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Re: Mercury Contributes To Alzheimer's Disease
 
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Published: 17 y
 
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Re: Mercury Contributes To Alzheimer's Disease


Wenstrup, D., Ehmann, W.D., and Markesbery W.R., "Trace Element Imbalances in Isolated Subcellular Fractions of Alzheimer's Disease Brains" Brain Research, 533 125-131 Elsevier Science Publishers (1990).

ABSTRACT: Concentrations of 13 trace elements (Ag, Br, Co, Cr, Cs, Fe, Hg, K, Na, Rb, Sc, Se, Zn) in isolated subcellular fractions (whole brain, nuclei, mitochondria, microsomes) of temporal lobe from autopsied Alzheimer's disease (AD) patients and normal controls were determined utilizing instrumental neutron activation analysis. Comparison of AD and controls revealed elevated Br (whole brain) and Hg (microsomes) and diminished Rb (whole brain, nuclear and microsomes), Se (microsomes) and Zn (nuclear) in AD. The elevated Br and Hg and diminished Rb are consistent with our previous studies in AD bulk brain specimens. Comparison of element ratios revealed increased Hg/Se, Hg/Zn and Zn/Se mass ratios in AD. Se and Zn play a protective role against Hg toxicity and our data suggest that they are utilized to detoxify Hg in the AD brain. Overall our studies suggest that Hg could be and important toxic element in AD. Whether Hg deposition in AD is a primary or secondary event remains to be determined.
 

 
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