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CIDE-3 interacts with lipopolysaccharide-induced tumor necrosis factor, and overexpression increases apoptosis in

Jie Min1, Wei Zhang, Yu Gu

  • 1State Key Laboratory Of Cancer Biology, Department of pathology, Xijing Hospital, The Fourth Military Medical University, 710032 Xi'an, China.

Medical Oncology (Northwood, London, England)
|October 20, 2010
PubMed

Insights

Cell death-inducing DFF45-like effector-3 (CIDE-3) suppresses hepatocellular carcinoma (HCC) by inducing apoptosis and inhibiting proliferation. This study reveals CIDE-3

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Death Research

Background:

  • Cell death-inducing DFF45-like effector-3 (CIDE-3) is a novel protein in the apoptosis-inducing family with an unknown function.
  • CIDE-3 exhibits differential expression in hepatocellular carcinoma (HCC) tissues compared to normal adjacent tissues, suggesting a role in HCC pathogenesis.

Purpose of the Study:

  • To investigate the function of CIDE-3 in hepatocellular carcinoma (HCC) and test the hypothesis that it induces apoptosis, thereby inhibiting oncogenesis and tumor development.

Main Methods:

  • Immunohistochemistry was used to assess CIDE-3 expression in 82 HCC and 51 adjacent liver tissue samples.
  • Flow cytometry was employed to detect apoptosis in SMMC-7721 HCC cells with and without CIDE-3 overexpression.
  • A yeast two-hybrid system was utilized to identify CIDE-3 interacting proteins.

Main Results:

  • CIDE-3 expression was significantly decreased in HCC tissues compared to normal adjacent tissues.
  • CIDE-3 expression positively correlated with HCC differentiation, being lower in poorly differentiated tumors.
  • Overexpression of CIDE-3 in SMMC-7721 cells induced apoptosis and inhibited cell proliferation.
  • The interaction between CIDE-3 and lipopolysaccharide-induced tumor necrosis factor (LITAF) was identified in hepatic cells.

Conclusions:

  • CIDE-3 plays a crucial role in inducing apoptosis and inhibiting proliferation in hepatocellular carcinoma cells.
  • The decreased expression of CIDE-3 in HCC tissues suggests it acts as a tumor suppressor.
  • This study demonstrates the novel interaction between CIDE-3 and LITAF, providing new insights into HCC apoptosis pathways.

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