Burkhardt, Susanne

[["dc.bibliographiccitation.firstpage","135"],["dc.bibliographiccitation.journal","Neurobiology of Disease"],["dc.bibliographiccitation.lastpage","143"],["dc.bibliographiccitation.volume","62"],["dc.contributor.author","Agbemenyah, Hope Yao"],["dc.contributor.author","Agis-Balboa, Roberto Carlos"],["dc.contributor.author","Burkhardt, Susanne"],["dc.contributor.author","Delalle, Ivana"],["dc.contributor.author","Fischer, Andre"],["dc.date.accessioned","2017-09-07T11:46:53Z"],["dc.date.available","2017-09-07T11:46:53Z"],["dc.date.issued","2014"],["dc.description.abstract","Alzheimer's disease (AD) is the most common form of dementia in the elderly but effective therapeutic strategies to treat AD are not yet available. This is also due to the fact that the pathological mechanisms that drive the pathogenesis of sporadic AD are still not sufficiently understood and may differ on the individual level. Several risk factors such as altered insulin-like peptide (ILP) signaling have been linked to AD and modulating the ILP system has been discussed as a potential therapeutic avenue. Here we show that insulin-like growth factor binding protein 7 (IGFBP7), a protein that attenuates the function of ILPs, is up-regulated in the brains of AD patients and in a mouse model for AD via a process that involves altered DNA-methylation and coincides with decreased ILP signaling. Mimicking the AD-situation in wild type mice, by increasing hippocampal IGFBP7 levels leads to impaired memory consolidation. Consistently, inhibiting IGFBP7 function in mice that develop AD-like memory impairment reinstates associative learning behavior. These data suggest that IGFBP7 is a critical regulator of memory consolidation and might be used as a biomarker for AD. Targeting IGFBP7 could be a novel therapeutic avenue for the treatment of AD patients."],["dc.identifier.doi","10.1016/j.nbd.2013.09.011"],["dc.identifier.gro","3142193"],["dc.identifier.isi","000330553600013"],["dc.identifier.pmid","24075854"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5566"],["dc.language.iso","en"],["dc.notes.intern","WoS Import 2017-03-10"],["dc.notes.status","final"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.eissn","1095-953X"],["dc.relation.issn","0969-9961"],["dc.title","Insulin growth factor binding protein 7 is a novel target to treat dementia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3452"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","The Journal of neuroscience"],["dc.bibliographiccitation.lastpage","3464"],["dc.bibliographiccitation.volume","33"],["dc.contributor.author","Kerimoglu, Cemil"],["dc.contributor.author","Agis-Balboa, Roberto Carlos"],["dc.contributor.author","Kranz, Andrea"],["dc.contributor.author","Stilling, Roman Manuel"],["dc.contributor.author","Bahari-Javan, Sanaz"],["dc.contributor.author","Benito-Garagorri, Eva"],["dc.contributor.author","Halder, Rashi"],["dc.contributor.author","Burkhardt, Susanne"],["dc.contributor.author","Stewart, Adrian Francis"],["dc.contributor.author","Fischer, Andre"],["dc.date.accessioned","2017-09-07T11:47:49Z"],["dc.date.available","2017-09-07T11:47:49Z"],["dc.date.issued","2013"],["dc.description.abstract","The consolidation of long-term memories requires differential gene expression. Recent research has suggested that dynamic changes in chromatin structure play a role in regulating the gene expression program linked to memory formation. The contribution of histone methylation, an important regulatory mechanism of chromatin plasticity that is mediated by the counteracting activity of histone-methyltransferases and histone-demethylases, is, however, not well understood. Here we show that mice lacking the histone-methyltransferase myeloid/lymphoid or mixed-lineage leukemia 2 (mll2/kmt2b) gene in adult forebrain excitatory neurons display impaired hippocampus-dependent memory function. Consistent with the role of KMT2B in gene-activation DNA microarray analysis revealed that 152 genes were downregulated in the hippocampal dentate gyrus region of mice lacking kmt2b. Downregulated plasticity genes showed a specific deficit in histone 3 lysine 4 di-and trimethylation, while histone 3 lysine 4 monomethylation was not affected. Our data demonstrates that KMT2B mediates hippocampal histone 3 lysine 4 di-and trimethylation and is a critical player for memory formation."],["dc.identifier.doi","10.1523/JNEUROSCI.3356-12.2013"],["dc.identifier.gro","3142390"],["dc.identifier.isi","000315195700021"],["dc.identifier.pmid","23426673"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7752"],["dc.language.iso","en"],["dc.notes.intern","WoS Import 2017-03-10"],["dc.notes.status","final"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","0270-6474"],["dc.title","Histone-Methyltransferase MLL2 (KMT2B) Is Required for Memory Formation