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000862747 1001_ $$0P:(DE-HGF)0$$aAgerschou, Emil D.$$b0
000862747 245__ $$aAn engineered monomer binding-protein for α-synuclein efficiently inhibits the proliferation of amyloid fibrils
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000862747 520__ $$aRemoving or preventing the formation of α-synuclein aggregates is a plausible strategy against Parkinson’s disease. To this end we have engineered the β-wrapin AS69 to bind monomeric α-synuclein with high affinity. In cultured cells, AS69 reduced the occurrence of α-synuclein oligomers and of visible α-synuclein aggregates. In flies, AS69 reduced α-synuclein aggregates and the locomotor deficit resulting from α-synuclein expression in neuronal cells. In a mouse model based on the intracerebral injection of pre-formed α-synuclein seed fibrills (PFFs), AS69 co-injection reduced the density of dystrophic neurites observed three months later. In biophysical experiments in vitro, AS69 highly sub-stoichiometrically inhibited auto-catalytic secondary nucleation processes, even in the presence of a large excess of monomer. We present evidence that the AS69-α-synuclein complex, rather than the free AS69, is the inhibitory species responsible for sub-stoichiometric inhibition. These results represent a new paradigm that high affinity monomer binders can be strongly sub-stoichiometric inhibitors of nucleation processes.
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000862747 7001_ $$0P:(DE-HGF)0$$aGalvagnion, Céline$$b3
000862747 7001_ $$0P:(DE-HGF)0$$aKomnig, Daniel$$b4
000862747 7001_ $$0P:(DE-HGF)0$$aNagpal, Akansha$$b5
000862747 7001_ $$0P:(DE-HGF)0$$aGasterich, Natalie$$b6
000862747 7001_ $$0P:(DE-HGF)0$$aHeid, Laetitia$$b7
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000862747 7001_ $$0P:(DE-HGF)0$$aDobson, Christopher M.$$b12
000862747 7001_ $$0P:(DE-HGF)0$$aFalkenburger, Björn H.$$b13$$eCorresponding author
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000862747 7001_ $$0P:(DE-HGF)0$$aBuell, Alexander K.$$b15$$eCorresponding author
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