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Adolph L, Mann A, Liu XQ, Roberts L, Robinson C, Popowich S, Dean E, Kean S, Fischer G, Altman AD. Follow-up of women with cervical adenocarcinoma in situ treated by conization: A single centre clinical experience. Gynecol Oncol 2024; 187:74-79. [PMID: 38733955 DOI: 10.1016/j.ygyno.2024.05.004] [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: 12/27/2023] [Revised: 04/25/2024] [Accepted: 05/05/2024] [Indexed: 05/13/2024]
Abstract
OBJECTIVE Hysterectomy has been the historical gold standard final step in the treatment algorithm of adenocarcinoma in situ (AIS) recommended by most North American colposcopy guidelines. AIS disproportionately affects young childbearing age women, therefore a fertility sparing treatment option is desirable. Our study examines the impact of conservative treatment of AIS with conization followed by serial surveillance. METHODS A retrospective chart review was completed of patients treated for AIS from 2006 to 2020. Charts were identified by pathologic diagnosis of AIS on cervical and uterine specimens. Charts were excluded if AIS was not treated with conization, if AIS was not confirmed on initial conization specimen, or if invasive disease was found at initial conization. RESULTS 121 patient charts were analyzed. Median age of patients at first conization and hysterectomy was 34.8 and 40.9, respectively. First conization was by Cold Knife Cone in 58% of patients, and by Loop Electrosurgical Excisional Procedure in 42% of patients. Median follow-up period in our study was 609 days. 5% of patients had recurrence, with only one patient who recurred as cancer. One case of recurrence had a positive initial conization margin. Median time to recurrence was 700 days. 47% of patients underwent eventual hysterectomy. Residual AIS was found in 23% of hysterectomy specimens. Adenocarcinoma was diagnosed on hysterectomy specimen in four patients. CONCLUSION Our study demonstrates the oncologic safety of treating AIS with conization and serial surveillance. Routine hysterectomy completed as a part of the AIS treatment algorithm, as in current clinical guidelines, is unnecessary.
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Affiliation(s)
- L Adolph
- Department of Obstetrics, Gynecology and Reproductive Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada.
| | - A Mann
- Department of Obstetrics, Gynecology and Reproductive Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | - X Q Liu
- Department of Obstetrics, Gynecology and Reproductive Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | - L Roberts
- Department of Obstetrics, Gynecology and Reproductive Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada; CancerCare Manitoba, Winnipeg, Manitoba, Canada
| | - C Robinson
- Department of Obstetrics, Gynecology and Reproductive Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada; CancerCare Manitoba, Winnipeg, Manitoba, Canada
| | - S Popowich
- Department of Obstetrics, Gynecology and Reproductive Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada; CancerCare Manitoba, Winnipeg, Manitoba, Canada
| | - E Dean
- Department of Obstetrics, Gynecology and Reproductive Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada; CancerCare Manitoba, Winnipeg, Manitoba, Canada
| | - S Kean
- Department of Obstetrics, Gynecology and Reproductive Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada; CancerCare Manitoba, Winnipeg, Manitoba, Canada
| | - G Fischer
- Department of Pathology, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | - A D Altman
- Department of Obstetrics, Gynecology and Reproductive Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada; CancerCare Manitoba, Winnipeg, Manitoba, Canada
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Lee JS, Mallitt K, Fischer G, Saunderson RB. An individual patient data meta-analysis of wound care in patients with toxic epidermal necrolysis. Australas J Dermatol 2024; 65:128-142. [PMID: 38063272 DOI: 10.1111/ajd.14193] [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: 06/29/2023] [Revised: 10/20/2023] [Accepted: 11/19/2023] [Indexed: 03/10/2024]
Abstract
Toxic epidermal necrolysis (TEN) involves extensive mucocutaneous loss, and care is supportive. The approach to wound care includes surgical debridement or using dressings while leaving the epidermis intact. Robust evidence for either approach is lacking. We compared surgical debridement to the use of dressings while leaving the epidermis in situ (referred to hereon as dressings) in adult patients with TEN. The primary outcome assessed was mortality. The secondary outcome was time to re-epithelialisation. The impact of medications was evaluated. An individual patient data (IPD) systematic review and meta-analysis was undertaken. A random effects meta-analysis and survival analysis for IPD data examined mortality, re-epithelisation time and the effect of systemic medications. The quality of evidence was rated per the Grading of Recommendations Assessment, Development and Evaluation (GRADE). PROSPERO: CRD42021266611 Fifty-four studies involving 227 patients were included in the systematic review and meta-analysis, with a GRADE from very low to moderate. There was no difference in survival in patients who had surgical debridement or dressings (univariate: p = 0.91, multivariate: p = 0.31). Patients who received dressings re-epithelialised faster than patients who underwent debridement (multivariate HR: 1.96 [1.09-3.51], p = 0.023). Intravenous immunoglobulin (univariate HR: 0.21 [0.09-0.45], p < 0.001; multivariate HR: 0.22 [0.09-0.53], p < 0.001) and cyclosporin significantly reduced mortality (univariate HR: 0.09 [0.01-0.96], p = 0.046; multivariate HR: 0.06 [0.01-0.73], p = 0.028) irrespective of the wound care. This study supports the expert consensus of the dermatology hospitalists, that wound care in patients with TEN should be supportive with the epidermis left intact and supported with dressings, which leads to faster re-epithelialisation.
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Affiliation(s)
- J S Lee
- The University of Notre Dame, Darlinghurst, New South Wales, Australia
| | - K Mallitt
- Sydney School of Public Health, Faculty of Medicine, University of Sydney, Camperdown, New South Wales, Australia
- School of Psychiatry, Faculty of Medicine, UNSW Sydney, Kensington, New South Wales, Australia
| | - G Fischer
- Northern Clinical School, University of Sydney, St Leonards, New South Wales, Australia
- Department of Dermatology, Royal North Shore Hospital, St Leonards, New South Wales, Australia
| | - R B Saunderson
- Northern Clinical School, University of Sydney, St Leonards, New South Wales, Australia
- Department of Dermatology, Royal North Shore Hospital, St Leonards, New South Wales, Australia
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Fischer G, Kofler M, Baumgarten D. Implementation of N-Interval fourier transform analysis - Application to compound action potentials. MethodsX 2023; 11:102441. [PMID: 38023302 PMCID: PMC10630633 DOI: 10.1016/j.mex.2023.102441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 10/14/2023] [Indexed: 12/01/2023] Open
Abstract
N -Interval Fourier Transform Analysis (N -FTA) allows for spectral separation of a periodic target signal from uncorrelated background interference. A N -FTA pseudo-code is presented. The spectral resolution is defined by the repetition rate of the near periodic signal. Acceptance criteria for spectral targets were defined such that the probability of accepting false positives is less than 1 500 . Simulated and recorded neural compound action potentials (CAPs) were investigated. Simulated data allowed for comparison with reference solutions demonstrating the stability of N -FTA at conditions being comparable to real world data. Background activity was assessed with small errors. Evoked target components were assessed down to power spectral density being approximately N times below the background level. Validation was completed investigating a measured CAP. In neurophysiological recordings, this approach allows for accurate separation of near periodic evoked activity from uncorrelated background activities for frequencies below 1kHz.•N-FTA allows for spectral separation of a periodic target signal from uncorrelated interference by analyzing a segment containing N target signal repetitions.•A MATLAB implementation of the algorithm is provided along with simulated and recorded data.•N-FTA was successfully validated using simulated and measured data for CAPs.
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Affiliation(s)
- G. Fischer
- Institute of Electrical and Biomedical Engineering, UMIT – Private University for Health Sciences and Health Technology, Eduard Wallnoefer Zentrum 1, 6060 Hall in Tirol, Austria
| | - M. Kofler
- Department of Neurology, Hochzirl Hospital, 6170 Zirl, Austria
| | - D. Baumgarten
- Institute of Electrical and Biomedical Engineering, UMIT – Private University for Health Sciences and Health Technology, Eduard Wallnoefer Zentrum 1, 6060 Hall in Tirol, Austria
- Institute of Biomedical Engineering and Informatics, Technische Universitt Ilmenau, G.-Kirchhoff-Str. 2, 98693 Ilmenau, Germany
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Arranz F, Lehmann T, Rauscher F, Fischer G, Koehler S, Garrido J, Rouret M, Sanchez-Herranz D. Logistics and maintenance research activities for DONES facility. Fusion Engineering and Design 2023. [DOI: 10.1016/j.fusengdes.2023.113630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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5
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Atteneder C, Moayedifar R, Koren D, Fischer G, Nackenhorst M, Böhmig G, Laufer G, Zuckermann A. CD 38 Antibody Daratumumab in Allosensitized Recipients for Cardiac Transplantation - A Case Series. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.087] [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: 04/05/2023] Open
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Jaksch P, Muraközy G, Benazzo A, Kovacs Z, Hoetzenecker K, Fischer G. Donor Derived Cell Free Dna after Lung Transplantation: Marker for Acute and Chronic Lung Allograft Injury? J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1397] [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: 04/05/2023] Open
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Schwarz S, Fruhmann N, Benazzo A, Koren D, Fischer G, Jaksch P, Hoetzenecker K. Unlike the US-LAS, the Eurotransplant-LAS is Not a Risk Factor for De-Novo Donor Specific Antibodies. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1413] [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: 04/05/2023] Open
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8
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Helmecke T, Hahn D, Matzke N, Ferdinand L, Franke L, Kühn S, Fischer G, Werner C, Maitz MF. Inflammation-Controlled Anti-Inflammatory Hydrogels. Adv Sci (Weinh) 2023; 10:e2206412. [PMID: 36581490 PMCID: PMC9982591 DOI: 10.1002/advs.202206412] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/06/2022] [Indexed: 06/17/2023]
Abstract
While autoregulative adaptation is a common feature of living tissues, only a few feedback-controlled adaptive biomaterials are available so far. This paper herein reports a new polymer hydrogel platform designed to release anti-inflammatory molecules in response to the inflammatory activation of human blood. In this system, anti-inflammatory peptide drugs, targeting either the complement cascade, a complement receptor, or cyclophilin A, are conjugated to the hydrogel by a peptide sequence that is cleaved by elastase released from activated granulocytes. As a proof of concept, the adaptive drug delivery from the gel triggered by activated granulocytes and the effect of the released drug on the respective inflammatory pathways are demonstrated. Adjusting the gel functionalization degree is shown to allow for tuning the drug release profiles to effective doses within a micromolar range. Feedback-controlled delivery of covalently conjugated drugs from a hydrogel matrix is concluded to provide valuable safety features suitable to equip medical devices with highly active anti-inflammatory agents without suppressing the general immunosurveillance.
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Affiliation(s)
- Tina Helmecke
- Leibniz Institute of Polymer Research DresdenInstitute of Biofunctional Polymer MaterialsHohe Strasse 601069DresdenGermany
| | - Dominik Hahn
- Leibniz Institute of Polymer Research DresdenInstitute of Biofunctional Polymer MaterialsHohe Strasse 601069DresdenGermany
| | - Nadine Matzke
- Leibniz Institute of Polymer Research DresdenInstitute of Biofunctional Polymer MaterialsHohe Strasse 601069DresdenGermany
| | - Lisa Ferdinand
- Leibniz Institute of Polymer Research DresdenInstitute of Biofunctional Polymer MaterialsHohe Strasse 601069DresdenGermany
| | - Lars Franke
- Max Planck Institute for Multidisciplinary Sciences37077GöttingenGermany
| | - Sebastian Kühn
- Leibniz Institute of Polymer Research DresdenInstitute of Biofunctional Polymer MaterialsHohe Strasse 601069DresdenGermany
| | - Gunter Fischer
- Max Planck Institute for Multidisciplinary Sciences37077GöttingenGermany
| | - Carsten Werner
- Leibniz Institute of Polymer Research DresdenInstitute of Biofunctional Polymer MaterialsHohe Strasse 601069DresdenGermany
- Technische Universität DresdenCluster of Excellence Physics of LifeCenter for Regenerative Therapies Dresden and Faculty of Chemistry and Food ChemistryFetscherstraße 10501307DresdenGermany
| | - Manfred F. Maitz
- Leibniz Institute of Polymer Research DresdenInstitute of Biofunctional Polymer MaterialsHohe Strasse 601069DresdenGermany
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9
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Rolfs N, Schwarzkopf E, Mentzer D, Opgen-Rhein B, Hellwig R, Frede W, Rentzsch A, Hecht T, Böhne M, Kiski D, Graumann I, Foth R, Fischer G, Voges I, Schweigmann U, Ruf B, Fischer M, Pattathu J, Wiegand G, Kramp J, Pickardt T, Messroghli D, Schubert S, Seidel F. Clinical Course and Short-Term Follow-up of SARS-CoV-2 Vaccine–Related Myocarditis in Children and Adolescents within the Prospective German Registry for Suspected Myocarditis “MYKKE”. Thorac Cardiovasc Surg 2023. [DOI: 10.1055/s-0043-1761868] [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: 03/22/2023]
Affiliation(s)
- N. Rolfs
- German Heart Institute Berlin, Berlin, Deutschland
| | | | - D. Mentzer
- Paul Ehrlich Institute, Langen (Hessen), Deutschland
| | - B. Opgen-Rhein
- Pediatric Cardiology, Charité-Universitätsmedizin Berlin, Berlin, Deutschland
| | - R. Hellwig
- University Hospital Heidelberg, Heidelberg, Deutschland
| | - W. Frede
- University Hospital Heidelberg, Heidelberg, Deutschland
| | - A. Rentzsch
- Pediatric Cardiology, Universitätsklinikum des Saarlandes, Homburg, Deutschland
| | - T. Hecht
- HDZ NRW, Bad Oeynhausen, Deutschland
| | - M. Böhne
- Pediatric Cardiology, Medizinische Hochschule Hannover, Hannover, Deutschland
| | - D. Kiski
- Pediatric Cardiology, Universitätsklinikum Münster, Münster, Deutschland
| | - I. Graumann
- University Hospital Halle (Saale), Halle (Saale), Deutschland
| | - R. Foth
- University Medicine Göttingen, Göttingen, Deutschland
| | - G. Fischer
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - I. Voges
- Universitätsklinikum Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | | | - B. Ruf
- Pediatric Cardiology, Deutsches Herzzentrum München, Munich, Deutschland
| | - M. Fischer
- Ludwig Maximilian University of Munich, München, Deutschland
| | - J. Pattathu
- Ludwig Maximilian University of Munich, München, Deutschland
| | - G. Wiegand
- Department of Pediatric Cardiology, University of Tuebingen, Deutschland
| | - J. Kramp
- Uniklinik Köln, Köln, Deutschland
| | - T. Pickardt
- Competence Network for Congenital Heart Defects, Berlin, Deutschland
| | - D. Messroghli
- Department for Cardiology, Deutsches Herzzentrum Berlin, Berlin, Deutschland
| | | | - F. Seidel
- Augustenburger Platz 1, Berlin, Deutschland
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Abstract
Cyclophilins, enzymes with peptidyl-prolyl cis/trans isomerase activity, are relevant to a large variety of biological processes. The most abundant member of this enzyme family, cyclophilin A, is the cellular receptor of the immunosuppressive drug cyclosporine A (CsA). As a consequence of the pathophysiological role of cyclophilins, particularly in viral infections, there is a broad interest in cyclophilin inhibition devoid of immunosuppressive activity. This Review first gives an introduction into the physiological and pathophysiological roles of cyclophilins. The presentation of non-immunosuppressive cyclophilin inhibitors will commence with drugs based on chemical modifications of CsA. The naturally occurring macrocyclic sanglifehrins have become other lead structures for cyclophilin-inhibiting drugs. Finally, de novo designed compounds, whose structures are not derived from or inspired by natural products, will be presented. Relevant synthetic concepts will be discussed, but the focus will also be on biochemical studies, structure-activity relationships, and clinical studies.
