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https://www.readbyqxmd.com/read/29179133/improved-heart-repair-upon-myocardial-infarction-combination-of-magnetic-nanoparticles-and-tailored-magnets-strongly-increases-engraftment-of-myocytes
#1
Annika Ottersbach, Olga Mykhaylyk, Alexandra Heidsieck, Dietmar Eberbeck, Sarah Rieck, Katrin Zimmermann, Martin Breitbach, Britta Engelbrecht, Tobias Brügmann, Michael Hesse, Armin Welz, Philipp Sasse, Daniela Wenzel, Christian Plank, Bernhard Gleich, Michael Hölzel, Wilhelm Bloch, Alexander Pfeifer, Bernd K Fleischmann, Wilhelm Roell
Cell replacement in the heart is considered a promising strategy for the treatment of post-infarct heart failure. Direct intramyocardial injection of cells proved to be the most effective application route, however, engraftment rates are very low (<5%) strongly hampering its efficacy. Herein we combine magnetic nanoparticle (MNP) loading of EGFP labeled embryonic cardiomyocytes (eCM) and embryonic stem cell-derived cardiomyocytes (ES-CM) with application of custom designed magnets to enhance their short and long-term engraftment...
November 15, 2017: Biomaterials
https://www.readbyqxmd.com/read/29109262/myoanatomy-of-the-velvet-worm-leg-revealed-by-laboratory-based-nanofocus-x-ray-source-tomography
#2
Mark Müller, Ivo de Sena Oliveira, Sebastian Allner, Simone Ferstl, Pidassa Bidola, Korbinian Mechlem, Andreas Fehringer, Lorenz Hehn, Martin Dierolf, Klaus Achterhold, Bernhard Gleich, Jörg U Hammel, Henry Jahn, Georg Mayer, Franz Pfeiffer
X-ray computed tomography (CT) is a powerful noninvasive technique for investigating the inner structure of objects and organisms. However, the resolution of laboratory CT systems is typically limited to the micrometer range. In this paper, we present a table-top nanoCT system in conjunction with standard processing tools that is able to routinely reach resolutions down to 100 nm without using X-ray optics. We demonstrate its potential for biological investigations by imaging a walking appendage of Euperipatoides rowelli, a representative of Onychophora-an invertebrate group pivotal for understanding animal evolution...
November 6, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29101369/trabecular-bone-anisotropy-imaging-with-a-compact-laser-undulator-synchrotron-x-ray-source
#3
Christoph Jud, Eva Braig, Martin Dierolf, Elena Eggl, Benedikt Günther, Klaus Achterhold, Bernhard Gleich, Ernst Rummeny, Peter Noël, Franz Pfeiffer, Daniela Muenzel
Conventional x-ray radiography is a well-established standard in diagnostic imaging of human bones. It reveals typical bony anatomy with a strong surrounding cortical bone and trabecular structure of the inner part. However, due to limited spatial resolution, x-ray radiography cannot provide information on the microstructure of the trabecular bone. Thus, microfractures without dislocation are often missed in initial radiographs, resulting in a lack or delay of adequate therapy. Here we show that x-ray vector radiography (XVR) can overcome this limitation and allows for a deeper insight into the microstructure with a radiation exposure comparable to standard radiography...
November 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29049300/increased-cell-survival-and-cytogenetic-integrity-by-spatial-dose-redistribution-at-a-compact-synchrotron-x-ray-source
#4
Karin Burger, Katarina Ilicic, Martin Dierolf, Benedikt Günther, Dietrich W M Walsh, Ernst Schmid, Elena Eggl, Klaus Achterhold, Bernhard Gleich, Stephanie E Combs, Michael Molls, Thomas E Schmid, Franz Pfeiffer, Jan J Wilkens
X-ray microbeam radiotherapy can potentially widen the therapeutic window due to a geometrical redistribution of the dose. However, high requirements on photon flux, beam collimation, and system stability restrict its application mainly to large-scale, cost-intensive synchrotron facilities. With a unique laser-based Compact Light Source using inverse Compton scattering, we investigated the translation of this promising radiotherapy technique to a machine of future clinical relevance. We performed in vitro colony-forming assays and chromosome aberration tests in normal tissue cells after microbeam irradiation compared to homogeneous irradiation at the same mean dose using 25 keV X-rays...
