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Böck J, Maurus K, Gerhard-Hartmann E, Brändlein S, Kurz KS, Ott G, Anagnostopoulos I, Rosenwald A, Zamò A. Targeted panel sequencing in the routine diagnosis of mature T- and NK-cell lymphomas: report of 128 cases from two German reference centers. Front Oncol 2023; 13:1231601. [PMID: 37664054 PMCID: PMC10468607 DOI: 10.3389/fonc.2023.1231601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 07/31/2023] [Indexed: 09/05/2023] Open
Abstract
Diagnosing any of the more than 30 types of T-cell lymphomas is considered a challenging task for many pathologists and currently requires morphological expertise as well as the integration of clinical data, immunophenotype, flow cytometry and clonality analyses. Even considering all available information, some margin of doubt might remain using the current diagnostic procedures. In recent times, the genetic landscape of most T-cell lymphomas has been elucidated, showing a number of diagnostically relevant mutations. In addition, recent data indicate that some of these genetic alterations might bear prognostic and predictive value. Extensive genetic analyses, such as whole exome or large panel sequencing are still expensive and time consuming, therefore limiting their application in routine diagnostic. We therefore devoted our effort to develop a lean approach for genetic analysis of T-cell lymphomas, focusing on maximum efficiency rather than exhaustively covering all possible targets. Here we report the results generated with our small amplicon-based panel that could be used routinely on paraffin-embedded and even decalcified samples, on a single sample basis in parallel with other NGS-panels used in our routine diagnostic lab, in a relatively short time and with limited costs. We tested 128 available samples from two German reference centers as part of our routine work up (among which 116 T-cell lymphomas), which is the largest routine diagnostic series reported to date. Our results showed that this assay had a very high rate of technical success (97%) and could detect mutations in the majority (79%) of tested T-cell lymphoma samples.
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Affiliation(s)
- Julia Böck
- Institute of Pathology, University of Würzburg, Würzburg, Germany
| | - Katja Maurus
- Institute of Pathology, University of Würzburg, Würzburg, Germany
| | | | | | - Katrin S. Kurz
- Department of Clinical Pathology, Robert-Bosch-Hospital, and Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany
| | - German Ott
- Department of Clinical Pathology, Robert-Bosch-Hospital, and Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany
| | | | | | - Alberto Zamò
- Institute of Pathology, University of Würzburg, Würzburg, Germany
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2
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Prat Castro S, Kudrina V, Jaślan D, Böck J, Scotto Rosato A, Grimm C. Neurodegenerative Lysosomal Storage Disorders: TPC2 Comes to the Rescue! Cells 2022; 11:cells11182807. [PMID: 36139381 PMCID: PMC9496660 DOI: 10.3390/cells11182807] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/01/2022] [Accepted: 09/06/2022] [Indexed: 12/24/2022] Open
Abstract
Lysosomal storage diseases (LSDs) resulting from inherited gene mutations constitute a family of disorders that disturb lysosomal degradative function leading to abnormal storage of macromolecular substrates. In most LSDs, central nervous system (CNS) involvement is common and leads to the progressive appearance of neurodegeneration and early death. A growing amount of evidence suggests that ion channels in the endolysosomal system play a crucial role in the pathology of neurodegenerative LSDs. One of the main basic mechanisms through which the endolysosomal ion channels regulate the function of the endolysosomal system is Ca2+ release, which is thought to be essential for intracellular compartment fusion, fission, trafficking and lysosomal exocytosis. The intracellular TRPML (transient receptor potential mucolipin) and TPC (two-pore channel) ion channel families constitute the main essential Ca2+-permeable channels expressed on endolysosomal membranes, and they are considered potential drug targets for the prevention and treatment of LSDs. Although TRPML1 activation has shown rescue effects on LSD phenotypes, its activity is pH dependent, and it is blocked by sphingomyelin accumulation, which is characteristic of some LSDs. In contrast, TPC2 activation is pH-independent and not blocked by sphingomyelin, potentially representing an advantage over TRPML1. Here, we discuss the rescue of cellular phenotypes associated with LSDs such as cholesterol and lactosylceramide (LacCer) accumulation or ultrastructural changes seen by electron microscopy, mediated by the small molecule agonist of TPC2, TPC2-A1-P, which promotes lysosomal exocytosis and autophagy. In summary, new data suggest that TPC2 is a promising target for the treatment of different types of LSDs such as MLIV, NPC1, and Batten disease, both in vitro and in vivo.
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Affiliation(s)
| | | | | | | | | | - Christian Grimm
- Correspondence: (A.S.R.); (C.G.); Tel.: +49-89-2180-73811 (C.G.)
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3
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Scotto Rosato A, Krogsaeter EK, Jaślan D, Abrahamian C, Montefusco S, Soldati C, Spix B, Pizzo MT, Grieco G, Böck J, Wyatt A, Wünkhaus D, Passon M, Stieglitz M, Keller M, Hermey G, Markmann S, Gruber-Schoffnegger D, Cotman S, Johannes L, Crusius D, Boehm U, Wahl-Schott C, Biel M, Bracher F, De Leonibus E, Polishchuk E, Medina DL, Paquet D, Grimm C. TPC2 rescues lysosomal storage in mucolipidosis type IV, Niemann-Pick type C1, and Batten disease. EMBO Mol Med 2022; 14:e15377. [PMID: 35929194 PMCID: PMC9449600 DOI: 10.15252/emmm.202115377] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 07/14/2022] [Accepted: 07/15/2022] [Indexed: 01/05/2023] Open
Abstract
Lysosomes are cell organelles that degrade macromolecules to recycle their components. If lysosomal degradative function is impaired, e.g., due to mutations in lysosomal enzymes or membrane proteins, lysosomal storage diseases (LSDs) can develop. LSDs manifest often with neurodegenerative symptoms, typically starting in early childhood, and going along with a strongly reduced life expectancy and quality of life. We show here that small molecule activation of the Ca2+‐permeable endolysosomal two‐pore channel 2 (TPC2) results in an amelioration of cellular phenotypes associated with LSDs such as cholesterol or lipofuscin accumulation, or the formation of abnormal vacuoles seen by electron microscopy. Rescue effects by TPC2 activation, which promotes lysosomal exocytosis and autophagy, were assessed in mucolipidosis type IV (MLIV), Niemann–Pick type C1, and Batten disease patient fibroblasts, and in neurons derived from newly generated isogenic human iPSC models for MLIV and Batten disease. For in vivo proof of concept, we tested TPC2 activation in the MLIV mouse model. In sum, our data suggest that TPC2 is a promising target for the treatment of different types of LSDs, both in vitro and in‐vivo.
