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https://www.readbyqxmd.com/read/28340339/targeted-apoptosis-of-senescent-cells-restores-tissue-homeostasis-in-response-to-chemotoxicity-and-aging
#1
Marjolein P Baar, Renata M C Brandt, Diana A Putavet, Julian D D Klein, Kasper W J Derks, Benjamin R M Bourgeois, Sarah Stryeck, Yvonne Rijksen, Hester van Willigenburg, Danny A Feijtel, Ingrid van der Pluijm, Jeroen Essers, Wiggert A van Cappellen, Wilfred F van IJcken, Adriaan B Houtsmuller, Joris Pothof, Ron W F de Bruin, Tobias Madl, Jan H J Hoeijmakers, Judith Campisi, Peter L J de Keizer
The accumulation of irreparable cellular damage restricts healthspan after acute stress or natural aging. Senescent cells are thought to impair tissue function, and their genetic clearance can delay features of aging. Identifying how senescent cells avoid apoptosis allows for the prospective design of anti-senescence compounds to address whether homeostasis can also be restored. Here, we identify FOXO4 as a pivot in senescent cell viability. We designed a FOXO4 peptide that perturbs the FOXO4 interaction with p53...
March 23, 2017: Cell
https://www.readbyqxmd.com/read/28333985/the-role-of-above-ground-competition-and-nitrogen-vs-phosphorus-enrichment-in-seedling-survival-of-common-european-plant-species-of-semi-natural-grasslands
#2
Tobias Ceulemans, Eva Hulsmans, Sigi Berwaers, Kasper Van Acker, Olivier Honnay
Anthropogenic activities have severely altered fluxes of nitrogen and phosphorus in ecosystems worldwide. In grasslands, subsequent negative effects are commonly attributed to competitive exclusion of plant species following increased above-ground biomass production. However, some studies have shown that this does not fully account for nutrient enrichment effects, questioning whether lowering competition by reducing grassland productivity through mowing or herbivory can mitigate the environmental impact of nutrient pollution...
2017: PloS One
https://www.readbyqxmd.com/read/28331374/clinical-experience-and-skills-of-physicians-in-hospital-cardiac-arrest-teams-in-denmark-a-nationwide-study
#3
Kasper G Lauridsen, Anders S Schmidt, Philip Caap, Rasmus Aagaard, Bo Løfgren
BACKGROUND: The quality of in-hospital resuscitation is poor and may be affected by the clinical experience and cardiopulmonary resuscitation (CPR) training. This study aimed to investigate the clinical experience, self-perceived skills, CPR training and knowledge of the guidelines on when to abandon resuscitation among physicians of cardiac arrest teams. METHODS: We performed a nationwide cross-sectional study in Denmark. Telephone interviews were conducted with physicians in the cardiac arrest teams in public somatic hospitals using a structured questionnaire...
2017: Open Access Emergency Medicine: OAEM
https://www.readbyqxmd.com/read/28330953/your-mitochondria-are-what-you-eat-a-high-fat-or-a-high-sucrose-diet-eliminates-metabolic-flexibility-in-isolated-mitochondria-from-rat-skeletal-muscle
#4
Wenche Jørgensen, Kasper A Rud, Ole H Mortensen, Lis Frandsen, Niels Grunnet, Bjørn Quistorff
Extreme diets consisting of either high fat (HF) or high sucrose (HS) may lead to insulin resistance in skeletal muscle, often associated with mitochondrial dysfunction. However, it is not known if these diets alter normal interactions of pyruvate and fatty acid oxidation at the level of the mitochondria. Here, we report that rat muscle mitochondria does show the normal Randle-type fat-carbohydrate interaction seen in vivo. The mechanism behind this metabolic flexibility at the level of the isolated mitochondria is a regulation of the flux-ratio: pyruvate dehydrogenase (PDH)/β-oxidation to suit the actual substrate availability, with the PDH flux as the major point of regulation...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28326464/meningiomas-in-pregnancy-timing-of-surgery-and-clinical-outcomes-as-observed-in-104-cases-and-establishment-of-a-best-management-strategy
#5
REVIEW
Yosef Laviv, Ahmed Bayoumi, Anand Mahadevan, Brett Young, Myles Boone, Ekkehard M Kasper
BACKGROUND: There is a strong correlation between the level of circulating female sex hormones and the parturient growth of meningiomas. As a result, rapid changes in meningioma size occur during pregnancy, putting both the mother and fetus at risk. Large, symptomatic meningiomas require surgical resection, regardless of the status of pregnancy. However, the preferred timing of such complex intervention is a matter of debate. The rarity of this clinical scenario and the absence of prospective trials make it difficult to reach evidence-based conclusions...
