MCUR1 facilitates epithelial-mesenchymal transition and metastasis via the mitochondrial calcium dependent ROS/Nrf2/Notch pathway in hepatocellular carcinoma

作者：Mingpeng Jin, Jiaojiao Wang, Xiaoying Ji, Haiyan Cao, Jianjun Zhu, Yibing Chen, Yang Jin, Zheng Zhao, Tingting Ren, Jinliang Xing · 发表于：Journal of Experimental & Clinical Cancer Research · 年份：2019 · DOI：10.1186/s13046-019-1135-x · 被引用次数：170 · 研究领域：Mitochondrial Function and Pathology、GDF15 and Related Biomarkers、Genomics, phytochemicals, and oxidative stress

Mitochondrial Ca 2+ plays a critical role in tumorigenesis, including cell proliferation and metastasis. Mitochondrial calcium uniporter regulator 1 (MCUR1) has been shown to be frequently upregulated in HCC and promote cancer cell survival. However, whether MCUR1 is involved in the metastasis of HCC and its underlying mechanisms remain unknown. The effect of MCUR1 expression on epithelial-mesenchymal transition (EMT) in HCC cells was first evaluated by immunofluorescent staining and Western blot. Then, in vitro invasion and in vivo metastasis assays were used to evaluate the function of MCUR1 in HCC metastasis. The underlying mechanism has also been explored by investigating the effect of MCUR1 on ROS/Nrf2/Notch1 pathway. MCUR1 expression was significantly higher in HCC with metastasis and associated with tumor progression. MCUR1 promoted in vitro invasion and in vivo metastasis of HCC cells by promoting EMT via Snail. Mechanistically, MCUR1-mediated mitochondrial Ca 2+ signaling promoted the EMT of HCC cells by activating ROS/Nrf2/Notch1 pathway. Inhibition of ROS production, mitochondrial Ca 2+ uptake, Nrf2 expression or Notch1 activity significantly suppressed MCUR1-induced EMT of HCC cells. In addition, treatment with the mitochondrial Ca 2+ -buffering protein parvalbumin significantly inhibited ROS/Nrf2/Notch pathway and MCUR1-induced EMT and HCC metastasis. Our study provides evidence supporting a metastasis-promoting role for MCUR1-dependent mitochondrial Ca 2+ uptake...