2017: PloS One
https://www.readbyqxmd.com/read/29047321/perioperative-and-anesthetic-considerations-in-pulmonary-atresia-with-intact-ventricular-septum
#5
Stephen Gleich, Gregory J Latham, Denise Joffe, Faith J Ross
Pulmonary atresia with intact ventricular septum (PA/IVS) is a rare right-heart obstructive lesion with a wide anatomic and physiologic spectrum of disease, ranging from simple membranous pulmonary valve atresia with a fully developed right ventricle (RV) to a severely hypoplastic RV and ventriculocoronary (RV-coronary) fistulas. Affected neonates are dependent on prostaglandin for adequate pulmonary blood flow. Depending on the severity of disease, treatment options range from transcatheter pulmonary valve perforation and ultimate biventricular repair to staged single-ventricle palliation...
October 1, 2017: Seminars in Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29037509/structure-determination-of-disease-associated-peak-aaa-from-l-tryptophan-implicated-in-the-eosinophilia-myalgia-syndrome
#6
Klaus Klarskov, Hugo Gagnon, Pierre-Luc Boudreault, Chad Normandin, Baptiste Plancq, Eric Marsault, Gerald J Gleich, Stephen Naylor
The eosinophilia-myalgia syndrome (EMS) outbreak of 1989 that occurred in the USA and elsewhere was caused by the ingestion of l-Tryptophan (L-Trp) solely manufactured by the Japanese company Showa Denko K.K. (SD). Six compounds present in the SD L-Trp were reported to be case-associated contaminants. However, "one" of these compounds, Peak AAA has remained structurally uncharacterized, despite the fact that it was described as "the only statistically significant (p=0.0014) contaminant". Here, we employ on-line microcapillary-high performance liquid chromatography-electrospray ionization mass spectrometry (LC-MS), and tandem mass spectrometry (MS/MS) to determine that Peak AAA is in fact two structurally related isomers...
October 14, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28902608/technique-tricks-for-the-gleich-koutsogiannis-surgical-procedure-for-correction-of-the-adult-acquired-flatfoot
#7
Andrea Salvi, Andrea Volghi
Gleich-Koutsogiannis is a widely known extra-articular closing calcaneal osteotomic technique for correction of the adult flatfoot. Absolute care must be observed during each procedural step to avoid undesirable drawbacks, such as nerves and tendons lesions, incorrect fixation, and hardware painful prominence. It is the purpose of this report to introduce tricks to critical steps in order to improve the technique and minimize potential surgical complications.
May 2017: Bulletin of the Hospital for Joint Diseases
https://www.readbyqxmd.com/read/28852777/-clostridium-difficile-associated-deaths-from-2013-2016-in-munich-and-nuremberg-reporting-behavior-and-patient-characteristics
#8
REVIEW
Sabine Gleich, Alice Schaffer, Cam Hong Mai, Sylvia Schick, Bertrand Hirl
BACKGROUND: A number of risk factors for C. difficile infection (CDI) are described in the literature, in particular an antibiotic therapy 4-6 weeks before disease, an age of >65 years, immunosuppression and living in a long-term care facility. Increasing incidence rates have been reported for Germany. CDI is the fourth most common nosocomial infection with 6.4%. AIM: Due to the amendment of the Infection Protection Act of 01.05.2016, the proportion of all deaths that are C...
October 2017: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
https://www.readbyqxmd.com/read/28687726/propagation-based-phase-contrast-x-ray-imaging-at-a-compact-light-source
#9
Regine Gradl, Martin Dierolf, Lorenz Hehn, Benedikt Günther, Ali Önder Yildirim, Bernhard Gleich, Klaus Achterhold, Franz Pfeiffer, Kaye Susannah Morgan
We demonstrate the applicability of propagation-based X-ray phase-contrast imaging at a laser-assisted compact light source with known phantoms and the lungs and airways of a mouse. The Munich Compact Light Source provides a quasi-monochromatic beam with partial spatial coherence, and high flux relative to other non-synchrotron sources (up to 10(10) ph/s). In our study we observe significant edge-enhancement and quantitative phase-retrieval is successfully performed on the known phantom. Furthermore the images of a small animal show the potential for live bio-imaging research studies that capture biological function using short exposures...
