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  • 1
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    The growth factor progranulin binds to TNF receptors and is therapeutic against inflammatory arthritis in mice (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-03-12
    Description: The growth factor progranulin (PGRN) has been implicated in embryonic development, tissue repair, tumorigenesis, and inflammation, but its receptors remain unidentified. We report that PGRN bound directly to tumor necrosis factor receptors (TNFRs) and disturbed the TNFalpha-TNFR interaction. PGRN-deficient mice were susceptible to collagen-induced arthritis, and administration of PGRN reversed inflammatory arthritis. Atsttrin, an engineered protein composed of three PGRN fragments, exhibited selective TNFR binding. PGRN and Atsttrin prevented inflammation in multiple arthritis mouse models and inhibited TNFalpha-activated intracellular signaling. Collectively, these findings demonstrate that PGRN is a ligand of TNFR, an antagonist of TNFalpha signaling, and plays a critical role in the pathogenesis of inflammatory arthritis in mice. They also suggest new potential therapeutic interventions for various TNFalpha-mediated pathologies and conditions, including rheumatoid arthritis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3104397/" 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/PMC3104397/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tang, Wei -- Lu, Yi -- Tian, Qing-Yun -- Zhang, Yan -- Guo, Feng-Jin -- Liu, Guang-Yi -- Syed, Nabeel Muzaffar -- Lai, Yongjie -- Lin, Edward Alan -- Kong, Li -- Su, Jeffrey -- Yin, Fangfang -- Ding, Ai-Hao -- Zanin-Zhorov, Alexandra -- Dustin, Michael L -- Tao, Jian -- Craft, Joseph -- Yin, Zhinan -- Feng, Jian Q -- Abramson, Steven B -- Yu, Xiu-Ping -- Liu, Chuan-ju -- AI43542/AI/NIAID NIH HHS/ -- AR040072/AR/NIAMS NIH HHS/ -- AR050620/AR/NIAMS NIH HHS/ -- AR053210/AR/NIAMS NIH HHS/ -- GM061710/GM/NIGMS NIH HHS/ -- R01 AI030165/AI/NIAID NIH HHS/ -- R01 AI030165-20/AI/NIAID NIH HHS/ -- R01 GM061710/GM/NIGMS NIH HHS/ -- R01 GM061710-08/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2011 Apr 22;332(6028):478-84. doi: 10.1126/science.1199214. Epub 2011 Mar 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Orthopaedic Surgery, New York University School of Medicine and NYU Hospital for Joint Diseases, New York, NY 10003, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21393509" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Aged ; Animals ; Anti-Inflammatory Agents, Non-Steroidal/metabolism/pharmacology/therapeutic use ; Arthritis, Experimental/*drug therapy/*immunology/pathology/physiopathology ; Cartilage, Articular/metabolism/pathology ; Female ; Humans ; Intercellular Signaling Peptides and ; Proteins/chemistry/genetics/*metabolism/therapeutic use ; Ligands ; Male ; Mice ; Mice, Inbred Strains ; Mice, Knockout ; Mice, Transgenic ; Middle Aged ; Protein Interaction Domains and Motifs ; Receptors, Tumor Necrosis Factor, Type I/genetics/*metabolism ; Receptors, Tumor Necrosis Factor, Type II/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism/pharmacology/therapeutic use ; Recombinant Proteins/therapeutic use ; Signal Transduction ; T-Lymphocytes, Regulatory/immunology/physiology ; Tumor Necrosis Factor-alpha/*metabolism ; Young Adult
    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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  • 2
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    TAZ, a transcriptional modulator of mesenchymal stem cell differentiation (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-08-16
