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RGC32 induces epithelial-mesenchymal transition by activating the Smad/Sip1 signaling pathway in CRC

Xiao-Yan Wang1,2, Sheng-Nan Li1,2, Hui-Fang Zhu1,2

  • 1Department of Pathology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.

Scientific Reports
|May 5, 2017
PubMed

Insights

Response gene to complement 32 (RGC32) is upregulated in colorectal cancer (CRC), promoting tumor growth and spread. RGC32 facilitates epithelial-mesenchymal transition (EMT) in CRC via the Smad/Sip1 pathway, indicating its role in cancer progression.

Area of Science:

  • Molecular Biology
  • Oncology
  • Cell Biology

Background:

  • Response gene to complement 32 (RGC32) is a transcription factor regulating cell growth, viability, and differentiation.
  • The role of RGC32 in colorectal cancer (CRC) tumorigenesis and progression requires further investigation.

Purpose of the Study:

  • To elucidate the role of RGC32 in the development and progression of colorectal cancer.
  • To investigate the correlation between RGC32 expression and clinicopathological features and patient survival in CRC.

Main Methods:

  • Analysis of RGC32 expression in human CRC tissues and adjacent normal tissues.
  • In vitro and in vivo studies to assess the effects of RGC32 overexpression on CRC cell proliferation, migration, and tumorigenic growth.
  • Investigation of the underlying molecular mechanisms, including the Smad/Sip1 signaling pathway and epithelial-mesenchymal transition (EMT) markers.

Main Results:

  • RGC32 expression was significantly upregulated in CRC tissues compared to normal tissues.
  • RGC32 expression correlated with invasive and aggressive tumor characteristics and predicted poor patient survival.
  • RGC32 overexpression enhanced CRC cell proliferation, migration, and in vivo tumor growth.
  • RGC32 facilitated EMT in CRC by decreasing E-cadherin and increasing vimentin expression via the Smad/Sip1 pathway.

Conclusions:

  • Overexpression of RGC32 is a significant factor in colorectal cancer progression.
  • RGC32 promotes CRC tumorigenesis and metastasis by facilitating epithelial-mesenchymal transition (EMT).
  • Targeting RGC32 or the Smad/Sip1 pathway may offer therapeutic strategies for CRC.

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