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Affiliation(s)
- Anna Scotto Rosato
- Faculty of Medicine, Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians-Universität, Munich, Germany
| | - Einar K Krogsaeter
- Faculty of Medicine, Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians-Universität, Munich, Germany
| | - Dawid Jaślan
- Faculty of Medicine, Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians-Universität, Munich, Germany
| | - Carla Abrahamian
- Faculty of Medicine, Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians-Universität, Munich, Germany
| | | | - Chiara Soldati
- Telethon Institute of Genetics and Medicine, Naples, Italy
| | - Barbara Spix
- Faculty of Medicine, Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians-Universität, Munich, Germany
| | | | | | - Julia Böck
- Faculty of Medicine, Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians-Universität, Munich, Germany
| | - Amanda Wyatt
- Experimental Pharmacology, Center for Molecular Signaling (PZMS), Saarland University School of Medicine, Homburg, Germany
| | | | - Marcel Passon
- Faculty of Medicine, Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians-Universität, Munich, Germany
| | - Marc Stieglitz
- Department of Pharmacy, Center for Drug Research, Ludwig-Maximilians-Universität, Munich, Germany
| | - Marco Keller
- Department of Pharmacy, Center for Drug Research, Ludwig-Maximilians-Universität, Munich, Germany
| | - Guido Hermey
- Center for Molecular Neurobiology Hamburg (ZMNH), Institute of Molecular and Cellular Cognition, UKE, Hamburg, Germany
| | | | | | - Susan Cotman
- Department of Neurology, Center for Genomic Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Ludger Johannes
- Cellular and Chemical Biology Department, Institut Curie, U1143 INSERM, UMR3666 CNRS, PSL Research University, Paris, France
| | - Dennis Crusius
- Institute for Stroke and Dementia Research (ISD), Ludwig-Maximilians-University (LMU) Hospital, Munich, Germany
| | - Ulrich Boehm
- Experimental Pharmacology, Center for Molecular Signaling (PZMS), Saarland University School of Medicine, Homburg, Germany
| | | | - Martin Biel
- Department of Pharmacy, Center for Drug Research, Ludwig-Maximilians-Universität, Munich, Germany
| | - Franz Bracher
- Department of Pharmacy, Center for Drug Research, Ludwig-Maximilians-Universität, Munich, Germany
| | - Elvira De Leonibus
- Telethon Institute of Genetics and Medicine, Naples, Italy.,Institute of Biochemistry and Cell Biology (IBBC), CNR, Rome, Italy
| | | | - Diego L Medina
- Telethon Institute of Genetics and Medicine, Naples, Italy.,Medical Genetics Unit, Department of Medical and Translational Science, Federico II University, Naples, Italy
| | - Dominik Paquet
- Institute for Stroke and Dementia Research (ISD), Ludwig-Maximilians-University (LMU) Hospital, Munich, Germany.,Munich Cluster for Systems Neurology (SyNergy), Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Christian Grimm
- Faculty of Medicine, Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians-Universität, Munich, Germany
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4
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Galetzka D, Böck J, Wagner L, Dittrich M, Sinizyn O, Ludwig M, Rossmann H, Spix C, Radsak M, Scholz-Kreisel P, Mirsch J, Linke M, Brenner W, Marron M, Poplawski A, Haaf T, Schmidberger H, Prawitt D. Hypermethylation of RAD9A intron 2 in childhood cancer patients, leukemia and tumor cell lines suggest a role for oncogenic transformation. EXCLI J 2022; 21:117-143. [PMID: 35221838 PMCID: PMC8859646 DOI: 10.17179/excli2021-4482] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 12/15/2021] [Indexed: 12/18/2022]
Abstract
Most childhood cancers occur sporadically and cannot be explained by an inherited mutation or an unhealthy lifestyle. However, risk factors might trigger the oncogenic transformation of cells. Among other regulatory signals, hypermethylation of RAD9A intron 2 is responsible for the increased expression of RAD9A protein, which may play a role in oncogenic transformation. Here, we analyzed the RAD9A intron 2 methylation in primary fibroblasts of 20 patients with primary cancer in childhood and second primary cancer (2N) later in life, 20 matched patients with only one primary cancer in childhood (1N) and 20 matched cancer-free controls (0N), using bisulfite pyrosequencing and deep bisulfite sequencing (DBS). Four 1N patients and one 2N patient displayed elevated mean methylation levels (≥ 10 %) of RAD9A. DBS revealed ≥ 2 % hypermethylated alleles of RAD9A, indicative for constitutive mosaic epimutations. Bone marrow samples of NHL and AML tumor patients (n=74), EBV (Epstein Barr Virus) lymphoblasts (n=6), tumor cell lines (n=5) and FaDu subclones (n=13) were analyzed to substantiate our findings. We find a broad spectrum of tumor entities with an aberrant methylation of RAD9A. We detected a significant difference in mean methylation of RAD9A for NHL versus AML patients (p ≤0.025). Molecular karyotyping of AML samples during therapy with hypermethylated RAD9A showed an evolving duplication of 1.8 kb on Chr16p13.3 including the PKD1 gene. Radiation, colony formation assays, cell proliferation, PCR and molecular karyotyping SNP-array experiments using generated FaDu subclones suggest that hypermethylation of RAD9A intron 2 is associated with genomic imbalances in regions with tumor-relevant genes and survival of the cells. In conclusion, this is the very first study of RAD9A intron 2 methylation in childhood cancer and Leukemia. RAD9A epimutations may have an impact on leukemia and tumorigenesis and can potentially serve as a biomarker.
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Affiliation(s)
- Danuta Galetzka
- Department of Radiation Oncology and Radiation Therapy, University Medical Centre, Mainz, Germany
| | - Julia Böck
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany.,Institute of Pathology, Julius Maximilians University, Würzburg, Germany
| | - Lukas Wagner
- Center for Pediatrics and Adolescent Medicine, University Medical Centre, Mainz, Germany
| | - Marcus Dittrich
- Bioinformatics Department, Julius Maximilians University, Würzburg, Germany
| | - Olesja Sinizyn
- Department of Radiation Oncology and Radiation Therapy, University Medical Centre, Mainz, Germany
| | | | - Heidi Rossmann
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Centre, Mainz, Germany
| | - Claudia Spix
- Division of Childhood Cancer Epidemiology, Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Centre, Mainz, Germany
| | - Markus Radsak
- Department of Hematology, University Medical Centre, Mainz, Germany
| | | | - Johanna Mirsch
- Radiation Biology and DNA Repair, Technical University of Darmstadt, Germany
| | - Matthias Linke
- Institute of Human Genetics, University Medical Centre, Mainz, Germany
| | - Walburgis Brenner
- Department of Obstetrics and Women's Health, University Medical Centre, Mainz, Germany
| | - Manuela Marron
- Leibniz Institute for Prevention Research and Epidemiology - BIPS, Bremen, Germany
| | - Alicia Poplawski
- Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Centre, Mainz, Germany
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Heinz Schmidberger
- Department of Radiation Oncology and Radiation Therapy, University Medical Centre, Mainz, Germany
| | - Dirk Prawitt
- Center for Pediatrics and Adolescent Medicine, University Medical Centre, Mainz, Germany
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5
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Böck J, Krogsaeter E, Passon M, Chao YK, Sharma S, Grallert H, Peters A, Grimm C. Human genome diversity data reveal that L564P is the predominant TPC2 variant and a prerequisite for the blond hair associated M484L gain-of-function effect. PLoS Genet 2021; 17:e1009236. [PMID: 33465068 PMCID: PMC7845996 DOI: 10.1371/journal.pgen.1009236] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 01/29/2021] [Accepted: 10/29/2020] [Indexed: 12/29/2022] Open
Abstract
The endo-lysosomal two-pore channel (TPC2) has been established as an intracellular cation channel of significant physiological and pathophysiological relevance in recent years. For example, TPC2-/- mice show defects in cholesterol degradation, leading to hypercholesterinemia; TPC2 absence also results in mature-onset obesity, and a role in glucagon secretion and diabetes has been proposed. Infections with bacterial toxins or viruses e.g., cholera toxin or Ebola virus result in reduced infectivity rates in the absence of TPC2 or after pharmacological blockage, and TPC2-/- cancer cells lose their ability to migrate and metastasize efficiently. Finally, melanin production is affected by changes in hTPC2 activity, resulting in pigmentation defects and hair color variation. Here, we analyzed several publicly available genome variation data sets and identified multiple variations in the TPC2 protein in distinct human populations. Surprisingly, one variation, L564P, was found to be the predominant TPC2 isoform on a global scale. By applying endo-lysosomal patch-clamp electrophysiology, we found that L564P is a prerequisite for the previously described M484L gain-of-function effect that is associated with blond hair. Additionally, other gain-of-function variants with distinct geographical and ethnic distribution were discovered and functionally characterized. A meta-analysis of genome-wide association studies was performed, finding the polymorphisms to be associated with both distinct and overlapping traits. In sum, we present the first systematic analysis of variations in TPC2. We functionally characterized the most common variations and assessed their association with various disease traits. With TPC2 emerging as a novel drug target for the treatment of various diseases, this study provides valuable insights into ethnic and geographical distribution of TPC2 polymorphisms and their effects on channel activity.
