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  • 1
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    Shared actions of endotoxin and taxol on TNF receptors and TNF release (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-04-20
    Description: Bacterial lipopolysaccharide (LPS) exerts profound effects on mammalian hosts in part by inducing macrophages to release tumor necrosis factor-alpha (TNF-alpha); the mechanisms involved are unresolved. The microtubule stabilizer taxol shared two actions of LPS on macrophages: it rapidly decreased TNF-alpha receptors and triggered TNF-alpha release. Both actions of taxol were absent in LPS-hyporesponsive C3H/HeJ mice. In recombinant inbred mice, the genes controlling responses to LPS and to taxol were closely linked. Dexamethasone blocked release of TNF-alpha by both stimuli but did not block the decrease in TNF-alpha receptors. Thus, a protein associated with microtubules may be a cellular target of LPS.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ding, A H -- Porteu, F -- Sanchez, E -- Nathan, C F -- CA-43610/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1990 Apr 20;248(4953):370-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Cornell University Medical College, New York, NY 10021.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1970196" target="_blank"〉PubMed〈/a〉
    Keywords: Alkaloids/*pharmacology ; Animals ; Crosses, Genetic ; Dexamethasone/pharmacology ; Lipopolysaccharides/*pharmacology ; Macrophages/*drug effects/metabolism ; Mice ; Mice, Inbred C3H ; Mice, Inbred C57BL ; Mice, Mutant Strains ; Paclitaxel ; Receptors, Cell Surface/*drug effects/metabolism ; Receptors, Tumor Necrosis Factor ; Tumor Necrosis Factor-alpha/*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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  • 2
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    The anatomy of the world's largest extinct rodent (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-09-23
    Description: Phoberomys is reported to be the largest rodent that ever existed, although it has been known only from isolated teeth and fragmentary postcranial bones. An exceptionally complete skeleton of Phoberomys pattersoni was discovered in a rich locality of fossil vertebrates in the Upper Miocene of Venezuela. Reliable body mass estimates yield approximately 700 kilograms, more than 10 times the mass of the largest living rodent, the capybara. With Phoberomys, Rodentia becomes one of the mammalian orders with the largest size range, second only to diprotodontian marsupials. Several postcranial features support an evolutionary relationship of Phoberomys with pakaranas from the South American rodent radiation. The associated fossil fauna is diverse and suggests that Phoberomys lived in marginal lagoons and wetlands.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sanchez-Villagra, Marcelo R -- Aguilera, Orangel -- Horovitz, Ines -- New York, N.Y. -- Science. 2003 Sep 19;301(5640):1708-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Universitat Tubingen, Spezielle Zoologie, Auf der Morgenstelle 28, D-72076 Tubingen, Germany. marcelo.sanchez@uni-tuebingen.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14500978" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Body Constitution ; Body Weight ; Bone and Bones/anatomy & histology ; Diet ; Environment ; Femur/anatomy & histology ; Forelimb/anatomy & histology ; *Fossils ; Hindlimb/anatomy & histology ; Humerus/anatomy & histology ; Locomotion ; Phylogeny ; Rodentia/*anatomy & histology/classification/physiology ; Skeleton ; Skull/anatomy & histology ; Tooth/anatomy & histology ; Venezuela
    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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  • 3
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    Cross-linking cellular prion protein triggers neuronal apoptosis in vivo (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-01-31
    Description: Neuronal death is a prominent, but poorly understood, pathological hallmark of prion disease. Notably, in the absence of the cellular prion protein (PrPC), the disease-associated isoform, PrPSc, appears not to be intrinsically neurotoxic, suggesting that PrPC itself may participate directly in the prion neurodegenerative cascade. Here, cross-linking PrPC in vivo with specific monoclonal antibodies was found to trigger rapid and extensive apoptosis in hippocampal and cerebellar neurons. These findings suggest that PrPC functions in the control of neuronal survival and provides a model to explore whether cross-linking of PrPC by oligomeric PrPSc can promote neuronal loss during prion infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Solforosi, Laura -- Criado, Jose R -- McGavern, Dorian B -- Wirz, Sebastian -- Sanchez-Alavez, Manuel -- Sugama, Shuei -- DeGiorgio, Lorraine A -- Volpe, Bruce T -- Wiseman, Erika -- Abalos, Gil -- Masliah, Eliezer -- Gilden, Donald -- Oldstone, Michael B -- Conti, Bruno -- Williamson, R Anthony -- AG00080/AG/NIA NIH HHS/ -- AG04342/AG/NIA NIH HHS/ -- AI09484/AI/NIAID NIH HHS/ -- HL63817/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2004 Mar 5;303(5663):1514-6. Epub 2004 Jan 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, The Scripps Research Institute, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14752167" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/immunology/*metabolism ; *Apoptosis ; Cell Survival ; Cerebellum/*cytology ; Complement Activation ; Dimerization ; Hippocampus/*cytology ; Immunoglobulin Fab Fragments/immunology/metabolism ; Immunoglobulin G/immunology/metabolism ; In Situ Nick-End Labeling ; Mice ; Mice, Inbred C57BL ; Neural Cell Adhesion Molecules/immunology/metabolism ; Neurons/*physiology ; PrPC Proteins/chemistry/immunology/*metabolism ; Recombinant Proteins/metabolism ; Signal Transduction
    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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    Involvement of mammalian Mus81 in genome integrity and tumor suppression (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-06-19
    Description: Mus81-Eme1 endonuclease has been implicated in the rescue of stalled replication forks and the resolution of meiotic recombination intermediates in yeast. We used gene targeting to study the physiological requirements of Mus81 in mammals. Mus81-/- mice are viable and fertile, which indicates that mammalian Mus81 is not essential for recombination processes associated with meiosis. Mus81-deficient mice and cells were hypersensitive to the DNA cross-linking agent mitomycin C but not to gamma-irradiation. Remarkably, both homozygous Mus81-/- and heterozygous Mus81+/- mice exhibited a similar susceptibility to spontaneous chromosomal damage and a profound and equivalent predisposition to lymphomas and other cancers. These studies demonstrate a critical role for the proper biallelic expression of the mammalian Mus81 in the maintenance of genomic integrity and tumor suppression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McPherson, John Peter -- Lemmers, Benedicte -- Chahwan, Richard -- Pamidi, Ashwin -- Migon, Eva -- Matysiak-Zablocki, Elzbieta -- Moynahan, Mary Ellen -- Essers, Jeroen -- Hanada, Katsuhiro -- Poonepalli, Anuradha -- Sanchez-Sweatman, Otto -- Khokha, Rama -- Kanaar, Roland -- Jasin, Maria -- Hande, M Prakash -- Hakem, Razqallah -- New York, N.Y. -- Science. 2004 Jun 18;304(5678):1822-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ontario Cancer Institute, 620 University Avenue, Suite 706, Toronto, Ontario, Canada M5G 2C1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15205536" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Chromosome Aberrations ; DNA Damage ; DNA-Binding Proteins/*genetics/*physiology ; Embryo, Mammalian/cytology ; Embryonic and Fetal Development ; *Endonucleases ; Gamma Rays ; Gene Targeting ; Genetic Predisposition to Disease ; *Genome ; *Genomic Instability ; Heterozygote ; Lymphoma/etiology/genetics/pathology ; Meiosis ; Mice ; Mitomycin/pharmacology ; Neoplasms/etiology/*genetics ; Recombination, Genetic ; Saccharomyces cerevisiae Proteins ; Sister Chromatid Exchange ; Stem Cells ; T-Lymphocytes/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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  • 5
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    Genetic identification of a hantavirus associated with an outbreak of acute respiratory illness (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-11-05
    Description: A mysterious respiratory illness with high mortality was recently reported in the southwestern United States. Serologic studies implicated the hantaviruses, rodent-borne RNA viruses usually associated elsewhere in the world with hemorrhagic fever with renal syndrome. A genetic detection assay amplified hantavirus-specific DNA fragments from RNA extracted from the tissues of patients and deer mice (Peromyscus maniculatus) caught at or near patient residences. Nucleotide sequence analysis revealed the associated virus to be a new hantavirus and provided a direct genetic link between infection in patients and rodents.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nichol, S T -- Spiropoulou, C F -- Morzunov, S -- Rollin, P E -- Ksiazek, T G -- Feldmann, H -- Sanchez, A -- Childs, J -- Zaki, S -- Peters, C J -- New York, N.Y. -- Science. 1993 Nov 5;262(5135):914-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Viral and Rickettsial Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8235615" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Bunyaviridae Infections/epidemiology/*microbiology/veterinary ; DNA Primers ; *Disease Outbreaks ; *Disease Reservoirs ; *Genome, Viral ; Hantavirus/classification/*genetics/isolation & purification ; Humans ; Lung Diseases/epidemiology/*microbiology ; Molecular Sequence Data ; Peromyscus/*microbiology ; Phylogeny ; Polymerase Chain Reaction ; Rodent Diseases/epidemiology/microbiology ; Sequence Homology, Nucleic Acid ; Southwestern United States/epidemiology
    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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