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  • 1
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    TFEB controls vascular development by regulating the proliferation of endothelial cells (2018)
    Springer Nature
    Details
    Publication Date: 2018
    Description: 〈sec〉〈st〉Synopsis〈/st〉〈p〉〈textbox textbox-type="graphic"〉〈p〉〈inline-fig〉〈/inline-fig〉〈/p〉〈/textbox〉〈/p〉 〈p〉The transcription factor TFEB regulates lysosomal biogenesis and autophagic flux. Targeted deletion of TFEB in mouse endothelial cells alters the mid and late phase of vascular development, owing to reduced endothelial cell (EC) proliferation and dysregulation of the VEGFR2 pathway.〈/p〉 〈p〉 〈l type="unord"〉〈li〉〈p〉TFEB silencing in ECs reduces CDK4 levels, leading to a block in cell-cycle G1/S transition.〈/p〉〈/li〉 〈li〉〈p〉Silencing of TFEB abrogates miR-15a-5p/miR-16-5p-mediated post-transcriptional control of VEGFR2 mRNA.〈/p〉〈/li〉 〈li〉〈p〉TFEB silencing increases synthesis of MYO1C, a protein involved in VEGFR2 trafficking to the plasma membrane.〈/p〉〈/li〉 〈li〉〈p〉Endothelium-specific depletion of TFEB in mice leads to defects in fetal and newborn vasculature.〈/p〉〈/li〉〈/l〉 〈/p〉〈/sec〉
    Print ISSN: 0261-4189
    Electronic ISSN: 1460-2075
    Topics: Biology , Medicine
    Published by Springer Nature on behalf of The European Molecular Biology Organization (EMBO).
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  • 2
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    TFEB controls vascular development by regulating the proliferation of endothelial cells (2019)
    Springer Nature
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    Publication Date: 2019
    Description: 〈p〉Transcription factor TFEB is thought to control cellular functions—including in the vascular bed—primarily via regulation of lysosomal biogenesis and autophagic flux. Here, we report that TFEB also orchestrates a non-canonical program that controls the cell cycle/VEGFR2 pathway in the developing vasculature. In endothelial cells, TFEB depletion halts proliferation at the G1-S transition by inhibiting the CDK4/Rb pathway. TFEB-deficient cells attempt to compensate for this limitation by increasing VEGFR2 levels at the plasma membrane via microRNA-mediated mechanisms and controlled membrane trafficking. TFEB stimulates expression of the miR-15a/16-1 cluster, which limits VEGFR2 transcript stability and negatively modulates expression of MYO1C, a regulator of VEGFR2 trafficking to the cell surface. Altered levels of miR-15a/16-1 and MYO1C in TFEB-depleted cells cause increased expression of plasma membrane VEGFR2, but in a manner associated with low signaling strength. An endothelium-specific Tfeb-knockout mouse model displays defects in fetal and newborn mouse vasculature caused by reduced endothelial proliferation and by anomalous function of the VEGFR2 pathway. These previously unrecognized functions of TFEB expand its role beyond regulation of the autophagic pathway in the vascular system.〈/p〉
    Print ISSN: 0261-4189
    Electronic ISSN: 1460-2075
    Topics: Biology , Medicine
    Published by Springer Nature on behalf of The European Molecular Biology Organization (EMBO).
