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Yu HJ, Byun YH, Park CK. Techniques for assessing telomere length: A methodological review. Comput Struct Biotechnol J 2024; 23:1489-1498. [PMID: 38633384 PMCID: PMC11021795 DOI: 10.1016/j.csbj.2024.04.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 04/04/2024] [Accepted: 04/05/2024] [Indexed: 04/19/2024] Open
Abstract
Telomeres are located at the ends of chromosomes and have specific sequences with a distinctive structure that safeguards genes. They possess capping structures that protect chromosome ends from fusion events and ensure chromosome stability. Telomeres shorten in length during each cycle of cell division. When this length reaches a certain threshold, it can lead to genomic instability, thus being implicated in various diseases, including cancer and neurodegenerative disorders. The possibility of telomeres serving as a biomarker for aging and age-related disease is being explored, and their significance is still under study. This is because post-mitotic cells, which are mature cells that do not undergo mitosis, do not experience telomere shortening due to age. Instead, other causes, for example, exposure to oxidative stress, can directly damage the telomeres, causing genomic instability. Nonetheless, a general agreement has been established that measuring telomere length offers valuable insights and forms a crucial foundation for analyzing gene expression and epigenetic data. Numerous approaches have been developed to accurately measure telomere lengths. In this review, we summarize various methods and their advantages and limitations for assessing telomere length.
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Affiliation(s)
- Hyeon Jong Yu
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Yoon Hwan Byun
- Department of Neurosurgery, SMG-SNU Boramae Medical Center, Seoul, Republic of Korea
| | - Chul-Kee Park
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Republic of Korea
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Imahori Y, Qin C, Tang B, Hägg S. Comprehensive analysis of molecular, physiological, and functional biomarkers of aging with neurological diseases using Mendelian randomization. GeroScience 2024:10.1007/s11357-024-01334-6. [PMID: 39269583 DOI: 10.1007/s11357-024-01334-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Accepted: 08/28/2024] [Indexed: 09/15/2024] Open
Abstract
An increasing burden of neurological diseases (NDs) has been a public health challenge in an aging society. Age, especially biological age, is the most important risk factor for NDs. Identification of biomarkers of aging to capture NDs might lead to a better understanding of the underlying mechanisms of pathological brain aging and the implementation of effective intervention. We conducted a comprehensive two-sample Mendelian Randomization (MR) study to investigate the association between various biomarkers of aging and three leading causes of NDs: Alzheimer's disease (AD), vascular dementia (VaD), and ischemic stroke. Publicly available GWAS summary statistics on people from European ancestry were obtained for six molecular biomarkers, two physiological biomarkers, and eight functional biomarkers, and three NDs. Genetic variants serving as instrumental variables (IVs) were identified for each biomarker. The MR analysis included inverse variance weighted (IVW), weighted median, MR-Egger, and MR-PRESSO. We found that short telomere length and decrease in appendicular lean mass were associated with an increased risk for AD (OR IVW = 1.12 per 1SD decrease, 95% confidence interval 1.02-1.22, and OR IVW = 1.11, 1.06-1.16, respectively), whereas high frailty index showed a protective effect for AD. Accelerated BioAge appeared to be associated with increased risk for ischemic stroke (OR IVW = 1.3 per year in BioAge acceleration, 95% CI 1.19-1.41). Our findings implied a causal association of short telomere length and a decrease in appendicular lean mass with an increased risk for AD, while BioAge appeared to be a good biomarker for ischemic stroke. Further studies are needed to validate these associations and explore underlying mechanisms.
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Affiliation(s)
- Yume Imahori
- The Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Chenxi Qin
- The Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Bowen Tang
- The Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Sara Hägg
- The Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
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Rodríguez-Fernández B, Sánchez-Benavides G, Genius P, Minguillon C, Fauria K, De Vivo I, Navarro A, Molinuevo JL, Gispert JD, Sala-Vila A, Vilor-Tejedor N, Crous-Bou M. Association between telomere length and cognitive function among cognitively unimpaired individuals at risk of Alzheimer's disease. Neurobiol Aging 2024; 141:140-150. [PMID: 38936230 DOI: 10.1016/j.neurobiolaging.2024.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 05/23/2024] [Accepted: 05/24/2024] [Indexed: 06/29/2024]
Abstract
INTRODUCTION Leukocyte telomere length (LTL) is an objective biomarker of biological aging, and it is proposed to play a crucial role in Alzheimer's disease (AD) risk. We aimed at evaluating the cross-sectional association between LTL and cognitive performance in middle-aged cognitively unimpaired individuals at increased risk of AD. METHODS A total of 1520 participants from the ALFA cohort were included. Relative telomere length was measured in leukocytes through qPCR. LTL was residualized against age and sex, and associations with cognitive performance were assessed in short and long groups based on residualized LTL (rLTL). Interactions with sex and genetic risk of AD were tested. RESULTS Non-linear associations were found between LTL and episodic memory (EM). Better EM was associated with longer rLTL among women in the short rLTL group. DISCUSSION Results suggest a potential role of telomeres in the cognitive aging process with sex-specific patterns.
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Affiliation(s)
- Blanca Rodríguez-Fernández
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, C/ de Wellington, 30, Barcelona 08005, Spain; IMIM - Hospital del Mar Medical Research Institute, C/ del Dr. Aiguader, 88, 2nd floor, Campus Mar, Barcelona 08003, Spain; Centre for Genomic Regulation (CRG), The Barcelona Institute for Science and Technology, C/ del Dr. Aiguader, 88, Barcelona 08003, Spain; Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Barcelona, Spain
| | - Gonzalo Sánchez-Benavides
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, C/ de Wellington, 30, Barcelona 08005, Spain; IMIM - Hospital del Mar Medical Research Institute, C/ del Dr. Aiguader, 88, 2nd floor, Campus Mar, Barcelona 08003, Spain; Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBER-FES). Instituto de Salud Carlos III, C/ Monforte de Lemos 3-5. Pabellón 11, Planta 0, Madrid 28029, Spain
| | - Patricia Genius
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, C/ de Wellington, 30, Barcelona 08005, Spain; IMIM - Hospital del Mar Medical Research Institute, C/ del Dr. Aiguader, 88, 2nd floor, Campus Mar, Barcelona 08003, Spain; Centre for Genomic Regulation (CRG), The Barcelona Institute for Science and Technology, C/ del Dr. Aiguader, 88, Barcelona 08003, Spain
| | - Carolina Minguillon
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, C/ de Wellington, 30, Barcelona 08005, Spain; IMIM - Hospital del Mar Medical Research Institute, C/ del Dr. Aiguader, 88, 2nd floor, Campus Mar, Barcelona 08003, Spain; Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBER-FES). Instituto de Salud Carlos III, C/ Monforte de Lemos 3-5. Pabellón 11, Planta 0, Madrid 28029, Spain
| | - Karine Fauria
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, C/ de Wellington, 30, Barcelona 08005, Spain; Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBER-FES). Instituto de Salud Carlos III, C/ Monforte de Lemos 3-5. Pabellón 11, Planta 0, Madrid 28029, Spain
| | - Immaculata De Vivo
- Department of Epidemiology, Harvard T.H. Chan School of Public Health. School of Public Health 2, 677 Huntington Ave, Boston, MA 02115, USA; Channing Division of Network Medicine, Harvard Medical School, Boston, MA 02115, USA
| | - Arcadi Navarro
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, C/ de Wellington, 30, Barcelona 08005, Spain; Centre for Genomic Regulation (CRG), The Barcelona Institute for Science and Technology, C/ del Dr. Aiguader, 88, Barcelona 08003, Spain; Institute of Evolutionary Biology (CSIC-UPF), Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Pg. Marítim de la Barceloneta, 37, Barcelona 08003, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Jose Luis Molinuevo
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, C/ de Wellington, 30, Barcelona 08005, Spain
| | - Juan Domingo Gispert
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, C/ de Wellington, 30, Barcelona 08005, Spain; IMIM - Hospital del Mar Medical Research Institute, C/ del Dr. Aiguader, 88, 2nd floor, Campus Mar, Barcelona 08003, Spain; Centro de Investigación Biomédica en Red Bioingeniería, Biomateriales y Nanomedicina. Instituto de Salud Carlos III, C/ Monforte de Lemos 3-5. Pabellón 11, Planta 0, Madrid 28029, Spain; Centro Nacional de Investigaciones Cardiovasculares (CNIC), C. de Melchor Fernández Almagro, 3, Madrid 28029, Spain
| | - Aleix Sala-Vila
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, C/ de Wellington, 30, Barcelona 08005, Spain; IMIM - Hospital del Mar Medical Research Institute, C/ del Dr. Aiguader, 88, 2nd floor, Campus Mar, Barcelona 08003, Spain
| | - Natalia Vilor-Tejedor
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, C/ de Wellington, 30, Barcelona 08005, Spain; IMIM - Hospital del Mar Medical Research Institute, C/ del Dr. Aiguader, 88, 2nd floor, Campus Mar, Barcelona 08003, Spain; Centre for Genomic Regulation (CRG), The Barcelona Institute for Science and Technology, C/ del Dr. Aiguader, 88, Barcelona 08003, Spain; Department of Human Genetics, Radboud University Medical Center, Nijmegen, the Netherlands; Universitat Pompeu Fabra, C/ de Ramon Trias Fargas, 25, 27, Barcelona 08005, Spain.
| | - Marta Crous-Bou
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, C/ de Wellington, 30, Barcelona 08005, Spain; Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBER-FES). Instituto de Salud Carlos III, C/ Monforte de Lemos 3-5. Pabellón 11, Planta 0, Madrid 28029, Spain; Department of Human Genetics, Radboud University Medical Center, Nijmegen, the Netherlands; Catalan Institute of Oncology (ICO)-Bellvitge Biomedical Research Center (IDIBELL), Hospital Duran i Reynals, Avinguda de la Granvia de l'Hospitalet, 199-203, L'Hospitalet de Llobregat, Barcelona 08908, Spain.
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Greenberg EF, Voorbach MJ, Smith A, Reuter DR, Zhuang Y, Wang JQ, Wooten DW, Asque E, Hu M, Hoft C, Duggan R, Townsend M, Orsi K, Dalecki K, Amberg W, Duggan L, Knight H, Spina JS, He Y, Marsh K, Zhao V, Ybarra S, Mollon J, Fang Y, Vasanthakumar A, Westmoreland S, Droescher M, Finnema SJ, Florian H. Navitoclax safety, tolerability, and effect on biomarkers of senescence and neurodegeneration in aged nonhuman primates. Heliyon 2024; 10:e36483. [PMID: 39253182 PMCID: PMC11382177 DOI: 10.1016/j.heliyon.2024.e36483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2024] [Revised: 08/01/2024] [Accepted: 08/16/2024] [Indexed: 09/11/2024] Open
Abstract
Alzheimer's disease (AD) is the most common global dementia and is universally fatal. Most late-stage AD disease-modifying therapies are intravenous and target amyloid beta (Aβ), with only modest effects on disease progression: there remains a high unmet need for convenient, safe, and effective therapeutics. Senescent cells (SC) and the senescence-associated secretory phenotype (SASP) drive AD pathology and increase with AD severity. Preclinical senolytic studies have shown improvements in neuroinflammation, tau, Aβ, and CNS damage; most were conducted in transgenic rodent models with uncertain human translational relevance. In this study, aged cynomolgus monkeys had significant elevation of biomarkers of senescence, SASP, and neurological damage. Intermittent treatment with the senolytic navitoclax induced modest reversible thrombocytopenia; no serious drug-related toxicity was noted. Navitoclax reduced several senescence and SASP biomarkers, with CSF concentrations sufficient for senolysis. Finally, navitoclax reduced TSPO-PET frontal cortex binding and showed trends of improvement in CSF biomarkers of neuroinflammation, neuronal damage, and synaptic dysfunction. Overall, navitoclax administration was safe and well tolerated in aged monkeys, inducing trends of biomarker changes relevant to human neurodegenerative disease.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Min Hu
- AbbVie Inc., North Chicago, IL, United States
| | - Carolin Hoft
- AbbVie Deutschland GmbH & Co. KG, Neuroscience Research, Knollstrasse, 67061, Ludwigshafen, Germany
| | - Ryan Duggan
- AbbVie Inc., North Chicago, IL, United States
| | - Matthew Townsend
- AbbVie, Cambridge Research Center, 200 Sidney Street, Cambridge, MA, 02139, United States
| | - Karin Orsi
- AbbVie Bioresearch Center, 100 Research Drive, Worcester, MA, 01605, United States
| | | | - Willi Amberg
- AbbVie Deutschland GmbH & Co. KG, Neuroscience Research, Knollstrasse, 67061, Ludwigshafen, Germany
| | - Lori Duggan
- AbbVie Bioresearch Center, 100 Research Drive, Worcester, MA, 01605, United States
| | - Heather Knight
- AbbVie Bioresearch Center, 100 Research Drive, Worcester, MA, 01605, United States
| | - Joseph S Spina
- AbbVie Bioresearch Center, 100 Research Drive, Worcester, MA, 01605, United States
| | - Yupeng He
- AbbVie Inc., North Chicago, IL, United States
| | | | - Vivian Zhao
- AbbVie Bay Area, 1000 Gateway Boulevard, South San Francisco, CA, 94080, United States
| | - Suzanne Ybarra
- AbbVie Bay Area, 1000 Gateway Boulevard, South San Francisco, CA, 94080, United States
| | - Jennifer Mollon
- AbbVie Deutschland GmbH & Co. KG, Statistical Sciences and Analytics, Knollstrasse, 67061, Ludwigshafen, Germany
| | - Yuni Fang
- AbbVie Bay Area, 1000 Gateway Boulevard, South San Francisco, CA, 94080, United States
| | | | - Susan Westmoreland
- AbbVie Bioresearch Center, 100 Research Drive, Worcester, MA, 01605, United States
| | - Mathias Droescher
- AbbVie Deutschland GmbH & Co. KG, Neuroscience Research, Knollstrasse, 67061, Ludwigshafen, Germany
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Soraci L, Corsonello A, Paparazzo E, Montesanto A, Piacenza F, Olivieri F, Gambuzza ME, Savedra EV, Marino S, Lattanzio F, Biscetti L. Neuroinflammaging: A Tight Line Between Normal Aging and Age-Related Neurodegenerative Disorders. Aging Dis 2024; 15:1726-1747. [PMID: 38300639 PMCID: PMC11272206 DOI: 10.14336/ad.2023.1001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 10/01/2023] [Indexed: 02/02/2024] Open
Abstract
Aging in the healthy brain is characterized by a low-grade, chronic, and sterile inflammatory process known as neuroinflammaging. This condition, mainly consisting in an up-regulation of the inflammatory response at the brain level, contributes to the pathogenesis of age-related neurodegenerative disorders. Development of this proinflammatory state involves the interaction between genetic and environmental factors, able to induce age-related epigenetic modifications. Indeed, the exposure to environmental compounds, drugs, and infections, can contribute to epigenetic modifications of DNA methylome, histone fold proteins, and nucleosome positioning, leading to epigenetic modulation of neuroinflammatory responses. Furthermore, some epigenetic modifiers, which combine and interact during the life course, can contribute to modeling of epigenome dynamics to sustain, or dampen the neuroinflammatory phenotype. The aim of this review is to summarize current knowledge about neuroinflammaging with a particular focus on epigenetic mechanisms underlying the onset and progression of neuroinflammatory cascades in the central nervous system; furthermore, we describe some diagnostic biomarkers that may contribute to increase diagnostic accuracy and help tailor therapeutic strategies in patients with neurodegenerative diseases.
