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  1. Article ; Online: WRNing for the right DNA repair pathway choice.

    Lee, Jong-Hyuk / Croteau, Deborah L / Bohr, Vilhelm A

    Aging

    2022  Volume 14, Issue 11, Page(s) 4620–4621

    MeSH term(s) DNA Breaks, Double-Stranded ; DNA Repair ; RecQ Helicases/genetics ; RecQ Helicases/metabolism
    Chemical Substances RecQ Helicases (EC 3.6.4.12)
    Language English
    Publishing date 2022-06-01
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ISSN 1945-4589
    ISSN (online) 1945-4589
    DOI 10.18632/aging.204120
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Early-Onset Hearing Loss in Mouse Models of Alzheimer's Disease and Increased DNA Damage in the Cochlea.

    Park, Jae-Hyeon / Sahbaz, Burcin Duan / Pekhale, Komal / Chu, Xixia / Okur, Mustafa N / Grati, Mhamed / Isgrig, Kevin / Chien, Wade / Chrysostomou, Elena / Sullivan, Lauren / Croteau, Deborah L / Manor, Uri / Bohr, Vilhelm A

    Aging Biology

    2024  Volume 1

    Abstract: There is considerable interest in whether sensory deficiency is associated with the development of Alzheimer's disease (AD). Notably, the relationship between hearing impairment and AD is of high relevance but still poorly understood. In this study, we ... ...

    Abstract There is considerable interest in whether sensory deficiency is associated with the development of Alzheimer's disease (AD). Notably, the relationship between hearing impairment and AD is of high relevance but still poorly understood. In this study, we found early-onset hearing loss in two AD mouse models, 3xTgAD and 3xTgAD/Polβ
    Language English
    Publishing date 2024-02-20
    Publishing country United States
    Document type Journal Article
    DOI 10.59368/agingbio.20240025
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Aquatic insect accumulation of uranium at spring outflows in the Grand Canyon region as influenced by aqueous and sediment geochemistry and biological factors: implications for monitoring.

    Cain, Daniel J / Croteau, Marie-Noële / Fuller, Christopher C / Beisner, Kimberly R / Campbell, Kate M / Stoliker, Deborah L / Schenk, Edward R

    Environmental monitoring and assessment

    2023  Volume 195, Issue 7, Page(s) 841

    Abstract: Potential adverse ecological effects of expanded uranium (U) mining within the Grand Canyon region motivated studies to better understand U exposure and risk to endemic species. This study documents U exposures and analyzes geochemical and biological ... ...

    Abstract Potential adverse ecological effects of expanded uranium (U) mining within the Grand Canyon region motivated studies to better understand U exposure and risk to endemic species. This study documents U exposures and analyzes geochemical and biological factors affecting U bioaccumulation at spring-fed systems within the Grand Canyon region. The principal objective was to determine if aqueous U was broadly indicative of U accumulated by insect larvae, a dominate fauna. Analyses focused on three widely distributed taxa: Argia sp. (a predatory damselfly), Culicidae (suspension feeding mosquitos), and Limnephilus sp. (a detritivorous caddisfly). The study showed that U accumulated by aquatic insects (and periphyton) generally correlated positively with total dissolved U, although correlations were strongest when based on modeled concentrations of the U-dicarbonato complex, UO
    MeSH term(s) Animals ; Uranium/analysis ; Insecta ; Biological Factors ; Environmental Monitoring ; Water/analysis
    Chemical Substances Uranium (4OC371KSTK) ; Biological Factors ; Water (059QF0KO0R)
    Language English
    Publishing date 2023-06-15
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 782621-7
    ISSN 1573-2959 ; 0167-6369
    ISSN (online) 1573-2959
    ISSN 0167-6369
    DOI 10.1007/s10661-023-11254-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Mitochondrial OGG1 expression reduces age-associated neuroinflammation by regulating cytosolic mitochondrial DNA.

    Hussain, Mansoor / Chu, Xixia / Duan Sahbaz, Burcin / Gray, Samuel / Pekhale, Komal / Park, Jae-Hyeon / Croteau, Deborah L / Bohr, Vilhelm A

    Free radical biology & medicine

    2023  Volume 203, Page(s) 34–44

    Abstract: Aging is accompanied by a decline in DNA repair efficiency, which leads to the accumulation of different types of DNA damage. Age-associated chronic inflammation and generation of reactive oxygen species exacerbate the aging process and age-related ... ...