March 22, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28324905/-occurence-of-paget-s-disease-in-a-reconstructed-nipple-25-years-after-performing-nipple-sharing-technique
#6
S Kühn, N Josipovic, L Kasper, M-O Riener, U M Rieger, A Bozkurt
No abstract text is available yet for this article.
March 21, 2017: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/28324607/sted-imaging-in-drosophila-brain-slices
#7
Sandra Fendl, Jesús Pujol-Martí, Joel Ryan, Alexander Borst, Robert Kasper
Super-resolution microscopy is a very powerful tool to investigate fine cellular structures and molecular arrangements in biological systems. For instance, stimulated emission depletion (STED) microscopy has been successfully used in recent years to investigate the arrangement and colocalization of different protein species in cells in culture and on the surface of specimens. However, because of its extreme sensitivity to light scattering, super-resolution imaging deep inside tissues remains a challenge. Here, we describe the preparation of thin slices from the fruit fly (Drosophila melanogaster) brain, subsequent immunolabeling and imaging with STED microscopy...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28322047/thiol-ene-monolithic-pepsin-microreactor-with-a-3d-printed-interface-for-efficient-uplc-ms-peptide-mapping-analyses
#8
Alexander Jönsson, Rasmus R Svejdal, Nanna B Bøgelund, Tam T T N Nguyen, Henrik Flindt, Jörg P Kutter, Kasper D Rand, Josiane Penelope Lafleur
To improve the sample handling, and reduce cost and preparation time, of peptide mapping LC-MS workflows in protein analytical research, we here investigate the possibility of replacing conventional enzymatic digestion methods with a polymer microfluidic chip-based enzyme reactor. Off-stoichiometric thiol-ene is utilized as both bulk material and as a monolithic stationary phase for immobilization of the proteolytic enzyme pepsin. The digestion efficiency of the, thiol-ene based, immobilized enzym reactor (IMER) is compared to that of a conventional, agarose packed bed, pepsin IMER column commonly used in LC-MS-based protein analyses...
March 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28319824/effect-of-long-term-remote-ischaemic-conditioning-on-platelet-function-and-fibrinolysis-in-patients-with-chronic-ischaemic-heart-failure
#9
Kasper Pryds, Jacobina Kristiansen, Søs Neergaard-Petersen, Roni R Nielsen, Michael R Schmidt, Jens Refsgaard, Steen D Kristensen, Hans Erik Bøtker, Anne-Mette Hvas, Erik L Grove
INTRODUCTION: Remote ischaemic conditioning (RIC) protects against ischaemia-reperfusion injury through cellular protective pathways, but may also modulate haemostasis. We aimed to investigate the effect of long-term RIC on platelet function and fibrinolysis in patients with chronic ischaemic heart failure (CIHF). MATERIAL AND METHODS: In a prospective, outcome-assessor blinded, paired study, 16 patients with CIHF and 21 age- and gender-matched controls without ischaemic heart disease (IHD) were treated with RIC once daily for 28±4days...
March 10, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28319423/silexan-does-not-cause-withdrawal-symptoms-even-when-abruptly-discontinued
#10
M Gastpar, W E Müller, H P Volz, H J Möller, S Schläfke, A Dienel, S Kasper
OBJECTIVE: Subsequent to a randomised, double-blind, double dummy clinical trial assessing the efficacy of silexan compared to placebo and paroxetine in patients suffering from generalised anxiety disorder (GAD), a 1week follow-up phase was added in order to assess possible withdrawal symptoms of silexan after abrupt discontinuation. METHODS: Participants received silexan 80 mg/d, silexan 160 mg/d, paroxetine 20 mg/d, or placebo at a ratio of 1:1:1:1. Study medication was discontinued after the 10 week active treatment phase of the original trial...
