Open Close
Reference
Citation
Gupta, V.K., Scheunemann, L., Eisenberg, T., Mertel, S., Bhukel, A., Koemans, T.S., Kramer, J.M., Liu, K.S., Schroeder, S., Stunnenberg, H.G., Sinner, F., Magnes, C., Pieber, T.R., Dipt, S., Fiala, A., Schenck, A., Schwaerzel, M., Madeo, F., Sigrist, S.J. (2013). Restoring polyamines protects from age-induced memory impairment in an autophagy-dependent manner.  Nat. Neurosci. 16(10): 1453--1460.
FlyBase ID
FBrf0222795
Publication Type
Research paper
Abstract

Age-dependent memory impairment is known to occur in several organisms, including Drosophila, mouse and human. However, the fundamental cellular mechanisms that underlie these impairments are still poorly understood, effectively hampering the development of pharmacological strategies to treat the condition. Polyamines are among the substances found to decrease with age in the human brain. We found that levels of polyamines (spermidine, putrescine) decreased in aging fruit flies, concomitant with declining memory abilities. Simple spermidine feeding not only restored juvenile polyamine levels, but also suppressed age-induced memory impairment. Ornithine decarboxylase-1, the rate-limiting enzyme for de novo polyamine synthesis, also protected olfactory memories in aged flies when expressed specifically in Kenyon cells, which are crucial for olfactory memory formation. Spermidine-fed flies showed enhanced autophagy (a form of cellular self-digestion), and genetic deficits in the autophagic machinery prevented spermidine-mediated rescue of memory impairments. Our findings indicate that autophagy is critical for suppression of memory impairments by spermidine and that polyamines, which are endogenously present, are candidates for pharmacological intervention.

PubMed ID
PubMed Central ID
Related Publication(s)
Note

Spermidine-triggered autophagy ameliorates memory during aging.
Sigrist et al., 2014, Autophagy 10(1): 178--179 [FBrf0223745]

Associated Information
Comments
Associated Files
Other Information
Secondary IDs
    Language of Publication
    English
    Additional Languages of Abstract
    Parent Publication
    Publication Type
    Journal
    Abbreviation
    Nat. Neurosci.
    Title
    Nature Neuroscience
    Publication Year
    1998-
    ISBN/ISSN
    1097-6256
    Data From Reference
    Aberrations (1)
    Alleles (7)
    Genes (7)
    Natural transposons (1)
    Insertions (1)
    Experimental Tools (1)
    Transgenic Constructs (3)