    Abstract Aging is accompanied by a decline in DNA repair efficiency, which leads to the accumulation of different types of DNA damage. Age-associated chronic inflammation and generation of reactive oxygen species exacerbate the aging process and age-related chronic disorders. These inflammatory processes establish conditions that favor accumulation of DNA base damage, especially 8-oxo-7,8 di-hydroguanine (8-oxoG), which in turn contributes to various age associated diseases. 8-oxoG is repaired by 8-oxoG glycosylase1 (OGG1) through the base excision repair (BER) pathway. OGG1 is present in both the cell nucleus and in mitochondria. Mitochondrial OGG1 has been implicated in mitochondrial DNA repair and increased mitochondrial function. Using transgenic mouse models and cell lines that have been engineered to have enhanced expression of mitochondria-targeted OGG1 (mtOGG1), we show that elevated levels of mtOGG1 in mitochondria can reverse aging-associated inflammation and improve functions. Old male mtOGG1
    MeSH term(s) Animals ; Female ; Male ; Mice ; DNA Damage ; DNA Glycosylases/genetics ; DNA Glycosylases/metabolism ; DNA Repair ; DNA, Mitochondrial/genetics ; DNA, Mitochondrial/metabolism ; Inflammation/genetics ; Inflammation/metabolism ; Mice, Transgenic ; Mitochondria/genetics ; Mitochondria/metabolism ; Neuroinflammatory Diseases ; Oxidative Stress/genetics ; Humans
    Chemical Substances DNA Glycosylases (EC 3.2.2.-) ; DNA, Mitochondrial ; Ogg1 protein, mouse (EC 3.2.2.-) ; oxoguanine glycosylase 1, human (EC 3.2.2.-)
    Language English
    Publishing date 2023-04-01
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Intramural
    ZDB-ID 807032-5
    ISSN 1873-4596 ; 0891-5849
    ISSN (online) 1873-4596
    ISSN 0891-5849
    DOI 10.1016/j.freeradbiomed.2023.03.262
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: RecQ dysfunction contributes to social and depressive-like behavior and affects aldolase activity in mice.

    Hou, Yujun / Park, Jae-Hyeon / Dan, Xiuli / Chu, Xixia / Yang, Beimeng / Hussain, Mansoor / Croteau, Deborah L / Bohr, Vilhelm A

    Neurobiology of disease

    2023  Volume 180, Page(s) 106092

    Abstract: RecQ helicase family proteins play vital roles in maintaining genome stability, including DNA replication, recombination, and DNA repair. In human cells, there are five RecQ helicases: RECQL1, Bloom syndrome (BLM), Werner syndrome (WRN), RECQL4, and ... ...

    Abstract RecQ helicase family proteins play vital roles in maintaining genome stability, including DNA replication, recombination, and DNA repair. In human cells, there are five RecQ helicases: RECQL1, Bloom syndrome (BLM), Werner syndrome (WRN), RECQL4, and RECQL5. Dysfunction or absence of RecQ proteins is associated with genetic disorders, tumorigenesis, premature aging, and neurodegeneration. The biochemical and biological roles of RecQ helicases are rather well established, however, there is no systematic study comparing the behavioral changes among various RecQ-deficient mice including consequences of exposure to DNA damage. Here, we investigated the effects of ionizing irradiation (IR) on three RecQ-deficient mouse models (RecQ1, WRN and RecQ4). We find abnormal cognitive behavior in RecQ-deficient mice in the absence of IR. Interestingly, RecQ dysfunction impairs social ability and induces depressive-like behavior in mice after a single exposure to IR, suggesting that RecQ proteins play roles in mood and cognition behavior. Further, transcriptomic and metabolomic analyses revealed significant alterations in RecQ-deficient mice, especially after IR exposure. In particular, pathways related to neuronal and microglial functions, DNA damage repair, cell cycle, and reactive oxygen responses were downregulated in the RecQ4 and WRN mice. In addition, increased DNA damage responses were found in RecQ-deficient mice. Notably, two genes, Aldolase Fructose-Bisphosphate B (Aldob) and NADPH Oxidase 4 (Nox4), were differentially expressed in RecQ-deficient mice. Our findings suggest that RecQ dysfunction contributes to social and depressive-like behaviors in mice, and that aldolase activity may be associated with these changes, representing a potential therapeutic target.
    MeSH term(s) Animals ; Humans ; Mice ; RecQ Helicases/genetics ; RecQ Helicases/metabolism ; DNA Replication ; DNA Repair ; DNA Damage ; Genomic Instability ; Aldehyde-Lyases/genetics ; Aldehyde-Lyases/metabolism
    Chemical Substances RecQ Helicases (EC 3.6.4.12) ; Aldehyde-Lyases (EC 4.1.2.-) ; RECQL5 protein, human
    Language English
    Publishing date 2023-03-21
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Intramural
    ZDB-ID 1211786-9
    ISSN 1095-953X ; 0969-9961
    ISSN (online) 1095-953X
    ISSN 0969-9961
    DOI 10.1016/j.nbd.2023.106092
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Mitochondrial PARP1 regulates NAD