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Affiliation(s)
- Luca Soraci
- Unit of Geriatric Medicine, Italian National Research Center of Aging (IRCCS INRCA), Cosenza, Italy.
| | - Andrea Corsonello
- Unit of Geriatric Medicine, Italian National Research Center of Aging (IRCCS INRCA), Cosenza, Italy.
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy.
| | - Ersilia Paparazzo
- Department of Biology, Ecology and Earth Sciences, University of Calabria, Rende, Italy.
| | - Alberto Montesanto
- Department of Biology, Ecology and Earth Sciences, University of Calabria, Rende, Italy.
| | - Francesco Piacenza
- Advanced Technology Center for Aging Research, Italian National Research Center of Aging (IRCCS INRCA), IRCCS INRCA, Ancona, Italy.
| | - Fabiola Olivieri
- Department of Clinical and Molecular Sciences, Università Politecnica delle Marche, Ancona, Italy.
- Clinic of Laboratory and Precision Medicine, Italian National Research Center of Aging (IRCCS INRCA), Ancona, Italy.
| | | | | | - Silvia Marino
- IRCCS Centro Neurolesi "Bonino-Pulejo”, Messina, Italy.
| | | | - Leonardo Biscetti
- Section of Neurology, Italian National Research Center on Aging (IRCCS INRCA), Ancona, Italy.
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Bourassa KJ, Sbarra DA. Trauma, adversity, and biological aging: behavioral mechanisms relevant to treatment and theory. Transl Psychiatry 2024; 14:285. [PMID: 38997260 PMCID: PMC11245531 DOI: 10.1038/s41398-024-03004-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 06/20/2024] [Accepted: 07/02/2024] [Indexed: 07/14/2024] Open
Abstract
Although stress and adversity are largely universal experiences, people exposed to greater hardship are at increased risk for negative health consequences. Recent studies identify accelerated biological aging as a mechanism that could explain how trauma and adversity gives rise to poor health, and advances in this area of study coincide with technological innovations in the measurement of biological aging, particularly epigenetic profiles consistent with accelerated aging derived from DNA methylation. In this review, we provide an overview of the current literature examining how adversity might accelerate biological aging, with a specific focus on social and health behaviors. The most extensive evidence in this area suggests that health-compromising behaviors, particularly smoking, may partially explain the association between adversity and accelerated aging. Although there is relatively less published support for the role of social behaviors, emerging evidence points to the importance of social connection as a mechanism for future study. Our review highlights the need to determine the extent to which the associations from adversity to accelerated aging are consistent with causal processes. As we consider these questions, the review emphasizes methodological approaches from the causal inference literature that can help deepen our understanding of how stress and trauma might result in poor health. The use of these methodologies will help provide evidence as to which behavioral interventions might slow aging and improve health, particularly among populations that more often experience adversity and trauma.
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Affiliation(s)
- Kyle J Bourassa
- VA Mid-Atlantic Mental Illness Research, Education and Clinical Center, Durham VA Health Care System, Durham, NC, USA.
- Geriatric Research, Education, and Clinical Center, Durham Veteran Affairs (VA) Health Care System, Durham, NC, USA.
- Center for the Study of Aging and Human Development, Duke University Medical Center, Durham, NC, USA.
| | - David A Sbarra
- Department of Psychology, University of Arizona, Tucson, AZ, USA
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Zhang J, Tian Z, Qin C, Momeni MR. The effects of exercise on epigenetic modifications: focus on DNA methylation, histone modifications and non-coding RNAs. Hum Cell 2024; 37:887-903. [PMID: 38587596 DOI: 10.1007/s13577-024-01057-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 03/10/2024] [Indexed: 04/09/2024]
Abstract
Physical activity on a regular basis has been shown to bolster the overall wellness of an individual; research is now revealing that these changes are accompanied by epigenetic modifications. Regular exercise has been proven to make intervention plans more successful and prolong adherence to them. When it comes to epigenetic changes, there are four primary components. This includes changes to the DNA, histones, expression of particular non-coding RNAs and DNA methylation. External triggers, such as physical activity, can lead to modifications in the epigenetic components, resulting in changes in the transcription process. This report pays attention to the current knowledge that pertains to the epigenetic alterations that occur after exercise, the genes affected and the resulting characteristics.
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Affiliation(s)
- Junxiong Zhang
- Xiamen Academy of Art and Design, Fuzhou University, Xiamen, 361024, Fujian, China.
| | - Zhongxin Tian
- College of Physical Education, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, China.
| | - Chao Qin
- College of Physical Education, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, China
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8
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Ma Y, Wang M, Chen X, Ruan W, Yao J, Lian X. Telomere length and multiple sclerosis: a Mendelian randomization study. Int J Neurosci 2024; 134:229-233. [PMID: 35791675 DOI: 10.1080/00207454.2022.2098737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 06/21/2022] [Indexed: 10/17/2022]
Abstract
PURPOSE OF THE STUDY Previous studies have established that telomere length is associated with multiple sclerosis (MS). However, confounding factors and reverse causality bias can impair observational research. Here, we conducted a two-sample MR study to see if telomere length is causally linked to MS using publically available GWAS summary statistics. MATERIALS AND METHODS We screened 13 independent single-nucleotide polymorphisms (SNPs) related to leukocyte telomere length in a recent genome-wide association meta-analysis, which was available for 78,592 samples of European ancestry. The summary statistics for MS were from the latest meta-analyses conducted by the International Multiple Sclerosis Genetics Consortium (IMSGC), which included 115,803 European participants (47,429 MS, 68,374 controls). RESULTS We found that leukocyte telomere length and MS are correlated (IVW estimate of odds ratio (OR): 2.13 per 1-SD increase in genetically determined telomere length, 95% confidence interval (CI): 1.55-2.92, p = 3.18 × 10-6). CONCLUSION Our MR study supported that leukocyte telomere length and MS have a positive causal relationship. Further researches are warranted to elucidate the physiological mechanism.
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Affiliation(s)
- Yazhou Ma
- Department of Neurology, Third Affiliated Hospital, Soochow University, Changzhou, China
| | - Mengmeng Wang
- Department of Neurology, Third Affiliated Hospital, Soochow University, Changzhou, China
| | - Xin Chen
- Department of Neurology, Third Affiliated Hospital, Soochow University, Changzhou, China
| | - Wang Ruan
- Department of Neurology, Third Affiliated Hospital, Soochow University, Changzhou, China
| | - Jianrong Yao
- Department of Neurology, Third Affiliated Hospital, Soochow University, Changzhou, China
| | - Xuegan Lian
- Department of Neurology, Third Affiliated Hospital, Soochow University, Changzhou, China
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Wei B, Zhou Y, Li Q, Zhen S, Wu Q, Xiao Z, Liao J, Zhu B, Duan J, Yang X, Liang F. Outdoor fine particulate matter exposure and telomere length in humans: A systematic review and meta-analysis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 275:116206. [PMID: 38518608 DOI: 10.1016/j.ecoenv.2024.116206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 02/17/2024] [Accepted: 03/09/2024] [Indexed: 03/24/2024]
Abstract
Although the association between changes in human telomere length (TL) and ambient fine particulate matter (PM2.5) has been documented, there remains disagreement among the related literature. Our study conducted a systematic review and meta-analysis of epidemiological studies to investigate the health effects of outdoor PM2.5 exposure on human TL after a thorough database search. To quantify the overall effect estimates of TL changes associated with every 10 μg/m3 increase in PM2.5 exposure, we focused on two main topics, which were outdoor long-term exposure and prenatal exposure of PM2.5. Additionally, we included a summary of short-term PM2.5 exposure and its impact on TL due to limited data availability. Our qualitative analysis included 20 studies with 483,600 participants. The meta-analysis showed a statistically significant association between outdoor PM2.5 exposure and shorter human TL, with pooled impact estimates (β) of -0.12 (95% CI: -0.20, -0.03, I2= 95.4%) for general long-term exposure and -0.07 (95% CI: -0.15, 0.00, I2= 74.3%) for prenatal exposure. In conclusion, our findings suggest that outdoor PM2.5 exposure may contribute to TL shortening, and noteworthy associations were observed in specific subgroups, suggesting the impact of various research variables. Larger, high-quality studies using standardized methodologies are necessary to strengthen these conclusions further.
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Affiliation(s)
- Bincai Wei
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yawen Zhou
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen 518055, China
| | - Qian Li
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen 518055, China
| | - Shihan Zhen
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen 518055, China
| | - Qingyao Wu
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zhiyi Xiao
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jian Liao
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen 518055, China
| | - Bin Zhu
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jiahao Duan
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xueli Yang
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, 22 Qixiangtai Road, Heping District, Tianjin 300070, China..
| | - Fengchao Liang
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen 518055, China.
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Campisi M, Cannella L, Celik D, Gabelli C, Gollin D, Simoni M, Ruaro C, Fantinato E, Pavanello S. Mitigating cellular aging and enhancing cognitive functionality: visual arts-mediated Cognitive Activation Therapy in neurocognitive disorders. Front Aging Neurosci 2024; 16:1354025. [PMID: 38524114 PMCID: PMC10957554 DOI: 10.3389/fnagi.2024.1354025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 02/20/2024] [Indexed: 03/26/2024] Open
Abstract
The growing phenomenon of population aging is redefining demographic dynamics, intensifying age-related conditions, especially dementia, projected to triple by 2050 with an enormous global economic burden. This study investigates visual arts-mediated Cognitive Activation Therapy (CAT) as a non-pharmacological CAT intervention targets both biological aging [leukocyte telomere length (LTL), DNA methylation age (DNAmAge)] and cognitive functionality. Aligning with a broader trend of integrating non-pharmacological approaches into dementia care. The longitudinal study involved 20 patients with mild to moderate neurocognitive disorders. Cognitive and functional assessments, and biological aging markers -i.e., LTL and DNAmAge- were analyzed before and after CAT intervention. Change in LTL was positively correlated with days of treatment (p =0.0518). LTL significantly elongated after intervention (p =0.0269), especially in men (p =0.0142), correlating with younger age (p =0.0357), and higher education (p =0.0008). DNAmAge remained instead stable post-treatment. Cognitive and functional improvements were observed for Copy of complex geometric figure, Progressive Silhouettes, Position Discrimination, Communication Activities of Daily Living-Second edition, Direct Functional Status (p < 0.0001) and Object decision (p =0.0594), but no correlations were found between LTL and cognitive gains. Visual arts-mediated CAT effectively mitigates cellular aging, especially in men, by elongating LTL. These findings underscore the potential of non-pharmacological interventions in enhancing cognitive and functional status and general well-being in dementia care. Further research with larger and longer-term studies is essential for validation.
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Affiliation(s)
- Manuela Campisi
- Occupational Medicine, Department of Cardio-Thoraco-Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | - Luana Cannella
- Occupational Medicine, Department of Cardio-Thoraco-Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | - Dilek Celik
- Occupational Medicine, Department of Cardio-Thoraco-Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | - Carlo Gabelli
- Regional Centre for the Aging Brain (CRIC), University Hospital of Padua, Padua, Italy
| | - Donata Gollin
- Regional Centre for the Aging Brain (CRIC), University Hospital of Padua, Padua, Italy
| | - Marco Simoni
- Regional Centre for the Aging Brain (CRIC), University Hospital of Padua, Padua, Italy
| | - Cristina Ruaro
- Regional Centre for the Aging Brain (CRIC), University Hospital of Padua, Padua, Italy
| | - Elena Fantinato
- Regional Centre for the Aging Brain (CRIC), University Hospital of Padua, Padua, Italy
| | - Sofia Pavanello
- Occupational Medicine, Department of Cardio-Thoraco-Vascular Sciences and Public Health, University of Padua, Padua, Italy
- University Hospital of Padua, Padua, Italy
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11
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Wolf SE, Hastings WJ, Ye Q, Etzel L, Apsley AT, Chiaro C, Heim CC, Heller T, Noll JG, Schreier HMC, Shenk CE, Shalev I. Cross-tissue comparison of telomere length and quality metrics of DNA among individuals aged 8 to 70 years. PLoS One 2024; 19:e0290918. [PMID: 38386656 PMCID: PMC10883573 DOI: 10.1371/journal.pone.0290918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 01/03/2024] [Indexed: 02/24/2024] Open
Abstract
Telomere length (TL) is an important biomarker of cellular aging, yet its links with health outcomes may be complicated by use of different tissues. We evaluated within- and between-individual variability in TL and quality metrics of DNA across five tissues using a cross-sectional dataset ranging from 8 to 70 years (N = 197). DNA was extracted from all tissue cells using the Gentra Puregene DNA Extraction Kit. Absolute TL (aTL) in kilobase pairs was measured in buccal epithelial cells, saliva, dried blood spots (DBS), buffy coat, and peripheral blood mononuclear cells (PBMCs) using qPCR. aTL significantly shortened with age for all tissues except saliva and buffy coat, although buffy coat was available for a restricted age range (8 to 15 years). aTL did not significantly differ across blood-based tissues (DBS, buffy coat, PBMC), which had significantly longer aTL than buccal cells and saliva. Additionally, aTL was significantly correlated for the majority of tissue pairs, with partial Spearman's correlations controlling for age and sex ranging from ⍴ = 0.18 to 0.51. We also measured quality metrics of DNA including integrity, purity, and quantity of extracted DNA from all tissues and explored whether controlling for DNA metrics improved predictions of aTL. We found significant tissue variation: DNA from blood-based tissues had high DNA integrity, more acceptable A260/280 and A260/230 values, and greater extracted DNA concentrations compared to buccal cells and saliva. Longer aTL was associated with lower DNA integrity, higher extracted DNA concentrations, and higher A260/230, particularly for saliva. Model comparisons suggested that incorporation of quality DNA metrics improves models of TL, although relevant metrics vary by tissue. These findings highlight the merits of using blood-based tissues and suggest that incorporation of quality DNA metrics as control variables in population-based studies can improve TL predictions, especially for more variable tissues like buccal and saliva.
