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Krüppel-like factor 9 was down-regulated in esophageal squamous cell carcinoma and negatively regulated

Fan Qiao1, Feng Yao2, Ling Chen1

  • 1Department of Cardiothoracic Surgery, Changhai Hospital, Second Military Medical University, Shanghai, China.

Molecular Carcinogenesis
|February 3, 2015
PubMed

Insights

Krüppel-like factor 9 (KLF9) is down-regulated in esophageal squamous cell carcinoma (ESCC), inhibiting tumor growth and metastasis. KLF9 suppresses beta-catenin/TCF signaling, offering a potential therapeutic target for ESCC.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Krüppel-like factor 9 (KLF9) exhibits tumor-suppressive roles in various cancers.
  • The role of KLF9 in esophageal squamous cell carcinoma (ESCC) remains largely uncharacterized.

Purpose of the Study:

  • To investigate the expression pattern and biological functions of KLF9 in ESCC.
  • To elucidate the underlying molecular mechanisms of KLF9's action in ESCC progression.

Main Methods:

  • Quantitative analysis of KLF9 expression in ESCC tissues versus normal tissues.
  • In vitro and in vivo assays to assess the effects of KLF9 on ESCC cell growth, migration, and metastasis.
  • Mechanistic studies involving KLF9 binding to TCF4 and its impact on the beta-catenin/TCF signaling pathway and Cyr61 expression.

Main Results:

  • KLF9 expression is significantly downregulated in ESCC tissues compared to adjacent normal tissues.
  • Downregulation of KLF9 correlates inversely with clinical features in ESCC patients.
  • KLF9 inhibits ESCC cell proliferation, migration, and metastasis both in vitro and in vivo.
  • KLF9 suppresses the beta-catenin/TCF signaling pathway by interacting with TCF4 and downregulating Cyr61.

Conclusions:

  • KLF9 acts as a tumor suppressor in ESCC.
  • KLF9 negatively regulates ESCC progression by inhibiting the beta-catenin/TCF signaling pathway.
  • KLF9 represents a potential therapeutic target for managing ESCC.
Keywords:
Cyr61ESCCKLF9bet-catenin/TCFcell proliferation and invasion

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