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WT1 is involved in the Akt-JNK pathway dependent autophagy through directly regulating Gas1 expression in human

Hao Mo1, Juliang He1, Zhenchao Yuan1

  • 1Department of Bone and Soft Tissue Neurosurgery, Affiliated Tumor Hospital of Guangxi Medical University, People's Republic of China.

Biochemical and Biophysical Research Communications
|July 26, 2016
PubMed

Insights

Wilm's tumor suppressor 1 (WT1) promotes autophagy in osteosarcoma cells by regulating the Akt/JNK pathway and Gas1 expression. This finding clarifies WT1's role in cancer and suggests new therapeutic targets for osteosarcoma.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cellular Biology

Background:

  • Macroautophagy (autophagy) is a protective mechanism in cancer development under metabolic stress.
  • Wilm's tumor suppressor 1 (WT1) is a transcription factor implicated in various cancers, but its role in tumor autophagy is unclear.
  • Osteosarcoma (OS) is a primary bone cancer with complex genetic underpinnings.

Purpose of the Study:

  • To investigate the role of WT1 in autophagy within osteosarcoma cells.
  • To elucidate the signaling pathways and molecular mechanisms by which WT1 influences autophagy.
  • To determine the relationship between WT1 expression and autophagy activity in OS.

Main Methods:

  • Correlation analysis of WT1 expression and autophagy markers in human osteosarcoma cells.
  • Investigation of the Akt/JNK signaling pathway's involvement in WT1-induced autophagy.
  • Analysis of WT1's regulation of growth arrest-specific 1 (Gas1) transcription and its impact on autophagy.

Main Results:

  • High WT1 expression positively correlates with active autophagy in osteosarcoma cells.
  • The Akt/JNK pathway is identified as a positive regulator of WT1-induced autophagy.
  • WT1 controls autophagy by regulating Gas1 expression; WT1 is essential for Gas1 transcription, and Gas1 upregulation follows WT1 overexpression.

Conclusions:

  • WT1 plays a significant role in promoting autophagy in osteosarcoma.
  • WT1 modulates the Akt/JNK pathway and regulates Gas1 expression to induce autophagy.
  • Understanding the WT1-Gas1-autophagy axis offers potential therapeutic strategies for osteosarcoma.
Keywords:
AutophagyGas1JNK pathwayOsteosarcoma cellsWT1

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