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  • Lunar and Planetary Science and Exploration  (175)
  • ASTROPHYSICS
  • Life and Medical Sciences
  • Mice, Inbred C57BL
  • 2010-2014  (282)
  • 1950-1954
  • 1930-1934  (18)
  • 2013  (151)
  • 2011  (131)
  • 1933  (9)
  • 1932  (8)
  • 1930  (1)
Collection
Keywords
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  • 2010-2014  (282)
  • 1950-1954
  • 1930-1934  (18)
Year
  • 1
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    Mars Hand Lens Imager (MAHLI) Efforts and Observations at the Rocknest Eolian Sand Shadow in Curiosity's Gale Crater Field Site (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Mars Science Laboratory (MSL) mission is focused on assessing the past or present habitability of Mars, through interrogation of environment and environmental records at the Curiosity rover field site in Gale crater. The MSL team has two methods available to collect, process and deliver samples to onboard analytical laboratories, the Chemistry and Mineralogy instrument (CheMin) and the Sample Analysis at Mars (SAM) instrument suite. One approach obtains samples by drilling into a rock, the other uses a scoop to collect loose regolith fines. Scooping was planned to be first method performed on Mars because materials could be readily scooped multiple times and used to remove any remaining, minute terrestrial contaminants from the sample processing system, the Collection and Handling for In-Situ Martian Rock Analysis (CHIMRA). Because of this cleaning effort, the ideal first material to be scooped would consist of fine to very fine sand, like the interior of the Serpent Dune studied by the Mars Exploration Rover (MER) Spirit team in 2004 [1]. The MSL team selected a linear eolian deposit in the lee of a group of cobbles they named Rocknest (Fig. 1) as likely to be similar to Serpent Dune. Following the definitions in Chapter 13 of Bagnold [2], the deposit is termed a sand shadow. The scooping campaign occurred over approximately 6 weeks in October and November 2012. To support these activities, the Mars Hand Lens Imager (MAHLI) acquired images for engineering support/assessment and scientific inquiry.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-CN-27937 , Lunar and Planetary Science Conference; Mar 18, 2013 - Mar 22, 2013; The Woodlands, TX; United States
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    NASA TECHNICAL REPORTS
  • 2
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    Curiosity's Mars Hand Lens Imager (MAHLI): Inital Observations and Activities (2013)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: MAHLI (Mars Hand Lens Imager) is a 2-megapixel focusable macro lens color camera on the turret on Curiosity's robotic arm. The investigation centers on stratigraphy, grain-scale texture, structure, mineralogy, and morphology of geologic materials at Curiosity's Gale robotic field site. MAHLI acquires focused images at working distances of 2.1 cm to infinity; for reference, at 2.1 cm the scale is 14 microns/pixel; at 6.9 cm it is 31 microns/pixel, like the Spirit and Opportunity Microscopic Imager (MI) cameras.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Lunar and Planetary Science Conference (LPSC 2013); Mar 18, 2013 - Mar 22, 2013; The Woodlands, TX; United States
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  • 3
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    Equilibrative nucleoside transporter 3 deficiency perturbs lysosome function and macrophage homeostasis (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-12-17
    Description: Lysosomal storage diseases (LSDs) are a group of heterogeneous disorders caused by defects in lysosomal enzymes or transporters, resulting in accumulation of undegraded macromolecules or metabolites. Macrophage numbers are expanded in several LSDs, leading to histiocytosis of unknown pathophysiology. Here, we found that mice lacking the equilibrative nucleoside transporter 3 (ENT3) developed a spontaneous and progressive macrophage-dominated histiocytosis. In the absence of ENT3, defective apoptotic cell clearance led to lysosomal nucleoside buildup, elevated intralysosomal pH, and altered macrophage function. The macrophage accumulation was partly due to increased macrophage colony-stimulating factor and receptor expression and signaling secondary to the lysosomal defects. These studies suggest a cellular and molecular basis for the development of histiocytosis in several human syndromes associated with ENT3 mutations and potentially other LSDs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hsu, Chia-Lin -- Lin, Weiyu -- Seshasayee, Dhaya -- Chen, Yung-Hsiang -- Ding, Xiao -- Lin, Zhonghua -- Suto, Eric -- Huang, Zhiyu -- Lee, Wyne P -- Park, Hyunjoo -- Xu, Min -- Sun, Mei -- Rangell, Linda -- Lutman, Jeff L -- Ulufatu, Sheila -- Stefanich, Eric -- Chalouni, Cecile -- Sagolla, Meredith -- Diehl, Lauri -- Fielder, Paul -- Dean, Brian -- Balazs, Mercedesz -- Martin, Flavius -- New York, N.Y. -- Science. 