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Tumor Biology

, Volume 35, Issue 7, pp 7259–7266 | Cite as

Antitumor activity of a polysaccharide from longan seed on lung cancer cell line A549 in vitro and in vivo

  • Hongmin Wang
  • Xiaohong Zhang
  • Yuexia Li
  • Ruiying Chen
  • Songyun Ouyang
  • Peizong Sun
  • Lei Pan
  • Hong Ren
  • Bo Yang
Research Article

Abstract

In this study, a water-soluble longan seed polysaccharide (WLSP), with a molecular weight of 57 kDa, was isolated from longan seed. Gas chromatography (GC) analysis showed that WLSP was composed mainly of rhamnose (Rha), mannose (Man), arabinose (Ara), galactose (Gal), and glucose (Glc), with molar ratios of 2.4:1.5:2.3:5.6:6.5. The result in 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay showed that WLSP showed a dose-dependent antiproliferative effect on the proliferation of A549 human lung cancer cells, which is consistent with the amount of lactate dehydrogenase (LDH) release from A549 cells. Prompted by this antiproliferative effect, we further examined its antiproliferative mechanism and in vivo anticancer effect. Our results showed that WLSP had the ability to cause cell cycle arrest in G1 phase, activation of caspases 3 and 9, and cleavage of poly[ADP (ribose)] polymerase (PARP) in A549 cells. The result of this in vivo study showed that WLSP could suppress the growth of xenograft A549 tumors and induce apoptosis. Taken together, these results indicate that WLSP exert an anticancer effect in vitro and in vivo and may be useful for the prevention of lung tumorigenesis.

Keywords

Longan seed Polysaccharide Lung cancer Apoptosis Caspases Cell cycle Chemoprevention 

Notes

Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant No. 31100656).

Conflicts of interest

None

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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2014

Authors and Affiliations

  • Hongmin Wang
    • 1
  • Xiaohong Zhang
    • 2
  • Yuexia Li
    • 1
  • Ruiying Chen
    • 1
  • Songyun Ouyang
    • 1
  • Peizong Sun
    • 1
  • Lei Pan
    • 3
  • Hong Ren
    • 4
  • Bo Yang
    • 4
  1. 1.Department of Respiratory, The First Affiliated HospitalZhengzhou UniversityZhengzhouChina
  2. 2.Department of RespiratoryZhengzhou Central Hospital Affiliated to Zhengzhou UniversityZhengzhouChina
  3. 3.Department of Pulmonary Diseases, Tangdu HospitalThe Fourth Military Medical UniversityXi’anChina
  4. 4.Department of Thoracic SurgeryThe First Affiliated Hospital of Health Science Center of Xi’an Jiao Tong UniversityXi’anChina

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