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  • Mice  (105)
  • 2005-2009  (105)
  • 2008  (105)
  • 1
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    Substrate-targeting gamma-secretase modulators (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-06-13
    Description: Selective lowering of Abeta42 levels (the 42-residue isoform of the amyloid-beta peptide) with small-molecule gamma-secretase modulators (GSMs), such as some non-steroidal anti-inflammatory drugs, is a promising therapeutic approach for Alzheimer's disease. To identify the target of these agents we developed biotinylated photoactivatable GSMs. GSM photoprobes did not label the core proteins of the gamma-secretase complex, but instead labelled the beta-amyloid precursor protein (APP), APP carboxy-terminal fragments and amyloid-beta peptide in human neuroglioma H4 cells. Substrate labelling was competed by other GSMs, and labelling of an APP gamma-secretase substrate was more efficient than a Notch substrate. GSM interaction was localized to residues 28-36 of amyloid-beta, a region critical for aggregation. We also demonstrate that compounds known to interact with this region of amyloid-beta act as GSMs, and some GSMs alter the production of cell-derived amyloid-beta oligomers. Furthermore, mutation of the GSM binding site in the APP alters the sensitivity of the substrate to GSMs. These findings indicate that substrate targeting by GSMs mechanistically links two therapeutic actions: alteration in Abeta42 production and inhibition of amyloid-beta aggregation, which may synergistically reduce amyloid-beta deposition in Alzheimer's disease. These data also demonstrate the existence and feasibility of 'substrate targeting' by small-molecule effectors of proteolytic enzymes, which if generally applicable may significantly broaden the current notion of 'druggable' targets.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2678541/" 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/PMC2678541/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kukar, Thomas L -- Ladd, Thomas B -- Bann, Maralyssa A -- Fraering, Patrick C -- Narlawar, Rajeshwar -- Maharvi, Ghulam M -- Healy, Brent -- Chapman, Robert -- Welzel, Alfred T -- Price, Robert W -- Moore, Brenda -- Rangachari, Vijayaraghavan -- Cusack, Bernadette -- Eriksen, Jason -- Jansen-West, Karen -- Verbeeck, Christophe -- Yager, Debra -- Eckman, Christopher -- Ye, Wenjuan -- Sagi, Sarah -- Cottrell, Barbara A -- Torpey, Justin -- Rosenberry, Terrone L -- Fauq, Abdul -- Wolfe, Michael S -- Schmidt, Boris -- Walsh, Dominic M -- Koo, Edward H -- Golde, Todd E -- P01 AG020206/AG/NIA NIH HHS/ -- P01 AG020206-010002/AG/NIA NIH HHS/ -- R01 AG017574/AG/NIA NIH HHS/ -- R01 AG017574-08/AG/NIA NIH HHS/ -- R01 AG017574-09/AG/NIA NIH HHS/ -- R01 NS041355/NS/NINDS NIH HHS/ -- R01 NS041355-06A2/NS/NINDS NIH HHS/ -- R01 NS041355-07/NS/NINDS NIH HHS/ -- England -- Nature. 2008 Jun 12;453(7197):925-9. doi: 10.1038/nature07055.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, Mayo Clinic, Mayo Clinic College of Medicine, 4500 San Pablo Road, Jacksonville, Florida 32224, USA. kukar.thomas@mayo.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18548070" target="_blank"〉PubMed〈/a〉
    Keywords: Alzheimer Disease/drug therapy/enzymology/metabolism ; Amyloid Precursor Protein Secretases/*antagonists & inhibitors/*metabolism ; Amyloid beta-Protein Precursor/antagonists & ; inhibitors/*chemistry/genetics/*metabolism ; Animals ; Anti-Inflammatory Agents, Non-Steroidal/chemistry/*metabolism/*pharmacology ; Binding Sites/drug effects ; CHO Cells ; Cell Line, Tumor ; Cricetinae ; Cricetulus ; Female ; Humans ; Mice ; Protein Binding/drug effects ; Receptors, Notch/genetics/metabolism ; Substrate Specificity/drug effects
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
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    DNA double-strand breaks activate a multi-functional genetic program in developing lymphocytes (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-10-14