2012 Jan 6;335(6064):89-92. doi: 10.1126/science.1213682. Epub 2011 Dec 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Immunology, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22174130" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine/metabolism ; Animals ; Apoptosis ; Cell Count ; Cell Proliferation ; Cells, Cultured ; Histiocytosis/*physiopathology ; *Homeostasis ; Humans ; Hydrogen-Ion Concentration ; Listeriosis/immunology/microbiology ; Lysosomal Storage Diseases/physiopathology ; Lysosomes/*physiology/ultrastructure ; Macrophage Colony-Stimulating Factor/metabolism ; Macrophages/immunology/*physiology/ultrastructure ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Myelopoiesis ; Nucleoside Transport Proteins/genetics/*physiology ; Phagocytosis ; Receptor, Macrophage Colony-Stimulating Factor/metabolism ; Signal Transduction ; Thymocytes/immunology/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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  • 4
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    Mucus enhances gut homeostasis and oral tolerance by delivering immunoregulatory signals (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-09-28
    Description: A dense mucus layer in the large intestine prevents inflammation by shielding the underlying epithelium from luminal bacteria and food antigens. This mucus barrier is organized around the hyperglycosylated mucin MUC2. Here we show that the small intestine has a porous mucus layer, which permitted the uptake of MUC2 by antigen-sampling dendritic cells (DCs). Glycans associated with MUC2 imprinted DCs with anti-inflammatory properties by assembling a galectin-3-Dectin-1-FcgammaRIIB receptor complex that activated beta-catenin. This transcription factor interfered with DC expression of inflammatory but not tolerogenic cytokines by inhibiting gene transcription through nuclear factor kappaB. MUC2 induced additional conditioning signals in intestinal epithelial cells. Thus, mucus does not merely form a nonspecific physical barrier, but also constrains the immunogenicity of gut antigens by delivering tolerogenic signals.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4005805/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4005805/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shan, Meimei -- Gentile, Maurizio -- Yeiser, John R -- Walland, A Cooper -- Bornstein, Victor U -- Chen, Kang -- He, Bing -- Cassis, Linda -- Bigas, Anna -- Cols, Montserrat -- Comerma, Laura -- Huang, Bihui -- Blander, J Magarian -- Xiong, Huabao -- Mayer, Lloyd -- Berin, Cecilia -- Augenlicht, Leonard H -- Velcich, Anna -- Cerutti, Andrea -- AI073899/AI/NIAID NIH HHS/ -- AI095245/AI/NIAID NIH HHS/ -- AI57653/AI/NIAID NIH HHS/ -- AI61093/AI/NIAID NIH HHS/ -- AI74378/AI/NIAID NIH HHS/ -- AI95613/AI/NIAID NIH HHS/ -- AI96187/AI/NIAID NIH HHS/ -- DK072201/DK/NIDDK NIH HHS/ -- P01 AI061093/AI/NIAID NIH HHS/ -- P01 DK072201/DK/NIDDK NIH HHS/ -- P60 DK020541/DK/NIDDK NIH HHS/ -- R01 AI057653/AI/NIAID NIH HHS/ -- R01 AI093577/AI/NIAID NIH HHS/ -- U01 AI095613/AI/NIAID NIH HHS/ -- U19 AI096187/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2013 Oct 25;342(6157):447-53. doi: 10.1126/science.1237910. Epub 2013 Sep 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24072822" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Dendritic Cells/immunology ; Galectin 3/genetics/metabolism ; Glycosylation ; *Homeostasis ; Humans ; Immune Tolerance/genetics/*immunology ; Inflammation/immunology ; Intestinal Mucosa/immunology ; Intestine, Small/*immunology ; Lectins, C-Type/genetics/metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Mutant Strains ; Mouth/*immunology ; Mucin-2/genetics/physiology ; Mucus/*immunology ; NF-kappa B/metabolism ; Receptors, IgG/genetics/metabolism ; Transcription, Genetic ; beta Catenin/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    APXS of First Rocks Encountered by Curiosity in Gale Crater: Geochemical Diversity and Volatile Element (K and ZN) Enrichment (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Alpha Particle X-ray spectrometer (APXS) on the Curiosity rover in Gale Crater [1] is the 4th such instrument to have landed on Mars [2]. Along the rover's traverse down-section toward Glenelg (through sol 102), the APXS has examined four rocks and one soil [3]. Gale rocks are geochemically diverse and expand the range of Martian rock compositions to include high volatile and alkali contents (up to 3.0 wt% K2O) with high Fe and Mn (up to 29.2% FeO*).
