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Iwagami M, Seol J, Hiei T, Tani A, Chiba S, Kanbayashi T, Kondo H, Tanaka T, Yanagisawa M. Association between electroencephalogram-based sleep characteristics and physical health in the general adult population. Sci Rep 2023; 13:21545. [PMID: 38066043 PMCID: PMC10709300 DOI: 10.1038/s41598-023-47979-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Accepted: 11/20/2023] [Indexed: 12/18/2023] Open
Abstract
We examined the associations between electroencephalogram (EEG)-based sleep characteristics and physical health parameters in general adults via a cross-sectional study recruiting 100 volunteers aged 30-59 years. Sleep characteristics were measured at home using a portable multichannel electroencephalography recorder. Using the k-means + + clustering method, according to 10 EEG-based parameters, participants were grouped into better (n = 39), middle (n = 46), and worse (n = 15) sleep groups. Comparing 50 physical health parameters among the groups, we identified four signals of difference (P < 0.05), including systolic (sBP) and diastolic blood pressure (dBP), γ-glutamyl transpeptidase (γ-GTP), and serum creatinine, where sBP reached a Bonferroni-corrected threshold (P < 0.001). The sBP was higher by 7.9 (95% confidence interval 1.9-13.9) and 15.7 (7.3-24.0) mmHg before adjustment and 5.4 (- 0.1-10.9) and 8.7 (1.1-16.3) mmHg after adjustment for age, sex, body mass index, smoking, drinking habits, and 3% oxygen desaturation index in the middle and worse sleep groups, respectively, than in the better group. As another approach, among 500 combinations of EEG-based and physical health parameters, there were 45 signals of correlation, of which 4 (N1% and sBP, dBP, γ-GTP, and triglycerides) reached a Bonferroni-corrected threshold (P < 0.0001). Thus, EEG-based sleep characteristics are associated with several physical health parameters, particularly sBP.
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Affiliation(s)
- Masao Iwagami
- International Institute for Integrative Sleep Medicine (IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK.
- Department of Health Services Research, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
| | - Jaehoon Seol
- International Institute for Integrative Sleep Medicine (IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
- Research Center for Overwork-Related Disorders, National Institute of Occupational Safety and Health, Japan (JNIOSH), Kawasaki, Kanagawa, 214-8585, Japan
- R&D Center for Tailor-Made QOL, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan
| | - Tetsuro Hiei
- S'UIMIN Inc., 1-51-1 Hatsudai, Shibuya, Tokyo, 151-0061, Japan
| | - Akihiro Tani
- S'UIMIN Inc., 1-51-1 Hatsudai, Shibuya, Tokyo, 151-0061, Japan
| | - Shigeru Chiba
- International Institute for Integrative Sleep Medicine (IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
- Ibaraki Prefectural Medical Center of Psychiatry, 654 Asahimachi, Kasama, Ibaraki, 309-1717, Japan
- Minamisaitama Hospital, 252 Masumori, Koshigaya, Ibaraki, 343-0012, Japan
| | - Takashi Kanbayashi
- International Institute for Integrative Sleep Medicine (IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
- Ibaraki Prefectural Medical Center of Psychiatry, 654 Asahimachi, Kasama, Ibaraki, 309-1717, Japan
| | - Hideaki Kondo
- International Institute for Integrative Sleep Medicine (IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
- Department of General Medicine, Institute of Biomedical Sciences, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, 852-8521, Japan
| | - Takashi Tanaka
- KRD Nihombashi, 4-4-2 Nihonbashi Honcho, Chuo, Tokyo, 103-0023, Japan
| | - Masashi Yanagisawa
- International Institute for Integrative Sleep Medicine (IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
- S'UIMIN Inc., 1-51-1 Hatsudai, Shibuya, Tokyo, 151-0061, Japan.
