Macrophage migration inhibitory factor induces autophagy via reactive oxygen species generation

Yung Chun Chuang, Wen Hong Su, Huan Yao Lei, Yee Shin Lin, Hsiao Sheng Liu, Chih Peng Chang, Trai Ming Yeh

研究成果: Article同行評審

58 引文 斯高帕斯(Scopus)

摘要

Autophagy is an evolutionarily conserved catabolic process that maintains cellular homeostasis under stress conditions such as starvation and pathogen infection. Macrophage migration inhibitory factor (MIF) is a multifunctional cytokine that plays important roles in inflammation and tumorigenesis. Cytokines such as IL-1β and TNF-α that are induced by MIF have been shown to be involved in the induction of autophagy. However, the actual role of MIF in autophagy remains unclear. Here, we have demonstrated that incubation of human hepatoma cell line HuH-7 cells with recombinant MIF (rMIF) induced reactive oxygen species (ROS) production and autophagy formation, including LC3-II expression, LC3 punctae formation, autophagic flux, and mitochondria membrane potential loss. The autophagy induced by rMIF was inhibited in the presence of MIF inhibitor, ISO-1 as well as ROS scavenger N-acetyl-L-cysteine (NAC). In addition, serum starvation-induced MIF release and autophagy of HuH-7 cells were partly blocked in the presence of NAC. Moreover, diminished MIF expression by shRNA transfection or inhibition of MIF by ISO-1 decreased serum starvation-induced autophagy of HuH-7 cells. Taken together, these data suggest that cell autophagy was induced by MIF under stress conditions such as inflammation and starvation through ROS generation.

原文English
文章編號e37613
期刊PloS one
7
發行號5
DOIs
出版狀態Published - 2012 5月 22

All Science Journal Classification (ASJC) codes

  • 一般生物化學,遺傳學和分子生物學
  • 一般農業與生物科學
  • 多學科

指紋

深入研究「Macrophage migration inhibitory factor induces autophagy via reactive oxygen species generation」主題。共同形成了獨特的指紋。

引用此