Journal of Marine Bioscience and Biotechnology (한국해양바이오학회지)

The Korean Society for Marine Biotechnology (한국해양바이오학회)
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Fucoidan Attenuates Perfluorooctane Sulfonate-induced Apoptosis of Neuronal Cells

  • Lee, Youn Ju (Department of Pharmacology, School of Medicine, Catholic University of Daegu) ;
  • Sim, Kyung-Hwa (Department of Pharmacology, School of Medicine, Catholic University of Daegu) ;
  • Yang, Jae-Ho (Department of Pharmacology, School of Medicine, Catholic University of Daegu)
  • Received : 2017.05.18
  • Accepted : 2017.06.19
  • Published : 2017.06.30
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Abstract

Perfluorooctane sulfonate (PFOS) is one of the most widely distributed environmental pollutants and causes neurotoxicities. Fucoidan is a main bioactive constituent of the brown sea-weed and has many functions in a variety of physiological conditions. The present study attempted to investigate the potential role of fucoidan as neuroprotective marine polypeptide in environmental pollutant-induced apoptosis of neuronal cells in culture. MTT assay showed that cell viability was significantly reduced to 68 % at $30{\mu}M$ PFOS, which was recovered up to 77% and 92% in the presence of fucoidan 25 and $50{\mu}g/ml$, respectively. Cytotoxicity assay showed that LDH release was significantly increased to 160% at $30{\mu}M$ PFOS but was reduced to 150% and 122% in the presence of fucoidan 25 and $50{\mu}g/ml$, respectively. Caspase-3 activity, a hallmark of apoptosis, was measured to determine the cytotoxicity of PFOS and the cytoprotective effects of fucoidan. PFOS induced a 250% increase of caspase-3 activity at $30{\mu}M$ but the increase was dampened to 180% and 130% in the presence of fucoidan 25 and $50{\mu}g/ml$, respectively. PFOS $30{\mu}M$ induced 180 % increase in ROS accumulation, which was effectively blocked by $50{\mu}g/ml$ fucoidan (120% of control). Our results demonstrated that PFOS is a powerful neurotoxicant and fucoidan may be a protective marine bioactive polypeptide against the neurotoxic environmental pollutants. It may contribute to establishing the potential role of fucoidan as a neuroprotective polypeptide that prevents the risk of neurological disorders from the possible neurotoxic pollutants.

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References

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