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Cannizzaro A, Ronat L, El Haffaf LM, Hanganu A. Associations between neuropsychiatric symptoms of affective and vegetative domains and brain morphology in aging people with mild cognitive impairment and Alzheimer's disease. Int J Geriatr Psychiatry 2023; 38:e5952. [PMID: 37351584 DOI: 10.1002/gps.5952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 06/05/2023] [Indexed: 06/24/2023]
Abstract
OBJECTIVE Neuropsychiatric symptoms (NPS) are common in mild cognitive impairment (MCI) and even more in Alzheimer's disease (AD). The symptom-based cluster including nighttime disturbances, depression, appetite changes, anxiety, and apathy (affective and vegetative symptoms) was associated with an increased risk of dementia in MCI and has common neuroanatomical associations. Our objective was to investigate the differences in brain morphology associations with affective and vegetative symptoms between three groups: cognitively normal older adults (CN), MCI and AD. MATERIAL AND METHODS Alzheimer's Disease Neuroimaging Initiative data of 223 CN, 367 MCI and 175 AD, including cortical volumes, surface areas and thicknesses and severity scores of the five NPS were analyzed. A whole-brain vertex-wise general linear model was performed to test for intergroup differences (CN-MCI, CN-AD, AD-MCI) in brain morphology associations with five NPS. Multiple regressions were conducted to investigate cortical change as a function of NPS severity in the AD-MCI contrast. RESULTS We found (1) signature differences in nighttime disturbances associations with prefrontal regions in AD-MCI, (2) signature differences in NPS associations with temporal regions in AD-MCI for depression and in CN-AD for anxiety, (3) decreased temporal metrics in MCI as nighttime disturbances and depression severity increased, (4) decreased pars triangularis metrics in AD as nighttime disturbances and apathy severity increased. CONCLUSION Each NPS seems to have a signature on brain morphology. Affective and vegetative NPS were primarily associated with prefrontal and temporal regions. These signatures open the possibility of potential future assessments of links between brain morphology and NPS on an individual level.
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Affiliation(s)
- Adriana Cannizzaro
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec, Canada
- Faculté des Arts et des Sciences, Département de Psychologie, Université de Montréal, Montreal, Quebec, Canada
| | - Lucas Ronat
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec, Canada
- Faculté de Médecine, Département de Médecine, Université de Montréal, Montreal, Quebec, Canada
| | - Lyna Mariam El Haffaf
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec, Canada
- Faculté des Arts et des Sciences, Département de Psychologie, Université de Montréal, Montreal, Quebec, Canada
| | - Alexandru Hanganu
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec, Canada
- Faculté des Arts et des Sciences, Département de Psychologie, Université de Montréal, Montreal, Quebec, Canada
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Oxidative Stress in Brain in Amnestic Mild Cognitive Impairment. Antioxidants (Basel) 2023; 12:antiox12020462. [PMID: 36830020 PMCID: PMC9952700 DOI: 10.3390/antiox12020462] [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: 12/21/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 02/16/2023] Open
Abstract
Amnestic mild cognitive impairment (MCI), arguably the earliest clinical stage of Alzheimer disease (AD), is characterized by normal activities of daily living but with memory issues but no dementia. Oxidative stress, with consequent damaged key proteins and lipids, are prominent even in this early state of AD. This review article outlines oxidative stress in MCI and how this can account for neuronal loss and potential therapeutic strategies to slow progression to AD.
