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Lin S, Gao M, Zhang J, Wu Y, Yu T, Peng Y, Jia Y, Zou H, Lu L, Li D, Ma Y. Sleep onset time as a mediator in the association between screen exposure and aging: a cross-sectional study. GeroScience 2024:10.1007/s11357-024-01321-x. [PMID: 39190220 DOI: 10.1007/s11357-024-01321-x] [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: 06/20/2024] [Accepted: 08/19/2024] [Indexed: 08/28/2024] Open
Abstract
Excessive screen exposure has become a significant health concern. This study investigates the impact of screen time on aging in middle-aged and elderly populations. Healthy working adults over 45 years old in Shanghai, China, underwent general and ocular examinations. Questionnaires collected demographics, medical history, and screen exposure details. Aging was assessed using the retinal age gap, defined as the difference between the retinal age predicted by deep learning algorithms based on fundus images and chronological age. Pathway analysis tested the mediation effect of sleep duration and onset time on the relationship between screen usage and retinal age gap. The retinal age gap increased with longer screen exposure, from 0.49 ± 3.51 years in the lowest tertile to 5.13 ± 4.96 years in the highest tertile (Jonckheere-Terpstra test, p < 0.001). Each additional hour of screen exposure accelerated the retinal age gap by 0.087 years (95% CI, 0.027, 0.148, p = 0.005) in the fully adjusted linear model. Sleep onset time mediated the impact of screen usage on the retinal age gap (indirect effect, β = 0.11; 95% CI 0.04-0.24). The impact of screen usage in a light-off environment on the retinal age gap was fully mediated by sleep onset time (indirect effect, β = 0.22; 95% CI 0.07-0.38), with the proportion being 100%. Our study identified a correlation between excessive screen time and a wider retinal age gap in middle-aged and elderly individuals, likely due to delayed sleep onset. To mitigate the adverse effects on the retina and aging, it is important to limit screen usage and avoid screens before bedtime.
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Affiliation(s)
- Senlin Lin
- Shanghai Eye Diseases Prevention &Treatment Center/ Shanghai Eye Hospital, School of Medicine, Tongji University, No. 1440, Hongqiao Road, Shanghai, 200336, China
- National Clinical Research Center for Eye Diseases, Shanghai, China
- Shanghai Engineering Research Center of Precise Diagnosis and Treatment of Eye Diseases, Shanghai, China
| | - Meng Gao
- Sijing Community Health Service Center, Shanghai, China
| | - Juzhao Zhang
- Shanghai Eye Diseases Prevention &Treatment Center/ Shanghai Eye Hospital, School of Medicine, Tongji University, No. 1440, Hongqiao Road, Shanghai, 200336, China
- National Clinical Research Center for Eye Diseases, Shanghai, China
- Shanghai Engineering Research Center of Precise Diagnosis and Treatment of Eye Diseases, Shanghai, China
| | - Yuting Wu
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Tao Yu
- Shanghai Eye Diseases Prevention &Treatment Center/ Shanghai Eye Hospital, School of Medicine, Tongji University, No. 1440, Hongqiao Road, Shanghai, 200336, China
- National Clinical Research Center for Eye Diseases, Shanghai, China
- Shanghai Engineering Research Center of Precise Diagnosis and Treatment of Eye Diseases, Shanghai, China
| | - Yajun Peng
- Shanghai Eye Diseases Prevention &Treatment Center/ Shanghai Eye Hospital, School of Medicine, Tongji University, No. 1440, Hongqiao Road, Shanghai, 200336, China
- National Clinical Research Center for Eye Diseases, Shanghai, China
- Shanghai Engineering Research Center of Precise Diagnosis and Treatment of Eye Diseases, Shanghai, China
| | - Yingnan Jia
- Key Lab of Public Health Safety of the Ministry of Education, School of Public Health, Fudan University, 130 Dongan Road, Shanghai, 200032, China
- Health Communication Institute, Fudan University, Shanghai, 200032, China
| | - Haidong Zou
- Shanghai Eye Diseases Prevention &Treatment Center/ Shanghai Eye Hospital, School of Medicine, Tongji University, No. 1440, Hongqiao Road, Shanghai, 200336, China
- National Clinical Research Center for Eye Diseases, Shanghai, China
- Shanghai Engineering Research Center of Precise Diagnosis and Treatment of Eye Diseases, Shanghai, China
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, No. 100, Haining Road, Shanghai, 200080, China
| | - Lina Lu
- Shanghai Eye Diseases Prevention &Treatment Center/ Shanghai Eye Hospital, School of Medicine, Tongji University, No. 1440, Hongqiao Road, Shanghai, 200336, China.