    Description: Mesenchymal stem cells (MSCs) are a pluripotent cell type that can differentiate into several distinct lineages. Two key transcription factors, Runx2 and peroxisome proliferator-activated receptor gamma (PPARgamma), drive MSCs to differentiate into either osteoblasts or adipocytes, respectively. How these two transcription factors are regulated in order to specify these alternate cell fates remains a pivotal question. Here we report that a 14-3-3-binding protein, TAZ (transcriptional coactivator with PDZ-binding motif), coactivates Runx2-dependent gene transcription while repressing PPARgamma-dependent gene transcription. By modulating TAZ expression in model cell lines, mouse embryonic fibroblasts, and primary MSCs in culture and in zebrafish in vivo, we observed alterations in osteogenic versus adipogenic potential. These results indicate that TAZ functions as a molecular rheostat that modulates MSC differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hong, Jeong-Ho -- Hwang, Eun Sook -- McManus, Michael T -- Amsterdam, Adam -- Tian, Yu -- Kalmukova, Ralitsa -- Mueller, Elisabetta -- Benjamin, Thomas -- Spiegelman, Bruce M -- Sharp, Phillip A -- Hopkins, Nancy -- Yaffe, Michael B -- CA042063/CA/NCI NIH HHS/ -- GM60594/GM/NIGMS NIH HHS/ -- GM68762/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2005 Aug 12;309(5737):1074-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Cancer Research, Department of Biology, Massachusetts Institute of Technology, 77 Massachusetts Avenue, E18-580, Cambridge, MA 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16099986" target="_blank"〉PubMed〈/a〉
    Keywords: Adipocytes/*cytology ; Animals ; Bone Morphogenetic Protein 2 ; Bone Morphogenetic Proteins/pharmacology ; Cell Differentiation ; Cell Line ; Core Binding Factor Alpha 1 Subunit ; Gene Expression Regulation, Developmental ; Humans ; Mesenchymal Stromal Cells/*cytology/physiology ; Mice ; Neoplasm Proteins/metabolism ; Oligonucleotides, Antisense ; Osteoblasts/*cytology ; Osteocalcin/genetics ; Osteogenesis ; PPAR gamma/metabolism ; Promoter Regions, Genetic ; Protein Structure, Tertiary ; Proteins/chemistry/genetics/*physiology ; RNA, Small Interfering ; Transcription Factors/chemistry/genetics/metabolism/*physiology ; Transcriptional Activation ; Transfection ; Transforming Growth Factor beta/pharmacology ; Zebrafish ; Zebrafish Proteins/genetics/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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  • 3
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    Dicer recognizes the 5' end of RNA for efficient and accurate processing (2011)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2011-07-15
    Description: A hallmark of RNA silencing is a class of approximately 22-nucleotide RNAs that are processed from double-stranded RNA precursors by Dicer. Accurate processing by Dicer is crucial for the functionality of microRNAs (miRNAs). The current model posits that Dicer selects cleavage sites by measuring a set distance from the 3' overhang of the double-stranded RNA terminus. Here we report that human Dicer anchors not only the 3' end but also the 5' end, with the cleavage site determined mainly by the distance ( approximately 22 nucleotides) from the 5' end (5' counting rule). This cleavage requires a 5'-terminal phosphate group. Further, we identify a novel basic motif (5' pocket) in human Dicer that recognizes the 5'-phosphorylated end. The 5' counting rule and the 5' anchoring residues are conserved in Drosophila Dicer-1, but not in Giardia Dicer. Mutations in the 5' pocket reduce processing efficiency and alter cleavage sites in vitro. Consistently, miRNA biogenesis is perturbed in vivo when Dicer-null embryonic stem cells are replenished with the 5'-pocket mutant. Thus, 5'-end recognition by Dicer is important for precise and effective biogenesis of miRNAs. Insights from this study should also afford practical benefits to the design of small hairpin RNAs.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4693635/" 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/PMC4693635/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Park, Jong-Eun -- Heo, Inha -- Tian, Yuan -- Simanshu, Dhirendra K -- Chang, Hyeshik -- Jee, David -- Patel, Dinshaw J -- Kim, V Narry -- P30 CA008748/CA/NCI NIH HHS/ -- R01 AI068776/AI/NIAID NIH HHS/ -- England -- Nature. 2011 Jul 13;475(7355):201-5. doi: 10.1038/nature10198.