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Affiliation(s)
- Sarah E. Wolf
- Department of Biobehavioral Health, Penn State University, University Park, Pennsylvania, United States of America
| | - Waylon J. Hastings
- Department of Biobehavioral Health, Penn State University, University Park, Pennsylvania, United States of America
- Department of Psychiatry and Behavioral Science, Tulane University School of Medicine, New Orleans, Louisiana, United States of America
| | - Qiaofeng Ye
- Department of Biobehavioral Health, Penn State University, University Park, Pennsylvania, United States of America
| | - Laura Etzel
- Department of Biobehavioral Health, Penn State University, University Park, Pennsylvania, United States of America
| | - Abner T. Apsley
- Department of Biobehavioral Health, Penn State University, University Park, Pennsylvania, United States of America
| | - Christopher Chiaro
- Department of Biobehavioral Health, Penn State University, University Park, Pennsylvania, United States of America
| | - Christine C. Heim
- Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, and Humboldt-Universität zu Berlin, Berlin Institute of Health, Institute of Medical Psychology, Berlin, Germany
| | - Thomas Heller
- Department of Biobehavioral Health, Penn State University, University Park, Pennsylvania, United States of America
| | - Jennie G. Noll
- Department of Psychology, University of Rochester, Rochester, NY, United States of America
- Department of Human Development and Family Studies, The Pennsylvania State University, University Park, PA, United States of America
| | - Hannah M. C. Schreier
- Department of Biobehavioral Health, Penn State University, University Park, Pennsylvania, United States of America
| | - Chad E. Shenk
- Department of Human Development and Family Studies, The Pennsylvania State University, University Park, PA, United States of America
- Department of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA, United States of America
| | - Idan Shalev
- Department of Biobehavioral Health, Penn State University, University Park, Pennsylvania, United States of America
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12
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Park HH, Kwon HS, Lee KY, Kim YE, Son JW, Choi NY, Han MH, Park DW, Kim S, Koh SH. GV1001 reduces neurodegeneration and prolongs lifespan in 3xTg-AD mouse model through anti-aging effects. Aging (Albany NY) 2024; 16:1983-2004. [PMID: 38301041 PMCID: PMC10911355 DOI: 10.18632/aging.205489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 01/02/2024] [Indexed: 02/03/2024]
Abstract
GV1001, which mimics the activity of human telomerase reverse transcriptase, protects neural cells from amyloid beta (Aβ) toxicity and other stressors through extra-telomeric function, as noted in our prior in vitro studies. As per a recent phase II clinical trial, it improves cognitive function in patients with moderate to severe dementia. However, the underlying protective mechanisms remain unclear. This study aimed to investigate the effects of GV1001 on neurodegeneration, senescence, and survival in triple transgenic Alzheimer's disease (3xTg-AD) mice. GV1001 (1 mg/kg) was subcutaneously injected into old 3xTg-AD mice thrice a week until the endpoint for sacrifice, and survival was analysed. Magnetic resonance imaging (MRI) and Prussian blue staining (PBS) were performed to evaluate entry of GV1001 entrance into the brain. Diverse molecular studies were performed to investigate the effect of GV1001 on neurodegeneration and cellular senescence in AD model mice, with a particular focus on BACE, amyloid beta1-42 (Aβ1-42), phosphorylated tau, volume of dentate gyrus, β-galactosidase positive cells, telomere length, telomerase activity, and ageing-associated proteins. GV1001 crossed the blood-brain barrier, as confirmed by assessing the status of ferrocenecarboxylic acid-conjugated GV1001 using magnetic resonance imaging and PBS. GV1001 increased the survival of 3xTg-AD mice. It decreased BACE and Aβ1-42 levels, neurodegeneration (i.e., reduced CA1, CA3 and dentate gyrus volume, decreased levels of senescence-associated β-galactosidase positive cells, and increased telomere length and telomerase activity), and levels of ageing-associated proteins. We suggest that GV1001 exerts anti-ageing effects in 3xTg-AD mice by reducing neurodegeneration and senescence, which contributes to improved survival.
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Affiliation(s)
- Hyun-Hee Park
- Department of Neurology, Hanyang University Guri Hospital, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, Korea
| | - Hyuk Sung Kwon
- Department of Neurology, Hanyang University Guri Hospital, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, Korea
| | - Kyu-Yong Lee
- Department of Neurology, Hanyang University Guri Hospital, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, Korea
| | - Ye Eun Kim
- Department of Neurology, Hanyang University Guri Hospital, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, Korea
| | - Jeong-Woo Son
- Department of Neurology, Hanyang University Guri Hospital, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, Korea
| | - Na-Young Choi
- Department of Neurology, Hanyang University Guri Hospital, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, Korea
| | - Myung-Hoon Han
- Department of Neurosurgery, Hanyang University Guri Hospital, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, Korea
| | - Dong Woo Park
- Department of Radiology, Hanyang University Guri Hospital, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, Korea
| | | | - Seong-Ho Koh
- Department of Neurology, Hanyang University Guri Hospital, Gyeongchun-ro, Guri-si, Gyeonggi-do 11923, Korea
- Department of Translational Medicine, Hanyang University Graduate School of Biomedical Science and Engineering, Seoul 04763, Korea
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13
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Medoro A, Saso L, Scapagnini G, Davinelli S. NRF2 signaling pathway and telomere length in aging and age-related diseases. Mol Cell Biochem 2023:10.1007/s11010-023-04878-x. [PMID: 37917279 DOI: 10.1007/s11010-023-04878-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Accepted: 10/07/2023] [Indexed: 11/04/2023]
Abstract
The transcription factor nuclear factor erythroid 2-related factor 2 (NRF2) is well recognized as a critical regulator of redox, metabolic, and protein homeostasis, as well as the regulation of inflammation. An age-associated decline in NRF2 activity may allow oxidative stress to remain unmitigated and affect key features associated with the aging phenotype, including telomere shortening. Telomeres, the protective caps of eukaryotic chromosomes, are highly susceptible to oxidative DNA damage, which can accelerate telomere shortening and, consequently, lead to premature senescence and genomic instability. In this review, we explore how the dysregulation of NRF2, coupled with an increase in oxidative stress, might be a major determinant of telomere shortening and age-related diseases. We discuss the relevance of the connection between NRF2 deficiency in aging and telomere attrition, emphasizing the importance of studying this functional link to enhance our understanding of aging pathologies. Finally, we present a number of compounds that possess the ability to restore NRF2 function, maintain a proper redox balance, and preserve telomere length during aging.
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Affiliation(s)
- Alessandro Medoro
- Department of Medicine and Health Sciences "V. Tiberio", University of Molise, Via F. De Sanctis, s.n.c., 86100, Campobasso, Italy
| | - Luciano Saso
- Department of Physiology and Pharmacology "Vittorio Erspamer", Sapienza University of Rome, Rome, Italy
| | - Giovanni Scapagnini
- Department of Medicine and Health Sciences "V. Tiberio", University of Molise, Via F. De Sanctis, s.n.c., 86100, Campobasso, Italy
| | - Sergio Davinelli
- Department of Medicine and Health Sciences "V. Tiberio", University of Molise, Via F. De Sanctis, s.n.c., 86100, Campobasso, Italy.
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14
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Crocco P, De Rango F, Dato S, La Grotta R, Maletta R, Bruni AC, Passarino G, Rose G. The Shortening of Leukocyte Telomere Length Contributes to Alzheimer's Disease: Further Evidence from Late-Onset Familial and Sporadic Cases. BIOLOGY 2023; 12:1286. [PMID: 37886996 PMCID: PMC10604697 DOI: 10.3390/biology12101286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 09/21/2023] [Accepted: 09/25/2023] [Indexed: 10/28/2023]
Abstract
Telomeres are structures at the ends of eukaryotic chromosomes that help maintain genomic stability. During aging, telomere length gradually shortens, producing short telomeres, which are markers of premature cellular senescence. This may contribute to age-related diseases, including Alzheimer's disease (AD), and based on this, several studies have hypothesized that telomere shortening may characterize AD. Current research, however, has been inconclusive regarding the direction of the association between leukocyte telomere length (LTL) and disease risk. We assessed the association between LTL and AD in a retrospective case-control study of a sample of 255 unrelated patients with late-onset AD (LOAD), including 120 sporadic cases and 135 with positive family history for LOAD, and a group of 279 cognitively healthy unrelated controls, who were all from Calabria, a southern Italian region. Following regression analysis, telomeres were found significantly shorter in LOAD cases than in controls (48% and 41% decrease for sporadic and familial cases, respectively; p < 0.001 for both). Interestingly, LTL was associated with disease risk independently of the presence of conventional risk factors (e.g., age, sex, MMSE scores, and the presence of the APOE-ε4 allele). Altogether, our findings lend support to the notion that LTL shortening may be an indicator of the pathogenesis of LOAD.
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Affiliation(s)
- Paolina Crocco
- Department of Biology, Ecology and Earth Sciences, University of Calabria, 87036 Rende, Italy; (P.C.); (F.D.R.); (S.D.); (R.L.G.); (G.P.)
| | - Francesco De Rango
- Department of Biology, Ecology and Earth Sciences, University of Calabria, 87036 Rende, Italy; (P.C.); (F.D.R.); (S.D.); (R.L.G.); (G.P.)
| | - Serena Dato
- Department of Biology, Ecology and Earth Sciences, University of Calabria, 87036 Rende, Italy; (P.C.); (F.D.R.); (S.D.); (R.L.G.); (G.P.)
| | - Rossella La Grotta
- Department of Biology, Ecology and Earth Sciences, University of Calabria, 87036 Rende, Italy; (P.C.); (F.D.R.); (S.D.); (R.L.G.); (G.P.)
| | - Raffaele Maletta
- Regional Neurogenetic Centre, ASP Catanzaro, 88046 Lamezia Terme, Italy; (R.M.); (A.C.B.)
| | - Amalia Cecilia Bruni
- Regional Neurogenetic Centre, ASP Catanzaro, 88046 Lamezia Terme, Italy; (R.M.); (A.C.B.)
| | - Giuseppe Passarino
- Department of Biology, Ecology and Earth Sciences, University of Calabria, 87036 Rende, Italy; (P.C.); (F.D.R.); (S.D.); (R.L.G.); (G.P.)
| | - Giuseppina Rose
- Department of Biology, Ecology and Earth Sciences, University of Calabria, 87036 Rende, Italy; (P.C.); (F.D.R.); (S.D.); (R.L.G.); (G.P.)
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15
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Lynch MT, Taub MA, Farfel JM, Yang J, Abadir P, De Jager PL, Grodstein F, Bennett DA, Mathias RA. Evaluating genomic signatures of aging in brain tissue as it relates to Alzheimer's disease. Sci Rep 2023; 13:14747. [PMID: 37679407 PMCID: PMC10484923 DOI: 10.1038/s41598-023-41400-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 08/25/2023] [Indexed: 09/09/2023] Open
Abstract
Telomere length (TL) attrition, epigenetic age acceleration, and mitochondrial DNA copy number (mtDNAcn) decline are established hallmarks of aging. Each has been individually associated with Alzheimer's dementia, cognitive function, and pathologic Alzheimer's disease (AD). Epigenetic age and mtDNAcn have been studied in brain tissue directly but prior work on TL in brain is limited to small sample sizes and most studies have examined leukocyte TL. Importantly, TL, epigenetic age clocks, and mtDNAcn have not been studied jointly in brain tissue from an AD cohort. We examined dorsolateral prefrontal cortex (DLPFC) tissue from N = 367 participants of the Religious Orders Study (ROS) or the Rush Memory and Aging Project (MAP). TL and mtDNAcn were estimated from whole genome sequencing (WGS) data and cortical clock age was computed on 347 CpG sites. We examined dementia, MCI, and level of and change in cognition, pathologic AD, and three quantitative AD traits, as well as measures of other neurodegenerative diseases and cerebrovascular diseases (CVD). We previously showed that mtDNAcn from DLPFC brain tissue was associated with clinical and pathologic features of AD. Here, we show that those associations are independent of TL. We found TL to be associated with β-amyloid levels (beta = - 0.15, p = 0.023), hippocampal sclerosis (OR = 0.56, p = 0.0015) and cerebral atherosclerosis (OR = 1.44, p = 0.0007). We found strong associations between mtDNAcn and clinical measures of AD. The strongest associations with pathologic measures of AD were with cortical clock and there were associations of mtDNAcn with global AD pathology and tau tangles. Of the other pathologic traits, mtDNAcn was associated with hippocampal sclerosis, macroscopic infarctions and CAA and cortical clock was associated with Lewy bodies. Multi-modal age acceleration, accelerated aging on both mtDNAcn and cortical clock, had greater effect size than a single measure alone. These findings highlight for the first time that age acceleration determined on multiple genomic measures, mtDNAcn and cortical clock may have a larger effect on AD/AD related disorders (ADRD) pathogenesis than single measures.
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Affiliation(s)
- Megan T Lynch
- Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Margaret A Taub
- Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Jose M Farfel
- Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA
| | - Jingyun Yang
- Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA
| | - Peter Abadir
- Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Philip L De Jager
- Center for Translational and Computational Neuroimmunology, Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA
| | - Francine Grodstein
- Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA
| | - David A Bennett
- Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA
| | - Rasika A Mathias
- Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, MD, USA.
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16
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Volobaev VP, Kunizheva SS, Uralsky LI, Kupriyanova DA, Rogaev EI. Quantifying human genome parameters in aging. Vavilovskii Zhurnal Genet Selektsii 2023; 27:495-501. [PMID: 37808212 PMCID: PMC10551942 DOI: 10.18699/vjgb-23-60] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 02/07/2023] [Accepted: 02/07/2023] [Indexed: 10/10/2023] Open
Abstract
Healthy human longevity is a global goal of the world health system. Determining the causes and processes influencing human longevity is the primary fundamental goal facing the scientific community. Currently, the main efforts of the scientific community are aimed at identifying the qualitative characteristics of the genome that determine the trait. At the same time, when evaluating qualitative characteristics, there are many challenges that make it difficult to establish associations. Quantitative traits are burdened with such problems to a lesser extent, but they are largely overlooked in current genomic studies of aging and longevity. Although there is a wide repertoire of quantitative trait analyses based on genomic data, most opportunities are ignored by authors, which, along with the inaccessibility of published data, leads to the loss of this important information. This review focuses on describing quantitative traits important for understanding aging and necessary for analysis in further genomic studies, and recommends the inclusion of the described traits in the analysis. The review considers the relationship between quantitative characteristics of the mitochondrial genome and aging, longevity, and age-related neurodegenerative diseases, such as the frequency of extensive mitochondrial DNA (mtDNA) deletions, mtDNA half-life, the frequency of A>G replacements in the mtDNA heavy chain, the number of mtDNA copies; special attention is paid to the mtDNA methylation sign. A separate section of this review is devoted to the correlation of telomere length parameters with age, as well as the association of telomere length with the amount of mitochondrial DNA. In addition, we consider such a quantitative feature as the rate of accumulation of somatic mutations with aging in relation to the lifespan of living organisms. In general, it may be noted that there are quite serious reasons to suppose that various quantitative characteristics of the genome may be directly or indirectly associated with certain aspects of aging and longevity. At the same time, the available data are clearly insufficient for definitive conclusions and the determination of causal relationships.
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Affiliation(s)
- V P Volobaev
- Sirius University of Science and Technology, Scientific Center for Genetics and Life Sciences, Sochi, Russia
| | - S S Kunizheva
- Sirius University of Science and Technology, Scientific Center for Genetics and Life Sciences, Sochi, Russia Vavilov Institute of General Genetics, Russian Academy of Sciences, Department of Genomics and Human Genetics, Moscow, Russia Lomonosov Moscow State University, Center for Genetics and Genetic Technologies, Faculty of Biology, Moscow, Russia
| | - L I Uralsky
- Sirius University of Science and Technology, Scientific Center for Genetics and Life Sciences, Sochi, Russia Vavilov Institute of General Genetics, Russian Academy of Sciences, Department of Genomics and Human Genetics, Moscow, Russia
| | - D A Kupriyanova
- Sirius University of Science and Technology, Scientific Center for Genetics and Life Sciences, Sochi, Russia
| | - E I Rogaev
- Sirius University of Science and Technology, Scientific Center for Genetics and Life Sciences, Sochi, Russia Vavilov Institute of General Genetics, Russian Academy of Sciences, Department of Genomics and Human Genetics, Moscow, Russia Lomonosov Moscow State University, Center for Genetics and Genetic Technologies, Faculty of Biology, Moscow, Russia University of Massachusetts Chan Medical School, Department of Psychiatry, Shrewsbury, USA
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17
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Wolf SE, Shalev I. The shelterin protein expansion of telomere dynamics: Linking early life adversity, life history, and the hallmarks of aging. Neurosci Biobehav Rev 2023; 152:105261. [PMID: 37268182 PMCID: PMC10527177 DOI: 10.1016/j.neubiorev.2023.105261] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 04/10/2023] [Accepted: 05/30/2023] [Indexed: 06/04/2023]
Abstract
Aging is characterized by functional decline occurring alongside changes to several hallmarks of aging. One of the hallmarks includes attrition of repeated DNA sequences found at the ends of chromosomes called telomeres. While telomere attrition is linked to morbidity and mortality, whether and how it causally contributes to lifelong rates of functional decline is unclear. In this review, we propose the shelterin-telomere hypothesis of life history, in which telomere-binding shelterin proteins translate telomere attrition into a range of physiological outcomes, the extent of which may be modulated by currently understudied variation in shelterin protein levels. Shelterin proteins may expand the breadth and timing of consequences of telomere attrition, e.g., by translating early life adversity into acceleration of the aging process. We consider how the pleiotropic roles of shelterin proteins provide novel insights into natural variation in physiology, life history, and lifespan. We highlight key open questions that encourage the integrative, organismal study of shelterin proteins that enhances our understanding of the contribution of the telomere system to aging.