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Affiliation(s)
- Cordelia Schiene‐Fischer
- Institute of Biochemistry and BiotechnologyMartin-Luther-University Halle-Wittenberg06099Halle (Saale)Germany
| | - Gunter Fischer
- Max Planck Institute for Biophysical Chemistry37077GöttingenGermany
| | - Manfred Braun
- Institute of Organic and Macromolecular ChemistryHeinrich-Heine-University Düsseldorf40225DüsseldorfGermany
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11
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Wu SY, Ye SY, Fischer G, Taubenschuss U, Jackman CM, O'Dwyer E, Kurth WS, Yao S, Yao ZH, Menietti JD, Xu Y, Long MY, Cecconi B. Saturn Anomalous Myriametric Radiation, a New Type of Saturn Radio Emission Revealed by Cassini. Geophys Res Lett 2022; 49:e2022GL099237. [PMID: 36249464 PMCID: PMC9541930 DOI: 10.1029/2022gl099237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 07/28/2022] [Accepted: 08/01/2022] [Indexed: 06/16/2023]
Abstract
A new radio component namely Saturn Anomalous Myriametric Radiation (SAM) is reported. A total of 193 SAM events have been identified by using all the Cassini Saturn orbital data. SAM emissions are L-O mode radio emission and occasionally accompanied by a first harmonic in R-X mode. SAM's intensities decrease with increasing distance from Saturn, suggesting a source near Saturn. SAM has a typical central frequency near 13 kHz, a bandwidth greater than 8 kHz and usually drifts in frequency over time. SAM's duration can extend to near 11 hr and even longer. These features distinguish SAM from the regular narrowband emissions observed in the nearby frequency range, hence the name anomalous. The high occurrence rate of SAM after low frequency extensions of Saturn Kilometric Radiation and the SAM cases observed during compressions of Saturn's magnetosphere suggest a special connection to solar wind dynamics and magnetospheric conditions at Saturn.
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Affiliation(s)
- S. Y. Wu
- Department of Earth and Space SciencesSouthern University of Science and TechnologyShenzhenPeople's Republic of China
- LESIAObservatoire de ParisUniversité PSLCNRSSorbonne UniversitéUniversité de ParisMeudonFrance
| | - S. Y. Ye
- Department of Earth and Space SciencesSouthern University of Science and TechnologyShenzhenPeople's Republic of China
| | - G. Fischer
- Space Research InstituteAustrian Academy of SciencesGrazAustria
| | - U. Taubenschuss
- Department of Space PhysicsInstitute of Atmospheric Physics of the Czech Academy of SciencesPragueCzechia
| | - C. M. Jackman
- School of Cosmic PhysicsDIAS Dunsink ObservatoryDublin Institute for Advanced StudiesDublinIreland
| | - E. O'Dwyer
- School of Cosmic PhysicsDIAS Dunsink ObservatoryDublin Institute for Advanced StudiesDublinIreland
| | - W. S. Kurth
- Department of Physics and AstronomyUniversity of IowaIowa CityIAUSA
| | - S. Yao
- School of Geophysics and Information TechnologyChina University of Geosciences (Beijing)BeijingPeople's Republic of China
| | - Z. H. Yao
- Key Laboratory of Earth and Planetary PhysicsInstitute of Geology and GeophysicsChinese Academy of SciencesBeijingPeople's Republic of China
| | - J. D. Menietti
- Department of Physics and AstronomyUniversity of IowaIowa CityIAUSA
| | - Y. Xu
- Key Laboratory of Earth and Planetary PhysicsInstitute of Geology and GeophysicsChinese Academy of SciencesBeijingPeople's Republic of China
| | - M. Y. Long
- Department of Space PhysicsSchool of Electronic InformationWuhan UniversityWuhanPeople's Republic of China
| | - B. Cecconi
- LESIAObservatoire de ParisUniversité PSLCNRSSorbonne UniversitéUniversité de ParisMeudonFrance
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Euclide PT, Jasonowicz A, Sitar S, Fischer G, Goetz FW. Further evidence from common garden rearing experiments of heritable traits separating lean and siscowet lake charr (Salvelinus namaycush) ecotypes. Mol Ecol 2022; 31:3432-3450. [PMID: 35510796 PMCID: PMC9323484 DOI: 10.1111/mec.16492] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 03/07/2022] [Accepted: 04/12/2022] [Indexed: 11/30/2022]
Abstract
Genetic evidence of selection for complex and polygenically regulated phenotypes can easily become masked by neutral population genetic structure and phenotypic plasticity. Without direct evidence of genotype‐phenotype associations it can be difficult to conclude to what degree a phenotype is heritable or a product of environment. Common garden laboratory studies control for environmental stochasticity and help to determine the mechanism that regulate traits. Here we assess lipid content, growth, weight, and length variation in full and hybrid F1 crosses of deep and shallow water sympatric lake charr ecotypes reared for nine years in a common garden experiment. Redundancy analysis (RDA) and quantitative‐trait‐loci (QTL) genomic scans are used to identify associations between genotypes at 19,714 single nucleotide polymorphisms (SNPs) aligned to the lake charr genome and individual phenotypes to determine the role that genetic inheritance plays in ecotype phenotypic diversity. Lipid content, growth, length, and weight differed significantly among lake charr crosses throughout the experiment suggesting that pedigree plays a large roll in lake charr development. Polygenic scores of 15 SNPs putatively associated with lipid content and/or condition factor indicated that ecotype distinguishing traits are polygenically regulated and additive. A QTL identified on chromosome 38 contained >200 genes, some of which were associated with lipid metabolism and growth, demonstrating the complex nature of ecotype diversity. The results of our common garden study further indicate that lake charr ecotypes observed in nature are predetermined at birth and that ecotypes differ fundamentally in lipid metabolism and growth.
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Affiliation(s)
- P T Euclide
- Purdue University, Department of Forestry and Natural Resources, West Lafayette, IN, 47907, USA
| | - A Jasonowicz
- The International Halibut Commission, 2320 West Commodore Way, Suite 300, Seattle, WA, 98199-1287, USA
| | - S Sitar
- Michigan Department of Natural Resources, Marquette Fisheries Research Station, 484 Cherry Creek Rd., Marquette, MI, 49855, USA
| | - G Fischer
- University of Wisconsin-Stevens Point, Northern Aquaculture Demonstration Facility, 36445 State Hwy 13, Bayfield, WI, 54814, USA
| | - F W Goetz
- University of Wisconsin - Milwaukee, School of Freshwater Sciences, 600 East Greenfield Ave., Milwaukee, WI, 53204, USA
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13
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Wu SY, Ye SY, Fischer G, Jackman CM, Wang J, Menietti JD, Cecconi B, Long MY. Reflection and Refraction of the L-O Mode 5 kHz Saturn Narrowband Emission by the Magnetosheath. Geophys Res Lett 2022; 49:e2021GL096990. [PMID: 35859935 PMCID: PMC9285440 DOI: 10.1029/2021gl096990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 02/10/2022] [Accepted: 02/12/2022] [Indexed: 06/15/2023]
Abstract
The reflection-by-sheath mechanism of 5 kHz narrowband emissions (NB) at Saturn is confirmed by Cassini observations during several crossings of the magnetopause, which show that the 5 kHz NB can be prevented from escaping Saturn's magnetosphere. The L-O mode 5 kHz NB remained visible in areas of low plasma density but disappeared in regions of high plasma density. In three cases, NB disappeared immediately after the crossings of Saturn's magnetopause. A possible reflected NB event observed near the magnetosheath is discussed. This mechanism can help explain the 5 kHz NB observed at low latitudes outside the Enceladus plasma torus and their upper frequency limit variations. This mechanism significantly improves the current understanding of the 5 kHz NB.
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Affiliation(s)
- S. Y. Wu
- Department of Earth and Space SciencesSouthern University of Science and TechnologyShenzhenPeople's Republic of China
| | - S. Y. Ye
- Department of Earth and Space SciencesSouthern University of Science and TechnologyShenzhenPeople's Republic of China
| | - G. Fischer
- Space Research InstituteAustrian Academy of SciencesGrazAustria
| | - C. M. Jackman
- School of Cosmic PhysicsDublin Institute for Advanced StudiesDublinIreland
| | - J. Wang
- Department of Earth and Space SciencesSouthern University of Science and TechnologyShenzhenPeople's Republic of China
| | - J. D. Menietti
- Department of Physics and AstronomyUniversity of IowaIowa CityIAUSA
| | - B. Cecconi
- LESIA, Observatoire de ParisUniversité PSLCNRSSorbonne UniversitéUniversité de Paris MeudonParisFrance
| | - M. Y. Long
- Department of Space PhysicsSchool of Electronic InformationWuhan UniversityWuhanPeople's Republic of China
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14
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Braun M, Schiene-Fischer C, Fischer G. Non‐Immunosuppressive Cyclophilin Inhibitors. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201597] [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: 11/12/2022]
Affiliation(s)
- Manfred Braun
- Heinrich-Heine-Universität Düsseldorf: Heinrich-Heine-Universitat Dusseldorf Organic CHemistry Universitätsstr. 1 40225 Düsseldorf GERMANY
| | - Cordelia Schiene-Fischer
- Martin-Luther-Universität Halle-Wittenberg: Martin-Luther-Universitat Halle-Wittenberg Institute of Biochemistry and Biotechnology, GERMANY
| | - Gunter Fischer
- Max-Planck-Institut für Biophysikalische Chemie Abteilung Meiosis: Max-Planck-Institut fur Multidisziplinare Naturwissenschaften Abteilung Meiosis Max Planck Institute for Biophysical Chemistry GERMANY
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15
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Armbrust J, Hansen JH, Kramer HH, Radtke W, Scheewe J, Uebing A, Fischer G. Outcomes following Balloon Aortic Valvuloplasty in Congenital Aortic Valve Stenosis: A Single Centre Experience over 30 Years. Thorac Cardiovasc Surg 2022. [DOI: 10.1055/s-0042-1742978] [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: 10/18/2022]
Affiliation(s)
- J. Armbrust
- Department of Congenital Heart Disease and Pediatric Cardiology, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - J. H. Hansen
- Department of Congenital Heart Disease and Pediatric Cardiology, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - H.-H. Kramer
- Department of Congenital Heart Disease and Pediatric Cardiology, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - W. Radtke
- Pediatric Cardiology, Nemours Children's Hospital, Delaware, Wilmington, United States
| | - J. Scheewe
- Department of Cardiovascular Surgery, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - A. Uebing
- Department of Congenital Heart Disease and Pediatric Cardiology, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - G. Fischer
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
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Arp N, Hansen JH, Rinne K, Fischer G, Scheewe J, Attmann T, Uebing A. Outcomes after Arterial Switch Operation for Transposition of the Great Arteries—Survival, Reoperations, Reinterventions, and Coronary Complications. Thorac Cardiovasc Surg 2022. [DOI: 10.1055/s-0042-1742946] [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: 10/18/2022]
Affiliation(s)
- N. Arp
- Department of Congenital Heart Disease and Pediatric Cardiology, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - J. H. Hansen
- Department of Congenital Heart Disease and Pediatric Cardiology, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - K. Rinne
- Department of Congenital Heart Disease and Pediatric Cardiology, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - G. Fischer
- Department of Congenital Heart Disease and Pediatric Cardiology, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - J. Scheewe
- Department of Cardiovascular Surgery, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - T. Attmann
- Department of Cardiovascular Surgery, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - A. Uebing
- Department of Congenital Heart Disease and Pediatric Cardiology, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
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17
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Uden T, Seidel F, Opgen-Rhein B, Boecker D, Wannenmacher B, Rentzsch A, Reineker K, Böhne M, Wiegand G, Hecht T, Blank AE, Fischer M, Kaestner M, Steinmetz M, Freudenthal N, Fischer G, Ruf B, Boethig D, Pickardt T, Beerbaum P, Schubert S, Messroghli D. Scar and Edema Imaging by CMR in Pediatric Myocarditis—Preliminary Results from the MYKKE-Registry. Thorac Cardiovasc Surg 2022. [DOI: 10.1055/s-0042-1742958] [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: 10/18/2022]
Affiliation(s)
- T. Uden
- Medizinische Hochschule Hannover, Hannover, Deutschland
| | - F. Seidel
- German Heart Institute Berlin, Berlin, Deutschland
| | - B. Opgen-Rhein
- Charité – Universitätsmedizin Berlin, Berlin, Deutschland
| | - D. Boecker
- University Hospital Erlangen, Erlangen, Deutschland
| | - B. Wannenmacher
- Kinderkardiologie, Herzzentrum Leipzig, Leipzig, Deutschland
| | - A. Rentzsch
- Saarland University Medical Center, Homburg an der Saar, Deutschland
| | - K. Reineker
- Department of Congenital Heart Disease and Paediatric Cardiology, University Heart Centre Freiburg - Bad Krozingen, Medical Centre-University of Freiburg, Freiburg, Deutschland
| | - M. Böhne
- Medizinische Hochschule Hannover, Hannover, Deutschland
| | - G. Wiegand
- Department of Pediatric Cardiology, University of Tuebingen, Tübingen, Deutschland
| | - T. Hecht
- HDZ NRW, Bad Oeynhausen, Deutschland
| | - A.-E. Blank
- Pediatric Heart Center, Giessen, Deutschland
| | - M. Fischer
- Klinikum der Universität München, München, Deutschland
| | | | - M. Steinmetz
- University Medicine Göttingen, Göttingen, Deutschland
| | - N. Freudenthal
- Pediatric Cardiology, Universitätsklinikum Bonn, Bonn, Deutschland
| | - G. Fischer
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - B. Ruf
- Pediatric Cardiology, Deutsches Herzzentrum München, Munich, Deutschland
| | - D. Boethig
- Medizinische Hochschule Hannover, Hannover, Deutschland
| | - T. Pickardt
- Competence Network for Congenital Heart Defects, Berlin, Deutschland
| | - P. Beerbaum
- Medizinische Hochschule Hannover, Hannover, Deutschland
| | - S. Schubert
- German Heart Institute Berlin, Berlin, Deutschland
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18
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Picoli T, Peter C, Lopes M, Barcelos L, Varela Júnior A, Corcini C, Hübner S, Vargas G, Lima M, Fischer G. Melittin-induced metabolic changes on the Madin-Darby Bovine Kidney cell line. ARQ BRAS MED VET ZOO 2021. [DOI: 10.1590/1678-4162-12150] [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: 11/22/2022] Open
Abstract
ABSTRACT In this study, the toxic effects of melittin on Madin-Darby Bovine Kidney cells (MDBK) were analyzed with respect to mitochondrial functionality by reduction of MTT and flow cytometry, apoptosis potential, necrosis, oxygen reactive species (ROS) production, lipid peroxidation, and DNA fragmentation using flow cytometry and cell membrane destabilization by confocal microscopy. The toxicity presented dose-dependent characteristics and mitochondrial activity was inhibited by up to 78.24 ±3.59% (P<0.01, n = 6) in MDBK cells exposed to melittin (10μg/mL). Flow cytometry analysis revealed that melittin at 2μg/mL had the highest necrosis rate (P<0.05) for the cells. The lipoperoxidation of the membranes was also higher at 2μg/mL of melittin (P<0.05), which was further confirmed by the microphotographs obtained by confocal microscopy. The highest ROS production occurred when the cells were exposed to 2.5μg/mL melittin (P<0.05), and this concentration also increased DNA fragmentation (P<0.05). There was a significative and positive correlation between the lipoperoxidation of membranes with ROS (R=0.4158), mitochondrial functionality (R=0.4149), and apoptosis (R=0.4978). Thus, the oxidative stress generated by melittin culminates in the elevation of intracellular ROS that initiates a cascade of toxic events in MDBK cells.
