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RNAi-mediated ERBB2 gene knockdown sensitizes human colorectal cancer cells to radiation

Dong-Li Zhao1, Cheng-Xue Dang, Yan-Xia Sui

  • 1Department of Oncology, First Affiliated Hospital, Medical College of Xi'an Jiaotong University, Xi'an 710061, PR China.

Molecular Medicine Reports
|December 28, 2011
PubMed

Insights

The receptor tyrosine kinase ERBB2 (also known as c-erbB-2) is implicated in colorectal cancer progression and metastasis. Targeting ERBB2 may offer a new therapeutic strategy for colorectal cancer patients.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • The receptor tyrosine kinase ERBB2 (c-erbB-2) gene plays a role in various cancers.
  • Its specific involvement in colorectal cancer pathogenesis and metastatic potential requires further investigation.

Purpose of the Study:

  • To investigate the role of ERBB2 in colorectal cancer development and metastasis.
  • To evaluate ERBB2 as a potential therapeutic target for colorectal cancer.

Main Methods:

  • Immunohistochemical and histopathological analyses of 80 colorectal cancer patient samples.
  • ERBB2 knockdown in HT29 cells using small hairpin RNA (shRNA).
  • Validation of knockdown via RT-PCR and western blotting; cell cycle and apoptosis assays.

Main Results:

  • A significant correlation was found between ERBB2 levels and Dukes' stage in primary and metastatic colorectal cancer tissues.
  • ERBB2-depleted cells showed increased sensitivity to radiation, linked to G0/G1 cell cycle arrest and apoptosis.
  • ERBB2 overexpression is associated with colorectal cancer malignancy and metastasis.

Conclusions:

  • ERBB2 is implicated in the progression and metastasis of colorectal cancer.
  • Overexpressed ERBB2 represents a potential therapeutic target for colorectal cancer treatment.
Keywords:
ERBB2RNA interferencecolorectal cancerradiation

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