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TGF-β1 and TNF-α synergistically induce epithelial to mesenchymal transition of breast cancer cells by enhancing TAK1 activation

  • Sheng-Jun LiaoEmail author
  • Jing Luo
  • Dong Li
  • Yuan-Hong Zhou
  • Bin Yan
  • Jing-Jing Wei
  • Jian-Cheng Tu
  • Yi-Rong Li
  • Gui-Mei Zhang
  • Zuo-Hua FengEmail author
Research Article
  • 12 Downloads

Abstract

TGF-β1 is a main inducer of epithelial to mesenchymal transition (EMT). However, many breast cancer cells are not sensitive to the EMT induction by TGF-β1 alone. So far, the mechanisms underlying the induction of TGF-β1-insensitive breast cancer cells remains unclear. Here we report that TNF-α can induce EMT and invasiveness of breast cancer cells which are insensitive to TGF-β1. Intriguingly, TGF-β1 could cooperate with TNF-α to promote the EMT and invasiveness of breast cancer cells. The prolonged co-stimulation with TGF-β1 and TNF-α could enhance the sustained activation of Smad2/3, p38 MAPK, ERK, JNK and NF-κB pathways by enhancing the activation of TAK1, which was mediated by the gradually up-regulated TβRs. Except for JNK, all of these pathways were required for the effects of TGF-β1 and TNF-α. Importantly, the activation of p38 MAPK and ERK pathways resulted in a positive feed-back effect on TAK1 activation by up-regulating the expression of TβRs, favoring the activation of multiple signaling pathways. Moreover, SLUG was up-regulated and required for the TGF-β1/TNF-α-induced EMT and invasiveness. In addition, SLUG could also enhance the activation of signaling pathways by promoting TβRII expression. These findings suggest that the up-regulation of TβRs contributes to the sustained activation of TAK1 induced by TGF-β1/TNF-α and the following activation of multiple signaling pathways, resulting in EMT and invasiveness of breast cancer cells.

Keywords

TGF-β1 TNF-α TAK1 EMT Invasion 

Abbreviations

EMT

Epithelial to mesenchymal transition

ERK1/2

Extracellular signal-regulated kinase

JNK

C-Jun N-terminal kinase

MAPKs

Mitogen activated protein kinases

NF-κB

Nuclear factor kappa-light-chain-enhancer of activated B cells

TAK1

Transforming growth factor-β activated kinase 1

TGF-β1

Transforming growth factor-β1

TNF-α

Tumor necrosis factor-α

TβRI

Transforming growth factor-β receptor type I

TβRII

Transforming growth factor-β receptor type II

Notes

Acknowledgements

We gratefully thank Prof. Xing-Zhen Chen (Department of Physiology, University of Alberta, Canada) and Dr. Feng-Hua Wu (Department of Physiology, Hubei University of Chinese Medcine, China) for modifying the manuscript and their valuable advice.

Authors’ contributions

SJL and ZHF conceived and designed the experiments; SJL, JL, DL, YHZ, BY and JJW performed the experiment. JCT, YRL and GMZ interpreted and analyzed the data; SJL and ZHF wrote the manuscript. All authors read and approved the final manuscript.

Funding

This work was supported by National Natural Science Foundation of China (No.81472704, 81272314, 30830095), National Development Program (973) For Key Basic Research of China (No. 2009CB521806).

Compliance with ethical standards

Competing interests

The authors declare that they have no competing interests.

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Copyright information

© The International CCN Society 2019

Authors and Affiliations

  1. 1.Department of Clinical LaboratoryZhongnan Hospital of Wuhan UniversityWuhanPeople’s Republic of China
  2. 2.Department of Biochemistry and Molecular Biology, Tongji Medical CollegeHuazhong University of Science & TechnologyWuhanPeople’s Republic of China
  3. 3.The First Affiliated Hospital, Biomedical Translational Research Institute and Guangdong Province Key Laboratory of Molecular Immunology and Antibody EngineeringJinan UniversityGuangzhouPeople’s Republic of China

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