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Affiliation(s)
- T. Picoli
- Universidade Federal de Pelotas, Brazil
| | | | | | | | | | | | | | | | - M. Lima
- Universidade Federal de Pelotas, Brazil
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19
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Kaur R, Masisi K, Molaei M, Le K, Fischer G, Kobue-Lekalake R, Moghadasian MH. Anti-atherogenic properties of Kgengwe ( Citrullus lanatus) seed powder in low-density lipoprotein receptor knockout mice are mediated through beneficial alterations in inflammatory pathways. Appl Physiol Nutr Metab 2021; 46:169-177. [PMID: 32846097 DOI: 10.1139/apnm-2020-0015] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Kgengwe fruits are commonly consumed in sub-Saharan countries. Recent reports indicated low coronary artery disease rates in those regions. To investigate anti-atherogenic properties and potential mechanisms of action of Kgengwe seed powder (KSP), male low-density lipoprotein receptor knockout (LDL-r-KO) mice were fed with an atherogenic diet supplemented with (treated, n = 10) or without (controls, n = 10) 10% (w/w) KSP for 20 weeks. Proximate analysis revealed that KSP contained 38% fibre and 15% lipids. KSP supplementation was not associated with significant changes in body weight gain rate, food intake, and plasma lipid levels. However, the average atherosclerotic lesion size in the aortic roots in the KSP-treated group was 58% smaller than that in the control group (0.26 vs 0.11 mm2, p < 0.05). This strong anti-atherogenic effect was associated with significant increases in the average plasma levels of certain cytokines such as IL-10 (6 vs 13 pg/mL, p < 0.05), GM-CSF (0.1 vs 0.2 pg/mL, p < 0.05), and EPO (7 vs 16 pg/mL, p < 0.05) along with reductions in the average levels of plasma MCP-1 (19 vs 14 pg/mL, p < 0.05) and MIP-2 (28 vs 13 pg/mL, p < 0.05). Except for relatively high levels of saturated fatty acids, KSP possesses balanced nutrient compositions with strong anti-atherogenic properties, which may be mediated through alterations in inflammatory pathways. Additional studies warrant confirmation and mechanism(s) of action of such effects. Novelty: Kgengwe seeds prevent atherogenesis in LDL-r-KO mice. Kgengwe seeds increase circulating levels of IL-10 and EPO. No reduction in plasma total cholesterol levels.
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Affiliation(s)
- R Kaur
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- The Canadian Centre for Agri-Food Research in Health and Medicine, St Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
| | - K Masisi
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- The Canadian Centre for Agri-Food Research in Health and Medicine, St Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
| | - M Molaei
- The Canadian Centre for Agri-Food Research in Health and Medicine, St Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
| | - K Le
- The Canadian Centre for Agri-Food Research in Health and Medicine, St Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
| | - G Fischer
- Department of Pathology, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB R3E 3P5, Canada
| | - R Kobue-Lekalake
- Department of Food Science and Technology, Botswana University of Agriculture and Natural Resources, Botswana
| | - M H Moghadasian
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- The Canadian Centre for Agri-Food Research in Health and Medicine, St Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
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20
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Picoli T, Peter C, Lopes M, Barcelos L, Varela Júnior A, Corcini C, Lima M, Hübner S, Vargas G, Fischer G. Apamin-induced alterations in J774 1.6 macrophage metabolism. ARQ BRAS MED VET ZOO 2020. [DOI: 10.1590/1678-4162-11680] [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: 11/21/2022] Open
Abstract
ABSTRACT Among the immune system cells, macrophages have an important role. Apamin, a bee venom constituent, is important in the defense of these insects. Thus, we aimed to evaluate the metabolism of J774 1.6 macrophage cell line when exposed to isolated and purified apamin, using cytotoxicity tests by MTT reduction and analysis by flow cytometry (apoptosis / necrosis, production of reactive oxygen species (ROS), membranous lipoperoxidation (LPO), electrical potential of the mitochondrial membrane (mMP) and DNA fragmentation). None of the tested concentrations (10 to 100μg/mL) were cytotoxic according to MTT reductions. Apoptosis rates decreased at concentrations of 2.5, 5.0, and 10.0μg/mL (P<0.05), while necrosis rates increased (P<0.05). However, rates of healthy cells at the highest tested concentration (10μg/mL) did not differ from control (P>0.05). Apamin did not alter ROS, LPO, or DNA fragmentation. Therefore, all analyzed concentrations (1.25 to 10μg/mL) decreased mMP. Such decrease in apoptosis might be due to a suppression of mitochondrial pro-apoptotic messengers, as this peptide causes no oxidative stress, lipid peroxidation, and DNA damage. Highly sensitive techniques are majorly important for proper interpretation of cellular toxicity mechanisms, combined with routine laboratory methods.
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Affiliation(s)
- T. Picoli
- Universidade Federal de Pelotas, Brazil
| | | | | | | | | | | | - M. Lima
- Universidade Federal de Pelotas, Brazil
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21
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Casadei-Ferreira A, Fischer G, Economo EP. Evidence for a thoracic crop in the workers of some Neotropical Pheidole species (Formicidae: Myrmicinae). Arthropod Struct Dev 2020; 59:100977. [PMID: 32818807 DOI: 10.1016/j.asd.2020.100977] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/21/2020] [Accepted: 07/21/2020] [Indexed: 06/11/2023]
Abstract
The ability of ant colonies to transport, store, and distribute food resources through trophallaxis is a key advantage of social life. Nonetheless, how the structure of the digestive system has adapted across the ant phylogeny to facilitate these abilities is still not well understood. The crop and proventriculus, structures in the ant foregut (stomodeum), have received most attention for their roles in trophallaxis. However, potential roles of the esophagus have not been as well studied. Here, we report for the first time the presence of an auxiliary thoracic crop in Pheidole aberrans and Pheidole deima using X-ray micro-computed tomography and 3D segmentation. Additionally, we describe morphological modifications involving the endo- and exoskeleton that are associated with the presence of the thoracic crop. Our results indicate that the presence of a thoracic crop in major workers suggests their potential role as repletes or live food reservoirs, expanding the possibilities of tasks assumed by these individuals in the colony. Our contribution emphasizes the utility of combining data from external and internal morphology to better understand functional and behavioral mechanisms.
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Affiliation(s)
- A Casadei-Ferreira
- Departamento de Zoologia, Universidade Federal do Paraná, Avenida Francisco Heráclito dos Santos, s/n, Centro Politécnico, Curitiba, Mailbox 19020, CEP 81531-980, Brazil.
| | - G Fischer
- Biodiversity and Biocomplexity Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna, Okinawa, 904-0495, Japan.
| | - E P Economo
- Biodiversity and Biocomplexity Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna, Okinawa, 904-0495, Japan.
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22
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El-Sendiony M, Gabsi A, Holmer B, Fischer G, Schmitt M, Goldmann K, Grüßner S. Primäre intakte omentale Bauchhöhlenschwangerschaft – ein seltenes Ereignis. Geburtshilfe Frauenheilkd 2020. [DOI: 10.1055/s-0040-1718260] [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: 10/23/2022] Open
Affiliation(s)
- M El-Sendiony
- Klinik für Frauenheilkunde und Geburtshilfe, Klinikum Wilhelmshaven
| | - A Gabsi
- Klinik für Frauenheilkunde und Geburtshilfe, Klinikum Wilhelmshaven
| | - B Holmer
- Klinik für Frauenheilkunde und Geburtshilfe, Klinikum Wilhelmshaven
| | - G Fischer
- Überregionales Institut für Pathologie
| | - M Schmitt
- Medizinische Klinik II, Klinikum Wilhelmshaven
| | - K Goldmann
- Klinik für Anästhesiologie, Klinikum Wilhelmshaven
| | - S Grüßner
- Klinik für Frauenheilkunde und Geburtshilfe, Klinikum Wilhelmshaven
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23
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Forward E, Lee G, Fischer G. Shades of grey: what is paediatric psoriasiform dermatitis and what does it have in common with childhood psoriasis? Clin Exp Dermatol 2020; 46:65-73. [PMID: 32735691 DOI: 10.1111/ced.14373] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 05/16/2020] [Accepted: 07/06/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND While the majority of children with a chronic itchy rash suffer from atopic dermatitis (AD) and other forms of dermatitis, psoriasis is in the differential diagnosis. Certain patterns such as guttate and napkin psoriasis are accepted as classic paediatric psoriasis (PP); however, there are many patients who do not fit these classic forms of PP nor fulfil the accepted criteria for AD. 'Psoriasiform dermatitis' (PD) is a term that has been used for these patients; however, it has not been formally defined. Identification of this group of patients, who although not having the typical clinical features of psoriasis, respond well to psoriasis-specific treatment, may assist treatment decisions for these patients. AIM To describe PD and compare it with typical PP. METHODS Patients with classic PP (n = 109) were compared with a control group with AD (n = 449) and assessed for 21 clinical features associated with PP. Multivariate nonlinear regression analyses determined which features best separated the groups. Patients with dermatitis who demonstrated any of these 21 features (n = 43), which were used to diagnose PD, were then compared with the PP and AD groups. They were managed with psoriasis-specific treatment and Psoriasis Area and Severity Index (PASI) was recorded. RESULTS Of the 21 clinical features, 12 were found to clearly separate the classic PP and AD groups. Using the eight most significant (P < 0.0001) features, we found these two groups clearly separated at a score of 3 out of 8. Children with PD with ≥ 4 of these features responded well to treatment for psoriasis with a mean reduction of PASI by 85% at 6 weeks. CONCLUSIONS We found that patients with dermatitis who have ≥ 4 psoriasis-associated features may have a condition that has been previously alluded to but not defined in the literature, 'psoriasiform dermatitis'. Treatments usually reserved for patients with psoriasis appear to be effective in these patients.
