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1دورية أكاديمية
المؤلفون: Amanda Takáts, Gergő Berke, Noémi Gede, Balázs Csaba Németh, Heiko Witt, Stanisław Głuszek, Agnieszka Magdalena Rygiel, Péter Hegyi, Miklós Sahin-Tóth, Eszter Hegyi
المصدر: PLoS ONE, Vol 17, Iss 5, p e0268859 (2022)
الوصف: The digestive protease chymotrypsin C (CTRC) protects the pancreas against pancreatitis by degrading potentially harmful trypsinogen. Loss-of-function genetic variants in CTRC increase risk for chronic pancreatitis (CP) with variable effect size, as judged by the reported odds ratio (OR) values. Here, we performed a meta-analysis of published studies on four variants that alter the CTRC amino-acid sequence, are clinically relatively common (global carrier frequency in CP >1%), reproducibly showed association with CP and their loss of function phenotype was verified experimentally. We found strong enrichment of CTRC variants p.A73T, p.V235I, p.K247_R254del, and p.R245W in CP cases versus controls, yielding OR values of 6.5 (95% confidence interval (CI) 2.4-17.8), 4.5 (CI 2.2-9.1), 5.4 (CI 2.6-11.0), and 2.6 (CI 1.6-4.2), respectively. Subgroup analysis demonstrated disease association of variants p.K247_R254del and p.R245W in alcoholic CP with similar effect sizes as seen in the overall CP group. Homozygosity or compound heterozygosity were rare and seemed to be associated with higher risk. We also identified a so far unreported linkage disequilibrium between variant p.K247_R254del and the common c.180C>T (p.G60 =) haplotype. Taken together, the results indicate that heterozygous loss-of-function CTRC variants increase the risk for CP approximately 3-7-fold. This meta-analysis confirms the clinical significance of CTRC variants and provides further justification for the genetic screening of CP patients.
وصف الملف: electronic resource
Relation: https://doaj.org/toc/1932-6203
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2دورية أكاديمية
المؤلفون: Tom Kaune, Marcus Hollenbach, Bettina Keil, Jian-Min Chen, Emmanuelle Masson, Carla Becker, Marko Damm, Claudia Ruffert, Robert Grützmann, Albrecht Hoffmeister, Rene H M Te Morsche, Giulia Martina Cavestro, Raffaella Alessia Zuppardo, Adrian Saftoiu, Ewa Malecka-Panas, Stanislaw Głuszek, Peter Bugert, Markus M Lerch, Frank Ulrich Weiss, Wen-Bin Zou, Zhuan Liao, Peter Hegyi, Joost Ph Drenth, Jan Riedel, Claude Férec, Markus Scholz, Holger Kirsten, Andrea Tóth, Maren Ewers, Heiko Witt, Heidi Griesmann, Patrick Michl, Jonas Rosendahl
المصدر: PLoS ONE, Vol 14, Iss 10, p e0222927 (2019)
الوصف: INTRODUCTION:Chronic pancreatitis (CP) may be caused by oxidative stress. An important source of reactive oxygen species (ROS) is the methylglyoxal-derived formation of advanced glycation endproducts (AGE). Methylglyoxal is detoxified by Glyoxalase I (GLO1). A reduction in GLO1 activity results in increased ROS. Single nucleotide polymorphisms (SNPs) of GLO1 have been linked to various inflammatory diseases. Here, we analyzed whether common GLO1 variants are associated with alcoholic (ACP) and non-alcoholic CP (NACP). METHODS:Using melting curve analysis, we genotyped a screening cohort of 223 ACP, 218 NACP patients, and 328 controls for 11 tagging SNPs defined by the SNPinfo LD TAG SNP Selection tool and the functionally relevant variant rs4746. For selected variants the cohorts were extended to up to 1,441 patient samples. RESULTS:In the ACP cohort, comparison of genotypes for rs1937780 between patients and controls displayed an ambiguous result in the screening cohort (p = 0.08). However, in the extended cohort of 1,441 patients no statistically significant association was found for the comparison of genotypes (p = 0.11), nor in logistic regression analysis (p = 0.214, OR 1.072, 95% CI 0.961-1.196). In the NACP screening cohort SNPs rs937662, rs1699012, and rs4746 displayed an ambiguous result when patients were compared to controls in the recessive or dominant model (p = 0.08, 0.08, and 0.07, respectively). Again, these associations were not confirmed in the extended cohorts (rs937662, dominant model: p = 0.07, logistic regression: p = 0.07, OR 1.207, 95% CI 0.985-1.480) or in the replication cohorts for rs4746 (Germany, p = 0.42, OR 1.080, 95% CI 0.673-1.124; France, p = 0.19, OR 0.90, 95% CI 0.76-1.06; China, p = 0.24, OR 1.18, 95% CI 0.90-1.54) and rs1699012 (Germany, Munich; p = 0.279, OR 0.903, 95% CI 0.750-1.087). CONCLUSIONS:Common GLO1 variants do not increase chronic pancreatitis risk.