    Description: DNA double-strand breaks are generated by genotoxic agents and by cellular endonucleases as intermediates of several important physiological processes. The cellular response to genotoxic DNA breaks includes the activation of transcriptional programs known primarily to regulate cell-cycle checkpoints and cell survival. DNA double-strand breaks are generated in all developing lymphocytes during the assembly of antigen receptor genes, a process that is essential for normal lymphocyte development. Here we show that in murine lymphocytes these physiological DNA breaks activate a broad transcriptional program. This program transcends the canonical DNA double-strand break response and includes many genes that regulate diverse cellular processes important for lymphocyte development. Moreover, the expression of several of these genes is regulated similarly in response to genotoxic DNA damage. Thus, physiological DNA double-strand breaks provide cues that can regulate cell-type-specific processes not directly involved in maintaining the integrity of the genome, and genotoxic DNA breaks could disrupt normal cellular functions by corrupting these processes.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2605662/" 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/PMC2605662/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bredemeyer, Andrea L -- Helmink, Beth A -- Innes, Cynthia L -- Calderon, Boris -- McGinnis, Lisa M -- Mahowald, Grace K -- Gapud, Eric J -- Walker, Laura M -- Collins, Jennifer B -- Weaver, Brian K -- Mandik-Nayak, Laura -- Schreiber, Robert D -- Allen, Paul M -- May, Michael J -- Paules, Richard S -- Bassing, Craig H -- Sleckman, Barry P -- R01 AI047829/AI/NIAID NIH HHS/ -- R01 AI047829-09/AI/NIAID NIH HHS/ -- R01 CA125195/CA/NCI NIH HHS/ -- R01 CA125195-02/CA/NCI NIH HHS/ -- England -- Nature. 2008 Dec 11;456(7223):819-23. doi: 10.1038/nature07392. Epub 2008 Oct 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18849970" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ataxia Telangiectasia Mutated Proteins ; B-Lymphocytes/drug effects/*metabolism ; Cell Cycle Proteins/drug effects ; Cell Line ; *DNA Breaks, Double-Stranded ; DNA-Binding Proteins/drug effects ; Enzyme Inhibitors/pharmacology ; Gene Expression Profiling ; Gene Expression Regulation, Developmental/drug effects/*genetics ; Homeodomain Proteins/metabolism ; Mice ; Mice, Knockout ; Mice, SCID ; NF-kappa B/metabolism ; Protein-Serine-Threonine Kinases/drug effects ; Tumor Suppressor Proteins/drug effects
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
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    Proteomic analysis of active multiple sclerosis lesions reveals therapeutic targets (2008)
    Nature Publishing Group (NPG)
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    Publication Date: 2008-02-19
    Description: Understanding the neuropathology of multiple sclerosis (MS) is essential for improved therapies. Therefore, identification of targets specific to pathological types of MS may have therapeutic benefits. Here we identify, by laser-capture microdissection and proteomics, proteins unique to three major types of MS lesions: acute plaque, chronic active plaque and chronic plaque. Comparative proteomic profiles identified tissue factor and protein C inhibitor within chronic active plaque samples, suggesting dysregulation of molecules associated with coagulation. In vivo administration of hirudin or recombinant activated protein C reduced disease severity in experimental autoimmune encephalomyelitis and suppressed Th1 and Th17 cytokines in astrocytes and immune cells. Administration of mutant forms of recombinant activated protein C showed that both its anticoagulant and its signalling functions were essential for optimal amelioration of experimental autoimmune encephalomyelitis. A proteomic approach illuminated potential therapeutic targets selective for specific pathological stages of MS and implicated participation of the coagulation cascade.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Han, May H -- Hwang, Sun-Il -- Roy, Dolly B -- Lundgren, Deborah H -- Price, Jordan V -- Ousman, Shalina S -- Fernald, Guy Haskin -- Gerlitz, Bruce -- Robinson, William H -- Baranzini, Sergio E -- Grinnell, Brian W -- Raine, Cedric S -- Sobel, Raymond A -- Han, David K -- Steinman, Lawrence -- T32 AI007290/AI/NIAID NIH HHS/ -- England -- Nature. 2008 Feb 28;451(7182):1076-81. doi: 10.1038/nature06559. Epub 2008 Feb 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18278032" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Animals ; Blood Coagulation ; Encephalomyelitis, Autoimmune, Experimental/immunology/metabolism/pathology ; Female ; *Gene Expression Profiling ; Humans ; Inflammation/metabolism/pathology ; Male ; Mice ; Middle Aged ; Multiple Sclerosis/classification/drug therapy/*metabolism/*pathology ; Protein C/genetics/metabolism/pharmacology ; *Proteomics ; Th1 Cells/immunology ; Th2 Cells/immunology ; Thrombin/antagonists & inhibitors/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 4