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Affiliation(s)
- Sarah E Wolf
- Department of Biobehavioral Health, Penn State University, University Park, PA 16802, USA.
| | - Idan Shalev
- Department of Biobehavioral Health, Penn State University, University Park, PA 16802, USA
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18
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Liu C, Ding K, Abdul M, Sun QC, Zhang ZF, Dong MM, Han L, Dai MS, Guan HL, Han Y, Liu H, Chen XF, Cao JL. The relationship between longer leukocyte telomeres and dNCR in non-cardiac surgery patients: a retrospective analysis. BMC Anesthesiol 2023; 23:284. [PMID: 37608257 PMCID: PMC10463441 DOI: 10.1186/s12871-023-02183-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 06/16/2023] [Indexed: 08/24/2023] Open
Abstract
BACKGROUND Cognitive decline following surgery is a common concern among elderly individuals. Leukocyte telomere length (LTL) can be assessed as a biological clock connected to an individual lifespan. However, the mechanisms causing this inference are still not fully understood. As a result of this, LTL has the potential to be useful as an aging-related biomarker for assessing delayed neurocognitive recovery (dNCR) and related diseases. METHODS For this study, 196 individuals over 60 who were scheduled due to major non-cardiac surgical operations attended neuropsychological testing before surgery, followed by additional testing one week later. The finding of dNCR was based on a measured Z-score ≤ -1.96 on two or more separate tests. The frequency of dNCR was presented as the primary outcome of the study. Secondly, we evaluated the association between dNCR and preoperative LTL. RESULTS Overall, 20.4% [40/196; 95% confidence interval (CI), 14.7-26.1%] of patients exhibited dNCR 1-week post-surgery. Longer LTL was identified as a predictor for the onset of early cognitive impairment resulting in postoperative cognitive decline [odds ratio (OR), 14.82; 95% CI, 4.01-54.84; P < 0.001], following adjustment of age (OR, 12.33; 95% CI, 3.29-46.24; P < 0.001). The dNCR incidence based on LTL values of these patients, the area under the receiver operating characteristic (ROC) curve was 0.79 (95% CI, 0.722-0.859; P < 0.001). At an optimal cut-off value of 0.959, LTL values offered respective specificity and sensitivity values of 64.7% and 87.5%. CONCLUSIONS In summary, the current study revealed that the incidence of dNCR was strongly associated with prolonged LTL. Furthermore, this biomarker could help identify high-risk patients and offer insight into the pathophysiology of dNCR.
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Affiliation(s)
- Chen Liu
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, NO. 209 Tongshan Road, Yunlong District, Xuzhou City, 221004 Jiangsu Province China
- Department of Anesthesiology, Zhongda Hospital Southeast University, No. 87 Dingjiaqiao Road, Gulou District, Nanjing City, 210009 Jiangsu Province China
| | - Ke Ding
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, NO. 209 Tongshan Road, Yunlong District, Xuzhou City, 221004 Jiangsu Province China
- Department of Anesthesiology, Nanjing First Hospital, Nanjing Medical University, No. 68 Changle Road, Qinhuai, District, Nanjing, 210006 Jiangsu Province China
| | - Mannan Abdul
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, NO. 209 Tongshan Road, Yunlong District, Xuzhou City, 221004 Jiangsu Province China
- Department of Anesthesiology, Eye & ENT Hospital of Fudan University, NO. 83 Fengyang Road, Xuhui District, Shanghai City, 20031 Shanghai China
| | - Qing-Chun Sun
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, NO. 209 Tongshan Road, Yunlong District, Xuzhou City, 221004 Jiangsu Province China
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, NO. 300 Guangzhou Road, Gulou District, Nanjing CityJiangsu Province, 210015 China
| | - Zhen-Feng Zhang
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, NO. 209 Tongshan Road, Yunlong District, Xuzhou City, 221004 Jiangsu Province China
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, NO. 300 Guangzhou Road, Gulou District, Nanjing CityJiangsu Province, 210015 China
| | - Meng-Meng Dong
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, NO. 209 Tongshan Road, Yunlong District, Xuzhou City, 221004 Jiangsu Province China
- Department of Anesthesiology, The Affiliated Hospital of Xuzhou Medical University, NO. 99 Huaihai Road, Quanshan District, Xuzhou City, 221002 Jiangsu Province China
| | - Liu Han
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, NO. 209 Tongshan Road, Yunlong District, Xuzhou City, 221004 Jiangsu Province China
| | - Ming-Sheng Dai
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, NO. 209 Tongshan Road, Yunlong District, Xuzhou City, 221004 Jiangsu Province China
| | - Hui-Lian Guan
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, NO. 209 Tongshan Road, Yunlong District, Xuzhou City, 221004 Jiangsu Province China
| | - Yuan Han
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, NO. 209 Tongshan Road, Yunlong District, Xuzhou City, 221004 Jiangsu Province China
- Department of Anesthesiology, Eye & ENT Hospital of Fudan University, NO. 83 Fengyang Road, Xuhui District, Shanghai City, 20031 Shanghai China
| | - He Liu
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, NO. 209 Tongshan Road, Yunlong District, Xuzhou City, 221004 Jiangsu Province China
- Department of Anesthesiology, Affiliated Huzhou Hospital, Zhejiang University School of Medicine & Huzhou Central Hospital, Huzhou City, 313003 Zhejiang Province China
| | - Xue-Fen Chen
- Department of Epidemiology and Health Statistics, School of Public Health, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203 China
| | - Jun-Li Cao
- Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, NO. 209 Tongshan Road, Yunlong District, Xuzhou City, 221004 Jiangsu Province China
- Department of Anesthesiology, The Affiliated Hospital of Xuzhou Medical University, NO. 99 Huaihai Road, Quanshan District, Xuzhou City, 221002 Jiangsu Province China
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19
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Kuan XY, Fauzi NSA, Ng KY, Bakhtiar A. Exploring the Causal Relationship Between Telomere Biology and Alzheimer's Disease. Mol Neurobiol 2023; 60:4169-4183. [PMID: 37046137 PMCID: PMC10293431 DOI: 10.1007/s12035-023-03337-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 04/03/2023] [Indexed: 04/14/2023]
Abstract
Telomeres, also known as the "protective caps" of our chromosomes, shorten with each cell cycle due to the end replication problem. This process, termed telomere attrition, is associated with many age-related disorders, such as Alzheimer's disease (AD). Despite the numerous studies conducted in this field, the role of telomere attrition in the onset of the disease remains unclear. To investigate the causal relationship between short telomeres and AD, this review aims to highlight the primary factors that regulate telomere length and maintain its integrity, with an additional outlook on the role of oxidative stress, which is commonly associated with aging and molecular damage. Although some findings thus far might be contradictory, telomere attrition likely plays a crucial role in the progression of AD due to its close association with oxidative stress. The currently available treatments for AD are only symptomatic without affecting the progression of the disease. The components of telomere biology discussed in this paper have previously been studied as an alternative treatment option for several diseases and have exhibited promising in vitro and in vivo results. Hence, this should provide a basis for future research to develop a potential therapeutic strategy for AD. (Created with BioRender.com).
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Affiliation(s)
- Xi-Yuen Kuan
- School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor, Malaysia
| | - Nurul Syahira Ahmad Fauzi
- School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor, Malaysia
| | - Khuen Yen Ng
- School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor, Malaysia
| | - Athirah Bakhtiar
- School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor, Malaysia.
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20
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Holloway K, Neherin K, Dam KU, Zhang H. Cellular senescence and neurodegeneration. Hum Genet 2023; 142:1247-1262. [PMID: 37115318 DOI: 10.1007/s00439-023-02565-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Accepted: 04/20/2023] [Indexed: 04/29/2023]
Abstract
Advancing age is a major risk factor of Alzheimer's disease (AD). The worldwide prevalence of AD is approximately 50 million people, and this number is projected to increase substantially. The molecular mechanisms underlying the aging-associated susceptibility to cognitive impairment in AD are largely unknown. As a hallmark of aging, cellular senescence is a significant contributor to aging and age-related diseases including AD. Senescent neurons and glial cells have been detected to accumulate in the brains of AD patients and mouse models. Importantly, selective elimination of senescent cells ameliorates amyloid beta and tau pathologies and improves cognition in AD mouse models, indicating a critical role of cellular senescence in AD pathogenesis. Nonetheless, the mechanisms underlying when and how cellular senescence contributes to AD pathogenesis remain unclear. This review provides an overview of cellular senescence and discusses recent advances in the understanding of the impact of cellular senescence on AD pathogenesis, with brief discussions of the possible role of cellular senescence in other neurodegenerative diseases including Down syndrome, Parkinson's disease, multiple sclerosis, and amyotrophic lateral sclerosis.
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Affiliation(s)
- Kristopher Holloway
- Department of Pediatrics, University of Massachusetts Chan Medical School, Worcester, MA, 01655, USA
| | - Kashfia Neherin
- Department of Pediatrics, University of Massachusetts Chan Medical School, Worcester, MA, 01655, USA
| | - Kha Uyen Dam
- Department of Pediatrics, University of Massachusetts Chan Medical School, Worcester, MA, 01655, USA
| | - Hong Zhang
- Department of Pediatrics, University of Massachusetts Chan Medical School, Worcester, MA, 01655, USA.
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21
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Wu T, Qu Y, Xu S, Wang Y, Liu X, Ma D. SIRT6: A potential therapeutic target for diabetic cardiomyopathy. FASEB J 2023; 37:e23099. [PMID: 37462453 DOI: 10.1096/fj.202301012r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 06/26/2023] [Accepted: 07/05/2023] [Indexed: 07/21/2023]
Abstract
The abnormal lipid metabolism in diabetic cardiomyopathy can cause myocardial mitochondrial dysfunction, lipotoxicity, abnormal death of myocardial cells, and myocardial remodeling. Mitochondrial homeostasis and normal lipid metabolism can effectively slow down the development of diabetic cardiomyopathy. Recent studies have shown that SIRT6 may play an important role in the pathological changes of diabetic cardiomyopathy such as myocardial cell death, myocardial hypertrophy, and myocardial fibrosis by regulating mitochondrial oxidative stress and glucose and lipid metabolism. Therefore, understanding the function of SIRT6 and its role in the pathogenesis of diabetic cardiomyopathy is of great significance for exploring and developing new targets and drugs for the treatment of diabetic cardiomyopathy. This article reviews the latest findings of SIRT6 in the pathogenesis of diabetic cardiomyopathy, focusing on the regulation of mitochondria and lipid metabolism by SIRT6 to explore potential clinical treatments.
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Affiliation(s)
- Tao Wu
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Yiwei Qu
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Shengjie Xu
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Yong Wang
- Department of Cardiology, Shandong University of Traditional Chinese Medicine Affiliated Hospital, Jinan, China
| | - Xue Liu
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Dufang Ma
- Department of Cardiology, Shandong University of Traditional Chinese Medicine Affiliated Hospital, Jinan, China
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22
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Lai KY, Webster C, Kumari S, Gallacher JEJ, Sarkar C. The associations of socioeconomic status with incident dementia and Alzheimer's disease are modified by leucocyte telomere length: a population-based cohort study. Sci Rep 2023; 13:6163. [PMID: 37061546 PMCID: PMC10105714 DOI: 10.1038/s41598-023-32974-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 04/05/2023] [Indexed: 04/17/2023] Open
Abstract
Socio-economic status (SES) and biological aging are risk factors for dementia, including Alzheimer's disease, however, it is less clear if the associations with SES vary sufficiently across different biological age strata. We used data from 331,066 UK Biobank participants aged 38-73 with mean follow-up of 12 years to examine if associations between SES (assessed by educational attainment, employment status and household income) and dementia and Alzheimer's disease are modified by biological age (assessed by leucocyte telomere length: LTL). Diagnosis of events was ascertained through hospital admissions data. Cox regressions were used to estimate hazard ratios [HRs]. A consistent dose-response relationship was found, with participants in low SES and shorter LTL strata (double-exposed group) reporting 3.28 (95% confidence interval [CI] 2.57-4.20) and 3.44 (95% CI 2.35-5.04) times higher risks of incident dementia and Alzheimer's disease respectively, compared to those of high SES and longer LTL (least-exposed group). Of interest is a synergistic interaction between SES and LTL to increase risk of dementia (RERI 0.57, 95% CI 0.07-1.06) and Alzheimer's disease (RERI 0.79, 95% CI 0.02-1.56). Our findings that SES and biological age (LTL) are synergistic risk factors of dementia and Alzheimer's disease may suggest the need to target interventions among vulnerable sub-groups.
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Affiliation(s)
- Ka Yan Lai
- Healthy High Density Cities Lab, HKUrbanLab, The University of Hong Kong, Knowles Building, Pokfulam Road, Hong Kong Special Administrative Region, China
- Department of Urban Planning and Design, The University of Hong Kong, Knowles Building, Pokfulam Road, Hong Kong Special Administrative Region, China
| | - Chris Webster
- Healthy High Density Cities Lab, HKUrbanLab, The University of Hong Kong, Knowles Building, Pokfulam Road, Hong Kong Special Administrative Region, China
- Department of Urban Planning and Design, The University of Hong Kong, Knowles Building, Pokfulam Road, Hong Kong Special Administrative Region, China
| | - Sarika Kumari
- Healthy High Density Cities Lab, HKUrbanLab, The University of Hong Kong, Knowles Building, Pokfulam Road, Hong Kong Special Administrative Region, China
| | - John E J Gallacher
- Dementias Platform UK, Department of Psychiatry, Warneford Hospital, University of Oxford, Oxford, OX3 7JX, UK
| | - Chinmoy Sarkar
- Healthy High Density Cities Lab, HKUrbanLab, The University of Hong Kong, Knowles Building, Pokfulam Road, Hong Kong Special Administrative Region, China.
- Department of Urban Planning and Design, The University of Hong Kong, Knowles Building, Pokfulam Road, Hong Kong Special Administrative Region, China.
- Dementias Platform UK, Department of Psychiatry, Warneford Hospital, University of Oxford, Oxford, OX3 7JX, UK.
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23
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Beijers R, Ten Thije I, Bolhuis E, O'Donnell KJ, Tollenaar MS, Shalev I, Hastings WJ, MacIsaac JL, Lin DTS, Meaney M, Kobor MS, Belsky J, de Weerth C. Cumulative risk exposure and child cellular aging in a Dutch low-risk community sample. Psychophysiology 2023; 60:e14205. [PMID: 36323627 DOI: 10.1111/psyp.14205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 10/07/2022] [Accepted: 10/10/2022] [Indexed: 11/06/2022]
Abstract
One of the proposed mechanisms linking childhood stressor exposure to negative mental and physical health outcomes in later life is cellular aging. In this prospective, longitudinal, and pre-registered study, we examined the association between a cumulative pattern of childhood risk exposure from age 6 to age 10 (i.e., poor maternal mental health, parental relationship problems, family/friend death, bullying victimization, poor quality friendships) and change in two biomarkers of cellular aging (i.e., telomere length, epigenetic age) from age 6 to age 10 in a Dutch low-risk community sample (n = 193). We further examined the moderating effect of cortisol reactivity at age 6. Ordinary Least Squares regression analyses revealed no significant main effects of childhood risk exposure on change in cellular aging, nor a moderation effect of child cortisol reactivity. Secondary findings showed a positive correlation between telomere length and cortisol reactivity at age 6, warranting further investigation. More research in similar communities is needed before drawing strong conclusions based on the null results.
