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  • Cells, Cultured  (175)
  • American Association for the Advancement of Science (AAAS)  (175)
  • Blackwell Publishing Ltd
  • 1990-1994  (175)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (175)
  • Blackwell Publishing Ltd
Years
Year
  • 1
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    Harpin, elicitor of the hypersensitive response produced by the plant pathogen Erwinia amylovora (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-07-03
    Description: A proteinaceous elicitor of the plant defense reaction known as the hypersensitive response was isolated from Erwinia amylovora, the bacterium that causes fire blight of pear, apple, and other rosaceous plants. The elicitor, named harpin, is an acidic, heat-stable, cell-envelope-associated protein with an apparent molecular weight of 44 kilodaltons. Harpin caused tobacco leaf lamina to collapse and caused an increase in the pH of bathing solutions of suspension-cultured tobacco cells. The gene encoding harpin (hrpN) was located in the 40-kilobase hrp gene cluster of E. amylovora, sequenced, and mutated with Tn5tac1. The hrpN mutants were not pathogenic to pear, did not elicit the hypersensitive response, and did not produce harpin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wei, Z M -- Laby, R J -- Zumoff, C H -- Bauer, D W -- He, S Y -- Collmer, A -- Beer, S V -- New York, N.Y. -- Science. 1992 Jul 3;257(5066):85-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Pathology, Cornell University, Ithaca, NY 14853.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1621099" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; *Bacterial Outer Membrane Proteins ; Bacterial Proteins/*genetics/isolation & purification/metabolism ; Cells, Cultured ; Erwinia/genetics/pathogenicity/*physiology ; Escherichia coli/genetics ; *Genes, Bacterial ; Membrane Proteins/*genetics/isolation & purification/metabolism ; Molecular Sequence Data ; *Multigene Family ; Plants, Toxic ; Restriction Mapping ; Tobacco/microbiology
    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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    Post-transcriptional regulation of early T cell development by T cell receptor signals (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-11-27
    Description: During differentiation in the thymus, immature T cells progress through an ordered sequence of developmental stages that are best characterized by variable expression of the co-receptor molecules CD4 and CD8. Crosslinking of T cell receptor (TCR) molecules on precursor thymocytes was found to block their differentiation into CD4+CD8+ cells by eliminating messenger RNA's encoding two families of developmentally important molecules: the co-receptor molecules CD4 and CD8 and the recombination activating genes 1 and 2. TCR-induced post-transcriptional regulation in early thymocytes was specific for selective messenger RNA's, required protein synthesis, and was itself developmentally regulated. These data identify a post-transcriptional mechanism that is influenced by TCR signals and that regulates early thymocyte development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Takahama, Y -- Singer, A -- New York, N.Y. -- Science. 1992 Nov 27;258(5087):1456-62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Experimental Immunology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1439838" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD4/genetics ; Antigens, CD8/genetics ; Cell Differentiation/physiology ; Cells, Cultured ; Fetus/cytology ; Gene Rearrangement, T-Lymphocyte/genetics ; Genes, RAG-1/genetics ; Mice ; Protein Synthesis Inhibitors/pharmacology ; Protein-Tyrosine Kinases/genetics ; RNA Processing, Post-Transcriptional/physiology ; RNA, Messenger/metabolism ; Receptors, Antigen, T-Cell, alpha-beta/genetics/*physiology ; Signal Transduction/physiology ; T-Lymphocytes/*cytology/drug effects ; Tetradecanoylphorbol Acetate/pharmacology ; Thymus Gland/cytology/embryology
    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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    Betacellulin: a mitogen from pancreatic beta cell tumors (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-03-12
    Description: Betacellulin, a member of the epidermal growth factor family, has been identified in the conditioned medium of cell lines derived from mouse pancreatic beta cell tumors. Betacellulin is a 32-kilodalton glycoprotein that appears to be processed from a larger transmembrane precursor by proteolytic cleavage. The carboxyl-terminal domain of betacellulin has 50 percent sequence similarity with that of rat transforming growth factor alpha. Betacellulin is a potent mitogen for retinal pigment epithelial cells and vascular smooth muscle cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shing, Y -- Christofori, G -- Hanahan, D -- Ono, Y -- Sasada, R -- Igarashi, K -- Folkman, J -- CA 70118/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1993 Mar 12;259(5101):1604-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Surgery, Children's Hospital, Boston, MA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8456283" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Amino Acid Sequence ; Animals ; Base Sequence ; Betacellulin ; Cell Division/drug effects ; Cells, Cultured ; DNA Replication/drug effects ; Endothelium, Vascular/cytology/drug effects ; Epidermal Growth Factor/pharmacology ; Growth Substances/*genetics/isolation & purification/pharmacology ; Humans ; *Intercellular Signaling Peptides and Proteins ; Islets of Langerhans/physiopathology ; Kinetics ; Mice ; Molecular Sequence Data ; Muscle, Smooth, Vascular/cytology/drug effects ; Oligodeoxyribonucleotides ; Pancreatic Neoplasms/*physiopathology ; Pigment Epithelium of Eye/cytology/drug effects ; Polymerase Chain Reaction/methods ; Protein Precursors/genetics ; Rats ; Receptor, Epidermal Growth Factor/metabolism ; Recombinant Proteins/pharmacology ; Sequence Homology, Amino Acid ; Thymidine/metabolism ; Transforming Growth Factor alpha/genetics