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    Genetics of gene expression and its effect on disease (2008)
    Nature Publishing Group (NPG)
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    Publication Date: 2008-03-18
    Description: Common human diseases result from the interplay of many genes and environmental factors. Therefore, a more integrative biology approach is needed to unravel the complexity and causes of such diseases. To elucidate the complexity of common human diseases such as obesity, we have analysed the expression of 23,720 transcripts in large population-based blood and adipose tissue cohorts comprehensively assessed for various phenotypes, including traits related to clinical obesity. In contrast to the blood expression profiles, we observed a marked correlation between gene expression in adipose tissue and obesity-related traits. Genome-wide linkage and association mapping revealed a highly significant genetic component to gene expression traits, including a strong genetic effect of proximal (cis) signals, with 50% of the cis signals overlapping between the two tissues profiled. Here we demonstrate an extensive transcriptional network constructed from the human adipose data that exhibits significant overlap with similar network modules constructed from mouse adipose data. A core network module in humans and mice was identified that is enriched for genes involved in the inflammatory and immune response and has been found to be causally associated to obesity-related traits.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Emilsson, Valur -- Thorleifsson, Gudmar -- Zhang, Bin -- Leonardson, Amy S -- Zink, Florian -- Zhu, Jun -- Carlson, Sonia -- Helgason, Agnar -- Walters, G Bragi -- Gunnarsdottir, Steinunn -- Mouy, Magali -- Steinthorsdottir, Valgerdur -- Eiriksdottir, Gudrun H -- Bjornsdottir, Gyda -- Reynisdottir, Inga -- Gudbjartsson, Daniel -- Helgadottir, Anna -- Jonasdottir, Aslaug -- Jonasdottir, Adalbjorg -- Styrkarsdottir, Unnur -- Gretarsdottir, Solveig -- Magnusson, Kristinn P -- Stefansson, Hreinn -- Fossdal, Ragnheidur -- Kristjansson, Kristleifur -- Gislason, Hjortur G -- Stefansson, Tryggvi -- Leifsson, Bjorn G -- Thorsteinsdottir, Unnur -- Lamb, John R -- Gulcher, Jeffrey R -- Reitman, Marc L -- Kong, Augustine -- Schadt, Eric E -- Stefansson, Kari -- England -- Nature. 2008 Mar 27;452(7186):423-8. doi: 10.1038/nature06758. Epub 2008 Mar 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉deCODE genetics, 101 Reykjavik, Iceland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18344981" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/metabolism ; Adolescent ; Adult ; Aged ; Aged, 80 and over ; Animals ; Blood/metabolism ; Body Mass Index ; Cohort Studies ; European Continental Ancestry Group/genetics ; Female ; *Gene Expression Profiling ; Gene Expression Regulation/*genetics ; Genome, Human ; Humans ; Iceland ; Lod Score ; Male ; Mice ; Middle Aged ; Obesity/*genetics ; Polymorphism, Single Nucleotide/genetics ; Quantitative Trait Loci/genetics ; Sample Size ; Waist-Hip Ratio
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 5
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    Pyogenic bacterial infections in humans with MyD88 deficiency (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-08-02