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Affiliation(s)
- E Forward
- Department of Dermatology, Royal North Shore Hospital, St Leonards, NSW, Australia
| | - G Lee
- Department of Dermatology, Royal North Shore Hospital, St Leonards, NSW, Australia
| | - G Fischer
- Department of Dermatology, Royal North Shore Hospital, St Leonards, NSW, Australia
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24
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Hack CC, Häberle L, Brucker SY, Janni W, Volz B, Loehberg CR, Hartkopf AD, Walter CB, Baake G, Fridman A, Malter W, Wuerstlein R, Harbeck N, Hoffmann O, Kuemmel S, Martin B, Thomssen C, Graf H, Wolf C, Lux MP, Bayer CM, Rauh C, Almstedt K, Gass P, Heindl F, Brodkorb T, Willer L, Lindner C, Kolberg HC, Krabisch P, Weigel M, Steinfeld-Birg D, Kohls A, Brucker C, Schulz V, Fischer G, Pelzer V, Rack B, Beckmann MW, Fehm T, Rody A, Maass N, Hein A, Fasching PA, Nabieva N. Complementary and alternative medicine and musculoskeletal pain in the first year of adjuvant aromatase inhibitor treatment in early breast cancer patients. Breast 2020; 50:11-18. [PMID: 31958661 PMCID: PMC7377331 DOI: 10.1016/j.breast.2019.12.017] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 12/30/2019] [Accepted: 12/31/2019] [Indexed: 12/25/2022] Open
Abstract
Background Patients with breast cancer (BC) show strong interest in complementary and alternative medicine (CAM), particularly for adverse effects of adjuvant endocrine treatment — e.g., with letrozole. Letrozole often induces myalgia/limb pain and arthralgia, with potential noncompliance and treatment termination. This analysis investigated whether CAM before aromatase inhibitor (AI) therapy is associated with pain development and the intensity of AI-induced musculoskeletal syndrome (AIMSS) during the first year of treatment. Patients and methods The multicenter phase IV PreFace study evaluated letrozole therapy in postmenopausal, hormone receptor–positive patients with early BC. Patients were asked about CAM use before, 6 months after, and 12 months after treatment started. They recorded pain every month for 1 year in a diary including questions about pain and numeric pain rating scales. Data were analyzed for patients who provided pain information for all time points. Results Of 1396 patients included, 901 (64.5%) had used CAM before AI treatment. Throughout the observation period, patients with CAM before AI treatment had higher pain values, for both myalgia/limb pain and arthralgia, than non-users. Pain increased significantly in both groups over time, with the largest increase during the first 6 months. No significant difference of pain increase was noted regarding CAM use. Conclusions CAM use does not prevent or improve the development of AIMSS. Pain intensity was generally greater in the CAM group. Therefore, because of the risk of non-compliance and treatment discontinuation due to the development of higher pain levels, special attention must be paid to patient education and aftercare in these patients. Pain levels of myalgia/limb pain and arthralgia increase under letrozole intake. Within one year pain levels increase in both, CAM users as well as non-CAM users. In CAM users pain levels were higher at all time points than in non-CAM users. The greatest increase of pain levels was noted in the first six treatment months. CAM does not prevent or improve the development of myalgia/limb pain and arthralgia.
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Affiliation(s)
- C C Hack
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - L Häberle
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany; Biostatistics Unit, Department of Gynecology, Erlangen University Hospital, Erlangen, Germany
| | - S Y Brucker
- Department of Gynecology, University of Tübingen, Tübingen, Germany
| | - W Janni
- Department of Gynecology, Ulm University Hospital, Ulm, Germany
| | - B Volz
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - C R Loehberg
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany; St. Theresien Hospital, Nuremberg, Germany
| | - A D Hartkopf
- Department of Gynecology, University of Tübingen, Tübingen, Germany
| | - C-B Walter
- Department of Gynecology, University of Tübingen, Tübingen, Germany
| | - G Baake
- Oncological Medical Practice Pinneberg, Pinneberg, Germany
| | - A Fridman
- Breast Center, Department of Obstetrics and Gynecology, University of Cologne Hospital, Cologne, Germany; Evangelisches Krankenhaus Kalk, Cologne, Germany
| | - W Malter
- Breast Center, Department of Obstetrics and Gynecology, University of Cologne Hospital, Cologne, Germany
| | - R Wuerstlein
- Breast Center, Department of Obstetrics and Gynecology, University of Cologne Hospital, Cologne, Germany; Breast Center, Department of Gynecology and Obstetrics and CCC Munich, University of Munich (LMU), Munich, Germany
| | - N Harbeck
- Breast Center, Department of Obstetrics and Gynecology, University of Cologne Hospital, Cologne, Germany; Breast Center, Department of Gynecology and Obstetrics and CCC Munich, University of Munich (LMU), Munich, Germany
| | - O Hoffmann
- Department of Gynecology, Essen University Hospital, Essen, Germany
| | - S Kuemmel
- Breast Unit, Essen Mitte Clinics, Evang. Huyssens-Stiftung/Knappschaft GmbH, Essen, Germany
| | - B Martin
- Tuttlingen Clinic, Tuttlingen, Germany
| | - C Thomssen
- Department of Gynecology, Martin Luther University of Halle-Wittenberg, Halle (Saale), Germany
| | - H Graf
- Helios Clinics Meiningen, Meiningen, Germany
| | - C Wolf
- Ulm Medical Center, Ulm, Germany
| | - M P Lux
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - C M Bayer
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - C Rauh
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - K Almstedt
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany; Department of Gynecology, Mainz University Hospital, Mainz, Germany
| | - P Gass
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - F Heindl
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - T Brodkorb
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - L Willer
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - C Lindner
- Agaplesion Diakonie Clinic Hamburg, Hamburg, Germany
| | - H-C Kolberg
- Department of Gynecology and Obstetrics, Marienhospital Bottrop, Bottrop, Germany
| | - P Krabisch
- Department of Gynecology, Klinikum Chemnitz gGmbH, Chemnitz, Germany
| | - M Weigel
- Department of Gynecology, Leopoldina Hospital Schweinfurt, Schweinfurt, Germany
| | - D Steinfeld-Birg
- Gynecologic Onocologic Practice Steinfeld-Birg, Augsburg, Germany
| | - A Kohls
- Protestant County Hospital of Ludwigsfelde-Teltow, Ludwigsfelde-Teltow, Germany
| | - C Brucker
- Department of Gynecology and Obstetrics, Nuremberg General Hospital, Paracelsus Medical University, Nuremberg, Germany
| | - V Schulz
- Gynecologic Practice Abts+partner, Kiel, Germany
| | - G Fischer
- Mittweida Hospital gGmbH, Mittweida, Germany
| | - V Pelzer
- Department of Gynecology, GFO Clinics Bonn, Bonn, Germany
| | - B Rack
- Department of Gynecology, Ulm University Hospital, Ulm, Germany
| | - M W Beckmann
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - T Fehm
- Department of Gynecology, University of Tübingen, Tübingen, Germany; Department of Gynecology, Heinrich Heine University of Dusseldorf, Dusseldorf, Germany
| | - A Rody
- Department of Gynecology, Campus Lübeck, Schleswig-Holstein University Hospital, Schleswig-Holstein, Germany
| | - N Maass
- Department of Gynecology, Campus Kiel, Schleswig-Holstein University Hospital, Schleswig-Holstein, Germany
| | - A Hein
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - P A Fasching
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany.
| | - N Nabieva
- Department of Gynecology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
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Degener F, Opgen-Rhein B, Wagner R, Boehne M, Boecker D, Reineker K, Wiegand G, Racolta A, Müller G, Kiski D, Rentzsch A, Fischer M, Papakostas K, Ruf B, Hannes T, Khalil M, Kaestner M, Steinmetz M, ÖZcan S, Fischer G, Freudenthal N, Schweigmann U, Pickardt T, Huber C, Messroghli D, Schubert S. Prognostic Parameters for a Severe Disease Course in Pediatric Patients with Suspected Myocarditis: Data from the Prospective Multicenter Registry “MYKKE”. Thorac Cardiovasc Surg 2020. [DOI: 10.1055/s-0040-1705542] [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: 10/24/2022]
Affiliation(s)
| | | | | | | | | | | | - G. Wiegand
- University of Tuebingen, Tuebingen, Germany
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Hansen JH, Khodami JK, Moritz JD, Rinne K, Nagel J, Fischer G, Jussli-Melchers J, Attmann T, Scheewe J, Uebing A. The Fontan Associated Liver Disease—Is It Inevitable? Thorac Cardiovasc Surg 2020. [DOI: 10.1055/s-0040-1705564] [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: 10/24/2022]
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27
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Guo Z, Cheng Z, Wang J, Liu W, Peng H, Wang Y, Rao AVS, Li R, Ying X, Korangath P, Liberti MV, Li Y, Xie Y, Hong SY, Schiene‐Fischer C, Fischer G, Locasale JW, Sukumar S, Zhu H, Liu JO. Discovery of a Potent GLUT Inhibitor from a Library of Rapafucins by Using 3D Microarrays. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905578] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Zufeng Guo
- Department of Pharmacology and Molecular SciencesThe SJ Yan and HJ Mao Laboratory of Chemical BiologyJohns Hopkins University School of Medicine Room 516, Hunterian Building, 725 N. Wolfe Street Baltimore MD USA
| | - Zhiqiang Cheng
- Department of Pharmacology and Molecular SciencesThe SJ Yan and HJ Mao Laboratory of Chemical BiologyJohns Hopkins University School of Medicine Room 516, Hunterian Building, 725 N. Wolfe Street Baltimore MD USA
| | - Jingxin Wang
- Department of Pharmacology and Molecular SciencesThe SJ Yan and HJ Mao Laboratory of Chemical BiologyJohns Hopkins University School of Medicine Room 516, Hunterian Building, 725 N. Wolfe Street Baltimore MD USA
- Current address: Department of Medicinal ChemistryThe University of Kansas KS USA
| | - Wukun Liu
- Department of Pharmacology and Molecular SciencesThe SJ Yan and HJ Mao Laboratory of Chemical BiologyJohns Hopkins University School of Medicine Room 516, Hunterian Building, 725 N. Wolfe Street Baltimore MD USA
- Current address: Institute of Chinese MedicineNanjing University of Chinese Medicine Nanjing China
| | - Hanjing Peng
- Department of Pharmacology and Molecular SciencesThe SJ Yan and HJ Mao Laboratory of Chemical BiologyJohns Hopkins University School of Medicine Room 516, Hunterian Building, 725 N. Wolfe Street Baltimore MD USA
| | - Yuefan Wang
- Department of Pharmacology and Molecular SciencesThe SJ Yan and HJ Mao Laboratory of Chemical BiologyJohns Hopkins University School of Medicine Room 516, Hunterian Building, 725 N. Wolfe Street Baltimore MD USA
| | - A. V. Subba Rao
- Department of Pharmacology and Molecular SciencesThe SJ Yan and HJ Mao Laboratory of Chemical BiologyJohns Hopkins University School of Medicine Room 516, Hunterian Building, 725 N. Wolfe Street Baltimore MD USA
| | - Ruo‐jing Li
- Department of Pharmacology and Molecular SciencesThe SJ Yan and HJ Mao Laboratory of Chemical BiologyJohns Hopkins University School of Medicine Room 516, Hunterian Building, 725 N. Wolfe Street Baltimore MD USA
- Current address: Food and Drug Administration Silver Spring MD USA
| | - Xue Ying
- Department of Pharmacology and Molecular SciencesThe SJ Yan and HJ Mao Laboratory of Chemical BiologyJohns Hopkins University School of Medicine Room 516, Hunterian Building, 725 N. Wolfe Street Baltimore MD USA
- Current address: School of Pharmaceutical SciencesShihezi University Shihezi China
| | - Preethi Korangath
- Department of OncologyJohns Hopkins University School of Medicine USA
| | - Maria V. Liberti
- Department of Pharmacology and Cancer BiologyDuke University School of Medicine USA
| | - Yingjun Li
- Department of Pharmacology and Molecular SciencesThe SJ Yan and HJ Mao Laboratory of Chemical BiologyJohns Hopkins University School of Medicine Room 516, Hunterian Building, 725 N. Wolfe Street Baltimore MD USA
| | - Yongmei Xie
- Department of Pharmacology and Molecular SciencesThe SJ Yan and HJ Mao Laboratory of Chemical BiologyJohns Hopkins University School of Medicine Room 516, Hunterian Building, 725 N. Wolfe Street Baltimore MD USA
- Current address: Cancer CenterWest China HospitalSichuan University Chengdu China
| | - Sam Y. Hong
- Department of Pharmacology and Molecular SciencesThe SJ Yan and HJ Mao Laboratory of Chemical BiologyJohns Hopkins University School of Medicine Room 516, Hunterian Building, 725 N. Wolfe Street Baltimore MD USA
- Current address: Rapafusyn Pharmaceuticals Baltimore MD USA
| | - Cordelia Schiene‐Fischer
- Department of Enzymology, Institute for Biochemistry and BiotechnologyMartin Luther University Halle-Wittenberg Germany
| | - Gunter Fischer
- Department of Enzymology, Institute for Biochemistry and BiotechnologyMartin Luther University Halle-Wittenberg Germany
| | - Jason W. Locasale
- Department of Pharmacology and Cancer BiologyDuke University School of Medicine USA
| | - Saraswati Sukumar
- Department of OncologyJohns Hopkins University School of Medicine USA
| | - Heng Zhu
- Department of Pharmacology and Molecular SciencesJohns Hopkins University School of Medicine USA
| | - Jun O. Liu
- Department of Pharmacology and Molecular SciencesThe SJ Yan and HJ Mao Laboratory of Chemical BiologyJohns Hopkins University School of Medicine Room 516, Hunterian Building, 725 N. Wolfe Street Baltimore MD USA
- Department of OncologyJohns Hopkins University School of Medicine USA
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28
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Guo Z, Cheng Z, Wang J, Liu W, Peng H, Wang Y, Rao AVS, Li RJ, Ying X, Korangath P, Liberti MV, Li Y, Xie Y, Hong SY, Schiene-Fischer C, Fischer G, Locasale JW, Sukumar S, Zhu H, Liu JO. Discovery of a Potent GLUT Inhibitor from a Library of Rapafucins by Using 3D Microarrays. Angew Chem Int Ed Engl 2019; 58:17158-17162. [PMID: 31591797 DOI: 10.1002/anie.201905578] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [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: 05/05/2019] [Revised: 09/03/2019] [Indexed: 02/05/2023]
Abstract
Glucose transporters play an essential role in cancer cell proliferation and survival and have been pursued as promising cancer drug targets. Using microarrays of a library of new macrocycles known as rapafucins, which were inspired by the natural product rapamycin, we screened for new inhibitors of GLUT1. We identified multiple hits from the rapafucin 3D microarray and confirmed one hit as a bona fide GLUT1 ligand, which we named rapaglutin A (RgA). We demonstrate that RgA is a potent inhibitor of GLUT1 as well as GLUT3 and GLUT4, with an IC50 value of low nanomolar for GLUT1. RgA was found to inhibit glucose uptake, leading to a decrease in cellular ATP synthesis, activation of AMP-dependent kinase, inhibition of mTOR signaling, and induction of cell-cycle arrest and apoptosis in cancer cells. Moreover, RgA was capable of inhibiting tumor xenografts in vivo without obvious side effects. RgA could thus be a new chemical tool to study GLUT function and a promising lead for developing anticancer drugs.
