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  • 1
    Publication Date: 2014-11-05
    Description: Genome-wide association studies have identified loci underlying human diseases, but the causal nucleotide changes and mechanisms remain largely unknown. Here we developed a fine-mapping algorithm to identify candidate causal variants for 21 autoimmune diseases from genotyping data. We integrated these predictions with transcription and cis-regulatory element annotations, derived by mapping RNA and chromatin in primary immune cells, including resting and stimulated CD4(+) T-cell subsets, regulatory T cells, CD8(+) T cells, B cells, and monocytes. We find that approximately 90% of causal variants are non-coding, with approximately 60% mapping to immune-cell enhancers, many of which gain histone acetylation and transcribe enhancer-associated RNA upon immune stimulation. Causal variants tend to occur near binding sites for master regulators of immune differentiation and stimulus-dependent gene activation, but only 10-20% directly alter recognizable transcription factor binding motifs. Rather, most non-coding risk variants, including those that alter gene expression, affect non-canonical sequence determinants not well-explained by current gene regulatory models.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4336207/" 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/PMC4336207/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Farh, Kyle Kai-How -- Marson, Alexander -- Zhu, Jiang -- Kleinewietfeld, Markus -- Housley, William J -- Beik, Samantha -- Shoresh, Noam -- Whitton, Holly -- Ryan, Russell J H -- Shishkin, Alexander A -- Hatan, Meital -- Carrasco-Alfonso, Marlene J -- Mayer, Dita -- Luckey, C John -- Patsopoulos, Nikolaos A -- De Jager, Philip L -- Kuchroo, Vijay K -- Epstein, Charles B -- Daly, Mark J -- Hafler, David A -- Bernstein, Bradley E -- 12-0089/Worldwide Cancer Research/United Kingdom -- AI039671/AI/NIAID NIH HHS/ -- AI045757/AI/NIAID NIH HHS/ -- AI046130/AI/NIAID NIH HHS/ -- AI070352/AI/NIAID NIH HHS/ -- ES017155/ES/NIEHS NIH HHS/ -- GM093080/GM/NIGMS NIH HHS/ -- HG004570/HG/NHGRI NIH HHS/ -- NS067305/NS/NINDS NIH HHS/ -- NS24247/NS/NINDS NIH HHS/ -- P01 AI039671/AI/NIAID NIH HHS/ -- P01 AI045757/AI/NIAID NIH HHS/ -- P30 DK063720/DK/NIDDK NIH HHS/ -- R01 NS024247/NS/NINDS NIH HHS/ -- R37 NS024247/NS/NINDS NIH HHS/ -- T32 GM007748/GM/NIGMS NIH HHS/ -- U01 ES017155/ES/NIEHS NIH HHS/ -- U19 AI046130/AI/NIAID NIH HHS/ -- U19 AI070352/AI/NIAID NIH HHS/ -- U54 HG004570/HG/NHGRI NIH HHS/ -- U54 HG006991/HG/NHGRI NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Feb 19;518(7539):337-43. doi: 10.1038/nature13835. Epub 2014 Oct 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA [2] Analytical and Translational Genetics Unit, Massachusetts General Hospital, Boston, Massachusetts 02114, USA. ; Diabetes Center and Division of Infectious Diseases, Department of Medicine, University of California, San Francisco, California 94143, USA. ; 1] Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA [2] Howard Hughes Medical Institute, Chevy Chase, Maryland 20815, USA [3] Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA [4] Center for Systems Biology and Center for Cancer Research, Massachusetts General Hospital, Boston, Massachusetts 02114, USA. ; 1] Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA [2] Departments of Neurology and Immunobiology, Yale School of Medicine, New Haven, Connecticut 06511, USA. ; Departments of Neurology and Immunobiology, Yale School of Medicine, New Haven, Connecticut 06511, USA. ; Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA. ; 1] Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA [2] Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA. ; 1] Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA [2] California Institute of Technology, 1200 E California Boulevard, Pasadena, California 91125, USA. ; Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA. ; 1] Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA [2] Program in Translational NeuroPsychiatric Genomics, Institute for the Neurosciences, Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02142, USA [3] Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02142, USA. ; Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02142, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25363779" target="_blank"〉PubMed〈/a〉
    Keywords: Autoimmune Diseases/*genetics/immunology/pathology ; Base Sequence ; Chromatin/genetics ; Consensus Sequence/genetics ; Enhancer Elements, Genetic/genetics ; Epigenesis, Genetic/*genetics ; Epigenomics ; Genome-Wide Association Study ; Humans ; Nucleotide Motifs ; Organ Specificity ; Polymorphism, Single Nucleotide/*genetics ; T-Lymphocytes/immunology/metabolism ; Transcription Factors/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2012-05-25
    Description: An outstanding question is how cells control the number and size of membrane organelles. The small GTPase Rab5 has been proposed to be a master regulator of endosome biogenesis. Here, to test this hypothesis, we developed a mathematical model of endosome dependency on Rab5 and validated it by titrating down all three Rab5 isoforms in adult mouse liver using state-of-the-art RNA interference technology. Unexpectedly, the endocytic system was resilient to depletion of Rab5 and collapsed only when Rab5 decreased to a critical level. Loss of Rab5 below this threshold caused a marked reduction in the number of early endosomes, late endosomes and lysosomes, associated with a block of low-density lipoprotein endocytosis. Loss of endosomes caused failure to deliver apical proteins to the bile canaliculi, suggesting a requirement for polarized cargo sorting. Our results demonstrate for the first time, to our knowledge, the role of Rab5 as an endosome organizer in vivo and reveal the resilience mechanisms of the endocytic system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zeigerer, Anja -- Gilleron, Jerome -- Bogorad, Roman L -- Marsico, Giovanni -- Nonaka, Hidenori -- Seifert, Sarah -- Epstein-Barash, Hila -- Kuchimanchi, Satya -- Peng, Chang Geng -- Ruda, Vera M -- Del Conte-Zerial, Perla -- Hengstler, Jan G -- Kalaidzidis, Yannis -- Koteliansky, Victor -- Zerial, Marino -- England -- Nature. 2012 May 23;485(7399):465-70. doi: 10.1038/nature11133.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22622570" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Polarity ; Cells, Cultured ; Endocytosis ; Endosomes/*metabolism ; Gene Knockdown Techniques ; Hepatocytes/cytology/metabolism ; Isoenzymes/biosynthesis/deficiency/genetics/metabolism ; Lipoproteins, LDL/metabolism ; Liver/cytology/enzymology/metabolism ; Lysosomes/*metabolism ; Mice ; Multivesicular Bodies/metabolism ; Organ Specificity ; Protein Biosynthesis ; RNA Interference ; RNA, Messenger/analysis/genetics ; Time Factors ; Vesicular Transport Proteins/metabolism ; rab5 GTP-Binding Proteins/biosynthesis/deficiency/genetics/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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