Isolation and characterization of a novel oligomeric proanthocyanidin with significant anti-cancer activities from grape stems (Vitis vinifera)

Sci Rep. 2019 Aug 19;9(1):12046. doi: 10.1038/s41598-019-48603-5.

Abstract

Novel proanthocyanidin fractions from grape stem extracts were purified using Amberlite XAD-1180N, Sephadex-LH-20, Toyopearl HW40F and reverse phase high-performance liquid chromatography. Two key compounds were estimated as epigallocatechin-(epicatechin)7 gallate using electron-spray ionization time-of-flight mass spectrometry. Epigallocatechin-(epicatechin)7 gallate (compound 1) showed significant anti-cancer activity in PC-3 prostate cancer cells. In particular, compound 1 suppressed the gene expression of fatty acid-binding protein 5 (FABP5), which is involved in promoting cell proliferation and metastasis in prostate cancer cells.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antineoplastic Agents, Phytogenic / chemistry*
  • Antineoplastic Agents, Phytogenic / isolation & purification
  • Cell Cycle Checkpoints / drug effects
  • Cell Line, Tumor
  • Cell Proliferation / drug effects
  • Chromatography, High Pressure Liquid
  • Fatty Acid-Binding Proteins / genetics
  • Gene Expression Regulation, Neoplastic / drug effects
  • Humans
  • Magnetic Resonance Spectroscopy
  • Plant Extracts / chemistry*
  • Plant Extracts / isolation & purification
  • Plant Stems / chemistry*
  • Polymers*
  • Proanthocyanidins / chemistry*
  • Proanthocyanidins / isolation & purification
  • Vitis / chemistry*

Substances

  • Antineoplastic Agents, Phytogenic
  • FABP5 protein, human
  • Fatty Acid-Binding Proteins
  • Plant Extracts
  • Polymers
  • Proanthocyanidins
  • proanthocyanidin