Versemann, Lennart

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.journal","Visceral Medicine"],["dc.bibliographiccitation.lastpage","8"],["dc.contributor.author","Versemann, Lennart"],["dc.contributor.author","Hessmann, Elisabeth"],["dc.contributor.author","Ulisse, Maria"],["dc.date.accessioned","2021-12-01T09:22:26Z"],["dc.date.available","2021-12-01T09:22:26Z"],["dc.date.issued","2021"],["dc.description.abstract","<b><i>Background:</i></b> Pancreatic ductal adenocarcinoma (PDAC) remains a major challenge in cancer medicine and is characterized by a 5-year survival rate of <10%. Compelling evidence suggests that the devastating disease outcome of PDAC patients is linked to a high degree of intra- and interindividual tumor heterogeneity, which is predominantly installed at the level of gene transcription. The cellular and molecular complexities of the disease explain the poor efficacy of “one-size-fits-all” therapeutic approaches in PDAC treatment and strongly argue for pursuing tailored therapeutic strategies to tackle PDAC. In a highly dynamic manner, a network of transcription factors and epigenetic regulatory proteins temporally and spatially control the diverse transcriptomic states determining PDAC heterogeneity. Given the reversibility of epigenetic processes, pharmacological intervention with key epigenetic drivers of PDAC heterogeneity appeals as a promising concept to shift the transcriptomic phenotype of PDAC toward a less aggressive and more chemosensible state. <b><i>Summary:</i></b> In this review, we discuss the chances and pitfalls of epigenetic treatment strategies in overcoming and shifting molecular and cellular PDAC heterogeneities in order to combat PDAC. To this end, we utilized the keywords “pancreatic cancer,” “heterogeneity,” and “epigenetics” to search for relevant articles on the database PubMed and selected interventional studies enrolling PDAC patients as displayed in clinicaltrails.gov to generate a synopsis of clinical trials involving epigenetic targeting. <b><i>Key Messages:</i></b> Targeting epigenetic regulators in PDAC represents a promising concept to reprogram molecular and cellular tumor heterogeneities in the pancreas and hence to modulate the PDAC phenotype in favor of a less aggressive and more therapy susceptible disease course. However, we just start to understand the complex interactions of epigenetic regulators in controlling PDAC plasticity, and a clinical breakthrough utilizing epigenetic targeting in PDAC patients has not been achieved yet. Nevertheless, increasing translational efforts which consider the pleiotropic effects of targeting epigenetic regulation in different cellular compartments of the tumor and that focus on the utility and sequence of combinatory treatment approaches might pave the way toward novel epigenetic treatment strategies in PDAC therapy."],["dc.description.abstract","<b><i>Background:</i></b> Pancreatic ductal adenocarcinoma (PDAC) remains a major challenge in cancer medicine and is characterized by a 5-year survival rate of <10%. Compelling evidence suggests that the devastating disease outcome of PDAC patients is linked to a high degree of intra- and interindividual tumor heterogeneity, which is predominantly installed at the level of gene transcription. The cellular and molecular complexities of the disease explain the poor efficacy of “one-size-fits-all” therapeutic approaches in PDAC treatment and strongly argue for pursuing tailored therapeutic strategies to tackle PDAC. In a highly dynamic manner, a network of transcription factors and epigenetic regulatory proteins temporally and spatially control the diverse transcriptomic states determining PDAC heterogeneity. Given the reversibility of epigenetic processes, pharmacological intervention with key epigenetic drivers of PDAC heterogeneity appeals as a promising concept to shift the transcriptomic phenotype of PDAC toward a less aggressive and more chemosensible state. <b><i>Summary:</i></b> In this review, we discuss the chances and pitfalls of epigenetic treatment strategies in overcoming and shifting molecular and cellular PDAC heterogeneities in order to combat PDAC. To this end, we utilized the keywords “pancreatic cancer,” “heterogeneity,” and “epigenetics” to search for relevant articles on the database PubMed and selected interventional studies enrolling