- National Clinical Research Center for Eye Diseases, Shanghai, China.
- Shanghai Engineering Research Center of Precise Diagnosis and Treatment of Eye Diseases, Shanghai, China.
| | - Deshang Li
- Shihudang Community Health Service Center, No. 1 to 5, Lane 50, Yanshou Road, Shanghai, China.
| | - Yingyan Ma
- Shanghai Eye Diseases Prevention &Treatment Center/ Shanghai Eye Hospital, School of Medicine, Tongji University, No. 1440, Hongqiao Road, Shanghai, 200336, China.
- National Clinical Research Center for Eye Diseases, Shanghai, China.
- Shanghai Engineering Research Center of Precise Diagnosis and Treatment of Eye Diseases, Shanghai, China.
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, No. 100, Haining Road, Shanghai, 200080, China.
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Zhang Z, Reynolds SR, Stolrow HG, Chen J, Christensen BC, Salas LA. Deciphering the role of immune cell composition in epigenetic age acceleration: Insights from cell-type deconvolution applied to human blood epigenetic clocks. Aging Cell 2024; 23:e14071. [PMID: 38146185 PMCID: PMC10928575 DOI: 10.1111/acel.14071] [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: 08/17/2023] [Revised: 12/04/2023] [Accepted: 12/05/2023] [Indexed: 12/27/2023] Open
Abstract
Aging is a significant risk factor for various human disorders, and DNA methylation clocks have emerged as powerful tools for estimating biological age and predicting health-related outcomes. Methylation data from blood DNA has been a focus of more recently developed DNA methylation clocks. However, the impact of immune cell composition on epigenetic age acceleration (EAA) remains unclear as only some clocks incorporate partial cell type composition information when analyzing EAA. We investigated associations of 12 immune cell types measured by cell-type deconvolution with EAA predicted by six widely-used DNA methylation clocks in data from >10,000 blood samples. We observed significant associations of immune cell composition with EAA for all six clocks tested. Across the clocks, nine or more of the 12 cell types tested exhibited significant associations with EAA. Higher memory lymphocyte subtype proportions were associated with increased EAA, and naïve lymphocyte subtypes were associated with decreased EAA. To demonstrate the potential confounding of EAA by immune cell composition, we applied EAA in rheumatoid arthritis. Our research maps immune cell type contributions to EAA in human blood and offers opportunities to adjust for immune cell composition in EAA studies to a significantly more granular level. Understanding associations of EAA with immune profiles has implications for the interpretation of epigenetic age and its relevance in aging and disease research. Our detailed map of immune cell type contributions serves as a resource for studies utilizing epigenetic clocks across diverse research fields, including aging-related diseases, precision medicine, and therapeutic interventions.