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  • 3
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    Structure of HCMV glycoprotein B in the postfusion conformation bound to a neutralizing human antibody (2015)
    Springer Nature
    Details
    Publication Date: 2015-09-16
    Description: Article Cytomegalovirus is a danger to individuals with compromised immune systems and neonates infected in utero . Here the authors show the structure of a neutralizing antibody-bound viral fusion protein glycoprotein B, supporting the development of therapeutic antibodies and vaccines. Nature Communications doi: 10.1038/ncomms9176 Authors: Sumana Chandramouli, Claudio Ciferri, Pavel A. Nikitin, Stefano Caló, Rachel Gerrein, Kara Balabanis, James Monroe, Christy Hebner, Anders E. Lilja, Ethan C. Settembre, Andrea Carfi
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Published by Springer Nature
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  • 4
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    Structure of rotavirus outer-layer protein VP7 bound with a neutralizing Fab (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-06-13
    Description: Rotavirus outer-layer protein VP7 is a principal target of protective antibodies. Removal of free calcium ions (Ca2+) dissociates VP7 trimers into monomers, releasing VP7 from the virion, and initiates penetration-inducing conformational changes in the other outer-layer protein, VP4. We report the crystal structure at 3.4 angstrom resolution of VP7 bound with the Fab fragment of a neutralizing monoclonal antibody. The Fab binds across the outer surface of the intersubunit contact, which contains two Ca2+ sites. Mutations that escape neutralization by other antibodies suggest that the same region bears the epitopes of most neutralizing antibodies. The monovalent Fab is sufficient to neutralize infectivity. We propose that neutralizing antibodies against VP7 act by stabilizing the trimer, thereby inhibiting the uncoating trigger for VP4 rearrangement. A disulfide-linked trimer is a potential subunit immunogen.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2995306/" 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/PMC2995306/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aoki, Scott T -- Settembre, Ethan C -- Trask, Shane D -- Greenberg, Harry B -- Harrison, Stephen C -- Dormitzer, Philip R -- AI-21362/AI/NIAID NIH HHS/ -- CA-13202/CA/NCI NIH HHS/ -- DK-56339/DK/NIDDK NIH HHS/ -- R37 CA013202/CA/NCI NIH HHS/ -- R37 CA013202-38/CA/NCI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2009 Jun 12;324(5933):1444-7. doi: 10.1126/science.1170481.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Medicine, Children's Hospital, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19520960" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Antibodies, Monoclonal/chemistry/immunology/metabolism ; Antibodies, Viral/chemistry/*immunology/metabolism ; Antigens, Viral/*chemistry/genetics/*immunology/metabolism ; Binding Sites ; Binding Sites, Antibody ; Calcium/metabolism ; Capsid Proteins/*chemistry/genetics/*immunology/metabolism ; Crystallography, X-Ray ; Epitopes/immunology ; Immunoglobulin Fab Fragments/chemistry/*immunology/metabolism ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Neutralization Tests ; Protein Folding ; Protein Multimerization ; Protein Structure, Tertiary ; Protein Subunits ; Recombinant Proteins/chemistry ; Rotavirus/*chemistry/immunology ; Serotyping
    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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    Cell metabolism: autophagy transcribed (2014)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2014-11-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Settembre, Carmine -- Ballabio, Andrea -- England -- Nature. 2014 Dec 4;516(7529):40-1. doi: 10.1038/nature13939. Epub 2014 Nov 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Telethon Institute of Genetics and Medicine, Naples 80078, Italy; in the Department of Translational Medicine, Federico II University, Naples; and in the Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25383529" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autophagy/*genetics ; Cyclic AMP Response Element-Binding Protein/metabolism ; Fatty Acids/metabolism ; *Gene Expression Regulation ; Liver/cytology/*metabolism ; PPAR alpha/metabolism ; Promoter Regions, Genetic ; Protein Binding ; Receptors, Cytoplasmic and Nuclear/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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  • 6
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    FGF signalling regulates bone growth through autophagy (2015)
    Nature Publishing Group (NPG)
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    Publication Date: 2015-11-26