in Mice"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","753"],["dc.bibliographiccitation.issue","5979"],["dc.bibliographiccitation.journal","Science"],["dc.bibliographiccitation.lastpage","756"],["dc.bibliographiccitation.volume","328"],["dc.contributor.author","Peleg, Shahaf"],["dc.contributor.author","Sananbenesi, Farahnaz"],["dc.contributor.author","Zovoilis, Athanasios"],["dc.contributor.author","Burkhardt, Susanne"],["dc.contributor.author","Bahari-Javan, Sanaz"],["dc.contributor.author","Agis-Balboa, Roberto Carlos"],["dc.contributor.author","Cota, Perla"],["dc.contributor.author","Wittnam, Jessica"],["dc.contributor.author","Opitz, Lennart"],["dc.contributor.author","Salinas-Riester, Gabriela"],["dc.contributor.author","Dettenhofer, Markus"],["dc.contributor.author","Kang, Hui"],["dc.contributor.author","Farinelli, Laurent"],["dc.contributor.author","Chen, Wei"],["dc.contributor.author","Fischer, Andre"],["dc.contributor.author","Doering, Aaron"],["dc.date.accessioned","2017-09-07T11:46:04Z"],["dc.date.available","2017-09-07T11:46:04Z"],["dc.date.issued","2010"],["dc.description.abstract","As the human life span increases, the number of people suffering from cognitive decline is rising dramatically. The mechanisms underlying age-associated memory impairment are, however, not understood. Here we show that memory disturbances in the aging brain of the mouse are associated with altered hippocampal chromatin plasticity. During learning, aged mice display a specific deregulation of histone H4 lysine 12 (H4K12) acetylation and fail to initiate a hippocampal gene expression program associated with memory consolidation. Restoration of physiological H4K12 acetylation reinstates the expression of learning-induced genes and leads to the recovery of cognitive abilities. Our data suggest that deregulated H4K12 acetylation may represent an early biomarker of an impaired genome-environment interaction in the aging mouse brain."],["dc.identifier.doi","10.1126/science.1186088"],["dc.identifier.gro","3142928"],["dc.identifier.isi","000277357100040"],["dc.identifier.pmid","20448184"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/386"],["dc.language.iso","en"],["dc.notes.intern","WoS Import 2017-03-10"],["dc.notes.status","final"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","0036-8075"],["dc.title","Altered Histone Acetylation Is Associated with Age-Dependent Memory Impairment in Mice"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","538"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Cell Reports"],["dc.bibliographiccitation.lastpage","548"],["dc.bibliographiccitation.volume","20"],["dc.contributor.author","Kerimoglu, Cemil"],["dc.contributor.author","Fischer, André"],["dc.contributor.author","Sakib, M Sadman"],["dc.contributor.author","Jain, Gaurav"],["dc.contributor.author","Benito-Garagorri, Eva"],["dc.contributor.author","Burkhardt, Susanne"],["dc.contributor.author","Capece, Vincenzo"],["dc.contributor.author","Kaurani, Lalit"],["dc.contributor.author","Halder, Rashi"],["dc.contributor.author","Agis-Balboa, Roberto Carlos"],["dc.contributor.author","Stilling, Roman Manuel"],["dc.contributor.author","Urbanke, Hendrik"],["dc.contributor.author","Kranz, Andrea"],["dc.contributor.author","Stewart, Adrian Francis"],["dc.date.accessioned","2018-01-09T14:45:29Z"],["dc.date.available","2018-01-09T14:45:29Z"],["dc.date.issued","2017-07-18"],["dc.description.abstract","Kmt2a and Kmt2b are H3K4 methyltransferases of the Set1/Trithorax class. We have recently shown the importance of Kmt2b for learning and memory. Here, we report that Kmt2a is also important in memory formation. We compare the decrease in H3K4 methylation and de-regulation of gene expression in hippocampal neurons of mice with knockdown of either Kmt2a or Kmt2b. Kmt2a and Kmt2b control largely distinct genomic regions and different molecular pathways linked to neuronal plasticity. Finally, we show that the decrease in H3K4 methylation resulting from Kmt2a knockdown partially recapitulates the pattern previously reported in CK-p25 mice, a model for neurodegeneration and memory impairment. Our findings point to the distinct functions of even closely related histone-modifying enzymes and provide essential insight for the development of more efficient and specific epigenetic therapies against brain diseases."],["dc.identifier.doi","10.1016/j.celrep.2017.06.072"],["dc.identifier.pmid","28723559"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11606"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.eissn","2211-1247"],["dc.title","KMT2A and KMT2B Mediate Memory Function by Affecting Distinct Genomic Regions"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","4071"],["dc.bibliographiccitation.issue","19"],["dc.bibliographiccitation.journal","EMBO