Structural characterization and anti-lung cancer activity of a sulfated glucurono-xylo-rhamnan from Enteromorpha prolifera

Weihua Jin, Xinyue He, Liufei Long, Qiufu Fang, Bin Wei, Jiadong Sun, Wenjing Zhang, Hong Wang, Fuming Zhang, Robert J. Linhardt

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

A sulfated glucurono-xylo-rhamnan (EP-3-H) was purified from a green alga, Enteromorpha prolifera. EP-3-H and its oligomers were characterized by high performance liquid chromatography, mass spectrometry and one and two-dimensional nuclear magnetic resource spectroscopy. The structural analysis showed EP-3-H has a backbone of glucurono-xylo-rhamnan, branches with glucuronic acid and sulfated at C3 of rhamnose and/or C2 of xylose. The inhibition of EP-3-H on human lung cancer A549 cell proliferation in vitro and its therapeutic effects in BALB/c-nu mice in vivo were determined to evaluate the anti-lung cancer activity of EP-3-H. The tumor inhibition level was 59 %, suggesting that EP-3-H might be a good candidate for the treatment of lung cancer. Surface plasmon resonance (SPR) studies revealed the IC50 on the binding of fibroblast growth factors, (FGF1 and FGF2), to heparin were 0.85 and 1.47 mg/mL, respectively. These results suggest that EP-3-H inhibits cancer proliferation by interacting with these growth factors.

Original languageEnglish
Article number116143
JournalCarbohydrate Polymers
Volume237
DOIs
StatePublished - 1 Jun 2020
Externally publishedYes

Keywords

  • Anti-lung cancer activity
  • Glucurono-xylo-rhamnan
  • Growth factor
  • Interaction
  • Surface plasmon resonance

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