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Seitz V, Gennermann K, Elezkurtaj S, Groth D, Schaper S, Dröge A, Lachmann N, Berg E, Lenze D, Kühl AA, Husemann C, Kleo K, Horst D, Lennerz V, Hennig S, Hummel M, Schumann M. Specific T-cell receptor beta-rearrangements of gluten-triggered CD8 + T-cells are enriched in celiac disease patients' duodenal mucosa. Clin Immunol 2023; 256:109795. [PMID: 37769786 DOI: 10.1016/j.clim.2023.109795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 09/12/2023] [Accepted: 09/25/2023] [Indexed: 10/02/2023]
Abstract
Celiac disease (CeD) is an autoimmune disorder affecting the small intestine with gluten as disease trigger. Infections including Influenza A, increase the CeD risk. While gluten-specific CD4+ T-cells, recognizing HLA-DQ2/DQ8 presented gluten-peptides, initiate and sustain the celiac immune response, CD8+ α/β intraepithelial T-cells elicit mucosal damage. Here, we subjected TCRs from a cohort of 56 CeD patients and 22 controls to an analysis employing 749 published CeD-related TCRβ-rearrangements derived from gluten-specific CD4+ T-cells and gluten-triggered peripheral blood CD8+ T-cells. We show, that in addition to TCRs from gluten-specific CD4+ T-cells, TCRs of gluten-triggered CD8+ T-cells are significantly enriched in CeD duodenal tissue samples. TCRβ-rearrangements of gluten-triggered CD8+ T-cells were even more expanded in patients than TCRs from gluten-specific CD4+ T-cells (p < 0.0002) and highest in refractory CeD. Sequence alignments with TCR-antigen databases suggest that a subgroup of these most likely indirectly gluten-triggered TCRs recognize microbial, viral, and autoantigens.
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Affiliation(s)
- V Seitz
- Institute of Pathology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; HS Diagnomics GmbH, Berlin, Germany
| | | | - S Elezkurtaj
- Institute of Pathology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - D Groth
- Bioinformatics, Institute of Biochemistry and Biology, University of Potsdam, Potsdam, Germany
| | | | - A Dröge
- HS Diagnomics GmbH, Berlin, Germany
| | - N Lachmann
- Centre for Tumor Medicine, Histocompatibility & Immunogenetics Laboratory, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - E Berg
- Institute of Pathology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - D Lenze
- Institute of Pathology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - A A Kühl
- iPATH.Berlin - Core Unit of the Charité Universitätsmedizin Berlin, corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - C Husemann
- Institute of Pathology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; German Cancer Consortium (DKTK), Partner Site Berlin, Berlin, Germany; German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - K Kleo
- Institute of Pathology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - D Horst
- Institute of Pathology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | | | - S Hennig
- HS Diagnomics GmbH, Berlin, Germany
| | - M Hummel
- Institute of Pathology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; German Cancer Consortium (DKTK), Partner Site Berlin, Berlin, Germany; German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - M Schumann
- Medizinische Klinik m. S. Gastroenterologie, Infektiologie und Rheumatologie, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.
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2
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Banerjee A, Lesser O, Rahman MA, Thomas C, Wang T, Manfra MJ, Berg E, Oreg Y, Stern A, Marcus CM. Local and Nonlocal Transport Spectroscopy in Planar Josephson Junctions. Phys Rev Lett 2023; 130:096202. [PMID: 36930915 DOI: 10.1103/physrevlett.130.096202] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 01/11/2023] [Indexed: 06/18/2023]
Abstract
We report simultaneously acquired local and nonlocal transport spectroscopy in a phase-biased planar Josephson junction based on an epitaxial InAs-Al hybrid two-dimensional heterostructure. Quantum point contacts at the junction ends allow measurement of the 2×2 matrix of local and nonlocal tunneling conductances as a function of magnetic field along the junction, phase difference across the junction, and carrier density. A closing and reopening of a gap was observed in both the local and nonlocal tunneling spectra as a function of magnetic field. For particular tunings of junction density, gap reopenings were accompanied by zero-bias conductance peaks (ZBCPs) in local conductances. End-to-end correlation of gap reopening was strong, while correlation of local ZBCPs was weak. A model of the device, with disorder treated phenomenologically, shows comparable conductance matrix behavior associated with a topological phase transition. Phase dependence helps distinguish possible origins of the ZBCPs.
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Affiliation(s)
- A Banerjee
- Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
| | - O Lesser
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel 76100
| | - M A Rahman
- Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
| | - C Thomas
- Department of Physics and Astronomy, and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907 USA
| | - T Wang
- Department of Physics and Astronomy, and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907 USA
| | - M J Manfra
- Department of Physics and Astronomy, and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907 USA
- School of Materials Engineering, and School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907 USA
| | - E Berg
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel 76100
| | - Y Oreg
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel 76100
| | - Ady Stern
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel 76100
| | - C M Marcus
- Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
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3
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Levesque T, Perzo N, Berg E, Dovonou E, Messaoudi H, Herbet A, Colleville B, Eltchaninoff H, Boquet D, Richard V, Bellien J, Durand E. Evaluation of the role of endothelin in aortic stenosis. Archives of Cardiovascular Diseases Supplements 2023. [DOI: 10.1016/j.acvdsp.2022.10.149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Rodler S, Kopliku R, Tamalunas A, Goetz M, Berg E, Staehler M, Causcuelli J. Outcomes of patients with discontinuation of immunotherapy due to immune related adverse events (irAE). EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)02549-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Staudacher JJ, Arnold A, Kühl AA, Pötzsch M, Daum S, Winterfeld M, Berg E, Hummel M, Rau B, Stein U, Treese C. Prognostic impact of activin subunit inhibin beta A in gastric and esophageal adenocarcinomas. BMC Cancer 2022; 22:953. [PMID: 36064338 PMCID: PMC9446826 DOI: 10.1186/s12885-022-10016-5] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 08/19/2022] [Indexed: 11/10/2022] Open
Abstract
PURPOSE Adenocarcinomas of the esophagus (AEG) and stomach (AS) are among the most common cancers worldwide. Novel markers for risk stratification and guiding treatment are strongly needed. Activin is a multi-functional cytokine with context specific pro- and anti-tumorigenic effects. We aimed to investigate the prognostic role of activin tumor protein expression in AEG/ASs. METHODS Tissue from a retrospective cohort of 277 patients with AEG/AS treated primarily by surgery at the Charité - Universitätsmedizin Berlin was collected and analyzed by immunohistochemistry using a specific antibody to the activin homodimer inhibin beta A. Additionally, we evaluated T-cell infiltration and PD1 expression as well as expression of PD-L1 by immunohistochemistry as possible confounding factors. Clinico-pathologic data were collected and correlated with activin protein expression. RESULTS Out of 277 tumor samples, 72 (26.0%) exhibited high activin subunit inhibin beta A protein expression. Higher expression was correlated with lower Union for International Cancer Control (UICC) stage and longer overall survival. Interestingly, activin subunit expression correlated with CD4+ T-cell infiltration, and the correlation with higher overall survival was exclusively seen in tumors with high CD4+ T-cell infiltration, pointing towards a role of activin in the tumor immune response in AEG/ASs. CONCLUSION In our cohort of AEG/AS, higher activin subunit levels were correlated with longer overall survival, an effect exclusively seen in tumors with high CD4+ cell infiltration. Further mechanistic research is warranted discerning the exact effect of this context specific cytokine.
