Work

Correction: A Novel Role for the SMG-1 Kinase in Lifespan and Oxidative Stress Resistance in Caenorhabditis elegans

Year: 2009

Type: erratum

Abstract: The PTEN tumour suppressor encodes a phosphatase, and its daf-18 orthologue in Caenorhabditis elegans negatively regulates the insulin/IGF-1 DAF-2 receptor pathway that influences lifespan in worms and other species.In order to identify new DAF-18 regulated pathways involved in aging, we initiated a candidate RNAi feeding screen for clones that lengthen lifespan.Here, we report that smg-1 inactivation increases average lifespan in a daf-18 dependent manner.Genetic analysis is consistent with SMG-1 acting at least in part in parallel to the canonical DAF-2 receptor pathway, but converging on the transcription factor DAF-16/FOXO.SMG-1 is a serine-threonine kinase which plays a conserved role in nonsense-mediated mRNA decay (NMD) in worms and mammals.In addition, human SMG-1 has also been implicated in the p53-mediated response to genotoxic stress.The effect of smg-1 inactivation on lifespan appears to be unrelated to its NMD function, but requires the p53 tumour suppressor orthologue cep-1.Furthermore, smg-1 inactivation confers a resistance to oxidative stress in a daf-18-, daf-16-and cep-1-dependent manner.We propose that the role of SMG-1 in lifespan regulation is at least partly dependent on its function in oxidative stress resistance.Taken together, our results unveil a novel role for SMG-1 in lifespan regulation.

Source: PLoS ONE

DOI: 10.1371/annotation/8b010ad6-34d5-45fc-9bc2-c82a7370ebc7