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Affiliation(s)
- Roseriet Beijers
- Department of Social Development, Behavioral Science Institute, Radboud University, Nijmegen, The Netherlands
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Ilse Ten Thije
- Department of Social Development, Behavioral Science Institute, Radboud University, Nijmegen, The Netherlands
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Emma Bolhuis
- Department of Social Development, Behavioral Science Institute, Radboud University, Nijmegen, The Netherlands
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Kieran J O'Donnell
- Yale Child Study Center & Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University, New Haven, Connecticut, USA
- Douglas Hospital Research Centre, Department of Psychiatry, McGill University, Montreal, Canada
| | - Marieke S Tollenaar
- Leiden Institute for Brain and Cognition and Institute of Psychology, Leiden University, Leiden, The Netherlands
| | - Idan Shalev
- Department of Biobehavioral Health, Penn State University, State College, Pennsylvania, USA
| | - Waylon J Hastings
- Department of Biobehavioral Health, Penn State University, State College, Pennsylvania, USA
| | - Julia L MacIsaac
- Department of Medical Genetics, University of British Columbia, BC Children's Hospital Research Institute, Vancouver, Canada
| | - David T S Lin
- Department of Medical Genetics, University of British Columbia, BC Children's Hospital Research Institute, Vancouver, Canada
| | - Michael Meaney
- Douglas Mental Health University Institute, McGill University, Montreal, Canada
| | - Michael S Kobor
- Department of Medical Genetics, University of British Columbia, BC Children's Hospital Research Institute, Vancouver, Canada
| | - Jay Belsky
- Department of Human Ecology, University of California, California, Davis, USA
| | - Carolina de Weerth
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, Nijmegen, The Netherlands
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PerezGrovas-Saltijeral A, Ochoa-Morales A, Jara-Prado A, Velázquez-Cruz R, Rivera-Paredez B, Dávila-OrtizdeMontellano D, Benítez-Alonso EO, Santamaría-Olmedo M, Sevilla-Montoya R, Marfil-Marín E, Valdés-Flores M, Martínez-Ruano L, Camacho-Molina A, Hidalgo-Bravo A. Unraveling the role of relative telomere length and CAG expansion on initial symptoms of juvenile Huntington disease. Eur J Neurol 2023; 30:612-621. [PMID: 36421025 DOI: 10.1111/ene.15644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 11/21/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND AND PURPOSE Juvenile-onset Huntington disease (JHD) is defined when symptoms initiate before 20 years of age. Mechanisms explaining differences between juvenile and adult onset are not fully understood. Our aim was to analyze the distribution of initial symptoms in a cohort of JHD patients and to explore its relationship with CAG expansion and relative telomere length (RTL). METHODS A total of 84 JHD patients and 54 neurologically healthy age and sex matched individuals were recruited. CAG length was measured by southern blot or triplet repeat primed polymerase chain reaction. RTL was measured using the Cawthon method. RESULTS Psychiatric symptoms were most frequent when considering the entire cohort. When divided into onset before or after 10 years, cognitive symptoms were more frequent in the youngest, whilst in the older group psychiatric symptoms prevailed. Motor symptoms were rare in the youngest and epilepsy was observed only in this group as well as a larger CAG expansion. RTL analysis revealed shorter telomeres in JHD patients compared to controls. This difference is not influenced by age, initial symptoms, time of disease or CAG expansion. CONCLUSIONS To the best of our knowledge this is the largest cohort of JHD patients reported. Psychiatric manifestations deserve special attention when JHD is suspected and epilepsy is especially important in the youngest patients. Initial symptoms seem to be influenced by CAG expansion and therefore age of onset. RTL is significantly reduced in JHD patients which can influence the characteristic neurodegeneration of JHD and contribute to the clinical discrepancy between adult and juvenile forms of Huntington disease.
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Affiliation(s)
| | - Adriana Ochoa-Morales
- Department of Neurogenetics, National Institute of Neurology and Neurosurgery, Mexico City, Mexico
| | - Aurelio Jara-Prado
- Department of Neurogenetics, National Institute of Neurology and Neurosurgery, Mexico City, Mexico
| | - Rafael Velázquez-Cruz
- Genomics of Bone Metabolism Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City, Mexico
| | - Berenice Rivera-Paredez
- Research Center in Policies, Population and Health, School of Medicine, National Autonomous University of Mexico (UNAM), Mexico City, Mexico
| | | | - Edmar O Benítez-Alonso
- Department of Neurogenetics, National Institute of Neurology and Neurosurgery, Mexico City, Mexico
| | | | - Rosalba Sevilla-Montoya
- Department of Genetics and Human Genomics, National Institute of Perinatology, Mexico City, Mexico
| | | | | | - Leticia Martínez-Ruano
- Department of Neurogenetics, National Institute of Neurology and Neurosurgery, Mexico City, Mexico
| | - Alejandra Camacho-Molina
- Department of Neurogenetics, National Institute of Neurology and Neurosurgery, Mexico City, Mexico
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25
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Ren G, Song S, Zhang SX, Liu Y, Lv Y, Wang YH, Zhao R, Li XY. Brain region-specific genome-wide deoxyribonucleic acid methylation analysis in patients with Alzheimer's disease. Front Mol Neurosci 2023; 16:971565. [PMID: 37122620 PMCID: PMC10133508 DOI: 10.3389/fnmol.2023.971565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 01/16/2023] [Indexed: 05/02/2023] Open
Abstract
Objective Alzheimer's disease (AD) is a neurodegenerative disease characterized by neuropathology and cognitive decline and associated with age. The comprehensive deoxyribonucleic acid methylation (DNAm)-transcriptome profile association analysis conducted in this study aimed to establish whole-genome DNAm profiles and explore DNAm-related genes and their potential functions. More appropriate biomarkers were expected to be identified in terms of AD. Materials and methods Illumina 450KGSE59685 dataset AD (n = 54) and HC (n = 21) and ribonucleic-acid-sequencing data GSE118553 dataset AD patients (n = 21) and HCs (n = 13) were obtained from the gene expression omnibus database before a comprehensive DNAm-transcriptome profile association analysis, and we performed functional enrichment analysis by Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analyses (KEGG). Three transgenic mice and three wild-type mice were used to validate the hub genes. Results A total of 18,104 DNAm sites in healthy controls (n = 21) and AD patients (n = 54) were surveyed across three brain regions (superior temporal gyrus, entorhinal cortex, and dorsolateral prefrontal cortex). With the addition of the transcriptome analysis, eight hypomethylated-related highly expressed genes and 61 hypermethylated-related lowly expressed genes were identified. Based on 69 shared differentially methylated genes (DMGs), the function enrichment analysis indicated Guanosine triphosphate enzymes (GTPase) regulator activity, a synaptic vesicle cycle, and tight junction functioning. Following this, mice-based models of AD were constructed, and five hub DMGs were verified, which represented a powerful, disease-specific DNAm signature for AD. Conclusion The results revealed that the cross-brain region DNAm was altered in those with AD. The alterations in DNAm affected the target gene expression and participated in the key biological processes of AD. The study provides a valuable epigenetic resource for identifying DNAm-based diagnostic biomarkers, developing effective drugs, and studying AD pathogenesis.
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Affiliation(s)
- Gang Ren
- Department of Neurology, Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, China
| | - Shan Song
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, China
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, China
| | - Sheng-Xiao Zhang
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, China
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, China
| | - Yan Liu
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, China
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, China
| | - Yan Lv
- Department of Nephrology, Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, China
| | - Yan-Hong Wang
- Department of Neurology, Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, China
| | - Rong Zhao
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, China
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, China
| | - Xin-Yi Li
- Department of Neurology, Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, China
- *Correspondence: Xin-Yi Li,
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26
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Genetically predicted telomere length and Alzheimer’s disease endophenotypes: a Mendelian randomization study. Alzheimers Res Ther 2022; 14:167. [PMID: 36345036 PMCID: PMC9641781 DOI: 10.1186/s13195-022-01101-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 10/16/2022] [Indexed: 11/09/2022]
Abstract
Telomere length (TL) is associated with biological aging, consequently influencing the risk of age-related diseases such as Alzheimer’s disease (AD). We aimed to evaluate the potential causal role of TL in AD endophenotypes (i.e., cognitive performance, N = 2233; brain age and AD-related signatures, N = 1134; and cerebrospinal fluid biomarkers (CSF) of AD and neurodegeneration, N = 304) through a Mendelian randomization (MR) analysis. Our analysis was conducted in the context of the ALFA (ALzheimer and FAmilies) study, a population of cognitively healthy individuals at risk of AD. A total of 20 single nucleotide polymorphisms associated with TL were used to determine the effect of TL on AD endophenotypes. Analyses were adjusted by age, sex, and years of education. Stratified analyses by APOE-ɛ4 status and polygenic risk score of AD were conducted. MR analysis revealed significant associations between genetically predicted longer TL and lower levels of CSF Aβ and higher levels of CSF NfL only in APOE-ɛ4 non-carriers. Moreover, inheriting longer TL was associated with greater cortical thickness in age and AD-related brain signatures and lower levels of CSF p-tau among individuals at a high genetic predisposition to AD. Further observational analyses are warranted to better understand these associations.
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27
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Kouli A, Williams-Gray CH. Age-Related Adaptive Immune Changes in Parkinson’s Disease. JOURNAL OF PARKINSON'S DISEASE 2022; 12:S93-S104. [PMID: 35661020 PMCID: PMC9535571 DOI: 10.3233/jpd-223228] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Ageing is a major risk factor for most neurodegenerative diseases, including Parkinson’s disease (PD). Progressive age-related dysregulation of the immune system is termed immunosenescence and is responsible for the weakened response to novel antigens, increased susceptibility to infections and reduced effectiveness of vaccines seen in the elderly. Immune activation, both within the brain and periphery, is heavily implicated in PD but the role of immunosenescence has not been fully explored. Studies to date provide some evidence for an attenuation in immunosenescence in PD, particularly a reduction in senescent CD8 T lymphocytes in PD cases compared to similarly aged controls. Here, we discuss recent evidence of age-related immune abnormalities in PD with a focus on T cell senescence and explore their potential role in disease pathogenesis and development.
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Affiliation(s)
- Antonina Kouli
- Department of Clinical Neurosciences, University of Cambridge, John Van Geest Centre for Brain Repair, Cambridge, UK
| | - Caroline H. Williams-Gray
- Department of Clinical Neurosciences, University of Cambridge, John Van Geest Centre for Brain Repair, Cambridge, UK
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28
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Kim B, Vasanthakumar A, Li QS, Nudelman KN, Risacher SL, Davis JW, Idler K, Lee J, Seo SW, Waring JF, Saykin AJ, Nho K. Integrative analysis of DNA methylation and gene expression identifies genes associated with biological aging in Alzheimer's disease. ALZHEIMER'S & DEMENTIA (AMSTERDAM, NETHERLANDS) 2022; 14:e12354. [PMID: 36187194 PMCID: PMC9489162 DOI: 10.1002/dad2.12354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 08/01/2022] [Accepted: 08/01/2022] [Indexed: 11/17/2022]
Abstract
Introduction The acceleration of biological aging is a risk factor for Alzheimer's disease (AD). Here, we performed weighted gene co-expression network analysis (WGCNA) to identify modules and dysregulated genesinvolved in biological aging in AD. Methods We performed WGCNA to identify modules associated with biological clocks and hub genes of the module with the highest module significance. In addition, we performed differential expression analysis and association analysis with AD biomarkers. Results WGCNA identified five modules associated with biological clocks, with the module designated as "purple" showing the strongest association. Functional enrichment analysis revealed that the purple module was related to cell migration and death. Ten genes were identified as hub genes in purple modules, of which CX3CR1 was downregulated in AD and low levels of CX3CR1 expression were associated with AD biomarkers. Conclusion Network analysis identified genes associated with biological clocks, which suggests the genetic architecture underlying biological aging in AD. Highlights Examine links between Alzheimer's disease (AD) peripheral transcriptome and biological aging changes.Weighted gene co-expression network analysis (WGCNA) found five modules related to biological aging.Among the hub genes of the module, CX3CR1 was downregulated in AD.The CX3CR1 expression level was associated with cognitive performance and brain atrophy.
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Affiliation(s)
- Bo‐Hyun Kim
- Center for NeuroimagingDepartment of Radiology and Imaging SciencesIndiana University School of MedicineIndianapolisIndianaUSA
- Samsung Alzheimer Research CenterSamsung Medical CenterSeoulRepublic of Korea
- Department of Health Sciences and TechnologySHAISTSungkyunkwan UniversitySeoulRepublic of Korea
| | | | - Qingqin S. Li
- Neuroscience Therapeutic AreaJanssen Research & Development, LLCTitusvilleNew JerseyUSA
| | - Kelly N.H. Nudelman
- National Centralized Repository for Alzheimer's Disease and Related DementiasIndiana University School of MedicineIndianapolisIndianaUSA
- Indiana Alzheimer Disease CenterIndiana University School of MedicineIndianapolisIndianaUSA
- Department of Medical and Molecular GeneticsIndiana University School of MedicineIndianapolisIndianaUSA
| | - Shannon L. Risacher
- Center for NeuroimagingDepartment of Radiology and Imaging SciencesIndiana University School of MedicineIndianapolisIndianaUSA
- Indiana Alzheimer Disease CenterIndiana University School of MedicineIndianapolisIndianaUSA
| | | | - Kenneth Idler
- Genomics Research CenterAbbVieNorth ChicagoIllinoisUSA
| | - Jong‐Min Lee
- Department of Biomedical EngineeringHanyang UniversitySeoulRepublic of Korea
| | - Sang Won Seo
- Samsung Alzheimer Research CenterSamsung Medical CenterSeoulRepublic of Korea
- Department of NeurologySamsung Medical CenterSungkyunkwan University School of MedicineSeoulRepublic of Korea
- Department of Health Sciences and TechnologySHAISTSungkyunkwan UniversitySeoulRepublic of Korea
| | | | - Andrew J. Saykin
- Center for NeuroimagingDepartment of Radiology and Imaging SciencesIndiana University School of MedicineIndianapolisIndianaUSA
- Indiana Alzheimer Disease CenterIndiana University School of MedicineIndianapolisIndianaUSA
- Department of Medical and Molecular GeneticsIndiana University School of MedicineIndianapolisIndianaUSA
| | - Kwangsik Nho
- Center for NeuroimagingDepartment of Radiology and Imaging SciencesIndiana University School of MedicineIndianapolisIndianaUSA
- Indiana Alzheimer Disease CenterIndiana University School of MedicineIndianapolisIndianaUSA
- Center for Computational Biology and BioinformaticsIndiana University School of MedicineIndianapolisIndianaUSA
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Rodríguez-Fernández B, Gispert JD, Guigo R, Navarro A, Vilor-Tejedor N, Crous-Bou M. Genetically predicted telomere length and its relationship with neurodegenerative diseases and life expectancy. Comput Struct Biotechnol J 2022; 20:4251-4256. [PMID: 36051868 PMCID: PMC9399257 DOI: 10.1016/j.csbj.2022.08.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 08/03/2022] [Accepted: 08/03/2022] [Indexed: 11/03/2022] Open
Abstract
Telomere length (TL) is a biomarker of biological aging. Shorter telomeres have been associated with mortality and increased rates of age-related diseases. However, observational studies are unable to conclude whether TL is causally associated with those outcomes. Mendelian randomization (MR) was developed for assessing causality using genetic variants in epidemiological research. The objective of this study was to test the potential causal role of TL in neurodegenerative disorders and life expectancy through MR analysis. Summary level data were extracted from the most recent genome-wide association studies for TL, Alzheimer's disease (AD), Parkinson's disease, Frontotemporal dementia, Amyotrophic Lateral Sclerosis, Progressive Supranuclear Palsy and life expectancy. MR estimates revealed that longer telomeres inferred a protective effect on risk of AD (OR = 0.964; adjusted p-value = 0.039). Moreover, longer telomeres were significantly associated with increased life expectancy (βIVW = 0.011; adjusted p-value = 0.039). Sensitivity analyses suggested evidence for directional pleiotropy in AD analyses. Our results showed that genetically predicted longer TL may increase life expectancy and play a protective causal effect on AD. We did not observe significant causal relationships between longer TL and other neurodegenerative diseases. This suggests that the involvement of TL on specific biological mechanisms might differ between AD and life expectancy, with respect to that in other neurodegenerative diseases. Moreover, the presence of pleiotropy may reflect the complex interplay between TL homeostasis and AD pathophysiology. Further observational studies are needed to confirm these results.
