0000000000244033

AUTHOR

Susann Ludewig

showing 3 related works from this author

Lack of APP and APLP2 in GABAergic Forebrain Neurons Impairs Synaptic Plasticity and Cognition.

2020

AbstractAmyloid-β precursor protein (APP) is central to the pathogenesis of Alzheimer’s disease, yet its physiological functions remain incompletely understood. Previous studies had indicated important synaptic functions of APP and the closely related homologue APLP2 in excitatory forebrain neurons for spine density, synaptic plasticity, and behavior. Here, we show that APP is also widely expressed in several interneuron subtypes, both in hippocampus and cortex. To address the functional role of APP in inhibitory neurons, we generated mice with a conditional APP/APLP2 double knockout (cDKO) in GABAergic forebrain neurons using DlxCre mice. These DlxCre cDKO mice exhibit cognitive deficits i…

InterneuronCognitive NeuroscienceLong-Term PotentiationSpatial LearningHippocampusAction PotentialsInhibitory postsynaptic potentialHippocampusNesting Behavior03 medical and health sciencesCellular and Molecular NeuroscienceAmyloid beta-Protein PrecursorMice0302 clinical medicineCognitionProsencephalonAmyloid precursor proteinmedicineAnimalsGABAergic NeuronsCA1 Region Hippocampal030304 developmental biologySpatial MemoryMice Knockout0303 health sciencesNeuronal PlasticitybiologyPyramidal CellsExcitatory Postsynaptic PotentialsLong-term potentiationmedicine.anatomical_structurenervous systemInhibitory Postsynaptic PotentialsSynaptic plasticityForebrainExcitatory postsynaptic potentialbiology.proteinNeuroscience030217 neurology & neurosurgeryCerebral cortex (New York, N.Y. : 1991)
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Loss of all three APP family members during development impairs synaptic function and plasticity, disrupts learning, and causes an autism-like phenot…

2021

The key role of APP for Alzheimer pathogenesis is well established. However, perinatal lethality of germline knockout mice lacking the entire APP family has so far precluded the analysis of its physiological functions for the developing and adult brain. Here, we generated conditional APP/APLP1/APLP2 triple KO (cTKO) mice lacking the APP family in excitatory forebrain neurons from embryonic day 11.5 onwards. NexCre cTKO mice showed altered brain morphology with agenesis of the corpus callosum and disrupted hippocampal lamination. Further, NexCre cTKOs revealed reduced basal synaptic transmission and drastically reduced long-term potentiation that was associated with reduced dendritic length …

Male10017 Institute of AnatomyLong-Term PotentiationHippocampal formationSynaptic TransmissionAmyloid beta-Protein Precursor0302 clinical medicine2400 General Immunology and MicrobiologyAmyloid precursor proteinMolecular Biology of DiseaseAutism spectrum disorderMice KnockoutNeurons0303 health sciencesbiologyBehavior AnimalGeneral NeuroscienceBrain2800 General NeuroscienceLong-term potentiationArticlesPhenotype10076 Center for Integrative Human PhysiologyKnockout mouseFemalelearning and memory610 Medicine & healthGeneral Biochemistry Genetics and Molecular BiologyArticle03 medical and health sciencesProsencephalon1300 General Biochemistry Genetics and Molecular Biologymental disorders1312 Molecular BiologyAnimalsLearningAPLP1Autistic DisorderSocial BehaviorMolecular BiologyAPLP2CA1 Region Hippocampal030304 developmental biologysynaptic plasticityGeneral Immunology and MicrobiologyAmyloid precursor proteinSynaptic plasticityForebrainSynapsesbiology.proteinAlzheimer570 Life sciences; biologyNeuroscience030217 neurology & neurosurgeryNeuroscienceThe EMBO journal
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Neural stem cell lineage-specific cannabinoid type-1 receptor regulates neurogenesis and plasticity in the adult mouse hippocampus

2018

Abstract Neural stem cells (NSCs) in the adult mouse hippocampus occur in a specific neurogenic niche, where a multitude of extracellular signaling molecules converges to regulate NSC proliferation as well as fate and functional integration. However, the underlying mechanisms how NSCs react to extrinsic signals and convert them to intracellular responses still remains elusive. NSCs contain a functional endocannabinoid system, including the cannabinoid type-1 receptor (CB1). To decipher whether CB1 regulates adult neurogenesis directly or indirectly in vivo, we performed NSC-specific conditional inactivation of CB1 by using triple-transgenic mice. Here, we show that lack of CB1 in NSCs is su…

Male0301 basic medicineCell signalingCannabinoid receptorNeurogenesisCognitive NeuroscienceLong-Term PotentiationMice Transgenicmouse hippocampus ; neural stem cells ; neurogenesis-dependent behavior ; CB1 ; adult neurogenesisHippocampal formationBiologyHippocampus03 medical and health sciencesCellular and Molecular Neurosciencemouse hippocampus0302 clinical medicineNeural Stem CellsReceptor Cannabinoid CB1Animalsreproductive and urinary physiologySpatial MemoryBehavior AnimalNeurogenesisLong-term potentiationOriginal ArticlesCB1Endocannabinoid systemneurogenesis-dependent behaviorNeural stem cellCell biologyadult neurogenesisMice Inbred C57BL030104 developmental biologynervous systemlipids (amino acids peptides and proteins)biological phenomena cell phenomena and immunityStem cell030217 neurology & neurosurgeryCerebral Cortex
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