PDAC patients as displayed in clinicaltrails.gov to generate a synopsis of clinical trials involving epigenetic targeting. <b><i>Key Messages:</i></b> Targeting epigenetic regulators in PDAC represents a promising concept to reprogram molecular and cellular tumor heterogeneities in the pancreas and hence to modulate the PDAC phenotype in favor of a less aggressive and more therapy susceptible disease course. However, we just start to understand the complex interactions of epigenetic regulators in controlling PDAC plasticity, and a clinical breakthrough utilizing epigenetic targeting in PDAC patients has not been achieved yet. Nevertheless, increasing translational efforts which consider the pleiotropic effects of targeting epigenetic regulation in different cellular compartments of the tumor and that focus on the utility and sequence of combinatory treatment approaches might pave the way toward novel epigenetic treatment strategies in PDAC therapy."],["dc.identifier.doi","10.1159/000519859"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/94402"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-478"],["dc.relation.eissn","2297-475X"],["dc.relation.issn","2297-4725"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Epigenetic Therapeutic Strategies to Target Molecular and Cellular Heterogeneity in Pancreatic Cancer"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","14"],["dc.bibliographiccitation.journal","Cancers"],["dc.bibliographiccitation.volume","14"],["dc.contributor.affiliation","Versemann, Lennart; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; lennart.versemann@t-online.de (L.V.); shilpapatil528@gmail.com (S.P.); benjamin.steuber@med.uni-goettingen.de (B.S.); zhe.zhang@med.uni-goettingen.de (Z.Z.); wkopp@med.uni-goettingen.de (W.K.); albrecht.neesse@med.uni-goettingen.de (A.N.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.)"],["dc.contributor.affiliation","Patil, Shilpa; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; lennart.versemann@t-online.de (L.V.); shilpapatil528@gmail.com (S.P.); benjamin.steuber@med.uni-goettingen.de (B.S.); zhe.zhang@med.uni-goettingen.de (Z.Z.); wkopp@med.uni-goettingen.de (W.K.); albrecht.neesse@med.uni-goettingen.de (A.N.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.)"],["dc.contributor.affiliation","Steuber, Benjamin; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; lennart.versemann@t-online.de (L.V.); shilpapatil528@gmail.com (S.P.); benjamin.steuber@med.uni-goettingen.de (B.S.); zhe.zhang@med.uni-goettingen.de (Z.Z.); wkopp@med.uni-goettingen.de (W.K.); albrecht.neesse@med.uni-goettingen.de (A.N.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.)"],["dc.contributor.affiliation","Zhang, Zhe; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; lennart.versemann@t-online.de (L.V.); shilpapatil528@gmail.com (S.P.); benjamin.steuber@med.uni-goettingen.de (B.S.); zhe.zhang@med.uni-goettingen.de (Z.Z.); wkopp@med.uni-goettingen.de (W.K.); albrecht.neesse@med.uni-goettingen.de (A.N.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.)"],["dc.contributor.affiliation","Kopp, Waltraut; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; lennart.versemann@t-online.de (L.V.); shilpapatil528@gmail.com (S.P.); benjamin.steuber@med.uni-goettingen.de (B.S.); zhe.zhang@med.uni-goettingen.de (Z.Z.); wkopp@med.uni-goettingen.de (W.K.); albrecht.neesse@med.uni-goettingen.de (A.N.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.)"],["dc.contributor.affiliation","Krawczyk, Hannah Elisa; 2Clinical Research Unit 5002, KFO5002, University Medical Center Göttingen, 37075 Göttingen, Germany; elisa.krawczyk@outlook.de (H.E.K.); silke.kaulfuss@med.uni-goettingen.de (S.K.); bernd.wollnik@med.uni-goettingen.de (B.W.); philipp.stroebel@med.uni-goettingen.de (P.S.)"],["dc.contributor.affiliation","Kaulfuß, Silke; 2Clinical Research Unit 5002, KFO5002, University Medical Center Göttingen, 37075 Göttingen, Germany; elisa.krawczyk@outlook.de (H.E.K.); silke.kaulfuss@med.uni-goettingen.de (S.K.); bernd.wollnik@med.uni-goettingen.de (B.W.); philipp.stroebel@med.uni-goettingen.de (P.S.)"],["dc.contributor.affiliation","Wollnik, Bernd; 2Clinical Research Unit 5002, KFO5002, University Medical Center Göttingen, 37075 Göttingen, Germany; elisa.krawczyk@outlook.de (H.E.K.); silke.kaulfuss@med.uni-goettingen.de (S.K.); bernd.wollnik@med.uni-goettingen.de (B.W.); philipp.stroebel@med.uni-goettingen.de (P.S.)"],["dc.contributor.affiliation","Ströbel, Philipp; 2Clinical Research Unit 5002, KFO5002, University Medical Center Göttingen, 37075 Göttingen, Germany; elisa.krawczyk@outlook.de (H.E.K.); silke.kaulfuss@med.uni-goettingen.de (S.K.); bernd.wollnik@med.uni-goettingen.de (B.W.); philipp.stroebel@med.uni-goettingen.de (P.S.)"],["dc.contributor.affiliation","Neesse, Albrecht; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; lennart.versemann@t-online.de (L.V.); shilpapatil528@gmail.com (S.P.); benjamin.steuber@med.uni-goettingen.de (B.S.); zhe.zhang@med.uni-goettingen.de (Z.Z.); wkopp@med.uni-goettingen.de (W.K.); albrecht.neesse@med.uni-goettingen.de (A.N.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.)"],["dc.contributor.affiliation","Singh, Shiv K.; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; lennart.versemann@t-online.de (L.V.); shilpapatil528@gmail.com (S.P.); benjamin.steuber@med.uni-goettingen.de (B.S.); zhe.zhang@med.uni-goettingen.de (Z.Z.); wkopp@med.uni-goettingen.de (W.K.); albrecht.neesse@med.uni-goettingen.de (A.N.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.)"],["dc.contributor.affiliation","Ellenrieder, Volker; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; lennart.versemann@t-online.de (L.V.); shilpapatil528@gmail.com (S.P.); benjamin.steuber@med.uni-goettingen.de (B.S.); zhe.zhang@med.uni-goettingen.de (Z.Z.); wkopp@med.uni-goettingen.de (W.K.); albrecht.neesse@med.uni-goettingen.de (A.N.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.)"],["dc.contributor.affiliation","Hessmann, Elisabeth; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; lennart.versemann@t-online.de (L.V.); shilpapatil528@gmail.com (S.P.); benjamin.steuber@med.uni-goettingen.de (B.S.); zhe.zhang@med.uni-goettingen.de (Z.Z.); wkopp@med.uni-goettingen.de (W.K.); albrecht.neesse@med.uni-goettingen.de (A.N.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.)"],["dc.contributor.author","Versemann, Lennart"],["dc.contributor.author","Patil, Shilpa"],["dc.contributor.author","Steuber, Benjamin"],["dc.contributor.author","Zhang, Zhe"],["dc.contributor.author","Kopp, Waltraut"],["dc.contributor.author","Krawczyk, Hannah Elisa"],["dc.contributor.author","Kaulfuß, Silke"],["dc.contributor.author","Wollnik, Bernd"],["dc.contributor.author","Ströbel, Philipp"],["dc.contributor.author","Neesse, Albrecht"],["dc.contributor.author","Singh, Shiv K."],["dc.contributor.author","Ellenrieder, Volker"],["dc.contributor.author","Hessmann, Elisabeth"],["dc.date.accessioned","2022-08-04T08:34:43Z"],["dc.date.available","2022-08-04T08:34:43Z"],["dc.date.issued","2022-07-15"],["dc.date.updated","2022-08-03T11:58:42Z"],["dc.description.abstract","Epigenetic alterations contribute to the aggressiveness and therapy resistance of Pancreatic Ductal Adenocarcinoma (PDAC). However, epigenetic regulators, including Enhancer of Zeste Homolog 2 (EZH2), reveal a strong context-dependent activity. Our study aimed to examine the context-defining molecular prerequisites of oncogenic EZH2 activity in PDAC to assess the therapeutic efficacy of targeting EZH2. Our preclinical study using diverse PDAC models demonstrates that the TP53 status determines oncogenic EZH2 activity. Only in TP53-wildtype (wt) PDAC subtypes was EZH2 blockade associated with a favorable PDAC prognosis mainly through cell-death response. We revealed that EZH2 depletion increases p53wt stability by the de-repression of CDKN2A. Therefore, our study provides preclinical evidence that an intact CDKN2A-p53wt axis is indispensable for a beneficial outcome of EZH2 depletion and highlights the significance of molecular stratification to improve epigenetic targeting in PDAC. \r\n \r\n \r\n Abstract\r\n Pancreatic Ductal Adenocarcinoma (PDAC) represents a lethal malignancy with a consistently poor outcome. Besides mutations in PDAC driver genes, the aggressive tumor biology of the disease and its remarkable therapy resistance are predominantly installed by potentially reversible epigenetic dysregulation. However, epigenetic regulators act in a context-dependent manner with opposing implication on tumor progression, thus critically determining the therapeutic efficacy of epigenetic targeting. Herein, we aimed at exploring the molecular prerequisites and underlying mechanisms of oncogenic