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Affiliation(s)
- J J Staudacher
- Medical Department, Division of Gastroenterology, Infectious Diseases and Rheumatology, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany.
- Berlin Institute of Health at Charité Universitätsmedizin Berlin, Charitéplatz1, 10117, Berlin, Germany.
| | - Alexander Arnold
- Institute of Pathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - A A Kühl
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, iPATH.Berlin, Campus Benjamin Franklin, Berlin, Germany
| | - M Pötzsch
- Medical Department, Division of Gastroenterology, Infectious Diseases and Rheumatology, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany
| | - S Daum
- Medical Department, Division of Gastroenterology, Infectious Diseases and Rheumatology, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany
- Berlin Institute of Health at Charité Universitätsmedizin Berlin, Charitéplatz1, 10117, Berlin, Germany
| | - M Winterfeld
- Institute of Pathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - E Berg
- Institute of Pathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - M Hummel
- Institute of Pathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - B Rau
- Department of Surgery, Campus Virchow-Klinikum and Campus Mitte, Charité - Universitätsmedizin, Berlin, Germany
| | - U Stein
- Experimental and Clinical Research Center, Charité - Universitätsmedizin and Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- German Cancer Consortium (DKTK), Heidelberg, Germany
| | - C Treese
- Medical Department, Division of Gastroenterology, Infectious Diseases and Rheumatology, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany
- Berlin Institute of Health at Charité Universitätsmedizin Berlin, Charitéplatz1, 10117, Berlin, Germany
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Roosma E, Van Gemert J, De Zwart A, Van Leer-Buter C, Hellemons M, Berg E, Luijk B, Akkerman O, Verschuuren E, Gan C. The Effect of COVID-19 Infection on Transplant Function and Development of CLAD in Lung Transplant Patients: A Multicenter Experience. J Heart Lung Transplant 2022. [PMCID: PMC8988553 DOI: 10.1016/j.healun.2022.01.257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Purpose Concerns have been raised on the impact of the coronavirus disease (COVID-19) on lung transplant (LTx) patients. The aim of this study was to evaluate the effect on the clinical course and transplant function pre- and post-COVID-19 infection in LTx patients. Methods Data were retrospectively collected from adult LTx patients with a proven COVID-19 infection from three Dutch transplant centres, between February 2020 and September 2021. Spirometry results were collected pre-COVID-19 infection and within 3 and 6 months post-COVID-19 infection. Results A total of 59 LTx patients had been tested positive for COVID-19. The median age was 58 years (IQR 49-66), 64% was male and median time since transplantation was 5 years (IQR 2-11). Thirty-three patients (56%) were hospitalized, 30 (51%) were in need for supplemental oxygen therapy, 17 (29%) were admitted to the intensive care unit (ICU) and 13 (22%) required invasive mechanical ventilation. Thirteen patients died (22%), 10 in ICU (77%), 3 (23%) on general wards. Post-COVID-19 spirometry results were available in 45 (76%) patients within three months post-infection and in 34 (58%) 6 months post-infection. Spirometry results and the prevalence of chronic lung allograft dysfunction (CLAD) are shown in Table 1. CLAD pre-COVID-19 was not associated with higher mortality (12% vs 10%, p = 0.162). Conclusion In LTx patients COVID-19 infection results in high hospitalization and mortality rate. FVC and FEV1 was declined three months after infection and gradually improved at 6 months post-COVID-19 infection. However, FVC remained significantly lower after 6 months, demonstrating a more restrictive pattern. The prevalence of CLAD did not change after COVID-19 infection. Further follow-up is required to obtain more detailed information about CLAD.
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Levesque T, Perzo N, Berg E, Messaoudi H, Herbet A, Colleville B, Dumesnil A, Doguet F, Eltchaninoff H, Boquet D, Richard V, Bellien J. Calcification of aortic valvular interstitial cells induced by endothelin receptor blockers. Archives of Cardiovascular Diseases Supplements 2021. [DOI: 10.1016/j.acvdsp.2021.04.180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ota R, Nakajima K, Ogawa I, Tamagawa Y, Kwon SI, Berg E, Cherry SR, Shimoi H, Hasegawa Y, Nishizawa H, Shimano K, Hasegawa T. Lead-free MCP to improve coincidence time resolution and reduce MCP direct interactions. Phys Med Biol 2021; 66:064006. [PMID: 33636710 DOI: 10.1088/1361-6560/abea2c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Achieving direct imaging of the annihilation position of a positron on an event-by-event basis using an ultrafast detector would have a great impact on the field of nuclear medicine. Cherenkov emission is the most attractive physical phenomenon for realizing such an ultrafast timing performance. Moreover, a microchannel-plate photomultiplier tube (MCP-PMT) is one of the most promising photodetectors for fully exploiting the fast timing properties of Cherenkov emission owing to its excellent single photon time resolution of 25 ps full width at half maximum (FWHM). However, as the MCP structure generally contains a lead compound, the gamma rays frequently and directly interact with the MCP, resulting in the degradation of its timing performance and generation of undesirable side peaks in its coincidence timing histogram. To overcome this problem, we have developed a new MCP-PMT based on an MCP consisting of borosilicate glass, thus drastically reducing the probability of the photoelectric effect occurring in the MCP. To evaluate its insensitivity to gamma rays and its timing performance, a coincidence experiment was performed and showed that the probability of direct interactions was reduced by a factor of 3.4. Moreover, a coincidence time resolution of 35.4 ± 0.4 ps FWHM, which is equivalent to a position resolution of 5.31 mm, was obtained without any pulse height/area cut, improving to 28.7 ± 3.0 ps when selecting on the highest amplitude events by careful optimization of the voltage divider circuit of the new MCP-PMT. The timing performance of this new MCP-PMT presents an important step toward making direct imaging possible.