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Zhang H, Wang Q, Deng M, Chen Y, Liu W, Huang J, Zhang Z. Association between homocysteine, C-reactive protein, lipid level, and sleep quality in perimenopausal and postmenopausal women. Medicine (Baltimore) 2021; 100:e28408. [PMID: 34941184 PMCID: PMC8701779 DOI: 10.1097/md.0000000000028408] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Accepted: 12/06/2021] [Indexed: 01/05/2023] Open
Abstract
This study aimed to investigate the correlation between homocysteine (HCY), C-reactive protein (CRP), lipid levels, and sleep quality in perimenopausal and postmenopausal women.We collected data from 217 patients (perimenopause and postmenopausal) who visited the gynecological endocrine outpatient department of our hospital between January 2017 and January 2019. The quality and patterns of sleep were measured using the Pittsburgh Sleep Quality Index, and relationships between HCY, CRP, lipid levels, and sleep quality were analyzed according to a Pittsburgh Sleep Quality Index ≥ 8.There were significant differences in age, education level, and occupation among patients with different levels of sleep quality (P < .05). HCY, CRP, total cholesterol, triglyceride, and low-density lipoprotein levels were significantly higher in patients with poor sleep quality than in those with good sleep quality (P < .05). Age, education level, occupation, HCY, CRP, and lipid levels (total cholesterol, triglyceride, low-density lipoprotein, high-density lipoprotein) were all significant influencing factors for sleep quality in perimenopausal and postmenopausal women (all P < .05). After adjusting for age, education level, occupation, HCY, and CRP levels were all significant and independent risk factors for sleep quality in perimenopausal and postmenopausal women (all P < .05).Levels of HCY, CRP, and lipids were significantly correlated with sleep quality in perimenopausal and postmenopausal women. HCY and CRP were identified as independent risk factors for sleep quality in perimenopausal and postmenopausal women, thus providing theoretical support for the clinical improvement of sleep quality.
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Affiliation(s)
- Hongyan Zhang
- Department of Obstetrics and Gynecology, Nanjing Medical University, Nanjing, Jiangsu, China
- Department of Reproductive Medicine Center, Hangzhou Women's Hospital (Hangzhou Maternity and Child Health Care Hospital), Hangzhou, Zhejiang, China
| | - Qianwen Wang
- Department of Obstetrics and Gynecology, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Miao Deng
- Department of Reproductive Medicine Center, Hangzhou Women's Hospital (Hangzhou Maternity and Child Health Care Hospital), Hangzhou, Zhejiang, China
| | - Yijie Chen
- The Fourth Clinical School of Zhejiang Chinese Medicine University, Hangzhou, Zhejiang, China
| | - Wenhua Liu
- Department of Reproductive Medicine Center, Hangzhou Women's Hospital (Hangzhou Maternity and Child Health Care Hospital), Hangzhou, Zhejiang, China
| | - Jian Huang
- Department of Reproductive Medicine Center, Hangzhou Women's Hospital (Hangzhou Maternity and Child Health Care Hospital), Hangzhou, Zhejiang, China
| | - Zhifen Zhang
- Department of Obstetrics and Gynecology, Nanjing Medical University, Nanjing, Jiangsu, China
- Department of Reproductive Medicine Center, Hangzhou Women's Hospital (Hangzhou Maternity and Child Health Care Hospital), Hangzhou, Zhejiang, China
- The Fourth Clinical School of Zhejiang Chinese Medicine University, Hangzhou, Zhejiang, China
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Tseng FC, Huang TC. Using data mining technology to explore homocysteine at low levels. Medicine (Baltimore) 2021; 100:e26893. [PMID: 34414944 PMCID: PMC8376364 DOI: 10.1097/md.0000000000026893] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 07/19/2021] [Indexed: 01/04/2023] Open
Abstract
A high homocysteine level is known to be an independent risk factor for cardiovascular diseases; however, whether or not low homocysteine level contributes to any damage to the body has not been extensively studied. Furthermore, acquiring healthy subject databases from domestic studies on homocysteine is not trivial. Therefore, we aimed to investigate the causality between serum homocysteine levels and health status and lifestyle factors, particularly with a focus on low serum homocysteine levels. Additionally, we discussed a systematic methodical platform for data collection and statistical analysis, using the descriptive analysis of the chi-square test, t test, multivariate analysis of variance, and logistic regression.This study was a cross-sectional analysis of 5864 subjects (i.e., clients of a health examination clinic) in Taipei, Taiwan during a general health check-up in 2017. The patients' personal information and associated links were excluded. A sample group was selected as per the health criteria defined for this research whose data were processed using SPSS for descriptive statistical analysis using chi-square test, t test, multivariate analysis of variance, and logistic regression analysis.Those working for >12 hours/day had a higher homocysteine level than those working for <12 hours/day (P < .001). The average serum homocysteine level was 7.9 and 8.6 mol/L for people with poor sleep quality and good sleep quality, respectively (P = .003). The homocysteine value of people known to have cancer was analyzed using the logistic regression analysis, revealing a Δodds value of 0.898. The percentage of subjects with a homocysteine value of ≤6.3 μmol/L, who perceived their health status as "not very good" or "very bad," was higher than those with a higher homocysteine level. The number of subjects who perceived their health as poor was higher than expected.The results suggest that the homocysteine level could be an effective health management indicator. We conclude that normal homocysteine level should not be ≤6.3 μmol/L. Moreover, homocysteine should not be considered as harmful and its fluctuations from the normal range could be utilized to infer a person's physical status for health management.
