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  • 1
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    Driving the growth cone (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-09-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Caroni, P -- New York, N.Y. -- Science. 1998 Sep 4;281(5382):1465-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Friedrich Miescher Institute, Basel, Switzerland. caroni@fmi.ch〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9750116" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/physiology ; Animals ; Axons/*physiology ; Brain-Derived Neurotrophic Factor/physiology ; Calcium/metabolism ; Cell Movement ; Cyclic AMP/*physiology ; Cyclic GMP/*physiology ; Glycoproteins/physiology ; Nerve Growth Factors/physiology ; Neurons/*physiology ; Neurotrophin 3 ; Semaphorin-3A ; Signal Transduction ; Tumor Suppressor Proteins
    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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    Perineuronal nets protect fear memories from erasure (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-09-05
    Description: In adult animals, fear conditioning induces a permanent memory that is resilient to erasure by extinction. In contrast, during early postnatal development, extinction of conditioned fear leads to memory erasure, suggesting that fear memories are actively protected in adults. We show here that this protection is conferred by extracellular matrix chondroitin sulfate proteoglycans (CSPGs) in the amygdala. The organization of CSPGs into perineuronal nets (PNNs) coincided with the developmental switch in fear memory resilience. In adults, degradation of PNNs by chondroitinase ABC specifically rendered subsequently acquired fear memories susceptible to erasure. This result indicates that intact PNNs mediate the formation of erasure-resistant fear memories and identifies a molecular mechanism closing a postnatal critical period during which traumatic memories can be erased by extinction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gogolla, Nadine -- Caroni, Pico -- Luthi, Andreas -- Herry, Cyril -- New York, N.Y. -- Science. 2009 Sep 4;325(5945):1258-61. doi: 10.1126/science.1174146.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, CH-4058 Basel, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19729657" target="_blank"〉PubMed〈/a〉
    Keywords: Amygdala/cytology/growth & development/*physiology ; Animals ; Chondroitin ABC Lyase/metabolism ; Chondroitin Sulfate Proteoglycans/metabolism/*physiology ; Conditioning, Classical ; Cues ; *Extinction, Psychological ; Extracellular Matrix/physiology ; *Fear ; Learning ; Male ; Memory/*physiology ; Mice ; Mice, Inbred C57BL ; Neuronal Plasticity
    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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  • 3
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    Learning-related feedforward inhibitory connectivity growth required for memory precision (2011)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2011-05-03
    Description: In the adult brain, new synapses are formed and pre-existing ones are lost, but the function of this structural plasticity has remained unclear. Learning of new skills is correlated with formation of new synapses. These may directly encode new memories, but they may also have more general roles in memory encoding and retrieval processes. Here we investigated how mossy fibre terminal complexes at the entry of hippocampal and cerebellar circuits rearrange upon learning in mice, and what is the functional role of the rearrangements. We show that one-trial and incremental learning lead to robust, circuit-specific, long-lasting and reversible increases in the numbers of filopodial synapses onto fast-spiking interneurons that trigger feedforward inhibition. The increase in feedforward inhibition connectivity involved a majority of the presynaptic terminals, restricted the numbers of c-Fos-expressing postsynaptic neurons at memory retrieval, and correlated temporally with the quality of the memory. We then show that for contextual fear conditioning and Morris water maze learning, increased feedforward inhibition connectivity by hippocampal mossy fibres has a critical role for the precision of the memory and the learned behaviour. In the absence of mossy fibre long-term potentiation in Rab3a(-/-) mice, c-Fos ensemble reorganization and feedforward inhibition growth were both absent in CA3 upon learning, and the memory was imprecise. By contrast, in the absence of adducin 2 (Add2; also known as beta-adducin) c-Fos reorganization was normal, but feedforward inhibition growth was abolished. In parallel, c-Fos ensembles in CA3 were greatly enlarged, and the memory was imprecise. Feedforward inhibition growth and memory precision were both rescued by re-expression of Add2 specifically in hippocampal mossy fibres. These results establish a causal relationship between learning-related increases in the numbers of defined synapses and the precision of learning and memory in the adult. The results further relate plasticity and feedforward inhibition growth at hippocampal mossy fibres to the precision of hippocampus-dependent memories.