    Description: MyD88 is a key downstream adapter for most Toll-like receptors (TLRs) and interleukin-1 receptors (IL-1Rs). MyD88 deficiency in mice leads to susceptibility to a broad range of pathogens in experimental settings of infection. We describe a distinct situation in a natural setting of human infection. Nine children with autosomal recessive MyD88 deficiency suffered from life-threatening, often recurrent pyogenic bacterial infections, including invasive pneumococcal disease. However, these patients were otherwise healthy, with normal resistance to other microbes. Their clinical status improved with age, but not due to any cellular leakiness in MyD88 deficiency. The MyD88-dependent TLRs and IL-1Rs are therefore essential for protective immunity to a small number of pyogenic bacteria, but redundant for host defense to most natural infections.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2688396/" 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/PMC2688396/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉von Bernuth, Horst -- Picard, Capucine -- Jin, Zhongbo -- Pankla, Rungnapa -- Xiao, Hui -- Ku, Cheng-Lung -- Chrabieh, Maya -- Mustapha, Imen Ben -- Ghandil, Pegah -- Camcioglu, Yildiz -- Vasconcelos, Julia -- Sirvent, Nicolas -- Guedes, Margarida -- Vitor, Artur Bonito -- Herrero-Mata, Maria Jose -- Arostegui, Juan Ignacio -- Rodrigo, Carlos -- Alsina, Laia -- Ruiz-Ortiz, Estibaliz -- Juan, Manel -- Fortuny, Claudia -- Yague, Jordi -- Anton, Jordi -- Pascal, Mariona -- Chang, Huey-Hsuan -- Janniere, Lucile -- Rose, Yoann -- Garty, Ben-Zion -- Chapel, Helen -- Issekutz, Andrew -- Marodi, Laszlo -- Rodriguez-Gallego, Carlos -- Banchereau, Jacques -- Abel, Laurent -- Li, Xiaoxia -- Chaussabel, Damien -- Puel, Anne -- Casanova, Jean-Laurent -- U19 AI057234/AI/NIAID NIH HHS/ -- U19 AI057234-02/AI/NIAID NIH HHS/ -- U19 AIO57234-02/PHS HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2008 Aug 1;321(5889):691-6. doi: 10.1126/science.1158298.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Human Genetics of Infectious Diseases, INSERM U550, Paris, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18669862" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Animals ; Bacterial Infections/*genetics/*immunology ; Cell Line, Transformed ; Child ; Child, Preschool ; Cytokines/metabolism ; Disease Susceptibility ; Female ; Gene Deletion ; Humans ; Immunity, Innate ; Male ; Mice ; Mutation, Missense ; Myeloid Differentiation Factor 88/*deficiency/genetics/metabolism ; Pneumococcal Infections/genetics/immunology ; Pseudomonas Infections/genetics/immunology ; Receptors, Interleukin-1/immunology/metabolism ; Signal Transduction ; Staphylococcal Infections/genetics/immunology ; Toll-Like Receptors/immunology/metabolism ; Transfection
    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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  • 6
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    Absence of the SRC-2 coactivator results in a glycogenopathy resembling Von Gierke's disease (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-11-29
    Description: Hepatic glucose production is critical for basal brain function and survival when dietary glucose is unavailable. Glucose-6-phosphatase (G6Pase) is an essential, rate-limiting enzyme that serves as a terminal gatekeeper for hepatic glucose release into the plasma. Mutations in G6Pase result in Von Gierke's disease (glycogen storage disease-1a), a potentially fatal genetic disorder. We have identified the transcriptional coactivator SRC-2 as a regulator of fasting hepatic glucose release, a function that SRC-2 performs by controlling the expression of hepatic G6Pase. SRC-2 modulates G6Pase expression directly by acting as a coactivator with the orphan nuclear receptor RORalpha. In addition, SRC-2 ablation, in both a whole-body and liver-specific manner, resulted in a Von Gierke's disease phenotype in mice. Our results position SRC-2 as a critical regulator of mammalian glucose production.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2668604/" 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/PMC2668604/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chopra, Atul R -- Louet, Jean-Francois -- Saha, Pradip -- An, Jie -- Demayo, Franco -- Xu, Jianming -- York, Brian -- Karpen, Saul -- Finegold, Milton -- Moore, David -- Chan, Lawrence -- Newgard, Christopher B -- O'Malley, Bert W -- DK58242/DK/NIDDK NIH HHS/ -- HL51586/HL/NHLBI NIH HHS/ -- P01 DK059820/DK/NIDDK NIH HHS/ -- P01 DK059820-08/DK/NIDDK NIH HHS/ -- P01 DK58398/DK/NIDDK NIH HHS/ -- P01 DK59820/DK/NIDDK NIH HHS/ -- R01 DK056239/DK/NIDDK NIH HHS/ -- R01 DK056239-08/DK/NIDDK NIH HHS/ -- U19 DK062434/DK/NIDDK NIH HHS/ -- U19 DK062434-07/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2008 Nov 28;322(5906):1395-9. doi: 10.1126/science.1164847.