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Affiliation(s)
- R Ota
- Central Research Laboratory, Hamamatsu Photonics K. K., Hamamatsu, Japan
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9
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Pötzsch M, Berg E, Hummel M, Stein U, von Winterfeld M, Jöhrens K, Rau B, Daum S, Treese C. Better prognosis of gastric cancer patients with high levels of tumor infiltrating lymphocytes is counteracted by PD-1 expression. Oncoimmunology 2020; 9:1824632. [PMID: 33101772 PMCID: PMC7553533 DOI: 10.1080/2162402x.2020.1824632] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 06/03/2020] [Revised: 09/02/2020] [Accepted: 09/02/2020] [Indexed: 12/20/2022] Open
Abstract
The prognostic potential of anti-tumor immune responses is becoming increasingly important in adenocarcinoma of the gastroesophageal junction and stomach (AGE/S) especially regarding the use of immune checkpoint inhibitors. This study analyzes for the first time the prognostic impact of tumor-infiltrating lymphocytes (TILs) and checkpoint inhibitors in a large Caucasian cohort in patients with AGE/S. We screened tissue samples from 438 therapy-naïve patients with AGE/S undergoing surgery between 1992 and 2005, examined in a tissue microarray (TMA) and stained against human CD3, CD4, CD8, PD-1, and PD-L1. Out of 438 tissue samples, 210 were eligible for multivariate analysis. This revealed that high infiltration with CD3+, CD4+, or CD8+ TILs was associated with an increased overall survival in AGE/S patients, which could only be confirmed in multivariate analysis for CD3 (HR: 0.326; p = .023). Independent improved survival was limited to gastric cancer patients and to early tumor stages as long as TILs did not express PD-1 (HR: 1.522; p = .021). Subgroup analyses indicate that TIL-dependent anti-tumor immune response is only effective in gastric cancer patients in early stages of disease in PD-1 negative TILs. Combined analysis of PD-1 and CD3 could serve as a prognostic marker for the clinical outcome of gastric cancer patients and could also be of interest for immunotherapy.
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Affiliation(s)
- M. Pötzsch
- Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
- Department of Gastroenterology, Infectious Diseases and Rheumatology, Campus Benjamin Franklin, Berlin, Germany
| | - E. Berg
- Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
- Department of Gastroenterology, Infectious Diseases and Rheumatology, Campus Benjamin Franklin, Berlin, Germany
| | - M. Hummel
- Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
- 1.Institute for Pathology, Charité - Universitätsmedizin Berlin, Charité Campus Mitte, Berlin, Germany
| | - U. Stein
- Experimental and Clinical Research Center, Charité - Universitätsmedizin, Berlin and Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- German Cancer Consortium (DKTK), Heidelberg, Germany
| | - M. von Winterfeld
- Institute of Pathology Heidelberg, University Hospital Heidelberg, Germany
| | - K. Jöhrens
- Institute of Pathology, University Carl Gustav Carus, Dresden, Germany
| | - B. Rau
- Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
- Department of Surgery, Campus Virchow-Klinikum and Charité Campus Mitte, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - S. Daum
- Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
- Department of Gastroenterology, Infectious Diseases and Rheumatology, Campus Benjamin Franklin, Berlin, Germany
- Berlin Institute of Health (BIH), Berlin, Germany
| | - C. Treese
- Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
- Department of Gastroenterology, Infectious Diseases and Rheumatology, Campus Benjamin Franklin, Berlin, Germany
- Experimental and Clinical Research Center, Charité - Universitätsmedizin, Berlin and Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- Berlin Institute of Health (BIH), Berlin, Germany
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Seitz V, Kleo K, Dröge A, Schaper S, Elezkurtaj S, Bedjaoui N, Dimitrova L, Sommerfeld A, Berg E, von der Wall E, Müller U, Joosten M, Lenze D, Heimesaat MM, Baldus C, Zinser C, Cieslak A, Macintyre E, Stocking C, Hennig S, Hummel M. Evidence for a role of RUNX1 as recombinase cofactor for TCRβ rearrangements and pathological deletions in ETV6-RUNX1 ALL. Sci Rep 2020; 10:10024. [PMID: 32572036 PMCID: PMC7308335 DOI: 10.1038/s41598-020-65744-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 05/06/2020] [Indexed: 11/08/2022] Open
Abstract
T-cell receptor gene beta (TCRβ) gene rearrangement represents a complex, tightly regulated molecular mechanism involving excision, deletion and recombination of DNA during T-cell development. RUNX1, a well-known transcription factor for T-cell differentiation, has recently been described to act in addition as a recombinase cofactor for TCRδ gene rearrangements. In this work we employed a RUNX1 knock-out mouse model and demonstrate by deep TCRβ sequencing, immunostaining and chromatin immunoprecipitation that RUNX1 binds to the initiation site of TCRβ rearrangement and its homozygous inactivation induces severe structural changes of the rearranged TCRβ gene, whereas heterozygous inactivation has almost no impact. To compare the mouse model results to the situation in Acute Lymphoblastic Leukemia (ALL) we analyzed TCRβ gene rearrangements in T-ALL samples harboring heterozygous Runx1 mutations. Comparable to the Runx1+/- mouse model, heterozygous Runx1 mutations in T-ALL patients displayed no detectable impact on TCRβ rearrangements. Furthermore, we reanalyzed published sequence data from recurrent deletion borders of ALL patients carrying an ETV6-RUNX1 translocation. RUNX1 motifs were significantly overrepresented at the deletion ends arguing for a role of RUNX1 in the deletion mechanism. Collectively, our data imply a role of RUNX1 as recombinase cofactor for both physiological and aberrant deletions.
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Affiliation(s)
- V Seitz
- Charité University Medicine Berlin, Institute of Pathology, Berlin, Germany
- HS Diagnomics GmbH, Berlin, Germany
| | - K Kleo
- Charité University Medicine Berlin, Institute of Pathology, Berlin, Germany
| | - A Dröge
- HS Diagnomics GmbH, Berlin, Germany
| | | | - S Elezkurtaj
- Charité University Medicine Berlin, Institute of Pathology, Berlin, Germany
| | - N Bedjaoui
- University of Paris, Institute Necker-Enfants Malades (INEM), INSERM U1151, Laboratoire d'Onco-Hematology, Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Necker Enfants-Malades, Paris, France
| | - L Dimitrova
- Charité University Medicine Berlin, Institute of Pathology, Berlin, Germany
| | - A Sommerfeld
- Charité University Medicine Berlin, Institute of Pathology, Berlin, Germany
| | - E Berg
- Charité University Medicine Berlin, Institute of Pathology, Berlin, Germany
| | - E von der Wall
- Charité University Medicine Berlin, Institute of Pathology, Berlin, Germany
| | - U Müller
- Heinrich-Pette-Institute, Leibniz-Institute for Experimental Virology, Hamburg, Germany
| | - M Joosten
- Charité University Medicine Berlin, Institute of Pathology, Berlin, Germany
| | - D Lenze
- Charité University Medicine Berlin, Institute of Pathology, Berlin, Germany
| | - M M Heimesaat
- Charité University Medicine Berlin, Institute of Microbiology, Infectious Diseases and Immunology, Berlin, Germany
| | - C Baldus
- University Medical Center Schleswig-Holstein, Department of Internal Medicine II, Kiel, Germany
| | - C Zinser
- Precigen Bioinformatics Germany GmbH, Munich, Germany
| | - A Cieslak
- University of Paris, Institute Necker-Enfants Malades (INEM), INSERM U1151, Laboratoire d'Onco-Hematology, Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Necker Enfants-Malades, Paris, France
| | - E Macintyre
- University of Paris, Institute Necker-Enfants Malades (INEM), INSERM U1151, Laboratoire d'Onco-Hematology, Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Necker Enfants-Malades, Paris, France
| | - C Stocking
- University Medical Center Eppendorf, Department of Stem Cell Transplantation, Hamburg, Germany
| | - S Hennig
- HS Diagnomics GmbH, Berlin, Germany
| | - M Hummel
- Charité University Medicine Berlin, Institute of Pathology, Berlin, Germany.