Journal"],["dc.bibliographiccitation.lastpage","4083"],["dc.bibliographiccitation.volume","30"],["dc.contributor.author","Agis-Balboa, Roberto Carlos"],["dc.contributor.author","Arcos-Diaz, Dario"],["dc.contributor.author","Wittnam, Jessica"],["dc.contributor.author","Govindarajan, Nambirajan"],["dc.contributor.author","Blom, Kim"],["dc.contributor.author","Burkhardt, Susanne"],["dc.contributor.author","Haladyniak, Ulla"],["dc.contributor.author","Agbemenyah, Hope Yao"],["dc.contributor.author","Zovoilis, Athanasios"],["dc.contributor.author","Salinas-Riester, Gabriela"],["dc.contributor.author","Opitz, Lennart"],["dc.contributor.author","Sananbenesi, Farahnaz"],["dc.contributor.author","Fischer, Andre"],["dc.date.accessioned","2017-09-07T11:43:23Z"],["dc.date.available","2017-09-07T11:43:23Z"],["dc.date.issued","2011"],["dc.description.abstract","Extinction learning refers to the phenomenon that a previously learned response to an environmental stimulus, for example, the expression of an aversive behaviour upon exposure to a specific context, is reduced when the stimulus is repeatedly presented in the absence of a previously paired aversive event. Extinction of fear memories has been implicated with the treatment of anxiety disease but the molecular processes that underlie fear extinction are only beginning to emerge. Here, we show that fear extinction initiates upregulation of hippocampal insulin-growth factor 2 (Igf2) and downregulation of insulin-growth factor binding protein 7 (Igfbp7). In line with this observation, we demonstrate that IGF2 facilitates fear extinction, while IGFBP7 impairs fear extinction in an IGF2-dependent manner. Furthermore, we identify one cellular substrate of altered IGF2 signalling during fear extinction. To this end, we show that fear extinctioninduced IGF2/IGFBP7 signalling promotes the survival of 17-19-day-old newborn hippocampal neurons. In conclusion, our data suggest that therapeutic strategies that enhance IGF2 signalling and adult neurogenesis might be suitable to treat disease linked to excessive fear memory."],["dc.identifier.doi","10.1038/emboj.2011.293"],["dc.identifier.gro","3142650"],["dc.identifier.isi","000295967300019"],["dc.identifier.pmid","21873981"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/77"],["dc.language.iso","en"],["dc.notes.intern","WoS Import 2017-03-10"],["dc.notes.status","final"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","0261-4189"],["dc.title","A hippocampal insulin-growth factor 2 pathway regulates the extinction of fear memories"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","4299"],["dc.bibliographiccitation.issue","20"],["dc.bibliographiccitation.journal","EMBO Journal"],["dc.bibliographiccitation.lastpage","4308"],["dc.bibliographiccitation.volume","30"],["dc.contributor.author","Zovoilis, Athanasios"],["dc.contributor.author","Agbemenyah, Hope Yao"],["dc.contributor.author","Agis-Balboa, Roberto Carlos"],["dc.contributor.author","Stilling, Roman Manuel"],["dc.contributor.author","Edbauer, Dieter"],["dc.contributor.author","Rao, Pooja"],["dc.contributor.author","Farinelli, Laurent"],["dc.contributor.author","Delalle, Ivana"],["dc.contributor.author","Schmitt, Andrea"],["dc.contributor.author","Falkai, Peter"],["dc.contributor.author","Bahari-Javan, Sanaz"],["dc.contributor.author","Burkhardt, Susanne"],["dc.contributor.author","Sananbenesi, Farahnaz"],["dc.contributor.author","Fischer, Andre"],["dc.date.accessioned","2017-09-07T11:43:21Z"],["dc.date.available","2017-09-07T11:43:21Z"],["dc.date.issued","2011"],["dc.description.abstract","MicroRNAs are key regulators of transcriptome plasticity and have been implicated with the pathogenesis of brain diseases. Here, we employed massive parallel sequencing and provide, at an unprecedented depth, the complete and quantitative miRNAome of the mouse hippocampus, the prime target of neurodegenerative diseases such as Alzheimer's disease (AD). Using integrative genetics, we identify miR-34c as a negative constraint of memory consolidation and show that miR-34c levels are elevated in the hippocampus of AD patients and corresponding mouse models. In line with this, targeting miR-34 seed rescues learning ability in these mouse models. Our data suggest that miR-34c could be a marker for the onset of cognitive disturbances linked to AD and indicate that targeting miR-34c could be a suitable therapy."],["dc.identifier.doi","10.1038/emboj.2011.327"],["dc.identifier.gro","3142641"],["dc.identifier.isi","000296715800017"],["dc.identifier.pmid","21946562"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/67"],["dc.language.iso","en"],["dc.notes.intern","WoS Import 2017-03-10"],["dc.notes.status","final"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","0261-4189"],["dc.title","MicroRNA-34c is a novel target to treat dementias"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]