وصف الملف: electronic resource
Relation: https://doaj.org/toc/1932-6203
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3دورية أكاديمية
المؤلفون: Wendy L van der Woerd, Désirée Y van Haaften-Visser, Stan F J van de Graaf, Claude Férec, Emmanuelle Masson, Janneke M Stapelbroek, Peter Bugert, Heiko Witt, Roderick H J Houwen
المصدر: PLoS ONE, Vol 8, Iss 11, p e80553 (2013)
الوصف: BackgroundMutations in genes encoding cationic trypsinogen (PRSS1), pancreatic secretory trypsin inhibitor (SPINK1) and chymotrypsinogen C (CTRC) are associated with chronic pancreatitis. However, in many patients with a familial chronic pancreatitis pattern suggesting a genetic cause, no mutations in either of these genes can be found, indicating that other, still unknown, associated genes exist. In this respect ATP8B1 is an interesting candidate due to its strong expression in the pancreas, its supposed general function in membrane organization and the higher incidence of pancreatitis in patients with ATP8B1 deficiency.MethodsWe analyzed all 27 ATP8B1 coding exons and adjacent non-coding sequences of 507 chronic pancreatitis patients by direct sequencing. Exons that harbored possible relevant variations were subsequently sequenced in 1,027 healthy controls.ResultsIn the exonic regions, 5 novel non-synonymous alterations were detected as well as 14 previously described alterations of which some were associated with ATP8B1 deficiency. However, allele frequencies for any of these variations did not significantly differ between patients and controls. Furthermore, several non-synonymous variants were exclusively detected in control subjects and multiple variants in the non-coding sequence were identified with similar frequencies in both groups.ConclusionsWe did not find an association between heterozygous ATP8B1 variants and chronic pancreatitis in our cohort of patients with hereditary and idiopathic chronic pancreatitis.
وصف الملف: electronic resource
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4دورية أكاديمية
المؤلفون: Janett Fischer, Stephan Böhm, Tobias Müller, Heiko Witt, Christoph Sarrazin, Simone Susser, Pascal Migaud, Eckart Schott, Graeme Stewart, Annika Brodzinski, Balazs Fülöp, Florian van Bömmel, Jacob George, Thomas Berg
المصدر: PLoS ONE, Vol 8, Iss 10, p e77530 (2013)
الوصف: BACKGROUND & AIMS:Genetic variations near the interferon lambda 3 gene (IFNL3, IL28B) are the most powerful predictors for sustained virologic response (SVR) in patients with chronic hepatitis C virus (HCV) infection, compared to other biochemical or histological baseline parameters. We evaluated whether the interplay of both IFNL3 polymorphisms rs12979860 and rs8099917 together with non-genetic clinical factors contributes to the predictive role of these genetic variants. METHODS:The cohort comprised 1,402 patients of European descent with chronic HCV type 1 infection. 1,298 patients received interferon-based antiviral therapy, and 719 (55%) achieved SVR. The IFNL3 polymorphisms were genotyped by polymerase chain reaction and melting curve analysis. RESULTS:A significant correlation was found between the IFNL3 polymorphisms and biochemical as well as virologic predictors of treatment outcome such as ALT, GGT, cholesterol, and HCV RNA levels. In multivariate regression analysis, IFLN3 SNPs, HCV RNA levels, and the GGT/ALT ratio were independent predictors of SVR. Dependent on the GGT/ALT ratio and on the HCV RNA concentration, significant variations in the likelihood for achieving SVR were observed in both, carriers of the responder as well as non-responder alleles. CONCLUSIONS:Our data support a clear association between IFNL3 genotypes and baseline parameters known to impact interferon responsiveness. Improved treatment outcome prediction was achieved when these predictors were considered in combination with the IFNL3 genotype.