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Biological Sciences, Seoul National University, Seoul 151-742, Korea.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21753850" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Binding Sites/genetics ; DEAD-box RNA Helicases/deficiency/genetics/*metabolism ; Drosophila Proteins/metabolism ; Embryonic Stem Cells/metabolism ; Evolution, Molecular ; Giardia/enzymology ; HEK293 Cells ; Humans ; MicroRNAs/biosynthesis/chemistry/genetics/*metabolism ; Molecular Sequence Data ; Mutant Proteins/chemistry/genetics/metabolism ; Mutation/genetics ; Phosphates/metabolism ; Phosphorylation ; RNA Helicases/metabolism ; Ribonuclease III/deficiency/genetics/*metabolism ; Substrate Specificity/genetics
    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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  • 4
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    Structure of the chemokine receptor CXCR1 in phospholipid bilayers (2012)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2012-10-23
    Description: CXCR1 is one of two high-affinity receptors for the CXC chemokine interleukin-8 (IL-8), a major mediator of immune and inflammatory responses implicated in many disorders, including tumour growth. IL-8, released in response to inflammatory stimuli, binds to the extracellular side of CXCR1. The ligand-activated intracellular signalling pathways result in neutrophil migration to the site of inflammation. CXCR1 is a class A, rhodopsin-like G-protein-coupled receptor (GPCR), the largest class of integral membrane proteins responsible for cellular signal transduction and targeted as drug receptors. Despite its importance, the molecular mechanism of CXCR1 signal transduction is poorly understood owing to the limited structural information available. Recent structural determination of GPCRs has advanced by modifying the receptors with stabilizing mutations, insertion of the protein T4 lysozyme and truncations of their amino acid sequences, as well as addition of stabilizing antibodies and small molecules that facilitate crystallization in cubic phase monoolein mixtures. The intracellular loops of GPCRs are crucial for G-protein interactions, and activation of CXCR1 involves both amino-terminal residues and extracellular loops. Our previous nuclear magnetic resonance studies indicate that IL-8 binding to the N-terminal residues is mediated by the membrane, underscoring the importance of the phospholipid bilayer for physiological activity. Here we report the three-dimensional structure of human CXCR1 determined by NMR spectroscopy. The receptor is in liquid crystalline phospholipid bilayers, without modification of its amino acid sequence and under physiological conditions. Features important for intracellular G-protein activation and signal transduction are revealed. The structure of human CXCR1 in a lipid bilayer should help to facilitate the discovery of new compounds that interact with GPCRs and combat diseases such as breast cancer.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3700570/" 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/PMC3700570/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Park, Sang Ho -- Das, Bibhuti B -- Casagrande, Fabio -- Tian, Ye -- Nothnagel, Henry J -- Chu, Mignon -- Kiefer, Hans -- Maier, Klaus -- De Angelis, Anna A -- Marassi, Francesca M -- Opella, Stanley J -- P01 AI074805/AI/NIAID NIH HHS/ -- P01AI074805/AI/NIAID NIH HHS/ -- P41 EB002031/EB/NIBIB NIH HHS/ -- P41EB002031/EB/NIBIB NIH HHS/ -- R01 EB005161/EB/NIBIB NIH HHS/ -- R01 GM099986/GM/NIGMS NIH HHS/ -- R01EB005161/EB/NIBIB NIH HHS/ -- R01GM075877/GM/NIGMS NIH HHS/ -- R21GM075917/GM/NIGMS NIH HHS/ -- R21GM94727/GM/NIGMS NIH HHS/ -- England -- Nature. 2012 Nov 29;491(7426):779-83. doi: 10.1038/nature11580. Epub 2012 Oct 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0307, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23086146" target="_blank"〉PubMed〈/a〉