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ruediger, Sarah -- Vittori, Claudia -- Bednarek, Ewa -- Genoud, Christel -- Strata, Piergiorgio -- Sacchetti, Benedetto -- Caroni, Pico -- England -- Nature. 2011 May 26;473(7348):514-8. doi: 10.1038/nature09946. Epub 2011 May 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Friedrich Miescher Institute, Maulbeerstrasse 66, CH-4058 Basel, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21532590" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Cerebellum/physiology ; Conditioning (Psychology)/physiology ; Fear/physiology ; Feedback, Physiological/*physiology ; Hippocampus/*cytology/*physiology ; Maze Learning/physiology ; Memory/*physiology ; Mice ; Microfilament Proteins/deficiency/genetics/metabolism ; Models, Neurological ; Mossy Fibers, Hippocampal/physiology ; Neural Inhibition/*physiology ; Neuronal Plasticity/physiology ; Proto-Oncogene Proteins c-fos/metabolism ; Pseudopodia/metabolism ; Pyramidal Cells/cytology/metabolism ; Synapses/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 4
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    Parvalbumin-expressing basket-cell network plasticity induced by experience regulates adult learning (2013)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2013-12-18
    Description: Learning and memory processes can be influenced by recent experience, but the mechanisms involved are poorly understood. Enhanced plasticity during critical periods of early life is linked to differentiating parvalbumin (PV)-interneuron networks, suggesting that recent experience may modulate learning by targeting the differentiation state of PV neurons in the adult. Here we show that environmental enrichment and Pavlovian contextual fear conditioning induce opposite, sustained and reversible hippocampal PV-network configurations in adult mice. Specifically, enrichment promotes the emergence of large fractions of low-differentiation (low PV and GAD67 expression) basket cells with low excitatory-to-inhibitory synaptic-density ratios, whereas fear conditioning leads to large fractions of high-differentiation (high PV and GAD67 expression) basket cells with high excitatory-to-inhibitory synaptic-density ratios. Pharmacogenetic inhibition or activation of PV neurons was sufficient to induce such opposite low-PV-network or high-PV-network configurations, respectively. The low-PV-network configuration enhanced structural synaptic plasticity, and memory consolidation and retrieval, whereas these were reduced by the high-PV-network configuration. We then show that maze navigation learning induces a hippocampal low-PV-network configuration paralleled by enhanced memory and structural synaptic plasticity throughout training, followed by a shift to a high-PV-network configuration after learning completion. The shift to a low-PV-network configuration specifically involved increased vasoactive intestinal polypeptide (VIP)-positive GABAergic boutons and synaptic transmission onto PV neurons. Closely comparable low- and high-PV-network configurations involving VIP boutons were specifically induced in primary motor cortex upon rotarod motor learning. These results uncover a network plasticity mechanism induced after learning through VIP-PV microcircuit modulation, and involving large, sustained and reversible shifts in the configuration of PV basket-cell networks in the adult. This novel form of experience-related plasticity in the adult modulates memory consolidation, retrieval and learning, and might be harnessed for therapeutic strategies to promote cognitive enhancement and neuroprotection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Donato, Flavio -- Rompani, Santiago Belluco -- Caroni, Pico -- England -- Nature. 2013 Dec 12;504(7479):272-6. doi: 10.1038/nature12866.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Friedrich Miescher Institut, Maulbeerstrasse 66, CH-4058 Basel, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24336286" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biomedical Enhancement ; Cell Differentiation ; Conditioning, Classical ; Fear ; GABAergic Neurons/metabolism ; Glutamate Decarboxylase/metabolism ; Hippocampus/*cytology/*physiology ; Interneurons/*metabolism ; Learning/*physiology ; Male ; Maze Learning/physiology ; Memory/physiology ; Mice ; Neuronal Plasticity/*physiology ; Parvalbumins/*metabolism ; Synaptic Transmission ; Vasoactive Intestinal Peptide/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 5
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    CLK2 inhibition ameliorates autistic features associated with SHANK3 deficiency (2016)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2016-02-06
