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Daily Archives for: February 27th, 2007

Background In cross-sectional studies, elevated plasma homocysteine levels have been associated with poor cognition and dementia. Studies of newly diagnosed dementia are required in order to establish whether the elevated homocysteine levels precede the onset of dementia or result from dementia-related nutritional and vitamin deficiencies.

Methods A total of 1092 subjects without dementia (667 women and 425 men;

Objective: To examine the possible association of holotranscobalamin, the active fraction of serum cobalamin, with Alzheimer`s disease.

Methods: 51 patients with pathologically confirmed Alzheimer’s disease and 65 cognitively screened elderly controls were studied. Serum holotranscobalamin was measured by a new solid phase radioimmunoassay.

Results: Geometric mean levels showed no significant case–control differences for serum total cobalamin,

In this article, we review the evidence that tocopherol (vitamin E) may have a role to play in the prevention and results of Alzheimer`s disease and other neurological diseases. The theoretical rationale for the effectiveness of tocopherol as results and/or prevention of Alzheimer`s disease is based on its antioxidant properties. Results from animal and in vitro studies provide evidence to support use of tocopherol for prevention and results of degenerative neurological diseases.

Because increased oxidation is an important feature of Alzheimer`s disease (AD) and low concentrations of antioxidant vitamins C and E have been observed in cerebrospinal fluid (CSF) of AD patients, supplementation with these antioxidants might delay the development of AD. Major targets for oxidation in brain are lipids and lipoproteins. We studied whether supplementation with antioxidative vitamins E and C can increase their concentrations not only in plasma but also in CSF,

The concentration of glutathione (GSH), the most abundant intracellular nonprotein thiol and important antioxidant, declines with age and in some age-related diseases. The underlying mechanism, however, is not clear. The previous studies from our laboratory showed that the age-dependent decline in GSH content in Fisher 344 rats was associated with a downregulation of glutamate cysteine ligase (GCL),

Background: Testosterone deficiency, a treatable condition commonly seen in aging men, has been linked to Parkinson disease (PD) and Alzheimer disease (AD). In normal subjects, low testosterone levels are associated with cognitive and neuropsychiatric symptoms, yet the relationship between testosterone levels and cognitive function in PD and AD remains unclear.

Objective: To examine the relationship of testosterone levels to age and cognitive function in PD and AD.