Part of the inflammatory response in Alzheimer┤s disease (AD) is the upregulation of the inducible nitric oxide synthase NOS2 resulting in increased NO production. NO contributes to cell signaling by inducing posttranslational protein modifications. Under pathological conditions there is a shift to the formation of protein tyrosine nitration by secondary products like peroxynitrite and nitrogen dioxide. The invention is based on the finding that amyloid ▀ (A▀) is nitrated at tyrosine 10 in AD-brains. Nitration accel-erates its aggregation and is present in A▀ plaques. Injection of the nitrated protein into the brain of APP/PS1 transgenic mice leads to ▀-amyloidosis. An antibody specific to the nitrated form of A▀ has been developed. A therapeutic approach interfering with the nitrated A▀ (rather than with the native A▀-peptide) may provide a very specific treatment with a reduced risk of side-effects. Commercial Opportunities: The invention offers a novel approach for an early diagnosis of AD. The invention also opens new avenues for developing either NCEs or biologicals interfering with the nitrated A▀. Antibody-based therapeutic approaches (e.g. passive/active vaccination) are currently been developed. Prophylactic approaches are also conceivable. On behalf of University of Bonn, PROvendis offers access to rights for commercial use as well as the opportunity for further co-development.
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