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Affiliation(s)
- Fei-Ching Tseng
- The Lianan Wellness Center of the Lianan Preventative Medicine Institution, Songshan District, Taipei City
| | - Tin-Chung Huang
- Ching-Kuo Institute of Management and Health – Graduate School of Health Industry, Zhongshan District, Keelung City, Taiwan
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Associations between vitamin E, oxidative stress markers, total homocysteine levels, and physical activity or cognitive capacity in older adults. Sci Rep 2021; 11:12867. [PMID: 34145349 PMCID: PMC8213688 DOI: 10.1038/s41598-021-92076-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 06/04/2021] [Indexed: 02/05/2023] Open
Abstract
This study examined the associations between vitamin E, oxidative stress markers, total homocysteine levels, and physical activity or cognitive capacity in older adults. One hundred and six older adults (62 men, 44 women) within the age range of 56-81 years participated. The Global Physical Activity Questionnaire and the Loewenstein Occupational Therapy Cognitive Assessment were used to assess physical activity and cognitive function, respectively. Vitamin E (e.g., α-tocopherol and γ-tocopherol), oxidative stress markers (e.g., total antioxidant capacity and nitric oxide), and total homocysteine were estimated. There were significant associations between physical activity (high versus moderate versus poor) and all biomarkers (all p = 0.000, and p = 0.010 for γ-tocopherol). While total homocysteine and total antioxidant capacity were significantly associated with cognitive capacity (p = 0.000), vitamin E levels (e.g., α-tocopherol and γ-tocopherol) and nitric oxide (p = 0.354, 0.103 and 0.060, respectively) were not related to cognitive capacity in older adults. This study concludes that physical activity was associated with Vitamin E, oxidative stress markers, total homocysteine, and cognitive capacity in older adults. Although cognitive capacity was associated with total homocysteine and total antioxidant capacity, it was unrelated to vitamin E levels and nitric oxide in older adults.
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7
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Wang L, Li J, Wang Z, Du Y, Sun T, Na L, Niu Y. Social capital and cognitive decline: Does sleep duration mediate the association? PLoS One 2021; 16:e0252208. [PMID: 34043692 PMCID: PMC8158899 DOI: 10.1371/journal.pone.0252208] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 05/12/2021] [Indexed: 11/18/2022] Open
Abstract
Background Studies have found that social capital (SC) is associated with the risk of cognitive decline; however, the mechanism explaining how SC leads to cognitive decline is unclear. The current study examines the mediation effect of sleep duration on the relationship between SC and cognitive decline in Chinese older adults. Methods A cross-sectional study of 955 community-dwelling aged 60 or over was conducted. The mini-mental state examination (MMSE), self-report sleep duration questionnaire, and social capital scales were administered during the face-to-face survey. The Bootstrap methods PROCESS program is employed to test the mediation model. Results After controlling for covariates, both social cohesion and social interaction were positively correlated with the MMSE score (p<0.001), and social cohesion was negatively correlated with sleep duration (p = 0.009); On the contrary, sleep duration was negatively correlated with MMSE score (p<0.001). Linear regression analysis showed social cohesion was positively associated with the MMSE score (β = 0.16, p = 0.005), while sleep duration was associated with an increased risk of cognitive decline (β = -0.72, p<0.001). Sleep duration has mediated the relationship between social cohesion and cognitive decline (explaining 21.7% of the total variance). Conclusions Social capital negatively associated with the risk of cognitive decline in this Chinese population, and sleep duration may partly explain this relationship. It may be a suggestive clue to identify those at a higher risk of progressing to cognitive impairment. Further prospective study in need to confirm this finding due to the cross-sectional design.