Enhancer of Zeste Homolog 2 (EZH2) activity in PDAC progression. Preclinical studies in EZH2 proficient and deficient transgenic and orthotopic in vivo PDAC models and transcriptome analysis identified the TP53 status as a pivotal context-defining molecular cue determining oncogenic EZH2 activity in PDAC. Importantly, the induction of pro-apoptotic gene signatures and processes as well as a favorable PDAC prognosis upon EZH2 depletion were restricted to p53 wildtype (wt) PDAC subtypes. Mechanistically, we illustrate that EZH2 blockade de-represses CDKN2A transcription for the subsequent posttranslational stabilization of p53wt expression and function. Together, our findings suggest an intact CDKN2A-p53wt axis as a prerequisite for the anti-tumorigenic consequences of EZH2 depletion and emphasize the significance of molecular stratification for the successful implementation of epigenetic targeting in PDAC."],["dc.description.sponsorship","Wilhelm-Sander Stiftung"],["dc.description.sponsorship","German Cancer Aid"],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft"],["dc.description.sponsorship","Ministry for Science and Culture in Lower Saxony/Volkswagenstiftung"],["dc.description.sponsorship","China Scholarship Council"],["dc.identifier.doi","10.3390/cancers14143451"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/112631"],["dc.language.iso","en"],["dc.relation.eissn","2072-6694"],["dc.rights","CC BY 4.0"],["dc.title","TP53-Status-Dependent Oncogenic EZH2 Activity in Pancreatic Cancer"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3463"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Cells"],["dc.bibliographiccitation.volume","10"],["dc.contributor.affiliation","Patil, Shilpa; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; shilpapatil528@gmail.com (S.P.); kristina.reutlinger@med.uni-goettingen.de (K.R.); wkopp@med.uni-goettingen.de (W.K.); lennart.versemann@t-online.de (L.V.); jspitali@med.uni-goettingen.de (J.S.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.); albrecht.neesse@med.uni-goettingen.de (A.N.)"],["dc.contributor.affiliation","Forster, Teresa; 2Department of Gastroenterology, Endocrinology, Metabolism and Clinical Infectiology, Philipps University Marburg, 35043 Marburg, Germany; terry.forster@web.de"],["dc.contributor.affiliation","Reutlinger, Kristina; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; shilpapatil528@gmail.com (S.P.); kristina.reutlinger@med.uni-goettingen.de (K.R.); wkopp@med.uni-goettingen.de (W.K.); lennart.versemann@t-online.de (L.V.); jspitali@med.uni-goettingen.de (J.S.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.); albrecht.neesse@med.uni-goettingen.de (A.N.)"],["dc.contributor.affiliation","Kopp, Waltraut; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; shilpapatil528@gmail.com (S.P.); kristina.reutlinger@med.uni-goettingen.de (K.R.); wkopp@med.uni-goettingen.de (W.K.); lennart.versemann@t-online.de (L.V.); jspitali@med.uni-goettingen.de (J.S.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.); albrecht.neesse@med.uni-goettingen.de (A.N.)"],["dc.contributor.affiliation","Versemann, Lennart; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; shilpapatil528@gmail.com (S.P.); kristina.reutlinger@med.uni-goettingen.de (K.R.); wkopp@med.uni-goettingen.de (W.K.); lennart.versemann@t-online.de (L.V.); jspitali@med.uni-goettingen.de (J.S.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.); albrecht.neesse@med.uni-goettingen.de (A.N.)"],["dc.contributor.affiliation","Spitalieri, Jessica; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; shilpapatil528@gmail.com (S.P.); kristina.reutlinger@med.uni-goettingen.de (K.R.); wkopp@med.uni-goettingen.de (W.K.); lennart.versemann@t-online.de (L.V.); jspitali@med.uni-goettingen.de (J.S.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.); albrecht.neesse@med.uni-goettingen.de (A.N.)"],["dc.contributor.affiliation","Gaedcke, Jochen; 3Clinical Research Unit KFO5002, University Medical Center Goettingen, 37075 Goettingen, Germany; jochen.gaedcke@med.uni-goettingen.de (J.G.); philipp.stroebel@med.uni-goettingen.de (P.S.)"],["dc.contributor.affiliation","Ströbel, Philipp; 3Clinical Research Unit KFO5002, University Medical Center Goettingen, 37075 Goettingen, Germany; jochen.gaedcke@med.uni-goettingen.de (J.G.); philipp.stroebel@med.uni-goettingen.de (P.S.)"],["dc.contributor.affiliation","Singh, Shiv K.; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; shilpapatil528@gmail.com (S.P.); kristina.reutlinger@med.uni-goettingen.de (K.R.); wkopp@med.uni-goettingen.de (W.K.); lennart.versemann@t-online.de (L.V.); jspitali@med.uni-goettingen.de (J.S.