PMID: 26318988Sep 1, 2015Paper

Knockdown of Indy/CeNac2 extends Caenorhabditis elegans life span by inducing AMPK/aak-2

Aging
Franziska SchwarzAndreas L Birkenfeld

Abstract

Reducing the expression of the Indy (Acronym for 'I'm Not Dead, Yet') gene in lower organisms promotes longevity and leads to a phenotype that resembles various aspects of caloric restriction. In C. elegans, the available data on life span extension is controversial. Therefore, the aim of this study was to determine the role of the C. elegans INDY homolog CeNAC2 in life span regulation and to delineate possible molecular mechanisms. siRNA against Indy/CeNAC2 was used to reduce expression of Indy/CeNAC2. Mean life span was assessed in four independent experiments, as well as whole body fat content and AMPK activation. Moreover, the effect of Indy/CeNAC2 knockdown in C. elegans with inactivating variants of AMPK (TG38) was studied. Knockdown of Indy/CeNAC2 increased life span by 22±3 % compared to control siRNA treated C. elegans, together with a decrease in whole body fat content by ~50%. Indy/CeNAC2 reduction also increased the activation of the intracellular energy sensor AMPK/aak2. In worms without functional AMPK/aak2, life span was not extended when Indy/CeNAC2 was reduced. Inhibition of glycolysis with deoxyglucose, an intervention known to increase AMPK/aak2 activity and life span, did not promote longevity when Indy/CeNA...Continue Reading

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Citations

Jun 10, 2017·Frontiers in Genetics·Blanka Rogina
Dec 29, 2019·Pharmacological Reviews·Tina SchumannAndreas L Birkenfeld
Jan 31, 2017·Hepatology : Official Journal of the American Association for the Study of Liver Diseases·Christian von LoeffelholzAndreas L Birkenfeld
Dec 1, 2021·Rejuvenation Research·Andrew R Mendelsohn, James Larrick

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