Zwarte bessen tegen Alzheimer.*

Uit een celonderzoek in Nieuw Zeeland blijkt dat zwarte bessen het ontstaan van de ziekte van Alzheimer kunnen voorkomen zo niet duidelijk uitstellen. Het zijn de bioactieve stoffen antocyanidines en polyfenolen die hiervoor verantwoordelijk lijken te zijn. Hoe donkerder de bes hoe beter. Een vergelijkbare soort, een kruising tussen framboos en braam, is even effectief.

Blackcurrants Could Prevent Alzheimer's Disease

Research news in the Journal of the Science of Food and Agriculture Compounds in blackcurrants could prevent Alzheimer's disease and the characteristics of British berries suggest they do it best, writes Jennifer Rohn in Chemistry & Industry magazine.
New research led by Dilip Ghosh of the Horticulture and Food Research Institute in New Zealand, shows that compounds in blackcurrants have a potent protective effect in cultured neuronal cells against the types of stress caused by dopamine and amyloid-b, a peptide associated with Alzheimer's disease.
'These compounds also work in hippocampal cells taken straight from the brain,' researcher James Joseph of Tufts University told Chemistry & Industry. Joseph says that the effect will likely be reproduced in the human body and that blackcurrants could help prevent or significantly delay the onset of Alzheimer's.
Blackcurrants and boysenberries, more common in the US, both contain anthocyanins and polyphenolics. British blackcurrants are bred to be darker, which means they have more anthocyanins and are likely to be more potent.
Compounds from these berries are already known to act as antioxidants, but a role in neuroprotection has not been demonstrated previously, according to the researchers.
The mechanism of action is unclear. But James said: 'We have evidence that the compounds protect against Alzheimer's by influencing the early gene expression in learning and memory, which influences cell signaling pathways that help neuronal cells communicate with each other.'
Dilip's team recently demonstrated the potent protective effect of blackcurrant compounds on cultured human promyeloyte and neuroblastoma cells assaulted by hydrogen peroxide (JSFA doi: 10.1002/jsfa.0247).
Article: "Effects of anthocyanins and other phenolics of boysenberry and blackcurrant as inhibitors of oxidative stress and damage to cellular DNA in SY-SY5Y and HY-60 cells" by D. Ghosh et. al JSFA, 10.1002/jsfa.2409.
The Journal of the Science of Food and Agriculture (JSFA) publishes peer-reviewed original research and critical reviews in these areas, with particular emphasis on interdisciplinary studies at the agriculture/food interface. This international journal covers fundamental and applied research.
JSFA is an SCI journal, published by John Wiley & Sons, on behalf of the Society of Chemical Industry, and is available in print (ISSN: 0022-5142) and online (ISSN: 1097-0010) via Wiley InterScience www.interscience.wiley.com
For further information about the journal go to interscience.wiley.com/jsfa
SCI is a unique international forum where science meets business on independent, impartial ground. Anyone can join, and the Society offers a chance to share information between sectors as diverse as food and agriculture, pharmaceuticals, biotechnology, environmental science and safety. As well as publishing new research and running events, SCI has a growing database of member specialists who can give background information on a wide range of scientific issues. Originally established in 1881, SCI is a registered charity with members in over 70 countries.
John Wiley & Sons, Inc.
http://www.interscience.wiley.com  (Januari 2006)