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Affiliation(s)
- Liqun Wang
- Department of Epidemiology and Statistics, School of Public Health and Management at Ningxia Medical University, Yinchuan, China
| | - Jiangping Li
- Department of Epidemiology and Statistics, School of Public Health and Management at Ningxia Medical University, Yinchuan, China
| | - Zhizhong Wang
- Department of Epidemiology and Statistics at School of Public Health of Guangdong Medical University, Dongguan, China
| | - Yong Du
- Surgical Laboratory of General Hospital, Ningxia Medical University, Yinchuan, China.,School of Clinical Medicine at Ningxia Medical University, Yinchuan, China
| | - Ting Sun
- Surgical Laboratory of General Hospital, Ningxia Medical University, Yinchuan, China
| | - Li Na
- Surgical Laboratory of General Hospital, Ningxia Medical University, Yinchuan, China
| | - Yang Niu
- Key Laboratory of the Ningxia Ethnomedicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan, China.,School of Traditional Chinese Medicine, Ningxia Medical University, Yinchuan, China
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Palomar-Bonet M, Atienza M, Hernández-Ledesma B, Cantero JL. Associations of salivary total antioxidant capacity with cortical amyloid beta burden, cortical glucose uptake and cognitive function in normal aging. J Gerontol A Biol Sci Med Sci 2021; 76:1839-1845. [PMID: 33522564 DOI: 10.1093/gerona/glab034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Recognizing vulnerability to Alzheimer's disease (AD) requires from non-invasive, simple, and inexpensive markers that can be easily obtained in primary care settings. While saliva meets all these requirements, there is lack of evidence linking salivary constituents to in vivo AD pathology in aging. METHODS We examined the potential of salivary total antioxidant capacity (TAC) for identifying global cortical amyloid-beta (Aβ) burden, deficits in regional glucose uptake, and poorer cognition in 71 cognitively normal older adults. We further assessed whether salivary TAC-related cognitive performance was associated with higher Aβ load and lower cortical glucose consumption. RESULTS Linear regression analyses adjusted by age, sex, years of education, and ApoE4 status showed that salivary TAC was associated with slower processing speed and poorer sustained attention, as well as with higher Aβ load and lower glucose metabolism in cortical regions vulnerable to cognitive aging and AD. Results also revealed that lower scores in processing speed and sustained attention were associated with greater Aβ burden and lower regional glucose consumption, respectively. CONCLUSIONS Together, these findings support the use of salivary TAC for preventive screening and detection of cerebral vulnerability to AD. Further research is needed to evaluate the utility of salivary TAC as a clinical marker.
