Advanced Science (May 2024)

Urolithin A Hijacks ERK1/2‐ULK1 Cascade to Improve CD8+ T Cell Fitness for Antitumor Immunity

  • Shuaiya Ma,
  • Qi Wu,
  • Wenxian Wu,
  • Ye Tian,
  • Jie Zhang,
  • Chaojia Chen,
  • Xue Sheng,
  • Fangcheng Zhao,
  • Lu Ding,
  • Taixia Wang,
  • Laixi Zhao,
  • Yuying Xie,
  • Yongxiang Wang,
  • Xuetian Yue,
  • Zhuanchang Wu,
  • Jian Wei,
  • Kun Zhang,
  • Xiaohong Liang,
  • Lifen Gao,
  • Hongyan Wang,
  • Guihua Wang,
  • Chunyang Li,
  • Chunhong Ma

DOI
https://doi.org/10.1002/advs.202310065
Journal volume & issue
Vol. 11, no. 18
pp. n/a – n/a

Abstract

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Abstract According to the latest evidence, the microbial metabolite Urolithin A (UA), known for its role in promoting cellular health, modulates CD8+ T cell‐mediated antitumor activity. However, the direct target protein of UA and its underlying mechanism remains unclear. Here, this research identifies ERK1/2 as the specific target crucial for UA‐mediated CD8+ T cell activation. Even at low doses, UA markedly enhances the persistence and effector functions of primary CD8+ cytotoxic T lymphocytes (CTLs) and human chimeric antigen receptor (CAR) T cells both in vitro and in vivo. Mechanistically, UA interacts directly with ERK1/2 kinases, enhancing their activation and subsequently facilitating T cell activation by engaging ULK1. The UA‐ERK1/2‐ULK1 axis promotes autophagic flux in CD8+ CTLs, enhancing cellular metabolism and maintaining reactive oxygen species (ROS) levels, as evidenced by increased oxygen consumption and extracellular acidification rates. UA‐treated CD8+ CTLs also display elevated ATP levels and enhanced spare respiratory capacity. Overall, UA activates ERK1/2, inducing autophagy and metabolic adaptation, showcasing its potential in tumor immunotherapy and interventions for diseases involving ERKs.

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