leipzig, Germany
| | - Claude Férec
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1078; Etablissement Français du Sang (EFS) – Bretagne; Faculté de Médecine et des Sciences de la Santé, Université de Bretagne Occidentale; Laboratoire de Génétique Moléculaire et d’Histocompatibilité, Centre Hospitalier Régional Universitaire (CHRU) Brest, Hôpital Morvan, Brest, France
| | - Patrick Michl
- Department of Internal Medicine I, Martin Luther University, Halle, Germany
| | - Joost P H Drenth
- Department of Gastroenterology and Hepatology, Radboud umc, Nijmegen, The Netherlands
| | - Heiko Witt
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin (EKFZ), Paediatric Nutritional Medicine, Technische Universität München (TUM), Freising, Germany
| | - Markus Scholz
- Institute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Leipzig, Germany
- LIFE- Leipzig Research Center for Civilization Diseases, University of Leipzig, Leipzig, Germany
| | - Miklós Sahin-Tóth
- Department of Molecular and Cell Biology, Center for Exocrine Disorders, Boston University Henry M. Goldman School of Dental Medicine, Boston, Massachusetts, USA
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10
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Lee H, Qian K, von Toerne C, Hoerburger L, Claussnitzer M, Hoffmann C, Glunk V, Wahl S, Breier M, Eck F, Jafari L, Molnos S, Grallert H, Dahlman I, Arner P, Brunner C, Hauner H, Hauck SM, Laumen H. Allele-specific quantitative proteomics unravels molecular mechanisms modulated by cis-regulatory PPARG locus variation. Nucleic Acids Res 2017; 45:3266-3279. [PMID: 28334807 PMCID: PMC5389726 DOI: 10.1093/nar/gkx105] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 02/07/2017] [Indexed: 12/11/2022] Open
Abstract
Genome-wide association studies identified numerous disease risk loci. Delineating molecular mechanisms influenced by cis-regulatory variants is essential to understand gene regulation and ultimately disease pathophysiology. Combining bioinformatics and public domain chromatin information with quantitative proteomics supports prediction of cis-regulatory variants and enabled identification of allele-dependent binding of both, transcription factors and coregulators at the type 2 diabetes associated PPARG locus. We found rs7647481A nonrisk allele binding of Yin Yang 1 (YY1), confirmed by allele-specific chromatin immunoprecipitation in primary adipocytes. Quantitative proteomics also found the coregulator RING1 and YY1 binding protein (RYBP) whose mRNA levels correlate with improved insulin sensitivity in primary adipose cells carrying the rs7647481A nonrisk allele. Our findings support a concept with diverse cis-regulatory variants contributing to disease pathophysiology at one locus. Proteome-wide identification of both, transcription factors and coregulators, can profoundly improve understanding of mechanisms underlying genetic associations.
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Affiliation(s)
- Heekyoung Lee
- Else Kroener-Fresenius-Center for Nutritional Medicine, Chair of Nutritional Medicine, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,ZIEL - Institute for Food & Health, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München and Technische Universität München, 85354 Freising-Weihenstephan, Germany.,German Center for Diabetes Research (DZD), Germany
| | - Kun Qian
- Else Kroener-Fresenius-Center for Nutritional Medicine, Chair of Nutritional Medicine, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,ZIEL - Institute for Food & Health, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München and Technische Universität München, 85354 Freising-Weihenstephan, Germany.,German Center for Diabetes Research (DZD), Germany.,Research Unit Protein Science, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Christine von Toerne
- German Center for Diabetes Research (DZD), Germany.,Research Unit Protein Science, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Lena Hoerburger
- ZIEL - Institute for Food & Health, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,Else Kroener-Fresenius-Center for Nutritional Medicine, Paediatric Nutritional Medicine, Technische Universität München, 85354 Freising-Weihenstephan, Germany
| | - Melina Claussnitzer
- Else Kroener-Fresenius-Center for Nutritional Medicine, Chair of Nutritional Medicine, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,ZIEL - Institute for Food & Health, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München and Technische Universität München, 85354 Freising-Weihenstephan, Germany.,German Center for Diabetes Research (DZD), Germany.,Hebrew SeniorLife Institute for Aging Research, Harvard Medical School, Boston, MA 02131, USA
| | - Christoph Hoffmann
- ZIEL - Institute for Food & Health, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,Else Kroener-Fresenius-Center for Nutritional Medicine, Chair of Molecular Nutritional Medicine, Technische Universität München, 85354 Freising-Weihenstephan, Germany
| | - Viktoria Glunk
- Else Kroener-Fresenius-Center for Nutritional Medicine, Chair of Nutritional Medicine, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,ZIEL - Institute for Food & Health, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München and Technische Universität München, 85354 Freising-Weihenstephan, Germany.,German Center for Diabetes Research (DZD), Germany
| | - Simone Wahl
- German Center for Diabetes Research (DZD), Germany.,Research Unit of Molecular Epidemiology, Helmholtz Zentrum München, 85764 Neuherberg, Germany.,Institute of Epidemiology II, Helmholtz Zentrum München, Neuherberg, Germany
| | - Michaela Breier
- German Center for Diabetes Research (DZD), Germany.,Research Unit of Molecular Epidemiology, Helmholtz Zentrum München, 85764 Neuherberg, Germany.,Institute of Epidemiology II, Helmholtz Zentrum München, Neuherberg, Germany
| | - Franziska Eck
- Research Unit Protein Science, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Leili Jafari
- Research Unit Protein Science, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Sophie Molnos
- German Center for Diabetes Research (DZD), Germany.,Research Unit of Molecular Epidemiology, Helmholtz Zentrum München, 85764 Neuherberg, Germany.,Institute of Epidemiology II, Helmholtz Zentrum München, Neuherberg, Germany
| | - Harald Grallert
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München and Technische Universität München, 85354 Freising-Weihenstephan, Germany.,German Center for Diabetes Research (DZD), Germany.,Research Unit of Molecular Epidemiology, Helmholtz Zentrum München, 85764 Neuherberg, Germany.,Institute of Epidemiology II, Helmholtz Zentrum München, Neuherberg, Germany
| | - Ingrid Dahlman
- Department of Medicine, Huddinge, Karolinska Institutet, SE-141 86 Stockholm, Sweden
| | - Peter Arner
- Department of Medicine, Huddinge, Karolinska Institutet, SE-141 86 Stockholm, Sweden
| | - Cornelia Brunner
- Klinik für Hals-Nasen-Ohrenheilkunde, Universitätsklinik Ulm, 89075 Ulm, Germany
| | - Hans Hauner
- Else Kroener-Fresenius-Center for Nutritional Medicine, Chair of Nutritional Medicine, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,ZIEL - Institute for Food & Health, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München and Technische Universität München, 85354 Freising-Weihenstephan, Germany.,German Center for Diabetes Research (DZD), Germany.,Else Kroener-Fresenius-Center for Nutritional Medicine, Klinikum rechts der Isar, Technische Universität München, 81675 Munich, Germany
| | - Stefanie M Hauck
- German Center for Diabetes Research (DZD), Germany.,Research Unit Protein Science, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Helmut Laumen
- Else Kroener-Fresenius-Center for Nutritional Medicine, Chair of Nutritional Medicine, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,ZIEL - Institute for Food & Health, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München and Technische Universität München, 85354 Freising-Weihenstephan, Germany.,German Center for Diabetes Research (DZD), Germany.,Research Unit Protein Science, Helmholtz Zentrum München, 85764 Neuherberg, Germany.,Else Kroener-Fresenius-Center for Nutritional Medicine, Paediatric Nutritional Medicine, Technische Universität München, 85354 Freising-Weihenstephan, Germany.,Institute of Experimental Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
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11
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Nestor CE, Lentini A, Hägg Nilsson C, Gawel DR, Gustafsson M, Mattson L, Wang H, Rundquist O, Meehan RR, Klocke B, Seifert M, Hauck SM, Laumen H, Zhang H, Benson M. 5-Hydroxymethylcytosine Remodeling Precedes Lineage Specification during Differentiation of Human CD4(+) T Cells. Cell Rep 2016; 16:559-570. [PMID: 27346350 DOI: 10.1016/j.celrep.2016.05.091] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 03/24/2016] [Accepted: 05/22/2016] [Indexed: 12/17/2022] Open
Abstract
5-methylcytosine (5mC) is converted to 5-hydroxymethylcytosine (5hmC) by the TET family of enzymes as part of a recently discovered active DNA de-methylation pathway. 5hmC plays important roles in regulation of gene expression and differentiation and has been implicated in T cell malignancies and autoimmunity. Here, we report early and widespread 5mC/5hmC remodeling during human CD4(+) T cell differentiation ex vivo at genes and cell-specific enhancers with known T cell function. We observe similar DNA de-methylation in CD4(+) memory T cells in vivo, indicating that early remodeling events persist long term in differentiated cells. Underscoring their important function, 5hmC loci were highly enriched for genetic variants associated with T cell diseases and T-cell-specific chromosomal interactions. Extensive functional validation of 22 risk variants revealed potentially pathogenic mechanisms in diabetes and multiple sclerosis. Our results support 5hmC-mediated DNA de-methylation as a key component of CD4(+) T cell biology in humans, with important implications for gene regulation and lineage commitment.