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Affiliation(s)
- Julia Böck
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität, Munich, Germany
| | - Einar Krogsaeter
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität, Munich, Germany
| | - Marcel Passon
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität, Munich, Germany
| | - Yu-Kai Chao
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität, Munich, Germany
| | - Sapna Sharma
- Helmholtz Zentrum–Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH), Institute of Epidemiology, Neuherberg, Germany
| | - Harald Grallert
- Helmholtz Zentrum–Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH), Institute of Epidemiology, Neuherberg, Germany
| | - Annette Peters
- Helmholtz Zentrum–Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH), Institute of Epidemiology, Neuherberg, Germany
| | - Christian Grimm
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, Ludwig-Maximilians-Universität, Munich, Germany
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Böck J, Remmele CW, Dittrich M, Müller T, Kondova I, Persengiev S, Bontrop RE, Ade CP, Kraus TFJ, Giese A, El Hajj N, Schneider E, Haaf T. Cell Type and Species-specific Patterns in Neuronal and Non-neuronal Methylomes of Human and Chimpanzee Cortices. Cereb Cortex 2019; 28:3724-3739. [PMID: 30085031 PMCID: PMC6132288 DOI: 10.1093/cercor/bhy180] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 04/24/2018] [Accepted: 07/13/2018] [Indexed: 12/04/2022] Open
Abstract
Epigenetic changes have likely contributed to the large size and enhanced cognitive abilities of the human brain which evolved within the last 2 million years after the human–chimpanzee split. Using reduced representation bisulfite sequencing, we have compared the methylomes of neuronal and non-neuronal cells from 3 human and 3 chimpanzee cortices. Differentially methylated regions (DMRs) with genome-wide significance were enriched in specific genomic regions. Intraspecific methylation differences between neuronal and non-neuronal cells were approximately 3 times more abundant than interspecific methylation differences between human and chimpanzee cell types. The vast majority (>90%) of human intraspecific DMRs (including DMRs in retrotransposons) were hypomethylated in neurons, compared with glia. Intraspecific DMRs were enriched in genes associated with different neuropsychiatric disorders. Interspecific DMRs were enriched in genes showing human-specific brain histone modifications. Human–chimpanzee methylation differences were much more frequent in non-neuronal cells (n. DMRs = 666) than in neurons (n. DMRs = 96). More than 95% of interspecific DMRs in glia were hypermethylated in humans. Although without an outgroup we cannot assign whether a change in methylation occurred in the human or chimpanzee lineage, our results are consistent with a wave of methylation affecting several hundred non-neuronal genes during human brain evolution.
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Affiliation(s)
- Julia Böck
- Institute of Human Genetics, Julius Maximilians University Würzburg, Würzburg, Germany
| | - Christian W Remmele
- Department of Bioinformatics, Julius Maximilians University Würzburg, Würzburg Germany
| | - Marcus Dittrich
- Institute of Human Genetics, Julius Maximilians University Würzburg, Würzburg, Germany.,Department of Bioinformatics, Julius Maximilians University Würzburg, Würzburg Germany
| | - Tobias Müller
- Department of Bioinformatics, Julius Maximilians University Würzburg, Würzburg Germany
| | - Ivanela Kondova
- Biomedical Primate Research Center, 2288 GJ Rijswijk, The Netherlands
| | | | - Ronald E Bontrop
- Biomedical Primate Research Center, 2288 GJ Rijswijk, The Netherlands
| | - Carsten P Ade
- Institute of Biochemistry and Molecular Biology, Julius Maximilians University Würzburg, Würzburg, Germany
| | - Theo F J Kraus
- Center for Neuropathology and Prion Research, Ludwig Maximilians University Munich, Munich, Germany
| | - Armin Giese
- Center for Neuropathology and Prion Research, Ludwig Maximilians University Munich, Munich, Germany
| | - Nady El Hajj
- Institute of Human Genetics, Julius Maximilians University Würzburg, Würzburg, Germany
| | - Eberhard Schneider
- Institute of Human Genetics, Julius Maximilians University Würzburg, Würzburg, Germany
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University Würzburg, Würzburg, Germany
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Lekszas C, Nanda I, Vona B, Böck J, Ashrafzadeh F, Donyadideh N, Ebrahimzadeh F, Ahangari N, Maroofian R, Karimiani EG, Haaf T. Unbalanced segregation of a paternal t(9;11)(p24.3;p15.4) translocation causing familial Beckwith-Wiedemann syndrome: a case report. BMC Med Genomics 2019; 12:83. [PMID: 31174542 PMCID: PMC6555757 DOI: 10.1186/s12920-019-0539-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 05/28/2019] [Indexed: 01/29/2023] Open
Abstract
Background The vast majority of cases with Beckwith-Wiedemann syndrome (BWS) are caused by a molecular defect in the imprinted chromosome region 11p15.5. The underlying mechanisms include epimutations, uniparental disomy, copy number variations, and structural rearrangements. In addition, maternal loss-of-function mutations in CDKN1C are found. Despite growing knowledge on BWS pathogenesis, up to 20% of patients with BWS phenotype remain without molecular diagnosis. Case presentation Herein, we report an Iranian family with two females affected with BWS in different generations. Bisulfite pyrosequencing revealed hypermethylation of the H19/IGF2: intergenic differentially methylated region (IG DMR), also known as imprinting center 1 (IC1) and hypomethylation of the KCNQ1OT1: transcriptional start site (TSS) DMR (IC2). Array CGH demonstrated an 8 Mb duplication on chromosome 11p15.5p15.4 (205,827-8,150,933) and a 1 Mb deletion on chromosome 9p24.3 (209,020-1,288,114). Chromosome painting revealed that this duplication-deficiency in both patients is due to unbalanced segregation of a paternal reciprocal t(9;11)(p24.3;p15.4) translocation. Conclusions This is the first report of a paternally inherited unbalanced translocation between the chromosome 9 and 11 short arms underlying familial BWS. Copy number variations involving the 11p15.5 region are detected by the consensus diagnostic algorithm. However, in complex cases which do not only affect the BWS region itself, characterization of submicroscopic chromosome rearrangements can assist to estimate the recurrence risk and possible phenotypic outcomes.
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Affiliation(s)
- Caroline Lekszas
- Institute of Human Genetics, Julius Maximilians University Würzburg, Biozentrum, Am Hubland, 97074, Würzburg, Germany
| | - Indrajit Nanda
- Institute of Human Genetics, Julius Maximilians University Würzburg, Biozentrum, Am Hubland, 97074, Würzburg, Germany
| | - Barbara Vona
- Institute of Human Genetics, Julius Maximilians University Würzburg, Biozentrum, Am Hubland, 97074, Würzburg, Germany
| | - Julia Böck
- Institute of Human Genetics, Julius Maximilians University Würzburg, Biozentrum, Am Hubland, 97074, Würzburg, Germany
| | - Farah Ashrafzadeh
- Department of Pediatric Diseases, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Nahid Donyadideh
- Department of Pediatric Diseases, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Farnoosh Ebrahimzadeh
- Department of Internal Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Najmeh Ahangari
- Department of Modern Sciences and Technologies, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Reza Maroofian
- Molecular and Clinical Sciences Institute, St. George's University of London, Cranmer Terrace, London, UK
| | - Ehsan Ghayoor Karimiani
- Molecular and Clinical Sciences Institute, St. George's University of London, Cranmer Terrace, London, UK
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University Würzburg, Biozentrum, Am Hubland, 97074, Würzburg, Germany.
