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  • Mice, Transgenic  (2)
  • STRUCTURAL MECHANICS  (2)
  • Models, Molecular
  • 2000-2004  (3)
  • 1965-1969  (2)
  • 1
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    Virus-assisted mapping of neural inputs to a feeding center in the hypothalamus (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2001-04-03
    Beschreibung: We report the development of a pseudorabies virus that can be used for retrograde tracing from selected neurons. This virus encodes a green fluorescent protein marker and replicates only in neurons that express the Cre recombinase and in neurons in synaptic contact with the originally infected cells. The virus was injected into the arcuate nucleus of mice that express Cre only in those neurons that express neuropeptide Y or the leptin receptor. Sectioning of the brains revealed that these neurons receive inputs from neurons in other regions of the hypothalamus, as well as the amygdala, cortex, and other brain regions. These data suggest that higher cortical centers modulate leptin signaling in the hypothalamus. This method of neural tracing may prove useful in studies of other complex neural circuits.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DeFalco, J -- Tomishima, M -- Liu, H -- Zhao, C -- Cai, X -- Marth, J D -- Enquist, L -- Friedman, J M -- DK48247/DK/NIDDK NIH HHS/ -- R01133506/PHS HHS/ -- R01DK41096/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2001 Mar 30;291(5513):2608-13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, The Rockefeller University, New York, NY 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11283374" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Afferent Pathways ; Animals ; Arcuate Nucleus of Hypothalamus/cytology/*physiology/virology ; Brain/cytology/*physiology/virology ; Brain Mapping ; Carrier Proteins/genetics/metabolism ; Chromosomes, Artificial, Bacterial ; *Eating ; Gene Expression ; Green Fluorescent Proteins ; Herpesvirus 1, Suid/*genetics/physiology ; Hypothalamus/cytology/*physiology/virology ; Integrases/genetics/metabolism ; Luminescent Proteins/genetics/metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Neurons/*metabolism/virology ; Neuropeptide Y/genetics/metabolism ; *Receptors, Cell Surface ; Receptors, Leptin ; Recombinant Fusion Proteins/metabolism ; Recombination, Genetic ; *Viral Proteins ; Virus Replication ; tau Proteins/genetics/metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
  • 2
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    Rapid rewiring of arcuate nucleus feeding circuits by leptin (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2004-04-06
    Beschreibung: The fat-derived hormone leptin regulates energy balance in part by modulating the activity of neuropeptide Y and proopiomelanocortin neurons in the hypothalamic arcuate nucleus. To study the intrinsic activity of these neurons and their responses to leptin, we generated mice that express distinct green fluorescent proteins in these two neuronal types. Leptin-deficient (ob/ob) mice differed from wild-type mice in the numbers of excitatory and inhibitory synapses and postsynaptic currents onto neuropeptide Y and proopiomelanocortin neurons. When leptin was delivered systemically to ob/ob mice, the synaptic density rapidly normalized, an effect detectable within 6 hours, several hours before leptin's effect on food intake. These data suggest that leptin-mediated plasticity in the ob/ob hypothalamus may underlie some of the hormone's behavioral effects.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pinto, Shirly -- Roseberry, Aaron G -- Liu, Hongyan -- Diano, Sabrina -- Shanabrough, Marya -- Cai, Xiaoli -- Friedman, Jeffrey M -- Horvath, Tamas L -- DK060711/DK/NIDDK NIH HHS/ -- F32DK61176/DK/NIDDK NIH HHS/ -- F32NS046921/NS/NINDS NIH HHS/ -- R01 DK041096/DK/NIDDK NIH HHS/ -- R01 DK061619/DK/NIDDK NIH HHS/ -- RR014451/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2004 Apr 2;304(5667):110-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Genetics, Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15064421" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Arcuate Nucleus of Hypothalamus/cytology/*physiology ; Body Weight/drug effects ; Eating ; Evoked Potentials ; Excitatory Postsynaptic Potentials ; *Feeding Behavior/drug effects ; Ghrelin ; Glutamic Acid/analysis ; Green Fluorescent Proteins ; In Vitro Techniques ; Leptin/genetics/pharmacology/*physiology ; Luminescent Proteins/analysis ; Mice ; Mice, Obese ; Mice, Transgenic ; Neuronal Plasticity/*physiology ; Neurons/drug effects/*physiology ; Neuropeptide Y/genetics/physiology ; Patch-Clamp Techniques ; Peptide Hormones/pharmacology ; Pro-Opiomelanocortin/genetics/physiology ; Recombinant Fusion Proteins/analysis ; Synapses/chemistry/ultrastructure ; Tetrodotoxin/pharmacology ; Transgenes ; gamma-Aminobutyric Acid/analysis
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 3
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    A four-base paired genetic helix with expanded size (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2003-11-01
    Beschreibung: We describe a new molecular class of genetic-pairing system that has a native DNA backbone but has all four base pairs replaced by new, larger pairs. The base pairs include size-expanded analogs of thymine and of adenine, both extended by the width of a benzene ring (2.4 A). The expanded-diameter double helices are more thermodynamically stable than the Watson-Crick helix, likely because of enhanced base stacking. Structural data confirm a right-handed, double-stranded, and base-paired helical form. Because of the larger base size, all the pairs of this helical system are fluorescent, which suggests practical applications in detection of natural DNA and RNA. Our findings establish that there is no apparent structural or thermodynamic prohibition against genetic systems having sizes different from the natural one.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, Haibo -- Gao, Jianmin -- Lynch, Stephen R -- Saito, Y David -- Maynard, Lystranne -- Kool, Eric T -- GM52956/GM/NIGMS NIH HHS/ -- GM63587/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2003 Oct 31;302(5646):868-71.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, Stanford University, Stanford, CA 94305-5080, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14593180" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adenine/*analogs & derivatives/chemistry ; *Base Pairing ; Base Sequence ; Benzene/chemistry ; Circular Dichroism ; Hydrogen Bonding ; Models, Molecular ; Nuclear Magnetic Resonance, Biomolecular ; *Nucleic Acid Conformation ; Nucleic Acid Denaturation ; Nucleic Acid Hybridization ; Oligodeoxyribonucleotides/*chemistry ; Temperature ; Thermodynamics ; Thymine/*analogs & derivatives/chemistry
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 4
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    Fatigue crack propagation and strain cycling properties. (1969)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-12
    Beschreibung: Fatigue crack propagation caused by cumulative damage due to strain cycling at crack tip, relating resistance to cyclic ductility
    Schlagwort(e): STRUCTURAL MECHANICS
    Materialart: ; ADEMIE DES SCIENCES
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 5
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    A mechanical model for fatigue crack propagation. (1969)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: Mechanical model for fatigue crack propagation assuming propagation as function of material strain cycling at crack tip
    Schlagwort(e): STRUCTURAL MECHANICS
    Materialart: INTERNATIONAL CONGRESS ON FRACTURE; Apr 13, 1969 - Apr 18, 1969; BRIGHTON
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
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