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-CN-27938 , Lunar and Planetary Science Conference; Mar 18, 2013 - Mar 22, 2013; TheWoodlands, TX; United States
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  • 6
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    Differential stem- and progenitor-cell trafficking by prostaglandin E2 (2013)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2013-03-15
    Description: To maintain lifelong production of blood cells, haematopoietic stem cells (HSCs) are tightly regulated by inherent programs and extrinsic regulatory signals received from their microenvironmental niche. Long-term repopulating HSCs reside in several, perhaps overlapping, niches that produce regulatory molecules and signals necessary for homeostasis and for increased output after stress or injury. Despite considerable advances in the specific cellular or molecular mechanisms governing HSC-niche interactions, little is known about the regulatory function in the intact mammalian haematopoietic niche. Recently, we and others described a positive regulatory role for prostaglandin E2 (PGE2) on HSC function ex vivo. Here we show that inhibition of endogenous PGE2 by non-steroidal anti-inflammatory drug (NSAID) treatment in mice results in modest HSC egress from the bone marrow. Surprisingly, this was independent of the SDF-1-CXCR4 axis implicated in stem-cell migration. Stem and progenitor cells were found to have differing mechanisms of egress, with HSC transit to the periphery dependent on niche attenuation and reduction in the retentive molecule osteopontin. Haematopoietic grafts mobilized with NSAIDs had superior repopulating ability and long-term engraftment. Treatment of non-human primates and healthy human volunteers confirmed NSAID-mediated egress in other species. PGE2 receptor knockout mice demonstrated that progenitor expansion and stem/progenitor egress resulted from reduced E-prostanoid 4 (EP4) receptor signalling. These results not only uncover unique regulatory roles for EP4 signalling in HSC retention in the niche, but also define a rapidly translatable strategy to enhance transplantation therapeutically.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3606692/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3606692/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hoggatt, Jonathan -- Mohammad, Khalid S -- Singh, Pratibha -- Hoggatt, Amber F -- Chitteti, Brahmananda R -- Speth, Jennifer M -- Hu, Peirong -- Poteat, Bradley A -- Stilger, Kayla N -- Ferraro, Francesca -- Silberstein, Lev -- Wong, Frankie K -- Farag, Sherif S -- Czader, Magdalena -- Milne, Ginger L -- Breyer, Richard M -- Serezani, Carlos H -- Scadden, David T -- Guise, Theresa A -- Srour, Edward F -- Pelus, Louis M -- CA069158/CA/NCI NIH HHS/ -- CA143057/CA/NCI NIH HHS/ -- DK07519/DK/NIDDK NIH HHS/ -- DK37097/DK/NIDDK NIH HHS/ -- HL07910/HL/NHLBI NIH HHS/ -- HL087735/HL/NHLBI NIH HHS/ -- HL096305/HL/NHLBI NIH HHS/ -- HL100402/HL/NHLBI NIH HHS/ -- P01 DK090948/DK/NIDDK NIH HHS/ -- P30 CA082709/CA/NCI NIH HHS/ -- R01 HL044851/HL/NHLBI NIH HHS/ -- R01 HL096305/HL/NHLBI NIH HHS/ -- England -- Nature. 2013 Mar 21;495(7441):365-9. doi: 10.1038/nature11929. Epub 2013 Mar 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23485965" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Inflammatory Agents, Non-Steroidal/pharmacology ; Cell Count ; Cell Movement/physiology ; Cells, Cultured ; Dinoprostone/*metabolism ; Hematopoietic Stem Cell Mobilization ; Hematopoietic Stem Cells/*cytology/drug effects ; Heterocyclic Compounds/pharmacology ; Humans ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Osteopontin/genetics ; Papio ; Receptors, Prostaglandin E, EP4 Subtype/genetics/metabolism ; Stem Cells/*cytology/drug effects ; Thiazines/pharmacology ; Thiazoles/pharmacology
    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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  • 7