    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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  • 4
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    Activity-dependent synaptic competition in vitro: heterosynaptic suppression of developing synapses (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-11-15
    Description: The development and stability of synaptic connections in the nervous system are influenced by the pattern of electrical activity and the competitive interaction between the adjacent nerve terminals. To investigate this influence, a culture system of nerve and muscle cells has been developed in which a single embryonic muscle cell is coinnervated by two spinal neurons. The effect of electrical activity on the synaptic efficacy was examined after repetitive electrical stimulation was applied to one or both neurons. Brief tetanic stimulation of one neuron resulted in immediate functional suppression of the synapse made by the unstimulated neuron innervating the same muscle cell. This heterosynaptic suppression was largely absent when the tetanic stimulation was applied concurrently to both neurons. This result demonstrates that activity-dependent synaptic competition can be studied in vitro at a cellular level.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lo, Y J -- Poo, M M -- NS 22764/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1991 Nov 15;254(5034):1019-22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Columbia University, New York, NY 10027.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1658939" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Electric Stimulation ; In Vitro Techniques ; Muscle Contraction ; Muscles/embryology/*innervation/physiology ; Neuromuscular Junction/embryology/*physiology ; Spinal Nerves/*embryology/physiology ; Synapses/*physiology ; Synaptic Transmission ; Xenopus laevis
    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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  • 5
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    Yin and yang of phosphorylation in cytokine signaling (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-10-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tan, Y H -- New York, N.Y. -- Science. 1993 Oct 15;262(5132):376-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Molecular and Cell Biology, National University of Singapore, Republic of Singapore.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7692598" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Cytokines/*metabolism/pharmacology ; Humans ; Interferons/metabolism/pharmacology ; Interleukins/metabolism/pharmacology ; Mice ; Models, Biological ; Phosphoprotein Phosphatases/*metabolism ; Phosphorylation ; Protein Kinases/*metabolism ; *Signal Transduction ; T-Lymphocytes/metabolism ; Tumor Necrosis Factor-alpha/metabolism/pharmacology
    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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    cdc2 gene expression at the G1 to S transition in human T lymphocytes (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-11-09
    Description: The product of the cdc2 gene, designated p34cdc2, is a serine-threonine protein kinase that controls entry of eukaryotic cells into mitosis. Freshly isolated human T lymphocytes (G0 phase) were found to have very low amounts of p34cdc2 and cdc2 messenger RNA. Expression of cdc2 increased 18 to 24 hours after exposure of T cells to phytohemagglutinin, coincident with the G1 to S transition. Antisense oligodeoxynucleotides could reduce the increase in cdc2 expression and inhibited DNA synthesis, but had no effect on several early and mid-G1 events, including blastogenesis and expression of interleukin-2 receptors, transferrin receptors, c-myb, and c-myc. Induction of cdc2 required prior induction of c-myb and c-myc. These results suggest that cdc2 induction is part of an orderly sequence of events that occurs at the G1 to S transition in T cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Furukawa, Y -- Piwnica-Worms, H -- Ernst, T J -- Kanakura, Y -- Griffin, J D -- CA36167/CA/NCI NIH HHS/ -- CA47843/CA/NCI NIH HHS/ -- CA50767/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1990 Nov 9;250(4982):805-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA 02115.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2237430" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Blotting, Northern ; CDC2 Protein Kinase/biosynthesis/*genetics ; Cells, Cultured ; DNA/biosynthesis/genetics ; Flow Cytometry ; *G1 Phase ; *Gene Expression Regulation ; Genes, Retinoblastoma ; Genes, myc ; Humans ; Lymphocyte Activation ; Molecular Sequence Data ; Phosphorylation ; Polymerase Chain Reaction ; Proto-Oncogene Proteins/genetics ; Proto-Oncogene Proteins c-myb ; RNA, Messenger/biosynthesis/genetics ; *S Phase ; T-Lymphocytes/*cytology/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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    Hebbian depression of isolated neuromuscular synapses in vitro (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-06-12
    Description: Modulation of synaptic efficacy may depend on the temporal correlation between pre- and postsynaptic activities. At isolated neuromuscular synapses in culture, repetitive postsynaptic application of acetylcholine pulses alone or in the presence of asynchronous presynaptic activity resulted in immediate and persistent synaptic depression, whereas synchronous pre- and postsynaptic coactivation had no effect. This synaptic depression was a result of a reduction of evoked transmitter release, but induction of the depression requires a rise in postsynaptic cytosolic calcium concentration. Thus, Hebbian modulation operates at isolated peripheral synapses in vitro, and transsynaptic retrograde interaction appears to be an underlying mechanism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dan, Y -- Poo, M M -- NS 22764/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1992 Jun 12;256(5063):1570-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Columbia University, New York, NY 10027.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1317971" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; In Vitro Techniques ; Neural Inhibition ; Neuromuscular Junction/*physiology ; *Synaptic Transmission ; Xenopus laevis