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Key Words
- AD, Alzheimer’s disease
- ALS, Amyotrophic lateral sclerosis
- Alzheimer’s disease
- CI, Confidence Interval
- FTD, Frontotemporal dementia
- GWAS, Genome-wide association study
- IV, Instrumental Variable
- IVW, Inverse-Variance Weighted
- LRRC34, Leucine Rich Repeat Containing 34
- Life expectancy
- MR, Mendelian Randomization
- MR-PRESSO, MR-Pleiotropy RESidual Sum and Outlier
- Mendelian randomization
- Neurodegenerative diseases
- OR, Odds ratio
- PD, Parkinson’s disease
- PSP, Progressive Supranuclear Palsy
- SE, Standard Error
- SNP, Single Nucleotide Polymorphism
- TL, Telomere length
- Telomere length
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Affiliation(s)
| | - Juan Domingo Gispert
- Barcelonaβeta Brain Research Center – Pasqual Maragall Foundation, Barcelona, Spain
- IMIM – Hospital del Mar Medical Research Institute, Barcelona, Spain
- Centro de Investigación Biomédica en Red Bioingeniería, Biomateriales y Nanomedicina, Madrid, Spain
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Roderic Guigo
- Centre for Genomic Regulation (CRG), The Barcelona Institute for Science and Technology, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Arcadi Navarro
- Barcelonaβeta Brain Research Center – Pasqual Maragall Foundation, Barcelona, Spain
- Centre for Genomic Regulation (CRG), The Barcelona Institute for Science and Technology, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Catalonia, Spain
- Institute of Evolutionary Biology (CSIC-UPF), Department of Medicine and Life Sciences, Universitat Pompeu Fabra, Spain
| | - Natalia Vilor-Tejedor
- Barcelonaβeta Brain Research Center – Pasqual Maragall Foundation, Barcelona, Spain
- Centre for Genomic Regulation (CRG), The Barcelona Institute for Science and Technology, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Erasmus University Medical Center, Department of Clinical Genetics, Rotterdam, the Netherlands
| | - Marta Crous-Bou
- Barcelonaβeta Brain Research Center – Pasqual Maragall Foundation, Barcelona, Spain
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
- Unit of Nutrition and Cancer, Cancer Epidemiology Research Program, Catalan Institute of Oncology (ICO)-Bellvitge Biomedical Research Center (IDIBELL), Hospitalet del Llobregat, Spain
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Gampawar P, Schmidt R, Schmidt H. Telomere length and brain aging: A systematic review and meta-analysis. Ageing Res Rev 2022; 80:101679. [PMID: 35777725 DOI: 10.1016/j.arr.2022.101679] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 06/22/2022] [Accepted: 06/27/2022] [Indexed: 02/06/2023]
Abstract
The current evidence on the association of leukocyte telomere length (LTL) with age-related structural and cognitive changes in the brain is mixed. Herein conforming to PRISMA 2020 guidelines, we performed a systematic review and meta-analysis using data from 27 observational studies in non-demented individuals. We used effect size and p-value based meta-analysis methods considering marked heterogeneity among studies. We found that the longer LTL was associated with higher brain volume (β = 0.43, 95%CI: 0.36-0.50%, p = 0.008, N = 1102) and with higher global cognition (β = 0.01; 95%CI: 0.00-0.02, p = 0.03, N = 19609) by effect size based meta-analysis and with brain volume, hippocampal volume, global cognition, cognitive domains of attention/speed as well as executive functions by p-value based meta-analysis. No significant association of LTL with brain white matter hyperintensities was detected. Furthermore, the evidence strongly suggests a subgroup-specific canonical effect of telomeres, notably in older individuals and females. In conclusion, we provide meta-analytic evidence on the beneficial effect of telomeres on brain structure as well as cognition and advocate for a beneficial subgroup-specific effect that warrants further attention.
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Affiliation(s)
- Piyush Gampawar
- Research Unit-Genetic Epidemiology, Gottfried Schatz Research Centre for Cell Signaling, Metabolism and Aging, Molecular Biology and Biochemistry, Medical University Graz, Graz, Austria
| | - Reinhold Schmidt
- Department of Neurology, Clinical Division of Neurogeriatrics, Medical University Graz, Graz, Austria
| | - Helena Schmidt
- Research Unit-Genetic Epidemiology, Gottfried Schatz Research Centre for Cell Signaling, Metabolism and Aging, Molecular Biology and Biochemistry, Medical University Graz, Graz, Austria.
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Li Y, Lu J, Hou Y, Huang S, Pei G. Alzheimer’s Amyloid-β Accelerates Human Neuronal Cell Senescence Which Could Be Rescued by Sirtuin-1 and Aspirin. Front Cell Neurosci 2022; 16:906270. [PMID: 35783098 PMCID: PMC9249263 DOI: 10.3389/fncel.2022.906270] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 05/24/2022] [Indexed: 12/12/2022] Open
Abstract
Cellular senescence is a major biological process related to aging. Neuronal cell senescence contributes to the pathogenesis of many aging-related neurodegenerative diseases including Alzheimer’s disease (AD). In this study, we showed that amyloid-β42 oligomers (Aβ), one of the core pathological players of AD, significantly upregulated the expression of senescence markers, p21, plasminogen activator inhibitor-1 (PAI-1), and SA-β-gal (senescence-associated β-galactosidase) in multiple human neuronal cells, including SK-N-SH cells, SH-SY5Y cells, and neural stem cell (NSC)-derived neuronal cells. Moreover, it was consistently observed among the cells that Aβ promoted senescence-associated DNA damage as the levels of 8-OHdG staining, histone variant H2AX phosphorylation (γ-H2AX), and genomic DNA lesion increased. Mechanism study revealed that the exposure of Aβ markedly suppressed the expression of sirtuin-1 (SIRT1), a critical regulator of aging, and the exogenous expression of SIRT1 alleviated Aβ-induced cell senescence phenotypes. To our surprise, a widely used cardiovascular drug aspirin considerably rescued Aβ-induced cellular senescence at least partially through its regulation of SIRT1. In conclusion, our findings clearly demonstrate that exposure of Aβ alone is sufficient to accelerate the senescence of human neuronal cells through the downregulation of SIRT1.
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Affiliation(s)
- Yi Li
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Juan Lu
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Yujun Hou
- Institute for Regenerative Medicine, Shanghai East Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Shichao Huang
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
- *Correspondence: Shichao Huang,
| | - Gang Pei
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
- Shanghai Key Laboratory of Signaling and Disease Research, Collaborative Innovation Center for Brain Science, School of Life Sciences and Technology, Tongji University, Shanghai, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- Gang Pei,
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Pham C, Vryer R, O’Hely M, Mansell T, Burgner D, Collier F, Symeonides C, Tang MLK, Vuillermin P, Gray L, Saffery R, Ponsonby AL. Shortened Infant Telomere Length Is Associated with Attention Deficit/Hyperactivity Disorder Symptoms in Children at Age Two Years: A Birth Cohort Study. Int J Mol Sci 2022; 23:ijms23094601. [PMID: 35562991 PMCID: PMC9104809 DOI: 10.3390/ijms23094601] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/11/2022] [Accepted: 04/14/2022] [Indexed: 12/13/2022] Open
Abstract
Environmental factors can accelerate telomere length (TL) attrition. Shortened TL is linked to attention deficit/hyperactivity disorder (ADHD) symptoms in school-aged children. The onset of ADHD occurs as early as preschool-age, but the TL-ADHD association in younger children is unknown. We investigated associations between infant TL and ADHD symptoms in children and assessed environmental factors as potential confounders and/or mediators of this association. Relative TL was measured by quantitative polymerase chain reaction in cord and 12-month blood in the birth cohort study, the Barwon Infant Study. Early life environmental factors collected antenatally to two years were used to measure confounding. ADHD symptoms at age two years were evaluated by the Child Behavior Checklist Attention Problems (AP) and the Attention Deficit/Hyperactivity Problems (ADHP). Associations between early life environmental factors on TL or ADHD symptoms were assessed using multivariable regression models adjusted for relevant factors. Telomere length at 12 months (TL12), but not at birth, was inversely associated with AP (β = −0.56; 95% CI (−1.13, 0.006); p = 0.05) and ADHP (β = −0.66; 95% CI (−1.11, −0.21); p = 0.004). Infant secondhand smoke exposure at one month was independently associated with shorter TL12 and also higher ADHD symptoms. Further work is needed to elucidate the mechanisms that influence TL attrition and early neurodevelopment.
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Affiliation(s)
- Cindy Pham
- Murdoch Children’s Research Institute, Royal Children’s Hospital, Parkville, VIC 3052, Australia; (C.P.); (R.V.); (M.O.); (T.M.); (D.B.); (C.S.); (M.L.K.T.); (P.V.); (R.S.)
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC 3052, Australia
- Melbourne School of Population and Global Health, University of Melbourne, Parkville, VIC 3052, Australia
- Child Health Research Unit, Barwon Health, Geelong, VIC 3220, Australia; (F.C.); (L.G.)
| | - Regan Vryer
- Murdoch Children’s Research Institute, Royal Children’s Hospital, Parkville, VIC 3052, Australia; (C.P.); (R.V.); (M.O.); (T.M.); (D.B.); (C.S.); (M.L.K.T.); (P.V.); (R.S.)
- Child Health Research Unit, Barwon Health, Geelong, VIC 3220, Australia; (F.C.); (L.G.)
- Department of Paediatrics, University of Melbourne, Parkville, VIC 3052, Australia
| | - Martin O’Hely
- Murdoch Children’s Research Institute, Royal Children’s Hospital, Parkville, VIC 3052, Australia; (C.P.); (R.V.); (M.O.); (T.M.); (D.B.); (C.S.); (M.L.K.T.); (P.V.); (R.S.)
- Child Health Research Unit, Barwon Health, Geelong, VIC 3220, Australia; (F.C.); (L.G.)
- School of Medicine, Deakin University, Geelong, VIC 3220, Australia
| | - Toby Mansell
- Murdoch Children’s Research Institute, Royal Children’s Hospital, Parkville, VIC 3052, Australia; (C.P.); (R.V.); (M.O.); (T.M.); (D.B.); (C.S.); (M.L.K.T.); (P.V.); (R.S.)
- Child Health Research Unit, Barwon Health, Geelong, VIC 3220, Australia; (F.C.); (L.G.)
- Department of Paediatrics, University of Melbourne, Parkville, VIC 3052, Australia
| | - David Burgner
- Murdoch Children’s Research Institute, Royal Children’s Hospital, Parkville, VIC 3052, Australia; (C.P.); (R.V.); (M.O.); (T.M.); (D.B.); (C.S.); (M.L.K.T.); (P.V.); (R.S.)
- Child Health Research Unit, Barwon Health, Geelong, VIC 3220, Australia; (F.C.); (L.G.)
- Department of Paediatrics, University of Melbourne, Parkville, VIC 3052, Australia
| | - Fiona Collier
- Child Health Research Unit, Barwon Health, Geelong, VIC 3220, Australia; (F.C.); (L.G.)
- School of Medicine, Deakin University, Geelong, VIC 3220, Australia
| | - Christos Symeonides
- Murdoch Children’s Research Institute, Royal Children’s Hospital, Parkville, VIC 3052, Australia; (C.P.); (R.V.); (M.O.); (T.M.); (D.B.); (C.S.); (M.L.K.T.); (P.V.); (R.S.)
- Department of Paediatrics, University of Melbourne, Parkville, VIC 3052, Australia
| | - Mimi L. K. Tang
- Murdoch Children’s Research Institute, Royal Children’s Hospital, Parkville, VIC 3052, Australia; (C.P.); (R.V.); (M.O.); (T.M.); (D.B.); (C.S.); (M.L.K.T.); (P.V.); (R.S.)
- Department of Paediatrics, University of Melbourne, Parkville, VIC 3052, Australia
| | - Peter Vuillermin
- Murdoch Children’s Research Institute, Royal Children’s Hospital, Parkville, VIC 3052, Australia; (C.P.); (R.V.); (M.O.); (T.M.); (D.B.); (C.S.); (M.L.K.T.); (P.V.); (R.S.)
- Child Health Research Unit, Barwon Health, Geelong, VIC 3220, Australia; (F.C.); (L.G.)
- School of Medicine, Deakin University, Geelong, VIC 3220, Australia
| | - Lawrence Gray
- Child Health Research Unit, Barwon Health, Geelong, VIC 3220, Australia; (F.C.); (L.G.)
- School of Medicine, Deakin University, Geelong, VIC 3220, Australia
| | - Richard Saffery
- Murdoch Children’s Research Institute, Royal Children’s Hospital, Parkville, VIC 3052, Australia; (C.P.); (R.V.); (M.O.); (T.M.); (D.B.); (C.S.); (M.L.K.T.); (P.V.); (R.S.)
- Child Health Research Unit, Barwon Health, Geelong, VIC 3220, Australia; (F.C.); (L.G.)
- Department of Paediatrics, University of Melbourne, Parkville, VIC 3052, Australia
| | - Anne-Louise Ponsonby
- Murdoch Children’s Research Institute, Royal Children’s Hospital, Parkville, VIC 3052, Australia; (C.P.); (R.V.); (M.O.); (T.M.); (D.B.); (C.S.); (M.L.K.T.); (P.V.); (R.S.)
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC 3052, Australia
- Melbourne School of Population and Global Health, University of Melbourne, Parkville, VIC 3052, Australia
- Child Health Research Unit, Barwon Health, Geelong, VIC 3220, Australia; (F.C.); (L.G.)
- Correspondence:
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33
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Cellular senescence in the Aging Brain: A promising target for neurodegenerative diseases. Mech Ageing Dev 2022; 204:111675. [DOI: 10.1016/j.mad.2022.111675] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 03/24/2022] [Accepted: 04/07/2022] [Indexed: 01/10/2023]
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34
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Xie H, Ma Y, Shao M, Kong J, Zhou T, Wang F, Cai G, Xu S, Pan F. Telomere length in patients with osteoarthritis: a systematic review and meta-analysis. Aging Clin Exp Res 2022; 34:495-503. [PMID: 34313963 DOI: 10.1007/s40520-021-01944-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 07/21/2021] [Indexed: 12/31/2022]
Abstract
BACKGROUND Telomere length (TL) as a biomarker of aging was associated with many age-related diseases. The relationship between TL and osteoarthritis (OA), the most common form of joint diseases, had been investigated in a number of studies, but with the result inconsistent. AIMS The purpose of this study was to systematically evaluate the relationship between TL and OA. METHODS Until January 1, 2021, PubMed, Web of Science and Cochrane Library were comprehensively retrieved for relevant literatures. Quality of included literature was assessed using the Newcastle-Ottawa Scale (NOS) assessment scale. The pooled standard mean difference (SMD) with 95% confidence interval (CI) of Leukocytes TL was calculated using random-effect model. Subgroup analysis and meta-regression were used to investigate the potential source of heterogeneity. RESULTS Six original studies containing 678 OA patients and 1457 healthy controls were included in this meta-analysis. All six included studies were case-control designed. Pooled results showed that patients with OA had a shorter TL in peripheral blood leukocytes (PBLs) compared with healthy controls, (SMD = - 0.32, 95% CI - 0.57 to - 0.06, Z = - 2.45, P = 0.014). Subgroup and meta-regression analysis showed that sex ratio and body mass index (BMI) were possible sources of heterogeneity. Publication bias was not observed. CONCLUSION The TL of PBLs in patients with OA was shorter than that of healthy controls, suggesting that PBLs TL may be closely associated with the pathogenesis and progression of OA.