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Affiliation(s)
- Colm E Nestor
- Centre for Personalized Medicine, Department of Pediatrics, Faculty of Medicine, Linköping University, 581 85 Linköping, Sweden.
| | - Antonio Lentini
- Centre for Personalized Medicine, Department of Pediatrics, Faculty of Medicine, Linköping University, 581 85 Linköping, Sweden
| | - Cathrine Hägg Nilsson
- Centre for Personalized Medicine, Department of Pediatrics, Faculty of Medicine, Linköping University, 581 85 Linköping, Sweden
| | - Danuta R Gawel
- Centre for Personalized Medicine, Department of Pediatrics, Faculty of Medicine, Linköping University, 581 85 Linköping, Sweden
| | - Mika Gustafsson
- Bioinformatics, Department of Physics, Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Lina Mattson
- Centre for Personalized Medicine, Department of Pediatrics, Faculty of Medicine, Linköping University, 581 85 Linköping, Sweden
| | - Hui Wang
- MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Olof Rundquist
- Centre for Personalized Medicine, Department of Pediatrics, Faculty of Medicine, Linköping University, 581 85 Linköping, Sweden
| | - Richard R Meehan
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road, Edinburgh EH4 2XU, UK
| | | | | | - Stefanie M Hauck
- Research Unit Protein Science, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, 85764 Neuherberg, Germany
| | - Helmut Laumen
- Else Kröner-Fresenius-Center for Nutritional Medicine, Chair of Nutritional Medicine, MRI and ZIEL, Technische Universität München, 85354 Freising-Weihenstephan, Germany; German Center for Diabetes Research (DZD), Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes at the Helmholtz Zentrum München, 85764 Neuherberg, Germany; Technische Universität München, 85354 Freising-Weihenstephan, Germany
| | - Huan Zhang
- Centre for Personalized Medicine, Department of Pediatrics, Faculty of Medicine, Linköping University, 581 85 Linköping, Sweden
| | - Mikael Benson
- Centre for Personalized Medicine, Department of Pediatrics, Faculty of Medicine, Linköping University, 581 85 Linköping, Sweden.
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12
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Strawbridge RJ, Laumen H, Hamsten A, Breier M, Grallert H, Hauner H, Arner P, Dahlman I. Effects of Genetic Loci Associated with Central Obesity on Adipocyte Lipolysis. PLoS One 2016; 11:e0153990. [PMID: 27104953 PMCID: PMC4841524 DOI: 10.1371/journal.pone.0153990] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 04/06/2016] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVES Numerous genetic loci have been associated with measures of central fat accumulation, such as waist-to-hip ratio adjusted for body mass index (WHRadjBMI). However the mechanisms by which genetic variations influence obesity remain largely elusive. Lipolysis is a key process for regulation of lipid storage in adipocytes, thus is implicated in obesity and its metabolic complications. Here, genetic variants at 36 WHRadjBMI-associated loci were examined for their influence on abdominal subcutaneous adipocyte lipolysis. SUBJECTS AND METHODS Fasting subcutaneous adipose tissue biopsies were collected from 789 volunteers (587 women and 202 men, body mass index (BMI) range 17.7-62.3 kg/m2). We quantified subcutaneous adipocyte lipolysis, both spontaneous and stimulated by the catecholamine isoprenaline or a cyclic AMP analogue. DNA was extracted from peripheral blood mononuclear cells and genotyping of SNPs associated with WHRadjBMI conducted. The effects on adipocyte lipolysis measures were assessed for SNPs individually and combined in a SNP score. RESULTS The WHRadjBMI-associated loci CMIP, PLXND1, VEGFA and ZNRF3-KREMEN1 demonstrated nominal associations with spontaneous and/or stimulated lipolysis. Candidate genes in these loci have been reported to influence NFκB-signaling, fat cell size and Wnt signalling, all of which may influence lipolysis. SIGNIFICANCE This report provides evidence for specific WHRadjBMI-associated loci as candidates to modulate adipocyte lipolysis. Additionally, our data suggests that genetically increased central fat accumulation is unlikely to be a major cause of altered lipolysis in abdominal adipocytes.
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Affiliation(s)
- Rona J. Strawbridge
- Atherosclerosis Research Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
| | - Helmut Laumen
- Chair of Nutritional Medicine, Else Kröner-Fresenius-Center for Nutritional Medicine and ZIEL-Research Center for Nutrition and Food Sciences, Technische Universität München, Munich, Germany
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum Muenchen and Technische Universität München, Munich, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Institute of Experimental Genetics, Helmholtz Zentrum Muenchen, German Research Center for Environmental Health, Neuherberg, Germany
| | - Anders Hamsten
- Atherosclerosis Research Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
| | - Michaela Breier
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Institute of Experimental Genetics, Helmholtz Zentrum Muenchen, German Research Center for Environmental Health, Neuherberg, Germany
- Research Unit of Molecular Epidemiology, Helmholtz Zentrum Muenchen, German Research Center for Environmental Health, Neuherberg, Germany
| | - Harald Grallert
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Research Unit of Molecular Epidemiology, Helmholtz Zentrum Muenchen, German Research Center for Environmental Health, Neuherberg, Germany
- Institute of Epidemiology II, Helmholtz Zentrum Muenchen, German Research Center for Environmental Health, Neuherberg, Germany
| | - Hans Hauner
- Chair of Nutritional Medicine, Else Kröner-Fresenius-Center for Nutritional Medicine and ZIEL-Research Center for Nutrition and Food Sciences, Technische Universität München, Munich, Germany
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum Muenchen and Technische Universität München, Munich, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Else Kröner-Fresenius-Center for Nutritional Medicine, Klinikum rechts der Isar, Technische Universität Muenchen, Munich, Germany
| | - Peter Arner
- Department of Medicine, Huddinge, Karolinska Institutet, Stockholm, Sweden
| | - Ingrid Dahlman
- Department of Medicine, Huddinge, Karolinska Institutet, Stockholm, Sweden
- * E-mail:
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13
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Halama A, Horsch M, Kastenmüller G, Möller G, Kumar P, Prehn C, Laumen H, Hauner H, Hrabĕ de Angelis M, Beckers J, Suhre K, Adamski J. Metabolic switch during adipogenesis: From branched chain amino acid catabolism to lipid synthesis. Arch Biochem Biophys 2016; 589:93-107. [DOI: 10.1016/j.abb.2015.09.013] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2015] [Revised: 09/13/2015] [Accepted: 09/15/2015] [Indexed: 01/14/2023]
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14
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Krinninger P, Ensenauer R, Ehlers K, Rauh K, Stoll J, Krauss-Etschmann S, Hauner H, Laumen H. Peripheral monocytes of obese women display increased chemokine receptor expression and migration capacity. J Clin Endocrinol Metab 2014; 99:2500-9. [PMID: 24606068 DOI: 10.1210/jc.2013-2611] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [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: 11/19/2022]
Abstract
CONTEXT The activation of peripheral immune cells and the infiltration of immune cells into adipose tissue in obesity are implicated in the development of type 2 diabetes mellitus. OBJECTIVE The aim of the study was to compare peripheral immune cells from obese and normal-weight women with regard to composition of immune cell subpopulations, surface expression of the chemokine receptors (CCRs) CCR2, CCR3, CCR5, and CXCR3 (chemokine (C-X-C motif) receptor 3) and cell-intrinsic migration capacity. DESIGN This was a case-control study. SETTING The study was conducted at a university clinical study center. PATIENTS Obese females and normal-weight females were included for fluorescence-activated cell sorting analysis and migration assays. MAIN OUTCOME MEASURES Peripheral blood mononuclear cells were prepared from fasting blood samples and used for fluorescence-activated cell sorting analysis and migration assays. RESULTS An increase in the percentages of CD14(+)CD16(+) monocytes was observed in obese subjects compared with controls. The CCR profile of monocytes differed significantly in the obese state; in particular, CCR2 levels were increased. In addition, a higher chemotactic activity of monocytes from obese subjects was observed in a migration assay, which was associated with both insulin resistance and CCR2 expression. CONCLUSION Our results suggest that the enhanced intrinsic migratory capacity of peripheral monocytes in obese women may be due to the increased CCR expression, further supporting a link between peripheral immune cell dysfunction and obesity.