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8
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Potabattula R, Dittrich M, Böck J, Haertle L, Müller T, Hahn T, Schorsch M, Hajj NE, Haaf T. Allele-specific methylation of imprinted genes in fetal cord blood is influenced by cis-acting genetic variants and parental factors. Epigenomics 2018; 10:1315-1326. [PMID: 30238782 PMCID: PMC6240887 DOI: 10.2217/epi-2018-0059] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Aim: To examine the effects of genetic variation, parental age and BMI on parental allele-specific methylation of imprinted genes in fetal cord blood samples. Methodology: We have developed SNP genotyping and deep bisulphite sequencing assays for six imprinted genes to determine parental allele-specific methylation patterns in diploid somatic tissues. Results: Multivariate linear regression analyses revealed a negative correlation of paternal age with paternal MEG3 allele methylation in fetal cord blood. Methylation of the maternal PEG3 allele showed a positive correlation with maternal age. Paternal BMI was positively correlated with paternal MEST allele methylation. In addition to parental origin, allele-specific methylation of most imprinted genes was largely dependent on the underlying SNP haplotype. Conclusion: Our study supports the idea that parental factors can have an impact, although of small effect size, on the epigenome of the next generation, providing an additional layer of complexity to phenotypic diversity.
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Affiliation(s)
- Ramya Potabattula
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Marcus Dittrich
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany.,Department of Bioinformatics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Julia Böck
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Larissa Haertle
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Tobias Müller
- Department of Bioinformatics, Julius Maximilians University, 97074 Würzburg, Germany
| | | | | | - Nady El Hajj
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
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Böck J, Appenzeller S, Haertle L, Schneider T, Gehrig A, Schröder J, Rost S, Wolf B, Bartram CR, Sutter C, Haaf T. Single CpG hypermethylation, allele methylation errors, and decreased expression of multiple tumor suppressor genes in normal body cells of mutation-negative early-onset and high-risk breast cancer patients. Int J Cancer 2018; 143:1416-1425. [PMID: 29659014 PMCID: PMC6099327 DOI: 10.1002/ijc.31526] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 03/28/2018] [Indexed: 01/01/2023]
Abstract
To evaluate the role of constitutive epigenetic changes in normal body cells of BRCA1/BRCA2-mutation negative patients, we have developed a deep bisulfite sequencing assay targeting the promoter regions of 8 tumor suppressor (TS) genes (BRCA1, BRCA2, RAD51C, ATM, PTEN, TP53, MLH1, RB1) and the estrogene receptor gene (ESR1), which plays a role in tumor progression. We analyzed blood samples of two breast cancer (BC) cohorts with early onset (EO) and high risk (HR) for a heterozygous mutation, respectively, along with age-matched controls. Methylation analysis of up to 50,000 individual DNA molecules per gene and sample allowed quantification of epimutations (alleles with >50% methylated CpGs), which are associated with epigenetic silencing. Compared to ESR1, which is representative for an average promoter, TS genes were characterized by a very low (< 1%) average methylation level and a very low mean epimutation rate (EMR; < 0.0001% to 0.1%). With exception of BRCA1, which showed an increased EMR in BC (0.31% vs. 0.06%), there was no significant difference between patients and controls. One of 36 HR BC patients exhibited a dramatically increased EMR (14.7%) in BRCA1, consistent with a disease-causing epimutation. Approximately one third (15 of 44) EO BC patients exhibited increased rates of single CpG methylation errors in multiple TS genes. Both EO and HR BC patients exhibited global underexpression of blood TS genes. We propose that epigenetic abnormalities in normal body cells are indicative of disturbed mechanisms for maintaining low methylation and appropriate expression levels and may be associated with an increased BC risk.
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Affiliation(s)
- Julia Böck
- Institute of Human Genetics, University of Würzburg, Würzburg, Germany
| | | | - Larissa Haertle
- Institute of Human Genetics, University of Würzburg, Würzburg, Germany
| | - Tamara Schneider
- Institute of Human Genetics, University of Würzburg, Würzburg, Germany
| | - Andrea Gehrig
- Institute of Human Genetics, University of Würzburg, Würzburg, Germany
| | - Jörg Schröder
- Institute of Human Genetics, University of Würzburg, Würzburg, Germany
| | - Simone Rost
- Institute of Human Genetics, University of Würzburg, Würzburg, Germany
| | - Beat Wolf
- University of Applied Sciences Western Switzerland, Fribourg, Switzerland.,Department of Bioinformatics, University of Würzburg, Würzburg, Germany
| | - Claus R Bartram
- Institute of Human Genetics, University Hospital, Heidelberg, Germany
| | - Christian Sutter
- Institute of Human Genetics, University Hospital, Heidelberg, Germany
| | - Thomas Haaf
- Institute of Human Genetics, University of Würzburg, Würzburg, Germany
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10
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Haertle L, Maierhofer A, Böck J, Lehnen H, Böttcher Y, Blüher M, Schorsch M, Potabattula R, El Hajj N, Appenzeller S, Haaf T. Hypermethylation of the non-imprinted maternal MEG3 and paternal MEST alleles is highly variable among normal individuals. PLoS One 2017; 12:e0184030. [PMID: 28854270 PMCID: PMC5576652 DOI: 10.1371/journal.pone.0184030] [Citation(s) in RCA: 11] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 08/16/2017] [Indexed: 01/09/2023] Open
Abstract
Imprinted genes show parent-specific activity (functional haploidy), which makes them particularly vulnerable to epigenetic dysregulation. Here we studied the methylation profiles of oppositely imprinted genes at single DNA molecule resolution by two independent parental allele-specific deep bisulfite sequencing (DBS) techniques. Using Roche (GSJunior) next generation sequencing technology, we analyzed the maternally imprinted MEST promoter and the paternally imprinted MEG3 intergenic (IG) differentially methylated region (DMR) in fetal cord blood, adult blood, and visceral adipose tissue. Epimutations were defined as paternal or maternal alleles with >50% aberrantly (de)methylated CpG sites, showing the wrong methylation imprint. The epimutation rates (range 2–66%) of the paternal MEST and the maternal MEG3 IG DMR allele, which should be completely unmethylated, were significantly higher than those (0–15%) of the maternal MEST and paternal MEG3 alleles, which are expected to be fully methylated. This hypermethylation of the non-imprinted allele (HNA) was independent of parental origin. Very low epimutation rates in sperm suggest that HNA occurred after fertilization. DBS with Illumina (MiSeq) technology confirmed HNA for the MEST promoter and the MEG3 IG DMR, and to a lesser extent, for the paternally imprinted secondary MEG3 promoter and the maternally imprinted PEG3 promoter. HNA leads to biallelic methylation of imprinted genes in a considerable proportion of normal body cells (somatic mosaicism) and is highly variable between individuals. We propose that during development and differentiation maintenance of differential methylation at most imprinting control regions may become to some extent redundant. The accumulation of stochastic and environmentally-induced methylation errors on the non-imprinted allele may increase epigenetic diversity between cells and individuals.
