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  1. Article ; Online: Dementia risk variants - hunting needles in a haystack.

    Oatman, Stephanie R / Ertekin-Taner, Nilüfer

    Nature reviews. Neurology

    2022  Volume 18, Issue 12, Page(s) 705–706

    MeSH term(s) Humans ; Dementia/epidemiology
    Language English
    Publishing date 2022-10-31
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 2491514-2
    ISSN 1759-4766 ; 1759-4758
    ISSN (online) 1759-4766
    ISSN 1759-4758
    DOI 10.1038/s41582-022-00739-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Identifying therapeutic targets for Alzheimer's disease with big data.

    Ertekin-Taner, Nilüfer

    Neurodegenerative disease management

    2017  Volume 7, Issue 2, Page(s) 101–105

    Abstract: Nilüfer Ertekin-Taner is a Professor of Neuroscience and Neurology at the Mayo Clinic, Jacksonville, FL, USA. A neurogeneticist and board-certified behavioral neurologist, she received her medical degree from Hacettepe University Medical School in Ankara, ...

    Abstract Nilüfer Ertekin-Taner is a Professor of Neuroscience and Neurology at the Mayo Clinic, Jacksonville, FL, USA. A neurogeneticist and board-certified behavioral neurologist, she received her medical degree from Hacettepe University Medical School in Ankara, Turkey and her doctorate degree in Molecular Neuroscience from Mayo Graduate School. She completed her residency training in the Department of Neurology at Mayo Clinic in Rochester (MN, USA) and fellowship in Behavioral Neurology at Mayo Clinic in Jacksonville. Her laboratory aims to discover and characterize genetic factors underlying the complex genetics of Alzheimer's disease (AD) and related neurodegenerative conditions. Her earlier work contributed to the establishment of the endophenotype approach in genetic studies of AD and pioneered the use of amyloid β peptide levels as an endophenotype in AD genetic research. Her laboratory currently uses biological traits such as gene expression levels and cognitive scores and leverages combined genome, transcriptome and epigenetic data to uncover genetic risk factors for neurodegenerative conditions. She is the principal investigator of numerous NIH and foundation grants. She leads multiple collaborative projects aimed at gene and pathway discoveries in AD and other neurodegenerative diseases, as a part of the NIH initiatives Accelerating Medicines Partnership AD (AMP-AD) and Molecular Mechanisms of the Vascular Etiology of AD (M
    Language English
    Publishing date 2017-04
    Publishing country England
    Document type Journal Article
    ISSN 1758-2032
    ISSN (online) 1758-2032
    DOI 10.2217/nmt-2017-0008
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Alzheimer disease: the quest for Alzheimer disease genes--focus on CSF tau.

    Ertekin-Taner, Nilüfer

    Nature reviews. Neurology

    2013  Volume 9, Issue 7, Page(s) 368–370

    MeSH term(s) Alzheimer Disease/cerebrospinal fluid ; Alzheimer Disease/genetics ; Genetic Loci ; Genome-Wide Association Study ; Humans ; tau Proteins/cerebrospinal fluid
    Chemical Substances tau Proteins
    Language English
    Publishing date 2013-06-11
    Publishing country England
    Document type News ; Research Support, N.I.H., Extramural
    ZDB-ID 2491514-2
    ISSN 1759-4766 ; 1759-4758
    ISSN (online) 1759-4766
    ISSN 1759-4758
    DOI 10.1038/nrneurol.2013.117
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Gene expression endophenotypes

    Ertekin-Taner Nilüfer

    Molecular Neurodegeneration, Vol 6, Iss 1, p

    a novel approach for gene discovery in Alzheimer's disease

    2011  Volume 31

    Abstract: Abstract Uncovering the underlying genetic component of any disease is key to the understanding of its pathophysiology and may open new avenues for development of therapeutic strategies and biomarkers. In the past several years, there has been an ... ...

    Abstract Abstract Uncovering the underlying genetic component of any disease is key to the understanding of its pathophysiology and may open new avenues for development of therapeutic strategies and biomarkers. In the past several years, there has been an explosion of genome-wide association studies (GWAS) resulting in the discovery of novel candidate genes conferring risk for complex diseases, including neurodegenerative diseases. Despite this success, there still remains a substantial genetic component for many complex traits and conditions that is unexplained by the GWAS findings. Additionally, in many cases, the mechanism of action of the newly discovered disease risk variants is not inherently obvious. Furthermore, a genetic region with multiple genes may be identified via GWAS, making it difficult to discern the true disease risk gene. Several alternative approaches are proposed to overcome these potential shortcomings of GWAS, including the use of quantitative, biologically relevant phenotypes. Gene expression levels represent an important class of endophenotypes. Genetic linkage and association studies that utilize gene expression levels as endophenotypes determined that the expression levels of many genes are under genetic influence. This led to the postulate that there may exist many genetic variants that confer disease risk via modifying gene expression levels. Results from the handful of genetic studies which assess gene expression level endophenotypes in conjunction with disease risk suggest that this combined phenotype approach may both increase the power for gene discovery and lead to an enhanced understanding of their mode of action. This review summarizes the evidence in support of gene expression levels as promising endophenotypes in the discovery and characterization of novel candidate genes for complex diseases, which may also represent a novel approach in the genetic studies of Alzheimer's and other neurodegenerative diseases.
    Keywords Neurology. Diseases of the nervous system ; RC346-429 ; Neurosciences. Biological psychiatry. Neuropsychiatry ; RC321-571 ; Internal medicine ; RC31-1245 ; Medicine ; R ; DOAJ:Neurology ; DOAJ:Medicine (General) ; DOAJ:Health Sciences
    Subject code 610
    Language English
    Publishing date 2011-05-01T00:00:00Z
    Publisher BioMed Central
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Humanin variant P3S is associated with longevity in APOE4 carriers and resists APOE4-induced brain pathology.

    Miller, Brendan / Kim, Su-Jeong / Cao, Kevin / Mehta, Hemal H / Thumaty, Neehar / Kumagai, Hiroshi / Iida, Tomomitsu / McGill, Cassandra / Pike, Christian J / Nurmakova, Kamila / Levine, Zachary A / Sullivan, Patrick M / Yen, Kelvin / Ertekin-Taner, Nilüfer / Atzmon, Gil / Barzilai, Nir / Cohen, Pinchas

    Aging cell

    2024  , Page(s) e14153

    Abstract: The APOE4 allele is recognized as a significant genetic risk factor to Alzheimer's disease (AD) and influences longevity. Nonetheless, some APOE4 carriers exhibit resistance to AD even in advanced age. Humanin, a mitochondrial-derived peptide comprising ... ...

    Abstract The APOE4 allele is recognized as a significant genetic risk factor to Alzheimer's disease (AD) and influences longevity. Nonetheless, some APOE4 carriers exhibit resistance to AD even in advanced age. Humanin, a mitochondrial-derived peptide comprising 24 amino acids, has variants linked to cognitive resilience and longevity. Our research uncovered a unique humanin variant, P3S, specifically enriched in centenarians with the APOE4 allele. Through in silico analyses and subsequent experimental validation, we demonstrated a strong affinity between humanin P3S and APOE4. Utilizing an APOE4-centric mouse model of amyloidosis (APP/PS1/APOE4), we observed that humanin P3S significantly attenuated brain amyloid-beta accumulation compared to the wild-type humanin. Transcriptomic assessments of mice treated with humanin P3S highlighted its potential mechanism involving the enhancement of amyloid beta phagocytosis. Additionally, in vitro studies corroborated humanin P3S's efficacy in promoting amyloid-beta clearance. Notably, in the temporal cortex of APOE4 carriers, humanin expression is correlated with genes associated with phagocytosis. Our findings suggest a role of the rare humanin variant P3S, especially prevalent among individuals of Ashkenazi descent, in mitigating amyloid beta pathology and facilitating phagocytosis in APOE4-linked amyloidosis, underscoring its significance in longevity and cognitive health among APOE4 carriers.
    Language English
    Publishing date 2024-03-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 2113083-8
    ISSN 1474-9726 ; 1474-9718
    ISSN (online) 1474-9726
    ISSN 1474-9718
    DOI 10.1111/acel.14153
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Rare genetic variation in Fibronectin 1 (

    Bhattarai, Prabesh / Gunasekaran, Tamil Iniyan / Reyes-Dumeyer, Dolly / Jülich, Dörthe / Tayran, Hüseyin / Yilmaz, Elanur / Flaherty, Delaney / Lantigua, Rafael / Medrano, Martin / Rivera, Diones / Recio, Patricia / Ertekin-Taner, Nilüfer / Teich, Andrew F / Dickson, Dennis W / Holley, Scott / Mayeux, Richard / Kizil, Caghan / Vardarajan, Badri N

    bioRxiv : the preprint server for biology

    2024  

    Abstract: The risk of developing Alzheimer's disease (AD) significantly increases in individuals carrying ... ...

