Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/48395

TitleCaloric restriction alleviates alpha-synuclein toxicity in aged yeast cells by controlling the opposite roles of Tor1 and Sir2 on autophagy
Author(s)Guedes, Ana
Ludovico, Paula
Marques, Maria Belém Sousa Sampaio
KeywordsCaloric restriction
Autophagy
Sirtuins
Alpha-synuclein
Synucleinopathies
Issue date2017
PublisherElsevier
JournalMechanisms of Ageing and Development
Abstract(s)Alpha-synuclein (syn) is the main component of proteinaceous inclusions known as Lewy bodies (LB5), which are implicated in the pathogenesis of the neurodegenerative diseases known as synucleinopathies, like Parkinson's disease (PD). Aging is a major risk factor for PD and thus, interventions that delay aging will have promising effects in PD and other synucleinopathies. Caloric restriction (CR) is the only non genetic intervention shown to promote lifespan extension in several model organisms. CR has been shown to alleviate syn toxicity and herein we confirmed the same effect on the yeast model for synucleinopathies during chronological lifespan. The data gathered showed that TOR1 deletion also results in similar longevity extension and abrogation of syn toxicity. Intriguingly, these interventions were associated with decreased autophagy, which was maintained at homeostatic levels. Autophagy maintenance at homeostatic levels promoted by CR or TOR1 abrogation in syn-expressing cells was achieved by decreasing Sir2 levels and activity. Furthermore, the opposite function of Torl and Sir2 in autophagy is probably associated with the maintenance of autophagy activity at homeostatic levels, a central event linked to abrogation of syn toxicity promoted by CR.
TypeArticle
URIhttp://hdl.handle.net/1822/48395
DOI10.1016/j.mad.2016.04.006
ISSN0047-6374
e-ISSN1872-6216
Publisher versionhttps://www.journals.elsevier.com/mechanisms-of-ageing-and-development
Peer-Reviewedyes
AccessOpen access
Appears in Collections:ICVS - Artigos em Revistas Internacionais com Referee

Files in This Item:
File Description SizeFormat 
untitled.pdf1,17 MBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID