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vitamin C dissolves toxic protein aggregates in Alzheimer's disease

Posted by (Service User Network) Sun Cornwall & Plymouth on 27 November, 2011 at 22:05

Treatment with vitamin C dissolves toxic protein aggregates in Alzheimer's disease

August 18th, 2011 in Research

Researchers at Lund University have discovered a new function for vitamin C. Treatment with vitamin C can dissolve the toxic protein aggregates that build up in the brain in Alzheimer's disease. The research findings are now being presented in the Journal of Biological Chemistry.

The brains of people with Alzheimer's disease contain lumps of so-called amyloid plaques which consist of misfolded protein aggregates. They cause nerve cell death in the brain and the first nerves to be attacked are the ones in the brain's memory centre.

"When we treated brain tissue from mice suffering from Alzheimer's disease with vitamin C, we could see that the toxic protein aggregates were dissolved. Our results show a previously unknown model for how vitamin C affects the amyloid plaques", says Katrin Mani, reader in Molecular Medicine at Lund University.

"Another interesting finding is that the useful vitamin C does not need to come from fresh fruit. In our experiments, we show that the vitamin C can also be absorbed in larger quantities in the form of dehydroascorbic acid from juice that has been kept overnight in a refrigerator, for example".

There is at present no treatment that cures Alzheimer's disease, but the research is aimed at treatments and methods to delay and alleviate the progression of the disease by addressing the symptoms.

That antioxidants such as vitamin C have a protective effect against a number of diseases, from the common cold to heart attacks and dementia, has long been a current focus of research.

"The notion that vitamin C can have a positive effect on Alzheimer's disease is controversial, but our results open up new opportunities for research into Alzheimer's and the possibilities offered by vitamin C", says Katrin Mani.

More information: Suppression of amyloid beta A11-immunoreactivity by vitamin C: possible role of heparan sulfate oligosaccharides derived from glypican-1 by ascorbate-induced, NO-catalyzed degradation. Fang Cheng, Roberto Cappai, G.D. Ciccotosto, Gabriel Svensson, Gerd Multhaup, Lars-Åke Fransson and Katrin Mani. Journal of Biological Chemistry, 286, 27559-27572, 2011.

Provided by Lund University

Categories: NEWS, RESEARCH, ALZHEIMER'S DISEASE /MEMORY

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