Stimulating TRPM7 suppresses cancer cell proliferation and metastasis by inhibiting autophagy

Yanhong Xing, Xiangqing Wei, Meng meng Wang, Yucheng Liu, Zhongheng Sui, Xinyan Wang, Yang Zhang, Yuan hui Fei, Yi Jiang, Chen Lu, Peng Zhang, Rong Chen, Nan Liu, Mengmei Wu, Lin Ding, Yuqing Wang, Feng Guo, Jun li Cao, Jiansong Qi, Wuyang Wang

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The transient receptor potential melastatin-subfamily member 7 (TRPM7) is a ubiquitous cation channel possessing kinase activity. TRPM7 mediates a variety of physiological responses by conducting flow of cations such as Ca2+, Mg2+, and Zn2+. Here, we show that the activation of TRPM7 channel stimulated by chemical agonists of TRPM7, Clozapine or Naltriben, inhibited autophagy via mediating Zn2+ release to the cytosol, presumably from the intracellular Zn2+-accumulating vesicles where TRPM7 localizes. Zn2+ release following the activation of TRPM7 disrupted the fusion between autophagosomes and lysosomes by disturbing the interaction between Sxt17 and VAMP8 which determines fusion status of autophagosomes and lysosomes. Ultimately, the disrupted fusion resulting from stimulation of TRPM7 channels arrested autophagy. Functionally, we demonstrate that the autophagy inhibition mediated by TRPM7 triggered cell death and suppressed metastasis of cancer cells in vitro, more importantly, restricted tumor growth and metastasis in vivo, by evoking apoptosis, cell cycle arrest, and reactive oxygen species (ROS) elevation. These findings represent a strategy for stimulating TRPM7 to combat cancer.

Original languageEnglish
Pages (from-to)179-197
Number of pages19
JournalCancer Letters
Volume525
DOIs
Publication statusPublished - Jan 28 2022

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research

Fingerprint

Dive into the research topics of 'Stimulating TRPM7 suppresses cancer cell proliferation and metastasis by inhibiting autophagy'. Together they form a unique fingerprint.

Cite this