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Affiliation(s)
- Huimin Xie
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, Anhui, People's Republic of China
| | - Yubo Ma
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, Anhui, People's Republic of China
| | - Ming Shao
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, Anhui, People's Republic of China
| | - Jiangping Kong
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, Anhui, People's Republic of China
| | - Tingting Zhou
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, Anhui, People's Republic of China
| | - Feier Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, Anhui, People's Republic of China
| | - Guoqi Cai
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, Anhui, People's Republic of China
| | - Shenqian Xu
- Department of Rheumatism and Immunity, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui, China
| | - Faming Pan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China.
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, Anhui, People's Republic of China.
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Liu RM. Aging, Cellular Senescence, and Alzheimer's Disease. Int J Mol Sci 2022; 23:1989. [PMID: 35216123 PMCID: PMC8874507 DOI: 10.3390/ijms23041989] [Citation(s) in RCA: 95] [Impact Index Per Article: 47.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 02/07/2022] [Accepted: 02/08/2022] [Indexed: 01/10/2023] Open
Abstract
Aging is the greatest risk factor for late-onset Alzheimer's disease (LOAD), which accounts for >95% of Alzheimer's disease (AD) cases. The mechanism underlying the aging-related susceptibility to LOAD is unknown. Cellular senescence, a state of permanent cell growth arrest, is believed to contribute importantly to aging and aging-related diseases, including AD. Senescent astrocytes, microglia, endothelial cells, and neurons have been detected in the brain of AD patients and AD animal models. Removing senescent cells genetically or pharmacologically ameliorates β-amyloid (Aβ) peptide and tau-protein-induced neuropathologies, and improves memory in AD model mice, suggesting a pivotal role of cellular senescence in AD pathophysiology. Nonetheless, although accumulated evidence supports the role of cellular senescence in aging and AD, the mechanisms that promote cell senescence and how senescent cells contribute to AD neuropathophysiology remain largely unknown. This review summarizes recent advances in this field. We believe that the removal of senescent cells represents a promising approach toward the effective treatment of aging-related diseases, such as AD.
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Affiliation(s)
- Rui-Ming Liu
- Division of Pulmonary, Allergy, and Critical Care, Department of Medicine, School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294-0006, USA
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36
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Codd V, Denniff M, Swinfield C, Warner SC, Papakonstantinou M, Sheth S, Nanus DE, Budgeon CA, Musicha C, Bountziouka V, Wang Q, Bramley R, Allara E, Kaptoge S, Stoma S, Jiang T, Butterworth AS, Wood AM, Di Angelantonio E, Thompson JR, Danesh JN, Nelson CP, Samani NJ. Measurement and initial characterization of leukocyte telomere length in 474,074 participants in UK Biobank. NATURE AGING 2022; 2:170-179. [PMID: 37117760 DOI: 10.1038/s43587-021-00166-9] [Citation(s) in RCA: 79] [Impact Index Per Article: 39.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 12/21/2021] [Indexed: 04/30/2023]
Abstract
Leukocyte telomere length (LTL) is a proposed marker of biological age. Here we report the measurement and initial characterization of LTL in 474,074 participants in UK Biobank. We confirm that older age and male sex associate with shorter LTL, with women on average ~7 years younger in 'biological age' than men. Compared to white Europeans, LTL is markedly longer in African and Chinese ancestries. Older paternal age at birth is associated with longer individual LTL. Higher white cell count is associated with shorter LTL, but proportions of white cell subtypes show weaker associations. Age, ethnicity, sex and white cell count explain ~5.5% of LTL variance. Using paired samples from 1,351 participants taken ~5 years apart, we estimate the within-individual variability in LTL and provide a correction factor for this. This resource provides opportunities to investigate determinants and biomedical consequences of variation in LTL.
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Affiliation(s)
- V Codd
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK.
- NIHR Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK.
| | - M Denniff
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
| | - C Swinfield
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
| | - S C Warner
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
| | - M Papakonstantinou
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
| | - S Sheth
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
| | - D E Nanus
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
| | - C A Budgeon
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
- NIHR Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK
- School of Population and Global Health, University of Western Australia, Crawley, Western Australia, Australia
| | - C Musicha
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
- NIHR Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - V Bountziouka
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
- NIHR Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - Q Wang
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
- NIHR Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - R Bramley
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
- NIHR Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - E Allara
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
- National Institute for Health Research Blood and Transplant Research Unit in Donor Health and Genomics, University of Cambridge, Cambridge, UK
| | - S Kaptoge
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
- National Institute for Health Research Blood and Transplant Research Unit in Donor Health and Genomics, University of Cambridge, Cambridge, UK
- British Heart Foundation Centre of Research Excellence, University of Cambridge, Cambridge, UK
| | - S Stoma
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
| | - T Jiang
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - A S Butterworth
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
- National Institute for Health Research Blood and Transplant Research Unit in Donor Health and Genomics, University of Cambridge, Cambridge, UK
- British Heart Foundation Centre of Research Excellence, University of Cambridge, Cambridge, UK
- Health Data Research UK Cambridge, Wellcome Genome Campus and University of Cambridge, Cambridge, UK
| | - A M Wood
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
- National Institute for Health Research Blood and Transplant Research Unit in Donor Health and Genomics, University of Cambridge, Cambridge, UK
- British Heart Foundation Centre of Research Excellence, University of Cambridge, Cambridge, UK
- Health Data Research UK Cambridge, Wellcome Genome Campus and University of Cambridge, Cambridge, UK
- Medical Research Council Biostatistics Unit, Cambridge Institute of Public Health, University of Cambridge, Cambridge, UK
- The Alan Turing Institute, London, UK
| | - E Di Angelantonio
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
- National Institute for Health Research Blood and Transplant Research Unit in Donor Health and Genomics, University of Cambridge, Cambridge, UK
- British Heart Foundation Centre of Research Excellence, University of Cambridge, Cambridge, UK
- Health Data Research UK Cambridge, Wellcome Genome Campus and University of Cambridge, Cambridge, UK
- Health Data Science Centre, Human Technopole, Milan, Italy
| | - J R Thompson
- Department of Health Sciences, University of Leicester, Leicester, UK
| | - J N Danesh
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
- National Institute for Health Research Blood and Transplant Research Unit in Donor Health and Genomics, University of Cambridge, Cambridge, UK
- British Heart Foundation Centre of Research Excellence, University of Cambridge, Cambridge, UK
- Health Data Research UK Cambridge, Wellcome Genome Campus and University of Cambridge, Cambridge, UK
- Department of Human Genetics, Wellcome Sanger Institute, Hinxton, UK
| | - C P Nelson
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
- NIHR Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - N J Samani
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK.
- NIHR Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK.
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Nickels M, Mastana S, Denniff M, Codd V, Akam E. Pilates and telomere dynamics: A 12-month longitudinal study. J Bodyw Mov Ther 2022; 30:118-124. [DOI: 10.1016/j.jbmt.2022.02.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 11/10/2021] [Accepted: 02/04/2022] [Indexed: 10/19/2022]
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Elsallabi O, Patruno A, Pesce M, Cataldi A, Carradori S, Gallorini M. Fisetin as a Senotherapeutic Agent: Biopharmaceutical Properties and Crosstalk between Cell Senescence and Neuroprotection. Molecules 2022; 27:738. [PMID: 35164003 PMCID: PMC8839434 DOI: 10.3390/molecules27030738] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 01/20/2022] [Accepted: 01/21/2022] [Indexed: 12/12/2022] Open
Abstract
Like other organs, brain functions diminish with age. Furthermore, for a variety of neurological disorders-including Alzheimer's disease-age is one of the higher-risk factors. Since in many Western countries the average age is increasing, determining approaches for decreasing the effects of aging on brain function is taking on a new urgency. Neuroinflammation and oxidative stress are two convoluted key factors in brain aging and chronic neurodegenerative diseases. The diverseness of factors, causing an age-related decrease in brain functions, requires identifying small molecules that have multiple biological activities that can affect all these factors. One great source of these small molecules is related to polyphenolic flavonoids. Recently, 3,3',4',7-tetrahydroxyflavone (fisetin) has been reported as a potent senotherapeutic capable of extending lifespan by reducing peroxidation levels and enhancing antioxidant cell responses. The neuroprotective effects of fisetin have been shown in several in vitro and in vivo models of neurological disorders due to its actions on multiple pathways associated with different neurological disorders. The present work aims to collect the most recent achievements related to the antioxidant and neuroprotective effects of fisetin. Moreover, in silico pharmacokinetics, pharmacodynamics, and toxicity of fisetin are also comprehensively described along with emerging novel drug delivery strategies for the amelioration of this flavonol bioavailability and chemical stability.
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Affiliation(s)
- Osama Elsallabi
- Department of Medicine and Science of Aging, University “G. d’Annunzio” of Chieti Pescara, 66100 Chieti, Italy; (O.E.); (A.P.); (M.P.)
- Department of Biosciences and Nutrition, Karolinska Institutet, SE-141 57 Huddinge, Sweden
| | - Antonia Patruno
- Department of Medicine and Science of Aging, University “G. d’Annunzio” of Chieti Pescara, 66100 Chieti, Italy; (O.E.); (A.P.); (M.P.)
| | - Mirko Pesce
- Department of Medicine and Science of Aging, University “G. d’Annunzio” of Chieti Pescara, 66100 Chieti, Italy; (O.E.); (A.P.); (M.P.)
| | - Amelia Cataldi
- Department of Pharmacy, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (A.C.); (M.G.)
| | - Simone Carradori
- Department of Pharmacy, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (A.C.); (M.G.)
| | - Marialucia Gallorini
- Department of Pharmacy, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (A.C.); (M.G.)
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Zaman Q, Zhang D, Reddy OS, Wong WT, Lai WF. Roles and Mechanisms of Astragaloside IV in Combating Neuronal Aging. Aging Dis 2022; 13:1845-1861. [DOI: 10.14336/ad.2022.0126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Accepted: 01/26/2022] [Indexed: 11/18/2022] Open
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Guzonjić A, Sopić M, Ostanek B, Kotur-Stevuljević J. Telomere length as a biomarker of aging and diseases. ARHIV ZA FARMACIJU 2022. [DOI: 10.5937/arhfarm72-36376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
As research related to healthspan and lifespan has become a hot topic, the necessity for a reliable and practical biomarker of aging (BoA), which can provide information about mortality and morbidity risk, along with remaining life expectancy, has increased. The chromosome terminus non-coding protective structure that prevents genomic instability is called a telomere. The continual shortening of telomeres, which affects their structure as well as function, is a hallmark of agedness. The aforementioned process is a potential cause of age-related diseases (ARDs), leading to a bad prognosis and a low survival rate, which compromise health and longevity. Hence, studies scrutinizing the BoAs often include telomere length (TL) as a prospective candidate. The results of these studies suggest that TL measurement can only provide an approximate appraisal of the aging rate, and its implementation into clinical practice and routine use as a BoA has many limitations and challenges. Nevertheless, measuring TL while determining other biomarkers can be used to assess biological age. This review focuses on the importance of telomeres in health, senescence, and diseases, as well as on summarizing the results and conclusions of previous studies evaluating TL as a potential BoA.
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Fu J, Ji X, Liu J, Chen X, Shang H. Meta-analysis of the Connection Between Alzheimer Disease and Telomeres. Alzheimer Dis Assoc Disord 2022; 36:73-79. [PMID: 34654043 DOI: 10.1097/wad.0000000000000468] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 06/16/2021] [Indexed: 02/05/2023]
Abstract
BACKGROUND Alzheimer disease (AD) is the most common neurodegenerative disease of the central nervous system. The stability of the telomere-telomerase system is closely related to AD. A previous meta-analysis indicated that AD patients had shorter telomere length (TL) than control subjects. However, there are no consistent telomerase activity findings in AD patients, and the published telomerase studies were not meta-analyzed yet. METHODS We searched all the related studies that probed into TL and/or telomerase activity in AD patients based on PubMed and Embase database from the establishment to September 2020. The Chinese National Knowledge Infrastructure, Wanfang and China Science and Technology Journal Database were also utilized. The quality of the included studies was evaluated by using Newcastle-Ottawa Scale. All the statistical analyses of this meta-analysis were performed using Stata version 15.0. RESULTS Analyzing 30 TL data from 2248 AD patients and 4865 controls, AD patients had a significantly shorter TL than the controls, with a standardized mean difference of -0.70 (confidence interval: -0.95 to -0.46; P<0.05). The meta-analysis included 3 primary studies and did not find a significant difference in the telomerase activity between 233 AD patients and 132 controls, but AD patients had a trend of increased telomerase activity compared with controls (standardized mean difference: 0.47; confidence interval: -0.29 to 1.23; P>0.05). CONCLUSION Our results showed that compared with the control group, the AD group had a shorter TL and may have higher telomerase activity.
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Affiliation(s)
- Jiajia Fu
- Department of Neurology, West China Hospital, Sichuan University, Chengdu Sichuan
| | - Xiaoyu Ji
- Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Jiao Liu
- Department of Neurology, West China Hospital, Sichuan University, Chengdu Sichuan
| | - Xueping Chen
- Department of Neurology, West China Hospital, Sichuan University, Chengdu Sichuan
| | - Huifang Shang
- Department of Neurology, West China Hospital, Sichuan University, Chengdu Sichuan
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Wu L, Xie X, Liang T, Ma J, Yang L, Yang J, Li L, Xi Y, Li H, Zhang J, Chen X, Ding Y, Wu Q. Integrated Multi-Omics for Novel Aging Biomarkers and Antiaging Targets. Biomolecules 2021; 12:39. [PMID: 35053186 PMCID: PMC8773837 DOI: 10.3390/biom12010039] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 12/17/2021] [Accepted: 12/19/2021] [Indexed: 12/12/2022] Open
Abstract
Aging is closely related to the occurrence of human diseases; however, its exact biological mechanism is unclear. Advancements in high-throughput technology provide new opportunities for omics research to understand the pathological process of various complex human diseases. However, single-omics technologies only provide limited insights into the biological mechanisms of diseases. DNA, RNA, protein, metabolites, and microorganisms usually play complementary roles and perform certain biological functions together. In this review, we summarize multi-omics methods based on the most relevant biomarkers in single-omics to better understand molecular functions and disease causes. The integration of multi-omics technologies can systematically reveal the interactions among aging molecules from a multidimensional perspective. Our review provides new insights regarding the discovery of aging biomarkers, mechanism of aging, and identification of novel antiaging targets. Overall, data from genomics, transcriptomics, proteomics, metabolomics, integromics, microbiomics, and systems biology contribute to the identification of new candidate biomarkers for aging and novel targets for antiaging interventions.