    Keywords: Disulfides/chemistry/metabolism ; Enzyme Activation ; Heterotrimeric GTP-Binding Proteins/metabolism ; Humans ; Interleukin-8/chemistry/metabolism ; Lipid Bilayers/chemistry/*metabolism ; Models, Molecular ; Molecular Conformation ; Nuclear Magnetic Resonance, Biomolecular ; Phospholipids/chemistry/*metabolism ; Receptors, Interleukin-8A/*chemistry/*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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  • 5
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    Transcriptomic analysis of autistic brain reveals convergent molecular pathology (2011)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2011-05-27
    Description: Autism spectrum disorder (ASD) is a common, highly heritable neurodevelopmental condition characterized by marked genetic heterogeneity. Thus, a fundamental question is whether autism represents an aetiologically heterogeneous disorder in which the myriad genetic or environmental risk factors perturb common underlying molecular pathways in the brain. Here, we demonstrate consistent differences in transcriptome organization between autistic and normal brain by gene co-expression network analysis. Remarkably, regional patterns of gene expression that typically distinguish frontal and temporal cortex are significantly attenuated in the ASD brain, suggesting abnormalities in cortical patterning. We further identify discrete modules of co-expressed genes associated with autism: a neuronal module enriched for known autism susceptibility genes, including the neuronal specific splicing factor A2BP1 (also known as FOX1), and a module enriched for immune genes and glial markers. Using high-throughput RNA sequencing we demonstrate dysregulated splicing of A2BP1-dependent alternative exons in the ASD brain. Moreover, using a published autism genome-wide association study (GWAS) data set, we show that the neuronal module is enriched for genetically associated variants, providing independent support for the causal involvement of these genes in autism. In contrast, the immune-glial module showed no enrichment for autism GWAS signals, indicating a non-genetic aetiology for this process. Collectively, our results provide strong evidence for convergent molecular abnormalities in ASD, and implicate transcriptional and splicing dysregulation as underlying mechanisms of neuronal dysfunction in this disorder.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3607626/" 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/PMC3607626/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Voineagu, Irina -- Wang, Xinchen -- Johnston, Patrick -- Lowe, Jennifer K -- Tian, Yuan -- Horvath, Steve -- Mill, Jonathan -- Cantor, Rita M -- Blencowe, Benjamin J -- Geschwind, Daniel H -- 5R01MH081754-03/MH/NIMH NIH HHS/ -- R01 MH081754/MH/NIMH NIH HHS/ -- R01 MH081754-01/MH/NIMH NIH HHS/ -- R01 MH081754-02/MH/NIMH NIH HHS/ -- R01 MH081754-03/MH/NIMH NIH HHS/ -- R01 MH081754-04/MH/NIMH NIH HHS/ -- R01 MH081754-05/MH/NIMH NIH HHS/ -- R37 MH060233/MH/NIMH NIH HHS/ -- R37 MH060233-11/MH/NIMH NIH HHS/ -- R37 MH060233-12/MH/NIMH NIH HHS/ -- R37MH060233/MH/NIMH NIH HHS/ -- Canadian Institutes of Health Research/Canada -- England -- Nature. 2011 May 25;474(7351):380-4. doi: 10.1038/nature10110.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Neurogenetics and Neurobehavioral Genetics, Department of Neurology and Semel Institute, David Geffen School of Medicine, University of California, Los Angeles, California 90095-1769, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21614001" target="_blank"〉PubMed〈/a〉
    Keywords: Alternative Splicing/genetics ; Autistic Disorder/*genetics/*pathology/physiopathology ; Brain/*metabolism/*pathology/physiopathology ; Case-Control Studies ; Exons/genetics ; Frontal Lobe/metabolism/pathology/physiopathology ; *Gene Expression Profiling ; Gene Expression Regulation/*genetics ; Genome-Wide Association Study ; Humans ; Oligonucleotide Array Sequence Analysis ; RNA-Binding Proteins/genetics ; Temporal Lobe/metabolism/pathology/physiopathology ; Transcription, Genetic/genetics
    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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