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Affiliation(s)
- Ze Zhang
- Department of EpidemiologyGeisel School of Medicine at DartmouthLebanonNew HampshireUSA
- Dartmouth Cancer CenterDartmouth‐Hitchcock Medical CenterLebanonNew HampshireUSA
- Quantitative Biomedical Sciences ProgramGuarini School of Graduate and Advanced StudiesHanoverNew HampshireUSA
| | - Samuel R. Reynolds
- Department of EpidemiologyGeisel School of Medicine at DartmouthLebanonNew HampshireUSA
| | - Hannah G. Stolrow
- Department of EpidemiologyGeisel School of Medicine at DartmouthLebanonNew HampshireUSA
- Dartmouth Cancer CenterDartmouth‐Hitchcock Medical CenterLebanonNew HampshireUSA
| | - Ji‐Qing Chen
- Department of EpidemiologyGeisel School of Medicine at DartmouthLebanonNew HampshireUSA
- Molecular and Cellular Biology ProgramGuarini School of Graduate and Advanced StudiesHanoverNew HampshireUSA
| | - Brock C. Christensen
- Department of EpidemiologyGeisel School of Medicine at DartmouthLebanonNew HampshireUSA
- Dartmouth Cancer CenterDartmouth‐Hitchcock Medical CenterLebanonNew HampshireUSA
- Quantitative Biomedical Sciences ProgramGuarini School of Graduate and Advanced StudiesHanoverNew HampshireUSA
- Molecular and Cellular Biology ProgramGuarini School of Graduate and Advanced StudiesHanoverNew HampshireUSA
| | - Lucas A. Salas
- Department of EpidemiologyGeisel School of Medicine at DartmouthLebanonNew HampshireUSA
- Dartmouth Cancer CenterDartmouth‐Hitchcock Medical CenterLebanonNew HampshireUSA
- Quantitative Biomedical Sciences ProgramGuarini School of Graduate and Advanced StudiesHanoverNew HampshireUSA
- Molecular and Cellular Biology ProgramGuarini School of Graduate and Advanced StudiesHanoverNew HampshireUSA
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Senkevich K, Pelletier A, Sato C, Liu L, Keil A, Gan-Or Z, Lang AE, Postuma RB, Rogaeva E. DNA Methylation Age Acceleration as a Potential Biomarker for Early Onset of Rapid Eye Movement Sleep Behavior Disorder. Ann Neurol 2023. [PMID: 37794693 DOI: 10.1002/ana.26811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 09/26/2023] [Accepted: 09/27/2023] [Indexed: 10/06/2023]
Abstract
Rapid eye movement sleep behavior disorder (RBD) is the strongest prodromal marker for α-synucleinopathies. The Horvath DNA methylation age (DNAm-age) is an epigenetic clock reflecting biological aging. We found an association of DNAm-age acceleration with RBD age at onset at baseline (N = 162, B = -0.68, standard error [SE] = 0.12, p = 2.59e-08) and follow-up (n = 45, B = -1.07, SE = 0.21, p = 9.73e-06). The result remained similar after accounting for genetic risk factors (eg, RBD polygenic risk score). On average, RBD patients with faster versus slow/normal epigenetic aging had a 5.2-year earlier phenoconversion, and the Cox regression analysis revealed a trend toward significance (n = 53, hazard ratio = 1.05, 95% confidence interval = 0.99-1.11, p = 0.06). Our findings suggest that DNAm-age acceleration is a potential biomarker for earlier RBD onset. ANN NEUROL 2023.
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Affiliation(s)
- Konstantin Senkevich
- The Neuro (Montreal Neurological Institute-Hospital), McGill University, Montreal, QC, Canada
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada
| | - Amélie Pelletier
- Center for Advanced Studies in Sleep Medicine, Montreal Sacre Coeur Hospital, Montreal, QC, Canada
| | - Christine Sato
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada
| | - Lang Liu
- The Neuro (Montreal Neurological Institute-Hospital), McGill University, Montreal, QC, Canada
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada
| | - Allison Keil
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada
| | - Ziv Gan-Or
- The Neuro (Montreal Neurological Institute-Hospital), McGill University, Montreal, QC, Canada
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Anthony E Lang
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada
- Edmond J. Safra Program in Parkinson's Disease, Toronto Western Hospital, Toronto, ON, Canada
- Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, Toronto, ON, Canada
- Division of Neurology, Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - Ronald B Postuma
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada
- Center for Advanced Studies in Sleep Medicine, Montreal Sacre Coeur Hospital, Montreal, QC, Canada
- Research Institute of McGill University Health Centre, Montreal, QC, Canada
| | - Ekaterina Rogaeva
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada
- Division of Neurology, Department of Medicine, University of Toronto, Toronto, ON, Canada
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