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Affiliation(s)
- P Krinninger
- Else Kroener-Fresenius Center for Nutritional Medicine (P.K., K.E., K.R., J.S., H.H., H.L.), Department of Nutritional Medicine, ZIEL Research Centre for Nutrition and Food Sciences, Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes (K.E., H.H., H.L.), Helmholtz Zentrum München and Technical University München, and Else Kroener-Fresenius-Center for Nutritional Medicine (H.H.), Klinikum Rechts der Isar, Technische Universität München, 85350 Freising-Weihenstephan, Germany; German Center for Diabetes Research, 85764 Neuherberg, Germany; Research Center (R.E.), Dr von Hauner Children's Hospital, Ludwig-Maximilians-Universität München, 80337 München, Germany; Comprehensive Pneumology Center (S.K.-E.), Helmholtz Zentrum München, Ludwig-Maximilians University, and Asklepios Clinic Gauting, 82131 München, Germany
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15
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Kretschmer A, Möller G, Lee H, Laumen H, von Toerne C, Schramm K, Prokisch H, Eyerich S, Wahl S, Baurecht H, Franke A, Claussnitzer M, Eyerich K, Teumer A, Milani L, Klopp N, Hauck SM, Illig T, Peters A, Waldenberger M, Adamski J, Reischl E, Weidinger S. A common atopy-associated variant in the Th2 cytokine locus control region impacts transcriptional regulation and alters SMAD3 and SP1 binding. Allergy 2014; 69:632-42. [PMID: 24661001 DOI: 10.1111/all.12394] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/12/2014] [Indexed: 01/17/2023]
Abstract
BACKGROUND Type 2 immune responses directed by Th2 cells and characterized by the signature cytokines IL4, IL5, and IL13 play major pathogenic roles in atopic diseases. Single nucleotide polymorphisms in the human Th2 cytokine locus in particular in a locus control region within the DNA repair gene RAD50, containing several RAD50 DNase1-hypersensitive sites (RHS), have been robustly associated with atopic traits in genome-wide association studies (GWAS). Functional variants in IL13 have been intensely studied, whereas no causative variants for the IL13-independent RAD50 signal have been identified yet. This study aimed to characterize the functional impact of the atopy-associated polymorphism rs2240032 located in the human RHS7 on cis-regulatory activity and differential binding of transcription factors. METHODS Differential transcription factor binding was analyzed by electrophoretic mobility shift assays (EMSAs) with Jurkat T-cell nuclear extracts. Identification of differentially binding factors was performed using mass spectrometry (LC-MS/MS). Reporter vector constructs carrying either the major or minor allele of rs2240032 were tested for regulating transcriptional activity in Jurkat and HeLa cells. RESULTS The variant rs2240032 impacts transcriptional activity and allele-specific binding of SMAD3, SP1, and additional putative protein complex partners. We further demonstrate that rs2240032 is located in an RHS7 subunit which itself encompasses repressor activity and might be important for the fine-tuning of transcription regulation within this region. CONCLUSION The human RHS7 critically contributes to the regulation of gene transcription, and the common atopy-associated polymorphism rs2240032 impacts transcriptional activity and transcription factor binding.
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16
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Claussnitzer M, Dankel SN, Klocke B, Grallert H, Glunk V, Berulava T, Lee H, Oskolkov N, Fadista J, Ehlers K, Wahl S, Hoffmann C, Qian K, Rönn T, Riess H, Müller-Nurasyid M, Bretschneider N, Schroeder T, Skurk T, Horsthemke B, Spieler D, Klingenspor M, Seifert M, Kern MJ, Mejhert N, Dahlman I, Hansson O, Hauck SM, Blüher M, Arner P, Groop L, Illig T, Suhre K, Hsu YH, Mellgren G, Hauner H, Laumen H. Leveraging cross-species transcription factor binding site patterns: from diabetes risk loci to disease mechanisms. Cell 2014; 156:343-58. [PMID: 24439387 DOI: 10.1016/j.cell.2013.10.058] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Revised: 09/05/2013] [Accepted: 10/30/2013] [Indexed: 10/25/2022]
Abstract
Genome-wide association studies have revealed numerous risk loci associated with diverse diseases. However, identification of disease-causing variants within association loci remains a major challenge. Divergence in gene expression due to cis-regulatory variants in noncoding regions is central to disease susceptibility. We show that integrative computational analysis of phylogenetic conservation with a complexity assessment of co-occurring transcription factor binding sites (TFBS) can identify cis-regulatory variants and elucidate their mechanistic role in disease. Analysis of established type 2 diabetes risk loci revealed a striking clustering of distinct homeobox TFBS. We identified the PRRX1 homeobox factor as a repressor of PPARG2 expression in adipose cells and demonstrate its adverse effect on lipid metabolism and systemic insulin sensitivity, dependent on the rs4684847 risk allele that triggers PRRX1 binding. Thus, cross-species conservation analysis at the level of co-occurring TFBS provides a valuable contribution to the translation of genetic association signals to disease-related molecular mechanisms.
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Affiliation(s)
- Melina Claussnitzer
- Chair of Nutritional Medicine, Technische Universität München, Else Kröner-Fresenius-Center for Nutritional Medicine, 85350 Freising-Weihenstephan, Germany; Nutritional Medicine Unit, ZIEL-Research Center for Nutrition and Food Sciences, Technische Universität München, 85350 Freising-Weihenstephan, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany; Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München, German Research Center for Environmental Health, 85764 Neuherberg, Germany and Technische Universität München, 85350 Freising-Weihenstephan, Germany; Hebrew SeniorLife Institute for Aging Research, Harvard Medical School, Boston, MA 02131, USA.