    Lee, Jong-Hyuk / Hussain, Mansoor / Kim, Edward W / Cheng, Shang-Jung / Leung, Anthony K L / Fakouri, Nima Borhan / Croteau, Deborah L / Bohr, Vilhelm A

    Experimental & molecular medicine

    2022  Volume 54, Issue 12, Page(s) 2135–2147

    Abstract: PARPs play fundamental roles in multiple DNA damage recognition and repair pathways. Persistent nuclear PARP activation causes cellular ... ...

    Abstract PARPs play fundamental roles in multiple DNA damage recognition and repair pathways. Persistent nuclear PARP activation causes cellular NAD
    MeSH term(s) Poly ADP Ribosylation ; NAD/metabolism ; Poly(ADP-ribose) Polymerase Inhibitors ; Mitochondria/metabolism ; DNA, Mitochondrial/genetics ; DNA, Mitochondrial/metabolism
    Chemical Substances NAD (0U46U6E8UK) ; Poly(ADP-ribose) Polymerase Inhibitors ; DNA, Mitochondrial
    Language English
    Publishing date 2022-12-06
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Intramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 1328915-9
    ISSN 2092-6413 ; 1226-3613 ; 0378-8512
    ISSN (online) 2092-6413
    ISSN 1226-3613 ; 0378-8512
    DOI 10.1038/s12276-022-00894-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Heterochromatin: an epigenetic point of view in aging.

    Lee, Jong-Hyuk / Kim, Edward W / Croteau, Deborah L / Bohr, Vilhelm A

    Experimental & molecular medicine

    2020  Volume 52, Issue 9, Page(s) 1466–1474

    Abstract: Aging is an inevitable process of life. Defined by progressive physiological and functional loss of tissues and organs, aging increases the risk of mortality for the organism. The aging process is affected by various factors, including genetic and ... ...

    Abstract Aging is an inevitable process of life. Defined by progressive physiological and functional loss of tissues and organs, aging increases the risk of mortality for the organism. The aging process is affected by various factors, including genetic and epigenetic ones. Here, we review the chromatin-specific epigenetic changes that occur during normal (chronological) aging and in premature aging diseases. Taking advantage of the reversible nature of epigenetic modifications, we will also discuss possible lifespan expansion strategies through epigenetic modulation, which was considered irreversible until recently.
    MeSH term(s) Age Factors ; Aging/genetics ; Animals ; Chromatin/genetics ; Chromatin/metabolism ; Epigenesis, Genetic ; Epigenomics/methods ; Gene Expression Regulation ; Heterochromatin/genetics ; Heterochromatin/metabolism ; Histones/metabolism ; Humans ; Longevity
    Chemical Substances Chromatin ; Heterochromatin ; Histones
    Language English
    Publishing date 2020-09-04
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Intramural ; Review
    ZDB-ID 1328915-9
    ISSN 2092-6413 ; 1226-3613 ; 0378-8512
    ISSN (online) 2092-6413
    ISSN 1226-3613 ; 0378-8512
    DOI 10.1038/s12276-020-00497-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Nicotinamide adenine dinucleotide supplementation drives gut microbiota variation in Alzheimer's mouse model.

    Chu, Xixia / Hou, Yujun / Meng, Qiong / Croteau, Deborah L / Wei, Yong / De, Supriyo / Becker, Kevin G / Bohr, Vilhelm A

    Frontiers in aging neuroscience

    2022  Volume 14, Page(s) 993615

    Abstract: Alzheimer's disease (AD) is the most common neurodegenerative disease. Growing evidence suggests an important role for gut dysbiosis and gut microbiota-host interactions in aging and neurodegeneration. Our previous works have demonstrated that ... ...

    Abstract Alzheimer's disease (AD) is the most common neurodegenerative disease. Growing evidence suggests an important role for gut dysbiosis and gut microbiota-host interactions in aging and neurodegeneration. Our previous works have demonstrated that supplementation with the nicotinamide adenine dinucleotide (NAD
    Language English
    Publishing date 2022-09-15
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2558898-9
    ISSN 1663-4365
    ISSN 1663-4365
    DOI 10.3389/fnagi.2022.993615
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  9. Article ; Online: Olfactory dysfunction in aging and neurodegenerative diseases.

    Dan, Xiuli / Wechter, Noah / Gray, Samuel / Mohanty, Joy G / Croteau, Deborah L / Bohr, Vilhelm A

    Ageing research reviews

    2021  Volume 70, Page(s) 101416

    Abstract: Alterations in olfactory functions are proposed to be early biomarkers for neurodegeneration. Many neurodegenerative diseases are age-related, including two of the most common, Parkinson's disease (PD) and Alzheimer's disease (AD). The establishment of ... ...

    Abstract Alterations in olfactory functions are proposed to be early biomarkers for neurodegeneration. Many neurodegenerative diseases are age-related, including two of the most common, Parkinson's disease (PD) and Alzheimer's disease (AD). The establishment of biomarkers that promote early risk identification is critical for the implementation of early treatment to postpone or avert pathological development. Olfactory dysfunction (OD) is seen in 90% of early-stage PD patients and 85% of patients with early-stage AD, which makes it an attractive biomarker for early diagnosis of these diseases. Here, we systematically review widely applied smelling tests available for humans as well as olfaction assessments performed in some animal models and the relationships between OD and normal aging, PD, AD, and other conditions. The utility of OD as a biomarker for neurodegenerative disease diagnosis and future research directions are also discussed.
    MeSH term(s) Aging ; Alzheimer Disease/diagnosis ; Animals ; Humans ; Neurodegenerative Diseases ; Olfaction Disorders/diagnosis ; Parkinson Disease ; Smell
    Language English
    Publishing date 2021-07-27
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, N.I.H., Intramural ; Review ; Systematic Review
    ZDB-ID 2075672-0
    ISSN 1872-9649 ; 1568-1637
    ISSN (online) 1872-9649
    ISSN 1568-1637
    DOI 10.1016/j.arr.2021.101416
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Self-assembly of multi-component mitochondrial nucleoids via phase separation.

    Feric, Marina / Demarest, Tyler G / Tian, Jane / Croteau, Deborah L / Bohr, Vilhelm A / Misteli, Tom

    The EMBO journal

    2021  Volume 40, Issue 6, Page(s) e107165

    Abstract: Mitochondria contain an autonomous and spatially segregated genome. The organizational unit of their genome is the nucleoid, which consists of mitochondrial DNA (mtDNA) and associated architectural proteins. Here, we show that phase separation is the ... ...

    Abstract Mitochondria contain an autonomous and spatially segregated genome. The organizational unit of their genome is the nucleoid, which consists of mitochondrial DNA (mtDNA) and associated architectural proteins. Here, we show that phase separation is the primary physical mechanism for assembly and size control of the mitochondrial nucleoid (mt-nucleoid). The major mtDNA-binding protein TFAM spontaneously phase separates in vitro via weak, multivalent interactions into droplets with slow internal dynamics. TFAM and mtDNA form heterogenous, viscoelastic structures in vitro, which recapitulate the dynamics and behavior of mt-nucleoids in vivo. Mt-nucleoids coalesce into larger droplets in response to various forms of cellular stress, as evidenced by the enlarged and transcriptionally active nucleoids in mitochondria from patients with the premature aging disorder Hutchinson-Gilford Progeria Syndrome (HGPS). Our results point to phase separation as an evolutionarily conserved mechanism of genome organization.
    MeSH term(s) Cell Line ; Child ; Child, Preschool ; DNA, Mitochondrial/genetics ; DNA-Binding Proteins/metabolism ; Genome, Mitochondrial/genetics ; HEK293 Cells ; Humans ; Mitochondria/genetics ; Mitochondrial Proteins/metabolism ; Progeria/genetics ; Progeria/pathology ; Transcription Factors/metabolism
    Chemical Substances DNA, Mitochondrial ; DNA-Binding Proteins ; Mitochondrial Proteins ; TFAM protein, human ; Transcription Factors
    Language English
    Publishing date 2021-02-23
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, N.I.H., Intramural
    ZDB-ID 586044-1
    ISSN 1460-2075 ; 0261-4189
    ISSN (online) 1460-2075
    ISSN 0261-4189
    DOI 10.15252/embj.2020107165
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