Piezo1 channel exaggerates ferroptosis of nucleus pulposus cells by mediating mechanical stress-induced iron influx
Ziqian Xiang , Pengfei Zhang , Chunwang Jia , Rongkun Xu , Dingren Cao , Zhaoning Xu , Tingting Lu , Jingwei Liu , Xiaoxiong Wang , Cheng Qiu , Wenyang Fu , Weiwei Li , Lei Cheng , Qiang Yang , Shiqing Feng , Lianlei Wang , Yunpeng Zhao , Xinyu Liu
Bone Research ›› 2024, Vol. 12 ›› Issue (1) : 20
To date, several molecules have been found to facilitate iron influx, while the types of iron influx channels remain to be elucidated. Here, Piezo1 channel was identified as a key iron transporter in response to mechanical stress. Piezo1-mediated iron overload disturbed iron metabolism and exaggerated ferroptosis in nucleus pulposus cells (NPCs). Importantly, Piezo1-induced iron influx was independent of the transferrin receptor (TFRC), a well-recognized iron gatekeeper. Furthermore, pharmacological inactivation of Piezo1 profoundly reduced iron accumulation, alleviated mitochondrial ROS, and suppressed ferroptotic alterations in stimulation of mechanical stress. Moreover, conditional knockout of Piezo1 (Col2a1-CreERT Piezo1 flox/flox) attenuated the mechanical injury-induced intervertebral disc degeneration (IVDD). Notably, the protective effect of Piezo1 deficiency in IVDD was dampened in Piezo1/Gpx4 conditional double knockout (cDKO) mice (Col2a1-CreERT Piezo1 flox/flox /Gpx4 flox/flox). These findings suggest that Piezo1 is a potential determinant of iron influx, indicating that the Piezo1-iron-ferroptosis axis might shed light on the treatment of mechanical stress-induced diseases.
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National Natural Science Foundation of China (National Science Foundation of China)(81874022)
Key R&D Project of Shandong Province (2022CXGC010503)
Natural Science Foundation of Shandong Province (Shandong Provincial Natural Science Foundation)(ZR202102210113)
Taishan Scholar Project of Shandong Province(tsqn202211317)
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