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.); albrecht.neesse@med.uni-goettingen.de (A.N.)"],["dc.contributor.affiliation","Ellenrieder, Volker; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; shilpapatil528@gmail.com (S.P.); kristina.reutlinger@med.uni-goettingen.de (K.R.); wkopp@med.uni-goettingen.de (W.K.); lennart.versemann@t-online.de (L.V.); jspitali@med.uni-goettingen.de (J.S.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.); albrecht.neesse@med.uni-goettingen.de (A.N.)"],["dc.contributor.affiliation","Neesse, Albrecht; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; shilpapatil528@gmail.com (S.P.); kristina.reutlinger@med.uni-goettingen.de (K.R.); wkopp@med.uni-goettingen.de (W.K.); lennart.versemann@t-online.de (L.V.); jspitali@med.uni-goettingen.de (J.S.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.); albrecht.neesse@med.uni-goettingen.de (A.N.)"],["dc.contributor.affiliation","Hessmann, Elisabeth; 1Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, 37075 Goettingen, Germany; shilpapatil528@gmail.com (S.P.); kristina.reutlinger@med.uni-goettingen.de (K.R.); wkopp@med.uni-goettingen.de (W.K.); lennart.versemann@t-online.de (L.V.); jspitali@med.uni-goettingen.de (J.S.); shiv.singh@med.uni-goettingen.de (S.K.S.); volker.ellenrieder@med.uni-goettingen.de (V.E.); albrecht.neesse@med.uni-goettingen.de (A.N.)"],["dc.contributor.author","Patil, Shilpa"],["dc.contributor.author","Forster, Teresa"],["dc.contributor.author","Reutlinger, Kristina"],["dc.contributor.author","Kopp, Waltraut"],["dc.contributor.author","Versemann, Lennart"],["dc.contributor.author","Spitalieri, Jessica"],["dc.contributor.author","Gaedcke, Jochen"],["dc.contributor.author","Ströbel, Philipp"],["dc.contributor.author","Singh, Shiv K."],["dc.contributor.author","Ellenrieder, Volker"],["dc.contributor.author","Hessmann, Elisabeth"],["dc.contributor.author","Neesse, Albrecht"],["dc.contributor.editor","Cavestro, Giulia Martina"],["dc.date.accessioned","2022-01-11T14:08:09Z"],["dc.date.available","2022-01-11T14:08:09Z"],["dc.date.issued","2021"],["dc.date.updated","2022-02-09T13:20:00Z"],["dc.description.abstract","Background: The Nuclear Factor of Activated T-cells 1 (NFATc1) transcription factor and the methyltransferase Enhancer of Zeste Homolog 2 (EZH2) significantly contribute to the aggressive phenotype of pancreatic ductal adenocarcinoma (PDAC). Herein, we aimed at dissecting the mechanistic background of their interplay in PDAC progression. Methods: NFATc1 and EZH2 mRNA and protein expression and complex formation were determined in transgenic PDAC models and human PDAC specimens. NFATc1 binding on the Ezh2 gene and the consequences of perturbed NFATc1 expression on Ezh2 transcription were explored by Chromatin Immunoprecipitation (ChIP) and upon transgenic or siRNA-mediated interference with NFATc1 expression, respectively. Integrative analyses of RNA- and ChIP-seq data was performed to explore NFATc1-/EZH2-dependent gene signatures. Results: NFATc1 targets the Ezh2 gene for transcriptional activation and biochemically interacts with the methyltransferase in murine and human PDAC. Surprisingly, our genome-wide binding and expression analyses do not link the protein complex to joint gene regulation. In contrast, our findings provide evidence for chromatin-independent functions of the NFATc1:EZH2 complex and reveal posttranslational EZH2 phosphorylation at serine 21 as a prerequisite for robust complex formation. Conclusion: Our findings disclose a previously unknown NFATc1-EZH2 axis operational in the pancreas and provide mechanistic insights into the conditions fostering NFATc1:EZH2 complex formation in PDAC."],["dc.description.abstract","Background: The Nuclear Factor of Activated T-cells 1 (NFATc1) transcription factor and the methyltransferase Enhancer of Zeste Homolog 2 (EZH2) significantly contribute to the aggressive phenotype of pancreatic ductal adenocarcinoma (PDAC). Herein, we aimed at dissecting the mechanistic background of their interplay in PDAC progression. Methods: NFATc1 and EZH2 mRNA