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Affiliation(s)
- Larissa Haertle
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Anna Maierhofer
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Julia Böck
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Harald Lehnen
- Department of Gynecology and Obstetrics, Municipal Clinics, Mönchengladbach, Germany
| | - Yvonne Böttcher
- Integrated Research and Treatment Center (IFB) Adiposity Diseases, Leipzig, Germany
- Institute of Clinical Medicine, University of Oslo, Lørenskog, Norway
| | - Matthias Blüher
- Integrated Research and Treatment Center (IFB) Adiposity Diseases, Leipzig, Germany
| | | | - Ramya Potabattula
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Nady El Hajj
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Silke Appenzeller
- Core Unit Systems Medicine, Julius Maximilians University, Würzburg, Germany
- Comprehensive Cancer Center Mainfranken, Julius Maximilians University, Würzburg, Germany
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
- * E-mail:
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11
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Tiedt S, Prestel M, Malik R, Schieferdecker N, Duering M, Kautzky V, Stoycheva I, Böck J, Northoff BH, Klein M, Dorn F, Krohn K, Teupser D, Liesz A, Plesnila N, Holdt LM, Dichgans M. RNA-Seq Identifies Circulating miR-125a-5p, miR-125b-5p, and miR-143-3p as Potential Biomarkers for Acute Ischemic Stroke. Circ Res 2017; 121:970-980. [PMID: 28724745 DOI: 10.1161/circresaha.117.311572] [Citation(s) in RCA: 173] [Impact Index Per Article: 24.7] [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: 06/28/2017] [Revised: 07/14/2017] [Accepted: 07/18/2017] [Indexed: 01/22/2023]
Abstract
RATIONALE Currently, there are no blood-based biomarkers with clinical utility for acute ischemic stroke (IS). MicroRNAs show promise as disease markers because of their cell type-specific expression patterns and stability in peripheral blood. OBJECTIVE To identify circulating microRNAs associated with acute IS, determine their temporal course up to 90 days post-stroke, and explore their utility as an early diagnostic marker. METHODS AND RESULTS We used RNA sequencing to study expression changes of circulating microRNAs in a discovery sample of 20 patients with IS and 20 matched healthy control subjects. We further applied quantitative real-time polymerase chain reaction in independent samples for validation (40 patients with IS and 40 matched controls), replication (200 patients with IS, 100 healthy control subjects), and in 72 patients with transient ischemic attacks. Sampling of patient plasma was done immediately upon hospital arrival. We identified, validated, and replicated 3 differentially expressed microRNAs, which were upregulated in patients with IS compared with both healthy control subjects (miR-125a-5p [1.8-fold; P=1.5×10-6], miR-125b-5p [2.5-fold; P=5.6×10-6], and miR-143-3p [4.8-fold; P=7.8×10-9]) and patients with transient ischemic attack (miR-125a-5p: P=0.003; miR-125b-5p: P=0.003; miR-143-3p: P=0.005). Longitudinal analysis of expression levels up to 90 days after stroke revealed a normalization to control levels for miR-125b-5p and miR-143-3p starting at day 2 while miR-125a-5p remained elevated. Levels of all 3 microRNAs depended on platelet numbers in a platelet spike-in experiment but were unaffected by chemical hypoxia in Neuro2a cells and in experimental stroke models. In a random forest classification, miR-125a-5p, miR-125b-5p, and miR-143-3p differentiated between healthy control subjects and patients with IS with an area under the curve of 0.90 (sensitivity: 85.6%; specificity: 76.3%), which was superior to multimodal cranial computed tomography obtained for routine diagnostics (sensitivity: 72.5%) and previously reported biomarkers of acute IS (neuron-specific enolase: area under the curve=0.69; interleukin 6: area under the curve=0.82). CONCLUSIONS A set of circulating microRNAs (miR-125a-5p, miR-125b-5p, and miR-143-3p) associates with acute IS and might have clinical utility as an early diagnostic marker.
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Affiliation(s)
- Steffen Tiedt
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Matthias Prestel
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Rainer Malik
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Nicola Schieferdecker
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Marco Duering
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Veronika Kautzky
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Ivelina Stoycheva
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Julia Böck
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Bernd H Northoff
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Matthias Klein
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Franziska Dorn
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Knut Krohn
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Daniel Teupser
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Arthur Liesz
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Nikolaus Plesnila
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Lesca Miriam Holdt
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.)
| | - Martin Dichgans
- From the Institute for Stroke and Dementia Research, Klinikum der Universität München (S.T., M.P., R.M., N.S., M.D., V.K., I.S., J.B., A.L., N.P., M.D.), Graduate School of Systemic Neurosciences (S.T.), Institute of Laboratory Medicine, Klinikum der Universität München (B.H.N., D.T., L.M.H.), Department of Neurology, Klinikum der Universität München (M.K.), and Department of Neuroradiology, Klinikum der Universität München (F.D.), Ludwig-Maximilians-Universität LMU, Germany; Munich Cluster for Systems Neurology (SyNergy), Germany (S.T., A.L., N.P., M.D.); and Interdisciplinary Center for Clinical Research (IZKF), University of Leipzig, Germany (K.K.).
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12
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El Hajj N, Dittrich M, Böck J, Kraus TFJ, Nanda I, Müller T, Seidmann L, Tralau T, Galetzka D, Schneider E, Haaf T. Epigenetic dysregulation in the developing Down syndrome cortex. Epigenetics 2016; 11:563-78. [PMID: 27245352 PMCID: PMC4990229 DOI: 10.1080/15592294.2016.1192736] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 05/12/2016] [Accepted: 05/17/2016] [Indexed: 12/18/2022] Open
Abstract
Using Illumina 450K arrays, 1.85% of all analyzed CpG sites were significantly hypermethylated and 0.31% hypomethylated in fetal Down syndrome (DS) cortex throughout the genome. The methylation changes on chromosome 21 appeared to be balanced between hypo- and hyper-methylation, whereas, consistent with prior reports, all other chromosomes showed 3-11 times more hyper- than hypo-methylated sites. Reduced NRSF/REST expression due to upregulation of DYRK1A (on chromosome 21q22.13) and methylation of REST binding sites during early developmental stages may contribute to this genome-wide excess of hypermethylated sites. Upregulation of DNMT3L (on chromosome 21q22.4) could lead to de novo methylation in neuroprogenitors, which then persists in the fetal DS brain where DNMT3A and DNMT3B become downregulated. The vast majority of differentially methylated promoters and genes was hypermethylated in DS and located outside chromosome 21, including the protocadherin gamma (PCDHG) cluster on chromosome 5q31, which is crucial for neural circuit formation in the developing brain. Bisulfite pyrosequencing and targeted RNA sequencing showed that several genes of PCDHG subfamilies A and B are hypermethylated and transcriptionally downregulated in fetal DS cortex. Decreased PCDHG expression is expected to reduce dendrite arborization and growth in cortical neurons. Since constitutive hypermethylation of PCDHG and other genes affects multiple tissues, including blood, it may provide useful biomarkers for DS brain development and pharmacologic targets for therapeutic interventions.