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    Pathogen blocks host death receptor signalling by arginine GlcNAcylation of death domains (2013)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2013-08-21
    Description: The tumour necrosis factor (TNF) family is crucial for immune homeostasis, cell death and inflammation. These cytokines are recognized by members of the TNF receptor (TNFR) family of death receptors, including TNFR1 and TNFR2, and FAS and TNF-related apoptosis-inducing ligand (TRAIL) receptors. Death receptor signalling requires death-domain-mediated homotypic/heterotypic interactions between the receptor and its downstream adaptors, including TNFR1-associated death domain protein (TRADD) and FAS-associated death domain protein (FADD). Here we discover that death domains in several proteins, including TRADD, FADD, RIPK1 and TNFR1, were directly inactivated by NleB, an enteropathogenic Escherichia coli (EPEC) type III secretion system effector known to inhibit host nuclear factor-kappaB (NF-kappaB) signalling. NleB contained an unprecedented N-acetylglucosamine (GlcNAc) transferase activity that specifically modified a conserved arginine in these death domains (Arg 235 in the TRADD death domain). NleB GlcNAcylation (the addition of GlcNAc onto a protein side chain) of death domains blocked homotypic/heterotypic death domain interactions and assembly of the oligomeric TNFR1 complex, thereby disrupting TNF signalling in EPEC-infected cells, including NF-kappaB signalling, apoptosis and necroptosis. Type-III-delivered NleB also blocked FAS ligand and TRAIL-induced cell death by preventing formation of a FADD-mediated death-inducing signalling complex (DISC). The arginine GlcNAc transferase activity of NleB was required for bacterial colonization in the mouse model of EPEC infection. The mechanism of action of NleB represents a new model by which bacteria counteract host defences, and also a previously unappreciated post-translational modification.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Shan -- Zhang, Li -- Yao, Qing -- Li, Lin -- Dong, Na -- Rong, Jie -- Gao, Wenqing -- Ding, Xiaojun -- Sun, Liming -- Chen, Xing -- Chen, She -- Shao, Feng -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Sep 12;501(7466):242-6. doi: 10.1038/nature12436. Epub 2013 Aug 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉College of Biological Sciences, China Agricultural University, Beijing 100094, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23955153" target="_blank"〉PubMed〈/a〉
    Keywords: Acylation ; Animals ; Antigens, CD95/metabolism ; Apoptosis ; Arginine/*metabolism ; Death Domain Receptor Signaling Adaptor Proteins/metabolism ; Disease Models, Animal ; Enteropathogenic Escherichia coli/*metabolism/pathogenicity ; Escherichia coli Infections/metabolism/microbiology/pathology ; Escherichia coli Proteins/*metabolism ; Fas-Associated Death Domain Protein/chemistry/metabolism ; HeLa Cells ; Humans ; Male ; Mice ; Mice, Inbred C57BL ; Multiprotein Complexes/chemistry/metabolism ; N-Acetylglucosaminyltransferases/*metabolism ; NF-kappa B/metabolism ; Protein Biosynthesis ; Protein Structure, Tertiary ; Receptor-Interacting Protein Serine-Threonine Kinases/chemistry/metabolism ; Receptors, Tumor Necrosis Factor, Type I/chemistry/metabolism ; *Signal Transduction ; TNF Receptor-Associated Death Domain Protein/*chemistry/*metabolism ; TNF-Related Apoptosis-Inducing Ligand/metabolism ; Tumor Necrosis Factor-alpha/metabolism ; Virulence ; Virulence Factors/*metabolism
    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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  • 8
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    The TLR4 antagonist Eritoran protects mice from lethal influenza infection (2013)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2013-05-03
