Two structurally distinct chalcone dimers from Helichrysum zivojinii and their activities in cancer cell lines

Phytochemistry. 2014 Feb:98:190-6. doi: 10.1016/j.phytochem.2013.11.025. Epub 2013 Dec 19.

Abstract

Dimers tomoroside A (1) and tomoroside B (2) of the co-occuring known chalcone monomer (3), along with the seven known flavonoid glucosides (4-10), were isolated from the aerial parts of Helichrysum zivojinii Černjavski & Soška. The structures of the isolated compounds were elucidated by spectroscopic techniques. Compound 1 inhibited topo IIα and hif-1α expression and stimulated doxorubicin anticancer effect, while 2 increased the expression of hif-1α, probably acting as antioxidant and redox status modulator. Notably, 2 synergized with Tipifarnib showing potential to improve the action of this new chemotherapeutic involved in the modulation of mitogene activated protein (MAP) kinase signaling pathway.

Keywords: Asteraceae; Chalcone glucoside dimers; Drug combination; Flavonoid glucoside; HIF-1α; Helichrysum zivojinii; MAP kinase pathway; Topoisomerase IIα.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antineoplastic Agents, Phytogenic / chemistry
  • Antineoplastic Agents, Phytogenic / isolation & purification
  • Antineoplastic Agents, Phytogenic / pharmacology*
  • Cell Proliferation / drug effects
  • Chalcone / analogs & derivatives
  • Chalcone / chemistry
  • Chalcone / pharmacology*
  • Dimerization
  • Dose-Response Relationship, Drug
  • Drug Screening Assays, Antitumor
  • Flowers / chemistry*
  • Helichrysum / chemistry*
  • Humans
  • Molecular Structure
  • Structure-Activity Relationship
  • Tumor Cells, Cultured

Substances

  • Antineoplastic Agents, Phytogenic
  • Chalcone