July 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28684858/in-vivo-x-ray-dark-field-chest-radiography-of-a-pig
#10
Lukas B Gromann, Fabio De Marco, Konstantin Willer, Peter B Noël, Kai Scherer, Bernhard Renger, Bernhard Gleich, Klaus Achterhold, Alexander A Fingerle, Daniela Muenzel, Sigrid Auweter, Katharina Hellbach, Maximilian Reiser, Andrea Baehr, Michaela Dmochewitz, Tobias J Schroeter, Frieder J Koch, Pascal Meyer, Danays Kunka, Juergen Mohr, Andre Yaroshenko, Hanns-Ingo Maack, Thomas Pralow, Hendrik van der Heijden, Roland Proksa, Thomas Koehler, Nataly Wieberneit, Karsten Rindt, Ernst J Rummeny, Franz Pfeiffer, Julia Herzen
X-ray chest radiography is an inexpensive and broadly available tool for initial assessment of the lung in clinical routine, but typically lacks diagnostic sensitivity for detection of pulmonary diseases in their early stages. Recent X-ray dark-field (XDF) imaging studies on mice have shown significant improvements in imaging-based lung diagnostics. Especially in the case of early diagnosis of chronic obstructive pulmonary disease (COPD), XDF imaging clearly outperforms conventional radiography. However, a translation of this technique towards the investigation of larger mammals and finally humans has not yet been achieved...
July 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28619060/incidence-disease-onset-and-short-term-outcome-in-urea-cycle-disorders-cross-border-surveillance-in-germany-austria-and-switzerland
#11
Susanne Nettesheim, Stefan Kölker, Daniela Karall, Johannes Häberle, Roland Posset, Georg F Hoffmann, Beate Heinrich, Florian Gleich, Sven F Garbade
BACKGROUND: Urea cycle disorders (UCDs) are a group of rare inherited metabolic disorders. Affected individuals often present with hyperammonemic encephalopathy (HE) and have an increased risk of severe neurologic disease and early death. The study aims to provide epidemiologic data and to describe the disease manifestation and short-term outcome. METHOD: Cross-border surveillance of newly diagnosed patients with UCDs - below 16 years of age - was performed from July 2012 to June 2015 in Germany and Austria and from January 2012 to December 2015 in Switzerland...
June 15, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28609302/association-between-exposure-of-young-children-to-procedures-requiring-general-anesthesia-and-learning-and-behavioral-outcomes-in-a-population-based-birth-cohort
#12
Danqing Hu, Randall P Flick, Michael J Zaccariello, Robert C Colligan, Slavica K Katusic, Darrell R Schroeder, Andrew C Hanson, Shonie L Buenvenida, Stephen J Gleich, Robert T Wilder, Juraj Sprung, David O Warner
BACKGROUND: Exposure of young animals to general anesthesia causes neurodegeneration and lasting behavioral abnormalities; whether these findings translate to children remains unclear. This study used a population-based birth cohort to test the hypothesis that multiple, but not single, exposures to procedures requiring general anesthesia before age 3 yr are associated with adverse neurodevelopmental outcomes. METHODS: A retrospective study cohort was assembled from children born in Olmsted County, Minnesota, from 1996 to 2000 (inclusive)...
August 2017: Anesthesiology
https://www.readbyqxmd.com/read/28604579/how-to-avoid-a-learning-curve-in-stapedotomy-a-standardized-surgical-technique
#13
Pingling Kwok, Otto Gleich, Katharina Dalles, Elisabeth Mayr, Peter Jacob, Jürgen Strutz
OBJECTIVE: To evaluate, whether a learning curve for beginners in stapedotomy can be avoided by using a prosthesis with thermal memory-shape attachment in combination with a standardized laser-assisted surgical technique. STUDY DESIGN: Retrospective case review. SETTING: Tertiary referral center. PATIENTS: Fifty-eight ears were operated by three experienced surgeons and compared with a group of 12 cases operated by a beginner in stapedotomy...
August 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28557803/grueneisen-approach-for-the-experimental-determination-of-transient-spin-and-phonon-energies-from-ultrafast-x-ray-diffraction-data-gadolinium
#14
A Koc, M Reinhardt, A von Reppert, M Rössle, W Leitenberger, M Gleich, M Weinelt, F Zamponi, M Bargheer
We study gadolinium thin films as a model system for ferromagnets with negative thermal expansion. Ultrashort laser pulses heat up the electronic subsystem and we follow the transient strain via ultrafast x-ray diffraction. In terms of a simple Grueneisen approach, the strain is decomposed into two contributions proportional to the thermal energy of spin and phonon subsystems. Our analysis reveals that upon femtosecond laser excitation, phonons and spins can be driven out of thermal equilibrium for several nanoseconds...