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Biology, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19039140" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Fasting ; Female ; Gene Expression Profiling ; Gene Expression Regulation, Enzymologic ; Glucose/*metabolism ; Glucose-6-Phosphatase/*genetics/metabolism ; Glycogen Storage Disease Type I/*genetics/metabolism ; Hepatocytes/metabolism ; Kidney/metabolism ; Liver/*metabolism ; Liver Glycogen/metabolism ; Male ; Mice ; Mice, Knockout ; Nuclear Receptor Coactivator 2/genetics/*metabolism ; RNA Interference ; Receptors, Retinoic Acid/metabolism ; Response Elements ; Transcription, Genetic ; Triglycerides/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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  • 7
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    Batf3 deficiency reveals a critical role for CD8alpha+ dendritic cells in cytotoxic T cell immunity (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-11-15
    Description: Although in vitro observations suggest that cross-presentation of antigens is mediated primarily by CD8alpha+ dendritic cells, in vivo analysis has been hampered by the lack of systems that selectively eliminate this cell lineage. We show that deletion of the transcription factor Batf3 ablated development of CD8alpha+ dendritic cells, allowing us to examine their role in immunity in vivo. Dendritic cells from Batf3-/- mice were defective in cross-presentation, and Batf3-/- mice lacked virus-specific CD8+ T cell responses to West Nile virus. Importantly, rejection of highly immunogenic syngeneic tumors was impaired in Batf3-/- mice. These results suggest an important role for CD8alpha+ dendritic cells and cross-presentation in responses to viruses and in tumor rejection.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2756611/" 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/PMC2756611/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hildner, Kai -- Edelson, Brian T -- Purtha, Whitney E -- Diamond, Mark -- Matsushita, Hirokazu -- Kohyama, Masako -- Calderon, Boris -- Schraml, Barbara U -- Unanue, Emil R -- Diamond, Michael S -- Schreiber, Robert D -- Murphy, Theresa L -- Murphy, Kenneth M -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2008 Nov 14;322(5904):1097-100. doi: 10.1126/science.1164206.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology and Immunology, Washington University School of Medicine, 660 South Euclid Avenue, St. Louis, MO 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19008445" target="_blank"〉PubMed〈/a〉
    Keywords: Adoptive Transfer ; Animals ; Antibodies, Viral/blood ; Antigens, CD8/*analysis ; Basic-Leucine Zipper Transcription Factors/deficiency/genetics/*physiology ; CD4-Positive T-Lymphocytes/immunology ; *Cross-Priming ; *Cytotoxicity, Immunologic ; Dendritic Cells/*immunology/transplantation ; Female ; Fibrosarcoma/immunology ; Lymphocyte Activation ; Male ; Mice ; Mice, Inbred C57BL ; Repressor Proteins/genetics/*physiology ; Spleen/immunology ; T-Lymphocytes, Cytotoxic/*immunology ; West Nile Fever/immunology ; West Nile virus/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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  • 8
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    Genome-scale DNA methylation maps of pluripotent and differentiated cells (2008)
    Nature Publishing Group (NPG)
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    Publication Date: 2008-07-05
    Description: DNA methylation is essential for normal development and has been implicated in many pathologies including cancer. Our knowledge about the genome-wide distribution of DNA methylation, how it changes during cellular differentiation and how it relates to histone methylation and other chromatin modifications in mammals remains limited. Here we report the generation and analysis of genome-scale DNA methylation profiles at nucleotide resolution in mammalian cells. Using high-throughput reduced representation bisulphite sequencing and single-molecule-based sequencing, we generated DNA methylation maps covering most CpG islands, and a representative