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Affiliation(s)
- Zufeng Guo
- Department of Pharmacology and Molecular Sciences, The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins University School of Medicine, Room 516, Hunterian Building, 725 N. Wolfe Street, Baltimore, MD, USA
| | - Zhiqiang Cheng
- Department of Pharmacology and Molecular Sciences, The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins University School of Medicine, Room 516, Hunterian Building, 725 N. Wolfe Street, Baltimore, MD, USA
| | - Jingxin Wang
- Department of Pharmacology and Molecular Sciences, The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins University School of Medicine, Room 516, Hunterian Building, 725 N. Wolfe Street, Baltimore, MD, USA.,Current address: Department of Medicinal Chemistry, The University of Kansas, KS, USA
| | - Wukun Liu
- Department of Pharmacology and Molecular Sciences, The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins University School of Medicine, Room 516, Hunterian Building, 725 N. Wolfe Street, Baltimore, MD, USA.,Current address: Institute of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Hanjing Peng
- Department of Pharmacology and Molecular Sciences, The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins University School of Medicine, Room 516, Hunterian Building, 725 N. Wolfe Street, Baltimore, MD, USA
| | - Yuefan Wang
- Department of Pharmacology and Molecular Sciences, The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins University School of Medicine, Room 516, Hunterian Building, 725 N. Wolfe Street, Baltimore, MD, USA
| | - A V Subba Rao
- Department of Pharmacology and Molecular Sciences, The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins University School of Medicine, Room 516, Hunterian Building, 725 N. Wolfe Street, Baltimore, MD, USA
| | - Ruo-Jing Li
- Department of Pharmacology and Molecular Sciences, The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins University School of Medicine, Room 516, Hunterian Building, 725 N. Wolfe Street, Baltimore, MD, USA.,Current address: Food and Drug Administration, Silver Spring, MD, USA
| | - Xue Ying
- Department of Pharmacology and Molecular Sciences, The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins University School of Medicine, Room 516, Hunterian Building, 725 N. Wolfe Street, Baltimore, MD, USA.,Current address: School of Pharmaceutical Sciences, Shihezi University, Shihezi, China
| | - Preethi Korangath
- Department of Oncology, Johns Hopkins University School of Medicine, USA
| | - Maria V Liberti
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, USA
| | - Yingjun Li
- Department of Pharmacology and Molecular Sciences, The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins University School of Medicine, Room 516, Hunterian Building, 725 N. Wolfe Street, Baltimore, MD, USA
| | - Yongmei Xie
- Department of Pharmacology and Molecular Sciences, The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins University School of Medicine, Room 516, Hunterian Building, 725 N. Wolfe Street, Baltimore, MD, USA.,Current address: Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - Sam Y Hong
- Department of Pharmacology and Molecular Sciences, The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins University School of Medicine, Room 516, Hunterian Building, 725 N. Wolfe Street, Baltimore, MD, USA.,Current address: Rapafusyn Pharmaceuticals, Baltimore, MD, USA
| | - Cordelia Schiene-Fischer
- Department of Enzymology, Institute for Biochemistry and Biotechnology, Martin Luther University Halle-Wittenberg, Germany
| | - Gunter Fischer
- Department of Enzymology, Institute for Biochemistry and Biotechnology, Martin Luther University Halle-Wittenberg, Germany
| | - Jason W Locasale
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, USA
| | - Saraswati Sukumar
- Department of Oncology, Johns Hopkins University School of Medicine, USA
| | - Heng Zhu
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, USA
| | - Jun O Liu
- Department of Pharmacology and Molecular Sciences, The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins University School of Medicine, Room 516, Hunterian Building, 725 N. Wolfe Street, Baltimore, MD, USA.,Department of Oncology, Johns Hopkins University School of Medicine, USA
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29
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Ma-Lauer Y, Zheng Y, Malešević M, von Brunn B, Fischer G, von Brunn A. Influences of cyclosporin A and non-immunosuppressive derivatives on cellular cyclophilins and viral nucleocapsid protein during human coronavirus 229E replication. Antiviral Res 2019; 173:104620. [PMID: 31634494 PMCID: PMC7114175 DOI: 10.1016/j.antiviral.2019.104620] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 08/27/2019] [Accepted: 10/11/2019] [Indexed: 01/06/2023]
Abstract
The well-known immunosuppressive drug cyclosporin A inhibits replication of various viruses including coronaviruses by binding to cellular cyclophilins thus inactivating their cis-trans peptidyl-prolyl isomerase function. Viral nucleocapsid proteins are inevitable for genome encapsidation and replication. Here we demonstrate the interaction between the N protein of HCoV-229E and cyclophilin A, not cyclophilin B. Cyclophilin inhibitors abolish this interaction. Upon infection, cyclophilin A stays evenly distributed throughout the cell, whereas cyclophilin B concentrates at ER-bleb-like structures. We further show the inhibitory potential of non-immunosuppressive CsA derivatives Alisporivir, NIM811, compound 3 on HCoV-229E-GFP and -Luciferase replication in human Huh-7.5 hepatoma cells at 18 and 48 h time points post infection with EC50 s at low micromolar ranges. Thus, non-immunosuppressive CsA derivatives effectively inhibit HCoV-229E replication suggesting them as possible candidates for the treatment of HCoV infection. The interruption of interaction between CypA and N protein by CsA and its derivatives suggest a mechanism how CypA inhibitors suppress viral replication. HCoV-229E replication is inhibited by Alisporivir, NIM811 and other non-immunosuppressive Cyclosporin A derivatives. HCoV-229E N protein interacts with cyclophilin A. Cyclophilin A is required for coronavirus replication. Cyclophilin B concentrates in bleb-like structures of the ER in HCoV-infected Huh7 cells.
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Affiliation(s)
- Yue Ma-Lauer
- Max von Pettenkofer-Institute, Ludwig-Maximilians-University, Munich, Germany; German Center for Infection Research (DZIF), Partner Site Munich, 80336, Munich, Germany
| | - Yu Zheng
- Max von Pettenkofer-Institute, Ludwig-Maximilians-University, Munich, Germany; German Center for Infection Research (DZIF), Partner Site Munich, 80336, Munich, Germany
| | - Miroslav Malešević
- Institute of Biochemistry and Biotechnology, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Brigitte von Brunn
- Max von Pettenkofer-Institute, Ludwig-Maximilians-University, Munich, Germany; German Center for Infection Research (DZIF), Partner Site Munich, 80336, Munich, Germany
| | - Gunter Fischer
- Max-Planck-Institute of Biophysical Chemistry Goettingen, BO Halle, Germany
| | - Albrecht von Brunn
- Max von Pettenkofer-Institute, Ludwig-Maximilians-University, Munich, Germany; German Center for Infection Research (DZIF), Partner Site Munich, 80336, Munich, Germany.
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30
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Fischer G, Handler M, Johnston PR, Baumgarten D. Impedance and conductivity of bovine myocardium during freezing and thawing at slow rates - implications for cardiac cryo-ablation. Med Eng Phys 2019; 74:89-98. [PMID: 31570217 DOI: 10.1016/j.medengphy.2019.09.017] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 09/12/2019] [Accepted: 09/16/2019] [Indexed: 01/19/2023]
Abstract
Increasing impedance during freezing might be a valuable marker for guiding cardiac cryo-ablation. We provide model based insights on how decreasing temperature below the freezing point of tissue relates to the percentage of frozen water. Furthermore, we provide experimental data for comparing this percentage with the increase in impedance. Measurements were performed on a bovine tissue sample at frequencies between 5 and 80 kHz. Slow cooling and heating rates were applied to minimize temperature gradients in the myocardial sample and to allow accurate assessment of the freezing point. Computer simulation was applied to link impedance with temperature dependent conductivities. The osmotic virial equation was used to estimate the percentage of frozen water. Measurements identified the freezing point at -0.6 ∘C. At -5 ∘C, impedance rose by more than a factor of ten compared to that at the freezing point and the percentage of frozen water was estimated as being 89%. At -49 ∘C impedance had increased by up to three orders of magnitude and ice formation was most pronounced in the extracellular space. Progressive ice formation in tissue is reflected by a large increase in impedance, and impedance increases monotonically with the percentage of frozen water. Its analysis allows for experimental assessment of factors relevant to cell death. Solid ice contributes to the rupture of the micro-vasculature, while phase shifts reflect concentration differences between extra- and intracellular space driving osmotic water transfer across cell membranes.
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Affiliation(s)
- G Fischer
- Institute of Electrical and Biomedical Engineering, UMIT - Private University for Health Sciences, Medical Informatics and Technology, Eduard-Wallnoefer-Zentrum 1, Hall in Tyrol 6060, Austria; AFreeze GmbH, Innsbruck, Austria.
| | - M Handler
- Institute of Electrical and Biomedical Engineering, UMIT - Private University for Health Sciences, Medical Informatics and Technology, Eduard-Wallnoefer-Zentrum 1, Hall in Tyrol 6060, Austria; School of Environment and Science, Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, Queensland, Australia
| | - P R Johnston
- School of Environment and Science, Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, Queensland, Australia
| | - D Baumgarten
- Institute of Electrical and Biomedical Engineering, UMIT - Private University for Health Sciences, Medical Informatics and Technology, Eduard-Wallnoefer-Zentrum 1, Hall in Tyrol 6060, Austria; Institute of Electrical and Biomedical Engineering, Technische Universität Ilmenau, Ilmenau, Germany
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Medeiros D, Campos F, Lima M, Hubner S, Vargas G, Fischer G. Infecção latente pelo herpesvírus bovino tipo 1 em búfalos (Bubalus bubalis) no Rio Grande do Sul. ARQ BRAS MED VET ZOO 2019. [DOI: 10.1590/1678-4162-10293] [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: 11/21/2022] Open
Abstract
RESUMO Apesar dos bovinos serem considerados os hospedeiros naturais do BoHV-1, estudos sorológicos têm sugerido que búfalos podem ser suscetíveis ao BoHV-1 e a outros alfa-herpesvírus geneticamente relacionados. O objetivo deste estudo foi detectar a presença de DNA viral de BoHV-1 em 202 amostras de gânglios trigêmeos de búfalos, pela técnica de semi-nested PCR, para detecção de um segmento do gene codificante da glicoproteína D (gD) do BoHV-1. Além disso, 242 amostras de soro foram analisadas pela técnica de soroneutralização (SN) para a detecção de anticorpos neutralizantes contra BoHV-1, BoHV-5 e BuHV. Todas as amostras clínicas foram coletadas em um matadouro na cidade de Pelotas, RS, Brasil. O DNA de BoHV-1 foi detectado em 61 (30,1%) gânglios, e os resultados da SN demonstraram que 27,6% dos animais apresentaram anticorpos contra, pelo menos, um dos vírus testados. O sequenciamento genômico e a análise de 14 amplicons confirmaram a presença do DNA do BoHV-1 nos tecidos analisados. Em resumo, os resultados indicam que o BoHV-1 está distribuído em rebanhos bubalinos provenientes da região Sul do Brasil. Entretanto, são necessárias investigações adicionais, no sentido de elucidar o papel exato dos búfalos na epidemiologia das infecções pelo BoHV-1.
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Affiliation(s)
| | | | - M. Lima
- Universidade Federal de Pelotas, Brazil
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32
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Jalili F, O'Conaill C, Templeton K, Lotocki R, Fischer G, Manning L, Cormier K, Decker K. Assessing the impact of mailing self-sampling kits for human papillomavirus testing to unscreened non-responder women in Manitoba. ACTA ACUST UNITED AC 2019; 26:167-172. [PMID: 31285661 DOI: 10.3747/co.26.4575] [Citation(s) in RCA: 9] [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] [Indexed: 11/15/2022]
Abstract
Background CervixCheck, Manitoba's cervical cancer screening program, conducted a pilot study to assess whether screening participation could be improved in unscreened women by offering a mailed self-sampling kit for human papillomavirus (hpv) testing instead of a Pap test. Methods In a prospective cohort study design, a sample of unscreened women (n = 1052) who had been sent an invitation letter from CervixCheck in the past but who did not respond were randomized to either an intervention group or a control group. The intervention group received a mailed hpv self-sampling kit; the control group received no additional communication. Returned hpv self-sampling swabs were analyzed by a provincial laboratory. After 6 months, screening participation in the two study groups was compared using a logistic regression model adjusted for age and area of residence (urban or rural). Secondary outcomes included hpv positivity, specimen inadequacy, compliance with follow-up, and time to colposcopy. Results Screening participation was significantly higher in the intervention group than in the control group (n = 51, 9.6%, vs. n = 13, 2.5%; odds ratio: 4.7; 95% confidence interval: 2.56 to 8.77). Geographic area of residence (urban or rural) and age were not statistically significant. Conclusions The study demonstrated that hpv self-sampling kits can enhance screening participation in unscreened non-responder women in the setting of an organized screening program. Next steps should include additional research to determine the best implementation strategy for hpv self-sampling in Manitoba.
