Expression of the gadd153 gene in normal and tumor breast tissues by a sensitive RT-PCR method.
The gadd153 gene belongs to the CCAAT/enhancer binding protein (C/EBP) family of transcription factors. The role of these proteins in the control of proliferation and differentiation have mostly been studied in vitro. The involvement of gadd153 gene expression in human disease, and most particularly in breast cancer, is largely unknown. Since gadd153 gene is normally expressed at very low levels in most cells, we developed a sensitive reverse transcriptase-polymerase chain reaction (RT-PCR) technique that permits the detection of low amounts of RNA. In these conditions, 24 breast tumors and 14 corresponding normal samples were analysed, and levels of expression between tumor and normal tissues were compared. Statistical analysis indicated a significant induction of gadd153 gene expression in tumor samples in comparison to normal ones (p<0. 01). Thus, overexpression of gadd153 may inhibit the cellular differentiation process and facilitate breast tumorigenesis. Further studies are needed with larger number of cases to determine the specific prognostic role of gadd153 in breast cancer.
Arnal
M
M
Laboratory of Molecular Genetics, INSERM U517, Centre Georges-Fran ois Leclerc, 21034 Dijon Cedex, France.
Solary
E
E
Brunet-Lecomte
P
P
Lizard-Nacol
S
S
D014408:Biomarkers, Tumor / Q000378:metabolism*; D001940:Breast / Q000378:metabolism*; D001943:Breast Neoplasms / Q000235:genetics* / Q000378:metabolism*; D022762:CCAAT-Enhancer-Binding Proteins; D018076:DNA, Complementary / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000378:metabolism*; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods*; D051742:Transcription Factor CHOP; D014157:Transcription Factors / Q000378:metabolism*; D014407:Tumor Cells, Cultured
D014408:Biomarkers, Tumor; D022762:CCAAT-Enhancer-Binding Proteins; C497249:DDIT3 protein, human; D018076:DNA, Complementary; D004268:DNA-Binding Proteins; D014157:Transcription Factors; D051742:Transcription Factor CHOP