sampling of conserved non-coding elements, transposons and other genomic features, for mouse embryonic stem cells, embryonic-stem-cell-derived and primary neural cells, and eight other primary tissues. Several key findings emerge from the data. First, DNA methylation patterns are better correlated with histone methylation patterns than with the underlying genome sequence context. Second, methylation of CpGs are dynamic epigenetic marks that undergo extensive changes during cellular differentiation, particularly in regulatory regions outside of core promoters. Third, analysis of embryonic-stem-cell-derived and primary cells reveals that 'weak' CpG islands associated with a specific set of developmentally regulated genes undergo aberrant hypermethylation during extended proliferation in vitro, in a pattern reminiscent of that reported in some primary tumours. More generally, the results establish reduced representation bisulphite sequencing as a powerful technology for epigenetic profiling of cell populations relevant to developmental biology, cancer and regenerative medicine.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2896277/" 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/PMC2896277/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Meissner, Alexander -- Mikkelsen, Tarjei S -- Gu, Hongcang -- Wernig, Marius -- Hanna, Jacob -- Sivachenko, Andrey -- Zhang, Xiaolan -- Bernstein, Bradley E -- Nusbaum, Chad -- Jaffe, David B -- Gnirke, Andreas -- Jaenisch, Rudolf -- Lander, Eric S -- R01 HG004401/HG/NHGRI NIH HHS/ -- R01 HG004401-02/HG/NHGRI NIH HHS/ -- U54 HG003067/HG/NHGRI NIH HHS/ -- U54 HG003067-04/HG/NHGRI NIH HHS/ -- U54 HG003067-06/HG/NHGRI NIH HHS/ -- England -- Nature. 2008 Aug 7;454(7205):766-70. doi: 10.1038/nature07107. Epub 2008 Jul 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, Massachusetts 02142, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18600261" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Differentiation ; Cells, Cultured ; Conserved Sequence ; CpG Islands/genetics ; *DNA Methylation ; Embryonic Stem Cells/cytology/metabolism ; Fibroblasts/cytology ; Genome/genetics ; *Genomics ; Histones/genetics/metabolism ; Male ; Mice ; Neurons/cytology ; Pluripotent Stem Cells/*cytology/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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    Rapid appearance and local toxicity of amyloid-beta plaques in a mouse model of Alzheimer's disease (2008)
    Nature Publishing Group (NPG)
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    Publication Date: 2008-02-08
    Description: Senile plaques accumulate over the course of decades in the brains of patients with Alzheimer's disease. A fundamental tenet of the amyloid hypothesis of Alzheimer's disease is that the deposition of amyloid-beta precedes and induces the neuronal abnormalities that underlie dementia. This idea has been challenged, however, by the suggestion that alterations in axonal trafficking and morphological abnormalities precede and lead to senile plaques. The role of microglia in accelerating or retarding these processes has been uncertain. To investigate the temporal relation between plaque formation and the changes in local neuritic architecture, we used longitudinal in vivo multiphoton microscopy to sequentially image young APPswe/PS1d9xYFP (B6C3-YFP) transgenic mice. Here we show that plaques form extraordinarily quickly, over 24 h. Within 1-2 days of a new plaque's appearance, microglia are activated and recruited to the site. Progressive neuritic changes ensue, leading to increasingly dysmorphic neurites over the next days to weeks. These data establish plaques as a critical mediator of neuritic pathology.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3264491/" 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/PMC3264491/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Meyer-Luehmann, Melanie -- Spires-Jones, Tara L -- Prada, Claudia -- Garcia-Alloza, Monica -- de Calignon, Alix -- Rozkalne, Anete -- Koenigsknecht-Talboo, Jessica -- Holtzman, David M -- Bacskai, Brian J -- Hyman, Bradley T -- P30 DK056341/DK/NIDDK NIH HHS/ -- P30 DK056341-07/DK/NIDDK NIH HHS/ -- P30 DK056341-08/DK/NIDDK NIH HHS/ -- R01 AG008487/AG/NIA NIH HHS/ -- R01 AG008487-20/AG/NIA NIH HHS/ -- England -- Nature. 2008 Feb 7;451(7179):720-4. doi: 10.1038/nature06616.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Alzheimer's Disease Research Laboratory, Department of Neurology, MassGeneral Institute for Neurodegenerative Disease, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18256671" target="_blank"〉PubMed〈/a〉
