Identification of protein kinase C isozymes involved in the anti-proliferative and pro-apoptotic activities of 10-Methyl-aplog-1, a simplified analog of debromoaplysiatoxin, in several cancer cell lines

Yusuke Hanaki, Yuki Shikata, Masayuki Kikumori, Natsuki Hotta, Masaya Imoto, Kazuhiro Irie

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4 Citations (Scopus)


10-Me-aplog-1 is a simplified analog of the tumor-promoting compound debromoaplysiatoxin (DAT) and a unique protein kinase C (PKC) activator with limited tumor-promoting and pro-inflammatory activities. 10-Me-aplog-1 inhibits the growth of several cancer cell lines, but the inhibitory mechanism involving PKC isozymes remains unclear. We quantified the amount of PKC isozymes in nine human cancer cell lines that differ in 10-Me-aplog-1 sensitivity. PKCα and δ were the predominant isozymes expressed in all cell lines, but there was no significant correlation between expression levels and anti-proliferative activity. Knocking down PKCα, and/or PKCδ in the three aplog-sensitive cell lines indicated their involvement in the anti-proliferative and pro-apoptotic activities of 10-Me-aplog-1. This finding suggests that PKCα and/or PKCδ activation could be effective for treating certain cancers. Since the mechanism underlying 10-Me-aplog-1's anti-proliferative activities resembles that of DAT, 10-Me-aplog-1 may be regarded as a special key derived from pleiotropic DAT as a bunch of keys.

Original languageEnglish
JournalBiochemical and Biophysical Research Communications
Publication statusAccepted/In press - 2017 Jan 1



  • Aplysiatoxin
  • Phorbol ester
  • Protein kinase C
  • Tumor promoter

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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