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Sökning: L773:1526 632X > Solomon A

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  • Hooshmand, Babak, et al. (författare)
  • Homocysteine and holotranscobalamin and the risk of Alzheimer disease : a longitudinal study
  • 2010
  • Ingår i: Neurology. - 0028-3878 .- 1526-632X. ; 75:16, s. 1408-1414
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE: To examine the relation between serum levels of homocysteine (tHcy) and holotranscobalamin (holoTC), the active fraction of vitamin B12, and risk of incident Alzheimer disease (AD) in a sample of Finnish community-dwelling elderly. METHODS: A dementia-free sample of 271 subjects aged 65-79 years derived from the Cardiovascular Risk Factors, Aging, and Dementia (CAIDE) study was followed up for 7 years to detect incident AD. The association between serum tHcy and holoTC with AD was analyzed with multiple logistic regression after adjusting for several potential confounders, including common vascular risk factors. RESULTS: The odds ratios (ORs) (95% confidence interval [CI]) for AD were 1.16 (1.04-1.31) per increase of 1 μmol/L of tHcy at baseline and 0.980 (0.965-0.995) for each increase of 1 pmol/L baseline holoTC. Adjustment for several potential confounders including age, sex, education, APOE ε4 allele, body mass index, Mini-Mental State Examination, smoking, stroke, and blood pressure did not alter the associations: ORs (95% CI) for AD became 1.19 (1.01-1.39) for tHcy and 0.977 (0.958-0.997) for holoTC. Adjusting for holoTC attenuated the tHcy-AD link (OR changed from 1.16 to 1.10, 95% CI 0.96-1.25). The holoTC-AD relationship was less influenced by controlling for tHcy (OR changed from 0.980 to 0.984, 95% CI 0.968-1.000). Addition of folate did not change any of the results. CONCLUSIONS: This study suggests that both tHcy and holoTC may be involved in the development of AD. The tHcy-AD link may be partly explained by serum holoTC. The role of holoTC in AD should be further investigated.
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  • Solomon, A., et al. (författare)
  • Serum cholesterol changes after midlife and late-life cognition : Twenty-one-year follow-up study
  • 2007
  • Ingår i: Neurology. - 0028-3878 .- 1526-632X. ; 68:10, s. 751-756
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Longitudinal studies have shown that high serum total cholesterol (TC) at midlife is a risk factor for dementia/Alzheimer disease. The significance of TC later in life is unclear. Objective: To investigate changes in serum TC from midlife to late life and their relationship with late-life cognition. Methods: Participants of the Cardiovascular Risk Factors, Aging and Dementia study were derived from random, population-based samples previously studied in a survey in 1972, 1977, 1982, or 1987. After an average follow-up of 21 years, 1,449 individuals aged 65 to 79 were reexamined in 1998. Results: Serum TC levels decreased in most individuals. High midlife TC represented a risk factor for more severe cognitive impairment later in life, and the values were significantly different between the control, mild cognitive impairment, and dementia groups. There were no significant differences in serum TC at reexamination. A moderate decrease in serum TC from midlife to late life (0.5 to 2 mmol/L) was significantly associated with the risk of a more impaired late-life cognitive status, even after adjusting for age, follow-up time, sex, years of formal education, midlife cholesterol, changes in body mass index, APOE epsilon 4 genotype, history of myocardial infarction/stroke/diabetes, and lipid-lowering treatment. Conclusions: The relationship between serum total cholesterol (TC) and dementia seems to be bidirectional. High midlife serum TC is a risk factor for subsequent dementia/Alzheimer disease, but decreasing serum TC after midlife may reflect ongoing disease processes and may represent a risk marker for late-life cognitive impairment.
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