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  • 1
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    Heme oxygenase-1 derived carbon monoxide permits maturation of myeloid cells (2014)
    Springer Nature
    Details
    Publication Date: 2014-03-21
    Description: Heme oxygenase-1 derived carbon monoxide permits maturation of myeloid cells Cell Death and Disease 5, e1139 (March 2014). doi:10.1038/cddis.2014.97 Authors: B Wegiel, A Hedblom, M Li, D Gallo, E Csizmadia, C Harris, Z Nemeth, B S Zuckerbraun, M Soares, J L Persson & L E Otterbein
    Keywords: carbon monoxideheme oxygenase-1macrophagesdifferentiation
    Electronic ISSN: 2041-4889
    Topics: Biology , Medicine
    Published by Springer Nature
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  • 2
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    Structural properties and dielectric function of graphene grown by high-temperature sublimation on 4H-SiC(000-1) (2015)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2015-02-25
    Description: Understanding and controlling growth of graphene on the carbon face (C-face) of SiC presents a significant challenge. In this work, we study the structural, vibrational, and dielectric function properties of graphene grown on the C-face of 4H-SiC by high-temperature sublimation in an argon atmosphere. The effect of growth temperature on the graphene number of layers and crystallite size is investigated and discussed in relation to graphene coverage and thickness homogeneity. An amorphous carbon layer at the interface between SiC and the graphene is identified, and its evolution with growth temperature is established. Atomic force microscopy, micro-Raman scattering spectroscopy, spectroscopic ellipsometry, and high-resolution cross-sectional transmission electron microscopy are combined to determine and correlate thickness, stacking order, dielectric function, and interface properties of graphene. The role of surface defects and growth temperature on the graphene growth mechanism and stacking is discussed, and a conclusion about the critical factors to achieve decoupled graphene layers is drawn.
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 3
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    Vascular smooth muscle cell proliferation depends on caveolin-1-regulated polyamine uptake (2014)
    Portland Press
    Details
    Publication Date: 2014-10-11
    Description: Much evidence highlights the importance of polyamines for vascular smooth muscle cell (VSMC) proliferation and migration. Caveolin-1 (Cav-1) was recently reported to regulate polyamine uptake in intestinal epithelial cells. The aim of the present study was to assess the importance of Cav-1 for VSMC polyamine uptake and its impact on cell proliferation and migration. Cav-1 knockout (KO) mouse aortic cells showed increased polyamine uptake and elevated proliferation and migration compared to wild-type (WT) cells. Both Cav-1 KO and WT cells expressed the smooth muscle differentiation markers SM22 and calponin. Cell-cycle phase distribution analysis revealed a higher proportion of Cav-1 KO than WT cells in the S phase. Cav-1 KO cells were hyper-proliferative in the presence but not in the absence of extracellular polyamines, and, moreover, supplementation with exogenous polyamines promoted proliferation in Cav-1 KO but not in WT cells. Expression of the solute carrier transporters Slc7a1 and Slc43a1 was higher in Cav-1 KO than in WT cells. Ornithine decarboxylase (ODC) protein and mRNA expression as well as ODC activity were similar in Cav-1 KO and WT cells showing unaltered synthesis of polyamines in Cav-1 KO cells. Cav-1 was reduced in migrating cells in vitro and in carotid lesions in vivo . Our data show that Cav-1 negatively regulates VSMC polyamine uptake and that the proliferative advantage of Cav-1 KO cells is critically dependent on polyamine uptake. We provide proof-of-principle for targeting Cav-1-dependent polyamine uptake as a strategy to fight unwanted VSMC proliferation as observed in restenosis.
