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TLE4 promotes colorectal cancer progression through activation of JNK/c-Jun signaling pathway

Shu-Yang Wang1,2,3, Ke Gao1,2,3,4, Dan-Ling Deng1,2,3

  • 1Department of Pathology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.

Oncotarget
|December 25, 2015
PubMed

Insights

The TLE4 protein promotes colorectal cancer (CRC) growth and spread, contrary to its tumor suppressor role in leukemia. High TLE4 expression correlates with advanced CRC, indicating its potential as a prognostic biomarker.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • The transcriptional co-repressor TLE4 is a known tumor suppressor in acute myeloid leukemia.
  • Its role in solid tumor development and progression, particularly colorectal cancer (CRC), remains largely unknown.

Purpose of the Study:

  • To investigate the role of TLE4 in the development and progression of colorectal cancer.
  • To determine TLE4's potential as a prognostic biomarker in CRC.

Main Methods:

  • Quantitative analysis of TLE4 expression in CRC tissues versus adjacent normal tissues.
  • Correlation analysis between TLE4 expression levels and clinical parameters (Dukes stage, lymph node metastasis, prognosis).
  • In vitro and in vivo studies involving TLE4 overexpression and knockdown in CRC cell lines.
  • Investigation of the molecular pathways affected by TLE4, including the JNK-c-Jun pathway, cyclinD1, and P27Kip1.

Main Results:

  • TLE4 expression is significantly elevated in CRC tissues compared to normal adjacent tissues.
  • High TLE4 expression is associated with advanced Dukes stage, lymph node metastasis, and poorer patient prognosis.
  • Enforced TLE4 expression enhances CRC cell proliferation, invasion, and tumor growth, while TLE4 knockdown inhibits these processes.
  • TLE4 promotes CRC progression partly by activating the JNK-c-Jun pathway, leading to increased cyclinD1 and decreased P27Kip1 levels.

Conclusions:

  • TLE4 plays a significant role in the development and progression of human colorectal cancer.
  • TLE4 is a potential prognostic biomarker for CRC, with elevated expression indicating a worse outcome.
Keywords:
JNKTLE4c-Juncolorectal cancerproliferation

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