期刊
NATURE MEDICINE
卷 14, 期 10, 页码 1106-1111出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/nm.1872
关键词
-
资金
- German Federal Department of Education, Science and Technology BMBF [3013185]
Because of their abundance, resistance to proteolysis, rapid aggregation and neurotoxicity, N-terminally truncated and, in particular, pyroglutamate (pE)-modified A beta peptides have been suggested as being important in the initiation of pathological cascades resulting in the development of Alzheimer's disease(1-6). We found that the N-terminal pE-formation is catalyzed by glutaminyl cyclase in vivo. Glutaminyl cyclase expression was upregulated in the cortices of individuals with Alzheimer's disease and correlated with the appearance of pE-modified A beta. Oral application of a glutaminyl cyclase inhibitor resulted in reduced A beta(3(pE)-42) burden in two different transgenic mouse models of Alzheimer's disease and in a new Drosophila model. Treatment of mice was accompanied by reductions in A beta(x-40/42), diminished plaque formation and gliosis and improved performance in context memory and spatial learning tests. These observations are consistent with the hypothesis that A beta(3(pE)-42) acts as a seed for A beta aggregation by self-aggregation and co-aggregation with A beta(1-40/42). Therefore, A beta(3(pE)-40/42) peptides seem to represent A beta forms with exceptional potency for disturbing neuronal function. The reduction of brain pE-A beta by inhibition of glutaminyl cyclase offers a new therapeutic option for the treatment of Alzheimer's disease and provides implications for other amyloidoses, such as familial Danish dementia.
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