وصف الملف: electronic resource
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5دورية أكاديمية
المؤلفون: Sebastian Weis, Moritz Jesinghaus, Peter Kovacs, Dorit Schleinitz, Robert Schober, Claudia Ruffert, Max Herms, Henning Wittenburg, Michael Stumvoll, Matthias Blüher, Robert Grützmann, Hans-Ulrich Schulz, Volker Keim, Joachim Mössner, Peter Bugert, Heiko Witt, Joost P H Drenth, Knut Krohn, Jonas Rosendahl
المصدر: PLoS ONE, Vol 7, Iss 5, p e37981 (2012)
الوصف: Heme oxygenase 1 (HMOX1) is the rate limiting enzyme in heme degradation and a key regulator of inflammatory processes. In animal models the course of pancreatitis was ameliorated by up-regulation of HMOX1 expression. Additionally, carbon monoxide released during heme breakdown inhibited proliferation of pancreatic stellate cells and might thereby prevent the development of chronic pancreatitis (CP). Transcription of HMOX1 in humans is influenced by a GT-repeat located in the promoter. As such, HMOX1 variants might be of importance in the pathogenesis of pancreatitis.The GT-repeat and SNP rs2071746 were investigated with fluorescence labelled primers and by melting curve analysis in 285 patients with acute pancreatitis, 208 patients with alcoholic CP, 207 patients with idiopathic/hereditary CP, 147 patients with alcoholic liver cirrhosis, and in 289 controls, respectively. GT-repeat analysis was extended to a total of 446 alcoholic CP patients. In addition, we performed DNA sequencing in 145 patients with alcoholic CP, 138 patients with idiopathic/hereditary CP, 147 patients with alcoholic liver cirrhosis, and 151 controls. Exon 3 screening was extended to additional patients and controls.S- and L-alleles of the GT-repeat, genotypes and alleles of SNP rs2071746 and non-synonymous variants detected by sequencing were found with similar frequencies in all groups.Although functional data implicate a potential influence of HMOX1 variants on the pathogenesis of pancreatitis, we did not find any association. As rare non-synonymous HMOX1 variants were found in patients and controls, it is rather unlikely that they will have functional consequences essential for pancreatitis development.
وصف الملف: electronic resource
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6دورية أكاديمية
المؤلفون: Jonas Rosendahl, Anke Tönjes, Dorit Schleinitz, Peter Kovacs, Johannes Wiegand, Claudia Ruffert, Moritz Jesinghaus, Robert Schober, Max Herms, Robert Grützmann, Hans-Ulrich Schulz, Felix Stickel, Jens Werner, Peter Bugert, Matthias Blüher, Michael Stumvoll, Stephan Böhm, Thomas Berg, Henning Wittenburg, Joachim Mössner, Rene te Morsche, Monique Derikx, Volker Keim, Heiko Witt, Joost P H Drenth
المصدر: PLoS ONE, Vol 7, Iss 1, p e29433 (2012)
الوصف: BACKGROUND: Chronic pancreatitis (CP) is an inflammatory disease that in some patients leads to exocrine and endocrine dysfunction. In industrialized countries the most common aetiology is chronic alcohol abuse. Descriptions of associated genetic alterations in alcoholic CP are rare. However, a common PNPLA3 variant (p.I148M) is associated with the development of alcoholic liver cirrhosis (ALC). Since, alcoholic CP and ALC share the same aetiology PNPLA3 variant (p.I148M) possibly influences the development of alcoholic CP. METHODS: Using melting curve analysis we genotyped the variant in 1510 patients with pancreatitis or liver disease (961 German and Dutch alcoholic CP patients, 414 German patients with idiopathic or hereditary CP, and 135 patients with ALC). In addition, we included in total 2781 healthy controls in the study. RESULTS: The previously published overrepresentation of GG-genotype was replicated in our cohort of ALC (p-value
وصف الملف: electronic resource
