Unknown

Dataset Information

0

Modulating p38 MAPK signaling by proteostasis mechanisms supports tissue integrity during growth and aging.


ABSTRACT: The conserved p38 MAPK family is activated by phosphorylation during stress responses and inactivated by phosphatases. C. elegans PMK-1 p38 MAPK initiates innate immune responses and blocks development when hyperactivated. Here we show that PMK-1 signaling is enhanced during early aging by modulating the stoichiometry of non-phospho-PMK-1 to promote tissue integrity and longevity. Loss of pmk-1 function accelerates progressive declines in neuronal integrity and lysosome function compromising longevity which has both cell autonomous and cell non-autonomous contributions. CED-3 caspase cleavage limits phosphorylated PMK-1. Enhancing p38 signaling with caspase cleavage-resistant PMK-1 protects lysosomal and neuronal integrity extending a youthful phase. PMK-1 works through a complex transcriptional program to regulate lysosome formation. During early aging, the absolute phospho-p38 amount is maintained but the reservoir of non-phospho-p38 diminishes to enhance signaling without hyperactivation. Our findings show that modulating the stoichiometry of non-phospho-p38 dynamically supports tissue-homeostasis during aging without hyper-activation of stress response.

SUBMITTER: Yuan W 

PROVIDER: S-EPMC10382525 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature

altmetric image

Publications

Modulating p38 MAPK signaling by proteostasis mechanisms supports tissue integrity during growth and aging.

Yuan Wang W   Weaver Yi M YM   Earnest Svetlana S   Taylor Clinton A CA   Cobb Melanie H MH   Weaver Benjamin P BP  

Nature communications 20230728 1


The conserved p38 MAPK family is activated by phosphorylation during stress responses and inactivated by phosphatases. C. elegans PMK-1 p38 MAPK initiates innate immune responses and blocks development when hyperactivated. Here we show that PMK-1 signaling is enhanced during early aging by modulating the stoichiometry of non-phospho-PMK-1 to promote tissue integrity and longevity. Loss of pmk-1 function accelerates progressive declines in neuronal integrity and lysosome function compromising lon  ...[more]

Similar Datasets

| S-EPMC5442475 | biostudies-literature
| S-EPMC3016890 | biostudies-literature
| S-EPMC4359143 | biostudies-literature
| S-EPMC8431111 | biostudies-literature
| S-EPMC5321575 | biostudies-literature
| S-EPMC2848737 | biostudies-literature
| S-EPMC4599800 | biostudies-literature
| S-EPMC10025507 | biostudies-literature
| S-EPMC10380409 | biostudies-literature
| S-EPMC6940394 | biostudies-literature