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  • 1
    Publication Date: 2005-09-24
    Description: Aneuploidies are common chromosomal defects that result in growth and developmental deficits and high levels of lethality in humans. To gain insight into the biology of aneuploidies, we manipulated mouse embryonic stem cells and generated a trans-species aneuploid mouse line that stably transmits a freely segregating, almost complete human chromosome 21 (Hsa21). This "transchromosomic" mouse line, Tc1, is a model of trisomy 21, which manifests as Down syndrome (DS) in humans, and has phenotypic alterations in behavior, synaptic plasticity, cerebellar neuronal number, heart development, and mandible size that relate to human DS. Transchromosomic mouse lines such as Tc1 may represent useful genetic tools for dissecting other human aneuploidies.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1378183/" 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/PMC1378183/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Doherty, Aideen -- Ruf, Sandra -- Mulligan, Claire -- Hildreth, Victoria -- Errington, Mick L -- Cooke, Sam -- Sesay, Abdul -- Modino, Sonie -- Vanes, Lesley -- Hernandez, Diana -- Linehan, Jacqueline M -- Sharpe, Paul T -- Brandner, Sebastian -- Bliss, Timothy V P -- Henderson, Deborah J -- Nizetic, Dean -- Tybulewicz, Victor L J -- Fisher, Elizabeth M C -- 076700/Wellcome Trust/United Kingdom -- MC_U117512674/Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2005 Sep 23;309(5743):2033-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurodegenerative Disease, Institute of Neurology, Queen Square, London WC1N 3BG, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16179473" target="_blank"〉PubMed〈/a〉
    Keywords: *Aneuploidy ; Animals ; Behavior, Animal ; Brain/pathology ; Cell Count ; Cell Line ; Chimera ; *Chromosomes, Human, Pair 21 ; *Disease Models, Animal ; *Down Syndrome/genetics/physiopathology ; Embryo, Mammalian/cytology ; Facial Bones/pathology ; Female ; Gene Expression ; *Genetic Engineering ; Genetic Markers ; Heart Defects, Congenital/embryology ; Hippocampus/physiopathology ; Humans ; Long-Term Potentiation ; Lymphocyte Activation ; Male ; Maze Learning ; Memory ; Mice ; Mice, Inbred Strains ; *Mice, Transgenic ; Neurons/cytology ; Oligonucleotide Array Sequence Analysis ; Phenotype ; Skull/pathology ; Stem Cells ; Synaptic Transmission ; T-Lymphocytes/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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  • 2
    Publication Date: 1993-10-15
    Description: Repetitive activation of excitatory synapses in the hippocampus produces a persistent enhancement of synaptic efficiency known as long-term potentiation (LTP). In anesthetized and in freely moving rats, the induction of LTP in the perforant path led to a transient increase in the amount of messenger RNA (mRNA) coding for a presynaptic glutamate receptor (GR33) in dentate granule cells. The amount of GR33 mRNA was increased for at least 5 hours after the induction of LTP but was indistinguishable from control values 1 day after induction. The N-methyl-D-aspartate receptor antagonist 2-aminophosphonovalerate prevented the induction of both LTP and the increase in GR33 mRNA. The amount of GR33 protein was increased in the mossy fiber terminal zone of dentate granule cells 5 hours after the induction of LTP. These results suggest that the induction of LTP in synapses at one stage in a neural network may lead to modification in synaptic function at the next stage in the network.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smirnova, T -- Laroche, S -- Errington, M L -- Hicks, A A -- Bliss, T V -- Mallet, J -- New York, N.Y. -- Science. 1993 Oct 15;262(5132):433-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de genetique moleculaire de la neurotransmission et des processus neurodegeneratifs, Centre National de la Recherche Scientifique (CNRS), Gif-sur-Yvette, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8105538" target="_blank"〉PubMed〈/a〉
    Keywords: 2-Amino-5-phosphonovalerate/pharmacology ; Animals ; Electric Stimulation ; Evoked Potentials ; Gene Expression ; Hippocampus/*metabolism/physiology ; In Situ Hybridization ; Male ; RNA, Messenger/genetics/metabolism ; Rats ; Rats, Sprague-Dawley ; Receptors, Glutamate/biosynthesis/*genetics ; Receptors, Presynaptic/biosynthesis/*genetics ; Synapses/*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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