Identification of S100A2 as a target of the DeltaNp63 oncogenic pathway.
OBJECTIVE
It has been proved recently that DeltaNp63 may play an oncogenic role in the tumorigenic pathway of squamous cell cancers. To gain additional insight into this pathway, we examined global patterns of gene expression in cancer cells after DeltaNp63 gene introduction using the oligonucleotide microarray approach.


RESULTS
We found that S100A2 might be a target of the DeltaNp63 pathway. To confirm the data obtained from oligonucleotide microarray, we then examined the interaction of DeltaNp63 to S100A2. S100A2 induction was strictly dependent on DeltaNp63 expression by DeltaNp63 transgene and Northern analysis. DeltaNp63 transactivated the S100A2 promoter, and significantly more fold changes were seen in DeltaNp63-introduced cells than in p53-introduced cells, suggesting that DeltaNp63 may be a novel stimulator of the S100A2 promoter.


CONCLUSIONS
Taken together, this evidence would seem to suggest that S100A2 is a novel downstream mediator of DeltaNp63.
D015152:Blotting, Northern; D001859:Bone Neoplasms; D002460:Cell Line; D045744:Cell Line, Tumor; D002630:Chemotactic Factors / Q000235:genetics / Q000502:physiology*; D015972:Gene Expression Regulation, Neoplastic; D017930:Genes, Reporter; D006801:Humans; D008156:Luciferases / Q000235:genetics; D008297:Male; D009363:Neoplasm Proteins / Q000235:genetics; D020411:Oligonucleotide Array Sequence Analysis; D012516:Osteosarcoma; D011401:Promoter Regions, Genetic / Q000235:genetics; D011467:Prostate; D009418:S100 Proteins / Q000235:genetics / Q000502:physiology*; D014162:Transfection; D016159:Tumor Suppressor Protein p53 / Q000235:genetics* / Q000378:metabolism
D002630:Chemotactic Factors; D009363:Neoplasm Proteins; D009418:S100 Proteins; C098997:S100A2 protein, human; D016159:Tumor Suppressor Protein p53; D008156:Luciferases