Initiation and Synergistic Fibrillization of Tau and Alpha-Synuclein

Author:

Giasson Benoit I.123,Forman Mark S.123,Higuchi Makoto123,Golbe Lawrence I.123,Graves Charles L.123,Kotzbauer Paul T.123,Trojanowski John Q.123,Lee Virginia M.-Y.123

Affiliation:

1. Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine

2. Institute on Aging, University of Pennsylvania School of Medicine, 3600 Spruce Street, Philadelphia, PA 19104, USA.

3. Department of Neurology, University of Medicine and Dentistry of New Jersey–Robert Wood Johnson Medical School, New Brunswick, NJ 08903, USA.

Abstract

Alpha-synuclein (α-syn) and tau polymerize into amyloid fibrils and form intraneuronal filamentous inclusions characteristic of neurodegenerative diseases. We demonstrate that α-syn induces fibrillization of tau and that coincubation of tau and α-syn synergistically promotes fibrillization of both proteins. The in vivo relevance of these findings is grounded in the co-occurrence of α-syn and tau filamentous amyloid inclusions in humans, in single transgenic mice that express A53T human α-syn in neurons, and in oligodendrocytes of bigenic mice that express wild-type human α-syn plus P301L mutant tau. This suggests that interactions between α-syn and tau can promote their fibrillization and drive the formation of pathological inclusions in human neurodegenerative diseases.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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