    Description: Skeletal growth relies on both biosynthetic and catabolic processes. While the role of the former is clearly established, how the latter contributes to growth-promoting pathways is less understood. Macroautophagy, hereafter referred to as autophagy, is a catabolic process that plays a fundamental part in tissue homeostasis. We investigated the role of autophagy during bone growth, which is mediated by chondrocyte rate of proliferation, hypertrophic differentiation and extracellular matrix (ECM) deposition in growth plates. Here we show that autophagy is induced in growth-plate chondrocytes during post-natal development and regulates the secretion of type II collagen (Col2), the major component of cartilage ECM. Mice lacking the autophagy related gene 7 (Atg7) in chondrocytes experience endoplasmic reticulum storage of type II procollagen (PC2) and defective formation of the Col2 fibrillary network in the ECM. Surprisingly, post-natal induction of chondrocyte autophagy is mediated by the growth factor FGF18 through FGFR4 and JNK-dependent activation of the autophagy initiation complex VPS34-beclin-1. Autophagy is completely suppressed in growth plates from Fgf18(-/-) embryos, while Fgf18(+/-) heterozygous and Fgfr4(-/-) mice fail to induce autophagy during post-natal development and show decreased Col2 levels in the growth plate. Strikingly, the Fgf18(+/-) and Fgfr4(-/-) phenotypes can be rescued in vivo by pharmacological activation of autophagy, pointing to autophagy as a novel effector of FGF signalling in bone. These data demonstrate that autophagy is a developmentally regulated process necessary for bone growth, and identify FGF signalling as a crucial regulator of autophagy in chondrocytes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cinque, Laura -- Forrester, Alison -- Bartolomeo, Rosa -- Svelto, Maria -- Venditti, Rossella -- Montefusco, Sandro -- Polishchuk, Elena -- Nusco, Edoardo -- Rossi, Antonio -- Medina, Diego L -- Polishchuk, Roman -- De Matteis, Maria Antonietta -- Settembre, Carmine -- England -- Nature. 2015 Dec 10;528(7581):272-5. doi: 10.1038/nature16063. Epub 2015 Nov 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Telethon Institute of Genetics and Medicine (TIGEM), Via Campi Flegrei, 34, 80078 Pozzuoli (NA), Italy. ; Dulbecco Telethon Institute, Via Campi Flegrei, 34, 80078 Pozzuoli (NA), Italy. ; Medical Genetics Unit, Department of Medical and Translational Science, Federico II University, Via Pansini 5, 80131 Naples, Italy. ; Department of Molecular Medicine, Biochemistry Unit, University of Pavia, 27100 Pavia, Italy.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26595272" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autophagy/genetics/*physiology ; Bone Development/genetics/*physiology ; Cell Differentiation ; Cell Proliferation ; Cells, Cultured ; Chondrocytes/cytology/metabolism ; Collagen Type II/secretion ; Embryo, Mammalian ; Extracellular Matrix/genetics ; Fibroblast Growth Factors/*genetics/metabolism ; Growth Plate/cytology/metabolism ; MAP Kinase Signaling System ; Mice ; Microtubule-Associated Proteins/genetics/metabolism ; Receptor, Fibroblast Growth Factor, Type 4/genetics/metabolism ; *Signal Transduction
    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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    TFEB links autophagy to lysosomal biogenesis (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-05-28
    Description: Autophagy is a cellular catabolic process that relies on the cooperation of autophagosomes and lysosomes. During starvation, the cell expands both compartments to enhance degradation processes. We found that starvation activates a transcriptional program that controls major steps of the autophagic pathway, including autophagosome formation, autophagosome-lysosome fusion, and substrate degradation. The transcription factor EB (TFEB), a master gene for lysosomal biogenesis, coordinated this program by driving expression of autophagy and lysosomal genes. Nuclear localization and activity of TFEB were regulated by serine phosphorylation mediated by the extracellular signal-regulated kinase 2, whose activity was tuned by the levels of extracellular nutrients. Thus, a mitogen-activated protein kinase-dependent mechanism regulates autophagy by controlling the biogenesis and partnership of two distinct cellular organelles.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3638014/" 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/PMC3638014/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Settembre, Carmine -- Di Malta, Chiara -- Polito, Vinicia Assunta -- Garcia Arencibia, Moises -- Vetrini, Francesco -- Erdin, Serkan -- Erdin, Serpil Uckac -- Huynh, Tuong -- Medina, Diego -- Colella, Pasqualina -- Sardiello, Marco -- Rubinsztein, David C -- Ballabio, Andrea -- 250154/European Research Council/International -- 5 P30 HD024064/HD/NICHD NIH HHS/ -- G0600194/Medical Research Council/United Kingdom -- P30 HD024064/HD/NICHD NIH HHS/ -- R01 NS078072/NS/NINDS NIH HHS/ -- TGM11CB6/Telethon/Italy -- Medical Research Council/United Kingdom -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2011 Jun 17;332(6036):1429-33. doi: 10.1126/science.1204592. Epub 2011 May 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Telethon Institute of Genetics and Medicine (TIGEM), Via Pietro Castellino 111, 80131 Naples, Italy.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21617040" target="_blank"〉PubMed〈/a〉