    Abstract The risk of developing Alzheimer's disease (AD) significantly increases in individuals carrying the
    Language English
    Publishing date 2024-01-02
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2024.01.02.573895
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Comparative brain metabolomics reveals shared and distinct metabolic alterations in Alzheimer's disease and progressive supranuclear palsy.

    Batra, Richa / Krumsiek, Jan / Wang, Xue / Allen, Mariet / Blach, Colette / Kastenmüller, Gabi / Arnold, Matthias / Ertekin-Taner, Nilüfer / Kaddurah-Daouk, Rima F

    medRxiv : the preprint server for health sciences

    2023  

    Abstract: Metabolic dysregulation is a hallmark of neurodegenerative diseases, including Alzheimer's disease (AD) and progressive supranuclear palsy (PSP). While metabolic dysregulation is a common link between these two tauopathies, a comprehensive brain ... ...

    Abstract Metabolic dysregulation is a hallmark of neurodegenerative diseases, including Alzheimer's disease (AD) and progressive supranuclear palsy (PSP). While metabolic dysregulation is a common link between these two tauopathies, a comprehensive brain metabolic comparison of the diseases has not yet been performed. We analyzed 342 postmortem brain samples from the Mayo Clinic Brain Bank and examined 658 metabolites in the cerebellar cortex and the temporal cortex between the two tauopathies. Our findings indicate that both diseases display oxidative stress associated with lipid metabolism, mitochondrial dysfunction linked to lysine metabolism, and an indication of tau-induced polyamine stress response. However, specific to AD, we detected glutathione-related neuroinflammation, deregulations of enzymes tied to purines, and cognitive deficits associated with vitamin B. Taken together, our findings underscore vast alterations in the brain's metabolome, illuminating shared neurodegenerative pathways and disease-specific traits in AD and PSP.
    Language English
    Publishing date 2023-07-27
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.07.25.23293055
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Titration-based normalization of antibody amount improves consistency of ChIP-seq experiments.

    Caride, Ariel / Jang, Jin Sung / Shi, Geng-Xian / Lenz, Sam / Zhong, Jian / Kim, Kwan Hyun / Allen, Mariet / Robertson, Keith D / Farrugia, Gianrico / Ordog, Tamas / Ertekin-Taner, Nilüfer / Lee, Jeong-Heon

    BMC genomics

    2023  Volume 24, Issue 1, Page(s) 171

    Abstract: Chromatin immunoprecipitation (ChIP) is an antibody-based approach that is frequently utilized in chromatin biology and epigenetics. The challenge in experimental variability by unpredictable nature of usable input amounts from samples and undefined ... ...

    Abstract Chromatin immunoprecipitation (ChIP) is an antibody-based approach that is frequently utilized in chromatin biology and epigenetics. The challenge in experimental variability by unpredictable nature of usable input amounts from samples and undefined antibody titer in ChIP reaction still remains to be addressed. Here, we introduce a simple and quick method to quantify chromatin inputs and demonstrate its utility for normalizing antibody amounts to the optimal titer in individual ChIP reactions. For a proof of concept, we utilized ChIP-seq validated antibodies against the key enhancer mark, acetylation of histone H3 on lysine 27 (H3K27ac), in the experiments. The results indicate that the titration-based normalization of antibody amounts improves assay outcomes including the consistency among samples both within and across experiments for a broad range of input amounts.
    MeSH term(s) Chromatin Immunoprecipitation Sequencing/methods ; Chromatin Immunoprecipitation/methods ; Histones/genetics ; Chromatin ; Antibodies
    Chemical Substances Histones ; Chromatin ; Antibodies
    Language English
    Publishing date 2023-04-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 2041499-7
    ISSN 1471-2164 ; 1471-2164
    ISSN (online) 1471-2164
    ISSN 1471-2164
    DOI 10.1186/s12864-023-09253-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Gene expression endophenotypes: a novel approach for gene discovery in Alzheimer's disease.

    Ertekin-Taner, Nilüfer

    Molecular neurodegeneration

    2011  Volume 6, Page(s) 31

    Abstract: Uncovering the underlying genetic component of any disease is key to the understanding of its pathophysiology and may open new avenues for development of therapeutic strategies and biomarkers. In the past several years, there has been an explosion of ... ...

