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MAP2K4 interacts with Vimentin to activate the PI3K/AKT pathway and promotes breast cancer pathogenesis

Shu Liu1,2, Juan Huang1, Yewei Zhang3

  • 1Southern Medical University, Nanfang Hospital, Department of Oncology, Guangzhou 510515, Guangdong, P. R. China.

Aging
|November 26, 2019
PubMed

Insights

Mitogen-activated protein kinase kinase 4 (MAP2K4) acts as an oncogene in breast cancer. Overexpressed MAP2K4 drives cancer progression by activating PI3K/AKT signaling and promoting cell migration and invasion.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Signaling

Background:

  • Mitogen-activated protein kinase kinase 4 (MAP2K4) is part of the MAPK activator family, crucial for cell functions.
  • The specific role of MAP2K4 in breast cancer progression remains unclear.
  • Understanding MAP2K4's mechanism is vital for identifying new therapeutic targets.

Purpose of the Study:

  • To elucidate the function and mechanism of MAP2K4 in breast cancer.
  • To investigate the impact of MAP2K4 on cancer cell proliferation, migration, and invasion.
  • To determine the prognostic significance of MAP2K4 and Vimentin in breast cancer patients.

Main Methods:

  • Investigated MAP2K4 overexpression and knockdown effects on breast cancer cells in vitro and in vivo.
  • Analyzed downstream signaling pathways including PI3K/AKT, c-JUN, cell cycle, and EMT.
  • Assessed the interaction between MAP2K4 and Vimentin.
  • Correlated MAP2K4 and Vimentin expression levels with patient survival data.

Main Results:

  • Overexpression of MAP2K4 significantly increased breast cancer cell proliferation, migration, and invasion.
  • MAP2K4 knockdown reversed these oncogenic effects.
  • MAP2K4 activated PI3K/AKT signaling, promoted G1/S cell cycle transition, and induced EMT.
  • MAP2K4 interacted with Vimentin, exacerbating the malignant phenotype.
  • High co-expression of MAP2K4 and Vimentin correlated with poorer patient survival.

Conclusions:

  • MAP2K4 functions as an oncogene in breast cancer.
  • MAP2K4 promotes tumor progression via PI3K/AKT pathway activation, cell cycle regulation, EMT induction, and Vimentin interaction.
  • Co-expression of MAP2K4 and Vimentin is a significant unfavorable prognostic factor in breast cancer.
Keywords:
MAP2K4PI3K/AKT pathwayVimentinbreast cancer

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