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11
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Zondiner U, Rozen A, Rodan-Legrain D, Cao Y, Queiroz R, Taniguchi T, Watanabe K, Oreg Y, von Oppen F, Stern A, Berg E, Jarillo-Herrero P, Ilani S. Cascade of phase transitions and Dirac revivals in magic-angle graphene. Nature 2020; 582:203-208. [PMID: 32528091 DOI: 10.1038/s41586-020-2373-y] [Citation(s) in RCA: 181] [Impact Index Per Article: 45.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 04/23/2020] [Indexed: 11/09/2022]
Abstract
Twisted bilayer graphene near the magic angle1-4 exhibits rich electron-correlation physics, displaying insulating3-6, magnetic7,8 and superconducting phases4-6. The electronic bands of this system were predicted1,2 to narrow markedly9,10 near the magic angle, leading to a variety of possible symmetry-breaking ground states11-17. Here, using measurements of the local electronic compressibility, we show that these correlated phases originate from a high-energy state with an unusual sequence of band population. As carriers are added to the system, the four electronic 'flavours', which correspond to the spin and valley degrees of freedom, are not filled equally. Rather, they are populated through a sequence of sharp phase transitions, which appear as strong asymmetric jumps of the electronic compressibility near integer fillings of the moiré lattice. At each transition, a single spin/valley flavour takes all the carriers from its partially filled peers, 'resetting' them to the vicinity of the charge neutrality point. As a result, the Dirac-like character observed near charge neutrality reappears after each integer filling. Measurement of the in-plane magnetic field dependence of the chemical potential near filling factor one reveals a large spontaneous magnetization, further substantiating this picture of a cascade of symmetry breaking. The sequence of phase transitions and Dirac revivals is observed at temperatures well above the onset of the superconducting and correlated insulating states. This indicates that the state that we report here, with its strongly broken electronic flavour symmetry and revived Dirac-like electronic character, is important in the physics of magic-angle graphene, forming the parent state out of which the more fragile superconducting and correlated insulating ground states emerge.
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Affiliation(s)
- U Zondiner
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel
| | - A Rozen
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel
| | - D Rodan-Legrain
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Y Cao
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - R Queiroz
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel
| | - T Taniguchi
- National Institute for Materials Science, Tsukuba, Japan
| | - K Watanabe
- National Institute for Materials Science, Tsukuba, Japan
| | - Y Oreg
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel
| | - F von Oppen
- Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, Berlin, Germany
| | - Ady Stern
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel
| | - E Berg
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel
| | - P Jarillo-Herrero
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA.
| | - S Ilani
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel.
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12
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13
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Kersting S, Athanasiadis CJ, Jung KP, Berg E. Operative results, sexual function and quality of life after gracilis muscle transposition in complex rectovaginal fistulas. Colorectal Dis 2019; 21:1429-1437. [PMID: 31245912 DOI: 10.1111/codi.14741] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 06/10/2019] [Indexed: 12/12/2022]
Abstract
AIM Successful treatment of complex rectovaginal fistulas (RVFs) continues to be a surgical challenge. Interposition of well-perfused tissue, such as gracilis muscle, is one treatment option. The aim of this study was to investigate the operative results, sexual function and quality of life after gracilis muscle transposition (GMT) in the authors' own group of patients. METHOD The study included 19 women with RVF (mean age 48 years). The postoperative outcome was evaluated by a questionnaire and clinical examination. RESULTS The postoperative follow-up period was 7 months to 3.5 years (mean 23 months). GMT led to primary healing of RVF in 10 (53%) patients. Recurrences were observed in nine (47%) patients with RVF, in four (44%) of whom healing was achieved as a result of further interventions. Following GMT, two complications (abscess formation) requiring revision occurred. Although 42% of the patients reported certain limitations following muscle removal, GMT is a procedure that has a positive influence on the healing rate (74%), quality of life, continence and patient satisfaction. CONCLUSION GMT is a procedure that allows healing in the majority of patients with RVFs, and it should be considered especially in patients with recurrent fistulas, in whom a correlation between decreasing healing rates and the number of previous operations has been demonstrated.
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Affiliation(s)
- S Kersting
- Department of General Surgery, Katharinen-Hospital Unna, Unna, Germany
| | - C-J Athanasiadis
- Department of Coloproctology, Prosper-Hospital Recklinghausen, Recklinghausen, Germany
| | - K-P Jung
- Department of Coloproctology, Prosper-Hospital Recklinghausen, Recklinghausen, Germany
| | - E Berg
- Department of Coloproctology, Prosper-Hospital Recklinghausen, Recklinghausen, Germany
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14
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Högdén A, Antovic A, Berg E, Bremme K, Chaireti R. Obstetric outcomes in patients with primary thrombotic and obstetric antiphospholipid syndrome and its relation to the antiphospholipid antibody profile. Lupus 2019; 28:868-877. [DOI: 10.1177/0961203319852155] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Introduction: Previous studies suggested different obstetric outcomes between patients with thrombotic or obstetric antiphospholipid syndrome, but the data are inconclusive. Aims: To investigate obstetric outcomes and their relation to the antiphospholipid antibody profile in primary thrombotic or obstetric antiphospholipid syndrome patients and compare those to a control population. Materials and methods: A retrospective single-centre study on a cohort of 30 pregnant women with primary antiphospholipid syndrome treated at Karolinska University Hospital Solna, Sweden between 2000 and 2016. The pregnancy outcomes were compared to the outcomes of all pregnancies in Stockholm County during the same period. Results: Preeclampsia ( p < 0.001), low birth weight at delivery ( p = 0.001), Apgar < 7 at 5 minutes ( p < 0.001) and small infants ( p < 0.001) were more common in antiphospholipid syndrome patients compared to controls. Obstetric antiphospholipid syndrome patients had a higher incidence of small infants ( p = 0.023), lower birth weight ( p = 0.013) and infants born with complications ( p=0.004) compared to thrombotic antiphospholipid syndrome. Mothers with triple antibody positivity had a higher incidence of preeclampsia ( p = 0.03), preterm delivery ( p = 0.011), small infants ( p=0.002) and infants born with complications ( p = 0.012). Conclusions: Patients with primary antiphospholipid syndrome, especially those with obstetric antiphospholipid syndrome and triple antibody positivity, are at higher risk for adverse pregnancy outcomes, even under antithrombotic treatment. More frequent antenatal controls in high-risk patients can further improve outcomes.