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Affiliation(s)
- F Jalili
- CervixCheck, CancerCare Manitoba, MB
| | | | | | - R Lotocki
- CervixCheck, CancerCare Manitoba, MB
| | - G Fischer
- Diagnostic Services, Shared Health Manitoba, MB
| | - L Manning
- Diagnostic Services, Shared Health Manitoba, MB
| | - K Cormier
- Diagnostic Services, Shared Health Manitoba, MB
| | - K Decker
- Department of Community Health Sciences, University of Manitoba, MB.,Research Institute in Oncology and Hematology, CancerCare Manitoba, Winnipeg, MB
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Peter C, Waller S, Picoli T, Osório L, Zani J, Meireles M, Faria R, Mello J, Hubner S, Lima M, Fischer G. Chemical and cytotoxic analyses of three varieties of Brazilian propolis (green propolis, jataí propolis and brown propolis) and its anti-Sporothrix brasiliensis in vitro activity. ARQ BRAS MED VET ZOO 2019. [DOI: 10.1590/1678-4162-9918] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT In this study, we described the antifungal activity of three Brazilian propolis extracts: brown, green and from jataí bees against Sporothrix brasiliensis. The extracts were obtained from ethanolic extraction and their chemical composition was determined by high-performance liquid chromatography coupled to mass spectrometry. The cellular toxicity was measured in MDBK (Madin-Darby Bovine Kidney) cells and quantified by the MTT assay (3- (4,5 dimethylthiazol-2yl -2,5-diphenyl-2H bromine tetrazolato). For antifungal activity, the minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) were determined by broth microdilution. The results showed that cell toxicity was not observed at lower concentrations (0.097 to 0.39μg/ml) for all extracts in comparison to cell control. Among the chemical compounds identified, caffeic acid, p-coumaric acid, chlorogenic acid, ferulic acid and rutin were quantified. In antifungal activity, green and jataí did not exhibit activity against the isolates (MIC and MFC greater than 0.78mg/ml). However, all isolates of S. brasiliensis were sensitive to brown propolis (MIC of 0.09 to 0.78mg/ml), including the standard strain (P<0.001). Among the Brazilian propolis studied, the brown propolis showed activity against the S. brasiliensis isolates and more studies should be undertaken in order to evaluate its promising use in the treatment of sporotrichosis.
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Affiliation(s)
| | | | - T. Picoli
- Universidade Federal de Pelotas, Brazil
| | | | - J.L. Zani
- Universidade Federal de Pelotas, Brazil
| | | | | | - J.R.B. Mello
- Universidade Federal do Rio Grande do Sul, Brazil
| | | | - M. Lima
- Universidade Federal de Pelotas, Brazil
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34
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Nabieva N, Kellner S, Fehm T, Häberle L, de Waal J, Rezai M, Baier B, Baake G, Kolberg HC, Guggenberger M, Warm M, Harbeck N, Wuerstlein R, Deuker JU, Dall P, Richter B, Wachsmann G, Brucker C, Siebers JW, Fersis N, Kuhn T, Wolf C, Vollert HW, Breitbach GP, Janni W, Landthaler R, Kohls A, Rezek D, Noesselt T, Fischer G, Henschen S, Praetz T, Heyl V, Kühn T, Krauss T, Thomssen C, Hohn A, Tesch H, Mundhenke C, Hein A, Rauh C, Bayer CM, Jacob A, Schmidt K, Belleville E, Brucker SY, Kümmel S, Beckmann MW, Wallwiener D, Hadji P, Fasching PA. Influence of patient and tumor characteristics on early therapy persistence with letrozole in postmenopausal women with early breast cancer: results of the prospective Evaluate-TM study with 3941 patients. Ann Oncol 2019; 29:186-192. [PMID: 29045642 DOI: 10.1093/annonc/mdx630] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background Patients' compliance and persistence with endocrine treatment has a significant effect on the prognosis in early breast cancer (EBC). The purpose of this analysis was to identify possible reasons for non-persistence, defined as premature cessation of therapy, on the basis of patient and tumor characteristics in individuals receiving adjuvant treatment with letrozole. Patients and methods The EvAluate-TM study is a prospective, multicenter, noninterventional study in which treatment with the aromatase inhibitor letrozole was evaluated in postmenopausal women with hormone receptor-positive EBC in the early therapy phase. Treatment persistence was evaluated at two pre-specified study visits after 6 and 12 months. As a measure of early therapy persistence the time from the start to the end of treatment (TTEOT) was analyzed. Cox regression analyses were carried out to identify patient characteristics and tumor characteristics predicting TTEOT. Results Out of the total population of 3941 patients with EBC, 540 (13.7%) events involving treatment cessation unrelated to disease progression were observed. This was due to drug-related toxicity in the majority of cases (73.5%). Persistence rates were 92.2%, 86.9%, and 86.3% after 6, 12, and 15 months, respectively. The main factors influencing premature treatment discontinuation were older age [hazard ratio (HR) 1.02/year], comorbidities (HR 1.06 per comorbidity), low body mass index, and lower tumor grade (HR 0.85 per grade unit). Conclusion These results support the view that older, multimorbid patients with low tumor grade and low body mass index are at the greatest risk for treatment discontinuation and might benefit from compliance and support programs.
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Affiliation(s)
- N Nabieva
- Department of Gynecology, Erlangen University Hospital, Friedrich-Alexander University Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - S Kellner
- Department of Gynecology, Erlangen University Hospital, Friedrich-Alexander University Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - T Fehm
- Department of Gynecology, Heinrich Heine University of Düsseldorf, Düsseldorf, Germany.,Department of Gynecology, University of Tübingen, Tübingen, Germany
| | - L Häberle
- Department of Gynecology, Erlangen University Hospital, Friedrich-Alexander University Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany.,Biostatistics Unit, Department of Gynecology, Erlangen University Hospital, Erlangen, Germany
| | - J de Waal
- Department of Gynecology, Dachau Clinic, Dachau, Germany
| | - M Rezai
- Luisen-Hospital Düsseldorf, Düsseldorf, Germany
| | - B Baier
- Department of Gynecology, Dachau Clinic, Dachau, Germany
| | - G Baake
- Oncological Medical Practice Pinneberg, Pinneberg, Germany
| | | | | | - M Warm
- Breast Center, Department of Gynecology, Cologne University Hospital, Cologne, Germany.,Breast Center, Clinics of Cologne gGmbH, Holweide, Cologne, Germany
| | - N Harbeck
- Breast Center, Department of Gynecology, Cologne University Hospital, Cologne, Germany.,Breast Center, Department of Gynecology, University of Munich (LMU), Munich, Germany
| | - R Wuerstlein
- Breast Center, Department of Gynecology, Cologne University Hospital, Cologne, Germany.,Breast Center, Department of Gynecology, University of Munich (LMU), Munich, Germany
| | - J-U Deuker
- Vinzenz-Hospital Hannover GmbH, Hannover, Germany
| | - P Dall
- Department of Gynecology, Lüneburg Clinic, Lüneburg, Germany
| | - B Richter
- Elbland Clinics, Meissen-Radebeul, Germany
| | - G Wachsmann
- County Hospital of Böblingen, Böblingen, Germany
| | - C Brucker
- Department of Gynecology, University Hospital, Paracelsus Private Medical University of Nuremberg, Nuremberg, Germany
| | - J W Siebers
- Department of Gynecology, St. Josef's Hospital, Offenburg, Germany
| | - N Fersis
- Department of Gynecology, Bayreuth Clinic GmbH, CCC ER-EMN, Bayreuth, Germany
| | - T Kuhn
- Karl-Olga-Hospital Stuttgart, Diakonie Klinikum Stuttgart, Stuttgart, Germany
| | - C Wolf
- Medical Center Ulm, Ulm, Germany
| | - H-W Vollert
- Friedrichshafen Clinic, Friedrichshafen, Germany
| | - G-P Breitbach
- Department of Gynecology, Neunkirchen Clinic, Neunkirchen, Germany
| | - W Janni
- Department of Gynecology, Ulm University Hospital, Ulm, Germany
| | - R Landthaler
- Gynecological Medical Practice of the County Hospital of Krumbach, Krumbach, Germany
| | - A Kohls
- Protestant County Hospital of Ludwigsfelde-Teltow, Ludwigsfelde-Teltow, Germany
| | - D Rezek
- Marien-Hospital Wesel, Wesel, Germany
| | - T Noesselt
- Department of Gynecology of the County Hospital of Hameln, Hameln, Germany
| | - G Fischer
- Mittweida Hospital gGmbH, Mittweida, Germany
| | - S Henschen
- HELIOS Kliniken Schwerin GmbH, Schwerin, Germany
| | - T Praetz
- Caritas-Hospital Bad Mergentheim, Bad Mergentheim, Germany
| | - V Heyl
- Asklepios Paulinen Clinic Wiesbaden, Wiesbaden, Germany
| | - T Kühn
- Department of Gynecology, Esslingen Clinics a.N., Esslingen, Germany
| | - T Krauss
- Department of Gynecology Lippe-Detmold, Lippe-Detmold, Germany
| | - C Thomssen
- Department of Gynecology, Martin Luther University of Halle-Wittenberg, Halle (Saale), Germany
| | - A Hohn
- County Hospital of Rendsburg, Rendsburg, Germany
| | - H Tesch
- Oncology Bethanien Frankfurt, Frankfurt, Germany
| | - C Mundhenke
- Department of Gynecology, University Hospital of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - A Hein
- Department of Gynecology, Erlangen University Hospital, Friedrich-Alexander University Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - C Rauh
- Department of Gynecology, Erlangen University Hospital, Friedrich-Alexander University Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - C M Bayer
- Department of Gynecology, Erlangen University Hospital, Friedrich-Alexander University Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - A Jacob
- Novartis Pharma GmbH Nuremberg, Nuremberg, Germany
| | - K Schmidt
- Novartis Pharma GmbH Nuremberg, Nuremberg, Germany
| | | | - S Y Brucker
- Department of Gynecology, University of Tübingen, Tübingen, Germany
| | - S Kümmel
- Breast Unit, Essen Mitte Clinics, Evang. Huyssens-Stiftung/Knappschaft GmbH, Essen, Germany
| | - M W Beckmann
- Department of Gynecology, Erlangen University Hospital, Friedrich-Alexander University Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - D Wallwiener
- Department of Gynecology, University of Tübingen, Tübingen, Germany
| | - P Hadji
- Department of Bone Oncology, Nordwest Hospital, Frankfurt, Germany
| | - P A Fasching
- Department of Gynecology, Erlangen University Hospital, Friedrich-Alexander University Erlangen-Nuremberg, Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
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Maletzki L, Lorenz F, Bahls M, Fischer G, Felix SB, Strohbach A, Busch R. Extracellular Cyclophilin A Inhibitor MM284 Supports Proliferation and Migration of Human Coronary Artery Endothelial Cells. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.527.7] [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: 11/11/2022]
Affiliation(s)
- Lisa Maletzki
- Department of Internal Medicine BGreifswaldGermany
- German Centre for Cardiovascular Research (DZHK)GreifswaldGermany
| | - Florian Lorenz
- Department of Internal Medicine BGreifswaldGermany
- German Centre for Cardiovascular Research (DZHK)GreifswaldGermany
| | - Martin Bahls
- Department of Internal Medicine BGreifswaldGermany
- German Centre for Cardiovascular Research (DZHK)GreifswaldGermany
| | - Gunter Fischer
- Max Planck Institute for Biophysical ChemistryGöttingenGermany
| | - Stephan B. Felix
- Department of Internal Medicine BGreifswaldGermany
- German Centre for Cardiovascular Research (DZHK)GreifswaldGermany
| | - Anne Strohbach
- Department of Internal Medicine BGreifswaldGermany
- German Centre for Cardiovascular Research (DZHK)GreifswaldGermany
| | - Raila Busch
- Department of Internal Medicine BGreifswaldGermany
- German Centre for Cardiovascular Research (DZHK)GreifswaldGermany
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Nenadovic M, Fiebig N, Fischer G, Wessel J, Kissinger D. A Low-Power Injection-Locked VCO for an Implantable MICS Band Transmitter with Wireless Frequency Reference and Tune-while-Lock Channel Calibration. Annu Int Conf IEEE Eng Med Biol Soc 2018; 2018:2993-2996. [PMID: 30441027 DOI: 10.1109/embc.2018.8512939] [Citation(s) in RCA: 1] [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: 11/08/2022]
Abstract
This paper presents the design of an 800 MHz VCO for both free-running and injection locked operation in a novel low power transmitter with wireless frequency reference, operating in the MICS band (402-405 MHz). The transmitter employs simultaneous tuning and locking, to set the desired channel with a minimal injected power. The VCO is designed and fabricated in a 0.13 $\mu \mathrm{m}$ SiGe BiCMOS process and has a core area of 0.5 $\mathrm{m}\mathrm{m}^{2}$. The measurement of the free-running VCO shows -107 dBc/Hz phase noise at 300 kHz frequency offset. If locked to an external frequency reference the VCO shows 118 dBc/Hz phase noise at 300 KHz offset, while consuming 3 mA from a 1.2 V supply (3.6 mW). When the VCO is tuned during the locking, 20 dBm of reference power is required to enable operation in the whole MICS band. The measured phase noise of the free-running VCO ensures reliable calibration of the proposed transmitter and the locked VCO satisfies all requirements of an implantable device using MICS band data transmission. Therefore, this VCO presents a key building block of an injection locked, frequency agile, implantable transmitter for the MICS band.