July 5, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28551586/analysis-of-2d-nmr-relaxation-data-using-chisholm-approximations
#15
S Huber, A Haase, B Gleich
To analyze 2D NMR relaxation data based on a discrete delta-like relaxation map we extended the Padé-Laplace method to two dimensions. We approximate the forward Laplace image of the time domain signal by a Chisholm approximation, i.e. a rational polynomial in two dimensions. The poles and residues of this approximation correspond to the relaxation rates and weighting factors of the underlying relaxation map. In this work we explain the principle ideas of our algorithm and demonstrate its applicability. Therefore we compare the inversion results of the Chisholm approximation and Tikhonov regularization method as a function of SNR when the investigated signal is based on a given discrete relaxation map...
May 19, 2017: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/28514601/mepolizumab-or-placebo-for-eosinophilic-granulomatosis-with-polyangiitis
#16
RANDOMIZED CONTROLLED TRIAL
Michael E Wechsler, Praveen Akuthota, David Jayne, Paneez Khoury, Amy Klion, Carol A Langford, Peter A Merkel, Frank Moosig, Ulrich Specks, Maria C Cid, Raashid Luqmani, Judith Brown, Stephen Mallett, Richard Philipson, Steve W Yancey, Jonathan Steinfeld, Peter F Weller, Gerald J Gleich
BACKGROUND: Eosinophilic granulomatosis with polyangiitis is an eosinophilic vasculitis. Mepolizumab, an anti-interleukin-5 monoclonal antibody, reduces blood eosinophil counts and may have value in the treatment of eosinophilic granulomatosis with polyangiitis. METHODS: In this multicenter, double-blind, parallel-group, phase 3 trial, we randomly assigned participants with relapsing or refractory eosinophilic granulomatosis with polyangiitis who had received treatment for at least 4 weeks and were taking a stable prednisolone or prednisone dose to receive 300 mg of mepolizumab or placebo, administered subcutaneously every 4 weeks, plus standard care, for 52 weeks...
May 18, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28478919/pharyngeal-mucosa-brushing-does-not-correlate-with-disease-activity-in-patients-with-eosinophilic-esophagitis
#17
Hedieh Saffari, Krista Baer, Kathleen K Boynton, Gerald J Gleich, Kathryn A Peterson
No abstract text is available yet for this article.
September 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28475562/leukocyte-adhesion-as-an-indicator-of-oxygenator-thrombosis-during-extracorporeal-membrane-oxygenation-therapy
#18
Julius Wilm, Alois Philipp, Thomas Müller, Andre Bredthauer, Otto Gleich, Christof Schmid, Karla Lehle
Thrombosis is the most common technical complication with extracorporeal membrane oxygenation (ECMO). Accumulations of leukocytes on the gas exchange membranes within a membrane oxygenator (MO) may initiate thrombosis and influence outcome. MOs (n = 41) were removed routinely from adult patients on ECMO, preserved, and analyzed for their cellular deposits using nuclear (4',6-diamidino-2-phenylindole) and cell type-specific markers (CD45; von Willebrand factor, vWF). The extent of cellular colonization was correlated with patient data...
May 4, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28432171/ascites-in-a-patient-with-episodic-angio-oedema-and-eosinophilia-thinking-outside-the-box
#19
Eirini I Rigopoulou, Maria Ioannou, Georgia Papadamou, Georgios N Dalekos
Episodic angio-oedema with eosinophilia (EAE) or Gleich's syndrome is a rare condition characterised by recurrent episodes of oedema and eosinophilia, accompanied by urticaria, fever and weight gain. The presence of ascites has not been reported so far. We report a 21-year-old Caucasian woman who presented with marked ocular oedema and ascites. Laboratory evaluation revealed marked eosinophilia. During the last 3 months, three episodes of facial and neck oedema were reported, which resolved spontaneously over a period of 3-5 days...
April 21, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28398211/influence-of-the-pump-pulse-wavelength-on-the-ultrafast-demagnetization-of-gd-0001-thin-films
#20
Kamil Bobowski, Markus Gleich, Niko Pontius, Christian Schuessler-Langeheine, Christoph Trabant, Marko Wietstruk, Björn Frietsch, Martin Weinelt
We studied the magnetization dynamics of gadolinium metal after femtosecond laser excitation recording the X-ray magnetic circular dichroism in reflection (XMCD-R) at the Gd $M_5$ absorption edge. Varying the photon energy of the pump pulse allows us to change the initial energy distribution of photoexcited carriers. The overall similar response for excitation with 0.95, 1.55 and 3.10\,eV photons at comparable pump fluences indicates that ultrafast ballistic carrier transport leads to a homogeneous energy distribution on the femtosecond timescale in the probed sample volume...
April 11, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
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