| | - Simon N Dankel
- Department of Clinical Science, University of Bergen, 5021 Bergen, Norway; K.G. Jebsen Center for Diabetes Research, Department of Clinical Science, University of Bergen, N-5021 Bergen, Norway; Hormone Laboratory, Haukeland University Hospital, 5021 Bergen, Norway
| | | | - Harald Grallert
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany; Research Unit of Molecular Epidemiology, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Viktoria Glunk
- Chair of Nutritional Medicine, Technische Universität München, Else Kröner-Fresenius-Center for Nutritional Medicine, 85350 Freising-Weihenstephan, Germany; Nutritional Medicine Unit, ZIEL-Research Center for Nutrition and Food Sciences, Technische Universität München, 85350 Freising-Weihenstephan, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany; Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München, German Research Center for Environmental Health, 85764 Neuherberg, Germany and Technische Universität München, 85350 Freising-Weihenstephan, Germany
| | - Tea Berulava
- Institut für Humangenetik, Universitätsklinikum Essen, Universität-Duisburg-Essen, 45147 Essen, Germany
| | - Heekyoung Lee
- Chair of Nutritional Medicine, Technische Universität München, Else Kröner-Fresenius-Center for Nutritional Medicine, 85350 Freising-Weihenstephan, Germany; Nutritional Medicine Unit, ZIEL-Research Center for Nutrition and Food Sciences, Technische Universität München, 85350 Freising-Weihenstephan, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany; Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München, German Research Center for Environmental Health, 85764 Neuherberg, Germany and Technische Universität München, 85350 Freising-Weihenstephan, Germany
| | - Nikolay Oskolkov
- Diabetes and Endocrinology Research Unit, Department of Clinical Sciences, Lund University, Malmö 20502, Sweden
| | - Joao Fadista
- Diabetes and Endocrinology Research Unit, Department of Clinical Sciences, Lund University, Malmö 20502, Sweden
| | - Kerstin Ehlers
- Chair of Nutritional Medicine, Technische Universität München, Else Kröner-Fresenius-Center for Nutritional Medicine, 85350 Freising-Weihenstephan, Germany; Nutritional Medicine Unit, ZIEL-Research Center for Nutrition and Food Sciences, Technische Universität München, 85350 Freising-Weihenstephan, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany; Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München, German Research Center for Environmental Health, 85764 Neuherberg, Germany and Technische Universität München, 85350 Freising-Weihenstephan, Germany
| | - Simone Wahl
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany; Research Unit of Molecular Epidemiology, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Christoph Hoffmann
- Nutritional Medicine Unit, ZIEL-Research Center for Nutrition and Food Sciences, Technische Universität München, 85350 Freising-Weihenstephan, Germany; Chair of Molecular Nutritional Medicine, Technische Universität München, Else Kröner-Fresenius-Center for Nutritional Medicine, 85350 Freising-Weihenstephan, Germany
| | - Kun Qian
- Chair of Nutritional Medicine, Technische Universität München, Else Kröner-Fresenius-Center for Nutritional Medicine, 85350 Freising-Weihenstephan, Germany; Nutritional Medicine Unit, ZIEL-Research Center for Nutrition and Food Sciences, Technische Universität München, 85350 Freising-Weihenstephan, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany; Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München, German Research Center for Environmental Health, 85764 Neuherberg, Germany and Technische Universität München, 85350 Freising-Weihenstephan, Germany
| | - Tina Rönn
- Diabetes and Endocrinology Research Unit, Department of Clinical Sciences, Lund University, Malmö 20502, Sweden
| | - Helene Riess
- Department of Internal Medicine II-Cardiology, University of Ulm Medical Center, 89081 Ulm, Germany; Institute of Epidemiology II, Helmholtz Zentrum München-German Research Center for Environmental Health, 85764 Neuherberg, Germany
| | - Martina Müller-Nurasyid
- Institute of Genetic Epidemiology, Helmholtz Zentrum München-German Research Center for Environmental Health, 85764 Neuherberg, Germany; Department of Medicine I, University Hospital Grosshadern, Ludwig-Maximilians-Universität, 81377 Munich, Germany; Institute of Medical Informatics, Biometry and Epidemiology, Chair of Genetic Epidemiology, Ludwig-Maximilians-Universität, 81377 Munich, Germany
| | | | - Timm Schroeder
- Research Unit Stem Cell Dynamics, Helmholtz Center Munich-German Research Center for Environmental Health GmbH, 85764 Neuherberg, Germany; Department of Biosystems Science and Engineering (D-BSSE), ETH Zurich, 4058 Basel, Switzerland
| | - Thomas Skurk
- Chair of Nutritional Medicine, Technische Universität München, Else Kröner-Fresenius-Center for Nutritional Medicine, 85350 Freising-Weihenstephan, Germany; Nutritional Medicine Unit, ZIEL-Research Center for Nutrition and Food Sciences, Technische Universität München, 85350 Freising-Weihenstephan, Germany; Else Kröner-Fresenius-Center for Nutritional Medicine, Klinikum rechts der Isar, Technische Universität München, 81675 Munich, Germany
| | - Bernhard Horsthemke
- Institut für Humangenetik, Universitätsklinikum Essen, Universität-Duisburg-Essen, 45147 Essen, Germany
| | | | - Derek Spieler
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, German Research Center for Environmental Health, Germany; Department of Neurology, Klinikum rechts der Isar, Technische Universität München, 81675 Munich, Germany
| | - Martin Klingenspor
- Nutritional Medicine Unit, ZIEL-Research Center for Nutrition and Food Sciences, Technische Universität München, 85350 Freising-Weihenstephan, Germany; Chair of Molecular Nutritional Medicine, Technische Universität München, Else Kröner-Fresenius-Center for Nutritional Medicine, 85350 Freising-Weihenstephan, Germany
| | | | - Michael J Kern
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Niklas Mejhert
- Department of Medicine, Karolinska Institutet, Center for Endocrinology and Metabolism, Karolinska University Hospital Huddinge, SE-141 86 Stockholm, Sweden
| | - Ingrid Dahlman
- Department of Medicine, Karolinska Institutet, Center for Endocrinology and Metabolism, Karolinska University Hospital Huddinge, SE-141 86 Stockholm, Sweden
| | - Ola Hansson
- Diabetes and Endocrinology Research Unit, Department of Clinical Sciences, Lund University, Malmö 20502, Sweden
| | - Stefanie M Hauck
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany; Research Unit Protein Science, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Matthias Blüher
- Department of Medicine, University of Leipzig, 04103 Leipzig, Germany
| | - Peter Arner
- Department of Medicine, Karolinska Institutet, Center for Endocrinology and Metabolism, Karolinska University Hospital Huddinge, SE-141 86 Stockholm, Sweden
| | - Leif Groop
- Diabetes and Endocrinology Research Unit, Department of Clinical Sciences, Lund University, Malmö 20502, Sweden
| | - Thomas Illig
- Research Unit of Molecular Epidemiology, Helmholtz Zentrum München, 85764 Neuherberg, Germany; Hanover Unified Biobank, Hanover Medical School, 30625 Hanover, Germany
| | - Karsten Suhre
- Institute of Bioinformatics and Systems Biology, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany; Department of Physiology and Biophysics, Weill Cornell Medical College in Qatar, Education City, Qatar Foundation, PO Box 24144, Doha, Qatar
| | - Yi-Hsiang Hsu
- Hebrew SeniorLife Institute for Aging Research, Harvard Medical School, Boston, MA 02131, USA; Molecular and Integrative Physiological Sciences, Harvard School of Public Health, Boston, MA 02115, USA
| | - Gunnar Mellgren
- Department of Clinical Science, University of Bergen, 5021 Bergen, Norway; K.G. Jebsen Center for Diabetes Research, Department of Clinical Science, University of Bergen, N-5021 Bergen, Norway; Hormone Laboratory, Haukeland University Hospital, 5021 Bergen, Norway
| | - Hans Hauner
- Chair of Nutritional Medicine, Technische Universität München, Else Kröner-Fresenius-Center for Nutritional Medicine, 85350 Freising-Weihenstephan, Germany; Nutritional Medicine Unit, ZIEL-Research Center for Nutrition and Food Sciences, Technische Universität München, 85350 Freising-Weihenstephan, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany; Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München, German Research Center for Environmental Health, 85764 Neuherberg, Germany and Technische Universität München, 85350 Freising-Weihenstephan, Germany; Else Kröner-Fresenius-Center for Nutritional Medicine, Klinikum rechts der Isar, Technische Universität München, 81675 Munich, Germany
| | - Helmut Laumen
- Chair of Nutritional Medicine, Technische Universität München, Else Kröner-Fresenius-Center for Nutritional Medicine, 85350 Freising-Weihenstephan, Germany; Nutritional Medicine Unit, ZIEL-Research Center for Nutrition and Food Sciences, Technische Universität München, 85350 Freising-Weihenstephan, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany; Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Helmholtz Zentrum München, German Research Center for Environmental Health, 85764 Neuherberg, Germany and Technische Universität München, 85350 Freising-Weihenstephan, Germany; Institute of Experimental Genetics, Helmholtz Zentrum München, Neuherberg 85764, Germany.
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17
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Spieler D, Kaffe M, Knauf F, Bessa J, Tena JJ, Giesert F, Schormair B, Tilch E, Lee H, Horsch M, Czamara D, Karbalai N, von Toerne C, Waldenberger M, Gieger C, Lichtner P, Claussnitzer M, Naumann R, Müller-Myhsok B, Torres M, Garrett L, Rozman J, Klingenspor M, Gailus-Durner V, Fuchs H, Hrabě de Angelis M, Beckers J, Hölter SM, Meitinger T, Hauck SM, Laumen H, Wurst W, Casares F, Gómez-Skarmeta JL, Winkelmann J. Restless legs syndrome-associated intronic common variant in Meis1 alters enhancer function in the developing telencephalon. Genome Res 2014; 24:592-603. [PMID: 24642863 PMCID: PMC3975059 DOI: 10.1101/gr.166751.113] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [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: 12/17/2022]
Abstract
Genome-wide association studies (GWAS) identified the MEIS1 locus for Restless Legs Syndrome (RLS), but causal single nucleotide polymorphisms (SNPs) and their functional relevance remain unknown. This locus contains a large number of highly conserved noncoding regions (HCNRs) potentially functioning as cis-regulatory modules. We analyzed these HCNRs for allele-dependent enhancer activity in zebrafish and mice and found that the risk allele of the lead SNP rs12469063 reduces enhancer activity in the Meis1 expression domain of the murine embryonic ganglionic eminences (GE). CREB1 binds this enhancer and rs12469063 affects its binding in vitro. In addition, MEIS1 target genes suggest a role in the specification of neuronal progenitors in the GE, and heterozygous Meis1-deficient mice exhibit hyperactivity, resembling the RLS phenotype. Thus, in vivo and in vitro analysis of a common SNP with small effect size showed allele-dependent function in the prospective basal ganglia representing the first neurodevelopmental region implicated in RLS.