    Abstract Uncovering the underlying genetic component of any disease is key to the understanding of its pathophysiology and may open new avenues for development of therapeutic strategies and biomarkers. In the past several years, there has been an explosion of genome-wide association studies (GWAS) resulting in the discovery of novel candidate genes conferring risk for complex diseases, including neurodegenerative diseases. Despite this success, there still remains a substantial genetic component for many complex traits and conditions that is unexplained by the GWAS findings. Additionally, in many cases, the mechanism of action of the newly discovered disease risk variants is not inherently obvious. Furthermore, a genetic region with multiple genes may be identified via GWAS, making it difficult to discern the true disease risk gene. Several alternative approaches are proposed to overcome these potential shortcomings of GWAS, including the use of quantitative, biologically relevant phenotypes. Gene expression levels represent an important class of endophenotypes. Genetic linkage and association studies that utilize gene expression levels as endophenotypes determined that the expression levels of many genes are under genetic influence. This led to the postulate that there may exist many genetic variants that confer disease risk via modifying gene expression levels. Results from the handful of genetic studies which assess gene expression level endophenotypes in conjunction with disease risk suggest that this combined phenotype approach may both increase the power for gene discovery and lead to an enhanced understanding of their mode of action. This review summarizes the evidence in support of gene expression levels as promising endophenotypes in the discovery and characterization of novel candidate genes for complex diseases, which may also represent a novel approach in the genetic studies of Alzheimer's and other neurodegenerative diseases.
    Language English
    Publishing date 2011-05-14
    Publishing country England
    Document type Journal Article
    ISSN 1750-1326
    ISSN (online) 1750-1326
    DOI 10.1186/1750-1326-6-31
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: APOE ε4 influences within and between network functional connectivity in posterior cortical atrophy and logopenic progressive aphasia.

    Singh, Neha Atulkumar / Martin, Peter R / Graff-Radford, Jonathan / Machulda, Mary M / Carrasquillo, Minerva M / Ertekin-Taner, Nilufer / Josephs, Keith A / Whitwell, Jennifer L

    Alzheimer's & dementia : the journal of the Alzheimer's Association

    2023  Volume 19, Issue 9, Page(s) 3858–3866

    Abstract: Introduction: Presence of apolipoprotein E (APOE) ε4 has shown greater predisposition to medial temporal involvement in posterior cortical atrophy (PCA) and logopenic progressive aphasia (LPA). Little is known about its influence on memory network ... ...

    Abstract Introduction: Presence of apolipoprotein E (APOE) ε4 has shown greater predisposition to medial temporal involvement in posterior cortical atrophy (PCA) and logopenic progressive aphasia (LPA). Little is known about its influence on memory network connectivity, a network comprised of medial temporal structures.
    Methods: Fifty-eight PCA and 82 LPA patients underwent structural and resting state functional magnetic resonance imaging (MRI). Bayesian hierarchical linear models assessed the influence of APOE ε4 on within and between-network connectivity for five networks.
    Results: APOE ε4 carriers showed reduced memory and language within-network connectivity in LPA and increased salience within-network connectivity in PCA compared to non-carriers. Between-network analysis showed evidence of reduced DMN connectivity in APOE ε4 carriers, with reduced DMN-to-salience and DMN-to-language network connectivity in PCA, and reduced DMN-to-visual network connectivity in LPA.
    Discussion: The APOE genotype influences brain connectivity, both within and between-networks, in atypical Alzheimer's disease. However, there was evidence that the modulatory effects of APOE differ across phenotype.
    Highlights: APOE genotype is associated with reductions in within-network connectivity for the memory and language networks in LPA APOE genotype is associated with reductions in language-to-visual connectivity in LPA and PCA APOE genotype has no effect on the memory network in PCA.
    MeSH term(s) Humans ; Apolipoprotein E4/genetics ; Bayes Theorem ; Magnetic Resonance Imaging ; Alzheimer Disease/diagnostic imaging ; Alzheimer Disease/genetics ; Alzheimer Disease/complications ; Aphasia/diagnostic imaging ; Aphasia/genetics ; Aphasia/complications ; Apolipoproteins E ; Atrophy
    Chemical Substances Apolipoprotein E4 ; Apolipoproteins E
    Language English
    Publishing date 2023-03-31
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ZDB-ID 2211627-8
    ISSN 1552-5279 ; 1552-5260
    ISSN (online) 1552-5279
    ISSN 1552-5260
    DOI 10.1002/alz.13059
    Database MEDical Literature Analysis and Retrieval System OnLINE

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