    Keywords: Active Transport, Cell Nucleus ; Animals ; *Autophagy ; Basic Helix-Loop-Helix Leucine Zipper Transcription Factors/genetics/*metabolism ; COS Cells ; Cell Nucleus/*metabolism ; Cells, Cultured ; Cercopithecus aethiops ; Cytoplasm/metabolism ; Gene Expression Regulation ; HeLa Cells ; Humans ; Liver/metabolism ; Lysosomes/*metabolism ; MAP Kinase Signaling System ; Mice ; Mice, Transgenic ; Microtubule-Associated Proteins/metabolism ; Mitogen-Activated Protein Kinase 1/metabolism ; Phagosomes/metabolism ; Phosphorylation ; RNA Interference ; Transcription, Genetic ; Up-Regulation
    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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    Insulin granules. Insulin secretory granules control autophagy in pancreatic beta cells (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-02-24
    Description: Pancreatic beta cells lower insulin release in response to nutrient depletion. The question of whether starved beta cells induce macroautophagy, a predominant mechanism maintaining energy homeostasis, remains poorly explored. We found that, in contrast to many mammalian cells, macroautophagy in pancreatic beta cells was suppressed upon starvation. Instead, starved beta cells induced lysosomal degradation of nascent secretory insulin granules, which was controlled by protein kinase D (PKD), a key player in secretory granule biogenesis. Starvation-induced nascent granule degradation triggered lysosomal recruitment and activation of mechanistic target of rapamycin that suppressed macroautophagy. Switching from macroautophagy to insulin granule degradation was important to keep insulin secretion low upon fasting. Thus, beta cells use a PKD-dependent mechanism to adapt to nutrient availability and couple autophagy flux to secretory function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goginashvili, Alexander -- Zhang, Zhirong -- Erbs, Eric -- Spiegelhalter, Coralie -- Kessler, Pascal -- Mihlan, Michael -- Pasquier, Adrien -- Krupina, Ksenia -- Schieber, Nicole -- Cinque, Laura -- Morvan, Joelle -- Sumara, Izabela -- Schwab, Yannick -- Settembre, Carmine -- Ricci, Romeo -- New York, N.Y. -- Science. 2015 Feb 20;347(6224):878-82. doi: 10.1126/science.aaa2628.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut de Genetique et de Biologie Moleculaire et Cellulaire (IGBMC), INSERM, CNRS, Universite de Strasbourg, 67404 Illkirch, France. ; Cell Biology and Biophysics Unit, European Molecular Biology Laboratory (EMBL), 69117 Heidelberg, Germany. ; Dulbecco Telethon Institute and Telethon Institute of Genetics and Medicine (TIGEM), 80131 Naples, Italy. ; Dulbecco Telethon Institute and Telethon Institute of Genetics and Medicine (TIGEM), 80131 Naples, Italy. Medical Genetics, Department of Medical and Translational Science Unit, Federico II University, Via Pansini 5, 80131 Naples, Italy. ; Institut de Genetique et de Biologie Moleculaire et Cellulaire (IGBMC), INSERM, CNRS, Universite de Strasbourg, 67404 Illkirch, France. Nouvel Hopital Civil, Laboratoire de Biochimie et de Biologie Moleculaire, Universite de Strasbourg, 67091 Strasbourg, France. romeo.ricci@igbmc.fr.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25700520" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Autophagy ; Cells, Cultured ; Fasting ; Humans ; Insulin/*secretion ; Insulin-Secreting Cells/*physiology/secretion/ultrastructure ; Mice ; Mice, Mutant Strains ; Mice, Transgenic ; Mitogen-Activated Protein Kinase 13/genetics ; Protein Kinase C/physiology ; Secretory Vesicles/*physiology/secretion
    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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  • 9
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    Conserved epitope on influenza-virus hemagglutinin head defined by a vaccine-induced antibody [Immunology and Inflammation] (2018)
    National Academy of Sciences
    Details
    Publication Date: 2018-01-03
    Description: Circulating influenza viruses evade neutralization in their human hosts by acquiring escape mutations at epitopes of prevalent antibodies. A goal for next-generation influenza vaccines is to reduce escape likelihood by selectively eliciting antibodies recognizing conserved surfaces on the viral hemagglutinin (HA). The receptor-binding site (RBS) on the HA “head” and...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 10
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    Astrocyte dysfunction triggers neurodegeneration in a lysosomal storage disorder (2012)
    National Academy of Sciences
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    Publication Date: 2012-07-23
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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