mTOR regulates MAPKAPK2 translation to control the senescence-associated secretory phenotype

Nicolas Herranz, Suchira Gallage, Massimiliano Mellone, Torsten Wuestefeld, Sabrina Klotz, Christopher J. Hanley, Selina Raguz, Juan Carlos Acosta, Andrew J. Innes, Ana Banito, Athena Georgilis, Alex Montoya, Katharina Wolter, Gopuraja Dharmalingam, Peter Faull, Thomas Carroll, Juan Pedro Martinez-Barbera, Pedro Cutillas, Florian Reisinger, Mathias HeikenwalderRichard A. Miller, Dominic Withers, Lars Zender, Gareth J. Thomas, Jesus Gil

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Senescent cells secrete a combination of factors collectively known as the senescence-associated secretory phenotype (SASP). The SASP reinforces senescence and activates an immune surveillance response, but it can also show pro-tumorigenic properties and contribute to age-related pathologies. In a drug screen to find new SASP regulators, we uncovered the mTOR inhibitor rapamycin as a potent SASP suppressor. Here we report a mechanism by which mTOR controls the SASP by differentially regulating the translation of the MK2 (also known as MAPKAPK2) kinase through 4EBP1. In turn, MAPKAPK2 phosphorylates the RNA-binding protein ZFP36L1 during senescence, inhibiting its ability to degrade the transcripts of numerous SASP components. Consequently, mTOR inhibition or constitutive activation of ZFP36L1 impairs the non-cell-autonomous effects of senescent cells in both tumour-suppressive and tumour-promoting contexts. Altogether, our results place regulation of the SASP as a key mechanism by which mTOR could influence cancer, age-related diseases and immune responses.
Original languageEnglish
Pages (from-to)1205-1217
Number of pages13
JournalNature Cell Biology
Volume17
Issue number9
Early online date17 Aug 2015
DOIs
Publication statusPublished - Sept 2015

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