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Affiliation(s)
- Nady El Hajj
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Marcus Dittrich
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
- Department of Bioinformatics, Julius Maximilians University, Würzburg, Germany
| | - Julia Böck
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Theo F. J. Kraus
- Center for Neuropathology and Prion Research, Ludwig Maximilians University, Munich, Germany
| | - Indrajit Nanda
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Tobias Müller
- Department of Bioinformatics, Julius Maximilians University, Würzburg, Germany
| | - Larissa Seidmann
- Department of Pathology, University Medical Center, Mainz, Germany
| | - Tim Tralau
- Rehabilitation Clinic for Children and Adolescents, Westerland/Sylt, Germany
| | - Danuta Galetzka
- Department of Radiation Oncology and Radiotherapy, University Medical Center, Mainz, Germany
| | - Eberhard Schneider
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
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13
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Schneider E, Dittrich M, Böck J, Nanda I, Müller T, Seidmann L, Tralau T, Galetzka D, El Hajj N, Haaf T. CpG sites with continuously increasing or decreasing methylation from early to late human fetal brain development. Gene 2016; 592:110-118. [PMID: 27468947 DOI: 10.1016/j.gene.2016.07.058] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 06/28/2016] [Accepted: 07/23/2016] [Indexed: 01/03/2023]
Abstract
Normal human brain development is dependent on highly dynamic epigenetic processes for spatial and temporal gene regulation. Recent work identified wide-spread changes in DNA methylation during fetal brain development. We profiled CpG methylation in frontal cortex of 27 fetuses from gestational weeks 12-42, using Illumina 450K methylation arrays. Sites showing genome-wide significant correlation with gestational age were compared to a publicly available data set from gestational weeks 3-26. Altogether, we identified 2016 matching developmentally regulated differentially methylated positions (m-dDMPs): 1767m-dDMPs were hypermethylated and 1149 hypomethylated during fetal development. M-dDMPs are underrepresented in CpG islands and gene promoters, and enriched in gene bodies. They appear to cluster in certain chromosome regions. M-dDMPs are significantly enriched in autism-associated genes and CpGs. Our results promote the idea that reduced methylation dynamics during fetal brain development may predispose to autism. In addition, m-dDMPs are enriched in genes with human-specific brain expression patterns and/or histone modifications. Collectively, we defined a subset of dDMPs exhibiting constant methylation changes from early to late pregnancy. The same epigenetic mechanisms involving methylation changes in cis-regulatory regions may have been adopted for human brain evolution and ontogeny.
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Affiliation(s)
- Eberhard Schneider
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Marcus Dittrich
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany; Department of Bioinformatics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Julia Böck
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Indrajit Nanda
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Tobias Müller
- Department of Bioinformatics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Larissa Seidmann
- Department of Pathology, University Medical Center, 55131 Mainz, Germany
| | - Tim Tralau
- Department of Pathology, University Medical Center, 55131 Mainz, Germany; Rehabilitation Clinic for Children and Adolescents, 25980 Westerland/Sylt, Germany
| | - Danuta Galetzka
- Department of Radiation Oncology and Radiotherapy, University Medical Center, 55131 Mainz, Germany
| | - Nady El Hajj
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany.
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Hlawatsch J, Karlstetter M, Aslanidis A, Lückoff A, Walczak Y, Plank M, Böck J, Langmann T. Sterile alpha motif containing 7 (samd7) is a novel crx-regulated transcriptional repressor in the retina. PLoS One 2013; 8:e60633. [PMID: 23565263 PMCID: PMC3615016 DOI: 10.1371/journal.pone.0060633] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [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: 05/18/2012] [Accepted: 03/01/2013] [Indexed: 11/18/2022] Open
Abstract
Inherited retinal diseases are mainly caused by mutations in genes that are highly expressed in photoreceptors of the retina. The majority of these genes is under the control of the transcription factor Cone rod homeobox (Crx), that acts as a master transcription factor in photoreceptors. Using a genome-wide chromatin immunoprecipitation dataset that highlights all potential in vivo targets of Crx, we have identified a novel sterile alpha motif (SAM) domain containing protein, Samd7. mRNA Expression of Samd7 was confined to the late postnatal and adult mouse retina as well as the pineal gland. Using immunohistochemistry and Western blot, we could detect Samd7 protein in the outer nuclear layer of adult mouse retina. Ectopic over-expression in HEK293 cells demonstrated that Samd7 resides in the cytoplasm as well as the nucleus. In vitro electroporation of fluorescent reporters into living mouse retinal cultures revealed that transcription of the Samd7 gene depends on evolutionary conserved Crx motifs located in the first intron enhancer. Moreover, Crx knock-down with shRNA strongly reduced Samd7 reporter activity and endogenous Samd7 protein, indicating that Crx is required for retinal expression of Samd7. Finally, using co-transfections in luciferase reporter assays we found that Samd7 interferes with Crx-dependent transcription. Samd7 suppressed luciferase activity from a reporter plasmid with five Crx consensus repeats in a dose dependent manner and reduced Crx-mediated transactivation of regulatory sequences in the retinoschisin gene and the Samd7 gene itself. Taken together, we have identified a novel retinal SAM domain protein, Samd7, which could act as a transcriptional repressor involved in fine-tuning of Crx-regulated gene expression.
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Affiliation(s)
- Julia Hlawatsch
- Institute of Human Genetics, University of Regensburg, Regensburg, Germany
| | - Marcus Karlstetter
- Institute of Human Genetics, University of Regensburg, Regensburg, Germany
- Department of Ophthalmology, University of Cologne, Cologne, Germany
| | - Alexander Aslanidis
- Institute of Human Genetics, University of Regensburg, Regensburg, Germany
- Department of Ophthalmology, University of Cologne, Cologne, Germany
| | - Anika Lückoff
- Department of Ophthalmology, University of Cologne, Cologne, Germany
| | - Yana Walczak
- Institute of Human Genetics, University of Regensburg, Regensburg, Germany
- Department of Ophthalmology, University of Cologne, Cologne, Germany
| | - Michael Plank
- Institute of Human Genetics, University of Regensburg, Regensburg, Germany
| | - Julia Böck
- Institute of Human Genetics, University of Regensburg, Regensburg, Germany
| | - Thomas Langmann
- Institute of Human Genetics, University of Regensburg, Regensburg, Germany
- Department of Ophthalmology, University of Cologne, Cologne, Germany
- * E-mail:
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15
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Van De Flierdt E, Dropmann A, Böck J, Spelsberg F, Fürst H. [Primary hyperparathyroidism: parathyroid scintigraphy and ultrasound in problem patients]. Chirurg 2004; 75:794-8. [PMID: 15007528 DOI: 10.1007/s00104-004-0827-7] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
AIM In a retrospective study, the sensitivity of parathyroid scintigraphy and ultrasound was investigated in patients with primary hyperparathyroidism (HPT) with prior histories of surgery of the thyroid or parathyroid (unsuccessful or recidive). METHODS Preoperative ultrasound and parathyroid scintigraphy were performed on 65 patients who had had successful surgery and on 12 who had had unsuccessful surgery. The scintigraphy was carried out using a combined double phase/double nuclide technique with 300-600 MBq 99mTc-sestamibi for parathyroid imaging and 80-100 MBq 99mTc-pertechnetate for thyroid imaging. RESULTS The sensitivity of parathyroid scintigraphy was 86% in patients with normal thyroid glands, 77% in those with recurrent goiter, and 62% in those with recurrent or persistent HPT. The ultrasound sensitivity was 86%, 50%, and 57% respectively. CONCLUSION The sensitivity of parathyroid scintigraphy and ultrasound decreases considerably after surgery. That of parathyroid scintigraphy lay significantly below results published to date. However, parathyroid scintigraphy should be performed precisely in these cases, because the number of alternative parathyroid imaging methods aside from ultrasound are limited.