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Affiliation(s)
- A Högdén
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
| | - A Antovic
- Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - E Berg
- LIME/MedStat, Karolinska Institutet, Stockholm, Sweden
| | - K Bremme
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
| | - R Chaireti
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Solna, Sweden
- Department of Hematology, Karolinska University Hospital, Stockholm, Sweden
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15
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Wollenberg A, Srour J, Smolik T, Berg E, Mahltig B. Silver, silk, atopic eczema and the
CLOTHES
trial – reply to a letter. J Eur Acad Dermatol Venereol 2019; 33:e169. [DOI: 10.1111/jdv.15401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A. Wollenberg
- Department Dermatology and Allergy Ludwig‐Maximilian University Frauenlobstr. 9‐11 D‐80337 Munich Germany
- Klinik Thalkirchner Straße München Klinik, Thlkirchner Straße 48 Munich D‐80337 Germany
| | - J. Srour
- Department Dermatology and Allergy Ludwig‐Maximilian University Frauenlobstr. 9‐11 D‐80337 Munich Germany
- Klinik Thalkirchner Straße München Klinik, Thlkirchner Straße 48 Munich D‐80337 Germany
| | - T. Smolik
- Texamed GmbH Linienthalstraße 29 Ismaning D‐85399 Germany
| | - E. Berg
- Texamed GmbH Linienthalstraße 29 Ismaning D‐85399 Germany
| | - B. Mahltig
- Niederrhein University of Applied Sciences Webschulstr. 31 Mönchengladbach D‐41065 Germany
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16
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Nelson M, Ward A, Swanson K, Vonnahme K, Berg E. PSII-2 Effects of Replacing Supplemental Sucrose with Beef on Maternal Health and Fetal Growth and Development Using a Sow Biomedical Model. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- M Nelson
- North Dakota State University,Fargo, ND, United States
| | - A Ward
- North Dakota State University,Fargo, ND, United States
| | - K Swanson
- North Dakota State University,Fargo, ND, United States
| | - K Vonnahme
- North Dakota State University,Fargo, ND, United States
| | - E Berg
- North Dakota State University,Fargo, ND, United States
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17
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Siomka A, Young J, Berg E. PSI-9 The Impact of Maternal Nutrition on Offspring Carcass Composition and Quality. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A Siomka
- North Dakota State University,Fargo, ND, United States
| | - J Young
- North Dakota State University,Fargo, ND, United States
| | - E Berg
- North Dakota State University,Fargo, ND, United States
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18
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Reed D, Berg E, Sun X, Berg P. PSII-1 A comparison of fatty acid attributes and edible meat yield percentage in different species of deer meat. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- D Reed
- North Dakota State University,West Fargo, ND, United States
| | - E Berg
- North Dakota State University,West Fargo, ND, United States
| | - X Sun
- North Dakota State University,West Fargo, ND, United States
| | - P Berg
- North Dakota State University,West Fargo, ND, United States
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19
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Sylte I, Dawadi R, Malla N, von Hofsten S, Nguyen TM, Solli AI, Berg E, Adekoya OA, Svineng G, Winberg JO. The selectivity of galardin and an azasugar-based hydroxamate compound for human matrix metalloproteases and bacterial metalloproteases. PLoS One 2018; 13:e0200237. [PMID: 30075004 PMCID: PMC6075749 DOI: 10.1371/journal.pone.0200237] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 06/22/2018] [Indexed: 02/07/2023] Open
Abstract
Inhibitors targeting bacterial enzymes should not interfere with enzymes of the host, and knowledge about structural determinants for selectivity is important for designing inhibitors with a therapeutic potential. We have determined the binding strengths of two hydroxamate compounds, galardin and compound 1b for the bacterial zinc metalloproteases, thermolysin, pseudolysin and auerolysin, known to be bacterial virulence factors, and the two human zinc metalloproteases MMP-9 and MMP-14. The active sites of the bacterial and human enzymes have huge similarities. In addition, we also studied the enzyme-inhibitor interactions by molecular modelling. The obtained Ki values of galardin for MMP-9 and MMP-14 and compound 1b for MMP-9 are approximately ten times lower than previously reported. Compound 1b binds stronger than galardin to both MMP-9 and MMP-14, and docking studies indicated that the diphenyl ether moiety of compound 1b obtains more favourable interactions within the S´1-subpocket than the 4-methylpentanoyl moiety of galardin. Both compounds bind stronger to MMP-9 than to MMP-14, which appears to be due to a larger S´1-subpocket in the former enzyme. Galardin, but not 1b, inhibits the bacterial enzymes, but the galardin Ki values were much larger than for the MMPs. The docking indicates that the S´1-subpockets of the bacterial proteases are too small to accommodate the diphenyl ether moiety of 1b, while the 4-methylpentanoyl moiety of galardin enters the pocket. The present study indicates that the size and shape of the ligand structural moiety entering the S´1-subpocket is an important determinant for selectivity between the studied MMPs and bacterial MPs.
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Affiliation(s)
- Ingebrigt Sylte
- Department of Medical Biology, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Rangita Dawadi
- Department of Medical Biology, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Nabin Malla
- Department of Medical Biology, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Susannah von Hofsten
- Department of Medical Biology, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Tra-Mi Nguyen
- Department of Pharmacy, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Ann Iren Solli
- Department of Medical Biology, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Eli Berg
- Department of Medical Biology, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Olayiwola A. Adekoya
- Department of Pharmacy, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Gunbjørg Svineng
- Department of Medical Biology, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Jan-Olof Winberg
- Department of Medical Biology, Faculty of Health Sciences, UiT-The Arctic University of Norway, Tromsø, Norway
- * E-mail:
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20
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Srour J, Berg E, Mahltig B, Smolik T, Wollenberg A. Evaluation of antimicrobial textiles for atopic dermatitis. J Eur Acad Dermatol Venereol 2018; 33:384-390. [DOI: 10.1111/jdv.15123] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 05/23/2018] [Indexed: 01/13/2023]
Affiliation(s)
- J. Srour
- Department of Dermatology and Allergy; Ludwig-Maximilian University; Munich Germany
| | - E. Berg
- Texamed GmbH; Ismaning Germany
| | - B. Mahltig
- Hochschule Niederrhein; Mönchengladbach Germany
| | | | - A. Wollenberg
- Department of Dermatology and Allergy; Ludwig-Maximilian University; Munich Germany
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21
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Reed D, Germolus A, Berg E, Newman D, Sun X, Berg P. Bridging the Gap between Consumers and Agriculture Producers Using the NDSU BBQ Boot Camp Model. Meat and Muscle Biology 2018. [DOI: 10.22175/rmc2018.144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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22
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Magnussen SN, Hadler-Olsen E, Costea DE, Berg E, Jacobsen CC, Mortensen B, Salo T, Martinez-Zubiaurre I, Winberg JO, Uhlin-Hansen L, Svineng G. Cleavage of the urokinase receptor (uPAR) on oral cancer cells: regulation by transforming growth factor - β1 (TGF-β1) and potential effects on migration and invasion. BMC Cancer 2017; 17:350. [PMID: 28526008 PMCID: PMC5438506 DOI: 10.1186/s12885-017-3349-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 05/12/2017] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Urokinase plasminogen activator (uPA) receptor (uPAR) is up-regulated at the invasive tumour front of human oral squamous cell carcinoma (OSCC), indicating a role for uPAR in tumour progression. We previously observed elevated expression of uPAR at the tumour-stroma interface in a mouse model for OSCC, which was associated with increased proteolytic activity. The tumour microenvironment regulated uPAR expression, as well as its glycosylation and cleavage. Both full-length- and cleaved uPAR (uPAR (II-III)) are involved in highly regulated processes such as cell signalling, proliferation, migration, stem cell mobilization and invasion. The aim of the current study was to analyse tumour associated factors and their effect on uPAR cleavage, and the potential implications for cell proliferation, migration and invasion. METHODS Mouse uPAR was stably overexpressed in the mouse OSCC cell line AT84. The ratio of full-length versus cleaved uPAR as analysed by Western blotting and its regulation was assessed by addition of different protease inhibitors and transforming growth factor - β1 (TGF-β1). The role of uPAR cleavage in cell proliferation and migration was analysed using real-time cell analysis and invasion was assessed using the myoma invasion model. RESULTS We found that when uPAR was overexpressed a proportion of the receptor was cleaved, thus the cells presented both full-length uPAR and uPAR (II-III). Cleavage was mainly performed by serine proteases and urokinase plasminogen activator (uPA) in particular. When the OSCC cells were stimulated with TGF-β1, the production of the uPA inhibitor PAI-1 was increased, resulting in a reduction of uPAR cleavage. By inhibiting cleavage of uPAR, cell migration was reduced, and by inhibiting uPA activity, invasion was reduced. We could also show that medium containing soluble uPAR (suPAR), and cleaved soluble uPAR (suPAR (II-III)), induced migration in OSCC cells with low endogenous levels of uPAR. CONCLUSIONS These results show that soluble factors in the tumour microenvironment, such as TGF-β1, PAI-1 and uPA, can influence the ratio of full length and uPAR (II-III) and thereby potentially effect cell migration and invasion. Resolving how uPAR cleavage is controlled is therefore vital for understanding how OSCC progresses and potentially provides new targets for therapy.
