Uncoupling the trade-off between somatic proteostasis and reproduction in caenorhabditis elegans models of polyglutamine diseases

Netta Shemesh, Nadav Shai, Lana Meshnik, Rotem Katalan, Anat Ben-Zvi

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Caenorhabditis elegans somatic protein homeostasis (proteostasis) is actively remodeled at the onset of reproduction. This proteostatic collapse is regulated cell-nonautonomously by signals from the reproductive system that transmit the commitment to reproduction to somatic cells. Here, we asked whether the link between the reproductive system and somatic proteostasis could be uncoupled by activating downstream effectors in the gonadal longevity cascade. Specifically, we examined whether over-expression of lipl-4 (lipl-4(oe)), a target gene of the gonadal longevity pathway, or increase in arachidonic acid (AA) levels, associated with lipl-4(oe), modulated proteostasis and reproduction. We found that lipl-4(oe) rescued somatic proteostasis and postponed the onset of aggregation and toxicity in C. elegans models of polyglutamine (polyQ) diseases. However, lipl-4(oe) also disrupted fatty acid transport into developing oocytes and reduced reproductive success. In contrast, diet supplementation of AA recapitulated lipl-4(oe)-mediated proteostasis enhancement in wild type animals but did not affect the reproductive system. Thus, the gonadal longevity pathway mediates a trade-off between somatic maintenance and reproduction, in part by regulating the expression of genes, such as lipl-4, with inverse effects on somatic maintenance and reproduction. We propose that AA could uncouple such germline to soma crosstalk, with beneficial implications protein misfolding diseases.

Original languageEnglish
Article number101
JournalFrontiers in Molecular Neuroscience
Volume10
DOIs
StatePublished - 20 Apr 2017

Keywords

  • Aging
  • Arachidonic acid (AA)
  • Caenorhabditis elegans
  • Lipl-4
  • Neurodegenerative diseases
  • Polyglutamine (polyQ) diseases
  • Proteostasis
  • Reproduction

ASJC Scopus subject areas

  • Molecular Biology
  • Cellular and Molecular Neuroscience

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