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Affiliation(s)
- Lei Wu
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (L.W.); (X.X.); (T.L.); (L.Y.); (J.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (J.M.); (X.C.)
| | - Xinqiang Xie
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (L.W.); (X.X.); (T.L.); (L.Y.); (J.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Tingting Liang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (L.W.); (X.X.); (T.L.); (L.Y.); (J.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (J.M.); (X.C.)
| | - Jun Ma
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (J.M.); (X.C.)
| | - Lingshuang Yang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (L.W.); (X.X.); (T.L.); (L.Y.); (J.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Juan Yang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (L.W.); (X.X.); (T.L.); (L.Y.); (J.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (J.M.); (X.C.)
| | - Longyan Li
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (L.W.); (X.X.); (T.L.); (L.Y.); (J.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Yu Xi
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (L.W.); (X.X.); (T.L.); (L.Y.); (J.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Haixin Li
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (L.W.); (X.X.); (T.L.); (L.Y.); (J.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Jumei Zhang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (L.W.); (X.X.); (T.L.); (L.Y.); (J.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Xuefeng Chen
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (J.M.); (X.C.)
| | - Yu Ding
- Department of Food Science and Technology, Institute of Food Safety and Nutrition, Jinan University, Guangzhou 510632, China
| | - Qingping Wu
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (L.W.); (X.X.); (T.L.); (L.Y.); (J.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
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Fu Y, Bu G, Kanekiyo T, Zhao J. Counteracting Alzheimer's disease via somatic TERT activation. NATURE AGING 2021; 1:1081-1082. [PMID: 37117526 DOI: 10.1038/s43587-021-00145-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Affiliation(s)
- Yuan Fu
- Department of Neurology, The Fourth Hospital of Harbin Medical University, Harbin, China
| | - Guojun Bu
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL, USA
- Neuroregeneration Laboratory, Center for Regenerative Medicine, Mayo Clinic, Jacksonville, FL, USA
| | - Takahisa Kanekiyo
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL, USA
- Neuroregeneration Laboratory, Center for Regenerative Medicine, Mayo Clinic, Jacksonville, FL, USA
| | - Jing Zhao
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL, USA.
- Neuroregeneration Laboratory, Center for Regenerative Medicine, Mayo Clinic, Jacksonville, FL, USA.
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Lee KH, Kim DY, Kim W. Regulation of Gene Expression by Telomere Position Effect. Int J Mol Sci 2021; 22:ijms222312807. [PMID: 34884608 PMCID: PMC8657463 DOI: 10.3390/ijms222312807] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/23/2021] [Accepted: 11/24/2021] [Indexed: 11/16/2022] Open
Abstract
Many diseases that involve malignant tumors in the elderly affect the quality of human life; therefore, the relationship between aging and pathogenesis in geriatric diseases must be under-stood to develop appropriate treatments for these diseases. Recent reports have shown that epigenetic regulation caused by changes in the local chromatin structure plays an essential role in aging. This review provides an overview of the roles of telomere shortening on genomic structural changes during an age-dependent shift in gene expression. Telomere shortening is one of the most prominent events that is involved in cellular aging and it affects global gene expression through genome rearrangement. This review provides novel insights into the roles of telomere shortening in disease-affected cells during pathogenesis and suggests novel therapeutic approaches.
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Affiliation(s)
- Kyung-Ha Lee
- Division of Cosmetic Science and Technology, Daegu Haany University, Gyeongsan 38610, Korea;
| | - Do-Yeon Kim
- Department of Pharmacology, School of Dentistry, Kyungpook National University, Daegu 41940, Korea
- Correspondence: (D.-Y.K.); (W.K.)
| | - Wanil Kim
- Department of Biochemistry, Department of Convergence Medical Science, Institute of Health Sciences, School of Medicine, Gyeongsang National University, Jinju 52727, Korea
- Correspondence: (D.-Y.K.); (W.K.)
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Mizuno Y, Konishi S, Imai H, Fujimori E, Kojima N, Kajiwara C, Yoshinaga J. Telomere length and urinary 8-hydroxy-2'-deoxyguanosine and essential trace element concentrations in female Japanese university students. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:1328-1334. [PMID: 34672915 DOI: 10.1080/10934529.2021.1991741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 10/04/2021] [Accepted: 10/04/2021] [Indexed: 06/13/2023]
Abstract
Telomere length is thought to be a biomarker of biological aging. This study examined whether telomere length was associated with urinary concentrations of 8-hydroxy-2'-deoxyguanosine (8-OHdG), a biomarker of oxidative stress, and antioxidative trace elements in 73 female Japanese university students (age: 19.2 ± 0.7 years). We quantified 8-OHdG and selenium in urine by liquid chromatography-mass spectrometry and inductively coupled plasma-mass spectrometry, respectively. Telomere length and urinary concentrations of other essential trace elements (molybdenum, cobalt, and chromium) that were previously measured in the same study participants, were used in this study. We used multiple linear regression analysis to examine the associations of telomere length with urinary 8-OHdG and essential trace element concentrations (covariates: urinary cotinine concentration, age, BMI, and drinking status). The geometric means (geometric standard deviation) of 8-OHdG and selenium were 3.4 (1.5) and 31 (1.3) µg/g creatinine, respectively. Telomere length was not associated with urinary 8-OHdG concentration, but was negatively associated with urinary selenium concentration. In conclusion, telomere length was not associated with urinary 8-OHdG concentration in the young women in this study. Longitudinal studies should be conducted to clarify the association between telomere shortening rate and oxidative stress level.
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Affiliation(s)
- Yuki Mizuno
- Department of Human Ecology, School of International Health, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Shoko Konishi
- Department of Human Ecology, School of International Health, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Hideki Imai
- Faculty of Nursing, Ishikawa Prefectural Nursing University, Ishikawa, Japan
- Tokyo Healthcare University, Tokyo, Japan
| | - Eiji Fujimori
- National Environmental Research and Training Institute, Saitama, Japan
| | | | | | - Jun Yoshinaga
- Faculty of Life Sciences, Toyo University, Gunma, Japan
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Lohman T, Bains G, Berk L, Lohman E. Predictors of Biological Age: The Implications for Wellness and Aging Research. Gerontol Geriatr Med 2021; 7:23337214211046419. [PMID: 34595331 PMCID: PMC8477681 DOI: 10.1177/23337214211046419] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 07/14/2021] [Accepted: 08/18/2021] [Indexed: 12/26/2022] Open
Abstract
As healthspan and lifespan research breakthroughs have become more commonplace, the need for valid, practical markers of biological age is becoming increasingly paramount. The accessibility and affordability of biological age predictors that can reveal information about mortality and morbidity risk, as well as remaining years of life, has profound clinical and research implications. In this review, we examine 5 groups of aging biomarkers capable of providing accurate biological age estimations. The unique capabilities of these biomarkers have far reaching implications for the testing of both pharmaceutical and non-pharmaceutical interventions designed to slow or reverse biological aging. Additionally, the enhanced validity and availability of these tools may have increasingly relevant clinical value. The authors of this review explore those implications, with an emphasis on lifestyle modification research, and provide an overview of the current evidence regarding 5 biological age predictor categories: Telomere length, composite biomarkers, DNA methylation “epigenetic clocks,” transcriptional predictors of biological age, and functional age predictors.
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Affiliation(s)
- Trevor Lohman
- School of Allied Health Professions, Loma Linda University, Loma Linda, CA, USA
| | - Gurinder Bains
- School of Allied Health Professions, Loma Linda University, Loma Linda, CA, USA
| | - Lee Berk
- School of Allied Health Professions, Loma Linda University, Loma Linda, CA, USA
| | - Everett Lohman
- School of Allied Health Professions, Loma Linda University, Loma Linda, CA, USA
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47
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Yang T, Wang H, Xiong Y, Chen C, Duan K, Jia J, Ma F. Vitamin D Supplementation Improves Cognitive Function Through Reducing Oxidative Stress Regulated by Telomere Length in Older Adults with Mild Cognitive Impairment: A 12-Month Randomized Controlled Trial. J Alzheimers Dis 2021; 78:1509-1518. [PMID: 33164936 DOI: 10.3233/jad-200926] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Cognitive decline in older adults is a serious public health problem today. Association between vitamin D supplementation and cognition remains controversial. OBJECTIVE To determine whether a 12-month vitamin D supplementation improves cognitive function in elderly subjects with mild cognitive impairment (MCI), and whether it is mediated through the mechanism in which telomere length (TL) regulate oxidative stress. METHODS This was a double-blind, randomized, placebo-controlled trial in Tianjin, China. Participants were all native Chinese speakers aged 65 years and older with MCI. 183 subjects were randomized to an intervention group (vitamin D 800 IU/day, n = 93) or a placebo group (the matching starch granules, n = 90), and followed up for 12 months. Tests of cognitive function and mechanism-related biomarkers were evaluated at baseline, 6 months, and 12 months. RESULTS Repeated-measures ANOVA showed substantial improvements in the full scale intelligence quotient (FSIQ), information, digit span, vocabulary, block design, and picture arrangement scores in the vitamin D group over the placebo group (p < 0.001). Leukocyte TL was significantly higher, while serum 8-OXO-dG, OGG1mRNA, and P16INK4amRNA revealed greater decreases in the vitamin D group over the placebo group (p < 0.001). According to mixed-model repeated-measures ANOVA analysis, vitamin D group showed a significant enhancement in the FSIQ score for 12 months compared with the control (estimate value = 5.132, p < 0.001). CONCLUSION Vitamin D supplementation for 12 months appears to improve cognitive function through reducing oxidative stress regulated by increased TL in order adults with MCI. Vitamin D may be a promising public health strategy to prevent cognitive decline.
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Affiliation(s)
- Tong Yang
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China.,Tianjin Key Laboratory of Environment, Nutrition and Public Health, Center for International Collaborative Research on environment, Nutrition and Public Health, Tianjin, China
| | - Hualou Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China.,Tianjin Key Laboratory of Environment, Nutrition and Public Health, Center for International Collaborative Research on environment, Nutrition and Public Health, Tianjin, China
| | - Ying Xiong
- Department of Community Service, Wangdingdi Hospital of Tianjin Nankai District, Tianjin, China
| | - Chong Chen
- Department of Clinical Laboratory, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin, China.,Key Laboratory of Cancer Prevention and Therapy, Tianjin, China.,Tianjin's Clinical Research Center for Cancer, Tianjin, China.,National Human Genetic Resources Sharing Service Platform, Tianjin, China
| | - Keran Duan
- Biobank, Tianjin First Center Hospital, Tianjin, China
| | - Jingya Jia
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China.,Tianjin Key Laboratory of Environment, Nutrition and Public Health, Center for International Collaborative Research on environment, Nutrition and Public Health, Tianjin, China
| | - Fei Ma
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China.,Tianjin Key Laboratory of Environment, Nutrition and Public Health, Center for International Collaborative Research on environment, Nutrition and Public Health, Tianjin, China
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Gruber HJ, Semeraro MD, Renner W, Herrmann M. Telomeres and Age-Related Diseases. Biomedicines 2021; 9:1335. [PMID: 34680452 PMCID: PMC8533433 DOI: 10.3390/biomedicines9101335] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 09/20/2021] [Accepted: 09/23/2021] [Indexed: 12/24/2022] Open
Abstract
Telomeres are at the non-coding ends of linear chromosomes. Through a complex 3-dimensional structure, they protect the coding DNA and ensure appropriate separation of chromosomes. Aging is characterized by a progressive shortening of telomeres, which compromises their structure and function. Because of their protective function for genomic DNA, telomeres appear to play an important role in the development and progression of many age-related diseases, such as cardiovascular disease (CVD), malignancies, dementia, and osteoporosis. Despite substantial evidence that links telomere length with these conditions, the nature of these observations remains insufficiently understood. Therefore, future studies should address the question of causality. Furthermore, analytical methods should be further improved with the aim to provide informative and comparable results. This review summarize the actual knowledge of telomere biology and the possible implications of telomere dysfunction for the development and progression of age-related diseases. Furthermore, we provide an overview of analytical techniques for the measurement of telomere length and telomerase activity.
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Affiliation(s)
| | | | - Wilfried Renner
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, 8036 Graz, Austria; (H.-J.G.); (M.D.S.); (M.H.)
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Denham J, Sellami M. Exercise training increases telomerase reverse transcriptase gene expression and telomerase activity: A systematic review and meta-analysis. Ageing Res Rev 2021; 70:101411. [PMID: 34284150 DOI: 10.1016/j.arr.2021.101411] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 06/03/2021] [Accepted: 07/14/2021] [Indexed: 01/12/2023]
Abstract
Telomeres protect genomic stability and shortening is one of the hallmarks of ageing. Telomerase reverse transcriptase (TERT) is the major protein component of telomerase, which elongates telomeres. Given that short telomeres are linked to a host of chronic diseases and the therapeutic potential of telomerase-based therapies as treatments and a strategy to extend lifespan, lifestyle factors that increase TERT gene expression and telomerase activity could attenuate telomere attrition and contribute to healthy biological ageing. Physical activity and maximal aerobic fitness are associated with telomere maintenance, yet the molecular mechanisms remain unclear. Therefore, the purpose of this systematic review and meta-analysis was to identify the influence of a single bout of exercise and long-term exercise training on TERT expression and telomerase activity. A search of human and rodent trials using the PubMed, Scopus, Science Direct and Embase databases was performed. Based on findings from the identified and eligible trials, both a single bout of exercise (n; standardised mean difference [95%CI]: 5; SMD: 1.19 [0.41-1.97], p = 0.003) and long-term exercise training (10; 0.31 [0.03-0.60], p = 0.03) up-regulates TERT and telomerase activity in non-cancerous somatic cells. As human and rodent studies were included in the meta-analyses both exhibited heterogeneity (I2 = 55-87%, p < 0.05). Endurance athletes also exhibited increased leukocyte TERT and telomerase activity compared to their inactive counterparts. These findings suggest exercise training as an inexpensive lifestyle factor that increases TERT expression and telomerase activity. Regular exercise training could attenuate telomere attrition through a telomerase-dependent mechanism and ultimately extend health-span and longevity.
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Affiliation(s)
- Joshua Denham
- RMIT University, School of Health and Biomedical Sciences, Melbourne, Victoria, Australia.
| | - Maha Sellami
- Physical Education Department (PE), College of Education, Qatar University, Doha, Qatar
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Symons GF, Clough M, Fielding J, O'Brien WT, Shepherd CE, Wright DK, Shultz SR. The Neurological Consequences of Engaging in Australian Collision Sports. J Neurotrauma 2021; 37:792-809. [PMID: 32056505 DOI: 10.1089/neu.2019.6884] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Collision sports are an integral part of Australian culture. The most common collision sports in Australia are Australian rules football, rugby union, and rugby league. Each of these sports often results in participants sustaining mild brain traumas, such as concussive and subconcussive injuries. However, the majority of previous studies and reviews pertaining to the neurological implications of sustaining mild brain traumas, while engaging in collision sports, have focused on those popular in North America and Europe. As part of this 2020 International Neurotrauma Symposium special issue, which highlights Australian neurotrauma research, this article will therefore review the burden of mild brain traumas in Australian collision sports athletes. Specifically, this review will first provide an overview of the consequences of mild brain trauma in Australian collision sports, followed by a summary of the previous studies that have investigated neurocognition, ocular motor function, neuroimaging, and fluid biomarkers, as well as neuropathological outcomes in Australian collision sports athletes. A review of the literature indicates that although Australians have contributed to the field, several knowledge gaps and limitations currently exist. These include important questions related to sex differences, the identification and implementation of blood and imaging biomarkers, the need for consistent study designs and common data elements, as well as more multi-modal studies. We conclude that although Australia has had an active history of investigating the neurological impact of collision sports participation, further research is clearly needed to better understand these consequences in Australian athletes and how they can be mitigated.
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Affiliation(s)
- Georgia F Symons
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Meaghan Clough
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Joanne Fielding
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - William T O'Brien
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Claire E Shepherd
- Neuroscience Research Australia, The University of New South Wales, Sydney, New South Wales, Australia
| | - David K Wright
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Sandy R Shultz
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia.,Department of Medicine, The University of Melbourne, Parkville, Victoria, Australia
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