    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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    Regulation of proteolysis at the neutrophil-substrate interface by secretory leukoprotease inhibitor (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-07-13
    Description: Human neutrophils can initiate the rapid degradation of extracellular matrix macromolecules by localizing the destructive process to sites of cell-substrate contact. Although plasma and its filtrates contain multiple proteinase inhibitors, these inhibitors did not prevent neutrophils from attacking either underlying fibronectin or elastin. However, subjacent substrates could be protected from neutrophils by recombinant secretory leukoprotease inhibitor, a structurally unique serine proteinase inhibitor whose natural counterpart is normally confined to human mucous secretions. The identification of this extravascular proteinase inhibitor as a potent regulator of subjacent proteolysis could lead to the development of a new class of anti-inflammatory therapeutics.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rice, W G -- Weiss, S J -- AI 21301/AI/NIAID NIH HHS/ -- HL 28024/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1990 Jul 13;249(4965):178-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Internal Medicine, Simpson Memorial Research Institute, University of Michigan, Ann Arbor 48109.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2371565" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Adhesion ; Cells, Cultured ; Elastin/metabolism ; Extracellular Matrix/*metabolism ; Fibronectins/metabolism ; Humans ; Neutrophils/*metabolism ; Proteinase Inhibitory Proteins, Secretory ; *Proteins ; Recombinant Proteins/metabolism ; Serine Proteinase Inhibitors/*metabolism ; Solubility
    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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  • 9
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    Developmental regulation of neural response to FGF-1 and FGF-2 by heparan sulfate proteoglycan (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-04-02
    Description: Murine neural precursor cells and cell lines derived from them are stimulated by members of the heparin-binding fibroblast growth factor (FGF) family. The activity of FGF is regulated by heparan sulfate proteoglycans (HSPGs), and this interaction is an essential prerequisite for the binding of growth factor to the signal transducing receptors. Messenger RNA for FGF-2 was detectable in the neuroepithelium at embryonic day 9, and the HSPGs produced by these cells at this time preferentially bound FGF-2. However, at embryonic day 11, when messenger RNA for FGF-1 was first detectable, there was a switch in the binding specificity of the HSPG to FGF-1. Thus, a single species of HSPG undergoes a rapid, tightly controlled change in growth factor-binding specificity concomitant with the temporal expression of the FGFs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nurcombe, V -- Ford, M D -- Wildschut, J A -- Bartlett, P F -- New York, N.Y. -- Science. 1993 Apr 2;260(5104):103-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anatomy and Cell Biology, University of Melbourne, Parkville, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7682010" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Cell Division ; Cells, Cultured ; Culture Media, Conditioned ; Epithelium/chemistry/embryology ; Fibroblast Growth Factor 1/genetics/*pharmacology ; Fibroblast Growth Factor 2/genetics/*pharmacology ; Gene Expression ; Gestational Age ; Heparan Sulfate Proteoglycans ; Heparitin Sulfate/*pharmacology ; Mice ; Molecular Weight ; Nervous System/chemistry/*embryology/metabolism ; Neurons/cytology ; Polysaccharide-Lyases/metabolism ; Proteoglycans/*pharmacology ; RNA, Messenger/analysis ; Signal Transduction/physiology ; Stem Cells/cytology
    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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  • 10
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    Prevention of vertebrate neuronal death by the crmA gene (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-02-11
    Description: Interleukin-1 beta converting enzyme (ICE) is a mammalian homolog of CED-3, a protein required for programmed cell death in the nematode Caenorhabditis elegans. The activity of ICE can be specifically inhibited by the product of crmA, a cytokine response modifier gene encoded by cowpox virus. Microinjection of the crmA gene into chicken dorsal root ganglion neurons was found to prevent cell death induced by deprivation of nerve growth factor. Thus, ICE is likely to participate in neuronal death in vertebrates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gagliardini, V -- Fernandez, P A -- Lee, R K -- Drexler, H C -- Rotello, R J -- Fishman, M C -- Yuan, J -- New York, N.Y. -- Science. 1994 Feb 11;263(5148):826-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cardiovascular Research Center, Massachusetts General Hospital, Charlestown 02129.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8303301" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Apoptosis ; Caspase 1 ; Cells, Cultured ; Chickens ; Ganglia, Spinal ; Gene Expression ; Metalloendopeptidases/*genetics/physiology ; Microinjections ; Nerve Growth Factors/pharmacology ; Neurons, Afferent/*cytology/metabolism ; Proto-Oncogene Proteins/genetics/physiology ; Proto-Oncogene Proteins c-bcl-2 ; Serpins/*genetics/physiology ; *Viral Proteins
    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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