A TORC1-histone axis regulates chromatin organisation and non-canonical induction of autophagy to ameliorate ageing

eLife

Richard A Miller¹  Jennifer C Regan²  Sebastian Grönke³  Yu-Xuan Lu³  Julia Stinn³  Oliver Hahn³  Jacqueline Eßer³  Lisa F Drews³  Thomas Weinseis³  Linda Partridge⁴ 

[1] Department of Pathology, University of Michigan, Ann Arbor, United States;Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, London, United Kingdom;Max Planck Institute for Biology of Ageing, Cologne, Germany;Max Planck Institute for Biology of Ageing, Cologne, Germany;Institute of Healthy Ageing, Department of Genetics, Evolution and Environment, University College London, London, United Kingdom;

关键词: histone;    lifespan;    autophagy;    mTOR;    ageing;    intestine;    D. melanogaster;    Mouse;   

DOI  :  10.7554/eLife.62233

来源: eLife Sciences Publications, Ltd

【 摘 要 】

Age-related changes to histone levels are seen in many species. However, it is unclear whether changes to histone expression could be exploited to ameliorate the effects of ageing in multicellular organisms. Here we show that inhibition of mTORC1 by the lifespan-extending drug rapamycin increases expression of histones H3 and H4 post-transcriptionally through eIF3-mediated translation. Elevated expression of H3/H4 in intestinal enterocytes in Drosophila alters chromatin organisation, induces intestinal autophagy through transcriptional regulation, and prevents age-related decline in the intestine. Importantly, it also mediates rapamycin-induced longevity and intestinal health. Histones H3/H4 regulate expression of an autophagy cargo adaptor Bchs (WDFY3 in mammals), increased expression of which in enterocytes mediates increased H3/H4-dependent healthy longevity. In mice, rapamycin treatment increases expression of histone proteins and Wdfy3 transcription, and alters chromatin organisation in the small intestine, suggesting that the mTORC1-histone axis is at least partially conserved in mammals and may offer new targets for anti-ageing interventions.

【 授权许可】

CC BY