    Description: SH3 and multiple ankyrin repeat domains 3 (SHANK3) haploinsufficiency is causative for the neurological features of Phelan-McDermid syndrome (PMDS), including a high risk of autism spectrum disorder (ASD). We used unbiased, quantitative proteomics to identify changes in the phosphoproteome of Shank3-deficient neurons. Down-regulation of protein kinase B (PKB/Akt)-mammalian target of rapamycin complex 1 (mTORC1) signaling resulted from enhanced phosphorylation and activation of serine/threonine protein phosphatase 2A (PP2A) regulatory subunit, B56beta, due to increased steady-state levels of its kinase, Cdc2-like kinase 2 (CLK2). Pharmacological and genetic activation of Akt or inhibition of CLK2 relieved synaptic deficits in Shank3-deficient and PMDS patient-derived neurons. CLK2 inhibition also restored normal sociability in a Shank3-deficient mouse model. Our study thereby provides a novel mechanistic and potentially therapeutic understanding of deregulated signaling downstream of Shank3 deficiency.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bidinosti, Michael -- Botta, Paolo -- Kruttner, Sebastian -- Proenca, Catia C -- Stoehr, Natacha -- Bernhard, Mario -- Fruh, Isabelle -- Mueller, Matthias -- Bonenfant, Debora -- Voshol, Hans -- Carbone, Walter -- Neal, Sarah J -- McTighe, Stephanie M -- Roma, Guglielmo -- Dolmetsch, Ricardo E -- Porter, Jeffrey A -- Caroni, Pico -- Bouwmeester, Tewis -- Luthi, Andreas -- Galimberti, Ivan -- New York, N.Y. -- Science. 2016 Mar 11;351(6278):1199-203. doi: 10.1126/science.aad5487. Epub 2016 Feb 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Developmental Molecular Pathways, Novartis Institutes for Biomedical Research, Basel, Switzerland. ; Friedrich Miescher Institute, Basel, Switzerland. ; Analytical Sciences and Imaging, Novartis Institutes for Biomedical Research, Basel, Switzerland. ; Neuroscience, Novartis Institutes for Biomedical Research, Cambridge, USA. ; Developmental Molecular Pathways, Novartis Institutes for Biomedical Research, Basel, Switzerland. ivan.galimberti@novartis.com.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26847545" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Autism Spectrum Disorder/*drug therapy/enzymology/genetics ; Chromosome Deletion ; Chromosome Disorders/genetics ; Chromosomes, Human, Pair 22/genetics ; Disease Models, Animal ; Down-Regulation ; Gene Knockdown Techniques ; Humans ; Insulin-Like Growth Factor I/metabolism ; Mice ; Molecular Sequence Data ; Multiprotein Complexes/metabolism ; Nerve Tissue Proteins/*genetics ; Neurons/enzymology ; Phosphorylation ; Protein Phosphatase 2/metabolism ; Protein-Serine-Threonine Kinases/*antagonists & inhibitors/metabolism ; Protein-Tyrosine Kinases/*antagonists & inhibitors/metabolism ; Proteomics ; Proto-Oncogene Proteins c-akt/genetics/metabolism ; Rats ; Signal Transduction ; TOR Serine-Threonine Kinases/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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  • 6
    Electronic Resource
    Electronic Resource
    Ca^2^+ transport mediated by a synthetic neutral Ca^2^+-ionophore in biological membranes
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 470 (1977), S. 437-445 
    Details
    ISSN: 0005-2736
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0005-2736(77)90134-1
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  • 7
    Electronic Resource
    Electronic Resource
    Studies on heart sarcolemma: vesicles of opposite orientation and the effect of ATP on the Na^+/Ca^2^+ exchanger
    Amsterdam : Elsevier
    FEBS Letters 126 (1981), S. 74-76 
    Details
    ISSN: 0014-5793
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(81)81036-8
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  • 8
    Electronic Resource
    Electronic Resource
    Codistribution of neurite growth inhibitors and oligodendrocytes in rat CNS: Appearance follows nerve fiber growth and precedes myelination
    Amsterdam : Elsevier
    Developmental Biology 136 (1989), S. 287-295 
    Details
    ISSN: 0012-1606
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0012-1606(89)90255-8
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  • 9
    Electronic Resource
    Electronic Resource
    Separate pathways for Ca^2^+ uptake and release in liver mitochondria
    Amsterdam : Elsevier
    FEBS Letters 96 (1978), S. 339-342 
    Details
    ISSN: 0014-5793
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(78)80431-1
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  • 10
    Electronic Resource
    Electronic Resource
    The cardiotoxic antibiotic doxorubicin inhibits the Na^+/Ca^2^+ exchange of dog heart sarcolemmal vesicles
    Amsterdam : Elsevier
    FEBS Letters 130 (1981), S. 184-186 
    Details
    ISSN: 0014-5793
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(81)81115-5
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