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16
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Hosten N, Gutberlet M, Kühne T, Oellinger H, Vogel M, Böckel T, Böck J, Frank J. [Cardiac MR flowmetry: experimental validation and results in patients with operated heart defects]. ROFO-FORTSCHR RONTG 1998; 168:480-7. [PMID: 9617365 DOI: 10.1055/s-2007-1015165] [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
PURPOSE A flow-sensitive MR sequence (phase-contrast technique) was evaluated in phantom studies with regard to factors influencing measurements and correctness of results. The sequence was additionally used for functional evaluation of operated congenital heart disease. METHODS Pulsatile and constant flow were produced with the help of a phantom. Influence of angulation, range and vessel bending was evaluated. An examination protocol was developed from the results. 35 patients with surgically repaired congenital heart disease or without repair were examined. RESULTS A range preset below the actual flow velocity as well as angulation of more than 20 degrees were isolated as main pitfalls in MR flowmetry. In addition to morphological MR findings flow measurements were possible in 11 patients at vessel sites which were not or not completely suited for examination by Doppler ultrasound. CONCLUSION The evaluated phase-contrast technique allows for fast and reliable flow quantification if the influences identified in phantom studies are considered.
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Affiliation(s)
- N Hosten
- Strahlenklinik und Poliklinik, Virchow-Klinikum der Humboldt Universität zu Berlin
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17
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Abstract
A planar array of microelectrodes has been developed for monitoring the electrical activity of neurons in cell culture. The microelectrode array was tested and characterized using impedance measurements and SEM. To verify the spatial sensitivity of the microelectrodes we used a specially developed simulation device.
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Affiliation(s)
- W Nisch
- Naturwissenschaftliches und Medizinisches Institut, Universität Tübingen in Reutlingen, Germany
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18
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Böck J, Heilbron DC, Hoeft A, Korb H, Hellige G. No pulmonary edema or congestion after central venous injection of conventional and newer contrast media in dogs. Invest Radiol 1988; 23:836-41. [PMID: 3209383 DOI: 10.1097/00004424-198811000-00007] [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: 01/04/2023]
Abstract
Our aim was to determine whether large central venous doses of ionic diatrizoate, nonionic iopromide, or nonionic iotrolane produce pulmonary edema or pulmonary congestion in dogs. Eighteen dogs (six per group) anesthetized with piritramide and N2O received three sequential doses (1.5 mL/kg body weight) of one contrast medium in less than 20 seconds. Before the first injection, and again 1, 5, 10, 20, and 30 minutes after each contrast injection, extravascular lung water, pulmonary blood volume, and cardiac output were determined by thermal-dye dilution. Neither extravascular lung water nor pulmonary blood volume increased after any contrast medium. Pulmonary blood volume and cardiac output decreased slightly but not significantly after all contrast media during the course of the study. We conclude that diatrizoate, iopromide, or iotrolane do not produce pulmonary edema or congestion in dogs.
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Affiliation(s)
- J Böck
- Zentrum Physiologie und Pathophysiologie, Universität Göttingen, West Germany
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19
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Böck J, Deuflhard P, Hoeft A, Korb H, Wolpers HG, Steinmann J, Hellige G. Thermal recovery after passage of the pulmonary circulation assessed by deconvolution. J Appl Physiol (1985) 1988; 64:1210-6. [PMID: 3284869 DOI: 10.1152/jappl.1988.64.3.1210] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
For indicator-dilution studies, complete thermal recovery after passage of heat through the pulmonary circulation would be desirable. However, the results in the literature obtained by extrapolation techniques are inconsistent. To overcome problems of the extrapolation approach, transport functions of the pulmonary circulation (including the left heart) were computed by deconvolution of pulmonary arterial and aortic pairs of thermodilution curves after central venous indicator injection (10 ml of an ice-cold blood indocyanine green dye mixture). Thermal recovery was determined as the finite integral of the transport function. Thirteen mongrel dogs under piritramid-N2O anesthesia were examined under base-line conditions, in orthostasis to alter the distribution of pulmonary blood flow (9 dogs), and in oleic acid edema (8 dogs). Using the deconvolution approach, thermal recovery was 0.97 +/- 0.04 under base-line conditions, 0.96 +/- 0.03 in orthostasis, and 0.96 +/- 0.05 in pulmonary edema. Thermal recovery determined from extrapolated dilution curves was greater than 100% in all groups, a physically impossible finding. It is concluded that thermal recovery is incomplete but insensitive with respect to the distribution of blood flow and to the size of the extravascular compartment. Monoexponential extrapolation is unsuited for the determination of thermal recovery.
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Affiliation(s)
- J Böck
- Zentrum Physiologie und Phatophysiologie, Universität Göttingen, Federal Republic of Germany
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20
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Böck J, Heidelmeyer C, Gersing E, Pahl R, Hellige G. Simultaneous fiberoptic detection of the kinetics of heavy water and indocyanine green dye in arterial vessels. BIOMED ENG-BIOMED TE 1988; 33:6-9. [PMID: 2833947 DOI: 10.1515/bmte.1988.33.1-2.6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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21
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Böck J, Hellige G. Application of an optimal filter to the fast Fourier transform deconvolution problem for on-line analysis of pairs of transpulmonary indicator dilution curves. BIOMED ENG-BIOMED TE 1987; 32:241-6. [PMID: 3689864 DOI: 10.1515/bmte.1987.32.10.241] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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22
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Wolpers HG, Böck J, Hoeft A, Korb H, Hellige G. [Measuring coronary circulation using an inert gas method--a comparison of common indicator gases]. Z Kardiol 1987; 76:95-101. [PMID: 3033924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Validation studies of inert gas techniques are limited in number and usually have not included circumstances with marked heterogeneity of flow. This study was intended to investigate the validity of the method in experimental animals under various hemodynamic conditions by parallel application of helium, argon, krypton and xenon as indicators and by comparison with direct flow measurements. Gases were applied by single breath inhalation. In order to avoid the limitations of conventional methods arising from the systemic recirculation of tracer and from shortened measuring periods we used continuous mass spectrometric recording and numeric deconvolution of the dilution curves in arterial and coronary venous blood. When the transit times are evaluated by "stochastic" analysis and commonly used tissue/blood partition-coefficients (lambda He = 0.95, lambda Ar = 1.1) the helium and argon values are found in reasonable agreement with reference flows. The effects of a shortening of measurements that are based on single integrated samples (Argon method) are shown under control conditions, adenosin infusion and elevated ventricular filling pressure. With xenon (lambda Xe = 0.7) coronary blood flow above 100 ml/min X 100 g is underestimated by the "stochastic" and by the "initial slope technique"; parallel measurements with argon suggest that in the initial slope technique a lambda Xe between 0.8 and 0.9 might be more adequate.