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Hollmann A, Jirovec D, Kucharski M, Kissinger D, Fischer G, Schreiber LR. 30 GHz-voltage controlled oscillator operating at 4 K. Rev Sci Instrum 2018; 89:114701. [PMID: 30501331 DOI: 10.1063/1.5038258] [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: 05/02/2018] [Accepted: 10/28/2018] [Indexed: 06/09/2023]
Abstract
Solid-state qubit manipulation and read-out fidelities are reaching fault-tolerance, but quantum error correction requires millions of physical qubits and therefore a scalable quantum computer architecture. To solve signal-line bandwidth and fan-out problems, microwave sources required for qubit manipulation might be embedded close to the qubit chip, typically operating at temperatures below 4 K. Here, we perform the first low temperature measurements of a 130 nm BiCMOS based SiGe voltage controlled oscillator at cryogenic temperature. We determined the frequency and output power dependence on temperature and magnetic field up to 5 T and measured the temperature influence on its noise performance. The device maintains its full functionality from 300 K to 4 K. The carrier frequency at 4 K increases by 3% with respect to the carrier frequency at 300 K, and the output power at 4 K increases by 10 dB relative to the output power at 300 K. The frequency tuning range of approximately 20% remains unchanged between 300 K and 4 K. In an in-plane magnetic field of 5 T, the carrier frequency shifts by only 0.02% compared to the frequency at zero magnetic field.
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Affiliation(s)
- Arne Hollmann
- JARA-FIT Institute for Quantum Information, Forschungszentrum Jülich GmbH and RWTH Aachen University, D 52074 Aachen, Germany
| | - Daniel Jirovec
- Institute of Science and Technology Austria, Am Campus 1, 3400 Klosterneuburg, Austria
| | | | | | - Gunter Fischer
- IHP, Im Technologiepark 25, 15236 Frankfurt (Oder), Germany
| | - Lars R Schreiber
- JARA-FIT Institute for Quantum Information, Forschungszentrum Jülich GmbH and RWTH Aachen University, D 52074 Aachen, Germany
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Maniuc O, Fischer G, Petri N, Sakas G, Kolev V, Nordbeck P, Herrmann S, Frantz S, Voelker W. P3422High precision vessel access during transfemoral aortic valve implantation - a pilot study of puncture guidance using a new navigation technique. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3422] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- O Maniuc
- University Hospital of Wurzburg, Department of Internal Medicine I, Wurzburg, Germany
| | - G Fischer
- University Hospital of Wurzburg, Department of Internal Medicine I, Wurzburg, Germany
| | - N Petri
- University Hospital of Wurzburg, Department of Internal Medicine I, Wurzburg, Germany
| | | | | | - P Nordbeck
- University Hospital of Wurzburg, Department of Internal Medicine I, Wurzburg, Germany
| | - S Herrmann
- University Hospital of Wurzburg, Department of Internal Medicine I, Wurzburg, Germany
| | - S Frantz
- University Hospital of Wurzburg, Department of Internal Medicine I, Wurzburg, Germany
| | - W Voelker
- University Hospital of Wurzburg, Department of Internal Medicine I, Wurzburg, Germany
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Gardner G, Weiss H, Klotz A, Ogden S, Boccamazzo D, Hagerty-Paglia J, Abu-Rustum N, Sepkowitz K, Fischer G, Drebin J. Indicated presurgical testing is a priority to achieve high-quality, cost-effective oncologic health care delivery. Gynecol Oncol 2018. [DOI: 10.1016/j.ygyno.2018.04.039] [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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40
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Nabieva N, Fehm T, Häberle L, de Waal J, Rezai M, Baier B, Baake G, Kolberg HC, Guggenberger M, Warm M, Harbeck N, Wuerstlein R, Deuker JU, Dall P, Richter B, Wachsmann G, Brucker C, Siebers JW, Popovic M, Kuhn T, Wolf C, Vollert HW, Breitbach GP, Janni W, Landthaler R, Kohls A, Rezek D, Noesselt T, Fischer G, Henschen S, Praetz T, Heyl V, Kühn T, Krauss T, Thomssen C, Hohn A, Tesch H, Mundhenke C, Hein A, Hack CC, Schmidt K, Belleville E, Brucker SY, Kümmel S, Beckmann MW, Wallwiener D, Hadji P, Fasching PA. Influence of side-effects on early therapy persistence with letrozole in post-menopausal patients with early breast cancer: Results of the prospective EvAluate-TM study. Eur J Cancer 2018; 96:82-90. [PMID: 29679775 DOI: 10.1016/j.ejca.2018.03.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [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: 12/07/2017] [Revised: 03/15/2018] [Accepted: 03/19/2018] [Indexed: 11/25/2022]
Abstract
BACKGROUND Endocrine treatment (ET) with an aromatase inhibitor (AI) is the treatment of choice in post-menopausal patients with hormone receptor-positive early breast cancer (EBC). However, adverse events (AEs) often lead to treatment discontinuation. This analysis aimed to identify side-effects that lead to patients failing to persist with letrozole treatment. PATIENTS AND METHODS Post-menopausal hormone receptor-positive EBC patients starting ET with letrozole were enroled in EvAluate-TM, a non-interventional study. Information regarding treatment compliance and persistence was gathered in months 6 and 12. Persistence was defined as the time from 30 d after the start to the end of treatment. The influence on persistence of musculoskeletal syndrome, menopausal disorder, sleep disorder and other AEs within the first 30 d was analysed using Cox regression analyses. RESULTS Among 3887 patients analysed, the persistence rate after 12 months was >85%. In all, 568 patients (14.6%) discontinued the treatment, 358 of whom (63.0%) did so only because of side-effects. The main AEs influencing persistence were musculoskeletal symptoms (hazard ratio [HR] 2.55; 95% confidence interval [CI], 1.90-3.42), sleep disorders (HR 1.95; 95% CI, 1.41-2.70) and other AEs (HR 2.03; 95% CI, 1.51-2.73). Menopausal disorder was not associated with non-persistence (HR 1.17; 95% CI, 0.74-1.84). CONCLUSIONS These results suggest that side-effects of AIs such as musculoskeletal syndrome and sleep disorder lead to ET discontinuation within the first treatment year in significant numbers of EBC patients. Compliance programmes adapted for subgroups that are at risk for early non-persistence might help to ensure the recommended therapy duration. CLINICAL TRIALS NUMBER CFEM345DDE19.
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Affiliation(s)
- N Nabieva
- Department of Obstetrics and Gynecology, Erlangen University Hospital, Comprehensive Cancer Center Erlangen-European Metropolitan Area Nuremberg, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - T Fehm
- Department of Gynecology, Heinrich Heine University of Düsseldorf, Düsseldorf, Germany; Department of Gynecology, University of Tübingen, Tübingen, Germany
| | - L Häberle
- Department of Obstetrics and Gynecology, Erlangen University Hospital, Comprehensive Cancer Center Erlangen-European Metropolitan Area Nuremberg, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany; Biostatistics Unit, Department of Gynecology, Erlangen University Hospital, Erlangen, Germany
| | - J de Waal
- Department of Gynecology, Dachau Clinic, Dachau, Germany
| | - M Rezai
- Luisen-Hospital Düsseldorf, Düsseldorf, Germany
| | - B Baier
- Department of Gynecology, Dachau Clinic, Dachau, Germany
| | - G Baake
- Oncological Medical Practice Pinneberg, Pinneberg, Germany
| | | | | | - M Warm
- Breast Center, Department of Gynecology, Cologne University Hospital, Cologne, Germany; Breast Center, Clinics of Cologne GmbH, Holweide, Cologne, Germany
| | - N Harbeck
- Breast Center, Department of Gynecology, Cologne University Hospital, Cologne, Germany; University Hospital Munich (LMU), Dept. of Gynecology and Obstetrics, Breast Center and CCC Munich, Munich, Germany
| | - R Wuerstlein
- Breast Center, Department of Gynecology, Cologne University Hospital, Cologne, Germany; University Hospital Munich (LMU), Dept. of Gynecology and Obstetrics, Breast Center and CCC Munich, Munich, Germany
| | - J-U Deuker
- Vinzenz-Hospital Hannover GmbH, Hannover, Germany
| | - P Dall
- Department of Gynecology, Lüneburg Clinic, Lüneburg, Germany
| | - B Richter
- Elbland Clinics, Meissen-Radebeul, Germany
| | - G Wachsmann
- County Hospital of Böblingen, Böblingen, Germany
| | - C Brucker
- Department of Gynecology, University Hospital, Paracelsus Private Medical University of Nuremberg, Nuremberg, Germany
| | - J W Siebers
- Department of Gynecology, St. Josef's Hospital, Offenburg, Germany
| | - M Popovic
- Department of Gynecology, Bayreuth Clinic GmbH, CCC ER-EMN, Bayreuth, Germany
| | - T Kuhn
- Karl-Olga-Hospital Stuttgart, Diakonie Klinikum Stuttgart, Stuttgart, Germany
| | - C Wolf
- Medical Center Ulm, Ulm, Germany
| | - H-W Vollert
- Friedrichshafen Clinic, Friedrichshafen, Germany
| | - G-P Breitbach
- Department of Gynecology, Neunkirchen Clinic, Neunkirchen, Germany
| | - W Janni
- Department of Gynecology, Ulm University Hospital, Ulm, Germany
| | - R Landthaler
- Gynecological Medical Practice of the County Hospital of Krumbach, Krumbach, Germany
| | - A Kohls
- Evangelic County Hospital Ludwigsfelde-Teltow, Ludwigsfelde-Teltow, Germany
| | - D Rezek
- Marien-Hospital Wesel, Wesel, Germany
| | - T Noesselt
- Department of Gynecology of the County Hospital of Hameln, Hameln, Germany
| | - G Fischer
- Mittweida Hospital gGmbH, Mittweida, Germany
| | - S Henschen
- Johanniter Hospital Genthin Stendal gGmbH, Hansestadt Stendal, Germany
| | - T Praetz
- Caritas-Hospital Bad Mergentheim, Bad Mergentheim, Germany
| | - V Heyl
- Asklepios Paulinen Clinic Wiesbaden, Wiesbaden, Germany
| | - T Kühn
- Department of Gynecology, Esslingen Clinics a.N., Esslingen, Germany
| | - T Krauss
- Department of Gynecology Passau, Passau, Germany
| | - C Thomssen
- Department of Gynecology, Martin Luther University of Halle-Wittenberg, Halle (Saale), Germany
| | - A Hohn
- County Hospital Kiel GmbH, Kiel, Germany
| | - H Tesch
- Oncology Bethanien Frankfurt, Frankfurt, Germany
| | - C Mundhenke
- Department of Gynecology, University Hospital of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - A Hein
- Department of Obstetrics and Gynecology, Erlangen University Hospital, Comprehensive Cancer Center Erlangen-European Metropolitan Area Nuremberg, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - C C Hack
- Department of Obstetrics and Gynecology, Erlangen University Hospital, Comprehensive Cancer Center Erlangen-European Metropolitan Area Nuremberg, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - K Schmidt
- Novartis Pharma GmbH Nuremberg, Nuremberg, Germany
| | | | - S Y Brucker
- Department of Gynecology, University of Tübingen, Tübingen, Germany
| | - S Kümmel
- Breast Unit, Essen Mitte Clinics, Evang. Huyssens-Stiftung/Knappschaft GmbH, Essen, Germany
| | - M W Beckmann
- Department of Obstetrics and Gynecology, Erlangen University Hospital, Comprehensive Cancer Center Erlangen-European Metropolitan Area Nuremberg, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - D Wallwiener
- Department of Gynecology, University of Tübingen, Tübingen, Germany
| | - P Hadji
- Department of Bone Oncology, Nordwest Hospital, Frankfurt, Germany
| | - P A Fasching
- Department of Obstetrics and Gynecology, Erlangen University Hospital, Comprehensive Cancer Center Erlangen-European Metropolitan Area Nuremberg, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany.
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Erdmann F, Prell E, Jahreis G, Fischer G, Malešević M. Screening for Selective Protein Inhibitors by Using the IANUS Peptide Array. Chembiochem 2018; 19:789-792. [PMID: 29411932 DOI: 10.1002/cbic.201700652] [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: 12/12/2017] [Indexed: 11/10/2022]
Abstract
Finding new road blacks: A peptidic inhibitor of calcineurin (CaN)-mediated nuclear factor of activated T cells (NFAT) dephosphorylation, which is developed through a template-assisted IANUS (Induced orgANisation of strUcture by matrix-assisted togethernesS) peptide array, is cell permeable and able to block the translocation of green fluorescent protein-NFAT fusion protein (GFP-NFAT) into the nucleus after stimulation.