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Affiliation(s)
- Derek Spieler
- Institute of Human Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health, 85764 Neuherberg, Germany
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18
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Then C, Wahl S, Kirchhofer A, Grallert H, Krug S, Kastenmüller G, Römisch-Margl W, Claussnitzer M, Illig T, Heier M, Meisinger C, Adamski J, Thorand B, Huth C, Peters A, Prehn C, Heukamp I, Laumen H, Lechner A, Hauner H, Seissler J. Plasma metabolomics reveal alterations of sphingo- and glycerophospholipid levels in non-diabetic carriers of the transcription factor 7-like 2 polymorphism rs7903146. PLoS One 2013; 8:e78430. [PMID: 24205231 PMCID: PMC3813438 DOI: 10.1371/journal.pone.0078430] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 09/20/2013] [Indexed: 11/18/2022] Open
Abstract
AIMS/HYPOTHESIS Polymorphisms in the transcription factor 7-like 2 (TCF7L2) gene have been shown to display a powerful association with type 2 diabetes. The aim of the present study was to evaluate metabolic alterations in carriers of a common TCF7L2 risk variant. METHODS Seventeen non-diabetic subjects carrying the T risk allele at the rs7903146 TCF7L2 locus and 24 subjects carrying no risk allele were submitted to intravenous glucose tolerance test and euglycemic-hyperinsulinemic clamp. Plasma samples were analysed for concentrations of 163 metabolites through targeted mass spectrometry. RESULTS TCF7L2 risk allele carriers had a reduced first-phase insulin response and normal insulin sensitivity. Under fasting conditions, carriers of TCF7L2 rs7903146 exhibited a non-significant increase of plasma sphingomyelins (SMs), phosphatidylcholines (PCs) and lysophosphatidylcholines (lysoPCs) species. A significant genotype effect was detected in response to challenge tests in 6 SMs (C16:0, C16:1, C18:0, C18:1, C24:0, C24:1), 5 hydroxy-SMs (C14:1, C16:1, C22:1, C22:2, C24:1), 4 lysoPCs (C14:0, C16:0, C16:1, C17:0), 3 diacyl-PCs (C28:1, C36:6, C40:4) and 4 long-chain acyl-alkyl-PCs (C40:2, C40:5, C44:5, C44:6). DISCUSSION Plasma metabolomic profiling identified alterations of phospholipid metabolism in response to challenge tests in subjects with TCF7L2 rs7903146 genotype. This may reflect a genotype-mediated link to early metabolic abnormalities prior to the development of disturbed glucose tolerance.
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Affiliation(s)
- Cornelia Then
- Medizinische Klinik und Poliklinik IV, Diabetes Zentrum - Campus Innenstadt, Klinikum der Universität München, Munich, Germany
- Clinical Cooperation Group Diabetes, Ludwig-Maximilians-Universität München and Helmholtz Zentrum München, Munich, Germany
| | - Simone Wahl
- Research Unit of Molecular Epidemiology, German Research Center for Environmental Health, Neuherberg, Germany
| | - Anna Kirchhofer
- Medizinische Klinik und Poliklinik IV, Diabetes Zentrum - Campus Innenstadt, Klinikum der Universität München, Munich, Germany
| | - Harald Grallert
- Clinical Cooperation Group Diabetes, Ludwig-Maximilians-Universität München and Helmholtz Zentrum München, Munich, Germany
- Research Unit of Molecular Epidemiology, German Research Center for Environmental Health, Neuherberg, Germany
| | - Susanne Krug
- Else-Kroener-Fresenius-Centre for Nutritional Medicine, ZIEL - Research Centre for Nutrition and Food Sciences, Technical University München, Freising-Weihenstephan, Germany
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Technical University München and Helmholtz Zentrum München, Munich, Germany
| | - Gabi Kastenmüller
- Institute of Bioinformatics and Systems Biology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Werner Römisch-Margl
- Institute of Bioinformatics and Systems Biology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Melina Claussnitzer
- Else-Kroener-Fresenius-Centre for Nutritional Medicine, ZIEL - Research Centre for Nutrition and Food Sciences, Technical University München, Freising-Weihenstephan, Germany
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Technical University München and Helmholtz Zentrum München, Munich, Germany
| | - Thomas Illig
- Hannover Unified Biobank, Hannover Medical School, Hannover, Germany
| | - Margit Heier
- Institute of Epidemiology II, Helmholtz Zentrum München – German Research Center for Environmental Health (GmbH), Neuherberg, Germany
| | - Christa Meisinger
- Institute of Epidemiology II, Helmholtz Zentrum München – German Research Center for Environmental Health (GmbH), Neuherberg, Germany
| | - Jerzy Adamski
- Institute of Experimental Genetics, Genome Analysis Center, Helmholtz Zentrum München, Neuherberg, Germany.
| | - Barbara Thorand
- Institute of Epidemiology II, Helmholtz Zentrum München – German Research Center for Environmental Health (GmbH), Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Cornelia Huth
- Institute of Epidemiology II, Helmholtz Zentrum München – German Research Center for Environmental Health (GmbH), Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Annette Peters
- Research Unit of Molecular Epidemiology, German Research Center for Environmental Health, Neuherberg, Germany
- Institute of Epidemiology II, Helmholtz Zentrum München – German Research Center for Environmental Health (GmbH), Neuherberg, Germany
| | - Cornelia Prehn
- Institute of Experimental Genetics, Genome Analysis Center, Helmholtz Zentrum München, Neuherberg, Germany.
| | - Ina Heukamp
- Medizinische Klinik und Poliklinik IV, Diabetes Zentrum - Campus Innenstadt, Klinikum der Universität München, Munich, Germany
| | - Helmut Laumen
- Else-Kroener-Fresenius-Centre for Nutritional Medicine, ZIEL - Research Centre for Nutrition and Food Sciences, Technical University München, Freising-Weihenstephan, Germany
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Technical University München and Helmholtz Zentrum München, Munich, Germany
| | - Andreas Lechner
- Medizinische Klinik und Poliklinik IV, Diabetes Zentrum - Campus Innenstadt, Klinikum der Universität München, Munich, Germany
- Clinical Cooperation Group Diabetes, Ludwig-Maximilians-Universität München and Helmholtz Zentrum München, Munich, Germany
| | - Hans Hauner
- Else-Kroener-Fresenius-Centre for Nutritional Medicine, ZIEL - Research Centre for Nutrition and Food Sciences, Technical University München, Freising-Weihenstephan, Germany
- Clinical Cooperation Group Nutrigenomics and Type 2 Diabetes, Technical University München and Helmholtz Zentrum München, Munich, Germany
| | - Jochen Seissler
- Medizinische Klinik und Poliklinik IV, Diabetes Zentrum - Campus Innenstadt, Klinikum der Universität München, Munich, Germany
- Clinical Cooperation Group Diabetes, Ludwig-Maximilians-Universität München and Helmholtz Zentrum München, Munich, Germany
- * E-mail:
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19
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Mueller K, Quandt J, Marienfeld RB, Weihrich P, Fiedler K, Claussnitzer M, Laumen H, Vaeth M, Berberich-Siebelt F, Serfling E, Wirth T, Brunner C. Octamer-dependent transcription in T cells is mediated by NFAT and NF-κB. Nucleic Acids Res 2013; 41:2138-54. [PMID: 23293002 PMCID: PMC3575799 DOI: 10.1093/nar/gks1349] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [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: 01/05/2023] Open
Abstract
The transcriptional co-activator BOB.1/OBF.1 was originally identified in B cells and is constitutively expressed throughout B cell development. BOB.1/OBF.1 associates with the transcription factors Oct1 and Oct2, thereby enhancing octamer-dependent transcription. In contrast, in T cells, BOB.1/OBF.1 expression is inducible by treatment of cells with PMA/Ionomycin or by antigen receptor engagement, indicating a marked difference in the regulation of BOB.1/OBF.1 expression in B versus T cells. The molecular mechanisms underlying the differential expression of BOB.1/OBF.1 in T and B cells remain largely unknown. Therefore, the present study focuses on mechanisms controlling the transcriptional regulation of BOB.1/OBF.1 and Oct2 in T cells. We show that both calcineurin- and NF-κB-inhibitors efficiently attenuate the expression of BOB.1/OBF.1 and Oct2 in T cells. In silico analyses of the BOB.1/OBF.1 promoter revealed the presence of previously unappreciated combined NFAT/NF-κB sites. An array of genetic and biochemical analyses illustrates the involvement of the Ca2+/calmodulin-dependent phosphatase calcineurin as well as NFAT and NF-κB transcription factors in the transcriptional regulation of octamer-dependent transcription in T cells. Conclusively, impaired expression of BOB.1/OBF.1 and Oct2 and therefore a hampered octamer-dependent transcription may participate in T cell-mediated immunodeficiency caused by the deletion of NFAT or NF-κB transcription factors.
