The insulin paradox: Aging, proteotoxicity and neurodegeneration

Ehud Cohen*, Andrew Dillin

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

242 Scopus citations


Distinct human neurodegenerative diseases share remarkably similar temporal emergence patterns, even though different toxic proteins are involved in their onset. Typically, familial neurodegenerative diseases emerge during the fifth decade of life, whereas sporadic cases do not exhibit symptoms earlier than the seventh decade. Recently, mechanistic links between the aging process and toxic protein aggregation, a common hallmark of neurodegenerative diseases, have been revealed. The insulin/insulin-like growth factor 1 (IGF1) signalling pathway - a lifespan, metabolism and stress-resistance regulator - links neurodegeneration to the aging process. Thus, although a reduction of insulin signalling can result in diabetes, its reduction can also increase longevity and delay the onset of protein-aggregation-mediated toxicity. Here we review this apparent paradox and delineate the therapeutic potential of manipulating the insulin/IGF1 signalling pathway for the treatment of neurodegenerative diseases.

Original languageAmerican English
Pages (from-to)759-767
Number of pages9
JournalNature Reviews Neuroscience
Issue number10
StatePublished - Oct 2008
Externally publishedYes


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