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المؤلفون: Emmanuelle Masson, Maren Ewers, Sumit Paliwal, Kiyoshi Kume, Virginie Scotet, David N. Cooper, Vinciane Rebours, Louis Buscail, Karen Rouault, Amandine Abrantes, Lina Aguilera Munoz, Jérémie Albouys, Laurent Alric, Xavier Amiot, Isabelle Archambeaud, Solène Audiau, Laetitia Bastide, Julien Baudon, Guy Bellaiche, Serge Bellon, Valérie Bertrand, Karine Bideau, Kareen Billiemaz, Claire Billioud, Sabine Bonnefoy, Corinne Borderon, Barbara Bournet, Estelle Breton, Mathias Brugel, Guillaume Cadiot, Marine Camus, Marine Carpentier-Pourquier, Patrick Chamouard, Ulriikka Chaput, Jian-Min Chen, Franck Cholet, Dragos Marius Ciocan, Christine Clavel, Benoit Coffin, Laura Coimet-Berger, Simona Cosconea, Isabelle Creveaux, Adrian Culetto, Oussama Daboussi, Louis De Mestier, Thibault Degand, Christelle D'engremont, Bernard Denis, Solène Dermine, null Desgrippes, Augustin Drouet D'Aubigny, Raphaël Enaud, Alexandre Fabre, Claude Férec, Dany Gargot, Eve Gelsi, Elena Gentilcore, Rodica Gincul, Emmanuelle Ginglinger-Favre, Marc Giovannini, Cécile Gomercic, Hannah Gondran, Thomas Grainville, Philippe Grandval, Denis Grasset, Stéphane Grimaldi, Sylvie Grimbert, Hervé Hagege, Sophie Heissat, Olivia Hentic, Anne Herber-Mayne, Marc Hervouet, Solene Hoibian, Jérémie Jacques, Bénédicte Jais, Mehdi Kaassis, Stéphane Koch, Elodie Lacaze, Joël Lacroute, Thierry Lamireau, Lucie Laurent, Xavier Le Guillou, Marc Le Rhun, Sarah Leblanc, Philippe Levy, Astrid Lievre, Diane Lorenzo, Frédérique Maire, Kévin Marcel, Jacques Mauillon, Stéphanie Morgant, Driffa Moussata, Nelly Muller, Sophie Nambot, Bertrand Napoleon, Anne Olivier, Maël Pagenault, Anne-laure Pelletier, Olivier Pennec, Fabien Pinard, Mathieu Pioche, Bénédicte Prost, Lucille Queneherve, Noemi Reboux, Samia Rekik, Ghassan Riachi, Barbara Rohmer, Bertrand Roquelaure, Isabelle Rosa Hezode, Florian Rostain, Jean-Christophe Saurin, Laure Servais, Roxana Stan-Iuga, Clément Subtil, Jérémy Tanneche, Charles Texier, Lucie Thomassin, David Tougeron, Lucine Vuitton, Timothée Wallenhorst, Marc Wangerme, Hélène Zanaldi, Frank Zerbib, Seema Bhaskar, Kazuhiro Kikuta, G Venkat Rao, Shin Hamada, D Nageshwar Reddy, Atsushi Masamune, Giriraj Ratan Chandak, Heiko Witt
المصدر: Pancreatology. 23:48-56
مصطلحات موضوعية: Hepatology, Endocrinology, Diabetes and Metabolism, Gastroenterology
الوصف: PRSS1 and PRSS2 constitute the only functional copies of a tandemly-arranged five-trypsinogen-gene cluster (i.e., PRSS1, PRSS3P1, PRSS3P2, TRY7 and PRSS2) on chromosome 7q35. Variants in PRSS1 and PRSS2, including missense and copy number variants (CNVs), have been reported to predispose to or protect against chronic pancreatitis (CP). We wondered whether a common trypsinogen pseudogene deletion CNV (that removes two of the three trypsinogen pseudogenes, PRSS3P2 and TRY7) might be associated with CP causation/predisposition.We analyzed the common PRSS3P2 and TRY7 deletion CNV in a total of 1536 CP patients and 3506 controls from France, Germany, India and Japan by means of quantitative fluorescent multiplex polymerase chain reaction.We demonstrated that the deletion CNV variant was associated with a protective effect against CP in the French, German and Japanese cohorts whilst a trend toward the same association was noted in the Indian cohort. Meta-analysis under a dominant model yielded a pooled odds ratio (OR) of 0.68 (95% confidence interval (CI) 0.52-0.89; p = 0.005) whereas an allele-based meta-analysis yielded a pooled OR of 0.84 (95% CI 0.77-0.92; p = 0.0001). This protective effect is explicable by reference to the recent finding that the still functional PRSS3P2/TRY7 pseudogene enhancers upregulate pancreatic PRSS2 expression.The common PRSS3P2 and TRY7 deletion CNV was associated with a reduced risk for CP. This finding provides additional support for the emerging view that dysregulated PRSS2 expression represents a discrete mechanism underlying CP predisposition or protection.
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المؤلفون: Katharina Eiseler, Lea Maria Dropmann, Peter Bugert, Maren Ewers, Heiko Witt
المصدر: Pancreatology. 22:1079-1083
مصطلحات موضوعية: Genotype, Hepatology, Pancreatitis, Chronic, Endocrinology, Diabetes and Metabolism, Gastroenterology, Humans, Water, Aquaporins, Pancreas, Exocrine
الوصف: Alterations in genes specifically expressed in the pancreas have been associated with chronic pancreatitis (CP). A significant percentage of patients with non-alcoholic CP, however, do not have mutations in known risk genes, suggesting the existence of further susceptibility genes. Four aquaporins are expressed in the exocrine pancreas: AQP1, AQP5, AQP8 and AQP12, the latter being found exclusively in this organ. Therefore, we investigated the two AQP12 genes, AQP12A and AQP12B, in CP patients.We analyzed all exons and adjacent intronic regions of AQP12A and AQP12B in 292 German patients with non-alcoholic CP and 143 control subjects by direct DNA sequencing.In total, we discovered 41 non-synonymous changes, three of which were nonsense variants. Genotype and allele frequencies of these variants did not differ significantly between patients and controls (all p-values0.05). Remarkably, we found a common nonsense variant in AQP12B, p.S152Tfs∗24, with an allele frequency of 15.7% in controls, including 2.8% homozygous subjects. This finding suggests that AQP12B is physiologically dispensable for normal pancreatic function.Our results suggest that genetic alterations in AQP12A and AQP12B do not predispose to the development of non-alcoholic CP.
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المؤلفون: Claudia Neubauer, Maren Ewers, Hans-Ulrich Schulz, Frank Ulrich Weiß, Felix Lämmerhirt, Markus M. Lerch, Peter Bugert, Olfert Landt, Hana Algül, Jonas Rosendahl, Heiko Witt
المصدر: Pancreas. 51:1231-1234
مصطلحات موضوعية: Endocrinology, Hepatology, Endocrinology, Diabetes and Metabolism, Internal Medicine
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::71dd97366cf6fc86cad2e0d518f456ba
https://doi.org/10.1097/mpa.0000000000002177 -
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المؤلفون: Andrea Tóth, Alexandra Demcsák, Florence Zankl, Grzegorz Oracz, Lara Sophie Unger, Peter Bugert, Helmut Laumen, Andrea Párniczky, Péter Hegyi, Jonas Rosendahl, Tomasz Gambin, Rafał Płoski, Dorota Koziel, Stanisław Gluszek, Fredrik Lindgren, J. Matthias Löhr, Miklós Sahin-Tóth, Heiko Witt, Agnieszka Magdalena Rygiel, Maren Ewers, Eszter Hegyi
المصدر: Pancreatology. 22:713-718
مصطلحات موضوعية: Pancreatic Elastase, Hepatology, Pancreatitis, Chronic, Endocrinology, Diabetes and Metabolism, Mutation, Gastroenterology, Chymotrypsin, Humans, Genetic Predisposition to Disease
الوصف: 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.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+1GA 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.In the German discovery cohort, we detected a splice-site variant in intron 2, c.129+1GA, 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.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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