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Affiliation(s)
- Miriam Palomar-Bonet
- Laboratory of Functional Neuroscience, Pablo de Olavide University, Seville, Spain
| | - Mercedes Atienza
- Laboratory of Functional Neuroscience, Pablo de Olavide University, Seville, Spain.,CIBERNED, Network Center for Biomedical Research in Neurodegenerative Diseases, Madrid, Spain
| | - Blanca Hernández-Ledesma
- Instituto de Investigación en Ciencias de la Alimentación (CIAL, CSIC-UAM, CEI UAM+CSIC), Madrid, Spain
| | - Jose L Cantero
- Laboratory of Functional Neuroscience, Pablo de Olavide University, Seville, Spain.,CIBERNED, Network Center for Biomedical Research in Neurodegenerative Diseases, Madrid, Spain
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Correlates of Sleep Disturbance among Older Adults with Mild Cognitive Impairment: A Cross-Sectional Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17134862. [PMID: 32640633 PMCID: PMC7369813 DOI: 10.3390/ijerph17134862] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 06/22/2020] [Accepted: 06/29/2020] [Indexed: 11/24/2022]
Abstract
Individuals with mild cognitive impairment (MCI) are at high risk for dementia development. Sleep disturbance is often overlooked in MCI, although it is an important risk factor of cognitive decline. In the absence of a cure for dementia, managing the risk factors of cognitive decline in MCI is likely to delay disease progression. To develop interventions for sleep disturbance in MCI, its related factors should be explored. This study aimed to identify and compare the correlates of sleep disturbance in older adults with MCI and those in cognitively healthy older adults. A comparative cross-sectional study was adopted. Data were obtained from 219 Chinese community-dwelling older adults (female: 70.3%), which consisted of 127 older adults with MCI and 92 age-matched cognitively healthy controls. The candidate correlates of sleep disturbance included socio-demographic correlates, health-related factors, lifestyle-related factors and psychological factor. Descriptive, correlational and regression statistics were used for data analysis. The prevalence of sleep disturbance in MCI was 70.1% compared to that of 56.5% in cognitively healthy controls (p < 0.001). The multivariate analysis indicated that, in participants with MCI, depressive symptoms (Beta = 0.297, p = 0.001), comorbidity burden (Beta = 0.215, p = 0.012) and physical activity (Beta = −0.297, p = 0.001) were associated with sleep disturbance. However, in the cognitively healthy controls, only depressive symptoms (Beta = 0.264, p = 0.028) and comorbidity burden (Beta = 0.361, p = 0.002) were associated with sleep disturbance. This finding highlights that sleep disturbance is sufficiently prominent to warrant evaluation and management in older adults with MCI. Furthermore, the findings elucidate several important areas to target in interventions aimed at promoting sleep in individuals with MCI.
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Blood total antioxidant status is associated with cortical glucose uptake and factors related to accelerated aging. Brain Struct Funct 2020; 225:841-851. [PMID: 32048020 DOI: 10.1007/s00429-020-02039-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Accepted: 01/29/2020] [Indexed: 12/16/2022]
Abstract
Identifying cerebral vulnerability in late life is of paramount importance to prevent pathological trajectories of aging before the onset of symptoms. Considerable evidence suggests that impaired antioxidant mechanisms are a fingerprint of aging-related conditions, but there is a lack of human research linking total antioxidant capacity (TAC) measured in peripheral blood to in vivo brain changes and other factors featuring accelerated aging. To address this issue, we have assessed in cognitively normal elderly subjects (N = 100) correlations between serum TAC, using the oxygen radical absorbance capacity assay, surface-based cortical thickness, surface-based 18F-fluorodeoxyglucose positron emission tomography cortical uptake, and different factors associated with accelerated aging [i.e., serum homocysteine (HCY), self-reported memory problems, and self-reported patterns of physical activity]. While no relationship was observed between serum TAC and variations in cortical thickness, decreased TAC level was significantly associated with lower FDG uptake in temporal lobes bilaterally. Remarkably, decreased TAC level was linked to increased HCY concentrations, more subjective memory complaints, and lower frequency of physical activity. Overall, our results suggest that decreased serum TAC level may be helpful to detect vulnerable trajectories of aging.