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Affiliation(s)
- Kerstin Mueller
- Institute of Physiological Chemistry, University Ulm, D-89081 Ulm, Germany, Institute of Pathology, University Ulm, D-89081 Ulm, Germany
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Claussnitzer M, Hauner H, Laumen H. Funktionelle Charakterisierung eines regulatorischen PPARγ Polymorphismus. DIABETOL STOFFWECHS 2011. [DOI: 10.1055/s-0031-1277295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Krinninger P, Brunner C, Ruiz PA, Schneider E, Marx N, Foryst-Ludwig A, Kintscher U, Haller D, Laumen H, Hauner H. Role of the adipocyte-specific NF-κB activity in the regulation of IP-10 and T cell migration. Am J Physiol Endocrinol Metab 2011; 300:E304-11. [PMID: 21062959 DOI: 10.1152/ajpendo.00143.2010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Infiltration of immune cells into adipose tissue plays a central role in the pathophysiology of obesity-associated low-grade inflammation. The aim of this study was to analyze the role of adipocyte NF-κB signaling in the regulation of the chemokine/adipokine interferon-γ-induced protein 10 kDa (IP-10) and adipocyte-mediated T cell migration. Therefore, the regulation of IP-10 was investigated in adipose tissue of male C57BL/6J mice, primary human and 3T3-L1 preadipocytes/adipocytes. To specifically block the NF-κB pathway, 3T3-L1 cells stably overexpressing a transdominant mutant of IκBα were generated, and the chemical NF-κB inhibitor Bay117082 was used. Adipocyte-mediated T cell migration was assessed by a migration assay. It could be shown that IP-10 expression was higher in mature adipocytes compared with preadipocytes. Induced IP-10 expression and secretion were completely blocked by an NF-κB inhibitor in 3T3-L1 and primary human adipocytes. Stable overexpression of a transdominant mutant of IκBα in 3T3-L1 adipocytes led to an inhibition of basal and stimulated IP-10 expression and secretion. T cell migration was induced by 3T3-L1 adipocyte-conditioned medium, and both basal and induced T cell migration was strongly inhibited by stable overexpression of a transdominant IκBα mutant. In addition, with the use of an anti-IP-10 antibody, a significant decrease of adipocyte-induced T cell migration was shown. In conclusion, in this study, we could demonstrate that the NF-κB pathway is essential for the regulation of IP-10 in 3T3-L1 and primary human adipocytes. Adipocytes rather than preadipocytes contribute to NF-κB-dependent IP-10 expression and secretion. Furthermore, NF-κB-dependent factors and especially IP-10 represent novel signals from adipocytes to induce T cell migration.
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Tiller G, Fischer-Posovszky P, Laumen H, Finck A, Skurk T, Keuper M, Brinkmann U, Wabitsch M, Link D, Hauner H. Effects of TWEAK (TNF superfamily member 12) on differentiation, metabolism, and secretory function of human primary preadipocytes and adipocytes. Endocrinology 2009; 150:5373-83. [PMID: 19887572 DOI: 10.1210/en.2009-0488] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [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: 11/19/2022]
Abstract
Expansion of adipose tissue mass by hypertrophy and hyperplasia is the hallmark of obesity. An automated cDNA screen was established to identify secreted human proteins with an inhibitory effect on adipocyte differentiation and, thereby, a potential inhibitory effect on adipose tissue growth. A member of the TNF superfamily, TNF-like weak inducer of apoptosis (TWEAK; TNF superfamily 12) was identified by means of high-throughput screening with the lipophilic dye Nile Red as an inhibitor of murine adipocyte differentiation and, subsequently, also of human adipocyte differentiation. TWEAK inhibited lipid deposition in a dose-dependent manner without causing cytotoxic effects. This inhibitory action was mimicked by an agonistic antibody of the TWEAK receptor. The TWEAK receptor (fibroblast growth factor inducible 14; CD266) was expressed on human primary preadipocytes and mature adipocytes. Knockdown of TWEAK receptor by short-hairpin RNA abolished the inhibitory effect of TWEAK on cell differentiation, demonstrating that the effects of TWEAK are mediated by its specific receptor. Inhibition of differentiation was the result of interference at an early step of transcriptional activation as assessed by decreased peroxisome proliferator-activated receptor-gamma, CCAAT enhancer-binding protein alpha (C/EBPalpha), and CCAAT enhancer-binding protein beta (C/EBPbeta) mRNA expression. In contrast to TNFalpha, basal and insulin-stimulated glucose uptake and lipolysis of terminally differentiated mature adipocytes and secretion of proinflammatory cytokines were not altered in the presence of TWEAK, and nuclear factor kappa B activity was only weakly induced. We conclude from our findings that TWEAK and the corresponding agonistic antibody have the potential to prevent adipose tissue growth without adversely influencing central metabolic pathways or proinflammatory cytokine secretion in adipose tissue.
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Affiliation(s)
- Gabriele Tiller
- Else Kröner-Fresenius-Zentrum für Ernährungsmedizin, Technische Universität München, 85350 Freising, Germany
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Dietl P, Brunner C, Ruiz PA, Haller D, Hauner H, Laumen H. NF-κB-abhängige Regulation von IP-10 in 3T3-L1 und primären humanen Präadipozyten und Adipozyten. DIABETOL STOFFWECHS 2009. [DOI: 10.1055/s-0029-1221951] [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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Laumen H, Saningong AD, Heid IM, Hess J, Herder C, Claussnitzer M, Baumert J, Lamina C, Rathmann W, Sedlmeier EM, Klopp N, Thorand B, Wichmann HE, Illig T, Hauner H. Functional characterization of promoter variants of the adiponectin gene complemented by epidemiological data. Diabetes 2009; 58:984-91. [PMID: 19074982 PMCID: PMC2661577 DOI: 10.2337/db07-1646] [Citation(s) in RCA: 59] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Adiponectin (APM1, ACDC) is an adipocyte-derived protein with downregulated expression in obesity and insulin-resistant states. Several potentially regulatory single nucleotide polymorphisms (SNPs) within the APM1 gene promoter region have been associated with circulating adiponectin levels. None of them have been functionally characterized in adiponectin-expressing cells. Hence, we investigated three SNPs (rs16861194, rs17300539, and rs266729) for their influence on adiponectin promoter activity and their association with circulating adiponectin levels. RESEARCH DESIGN AND METHODS Basal and rosiglitazone-induced promoter activity of different SNP combinations (haplotypes) was analyzed in 3T3-L1 adipocytes using luciferase reporter gene assays and DNA binding studies comparing all possible APM1 haplotypes. This functional approach was complemented with analysis of epidemiological population-based data of 1,692 participants of the MONICA/KORA S123 cohort and 696 participants from the KORA S4 cohort for SNP and haplotype association with circulating adiponectin levels. RESULTS Major to minor allele replacements of the three SNPs revealed significant effects on promoter activity in luciferase assays. Particularly, a minor variant in rs16861194 resulted in reduced basal and rosiglitazone-induced promoter activity and hypoadiponectinemia in the epidemiological datasets. The haplotype with the minor allele in all three SNPs showed a complete loss of promoter activity, and no subject carried this haplotype in either of the epidemiological samples (combined P value for statistically significant difference from a random sample was 0.006). CONCLUSIONS Our results clearly demonstrate that promoter variants associated with hypoadiponectinemia in humans substantially affect adiponectin promoter activity in adipocytes. Our combination of functional experiments with epidemiological data overcomes the drawback of each approach alone.
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Affiliation(s)
- Helmut Laumen
- Else Kröner-Fresenius-Center for Nutritional Medicine, Technische Universität München, Munich, Germany.
