Boesenberols, Pimarane Diterpenes with TRAIL-Resistance-Overcoming Activity from Boesenbergia pandurata

Utpal K. Karmakar, Naoki Ishikawa, Midori A. Arai, Firoj Ahmed, Takashi Koyano, Thaworn Kowithayakorn, Masami Ishibashi

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


TRAIL is a potent and selective inducer of apoptosis in most cancer cells while sparing normal cells, which makes it an attractive target for the development of new cancer therapies. In a screening program on natural resources with the ability to abrogate TRAIL resistance, the bioassay-guided fractionation of Boesenbergia pandurata rhizomes resulted in the isolation of 17 pimarane diterpenes and a monoterpene. Among these, compounds 1-8, named boesenberols A-H, are new pimarane diterpenes. All compounds exhibited TRAIL-resistance-overcoming activity in TRAIL-resistant AGS cells. Subtoxic doses of the major compound 9 sensitized AGS cells to TRAIL-induced apoptosis by up-regulating apoptosis-inducing proteins, such as DR4, DR5, p53, Fas, CHOP, Bak, and cleaved caspases-3, -8, and -9, and down-regulating the levels of cell survival proteins, such as Bcl-2, c-FLIP, and GSK-3β, in TRAIL-resistant AGS cells. Furthermore, compound 9 did not decrease the viability of noncancerous (HEK293) cells at concentrations up to 30 μM.

Original languageEnglish
Pages (from-to)2075-2082
Number of pages8
JournalJournal of Natural Products
Issue number8
Publication statusPublished - 2016 Aug 26
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry
  • Molecular Medicine
  • Pharmacology
  • Pharmaceutical Science
  • Drug Discovery
  • Complementary and alternative medicine
  • Organic Chemistry


Dive into the research topics of 'Boesenberols, Pimarane Diterpenes with TRAIL-Resistance-Overcoming Activity from Boesenbergia pandurata'. Together they form a unique fingerprint.

Cite this