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An Y, Feng L, Zhang X, Wang Y, Wang Y, Tao L, Qin Z, Xiao R. Dietary intakes and biomarker patterns of folate, vitamin B 6, and vitamin B 12 can be associated with cognitive impairment by hypermethylation of redox-related genes NUDT15 and TXNRD1. Clin Epigenetics 2019; 11:139. [PMID: 31601260 PMCID: PMC6787977 DOI: 10.1186/s13148-019-0741-y] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Accepted: 09/08/2019] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND B vitamins in the one-carbon metabolism pathway (folate, vitamin B6, and vitamin B12) have been implicated in DNA methylation, and their deficiency may contribute to cognitive decline through increased homocysteine (Hcy) levels and subsequent oxidative damage. The aim of this study was to investigate whether B vitamin deficiency and increased Hcy could interact with DNA methylation of oxidative-related genes and exacerbate cognitive impairment. METHODS Participants were selected from a large cohort study entitled the Effects and Mechanism Investigation of Cholesterol and Oxysterol on Alzheimer's disease (EMCOA) study. We included 2533 participants who completed a selection of comprehensive cognitive tests and a semiquantitative food frequency questionnaire (FFQ) and were followed for an average of 2.3 years. The longitudinal effects of B vitamin intake on cognitive decline were examined using linear mixed-effect models. Seven mild cognitive impairment (MCI) patients, in the predementia stage of Alzheimer's disease (AD), and fivev healthy controls were selected for the discovery of genome-wide differentially methylated CpG sites. Candidate oxidative stress-related genes significantly correlated with serum levels of B vitamins were selected for validation in 102 MCI patients and 68 controls. The correlations between DNA methylation levels and serum concentrations of B vitamins and oxidative biomarkers were analyzed with Spearman's correlation. The interactive effects of DNA methylation and B vitamins on cognitive performance were further evaluated by multiple linear regression. RESULTS In the prospective analysis, inadequate dietary intake of vitamin B12 was significantly associated with accelerated cognitive decline, whereas adequate folate, vitamin B6, and vitamin B12 intakes were significantly associated with better cognitive reserve. In the case-control analysis, the DNA methylation levels of NUDT15 and TXNRD1 were examined, and significantly hypermethylated sites were identified in MCI patients. Significant correlations of hypermethylated sites with serum levels of folate, homocysteine (Hcy), and oxidative biomarkers were observed, and interactive effects of B vitamins and hypermethylated sites were significantly associated with cognitive performance. CONCLUSION Adequate dietary folate at baseline predicted a better cognitive reserve, while decreased serum levels of B vitamins may contribute to cognitive impairment by affecting methylation levels of specific redox-related genes. TRIAL REGISTRATION EMCOA, ChiCTR-OOC-17011882, Registered 5th, July 2017-Retrospectively registered, http://www.medresman.org/uc/project/projectedit.aspx?proj=2610.
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Affiliation(s)
- Yu An
- School of Public Health, Capital Medical University, No.10 Xitoutiao, You An Men Wai, Beijing, 100069, China
| | - Lingli Feng
- School of Public Health, Capital Medical University, No.10 Xitoutiao, You An Men Wai, Beijing, 100069, China.,Peking University First Hospital, Beijing, China
| | - Xiaona Zhang
- School of Public Health, Capital Medical University, No.10 Xitoutiao, You An Men Wai, Beijing, 100069, China
| | - Ying Wang
- School of Public Health, Capital Medical University, No.10 Xitoutiao, You An Men Wai, Beijing, 100069, China
| | - Yushan Wang
- School of Public Health, Capital Medical University, No.10 Xitoutiao, You An Men Wai, Beijing, 100069, China
| | - Lingwei Tao
- School of Public Health, Capital Medical University, No.10 Xitoutiao, You An Men Wai, Beijing, 100069, China
| | | | - Rong Xiao
- School of Public Health, Capital Medical University, No.10 Xitoutiao, You An Men Wai, Beijing, 100069, China.