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Holzapfel C, Klopp N, Grallert H, Huth C, Gieger C, Meisinger C, Strassburger K, Giani G, Wichmann HE, Laumen H, Hauner H, Herder C, Rathmann W, Illig T. Genetic variants in the leukemia-associated Rho guanine nucleotide exchange factor (ARHGEF12) gene are not associated with T2DM and related parameters in Caucasians (KORA study). Eur J Endocrinol 2007; 157:R1-5. [PMID: 17766704 DOI: 10.1530/eje-07-0297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE The aim of our study was to determine the variant pattern of the leukemia-associated Rho guanine nucleotide exchange factor (LARG, or ARHGEF12) gene and investigate whether LARG variants are associated with diabetes mellitus type 2 (T2DM), the metabolic syndrome (MetS), or related parameters such as insulin sensitivity in German Caucasians. DESIGN We analyzed single nucleotide polymorphisms (SNPs) in the LARG gene in the 55-74-year-old individuals of the population-based German Caucasian Cooperative Health Research in the region of Augsberg (KORA) survey 4 (S4). METHODS Sequencing of Tyr1306Cys, which was of functional relevance in Pima Indians, in 48 randomly selected individuals and genotyping of 11 additional LARG SNPs in 1653 subjects were performed. Four linkage disequilibrium (LD) blocks (r(2)> or =0.8) were established and each block was statistically analyzed for association with metabolic traits. The association with T2DM and the MetS was analyzed by logistic regression in 1462 subjects, and HOMA-IR (homeostasis model assessment of insulin resistance) as a measure of insulin sensitivity was analyzed by the Kruskal-Wallis test in 1346 fasting subjects. RESULTS The polymorphism Tyr1306Cys, which was significantly associated with insulin sensitivity in Pima Indians, was not found in the KORA S4 population. Statistical analysis yielded no significant associations (P>0.05) between the analyzed LARG variants and T2DM, the MetS, or related parameters such as insulin sensitivity. CONCLUSIONS Caucasian individuals and Pima Indians differ in their genetic variance pattern in the LARG gene region. There is no evidence in the Caucasian KORA study that variants of the LARG gene confer susceptibility for T2DM, insulin sensitivity, or the MetS.
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Affiliation(s)
- C Holzapfel
- GSF National Research Center for Environment and Health, Institute of Epidemiology, Ingolstädter Landstrasse 1, D-85764, Neuherberg, Germany
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Laumen H, Skurk T, Hauner H. The HMG-CoA reductase inhibitor rosuvastatin inhibits plasminogen activator inhibitor-1 expression and secretion in human adipocytes. Atherosclerosis 2007; 196:565-73. [PMID: 17692320 DOI: 10.1016/j.atherosclerosis.2007.06.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2007] [Revised: 06/10/2007] [Accepted: 06/19/2007] [Indexed: 11/19/2022]
Abstract
Human preadipocytes and adipocytes are known to produce the proatherogenic factor PAI-1 and proinflammatory cytokines, and obesity was found to be state of increased adipose production of these factors. In the present study, we investigated the effect of rosuvastatin on the regulation of PAI-1 gene expression in human adipocytes. Human preadipocytes, adipocytes in primary culture and the SGBS cell line were used as cell models. Cells were transfected using various constructs and promoter activity was measured as luciferase activity. PAI-1 expression was measured by quantitative RT-PCR and ELISA. Rosuvastatin inhibited PAI-1 mRNA expression and secretion of the protein in a concentration-dependent manner. This effect was reversed by isoprenoids. Addition of MEK-inhibitors and NFkappaB inhibitors also reduced PAI-1 expression and PAI-1 promoter luciferase activity. Further experiments revealed that rosuvastatin down-regulated the MEKK-1 mediated activation of the PAI-1 promoter. In conclusion our data suggest that rosuvastatin inhibits PAI-1 expression and release from human adipocytes via a MEKK-1-dependent but not a NFkappaB-dependent mechanism.
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Affiliation(s)
- Helmut Laumen
- Else Kröner-Fresenius-Centre for Nutritional Medicine, Am Forum 5, D-85350 Freising-Weihenstephan, Technische Universität München, Germany.
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Laumen H, Saningong AD, Hauner H. Funktionelle Charakterisierung regulatorischer Adiponectin SNPs. DIABETOL STOFFWECHS 2007. [DOI: 10.1055/s-2007-982141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Dietl P, Brunner C, Hauner H, Laumen H. NF-κB Aktivität und Regulation von Adipokinen in Maus 3T3-L1 Zellen. DIABETOL STOFFWECHS 2007. [DOI: 10.1055/s-2007-982423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Laumen H, Brunner C, Greiner A, Wirth T. Myosin light chain 1 atrial isoform (MLC1A) is expressed in pre-B cells under control of the BOB.1/OBF.1 coactivator. Nucleic Acids Res 2004; 32:1577-83. [PMID: 15004244 PMCID: PMC390310 DOI: 10.1093/nar/gkh327] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The BOB.1/OBF.1 protein is a B-cell-specific coactivator of the Oct1 and Oct2 transcription factors. It is involved in mediating the transcriptional activity of the Oct proteins. However, animals deficient for BOB.1/OBF.1 showed virtually normal expression of genes that contain octamer motifs in their regulatory regions. To identify new genes that are regulated by BOB.1/OBF.1, we took advantage of a previously described cell system. RNAs differentially expressed in a BOB.1/OBF.1-deficient pre-B cell line and a derivative of this cell line expressing a hormone dependent BOB.1/OBF.1-estrogen receptor (BobER) fusion protein were isolated. Using the cDNA representational difference analysis method we could identify myosin light chain 1 atrial (MLC1A) isoform as a gene regulated by BOB.1/OBF.1. MLC1A was so far unknown to be expressed in tissues other than muscle. Here we demonstrate that MLC1A is indeed expressed in mouse pre-B cells. Analysis of the expressed mRNA revealed an alternative 5' promoter element and an alternative splice product, which had not yet been described for the murine gene. Cotransfection experiments with reporter constructs driven by the MLC1A promoter suggest that the regulation by BOB.1/OBF.1 is indirect. Consistent with this conclusion is the observation that transcriptional induction of the endogenous MLC1A gene by BOB.1/OBF.1 requires de novo protein synthesis.
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Affiliation(s)
- Helmut Laumen
- Department of Physiological Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
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Brunner C, Laumen H, Nielsen PJ, Kraut N, Wirth T. Expression of the aldehyde dehydrogenase 2-like gene is controlled by BOB.1/OBF.1 in B lymphocytes. J Biol Chem 2003; 278:45231-9. [PMID: 12947107 DOI: 10.1074/jbc.m302539200] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
BOB.1/OBF.1 is a lymphocyte-restricted transcriptional coactivator. It binds to the Oct1 and Oct2 transcription factors and increases their transactivation potential. Targeted gene disruption experiments revealed that BOB.1/OBF.1 is critical at different stages of B cell development. A large number of genes expressed in B cells contain octamer motifs in their regulatory regions. However, only few genes have been described so far whose expression is dependent on BOB.1/OBF.1. To understand the molecular basis of BOB.1/OBF.1 function in B cell development, we searched for BOB.1/OBF.1 target genes by expression profiling. We have identified genes both induced and repressed by BOB.1/OBF.1. Using different genetic systems, we demonstrate regulation of a selection of these genes. Identified targets included genes encoding Ahd2-like, AKR1C13, Rbp1, Sdh, Idh2, protocadherin gamma, alpha-catenin, Ptprs, Id3, and Creg. Classification of BOB.1/OBF.1 target genes by function suggests that they affect various aspects of B cell physiology such as cellular metabolism, cell adhesion, and differentiation. To better understand the mechanism of BOB.1/OBF.1 action, we cloned the promoter of the gene encoding Ahd2-like, the gene showing the strongest regulation by BOB.1/OBF.1. This promoter indeed contains a perfect octamer motif. Furthermore, the motif was recognized by the Oct transcription factors as well as BOB.1/OBF.1 in vitro and in vivo, as shown by electromobility shift and chromatin immunoprecipitation assays. Transient transfections confirm that this promoter is activated by BOB.1/OBF.1. Our observations suggest that by regulating genes in different functional pathways, BOB.1/OBF.1 has a widespread effect on B cell development and function.
