Alterations in trace elements and oxidative stress in uremic patients with dementia.
The present study was conducted to compare the trace elements and oxidative status between uremic patients with and without dementia. Chronic hemodialysis patients with dementia (n = 20) and without dementia (n = 25), and age-matched healthy volunteers (n = 20) were enrolled. The nutritional status, blood levels of trace elements aluminum (Al), zinc (Zn), copper (Cu), magnesium (Mg) and iron (Fe), malondialdehyde (MDA), and protein carbonyl production, antioxidant enzymes glutathione peroxidase (GPx), and glutathione reductase (GR) activities were measured. No significant difference in nutritional status or clinical characteristics was observed between nondementia and dementia patients. However, uremic patients with dementia have significantly higher Al, Cu, and Mg and lower Zn concentrations, as well as increased Cu/Zn ratio in comparison to nondementia patients. There were statistically significant increased MDA and carbonyl production and decreased GPx and GR activities in dementia patients. Furthermore, the significant associations of Al, Mg, and Cu/Zn ratio with oxidative status in patients with dementia were noted. The dementia may initially worsen with abnormal metabolism of trace elements and oxidative stress occurrence. Our results suggest that abnormalities in trace element levels are associated with oxidative stress and may be a major risk factor in the dementia development of uremic patients.
Guo
Chih-Hung
CH
Institute of Biomedical Nutrition, Hung Kuang University, Taichung, Taiwan, Republic of China. eillyguo@sunrise.hk.edu.tw
Ko
Wang-Sheng
WS
Chen
Pei-Chung
PC
Hsu
Guoo-Shyng W
GS
Lin
Chia-Yeh
CY
Wang
Chia-Liang
CL
D000368:Aged; D000369:Aged, 80 and over; D003300:Copper / Q000097:blood; D003704:Dementia / Q000097:blood / Q000150:complications* / Q000378:metabolism*; D005260:Female; D006801:Humans; D007501:Iron / Q000097:blood; D008274:Magnesium / Q000097:blood; D008297:Male; D008875:Middle Aged; D018384:Oxidative Stress / Q000502:physiology*; D014131:Trace Elements / Q000378:metabolism*; D014511:Uremia / Q000150:complications* / Q000503:physiopathology*; D015032:Zinc / Q000097:blood
D014131:Trace Elements; D003300:Copper; D007501:Iron; D008274:Magnesium; D015032:Zinc