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  • 1
    In: Journal of Alzheimer's Disease, IOS Press, ( 2023-10-06), p. 1-12
    Abstract: Background: Sedentary behavior is associated with cognitive impairment, but the neuropathological mechanisms underlying their associations are poorly understood. Objective: To investigate the associations of accelerometer-measured sedentary behavior patterns with brain structure and cognition, and further to explore the potential mechanisms. Methods: This community-based study included 2,019 older adults (age≥60 years, 59% women) without dementia derived from participants in the baseline examination of MIND-China (2018–2020). We assessed sedentary parameters using an accelerometer and cognitive function using a neuropsychological test battery. Structural brain markers were assessed on the structural brain MRI scans in a subsample (n = 1,009). Data were analyzed using the general linear, isotemporal substitution, and mediation models. Results: In the total sample (n = 2,019), adjusting for multiple covariates and moderate-to-vigorous-intensity physical activity, longer mean sedentary bout duration was linearly related with lower z-scores of global cognition, verbal fluency, and memory (ptrend  〈  0.05), whereas greater total sedentary time was linearly associated with lower z-scores of global cognition, verbal fluency, and memory only among individuals with long sedentary time ( 〉 10 h/day) (ptrend  〈  0.05); Breaking up sedentary time with same amount of light-intensity physical activity was significantly associated with higher verbal fluency and memory z-scores (p  〈  0.05). In the MRI subsample (n = 1,009), separately entering structural brain MRI markers into the mediation models substantially attenuated the associations of mean sedentary bout duration with global cognition, verbal fluency, and memory z-scores. Conclusion: Prolonged uninterrupted sedentary time is associated with poor global cognition, memory, and verbal fluency among rural older adults, and structural brain markers could partially mediate the association.
    Type of Medium: Online Resource
    ISSN: 1387-2877 , 1875-8908
    Language: Unknown
    Publisher: IOS Press
    Publication Date: 2023
    detail.hit.zdb_id: 2070772-1
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  • 2
    In: SSRN Electronic Journal, Elsevier BV
    Type of Medium: Online Resource
    ISSN: 1556-5068
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
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  • 3
    In: European Journal of Neurology, Wiley, Vol. 29, No. 9 ( 2022-09), p. 2612-2621
    Abstract: Little is known about whether nonalcoholic fatty liver disease (NAFLD) is associated with dementia or the role of serum proinflammatory cytokines in the association. We aimed to investigate the interrelationships of NAFLD, serum cytokines, and dementia among rural‐dwelling older adults. Methods This population‐based cross‐sectional study included 5129 participants (aged ≥60 years; 61.79% women) who were living in rural communities and examined in March 2018–September 2018. NAFLD was defined through transabdominal ultrasound examination in the absence of hepatitis B or excessive alcohol consumption. Serum cytokines were measured in a subsample ( n  = 1686). Dementia, Alzheimer disease (AD), and vascular dementia (VaD) were diagnosed following international criteria. Data were analyzed with logistic regression and mediation models. Results Of the 5129 participants, 455 (8.87%) were detected with moderate‐to‐severe NAFLD, and 292 (5.69%) were diagnosed with dementia (188 with AD and 96 with VaD). The multivariable adjusted odds ratios associated with moderate‐to‐severe (vs. no‐to‐mild) NAFLD were 2.22 (95% confidence interval [CI] = 1.41–3.49) for all‐cause dementia, 1.88 (95% CI = 1.01–3.50) for AD, and 2.62 (95% CI = 1.33–5.17) for VaD. In the cytokine subsample, controlling for multiple potential confounders, moderate‐to‐severe NAFLD was significantly associated with higher levels of serum monocyte chemotactic protein‐1, interleukin‐17A, interleukin‐6 (IL‐6), interleukin‐8, and tumor necrosis factor‐α ( P   〈  0.05). The mediation analysis showed that IL‐6 mediated 12.56% of the association between NAFLD and VaD. Conclusions Moderate‐to‐severe nonalcoholic fatty liver disease is associated with dementia and AD, especially with VaD, among rural‐dwelling Chinese older adults, in which the association with VaD is partly mediated by serum inflammatory cytokines.