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Affiliation(s)
- Cornelia Brunner
- University of Ulm, Department of Physiological Chemistry, Albert-Einstein-Allee 11, D-89081 Ulm, Germany
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Theil J, Laumen H, Marafioti T, Hummel M, Lenz G, Wirth T, Stein H. Defective octamer-dependent transcription is responsible for silenced immunoglobulin transcription in Reed-Sternberg cells. Blood 2001; 97:3191-6. [PMID: 11342448 DOI: 10.1182/blood.v97.10.3191] [Citation(s) in RCA: 55] [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] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The absence of immunoglobulin (Ig) expression in B-cell-derived Hodgkin and Reed-Sternberg (HRS) cells of classical Hodgkin disease (cHD) was initially suggested to be caused by crippling mutations in the Ig promoter or coding region. More recent investigations have, however, challenged this concept. This study addressed the role of mutations in the Ig promoter region in HRS cells. Nine cases of cHD and 3 B-cell-derived HD lines were analyzed for mutations in the TATA box and octamer motif of the Ig promoter. Mutations in the octamer motif were found in only 1 of the 9 cases and in 1 of the 3 HD cell lines (L1236). Furthermore, in all cases either a complete lack or strong reduction in the expression of the Oct2 transcription factor and the BOB.1/OBF.1 coactivator were found. The relevance of the rare promoter mutations was investigated by assaying the activity of Ig promoter reporter constructs transfected into the HD cell line L1236, which harbors a mutated octamer motif. These Ig reporter constructs were completely inactive in L1236 cells; however, their activity could be reconstituted by the cotransfection of a BOB.1/OBF.1 expression vector. The additional transfection with an Oct2 expression vector did not further enhance the Ig promoter activity. The conclusions drawn from these results are that crippling mutations in the Ig promoter and coding region are not the sole cause for the lack of Ig expression in HRS cells and that defects in the transcription machinery such as absence of BOB.1/OBF.1 are more important for this phenomenon.
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Affiliation(s)
- J Theil
- Institute of Pathology, Consultation and Reference Centre for Lymph Node Pathology and Haematopathology, University Hospital Benjamin Franklin, Free University, Berlin, Germany
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Stein H, Marafioti T, Foss HD, Laumen H, Hummel M, Anagnostopoulos I, Wirth T, Demel G, Falini B. Down-regulation of BOB.1/OBF.1 and Oct2 in classical Hodgkin disease but not in lymphocyte predominant Hodgkin disease correlates with immunoglobulin transcription. Blood 2001; 97:496-501. [PMID: 11154228 DOI: 10.1182/blood.v97.2.496] [Citation(s) in RCA: 212] [Impact Index Per Article: 9.2] [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: 11/20/2022] Open
Abstract
In contrast to the tumor cells (L&H cells) of lymphocyte predominant Hodgkin disease (LPHD), Hodgkin and Reed-Sternberg (HRS) cells of classical Hodgkin disease (cHD) are unable to transcribe immunoglobulin, despite the presence of rearranged immunoglobulin genes. Although initial studies have suggested crippling immunoglobulin gene mutations to be the cause of absent immunoglobulin expression in cHD, recent work of our group has demonstrated an impaired activation of the immunoglobulin promoter as a superior mechanism. As immunoglobulin transcription is mainly regulated by the B-cell transcription factors Oct2 and BOB.1/OBF.1, we analyzed 35 cases of LPHD, 32 cases of cHD, and 2 Hodgkin disease cell lines for the expression of these transcription factors and also in parallel for immunoglobulin expression. Our results demonstrate an absence of Oct2 and/or BOB.1/OBF.1 in cHD and a striking overexpression of Oct2 in LPHD. Immunoglobulin expression was lacking in cHD but present in LPHD. Furthermore, the reintroduction of BOB.1/OBF.1 and Oct2 into cultured HRS cells restored the activity of cotransduced immunoglobulin promoter constructs. Our findings dismiss the concept that the different immunoglobulin expression in cHD and LPHD is due to disrupting mutations of immunoglobulin V genes in cHD but is most likely due to a down-regulation of Oct2 and/or BOB.1/OBF.1. This study further revealed Oct2 as a new and valuable marker for the identification of L&H cells and their distinction from HRS cells. The impairment of immunoglobulin transcription with a down-regulated synthesis of Oct2 and BOB.1/OBF.1 is the first established general recurrent defect found in HRS cells.
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Affiliation(s)
- H Stein
- Institute of Pathology, Consultation and Reference Centre for Lymph Node Pathology and Haematopathology, University Hospital Benjamin Franklin, Free University, Berlin, Germany.
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Marafioti T, Hummel M, Foss HD, Laumen H, Korbjuhn P, Anagnostopoulos I, Lammert H, Demel G, Theil J, Wirth T, Stein H. Hodgkin and reed-sternberg cells represent an expansion of a single clone originating from a germinal center B-cell with functional immunoglobulin gene rearrangements but defective immunoglobulin transcription. Blood 2000; 95:1443-50. [PMID: 10666223] [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: 02/15/2023] Open
Abstract
Single cell studies aimed at clarifying the nature and clonality of Hodgkin and Reed-Sternberg (HRS) cells of classical Hodgkin's disease (HD) have so far produced conflicting results. Using an improved single cell procedure, the HRS cells of 25 patients with nodular sclerosing HD lacking B- and T-cell antigens, with and without Epstein-Barr virus infection, were analyzed for the presence of immunoglobulin (Ig) gene rearrangements. One patient with HD developed follicular lymphoma 2 years later. Both lymphomas originated from a common precursor identified as a germinal center B cell. The data show that all but one of the investigated cases harbored rearranged Ig genes, which were clonal in all instances and carried a high load of somatic mutations. The Ig coding capacity was preserved in 18 of the 24 cases (75%) with rearrangements. However, expression of Ig messenger RNA was not detectable in the HRS cells with the exception of Ig kappa light chain expression in some tumor cells of 1 case. The lack of Ig gene transcription in HRS cells was confirmed by analyzing the HD cell lines L428 and KM-H2 in transient transfection experiments. An Ig promoter/enhancer reporter construct showed virtually no activity in these cells compared to 5 control B-cell lines. We conclude that (1) classical HD is a B-cell lymphoma in most instances, (2) HRS cells are clonal without any exception, (3) they are derived from germinal center B-cells that (4) mostly lack crippling mutations but (5) have consistently lost their Ig gene transcription ability, due to functional defects in the Ig gene regulatory elements. (Blood. 2000;95:1443-1450)
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Affiliation(s)
- T Marafioti
- Institute of Pathology and Consultation and Reference Centre for Lymph Node Pathology and Haematopathology, University Hospital Benjamin Franklin, Free University, Berlin, Germany
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Abstract
The BOB.1 / OBF.1 / OCA-B protein (henceforth designated as BOB.1 / OBF.1) is a B cell-specific co-activator of the Oct1 and Oct2 transcription factors. It is involved in mediating the transcriptional activity of these proteins. Surprisingly, animals deficient for BOB.1 / OBF.1 showed normal expression of genes that contain an octamer motif in their regulatory regions. Here we have addressed the role of BOB.1 / OBF.1 for octamer-dependent transcription. We show that promoters exclusively dependent on functional octamer motifs are completely inactive in BOB.1 / OBF. 1-deficient B cells. The lack of activity is a direct consequence of lack of the co-activator. To show this, a hormone-regulated conditional allele of BOB.1 / OBF.1 was introduced into the BOB.1 / OBF.1-deficient B cells. This resulted in the hormone-dependent transcriptional activity of octamer-dependent reporters in these cells. The BOB.1 / OBF.1 requirement for octamer promoter function was also observed when an authentic immunoglobulin kappa-promoter was assayed. BOB.1 / OBF.1 dependence could not be overcome by including the strong enhancer element from the immunoglobulin heavy chain gene. Induction of pre-B cells with lipopolysaccharide led to increased Oct2 levels but did not significantly increase octamer-dependent transcription in BOB.1 / OBF.1-deficient B cells. Thus, these results demonstrate that BOB.1 / OBF.1 itself is a non-redundant protein in B cells and absolutely required for octamer-dependent transcriptional activity.
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Affiliation(s)
- H Laumen
- Institut für Medizinische Strahlenkunde und Zellforschung Universität Würzburg, Würzburg, Germany
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Affiliation(s)
- J Hess
- MSZ, Institut für Medizinische Strahlenkunde und Zellforschung, Universität Würzburg, Germany
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Hess J, Laumen H, Wirth T. Application of differential cDNA screening techniques to the identification of unique gene expression in tumours and lymphocytes. Curr Opin Immunol 1998; 10:125-30. [PMID: 9602299 DOI: 10.1016/s0952-7915(98)80239-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Development, differentiation and cell death in all organisms are mediated by tightly regulated programs of differential gene expression. Furthermore, changes in gene expression profiles are responsible for tumour formation and tumour progression, as well as for many other human diseases. Thus, the definition of distinct patterns of gene expression is not only essential for understanding complex biological processes but also leads to the identification of novel targets for therapy of various diseases.
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Affiliation(s)
- J Hess
- Institut für Medizinische Strahlenkunde und Zellforschung, Universität Würzburg, Germany
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Laumen H. [Beyond the crumbled person. An observation on the oneness of man]. Tijdschr Ziekenverpl 1984; 37:675-7. [PMID: 6568775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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