March 20, 2017: International Journal of Psychiatry in Clinical Practice
https://www.readbyqxmd.com/read/28319344/mesoscale-polarization-by-geometric-frustration-in-columnar-supramolecular-crystals
#11
Christoph S Zehe, Joshua A Hill, Nicholas P Funnell, Klaus Kreger, Kasper P van der Zwan, Andrew L Goodwin, Hans-Werner Schmidt, Jürgen Senker
Columnar supramolecular phases with polarization along the columnar axis have potential for the development of ultrahigh-density memories as every single column might function as a memory element. By investigating structure and disorder for four columnar benzene-1,3,5-trisamides by total X-ray scattering and DFT calculations, we demonstrate that the column orientation, and thus the columnar dipole moment, is receptive to geometric frustration if the columns aggregate in a hexagonal rod packing. The frustration suppresses conventional antiferroelectric order and heightens the sensitivity towards collective intercolumnar packing effects...
March 20, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28317581/radical-prostatectomy-in-denmark-survival-analysis-and-temporal-trends-in-clinicopathological-parameters-with-up-to-20-years-of-follow-up
#12
Mikael Heering, Kasper Drimer Berg, Klaus Brasso, Peter Iversen, Martin Andreas Røder
OBJECTIVES: To describe mortality, cause of death, and temporal trends in clinicopathological parameters with up to 20 years of follow-up in a nationwide cohort of prostate cancer (PCa) patients who underwent radical prostatectomy (RP). MATERIALS AND METHODS: A total of 6857 patients with PCa treated with RP at six different hospitals in Denmark between 1995 and 2011. Data were extracted from the nationwide DaPCa database. Histopathology reports from the RP specimens were manually reviewed...
March 2017: Surgical Oncology
https://www.readbyqxmd.com/read/28317454/comparison-of-methods-for-estimating-glomerular-filtration-rate-in-head-and-neck-cancer-patients-treated-with-cisplatin
#13
Lotte Lindberg, Kasper Brødbæk, Erik G Hägerström, Jens Bentzen, Bent Kristensen, Bo Zerahn
Cisplatin is a chemotherapeutic agent widely used in the treatment of various solid tumors. Cisplatin induces nephrotoxicity and may lead to long-term reduction of kidney function. Consequently, determination of glomerular filtration rate (GFR) is used to monitor potential kidney damage. This study aimed to compare two commonly used algorithms for estimating GFR (eGFR) from plasma creatinine (PCr) with (51)Cr-EDTA clearance (CrCl) as a reference method. This was a retrospective single center study of 94 head and neck cancer patients treated with cisplatin...
March 20, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28314889/reconstructing-the-anterolateral-ligament-does-not-decrease-rotational-knee-laxity-in-acl-reconstructed-knees
#14
Kasper Stentz-Olesen, Emil Toft Nielsen, Sepp de Raedt, Peter Bo Jørgensen, Ole Gade Sørensen, Bart Kaptein, Kjeld Søballe, Maiken Stilling
PURPOSE: Little is known about the anterolateral ligament's (ALL) influence on knee laxity. The purpose of this study was to investigate rotational knee laxity against a pure axial rotational stress using radiostereometric analysis (RSA) after cutting and reconstructing both the anterior cruciate ligament (ACL) and the ALL. METHODS: Eight human donor legs were positioned and stereoradiographically recorded at 0°, 30° and 60° of knee flexion using a motorised fixture, while an internally rotating force of 4 Nm was applied to the foot...
March 17, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28314775/insights-into-rad3-kinase-recruitment-from-the-crystal-structure-of-the-dna-damage-checkpoint-protein-rad26
#15
Kasper Røjkjær Andersen
Metabolic products and environmental factors constantly damage DNA. To protect against these insults and maintain genome integrity, cells have evolved mechanisms to repair DNA lesions. One such mechanism involves Rad3, a master kinase coordinating the DNA damage response. Rad26 is a functional subunit of the Rad3-Rad26 complex and responsible for bringing the kinase to sites of DNA damage. Here, I present the crystal structure of Rad26 and identify the elements important for recruiting Rad3. The structure suggests that Rad26 is a dimer with a conserved interface in the N-terminal part of the protein...
March 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28304312/cognitive-rehabilitation-in-alzheimer-s-disease-a-controlled-intervention-trial
#16
Katharina Brueggen, Elisabeth Kasper, Sina Ochmann, Henrike Pfaff, Steffi Webel, Wolfgang Schneider, Stefan Teipel
BACKGROUND: Cognitive Rehabilitation for Alzheimer's disease (AD) is an integrative multimodal intervention. It aims to maintain autonomy and quality of life by enhancing the patients' abilities to compensate for decreased cognitive functioning. OBJECTIVE: We evaluated the feasibility of a group-based Cognitive Rehabilitation approach in mild AD dementia and assessed its effect on activities of daily living (ADL). METHODS: We included 16 patients with AD dementia in a controlled partial-randomized design...