    Type of Medium: Online Resource
    ISSN: 1351-5101 , 1468-1331
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2020241-6
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  • 4
    In: Alzheimer's & Dementia: Translational Research & Clinical Interventions, Wiley, Vol. 8, No. 1 ( 2022-01)
    Abstract: Multidomain intervention approaches have emerged as a potential strategy to reduce dementia risk. We sought to describe the baseline assessment approaches, health conditions, and risk profiles for brain aging of participants in the randomized controlled Multimodal INterventions to delay Dementia and disability in rural China (MIND‐China). Methods MIND‐China engaged residents who were ≥60 years of age and living in rural communities in the western Shandong province. In March to September 2018, all participants underwent the core module assessments via face‐to‐face interviews, clinical examinations, neuropsychological testings, and laboratory tests. Specific modules of examination were performed for sub‐samples, including brain magnetic resonance imaging scans, genetic and blood biochemical markers, actigraphy testing, cardiopulmonary coupling analysis for sleep quality and disturbances, audiometric testing, and optical coherence tomography examination. We performed descriptive analysis. Results In total, 5765 participants (74.9% of all eligible residents) undertook the baseline assessments. The mean age was 70.9 years (standard deviation, 5.9), 57.2% were women, 40.6% were illiterate, and 88.3% were farmers. The overall prevalence of common chronic diseases was 67.2% for hypertension, 23.4% for dyslipidemia, 23.5% for heart disease, 14.4% for diabetes mellitus, and 5.4% for dementia. The prevalence rates of hypertension, diabetes mellitus, dyslipidemia, obesity, heart disease, depressive symptoms, and dementia were higher in women than in men ( P  〈  .05). Overall, 87.1% of the participants had at least two of the 15 chronic diseases (89.3% in women vs 84.2% in men, P  〈  .001). Participants examined for the specific modules were younger, more likely to be women, and more educated than those not examined. Discussion Comprehensive baseline assessments of participants in MIND‐China provide extremely valuable data sources for interdisciplinary research into the complex relationships of aging, health, brain aging, and functional consequences among older adults living in the rural communities. Highlights MIND‐China is a multimodal intervention study among rural residents ≥60 years of age. At baseline, 5765 participants undertook the interdisciplinary assessments. The baseline assessments consisted of core module and specific modules. Specific modules included brain magnetic resonance imaging (MRI), blood biomarkers, ActiGraph, cardiopulmonary coupling (CPC), pure‐tone audiometry (PTA), and optical coherence tomography (OCT).
    Type of Medium: Online Resource
    ISSN: 2352-8737 , 2352-8737
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2832891-7
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  • 5
    In: The Journals of Gerontology: Series A, Oxford University Press (OUP), ( 2023-09-30)
    Abstract: The relationships of neutrophils and cytokines with cognitive dysfunction are poorly defined. We aimed to investigate the association of peripheral blood absolute neutrophil count (ANC) with cognitive function in older adults and to further explore the mediating role of serum cytokines in this association. Methods This population-based cohort study included 1,666 dementia-free participants (age ≥60 years) derived from baseline examinations (March-September 2018) of the Multimodal Intervention to Delay Dementia and Disability in Rural China (MIND-China); of these, 1,087 participants completed follow-up examinations in October-December 2019. We used a neuropsychological test battery to assess episodic memory, verbal fluency, attention, and executive function at the baseline and follow-up examinations. We used Mindray BC-6800 automated hematology analyzer to measure ANC and Meso Scale Discovery to measure serum interleukin-6 (IL-6) and eotaxin-3. Results The linear regression analysis of cross-sectional data at baseline (n=1,666) suggested that increased ANC was significantly associated with a lower episodic memory z-score (multivariable-adjusted β coefficient: -0.149, 95% CI: -0.274 to -0.023) and lower long-delayed free recall z-score (-0.216, -0.361 to -0.070). Serum IL-6 and eotaxin-3 could mediate 16.16% to 20.21% and 7.55% to 9.35%, respectively, of these associations. The analysis of longitudinal data (n=1,087) showed a J-shaped relationship of ANC with decline in episodic memory z-score (p for nonlinear=0.049), and a U-shaped relationship between ANC and decline in long-delayed free recall z-score (p for nonlinear=0.043). Conclusions Increased neutrophils are associated with poor cognitive performance and accelerated decline in episodic memory, and the cross-sectional association is partly mediated by serum cytokines.