    Print ISSN: 0144-8463
    Electronic ISSN: 1573-4935
    Topics: Biology , Chemistry and Pharmacology
    Published by Portland Press
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  • 4
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    Recolonizing carnivores and naive prey: conservation lessons from Pleistocene extinctions (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-13
    Description: The current extinction of many of Earth's large terrestrial carnivores has left some extant prey species lacking knowledge about contemporary predators, a situation roughly parallel to that 10,000 to 50,000 years ago, when naive animals first encountered colonizing human hunters. Along present-day carnivore recolonization fronts, brown (also called grizzly) bears killed predator-naive adult moose at disproportionately high rates in Scandinavia, and moose mothers who lost juveniles to recolonizing wolves in North America's Yellowstone region developed hypersensitivity to wolf howls. Although prey that had been unfamiliar with dangerous predators for as few as 50 to 130 years were highly vulnerable to initial encounters, behavioral adjustments to reduce predation transpired within a single generation. The fact that at least one prey species quickly learns to be wary of restored carnivores should negate fears about localized prey extinction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Berger, J -- Swenson, J E -- Persson, I L -- New York, N.Y. -- Science. 2001 Feb 9;291(5506):1036-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Ecology, Evolution, and Conservation Biology, University of Nevada, Reno, NV 89512, USA. berger@unr.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11161215" target="_blank"〉PubMed〈/a〉
    Keywords: Alaska ; Animals ; Arousal ; *Behavior, Animal ; *Carnivora ; *Conservation of Natural Resources ; Cues ; *Deer ; *Ecosystem ; Female ; Male ; Odors ; *Predatory Behavior ; Scandinavian and Nordic Countries ; Ursidae ; Vocalization, Animal ; Wolves ; Wyoming
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Light limitation of nutrient-poor lake ecosystems (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-07-25
    Description: Productivity denotes the rate of biomass synthesis in ecosystems and is a fundamental characteristic that frames ecosystem function and management. Limitation of productivity by nutrient availability is an established paradigm for lake ecosystems. Here, we assess the relevance of this paradigm for a majority of the world's small, nutrient-poor lakes, with different concentrations of coloured organic matter. By comparing small unproductive lakes along a water colour gradient, we show that coloured terrestrial organic matter controls the key process for new biomass synthesis (the benthic primary production) through its effects on light attenuation. We also show that this translates into effects on production and biomass of higher trophic levels (benthic invertebrates and fish). These results are inconsistent with the idea that nutrient supply primarily controls lake productivity, and we propose that a large share of the world's unproductive lakes, within natural variations of organic carbon and nutrient input, are limited by light and not by nutrients. We anticipate that our result will have implications for understanding lake ecosystem function and responses to environmental change. Catchment export of coloured organic matter is sensitive to short-term natural variability and long-term, large-scale changes, driven by climate and different anthropogenic influences. Consequently, changes in terrestrial carbon cycling will have pronounced effects on most lake ecosystems by mediating changes in light climate and productivity of lakes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Karlsson, Jan -- Bystrom, Par -- Ask, Jenny -- Ask, Per -- Persson, Lennart -- Jansson, Mats -- England -- Nature. 2009 Jul 23;460(7254):506-9. doi: 10.1038/nature08179.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Climate Impacts Research Centre, Department of Ecology and Environmental Science, Umea University, Box 62, SE-981 07 Abisko, Sweden. Jan.Karlsson@emg.umu.se〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19626113" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biomass ; Carbon/analysis/metabolism ; *Ecosystem ; Eukaryota/physiology ; Fishes/physiology ; Fresh Water/*chemistry ; *Light ; Nitrogen/analysis ; Phosphorus/analysis ; Sweden
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 6
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    Culling prey promotes predator recovery--alternative states in a whole-lake experiment (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-06-26