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Affiliation(s)
- Synnove Norvoll Magnussen
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway.
| | - Elin Hadler-Olsen
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway.,Diagnostic Clinic - Clinical Pathology, University Hospital of North Norway, Tromsø, Norway
| | - Daniela Elena Costea
- Gade Laboratory for Pathology, Department of Clinical Medicine, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway.,Department of Pathology, Haukeland University Hospital, Bergen, Norway
| | - Eli Berg
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway
| | - Cristiane Cavalcanti Jacobsen
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway
| | - Bente Mortensen
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway
| | - Tuula Salo
- Cancer and Translational Research Medicine Unit, University of Oulu, Oulu, Finland.,Medical Research Center, Oulu University Hospital, Oulu, Finland.,Oral and Maxillofacial diseases, Clinicum, University of Helsinki, Helsinki, Finland.,Helsinki University Hospital Helsinki, Helsinki, Finland.,Department of Oral Diagnosis, Oral Pathology Division, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, SP-13414-903, Brazil
| | - Inigo Martinez-Zubiaurre
- Department of Clinical Medicine, Faculty of Health Sciences, UiT - The Arctic University of Norway, Tromsø, Norway
| | - Jan-Olof Winberg
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway
| | - Lars Uhlin-Hansen
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway.,Diagnostic Clinic - Clinical Pathology, University Hospital of North Norway, Tromsø, Norway
| | - Gunbjorg Svineng
- Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, N-9037, Tromsø, Norway
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23
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Sun X, Newman D, Young J, Zhang Y, Berg E. Prediction of Pork Fatty Acid Content Using Image Texture Features. Meat and Muscle Biology 2017. [DOI: 10.22175/rmc2016.096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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24
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Ogdahl W, Ward A, Knutson E, Liu J, Wirt S, Berg E, Sun X. Predict Beef Tenderness Using Image Texture Features. Meat and Muscle Biology 2017. [DOI: 10.22175/rmc2017.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Ommer A, Herold A, Berg E, Farke S, Fürst A, Hetzer F, Köhler A, Post S, Ruppert R, Sailer M, Schiedeck T, Schwandner O, Strittmatter B, Lenhard BH, Bader W, Krege S, Krammer H, Stange E. S3-Leitlinie: Kryptoglanduläre Analfisteln. coloproctology 2016. [DOI: 10.1007/s00053-016-0110-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Menchine M, Terp S, Arora S, Berg E, Lam C, Seabury S. 128 Determining Factors Associated With EMTALA Investigations and Citations: For-Profit Hospitals at Increased Risk. Ann Emerg Med 2016. [DOI: 10.1016/j.annemergmed.2016.08.140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
An open software system for automatic data collection during cardiopulmonary bypass is presented. The software is run on a microprocessor with permanent memory, a general purpose interface board capable of analogue-to-digital conversion and five serial communication ports for data collection. Analogue data signals for blood flow, gas flow, patient temperatures and pressures are automatically recorded and referenced to real time. Continuous inline blood gas and temperature parameters are passed to the microprocessor for storage in a database. Results from a blood analyser and an electrolyte analyser, placed in the next room, are automatically passed to the computer and presented on the screen. This system provides the perfusionist with automatic preoperative calculations of all parameters necessary for setting up the perfusion. During bypass, data are automatically collected, presented for evaluation and used in calculated transformations. A maximum of 36 real time curves are traced and stored as trend curves. In critical situations they may also be stored as real time curves. These curves can be recalled or plotted for further analysis. At the end of bypass a perfusion report is printed out. The records of the patients are permanently stored on disk and the files can be transferred to other software systems for further statistical analysis.
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Berg E. På tide å skifte spor. Tidsskriftet 2016; 136:377. [DOI: 10.4045/tidsskr.16.0150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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Berg E, Ptacek J, Liimata M, O’Mahony A. Elucidating mechanisms of toxicity using human primary cell systems. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Walker N, Leatherwood J, Brooks R, Smith C, TenBroeck S, Vernon K, Waite K, Volgesang M, Egan B, Berg E, Miller J. 165 National American Collegiate Horsemen's Association Convention: an effective equine educational venue. J Equine Vet Sci 2015. [DOI: 10.1016/j.jevs.2015.03.178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lederer S, Schattner Y, Berg E, Kivelson SA. Enhancement of superconductivity near a nematic quantum critical point. Phys Rev Lett 2015; 114:097001. [PMID: 25793842 DOI: 10.1103/physrevlett.114.097001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Indexed: 06/04/2023]
Abstract
We consider a low T_{c} metallic superconductor weakly coupled to the soft fluctuations associated with proximity to a nematic quantum critical point (NQCP). We show that (1) a BCS-Eliashberg treatment remains valid outside of a parametrically narrow interval about the NQCP, (2) the symmetry of the superconducting state (d wave, s wave, p wave) is typically determined by the noncritical interactions, but T_{c} is enhanced by the nematic fluctuations in all channels, and (3) in 2D, this enhancement grows upon approach to criticality up to the point at which the weak coupling approach breaks down, but in 3D, the enhancement is much weaker.
