Transcription promoter activity of the human S100A7 gene in oral squamous cell carcinoma cell lines

Hideaki Fukuzawa, Tamotsu Kiyoshima, Ieyoshi Kobayashi, Satoru Ozeki, Hidetaka Sakai

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


The S100A7 (psoriasin) gene has been shown to be markedly over-expressed in squamous cell carcinomas (SCCs) as well as in psoriasis. We herein examined the S100A7 gene promoter activity in human oral SCC cell lines to identify the putative SCC-specific regulatory regions for the S100A7 transcription. Functional deletion assays of 5′-flanking region demonstrated that the segments, (-1513 to -988), (-1954 to -1513) and (-3040 to -2578), play important roles in the transcription activity in the oral SCCs. The internal deletion of the short segments, (-1248 to -1110), (-1109 to -988) and (-1248 to -988), decreased this activity. These segments cloned upstream of the heterologous promoter increased the promoter activity in oral SCC cell line. Electrophoretic mobility shift assays, using the sequence segmental probes, (-1248 to -1110) and (-1109 to -988), showed different DNA-protein complex patterns depending on the types of used cell lines. One of the complexes was only observed in the oral SCCs. These data suggested that the segment from -1513 to -988 contains up-regulatory elements for the transcription activity of the S100A7 gene in oral SCCs.

Original languageEnglish
Pages (from-to)171-176
Number of pages6
JournalBiochimica et Biophysica Acta - Gene Structure and Expression
Issue number3-4
Publication statusPublished - Mar 2006

All Science Journal Classification (ASJC) codes

  • Structural Biology
  • Biophysics
  • Biochemistry
  • Genetics


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