    Description: Many top-predator fish stocks in both freshwater and marine systems have collapsed as a result of overharvesting. Consequently, some of these communities have shifted into seemingly irreversible new states. We showed, for predators feeding on prey that exhibit food-dependent growth, that culling of fish prey may promote predator recovery. We removed old stunted individuals of a prey-fish species in a large, low-productive lake, which caused an increase in the availability of small-sized prey and allowed the predator to recover. The shift in community state has been sustained for more than 15 years after the cull ended and represents an experimental demonstration of an alternative stable state in a large-scale field system. Because most animals exhibit food-dependent growth, shifts into alternative stable states resulting from overcompensating prey growth may be common in nature and may require counterintuitive management strategies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Persson, Lennart -- Amundsen, Per-Arne -- De Roos, Andre M -- Klemetsen, Anders -- Knudsen, Rune -- Primicerio, Raul -- New York, N.Y. -- Science. 2007 Jun 22;316(5832):1743-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology and Environmental Science, Umea University, S-901 87 Umea, Sweden. lennart.persson@emg.umu.se〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17588929" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Body Size ; *Ecosystem ; Fishes/*physiology ; Food Chain ; Fresh Water ; Norway ; Population Dynamics ; *Predatory Behavior ; Salmon/physiology ; Trout/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 7
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    Proteomics. Tissue-based map of the human proteome (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-01-24
    Description: Resolving the molecular details of proteome variation in the different tissues and organs of the human body will greatly increase our knowledge of human biology and disease. Here, we present a map of the human tissue proteome based on an integrated omics approach that involves quantitative transcriptomics at the tissue and organ level, combined with tissue microarray-based immunohistochemistry, to achieve spatial localization of proteins down to the single-cell level. Our tissue-based analysis detected more than 90% of the putative protein-coding genes. We used this approach to explore the human secretome, the membrane proteome, the druggable proteome, the cancer proteome, and the metabolic functions in 32 different tissues and organs. All the data are integrated in an interactive Web-based database that allows exploration of individual proteins, as well as navigation of global expression patterns, in all major tissues and organs in the human body.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Uhlen, Mathias -- Fagerberg, Linn -- Hallstrom, Bjorn M -- Lindskog, Cecilia -- Oksvold, Per -- Mardinoglu, Adil -- Sivertsson, Asa -- Kampf, Caroline -- Sjostedt, Evelina -- Asplund, Anna -- Olsson, IngMarie -- Edlund, Karolina -- Lundberg, Emma -- Navani, Sanjay -- Szigyarto, Cristina Al-Khalili -- Odeberg, Jacob -- Djureinovic, Dijana -- Takanen, Jenny Ottosson -- Hober, Sophia -- Alm, Tove -- Edqvist, Per-Henrik -- Berling, Holger -- Tegel, Hanna -- Mulder, Jan -- Rockberg, Johan -- Nilsson, Peter -- Schwenk, Jochen M -- Hamsten, Marica -- von Feilitzen, Kalle -- Forsberg, Mattias -- Persson, Lukas -- Johansson, Fredric -- Zwahlen, Martin -- von Heijne, Gunnar -- Nielsen, Jens -- Ponten, Fredrik -- New York, N.Y. -- Science. 2015 Jan 23;347(6220):1260419. doi: 10.1126/science.1260419.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Science for Life Laboratory, KTH-Royal Institute of Technology, SE-171 21 Stockholm, Sweden. Department of Proteomics, KTH-Royal Institute of Technology, SE-106 91 Stockholm, Sweden. Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, DK-2970 Horsholm, Denmark. mathias.uhlen@scilifelab.se. ; Science for Life Laboratory, KTH-Royal Institute of Technology, SE-171 21 Stockholm, Sweden. ; Science for Life Laboratory, KTH-Royal Institute of Technology, SE-171 21 Stockholm, Sweden. Department of Proteomics, KTH-Royal Institute of Technology, SE-106 91 Stockholm, Sweden. ; Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, SE-751 85 Uppsala, Sweden. ; Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden. ; Science for Life Laboratory, KTH-Royal Institute of Technology, SE-171 21 Stockholm, Sweden. Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, SE-751 85 Uppsala, Sweden. ; Leibniz Research Centre for Working Environment and Human Factors (IfADo) at Dortmund TU, D-44139 Dortmund, Germany. ; Lab Surgpath, Mumbai, India. ; Department of Proteomics, KTH-Royal Institute of Technology, SE-106 91 Stockholm, Sweden. ; Science for Life Laboratory, Department of Neuroscience, Karolinska Institute, SE-171 77 Stockholm, Sweden. ; Center for Biomembrane Research, Department of Biochemistry and Biophysics, Stockholm University, Stockholm, Sweden. ; Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, DK-2970 Horsholm, Denmark. Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25613900" target="_blank"〉PubMed〈/a〉