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Affiliation(s)
- S Lederer
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - Y Schattner
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - E Berg
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - S A Kivelson
- Department of Physics, Stanford University, Stanford, California 94305, USA
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Sjøli S, Solli AI, Akselsen Ø, Jiang Y, Berg E, Hansen TV, Sylte I, Winberg JO. PAC-1 and isatin derivatives are weak matrix metalloproteinase inhibitors. Biochim Biophys Acta Gen Subj 2014; 1840:3162-9. [DOI: 10.1016/j.bbagen.2014.07.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 07/07/2014] [Accepted: 07/14/2014] [Indexed: 01/20/2023]
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Ommer A, Berg E, Breitkopf C, Bussen D, Doll D, Fürst A, Herold A, Hetzer F, Jacobi T, Krammer H, Lenhard B, Osterholzer G, Petersen S, Ruppert R, Schwandner O, Sailer M, Schiedeck T, Schmidt-Lauber M, Stoll M, Strittmatter B, Iesalnieks I. S3-Leitlinie: Sinus pilonidalis. coloproctology 2014. [DOI: 10.1007/s00053-014-0467-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Layman H, Melrose J, Tang W, Brown N, Nguyen D, Melton A, Polokoff M, Berg E, O'Mahony A. S50. Proffered paper: Complex tumour microenvironment screening platform captures biological responses of cancer therapeutics. J Immunother Cancer 2014. [PMCID: PMC4072104 DOI: 10.1186/2051-1426-2-s2-i12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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35
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Kersting S, Berg E. [Practical Implementation of the "Four-column Concept" in the Situation-Adjusted Therapy for Haemorrhoidal Disease in the Daily Routine of a Proctology Department]. Zentralbl Chir 2013; 140:660-5. [PMID: 23846537 DOI: 10.1055/s-0032-1328564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
INTRODUCTION In addition to the stage, several factors influence the treatment of haemorrhoids. The aim of this study was the elaboration of an individual therapy concept which is situation-adjusted. In this context, our own experience and approaches are presented. MATERIALS AND METHODS In the Department of Coloproctology of the Prosper-Hospital Recklinghausen, from January 2009 to August 2012, 903 haemorrhoidectomies (2nd to 4th degree) have been performed. We report our results on the practical implementation of a situation-adjusted treatment of haemorrhoidal disease. In this context we present an overview of effective modifications of surgical techniques. Retrospectively the perioperative course and postoperative outcome were evaluated. RESULTS Even in a collective with a large number of high-risk patients (26 %) respecting the "four columns" that constitute the fundament of a situation-adjusted treatment of haemorrhoids, high patient satisfaction and good outcome with low complication (7 %) and recurrence (0 %) rates could be attained. CONCLUSION The "four columns" (findings of examination, therapeutic options, physician and patient) form the fundament of an effective treatment of haemorrhoidal disease without many complications and guarantee an individually tailored therapy for each patient.
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Affiliation(s)
- S Kersting
- Abteilung für Koloproktologie, Prosper-Hospital, Recklinghausen, Deutschland
| | - E Berg
- Abteilung für Koloproktologie, Prosper-Hospital, Recklinghausen, Deutschland
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Abstract
In addition to the stage several factors influence the treatment of haemorrhoids. The adequate treatment of haemorrhoids is not solely dependent on the stage, thus a situation-adapted therapy should be preferred. Advantages, disadvantages and specific characteristics of different therapy strategies in addition to potential complication risks have to be evaluated in order to obtain an effective and low-risk course. Also requests and personal living conditions of the patient as well as the expertise and experience of the physician have to be considered. A review of the current literature has been performed and a "four columns concept" has been developed that constitutes the fundament of a situation-adjusted treatment of haemorrhoids. The "four columns" that should be considered when therapy strategies are determined are composed of the following key factors: diagnostic findings, treatment alternatives, physician, and patient.
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Affiliation(s)
- S Kersting
- Abteilung für Koloproktologie, Prosper-Hospital, Recklinghausen, Deutschland
| | - E Berg
- Abteilung für Koloproktologie, Prosper-Hospital, Recklinghausen, Deutschland
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Johnson AK, Gesing LM, Ellis M, McGlone JJ, Berg E, Lonergan SM, Fitzgerald R, Karriker LA, Ramirez A, Stalder KJ, Sapkota A, Kephart R, Selsby JT, Sadler LJ, Ritter MJ. 2011 AND 2012 EARLY CAREERS ACHIEVEMENT AWARDS: Farm and pig factors affecting welfare during the marketing process1,2. J Anim Sci 2013; 91:2481-91. [PMID: 23478817 DOI: 10.2527/jas.2012-6114] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- A. K. Johnson
- Department of Animal Science, Iowa State University, Ames 50011
| | - L. M. Gesing
- Department of Animal Sciences, University of Illinois, Urbana 61801
| | - M. Ellis
- Department of Animal Sciences, University of Illinois, Urbana 61801
| | | | - E. Berg
- Department of Animal Sciences, North Dakota State University, Fargo 58108
| | - S. M. Lonergan
- Department of Animal Science, Iowa State University, Ames 50011
| | - R. Fitzgerald
- Department of Animal Science, Iowa State University, Ames 50011
| | - L. A. Karriker
- Swine Medicine Education Center, Iowa State University, Ames 50011
| | - A. Ramirez
- Swine Medicine Education Center, Iowa State University, Ames 50011
| | - K. J. Stalder
- Department of Animal Science, Iowa State University, Ames 50011
| | | | - R. Kephart
- Department of Animal Science, Iowa State University, Ames 50011
| | - J. T. Selsby
- Department of Animal Science, Iowa State University, Ames 50011
| | - L. J. Sadler
- Department of Biomedical Sciences, Iowa State University, Ames 50011
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Malla N, Berg E, Theocharis AD, Svineng G, Uhlin-Hansen L, Winberg JO. In vitroreconstitution of complexes between pro-matrix metalloproteinase-9 and the proteoglycans serglycin and versican. FEBS J 2013; 280:2870-87. [DOI: 10.1111/febs.12291] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 04/08/2013] [Accepted: 04/16/2013] [Indexed: 12/20/2022]
Affiliation(s)
- Nabin Malla
- Department of Medical Biology; University of Tromsø; Norway
| | - Eli Berg
- Department of Medical Biology; University of Tromsø; Norway
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Berg E, Mcgregor J, Burkart M, Poulton C, Hogan S. What everybody is doing but no one is talking about: Complementary and alternative medicine (CAM) prevalence in the ANCA SVV population. Presse Med 2013. [DOI: 10.1016/j.lpm.2013.02.293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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von Laffert M, Berg E, Lenze D, Lohneis P, Hummel M, Dietel M. Detection of Anaplastic Lymphoma Kinase (ALK) Gene Rearrangement in Non-Small Cell Lung Cancer (NSCLC): A Glance at “Borderline” Cases. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33779-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Abstract
Anal incontinence is a disease of high prevalence. For many patients the disease causes severe stress and often results in social isolation. Whenever a sphincter lesion has been diagnosed by digital rectal examination and endosonographic access, anal sphincter reconstruction can be performed with the same results either in overlapping or in end-to-end suture technique. sing these procedures, in more than 60 % of patients the continence can be initially improved. However, benefit decreases after 5 years down to 40-50 %. The prognosis gets worse with increasing age and supplementary descending pelvic floor. Anal repair with reconstruction of internal and external sphincters is performed in neurogenic incontinence. This can be achieved by posterior or anterior anal repair (total pelvic floor repair). Nowadays these procedures are not common, due to unsuccessfulness. Instead, sacral nerve stimulation as a more expensive but less invasive method has displaced the anal repair on this indication. Interpretation of the published results remains delicate because of heterogenous evaluation criteria of postoperative outcome: subjective amelioration, postoperative satisfaction and quality of life, improvement of incontinence score or achievement of complete anal continence. However, it is proven that after immediate reconstruction of traumatic sphincter lesions the postoperative outcome is better than a two-step operation with primary ostomy.