    Type of Medium: Online Resource
    ISSN: 1079-5006 , 1758-535X
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2023
    detail.hit.zdb_id: 2043927-1
    SSG: 12
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  • 6
    In: The American Journal of Geriatric Psychiatry, Elsevier BV, ( 2023-9)
    Type of Medium: Online Resource
    ISSN: 1064-7481
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2023
    detail.hit.zdb_id: 1474415-6
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  • 7
    In: Current Alzheimer Research, Bentham Science Publishers Ltd., Vol. 19, No. 10 ( 2022-09), p. 724-733
    Abstract: Early-onset Alzheimer’s disease (EOAD) is highly influenced by genetic factors. Numerous mutations in amyloid precursor protein (APP) and presenilin 1 and 2 (PSEN1 and PSEN2) have been identified for EOAD, but they can only account for a small proportion of EOAD cases. Objective: This study aimed to screen genetic mutations and variants associated with EOAD among Han Chinese adults. Methods: This study included 34 patients with EOAD and 26 controls from a population-based study and neurological ward. We first sequenced mutations in APP/PSENs and then performed whole-exome sequencing in the remaining patients with negative mutations in APP/PSENs to screen for additional potential genetic variants. Among patients who were negative in genetic screening tests, we further evaluated the risk burden of genes related to the Aβ metabolism-centered network to search for other probable causes of EOAD. Results: We identified 7 functional variants in APP/PSENs in 8 patients, including 1 APP mutation (p. Val715Met), 3 PSEN1 mutations (p. Phe177Ser; p. Arg377Met; p. Ile416Thr), and 3 PSEN2 mutations (p. Glu24Lys; p. Gly34Ser; p. Met239Thr). Of the remaining 26 EOAD cases without mutations in APP/PSENs, the proportion of carrying rare variants of genes involved in Aβ and APP metabolism was significantly higher than that of controls (84.6% vs. 73.1%, P=0.042). Thirty-one risk genes with 47 variants were identified in 22 patients. However, in 26 normal subjects, only 20 risk genes with 29 variants were identified in 19 subjects. Conclusions: Our findings demonstrate the role of APP/PSENs mutations in EOAD, identifying a new PSEN2 missense mutation, and further offer valuable insights into the potential genetic mechanisms of EOAD without APP/PSENs mutations among Han Chinese.
    Type of Medium: Online Resource
    ISSN: 1567-2050
    Language: English
    Publisher: Bentham Science Publishers Ltd.
    Publication Date: 2022
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  • 8
    In: Journal of Alzheimer's Disease, IOS Press, Vol. 94, No. 4 ( 2023-08-15), p. 1515-1526
    Abstract: Background: Evidence has emerged that altered ventricular electrocardiogram profiles are associated with dementia, but the neuropathological mechanisms underlying their associations are poorly understood. Objective: To investigate the interrelationships of ventricular electrocardiogram profiles with dementia and plasma Alzheimer’s disease (AD) biomarkers among older adults. Methods: This population-based cross-sectional study included 5,153 participants (age ≥65 years; 57.3% women) living in rural communities in China; of these, 1,281 had data on plasma amyloid-β (Aβ)40, Aβ42, total-tau, and neurofilament light chain (NfL) protein. The QT, QTc, JT, JTc, QRS intervals, and QRS axis were derived from the 10-second electrocardiogram recording. The DSM-IV criteria were followed for clinical diagnosis of dementia, the NIA-AA criteria for AD, and the NINDS-AIREN criteria for vascular dementia (VaD). Data were analyzed using general linear models, multinomial logistic models, and restricted cubic splines. Results: Of the 5,153 participants, 299 (5.8%) were diagnosed with dementia, including 194 with AD and 94 with VaD. Prolonged QT, QTc, JT, and JTc intervals were significantly associated with all-cause dementia, AD, and VaD (p  〈  0.05). Left QRS axis deviation was significantly associated with all-cause dementia and VaD (p  〈  0.01). In the subsample of plasma biomarkers (n = 1,281), prolonged QT, JT, and JTc intervals were significantly associated with a lower Aβ42/Aβ40 ratio and higher plasma NfL concentrations (p  〈  0.05). Conclusion: Alterations in ventricular repolarization and depolarization are independently associated with all-cause dementia, AD, VaD, and AD plasma biomarkers in older adults (age ≥65 years). Ventricular electrocardiogram parameters may be valuable clinical markers for dementia and the underlying AD pathologies and neurodegeneration.