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Abstract
UNLABELLED In patients undergoing thoracic surgery central blood volume is subject to large variations and extravascular lung water may change critically due to fluid shifts. Therefore, an accurate monitoring of these parameters, in particular under perioperative conditions, seems to be desirable. This study describes an improved method for the measurement of intrathoracic volumes. Experiments were carried our in 9 mongrel dogs under piritramide-N2O anesthesia. In order to produce low cardiac output in combination with uneven distribution of perfusion, measurements were performed under base line conditions and after postural changes. Indicators (cold and indocyanine green dye) were injected into the v. cava and indicator kinetics were recorded from the pulmonary artery and aorta using thermistor-fiberoptic catheters. The transport functions of cold and dye were computed from the corresponding pairs of dilution curves. From the transport functions, the mean transit times of the intravascular (dye) and diffusible (cold) indicator were determined. Central blood volume and extravascular lung thermal volume were calculated from the mean transit times and a thermodilution cardiac output. RESULTS Under base line conditions, central blood volume was 15.3 +/- 2.5 ml/kg body weight. In orthostasis, a significant and reversible reduction to 11.6 +/- 2.4 ml/kg body weight was found. Cardiac output fell significantly from 3.3 +/- 0.5 to 2.4 +/- 1.1. l/min. In contrast, the slight decrease of extravascular lung thermal volume was not statistically significant. It is concluded that the method presented is sensitive enough to detect even small changes of central blood volume.(ABSTRACT TRUNCATED AT 250 WORDS)
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Steinmann J, Böck J, Hoeft A, Korb H, Wolpers HG, Hellige G. [In vitro measurement of the oxygen saturation of the blood with quartz fiber optics and an optical multichannel analyzer]. BIOMED ENG-BIOMED TE 1986; 31:246-51. [PMID: 3790683 DOI: 10.1515/bmte.1986.31.10.246] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Hoeft A, Korb H, Böck J, Wolpers HG, Wober W, Hellige G. Preservation of myocardium in transient ischemia by the thromboxane synthetase inhibitor UK 38.485. Res Exp Med (Berl) 1986; 186:35-46. [PMID: 3961276 DOI: 10.1007/bf01851832] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
This study was performed to examine potential protective effects of UK 38.485, an inhibitor of thromboxane synthetase, in canine myocardium stressed by transient ischemia. On anesthetized open-chest mongrel-dogs (n = 9) repeated ischemia (3 min) was produced by proximal, intermittent occlusion of the left anterior descending artery. A total of 18 occlusions after 3 mg UK 38.485/kg body wt. and 12 occlusions after 5 mg UK 38.485/kg body wt. were compared to a total of 24 occlusions under control conditions. In each experiment, 2-3 control occlusions and 3-4 therapy occlusions were performed. The drug was applied i.v. in a dose of 3 or 5 mg/body wt. 30 min before the first therapy occlusion. In both groups, hemodynamics and energetics did not significantly change as compared to control. The efficiency of the drug in protecting ischemically stressed myocardium was examined by (a) quantification of oxygen debt and oxygen repayment in the occlusion and reperfusion periods and (b) the amounts of inorganic phosphate, lactate, and potassium released in the first minute of reperfusion. Compared to control occlusions, premedication with either 3 or 5 mg UK 38.485 led to a significantly reduced oxygen debt combined with a significant decrease of the release of inorganic phosphate, lactate, and potassium. The protective effect is suggested to be mainly due to enhanced flow to ischemic areas. Data obtained in this study suggest protective effects of the compound in the preservation of myocardium in transient ischemia and attest to the concept that thromboxane A2 may aggravate the metabolic and energetic situation of myocardium in circumstances with reduced oxygen supply.
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26
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Böck J. [Words of remembrance on the occasion of Prof. Karl Lindner's 100th birthday]. Wien Med Wochenschr 1983; 133:212-3. [PMID: 6346698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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27
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Böck J, Gritzner G. Gibbs Free Energies of Transfer and Redox Behaviour of Cations in N,N-Diethylacetamide and N,N-Dimethylformamide. ACTA ACUST UNITED AC 1982. [DOI: 10.1524/zpch.1982.130.2.181] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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28
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Böck J. [Bertha Anna Klien]. Klin Monbl Augenheilkd 1979; 175:430-1. [PMID: 393904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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29
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Böck J, Gebhart W. [Small granules in epithelial cells of human cornea (author's transl)]. Albrecht Von Graefes Arch Klin Exp Ophthalmol 1973; 189:43-54. [PMID: 4544171 DOI: 10.1007/bf00411124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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30
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Böck J, Feyrter F. [Desmoplasia of the myothelium in so-called mixed tumours]. Wien Klin Wochenschr 1973; 85:138-42. [PMID: 4347886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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31
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Böck J, Fanta D, Söltz-Szöts J, Zehetbauer G, Gebhart W. [Isolation of herpes simplex virus from the aqueous humour of an eye affected by relapsing iridocyclitis]. Albrecht Von Graefes Arch Klin Exp Ophthalmol 1972; 185:349-53. [PMID: 4344953 DOI: 10.1007/bf00410767] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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32
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Heinsius E, Böck J. [Development of drug therapy on eyes during the past 100 years]. Med Monatsschr 1971; 25:443-7. [PMID: 4941491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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33
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Böck J. [70th birthday of Prof. Dr. Stefan Wolfram]. Wien Klin Wochenschr 1971; 83:313. [PMID: 4930840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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34
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Böck J. [In memoriam Professor Dr. Svetozar Postic]. Klin Monbl Augenheilkd 1971; 158:455-6. [PMID: 4929807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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35
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Böck J. [Friedrich Feyrter on his 75th birthday]. Wien Klin Wochenschr 1971; 83:21. [PMID: 4925744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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36
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Feyrter F, Böck J. [Relationship between cutaneous and conjunctival nevi and choroid melanoma. 3. Cell condition of mixed cell melanoma of the uvea on swabs and smears]. Albrecht Von Graefes Arch Klin Exp Ophthalmol 1970; 179:199-214. [PMID: 5315963 DOI: 10.1007/bf00410853] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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37
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38
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39
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40
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Böck J. [Dr. Peter Clemens Kronfeld on his 70th birthday]. Wien Klin Wochenschr 1969; 81:656-7. [PMID: 4900561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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41
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Böck J. [Professor Dr. J. Meller]. Wien Klin Wochenschr 1969; 81:93-5. [PMID: 4891224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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42
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Feyrter F, Böck J. [On the interdependence of cutaneous and conjunctival nevi and choriodal melanoma. II. The nevus of the conjunctiva and the caruncle]. Albrecht Von Graefes Arch Klin Exp Ophthalmol 1969; 178:67-71. [PMID: 4185504 DOI: 10.1007/bf00428046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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43
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Böck J, Feyrter F. [On the intedependence of cutaneous and conjunctival nevi and choroidal melanoma. I. The cutaneous nevus--especially that of the palpebra]. Albrecht Von Graefes Arch Klin Exp Ophthalmol 1969; 178:51-66. [PMID: 4185503 DOI: 10.1007/bf00428045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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44
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Böck J, Feyrter F. [On the intercellular interstitium of the so-called mixed lacrimal gland tumor]. Doc Ophthalmol 1968; 24:275-88. [PMID: 4177703 DOI: 10.1007/bf02550943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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45
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Böck J. [Simple procedure to reduce the size of blind, ectatic eyeball]. Klin Monbl Augenheilkd 1968; 153:169-73. [PMID: 5696682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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46
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Böck J. [In memoriam Adolf Franceschetti]. Albrecht Von Graefes Arch Klin Exp Ophthalmol 1968; 175:283-4. [PMID: 4876573 DOI: 10.1007/bf02440003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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47
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Böck J, Feyrter F. [Studies on the store of cells in the idiopathic so-called lymphoma of the conjunctiva]. Albrecht Von Graefes Arch Klin Exp Ophthalmol 1968; 175:68-74. [PMID: 5303802 DOI: 10.1007/bf00411424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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48
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Böck J. [Professor Dr. Anton Musger on the 70th birthday]. Wien Klin Wochenschr 1968; 80:237-8. [PMID: 4882342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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49
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Böck J. [The Kraupa rotation technic as a surgical preparation for effective partial cornea transplantation]. Wien Klin Wochenschr 1967; 79:458-60. [PMID: 4869918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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50
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Böck J, Zischka-Konorsa W. [Nuclear polymorphism and the Busse-Grawitz theory of inflammation]. Doc Ophthalmol 1966; 20:278-89. [PMID: 5982266 DOI: 10.1007/bf00165423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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