    Description: There is a pressing need to develop alternatives to annual influenza vaccines and antiviral agents licensed for mitigating influenza infection. Previous studies reported that acute lung injury caused by chemical or microbial insults is secondary to the generation of host-derived, oxidized phospholipid that potently stimulates Toll-like receptor 4 (TLR4)-dependent inflammation. Subsequently, we reported that Tlr4(-/-) mice are highly refractory to influenza-induced lethality, and proposed that therapeutic antagonism of TLR4 signalling would protect against influenza-induced acute lung injury. Here we report that therapeutic administration of Eritoran (also known as E5564)-a potent, well-tolerated, synthetic TLR4 antagonist-blocks influenza-induced lethality in mice, as well as lung pathology, clinical symptoms, cytokine and oxidized phospholipid expression, and decreases viral titres. CD14 and TLR2 are also required for Eritoran-mediated protection, and CD14 directly binds Eritoran and inhibits ligand binding to MD2. Thus, Eritoran blockade of TLR signalling represents a novel therapeutic approach for inflammation associated with influenza, and possibly other infections.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3725830/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3725830/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shirey, Kari Ann -- Lai, Wendy -- Scott, Alison J -- Lipsky, Michael -- Mistry, Pragnesh -- Pletneva, Lioubov M -- Karp, Christopher L -- McAlees, Jaclyn -- Gioannini, Theresa L -- Weiss, Jerrold -- Chen, Wilbur H -- Ernst, Robert K -- Rossignol, Daniel P -- Gusovsky, Fabian -- Blanco, Jorge C G -- Vogel, Stefanie N -- AI018797/AI/NIAID NIH HHS/ -- AI057575/AI/NIAID NIH HHS/ -- AI059372/AI/NIAID NIH HHS/ -- NCRR K12-RR-023250/PHS HHS/ -- R01 AI018797/AI/NIAID NIH HHS/ -- R01 AI057575/AI/NIAID NIH HHS/ -- R01 AI059372/AI/NIAID NIH HHS/ -- T32 AI007540/AI/NIAID NIH HHS/ -- England -- Nature. 2013 May 23;497(7450):498-502. doi: 10.1038/nature12118. Epub 2013 May 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, University of Maryland, Baltimore, Baltimore, Maryland 21201, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23636320" target="_blank"〉PubMed〈/a〉
    Keywords: Acute Lung Injury/complications/drug therapy/pathology/prevention & control ; Animals ; Antigens, CD14/metabolism ; Antiviral Agents/*pharmacology/therapeutic use ; Cytokines/genetics/immunology ; Disaccharides/metabolism/*pharmacology/*therapeutic use ; Female ; Influenza A Virus, H1N1 Subtype/*drug effects/*pathogenicity ; Ligands ; Lymphocyte Antigen 96/metabolism ; Mice ; Mice, Inbred C57BL ; Orthomyxoviridae Infections/*drug therapy/immunology/pathology/virology ; Sugar Phosphates/metabolism/*pharmacology/*therapeutic use ; Survival Analysis ; Time Factors ; Toll-Like Receptor 2/immunology/metabolism ; Toll-Like Receptor 4/*antagonists & inhibitors/immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 9
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    Autophagy-dependent anticancer immune responses induced by chemotherapeutic agents in mice (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-12-17
    Description: Antineoplastic chemotherapies are particularly efficient when they elicit immunogenic cell death, thus provoking an anticancer immune response. Here we demonstrate that autophagy, which is often disabled in cancer, is dispensable for chemotherapy-induced cell death but required for its immunogenicity. In response to chemotherapy, autophagy-competent, but not autophagy-deficient, cancers attracted dendritic cells and T lymphocytes into the tumor bed. Suppression of autophagy inhibited the release of adenosine triphosphate (ATP) from dying tumor cells. Conversely, inhibition of extracellular ATP-degrading enzymes increased pericellular ATP in autophagy-deficient tumors, reestablished the recruitment of immune cells, and restored chemotherapeutic responses but only in immunocompetent hosts. Thus, autophagy is essential for the immunogenic release of ATP from dying cells, and increased extracellular ATP concentrations improve the efficacy of antineoplastic chemotherapies when autophagy is disabled.