A novel indole compound, AWT-489, inhibits prostaglandin D 2-induced CD55 expression by acting on DP prostanoid receptors as an antagonist in LS174T human colon cancer cells

Satomi Oyama, Hiromichi Fujino, Risa Yamazaki, Iori Okura, John W. Regan, Atsuko Awata, Takayoshi Arai, Toshihiko Murayama

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Indoles are composed of a common core structure, the indole ring, and are widely used as pharmaceuticals and their precursors. In this study, a newly composed relatively small indole compound, AWT-489 was examined to find a novel specific antagonist for DP receptors; the cognate receptors for prostaglandin D2 (PGD2), to prevent colon cancer malignancy. Here we showed that AWT-489 antagonized DP receptor-mediated cyclic AMP formation, and expression of CD55, an inhibitor of the complement system that correlates with poor survival in patients with colorectal cancer, in LS174T human colon cancer cells. Interestingly, unlike a popular indole compound, indomethacin, AWT-489 did not act on the cyclooxygenases as a non-steroidal anti-inflammatory drug. Moreover, AWT-489 exhibited a better inhibitory effect than that of the well-used DP receptor antagonist, BWA868C when a dose close to the physiological concentration of PGD2 was used. These results suggest that AWT-489 can act as a novel human DP receptor antagonist to reduce the expression of CD55 in LS174T human colon cancer cells. We believe that AWT-489 has potential as a lead compound for designing a new DP receptor antagonist that may help improve PGD2-related diseases, especially colon cancer in the near future.

Original languageEnglish (US)
Pages (from-to)21-29
Number of pages9
JournalArchives of Biochemistry and Biophysics
Volume541
Issue number1
DOIs
StatePublished - 2014

Keywords

  • AWT-489
  • CD55
  • DP receptor antagonist
  • Indole
  • LS174T cells

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology

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