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Affiliation(s)
- Frank Erdmann
- Max Planck Research Unit for Enzymology of Protein Folding, Weinbergweg 22, 06120, Halle/Saale, Germany.,Martin-Luther-University Halle-Wittenberg, Institute of Pharmacy, Department of Pharmacology, Wolfgang-Langenbeck-Strasse 4, 06120, Halle, Germany
| | - Erik Prell
- Max Planck Research Unit for Enzymology of Protein Folding, Weinbergweg 22, 06120, Halle/Saale, Germany.,Present address: University Hospital Halle, Department for Radiation Medicine, Nuclear Medicine, Radiopharmacy, Ernst-Grube-Strasse 40, 06120, Halle, Germany
| | - Günther Jahreis
- Max Planck Research Unit for Enzymology of Protein Folding, Weinbergweg 22, 06120, Halle/Saale, Germany
| | - Gunter Fischer
- Max Planck Research Unit for Enzymology of Protein Folding, Weinbergweg 22, 06120, Halle/Saale, Germany.,Present address: Max-Planck Institute for Biophysical Chemistry, Göttingen, Branch Office Halle, Weinbergweg 22, 06120 Halle, Germany
| | - Miroslav Malešević
- Max Planck Research Unit for Enzymology of Protein Folding, Weinbergweg 22, 06120, Halle/Saale, Germany.,Present address: Martin-Luther-University Halle-Wittenberg, Institute of Biochemistry and Biotechnology, Enzymology Department, Weinbergweg 22, 06120, Halle, Germany
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Roos T, Avila L, Sturbelle R, Leite F, Fischer G, Leite F. Saccharomyces boulardii modulates and improves the immune response to Bovine Herpesvirus type 5 Vaccine. ARQ BRAS MED VET ZOO 2018. [DOI: 10.1590/1678-4162-9167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
ABSTRACT There have been significant efforts towards the development of more efficient vaccines for animal health. A strategy that may be used to improve vaccine efficacy is the use of probiotics to enhance the immune response of the host, leading to increased immunogenicity of antigen preparations. Bovine herpesvirus 5 (BoHV-5) is an example of an important animal pathogen for which vaccines have provided only limited protection. In this study, we examined the use of the probiotic Saccharomyces boulardii (Sb) as a potential adjuvant to improve vaccine efficiency. We found that the supplemented animals exhibited an enhanced systemic IgG antibody response toward a Th1 response in favor of IgG2a and increased mRNA expression levels of the cytokines IFN-y, IL-12, IL-17 and IL-10 in the spleen. These results suggest that Sb supplementation may provide a promising means for improving the efficiency of vaccines, particularly those that rely on a cell-mediated immune response.
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Affiliation(s)
- T.B. Roos
- Universidade Federal do Pará, Brazil
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Haux R, Kulikowski C, Bohne A, Brandner R, Brigl B, Fischer G, Garde S, Knaup P, Ruderich F, Schubert R, Singer R, Wolff AC, Ammenwerth E. Medical Informatics and the Quality of Health: New Approaches to Support Patient Care. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1634331] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Summary
Objectives: The Yearbook of Medical Informatics is published annually by the International Medical Informatics Association (IMIA) and contains a selection of excellent papers on medical informatics research which have been recently published (www.yearbook.uni-hd.de). The 2003 Yearbook of Medical Informatics took as its theme the role of medical informatics for the quality of health care. In this paper, we will discuss challenges for health care, and the lessons learned from editing IMIA Yearbook 2003.
Results and Conclusions: Modern information processing methodology and information and communication technology have strongly influenced our societies and health care. As a consequence of this, medical informatics as a discipline has taken a leading role in the further development of health care. This involves developing information systems that enhance opportunities for global access to health services and medical knowledge. Informatics methodology and technology will facilitate high quality of care in aging societies, and will decrease the possibilities of health care errors. It will also enable the dissemination of the latest medical and health information on the web to consumers and health care providers alike. The selected papers of the IMIA Yearbook 2003 present clear examples and future challenges, and they highlight how various sub-disciplines of medical informatics can contribute to this.
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Pfeifer B, Seger M, Hintermüller C, Hanser F, Modre R, Tilg B, Trieb T, Kremser C, Roithinger FX, Hintringer F, Fischer G. Computationally Efficient Noninvasive Cardiac Activation Time Imaging. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1634024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Summary
Objective:
The computer model-based computation of the cardiac activation sequence in humans has been recently subject of successful clinical validation. This method is of potential interest for guiding ablation therapy of arrhythmogenic substrates. However, computation times of almost an hour are unattractive in a clinical setting. Thus, the objective is the development of a method which performs the computation in a few minutes run time.
Methods:
The computationally most expensive part is the product of the lead field matrix with a matrix containing the source pattern on the cardiac surface. The particular biophysical properties of both matrices are used for speeding up this operation by more than an order of magnitude. A conjugate gradient optimizer was developed using C++ for computing the activation map.
Results:
The software was tested on synthetic and clinical data. The increase in speed with respect to the previously used Fortran 77 implementation was a factor of 30 at a comparable quality of the results. As an additional finding the coupled regularization strategy, originally introduced for saving computation time, also reduced the sensitivity of the method to the choice of the regularization parameter.
Conclusions:
As it was shown for data from a WPW-patient the developed software can deliver diagnostically valuable information at a much shorter span of time than current clinical routine methods. Its main application could be the localization of focal arrhythmogenic substrates.
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Hanser F, Pfeifer B, Seger M, Hintermüller C, Modre R, Tilg B, Trieb T, Berger T, Roithinger FX, Hintringer F, Fischer G. A Signal Processing Pipeline for Noninvasive Imaging of Ventricular Preexcitation. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1634001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Summary
Objectives:
Noninvasive imaging of the cardiac activation sequence in humans could guide interventional curative treatment of cardiac arrhythmias by catheter ablation. Highly automated signal processing tools are desirable for clinical acceptance. The developed signal processing pipeline reduces user interactions to a minimum, which eases the operation by the staff in the catheter laboratory and increases the reproducibility of the results.
Methods:
A previously described R-peak detector was modified for automatic detection of all possible targets (beats) using the information of all leads in the ECG map. A direct method was applied for signal classification. The algorithm was tuned for distinguishing beats with an adenosine induced AV-nodal block from baseline morphology in Wolff-Parkinson-White (WPW) patients. Furthermore, an automatic identification of the QRS-interval borders was implemented.
Results:
The software was tested with data from eight patients having overt ventricular preexcitation. The R-peak detector captured all QRS-complexes with no false positive detection. The automatic classification was verified by demonstrating adenosine-induced prolongation of ventricular activation with statistical significance (p <0.001) in all patients. This also demonstrates the performance of the automatic detection of QRS-interval borders. Furthermore, all ectopic or paced beats were automatically separated from sinus rhythm. Computed activation maps are shown for one patient localizing the accessory pathway with an accuracy of 1 cm.
Conclusions:
The implemented signal processing pipeline is a powerful tool for selecting target beats for noninvasive activation imaging in WPW patients. It robustly identifies and classifies beats. The small beat to beat variations in the automatic QRS-interval detection indicate accurate identification of the time window of interest.
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Fischer G, Hanser F, Seger M, Hintermüller C, Modre-Osprian R, Trieb T, Tilg B, Pfeifer B. Atrial and Ventricular Myocardium Extraction Using Model-based Techniques. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1634032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Summary
Objectives:
This paper presents an efficient approach for extracting myocardial structures from given atrial and ventricular blood masses to enable non-invasive estimation of electrical excitation in human atria and ventricles.
Methods:
Based on given segmented atrial and ventricular blood masses, the approach constructs the myocardial structure directly, in the case that the myocardium can be detected in the volume data, or by using mean model information, in the case that the myocardium cannot be seen in the volume data due to image modalities or artefacts. The approach employs mathematical and gray-value morphology operations. Regulated by the spatial visibility of the myocardial structure in the medical image data especially the atrial myocardium needs to be estimated repeatedly using the a-priori knowledge given by the anatomy.
Results:
The approach was tested using eight patient data sets. The reconstruction process yielded satisfying results with respect to an efficient generation of a volume conductor model which is essential when trying to implement the estimation of electrical excitation in clinical application.
Conclusion:
The approach yields ventricular and atrial models that qualify for cardiac source imaging in a clinical setting.
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Ammenwerth E, Brandner R, Brigl B, Fischer G, Garde S, Lang E, Pilgram R, Ruderich F, Singer R, Wolff AC, Haux R, Kulikowski C, Knaup P. Towards Clinical Bioinformatics: Advancing Genomic Medicine with Informatics Methods and Tools. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1633872] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Summary
Objectives:
To summarize the challenges facing clinical applications in the light of growing research results in genomic medicine and bioinformatics.
Methods:
Analysis of the contents of the Yearbook of Medical Informatics 2004 of the International Medical Informatics Association (IMIA).
Results:
The Yearbook of Medical Informatics 2004 includes 32 articles selected from 22 peer-reviewed scientific journals. A special section on clinical bio-informatics highlights recent developments in this field. Several guest editors review the promises and limitations of available methods and resources from biomedical informatics that are relevant to clinical medicine. Integrated data and knowledge resources are generally regarded to be central and key issues for clinical bioinformatics. Further review papers deal with public health implications of bioinformatics, knowledge management and trends in health care education. The Yearbook includes for the first time a section on the history of medical informatics, where the significant impact of the Reisensburg protocol 1973 on international health and medical informatics education is examined.
Conclusions:
Close collaboration between bio-informatics and medical informatics researchers can contribute to new insights in genomic medicine and contribute towards the more efficient and effective use of genomic data to advance clinical care.
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Seger M, Hintermüller C, Fischer G, Mühlthaler H, Modre-Osprian R, Tilg B, Pfeifer B. AAM-based Segmentation for Imaging Cardiac Electrophysiology. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1627829] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Summary
Objectives: Activation time (AT) imaging from electrocardiographic (ECG) mapping data has been developing for several years. By coupling 4-dimensional volume data (3D + time) the electrical sequence can be computed non-invasively. In this paper an approach for extracting the ventricular and atrial blood masses for structurally normal hearts by using cine-gated shortaxis data obtained via magnetic resonance imaging (MRI) is introduced.
Methods: The blood masses are extracted by employing Active Appearance Models (AAMs). The ventricular blood masses are segmented, applying the AAMs after providing apex cordis and base of the heart in the volume data, whereas the more complex geometry of the atria requires a more specific attempt. On account of this the atrium was divided into three divisions of appearance, where the images of the volume data in the related divisions have a maximum affinity. The first division reaches from the base of the heart to initial visibility of the upper and left lower pulmonary vein. The second division up from there to the last occurrence and the third division from there to the end of the visibility of the right upper and lower pulmonary vein. After extracting the cardiac blood masses the result gets triangulated and remeshed for activation time imaging.
Results: With this method the cardiac models of eight patients were extracted and the AT imaging approach was applied to single-beat ECG data of atrial and ventricular depolarization.
Conclusion: The advantage of the proposed AAM approach is that only a few initial parameters have to be set. Therefore, the approach can be integrated into a processing pipeline that works semi-automatically. The extracted models can be used for further investigations.
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Fischer G, Neurauter A, Wieser L, Strohmenger HU, Nowak CN. Prediction of Countershock Success. Methods Inf Med 2018; 48:486-92. [DOI: 10.3414/me0580] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2008] [Accepted: 02/23/2009] [Indexed: 11/09/2022]
Abstract
Summary
Objectives: Spectral analysis of the ventricular fibrillation (VF) ECG has been used for predicting countershock success, where the Fast Fourier Transformation (FFT) is the standard spectral estimator. Autoregressive (AR) spectral estimation should compute the spectrum with less computation time. This study compares the predictive power and computational performance of features obtained by the FFT and AR methods.
Methods: In an animal model of VF cardiac arrest, 41 shocks were delivered in 25 swine. For feature parameter analysis, 2.5 s signal intervals directly before the shock and directly before the hands-off interval were used, respectively. Invasive recordings of the arterial pressure were used for assessing the outcome of each shock. For a proof of concept, a micro-controller program was implemented.
Results: Calculating the area under the receiver operating characteristic (ROC) curve (AUC), the results of the AR-based features called spectral pole power (SPP) and spectral pole power with dominant frequency (DF) weighing (SPPDF) yield better outcome prediction results (85 %; 89 %) than common parameters based on FFT calculation method (centroid frequency (CF), amplitude spectrum area (AMSA)) (72%; 78%) during hands-off interval. Moreover, the predictive power of the feature parameters during ongoing CPR was not invalidated by closed-chest compressions. The calculation time of the AR-based parameters was nearly 2.5 times faster than the FFT-based features.
Conclusion: Summing up, AR spectral estimators are an attractive option compared to FFT due to the reduced computational speed and the better outcome prediction. This might be of benefit when implementing AR prediction features on the microprocessor of a semi-automatic defibrillator.
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Stühlinger MC, Nowak CN, Spuller K, Etsadashvili K, Stühlinger X, Berger T, Dichtl W, Gothe RM, Fischer G, Hintringer F, Rantner LJ. Localizing the Accessory Pathway in Ventricular Preexcitation Patients Using a Score Based Algorithm. Methods Inf Med 2018; 51:3-12. [DOI: 10.3414/me11-01-0046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2011] [Accepted: 08/23/2011] [Indexed: 11/09/2022]
Abstract
SummaryObjectives: Clinical data was analyzed to find an efficient way to localize the accessory pathway in patients with ventricular preexcitation.Methods: The delta wave morphologies and ablation sites of 186 patients who underwent catheter ablation were analyzed and an algorithm (“locAP”) to localize the accessory pathway was developed from the 84 data sets with a PQ interval ≤ 0.12 s and a QRS width ≥ 0.12 s. Fifty additional patients were included for a prospective validation. The locAP algorithm ranks 13 locations according to the likelihood that the accessory pathway is localized there. The algorithm is based on the locAP score which uses the standardized residuals of the available data sets.Results: The locAP algorithm’s accuracy is 0.54 for 13 locations, with a sensitivity of 0.84, a specificity of 0.97, and a positive likelihood ratio of 24.94. If the two most likely locations are regarded, the accuracy rises to 0.79, for the three most likely locations combined the accuracy is 0.82. This new algorithm performs better than Milstein’s, Fitzpatrick’s, and Arruda’s algorithm both in the original study population as well as in a prospective study.Conclusions: The locAP algorithm is a valid and valuable tool for clinical practice in a cardiac electrophysiology laboratory. It could be shown that use of the locAP algorithm is favorable over the localizing algorithms that are in clinical use today.
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