and protein expression and complex formation were determined in transgenic PDAC models and human PDAC specimens. NFATc1 binding on the Ezh2 gene and the consequences of perturbed NFATc1 expression on Ezh2 transcription were explored by Chromatin Immunoprecipitation (ChIP) and upon transgenic or siRNA-mediated interference with NFATc1 expression, respectively. Integrative analyses of RNA- and ChIP-seq data was performed to explore NFATc1-/EZH2-dependent gene signatures. Results: NFATc1 targets the Ezh2 gene for transcriptional activation and biochemically interacts with the methyltransferase in murine and human PDAC. Surprisingly, our genome-wide binding and expression analyses do not link the protein complex to joint gene regulation. In contrast, our findings provide evidence for chromatin-independent functions of the NFATc1:EZH2 complex and reveal posttranslational EZH2 phosphorylation at serine 21 as a prerequisite for robust complex formation. Conclusion: Our findings disclose a previously unknown NFATc1-EZH2 axis operational in the pancreas and provide mechanistic insights into the conditions fostering NFATc1:EZH2 complex formation in PDAC."],["dc.identifier.doi","10.3390/cells10123463"],["dc.identifier.eissn","2073-4409"],["dc.identifier.pii","cells10123463"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/97947"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-507"],["dc.publisher","MDPI"],["dc.relation.eissn","2073-4409"],["dc.rights","Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/)."],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Chromatin-Independent Interplay of NFATc1 and EZH2 in Pancreatic Cancer"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e28324"],["dc.bibliographiccitation.journal","eLife"],["dc.bibliographiccitation.volume","6"],["dc.contributor.author","Denkert, Niels"],["dc.contributor.author","Schendzielorz, Alexander Benjamin"],["dc.contributor.author","Barbot, Mariam"],["dc.contributor.author","Versemann, Lennart"],["dc.contributor.author","Richter, Frank"],["dc.contributor.author","Rehling, Peter"],["dc.contributor.author","Meinecke, Michael"],["dc.date.accessioned","2020-12-10T18:48:05Z"],["dc.date.available","2020-12-10T18:48:05Z"],["dc.date.issued","2017"],["dc.description.abstract","Virtually all mitochondrial matrix proteins and a considerable number of inner membrane proteins carry a positively charged, N-terminal presequence and are imported by the TIM23 complex (presequence translocase) located in the inner mitochondrial membrane. The voltage-regulated Tim23 channel constitutes the actual protein-import pore wide enough to allow the passage of polypeptides with a secondary structure. In this study, we identify amino acids important for the cation selectivity of Tim23. Structure based mutants show that selectivity is provided by highly conserved, pore-lining amino acids. Mutations of these amino acid residues lead to reduced selectivity properties, reduced protein import capacity and they render the Tim23 channel insensitive to substrates. We thus show that the cation selectivity of the Tim23 channel is a key feature for substrate recognition and efficient protein import."],["dc.format.extent","1"],["dc.identifier.doi","10.7554/eLife.28324"],["dc.identifier.pmid","28857742"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16499"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/79012"],["dc.identifier.url","https://sfb1190.med.uni-goettingen.de/production/literature/publications/12"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation","SFB 1190: Transportmaschinen und Kontaktstellen zellulärer Kompartimente"],["dc.relation","SFB 1190 | P12: Funktionelle Regulation der mitochondrialen Präsequenz-Translokase"],["dc.relation.eissn","2050-084X"],["dc.relation.orgunit","Institut für Zellbiochemie"],["dc.relation.workinggroup","RG Meinecke (Molecular Membrane Biology)"],["dc.relation.workinggroup","RG Rehling (Mitochondrial Protein Biogenesis)"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject","S. cerevisiae; Tim23; biochemistry; biophysics; electrophysiology; membrane channels; mitochondria; mitochondrial biogenesis; protein trafficking; structural biology"],["dc.title","Cation selectivity of the presequence translocase channel Tim23 is crucial for efficient protein import"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]