March 18, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28297715/autism-gene-ube3a-and-seizures-impair-sociability-by-repressing-vta-cbln1
#17
Vaishnav Krishnan, David C Stoppel, Yi Nong, Mark A Johnson, Monica J S Nadler, Ekim Ozkaynak, Brian L Teng, Ikue Nagakura, Fahim Mohammad, Michael A Silva, Sally Peterson, Tristan J Cruz, Ekkehard M Kasper, Ramy Arnaout, Matthew P Anderson
Maternally inherited 15q11-13 chromosomal triplications cause a frequent and highly penetrant type of autism linked to increased gene dosages of UBE3A, which encodes a ubiquitin ligase with transcriptional co-regulatory functions. Here, using in vivo mouse genetics, we show that increasing UBE3A in the nucleus downregulates the glutamatergic synapse organizer Cbln1, which is needed for sociability in mice. Epileptic seizures also repress Cbln1 and are found to expose sociability impairments in mice with asymptomatic increases in UBE3A...
March 23, 2017: Nature
https://www.readbyqxmd.com/read/28291964/application-of-a-parallelizable-perfusion-bioreactor-for-physiologic-3d-cell-culture
#18
Dominik Egger, Sarah Spitz, Monica Fischer, Stephan Handschuh, Martin Glösmann, Benedikt Friemert, Monika Egerbacher, Cornelia Kasper
It is crucial but challenging to keep physiologic conditions during the cultivation of 3D cell scaffold constructs for the optimization of 3D cell culture processes. Therefore, we demonstrate the benefits of a recently developed miniaturized perfusion bioreactor together with a specialized incubator system that allows for the cultivation of multiple samples while screening different conditions. Hence, a decellularized bone matrix was tested towards its suitability for 3D osteogenic differentiation under flow perfusion conditions...
March 15, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28291423/preclinical-evaluation-of-convection-enhanced-delivery-of-liposomal-doxorubicin-to-treat-pediatric-diffuse-intrinsic-pontine-glioma-and-thalamic-high-grade-glioma
#19
A Charlotte P Sewing, Tonny Lagerweij, Dannis G van Vuurden, Michaël H Meel, Susanna J E Veringa, Angel M Carcaboso, Pieter J Gaillard, W Peter Vandertop, Pieter Wesseling, David Noske, Gertjan J L Kaspers, Esther Hulleman
OBJECTIVE Pediatric high-grade gliomas (pHGGs) including diffuse intrinsic pontine gliomas (DIPGs) are primary brain tumors with high mortality and morbidity. Because of their poor brain penetrance, systemic chemotherapy regimens have failed to deliver satisfactory results; however, convection-enhanced delivery (CED) may be an alternative mode of drug delivery. Anthracyclines are potent chemotherapeutics that have been successfully delivered via CED in preclinical supratentorial glioma models. This study aims to assess the potency of anthracyclines against DIPG and pHGG cell lines in vitro and to evaluate the efficacy of CED with anthracyclines in orthotopic pontine and thalamic tumor models...
February 17, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28289719/type-i-interferons-regulate-susceptibility-to-inflammation-induced-preterm-birth
#20
Monica Cappelletti, Pietro Presicce, Matthew J Lawson, Vandana Chaturvedi, Traci E Stankiewicz, Simone Vanoni, Isaac T W Harley, Jaclyn W McAlees, Daniel A Giles, Maria E Moreno-Fernandez, Cesar M Rueda, Paranth Senthamaraikannan, Xiaofei Sun, Rebekah Karns, Kasper Hoebe, Edith M Janssen, Christopher L Karp, David A Hildeman, Simon P Hogan, Suhas G Kallapur, Claire A Chougnet, Sing Sing Way, Senad Divanovic
Preterm birth (PTB) is a leading worldwide cause of morbidity and mortality in infants. Maternal inflammation induced by microbial infection is a critical predisposing factor for PTB. However, biological processes associated with competency of pathogens, including viruses, to induce PTB or sensitize for secondary bacterial infection-driven PTB are unknown. We show that pathogen/pathogen-associated molecular pattern-driven activation of type I IFN/IFN receptor (IFNAR) was sufficient to prime for systemic and uterine proinflammatory chemokine and cytokine production and induction of PTB...
March 9, 2017: JCI Insight
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