    Keywords: Alternative Splicing ; Cell Line ; *Databases, Protein ; Female ; Genes ; Genetic Code ; Humans ; Internet ; Male ; Membrane Proteins/genetics/metabolism ; Mitochondrial Proteins/genetics/metabolism ; Neoplasms/genetics/metabolism ; Protein Array Analysis ; Protein Isoforms/genetics/metabolism ; Proteome/genetics/*metabolism ; Tissue Distribution ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 8
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    Heterogeneous staining: a tool for studies of how fluorescent dyes affect the physical properties of DNA (2013)
    Oxford University Press
    Details
    Publication Date: 2013-10-19
    Description: The commonly used fluorescent dye YOYO-1 (YOYO) has, using bulk techniques, been demonstrated to stain DNA heterogeneously at substoichiometric concentrations. We here, using nanofluidic channels and fluorescence microscopy, investigate the heterogeneous staining on the single DNA molecule level and demonstrate that the dye distribution is continuous. The equilibration of YOYO on DNA is extremely slow but can be accelerated by increasing the ionic strength and/or the temperature. Furthermore, we demonstrate how to use the heterogeneous staining as a tool for detailed and time-efficient studies of how fluorescent dyes affect the physical properties of DNA. We show that the relative increase in extension of DNA with increasing amount of YOYO bound is higher at low ionic strengths and also extrapolate the extension of native DNA. Our study reveals important information on how YOYO affects the physical properties of DNA, but it also has broader applications. First, it reveals how cationic intercalators, such as potential DNA drugs, affect DNA under strong confinement. Second, the strategy of using heterogeneous staining is of general use for single molecule studies of DNA interacting with proteins or ligands.
    Keywords: Nucleic acid structure, Phsyical and Biochemical Characterisation of DNA
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
    Published by Oxford University Press
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  • 9
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    Heterodimers of photoreceptor-specific nuclear receptor (PNR/NR2E3) and peroxisome proliferator-activated receptor-γ (PPARγ) are disrupted by retinal disease-associated mutations (2017)
    Springer Nature
    Details
    Publication Date: 2017-03-17
    Description: Heterodimers of photoreceptor-specific nuclear receptor (PNR/NR2E3) and peroxisome proliferator-activated receptor-γ (PPARγ) are disrupted by retinal disease-associated mutations Cell Death and Disease 8, e2677 (March 2017). doi:10.1038/cddis.2017.98 Authors: Joel Fulton, Bismoy Mazumder, Jonathan B Whitchurch, Cintia J Monteiro, Hilary M Collins, Chun M Chan, Maria P Clemente, Miguel Hernandez-Quiles, Elizabeth A Stewart, Winfried M Amoaku, Paula M Moran, Nigel P Mongan, Jenny L Persson, Simak Ali & David M Heery
    Electronic ISSN: 2041-4889
    Topics: Biology , Medicine
    Published by Springer Nature
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  • 10
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    Discrimination between Breast Cancer Cells and White Blood Cells by Non-Invasive Measurements: Implications for a Novel In Vitro-Based Circulating Tumor Cell Model Using Digital Holographic Cytometry (2020)
    Molecular Diversity Preservation International
    Details
    Publication Date: 2020-07-15
    Description: Breast cancer is the second most common cancer worldwide. Metastasis is the main reason for death in breast cancer, and today, there is a lack of methods to detect and isolate circulating tumor cells (CTCs), mainly due to their heterogeneity and rarity. There are some systems that are designed to detect rare epithelial cancer cells in whole blood based on the most common marker used today, the epithelial cell adhesion molecule (EpCAM). It has been shown that aggressive breast cancer metastases are of non-epithelial origin and are therefore not always detected using EpCAM as a marker. In the present study, we used an in vitro-based circulating tumor cell model comprising a collection of six breast cancer cell lines and white blood cell lines. We used digital holographic cytometry (DHC) to characterize and distinguish between the different cell types by area, volume and thickness. Here, we present significant differences in cell size-related parameters observed when comparing white blood cells and breast cancer cells by using DHC. In conclusion, DHC can be a powerful diagnostic tool for the characterization of CTCs in the blood.
    Electronic ISSN: 2076-3417
    Topics: Natural Sciences in General
    Published by Molecular Diversity Preservation International
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