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Michaud, Mickael -- Martins, Isabelle -- Sukkurwala, Abdul Qader -- Adjemian, Sandy -- Ma, Yuting -- Pellegatti, Patrizia -- Shen, Shensi -- Kepp, Oliver -- Scoazec, Marie -- Mignot, Gregoire -- Rello-Varona, Santiago -- Tailler, Maximilien -- Menger, Laurie -- Vacchelli, Erika -- Galluzzi, Lorenzo -- Ghiringhelli, Francois -- di Virgilio, Francesco -- Zitvogel, Laurence -- Kroemer, Guido -- New York, N.Y. -- Science. 2011 Dec 16;334(6062):1573-7. doi: 10.1126/science.1208347.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉INSERM, U848, Villejuif, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22174255" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Animals ; Antineoplastic Agents/*pharmacology/therapeutic use ; Autophagy/drug effects/*physiology ; Calreticulin/pharmacology ; Cell Death/immunology ; Cell Line, Tumor ; Dendritic Cells/immunology ; Humans ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Mitoxantrone/pharmacology ; Neoplasms/drug therapy/*immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    Asymmetric B cell division in the germinal center reaction (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-12-17
    Description: Lifelong antibody responses to vaccination require reorganization of lymphoid tissue and dynamic intercellular communication called the germinal center reaction. B lymphocytes undergo cellular polarization during antigen stimulation, acquisition, and presentation, which are critical steps for initiating humoral immunity. Here, we show that germinal center B lymphocytes asymmetrically segregate the transcriptional regulator Bcl6, the receptor for interleukin-21, and the ancestral polarity protein atypical protein kinase C to one side of the plane of division, generating unequal inheritance of fate-altering molecules by daughter cells. Germinal center B lymphocytes from mice with a defect in leukocyte adhesion fail to divide asymmetrically. These results suggest that motile cells lacking constitutive attachment can receive provisional polarity cues from the microenvironment to generate daughter cell diversity and self-renewal.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3282111/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3282111/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barnett, Burton E -- Ciocca, Maria L -- Goenka, Radhika -- Barnett, Lisa G -- Wu, Junmin -- Laufer, Terri M -- Burkhardt, Janis K -- Cancro, Michael P -- Reiner, Steven L -- 3T32GM007170-36S1/GM/NIGMS NIH HHS/ -- AI042370/AI/NIAID NIH HHS/ -- AI065644/AI/NIAID NIH HHS/ -- AI076458/AI/NIAID NIH HHS/ -- R01 AI042370/AI/NIAID NIH HHS/ -- R01 AI042370-14/AI/NIAID NIH HHS/ -- R01 AI042370-15/AI/NIAID NIH HHS/ -- R01 AI061699/AI/NIAID NIH HHS/ -- R01 AI076458/AI/NIAID NIH HHS/ -- R01 AI076458-04/AI/NIAID NIH HHS/ -- R01 AI076458-05/AI/NIAID NIH HHS/ -- T32 AI007532/AI/NIAID NIH HHS/ -- T32 AI055428/AI/NIAID NIH HHS/ -- T32AI055428/AI/NIAID NIH HHS/ -- T32GM07229/GM/NIGMS NIH HHS/ -- T32HD007516/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2012 Jan 20;335(6066):342-4. doi: 10.1126/science.1213495. Epub 2011 Dec 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Abramson Family Cancer Research Institute, University of Pennsylvania, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22174128" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD40/metabolism ; *Asymmetric Cell Division ; B-Lymphocytes/*cytology/*immunology/metabolism ; Cell Adhesion ; Cell Communication ; Cell Polarity ; Cellular Microenvironment ; Cues ; DNA-Binding Proteins/metabolism ; Germinal Center/*cytology/*immunology ; Immunization ; Mice ; Mice, Inbred C57BL ; Mitosis ; Protein Kinase C/metabolism ; Receptors, Interleukin-21/metabolism
    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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