Autophagy agonists have been proposed to slow down neurodegeneration. Spermidine, a polyamine that acts as an autophagy agonist, is currently under clinical trial for the treatment of age-related memory decline. How Spermidine and other autophagy agonists regulate memory and synaptic plasticity is under investigation. We set up a novel mouse model of mild cognitive impairment (MCI), in which middle-aged (12-month-old) mice exhibit impaired memory capacity, lysosomes engulfed with amyloid fibrils (β-amyloid and α-synuclein) and impaired task-induced GluA1 hippocampal post-translation modifications. Subchronic treatment with Spermidine as well as the autophagy agonist TAT-Beclin 1 rescued memory capacity and GluA1 post-translational modifications by favouring the autophagy/lysosomal-mediated degradation of amyloid fibrils. These findings provide new mechanistic evidence on the therapeutic relevance of autophagy enhancers which, by improving the degradation of misfolded proteins, slow down age-related memory decline.

Mechanisms by which autophagy regulates memory capacity in ageing / De Risi, M.; Torromino, G.; Tufano, M.; Moriceau, S.; Pignataro, A.; Rivagorda, M.; Carrano, N.; Middei, S.; Settembre, C.; Ammassari-Teule, M.; Gardoni, F.; Mele, A.; Oury, F.; De Leonibus, E.. - In: AGING CELL. - ISSN 1474-9718. - 19:9(2020), p. e13189. [10.1111/acel.13189]

Mechanisms by which autophagy regulates memory capacity in ageing

De Risi M.;Torromino G.;Mele A.;De Leonibus E.
2020

Abstract

Autophagy agonists have been proposed to slow down neurodegeneration. Spermidine, a polyamine that acts as an autophagy agonist, is currently under clinical trial for the treatment of age-related memory decline. How Spermidine and other autophagy agonists regulate memory and synaptic plasticity is under investigation. We set up a novel mouse model of mild cognitive impairment (MCI), in which middle-aged (12-month-old) mice exhibit impaired memory capacity, lysosomes engulfed with amyloid fibrils (β-amyloid and α-synuclein) and impaired task-induced GluA1 hippocampal post-translation modifications. Subchronic treatment with Spermidine as well as the autophagy agonist TAT-Beclin 1 rescued memory capacity and GluA1 post-translational modifications by favouring the autophagy/lysosomal-mediated degradation of amyloid fibrils. These findings provide new mechanistic evidence on the therapeutic relevance of autophagy enhancers which, by improving the degradation of misfolded proteins, slow down age-related memory decline.
2020
ageing; alpha-synuclein; amyloid fibrils; autophagy; GluA1; mild cognitive impairment; Spermidine
01 Pubblicazione su rivista::01a Articolo in rivista
Mechanisms by which autophagy regulates memory capacity in ageing / De Risi, M.; Torromino, G.; Tufano, M.; Moriceau, S.; Pignataro, A.; Rivagorda, M.; Carrano, N.; Middei, S.; Settembre, C.; Ammassari-Teule, M.; Gardoni, F.; Mele, A.; Oury, F.; De Leonibus, E.. - In: AGING CELL. - ISSN 1474-9718. - 19:9(2020), p. e13189. [10.1111/acel.13189]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1509015
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