    Keywords: Alzheimer Disease/genetics/metabolism/*pathology ; Amyloid beta-Peptides/genetics/metabolism/*toxicity ; Animals ; Axons/metabolism ; *Disease Models, Animal ; Disease Progression ; Mice ; Mice, Transgenic ; Microglia/metabolism ; Neurites/metabolism/pathology ; Plaque, Amyloid/genetics/metabolism/*pathology ; Time Factors
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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    Sequence- and target-independent angiogenesis suppression by siRNA via TLR3 (2008)
    Nature Publishing Group (NPG)
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    Publication Date: 2008-03-28
    Description: Clinical trials of small interfering RNA (siRNA) targeting vascular endothelial growth factor-A (VEGFA) or its receptor VEGFR1 (also called FLT1), in patients with blinding choroidal neovascularization (CNV) from age-related macular degeneration, are premised on gene silencing by means of intracellular RNA interference (RNAi). We show instead that CNV inhibition is a siRNA-class effect: 21-nucleotide or longer siRNAs targeting non-mammalian genes, non-expressed genes, non-genomic sequences, pro- and anti-angiogenic genes, and RNAi-incompetent siRNAs all suppressed CNV in mice comparably to siRNAs targeting Vegfa or Vegfr1 without off-target RNAi or interferon-alpha/beta activation. Non-targeted (against non-mammalian genes) and targeted (against Vegfa or Vegfr1) siRNA suppressed CNV via cell-surface toll-like receptor 3 (TLR3), its adaptor TRIF, and induction of interferon-gamma and interleukin-12. Non-targeted siRNA suppressed dermal neovascularization in mice as effectively as Vegfa siRNA. siRNA-induced inhibition of neovascularization required a minimum length of 21 nucleotides, a bridging necessity in a modelled 2:1 TLR3-RNA complex. Choroidal endothelial cells from people expressing the TLR3 coding variant 412FF were refractory to extracellular siRNA-induced cytotoxicity, facilitating individualized pharmacogenetic therapy. Multiple human endothelial cell types expressed surface TLR3, indicating that generic siRNAs might treat angiogenic disorders that affect 8% of the world's population, and that siRNAs might induce unanticipated vascular or immune effects.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2642938/" 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/PMC2642938/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kleinman, Mark E -- Yamada, Kiyoshi -- Takeda, Atsunobu -- Chandrasekaran, Vasu -- Nozaki, Miho -- Baffi, Judit Z -- Albuquerque, Romulo J C -- Yamasaki, Satoshi -- Itaya, Masahiro -- Pan, Yuzhen -- Appukuttan, Binoy -- Gibbs, Daniel -- Yang, Zhenglin -- Kariko, Katalin -- Ambati, Balamurali K -- Wilgus, Traci A -- DiPietro, Luisa A -- Sakurai, Eiji -- Zhang, Kang -- Smith, Justine R -- Taylor, Ethan W -- Ambati, Jayakrishna -- R01 EY015422/EY/NEI NIH HHS/ -- R01 EY015422-04/EY/NEI NIH HHS/ -- R01 EY018350/EY/NEI NIH HHS/ -- R01 EY018350-02/EY/NEI NIH HHS/ -- R01 EY018836/EY/NEI NIH HHS/ -- R01 EY018836-01/EY/NEI NIH HHS/ -- England -- Nature. 2008 Apr 3;452(7187):591-7. doi: 10.1038/nature06765. Epub 2008 Mar 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ophthalmology, University of Kentucky, Lexington, Kentucky 40506, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18368052" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Endothelial Cells/metabolism ; Genetic Therapy/*methods ; Humans ; Immunity, Innate/*immunology ; Interferon-gamma/immunology ; Interleukin-12/immunology ; Macular Degeneration/complications/genetics/therapy ; Mice ; Mice, Inbred C57BL ; Neovascularization, Pathologic/genetics/*immunology/*prevention & control/therapy ; RNA, Small Interfering/chemistry/genetics/*immunology/*metabolism ; Toll-Like Receptor 3/chemistry/genetics/*metabolism ; Vascular Endothelial Growth Factor A/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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