    Type of Medium: Online Resource
    ISSN: 1387-2877 , 1875-8908
    Language: Unknown
    Publisher: IOS Press
    Publication Date: 2023
    detail.hit.zdb_id: 2070772-1
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  • 9
    In: American Journal of Gastroenterology, Ovid Technologies (Wolters Kluwer Health), Vol. 118, No. 3 ( 2023-03), p. 569-573
    Abstract: The relationships between sedentary behavior patterns and nonalcoholic fatty liver disease (NAFLD) in older adults are not well investigated. METHODS: This population-based study included 1,899 rural-dwelling adults (aged 60 years or older). We assessed sedentary parameters with ActiGraph and defined NAFLD using ultrasonography. RESULTS: Long total and prolonged sedentary time were associated with increased likelihoods of NAFLD, whereas engaging more breaks per sedentary hour and reallocating sedentary time to light-intensity physical activity were associated with reduced likelihoods of NAFLD (P linear 〈 0.05). DISCUSSION: Shorter sedentary time, engaging more frequent breaks in sedentary behavior, and replacing sedentary time with physical activity are associated with reduced likelihoods of NAFLD in older adults.
    Type of Medium: Online Resource
    ISSN: 0002-9270 , 1572-0241
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2023
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  • 10
    In: Alzheimer's & Dementia, Wiley, Vol. 16, No. S10 ( 2020-12)
    Abstract: Epidemiologic studies have estimated that around one‐third of dementia patients worldwide might be attributable to seven modifiable risk factors. This implies that interventions to improve the control of modifiable risk factors may delay the onset of age‐related cognitive disorders such as dementia. We presented the study design and progress of the ongoing randomized controlled multimodal interventions to delay dementia and disability in rural China (MIND‐CHINA). Methods MIND‐CHINA is designed as a 2‐year cluster‐randomized, controlled, multimodal intervention study, which targets people who are aged 60‐79 years and living in the rural communities of Yanlou Town, western Shandong Province, China. Following the baseline examination, 52 villages in Yanlou Town are randomly (cluster‐randomization) divided into three groups: control group (regular primary health care service), vascular intervention group, and multimodal intervention group. The multimodal intervention program consists of four modules that are sensitive to Chinese lifestyle and sociocultural tradition; medical control of vascular risk factors; lifestyle and nutritional guidelines; group physical exercise and personalized leisure activities; and cognitive training. Results In March‐October 2018, we carried out baseline assessment for MIND‐CHINA that integrated our special examinations with the National Primary Health Care Services, during which 5764 persons were examined. We collected the following data through face‐to‐face interviews, clinical examination, testing, and laboratory tests: epidemiological, clinical, and biochemical data as well as physical function, cognitive function, mild cognitive impairment, and dementia. In May‐September 2019, the pilot study was completed to test the feasibility of the intervention programs and the implementation procedure in 7 villages (2 villages in control group, 3 villages in vascular intervention group, and 2 villages in multimodal intervention group). Recruitment of participants for interventions started in Oct/November 2019, and 2265 participants have been successfully recruited so far. Conclusion It is feasible to integrate a comprehensive health examination program with local primary health care services in rural‐dwelling elderly Chinese people. MIND‐CHINA will be likely to address whether multimodal interventions sensitive to Chinese lifestyle and socioculture help maintain cognitive and physical functioning among community‐dwelling elderly people in rural areas.
    Type of Medium: Online Resource
    ISSN: 1552-5260 , 1552-5279
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2201940-6
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