Abstract
Cell death–inducing DFF45-like effector-3 (CIDE-3) is a novel member of an apoptosis-inducing protein family, but its function is unknown. CIDE-3 shows a different distribution pattern in hepatocellular carcinoma (HCC) tissues and normal adjacent tissues. Therefore, this work tested the hypothesis that CIDE-3 induces apoptosis in HCC cells, inhibiting oncogenesis and tumor development. We used immunohistochemistry to evaluate the expression of CIDE-3 in 82 HCC samples and 51 adjacent liver tissues. Overexpression of CIDE-3 induced apoptosis, as detected by flow cytometry, in the HCC cell line SMMC-7721, which had undetectable levels of CIDE-3 in the absence of CIDE-3 overexpression. A yeast two-hybrid system was employed to screen for proteins that interact with CIDE-3. The expression of CIDE-3 was decreased in HCC tissue, compared to adjacent normal tissues, and CIDE-3 expression and HCC differentiation were positively correlated. CIDE-3 expression levels were lower in poorly differentiated HCC tissue than in well-differentiated HCC tissue. Overexpressed CIDE-3 inhibited proliferation and induced apoptosis in HCC cells. We found that lipopolysaccharide-induced tumor necrosis factor (LITAF) interacted with CIDE-3 in hepatic cells. This is the first demonstrated interaction between CIDE-3 and LITAF, and the first report that CIDE-3 induces apoptosis in hepatocellular carcinoma.
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Abbreviations
- CIDE-3:
-
Cell death–inducing DFF45-like effector-3
- LITAF:
-
Lipopolysaccharide-induced tumor necrosis factor
- HCC:
-
Hepatocellular carcinoma
- DFF:
-
DNA fragmentation factor
- CAD:
-
Caspase-activated DNase
- PBS:
-
Phosphate-buffered saline
- DAB:
-
Diaminobenzidine
- PVDF:
-
Polyvinylidene difluoride
- TBS:
-
Tris-buffered saline
- ORF:
-
Open reading frame
- LPS:
-
Lipopolysaccharide
- NO:
-
Nitric oxide
- FISH:
-
Fluorescence in situ hybridization
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Jie Min, Wei Zhang and Yu Gu contributed equally to this work.
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Min, J., Zhang, W., Gu, Y. et al. CIDE-3 interacts with lipopolysaccharide-induced tumor necrosis factor, and overexpression increases apoptosis in hepatocellular carcinoma. Med Oncol 28 (Suppl 1), 219–227 (2011). https://doi.org/10.1007/s12032-010-9702-1
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DOI: https://doi.org/10.1007/s12032-010-9702-1