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DLC2 operates as a tumor suppressor gene in breast cancer via the RhoGTPase pathway

Zheng Yang1, Hanrui Chen2, Man Shu1

  • 1Department of Pathology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510080, P.R. China.

Oncology Letters
|February 6, 2019
PubMed

Insights

Deleted in liver cancer 2 (DLC2) acts as a tumor suppressor in breast cancer. Lower DLC2 expression correlates with advanced disease and poor prognosis, impacting cell proliferation and invasion via the RhoGTPase pathway.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Deleted in liver cancer 2 (DLC2) is a known tumor suppressor implicated in various cancers.
  • Understanding DLC2's role in breast cancer is crucial for developing targeted therapies and improving patient outcomes.

Purpose of the Study:

  • To investigate DLC2 expression in breast cancer tissues.
  • To determine the clinical significance of DLC2 expression.
  • To evaluate the impact of DLC2 on breast cancer cell behavior.

Main Methods:

  • Immunohistochemistry was used to assess DLC2 expression in 131 breast cancer cases and adjacent normal tissues.
  • Correlation analysis was performed between DLC2 expression and clinicopathological features.
  • DLC2-knockdown breast cancer cell lines were utilized to study effects on proliferation, migration, and invasion.

Main Results:

  • DLC2 was expressed in 42.75% of breast cancer cases, significantly lower than in normal tissues (79.39%).
  • Reduced DLC2 expression was associated with poor tumor differentiation, lymph node metastasis, and unfavorable prognosis (P<0.001).
  • DLC2 gene silencing led to increased cell proliferation, migration, and invasion, linked to altered RhoGTPase pathway signaling.

Conclusions:

  • DLC2 functions as a tumor suppressor in breast cancer development.
  • Downregulation of DLC2 is linked to aggressive tumor characteristics and poor prognosis.
  • DLC2 may serve as a valuable prognostic biomarker for breast cancer patients.
Keywords:
anti-Ras homolog family member Abreast cancerdeleted in liver cancer 2proliferationtumor suppressor

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