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Affiliation(s)
- S Kersting
- Abteilung für Koloproktologie, Prosper-Hospital, Recklinghausen, Deutschland.
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Thompson C, Stortz G, Goertzen A, Berg E, Retière F, Kozlowski P, Ryner L, Sossi V. Sci-Fri AM: Imaging - 08: Comparison of single and dual layer detector blocks for pre-clinical MRI-PET. Med Phys 2012; 39:4641-4642. [PMID: 28516664 DOI: 10.1118/1.4740194] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Our group is developing a small animal PET scanner which would fit in a 7 Tesla MRI scanner to provide simultaneous PET and MR acquisitions and images. There is very little room for the PET detectors and we must use nonmagnetic materials. This presentation describes preliminary work with two PET detectors consisting of LYSO blocks each with two crystal layers: 49 1.67*1.67*6.0 mm on the bottom layer and 36 4.0 mm deep crystals on the top layer. These are mounted on SensL 4*4 arrays of silicon photo-multipliers whose outputs are multiplexed to provide three signals: Energy, X, Y. These detectors were mounted on translation stages and scanned past a 0.25 mm diameter 370 MBq Na-18 source embedded in tissue equivalent plastic. The results were compared with similar single layer crystal blocks with 10 mm deep crystals to assess the advantage of dual layer crystals to reduce radial blurring in a PET scanner with a diameter of only 64 mm. The ability to identify correctly each crystal is reported as its resolvability index, (RI), defined as the (crystal response FWHM)/(crystal's separation) in the crystal identification matrix. For the dual layer block RI =0.44, and for dual layer block RI=0.22. The coincidence response resolution for the single layer block varied from 1.23±0.05 mm at the centre of the scanner to 3.09±0.10 mm at 15.8 mm radius, while the dual layer block varied from 1.31±0.06 to 1.96±0.51 mm over the same range, confirming the Monte-Carlo simulations showing reduced radial blurring.
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Affiliation(s)
- C Thompson
- Montreal Neurological Institute, McGill University
| | | | | | | | | | | | - L Ryner
- National Research Council of Canada
| | - V Sossi
- University of British Columbia
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Berg E. Et helsevesen i ulage. Tidsskriftet 2012. [DOI: 10.4045/tidsskr.12.0791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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Berg E. Nyttig om etikk i praksis. Tidsskriftet 2012. [DOI: 10.4045/tidsskr.12.0335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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Ommer A, Herold A, Berg E, Farke S, Fürst A, Hetzer F, Köhler A, Post S, Ruppert R, Sailer M, Schiedeck T, Strittmatter B, Lenhard B, Bader W, Gschwend J, Krammer H, Stange E. S3-Leitlinie: Kryptoglanduläre Analfisteln. coloproctology 2011. [DOI: 10.1007/s00053-011-0210-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Hadler-Olsen E, Winberg JO, Reinholt FP, Larsen T, Uhlin-Hansen L, Jenssen T, Berg E, Kolset SO. Proteases in Plasma and Kidney of db/db Mice as Markers of Diabetes-Induced Nephropathy. ISRN Endocrinol 2011; 2011:832642. [PMID: 22363890 PMCID: PMC3262622 DOI: 10.5402/2011/832642] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Accepted: 05/31/2011] [Indexed: 11/29/2022]
Abstract
Db/db mice are overweight, dyslipidemic and develop diabetic complications, relevant for similar complications in human type 2 diabetes. We have used db/db and db/+ control mice to investigate alterations in proteinase expression and activity in circulation and kidneys by SDS-PAGE zymography, electron microscopy, immunohistochemistry, Western blotting, and in situ zymography. Plasma from db/db mice contained larger amounts of serine proteinases compared to db/+ mice. Kidneys from the db/db mice had a significantly larger glomerular surface area and somewhat thicker glomerular basement membranes compared to the db/+ mice. Furthermore, kidney extracts from db/+ mice contained metalloproteinases with Mr of approximately 92000, compatible with MMP-9, not observed in db/db mice. These results indicate that higher levels of serine proteinases in plasma may serve as potential markers for kidney changes in db/db mice, whereas a decrease in MMP-9 in the kidney may be related to the glomerular changes.
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Affiliation(s)
- E Hadler-Olsen
- Department of Medical Biology, University of Tromsø, 9037 Tromsø, Norway
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Schmitz KJ, Chmelar C, Berg E, Schmid KW. [Pathological work-up of rectal cancer following partial/total mesorectal excision]. Pathologe 2011; 32:321-9. [PMID: 21660476 DOI: 10.1007/s00292-011-1439-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Total mesorectal excision (TME) refers to the anatomically accurate surgical resection of the rectum from its surrounding fascias and has become the gold standard for treating rectal cancer. The pathologist plays a key role in the assessment of these specimens and good pathological reporting of rectal cancer is essential to achieving the optimum possible results for patients with rectal cancer. In experienced hands, these techniques result in a dramatic improvement in cancer-related cure rates from 45% to 75% and a reduction in pelvic recurrences from 40% to 5%-10%. Moreover, preservation of sexual and urinary functions is possible in the majority of cases. This article reviews the pathological assessment of the TME specimen in detail with regards to current international guidelines and describes its anatomical background. In addition, particular issues relating to margins, lymph node dissection and effects of neoadjuvant therapy are discussed.
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Affiliation(s)
- K J Schmitz
- Institut für Pathologie und Neuropathologie, Universitätsklinikum Essen, Universität Duisburg-Essen, Essen, Deutschland.
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Berg E, Lindner NH, Pereg-Barnea T. Metastable π junction between an s(±)-wave and an s-wave superconductor. Phys Rev Lett 2011; 106:147003. [PMID: 21561215 DOI: 10.1103/physrevlett.106.147003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2011] [Indexed: 05/30/2023]
Abstract
We examine a contact between a superconductor whose order parameter changes sign across the Brillioun zone, and an ordinary, uniform-sign superconductor. Within a Ginzburg-Landau-type model, we find that if the barrier between the two superconductors is not too high, the frustration of the Josephson coupling between different portions of the Fermi surface across the contact can lead to surprising consequences. These include time-reversal symmetry breaking at the interface and unusual energy-phase relations with multiple local minima. We propose this mechanism as a possible explanation for the half-integer flux quantum transitions in composite niobium-iron pnictide superconducting loops, which were discovered in recent experiments [C.-T. Chen et al., Nature Phys. 6, 260 (2010).].
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Affiliation(s)
- E Berg
- Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA
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Berg E. Pasientperspektiv på sykdom og lidelse. Tidsskriftet 2011. [DOI: 10.4045/tidsskr.10.1340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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