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Chen TY, Winkelman JW, Mao WC, Yeh CB, Huang SY, Kao TW, Yang CCH, Kuo TBJ, Chen WL. Short Sleep Duration Is Associated With Increased Serum Homocysteine: Insights From a National Survey. J Clin Sleep Med 2019; 15:139-148. [PMID: 30621835 DOI: 10.5664/jcsm.7588] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 10/05/2018] [Indexed: 12/17/2022]
Abstract
STUDY OBJECTIVES Both short sleep duration and increased serum homocysteine levels are associated with cardiovascular events. However, research on the relationship between sleep duration and serum homocysteine levels is sparse. The aim of this study is to examine the association between sleep duration and serum homocysteine levels from a national database. METHODS In total, 4,480 eligible participants older than 20 years who had serum homocysteine data and reported sleep duration were enrolled from the US National Health and Nutrition Examination Survey of 2005 to 2006. The association between sleep duration and serum homocysteine levels was analyzed using multivariate regression models for covariate adjustment. RESULTS Serum homocysteine level was lowest in individuals with a sleep duration of 7 hours and increased in those with both shorter and longer self-reported total sleep time (groups were categorized into ≤ 5 hours, 6 hours, 7 hours, 8 hours, and ≥ 9 hours). After adjustment for covariates, those in the group sleeping ≤ 5 hours had significantly higher serum homocysteine levels than the reference group (sleep duration of 7 hours). In subgroup analyses by sex, body mass index (BMI), and ethnicity, the association between short sleep duration (≤ 5 hours) and higher serum homocysteine levels persisted in women, individuals with obesity (BMI ≥ 30 kg/m2), and non-Hispanic whites. CONCLUSIONS This study highlighted that short sleep duration was associated with higher serum homocysteine levels in women, individuals with obesity (BMI ≥ 30 kg/m2), and non-Hispanic whites; this finding might suggest increased vulnerability to cardiovascular risk or other atherothrombotic events in these groups in the context of short sleep.
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Affiliation(s)
- Tien-Yu Chen
- Department of Psychiatry, Tri-Service General Hospital, Taipei, Taiwan.,School of Medicine, National Defense Medical Center, Taipei, Taiwan.,Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan.,Sleep Research Center, National Yang-Ming University, Taipei, Taiwan
| | - John W Winkelman
- Departments of Psychiatry and Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Wei-Chung Mao
- Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan.,Department of Psychiatry, Cheng Hsin General Hospital, Taipei, Taiwan
| | - Chin-Bin Yeh
- Department of Psychiatry, Tri-Service General Hospital, Taipei, Taiwan.,Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
| | - San-Yuan Huang
- Department of Psychiatry, Tri-Service General Hospital, Taipei, Taiwan.,Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Tung-Wei Kao
- School of Medicine, National Defense Medical Center, Taipei, Taiwan.,Division of Family Medicine and Geriatric Medicine, Department of Family and Community Medicine, Tri-Service General Hospital, Taipei, Taiwan
| | - Cheryl C H Yang
- Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan.,Sleep Research Center, National Yang-Ming University, Taipei, Taiwan
| | - Terry B J Kuo
- Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan.,Sleep Research Center, National Yang-Ming University, Taipei, Taiwan.,Graduate Institute of Biomedical informatics, Taipei Medical University, Taipei, Taiwan
| | - Wei-Liang Chen
- School of Medicine, National Defense Medical Center, Taipei, Taiwan.,Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan.,Division of Family Medicine and Geriatric Medicine, Department of Family and Community Medicine, Tri-Service General Hospital, Taipei, Taiwan
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Abstract
PURPOSE OF REVIEW Research interest in sleep as a risk factor for dementia has grown, warranting an update in advances over the last 18 months, particularly in the mild cognitive impairment (MCI) stage in which interventions may be best targeted. RECENT FINDINGS The current systematic review includes empiric research articles published since 2016 that have investigated sleep (excluding obstructive sleep apnea) in MCI. Published articles include case-control studies, those examining clinical correlates of sleep problems, sleep microarchitecture, neuroimaging studies and novel cerebrospinal and blood-based markers. SUMMARY Evidence accumulated since 2016 continues to demonstrate that people with MCI manifest sleep disturbance on self-report measures. Neurophysiologically, sleep disturbance in MCI appears to be associated with diminished sleep spindles, key processes involved in overnight memory consolidation. Those with both MCI and sleep disturbance appear to have more pronounced functional connectivity alterations in temporoparietal brain regions and higher levels of the wake-promoting neurotransmitter orexin in cerebrospinal fluid than those with MCI alone. Novel findings also suggest that sleep may mediate homocysteine and oxidative stress mechanisms, warranting further exploration. Further studies focusing on novel interventions for sleep and circadian disturbance in MCI are warranted, particularly those targeting sleep spindles, orexin/hypocretin and the oxidative stress system.
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