Open Access

Fucoidan inhibits Ca2+ responses induced by a wide spectrum of agonists for G‑protein‑coupled receptors

  • Authors:
    • Hong Wu
    • Shuibo Gao
    • Min Fu
    • Takashi Sakurai
    • Susumu Terakawa
  • View Affiliations

  • Published online on: November 13, 2017     https://doi.org/10.3892/mmr.2017.8035
  • Pages: 1428-1436
  • Copyright : © Wu et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY 4.0].

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Abstract

Fucoidan, a sulfated polysaccharide extracted from brown seaweed, has been used in traditional Chinese herbal medicine to treat thyroid tumors for many years. Although a number of its cellular effects have been investigated, the role of fucoidan in molecular signaling, particularly in Ca2+ signaling, remains largely unknown. In the present study, the effects of fucoidan on Ca2+ responses in HeLa cells, human umbilical vein endothelial cells and astrocytes were investigated using a wide range of receptor agonists. Fucoidan inhibited the increase in intracellular free calcium concentration that was induced by histamine, ATP, compound 48/80 and acetylcholine. The responses induced by the same agonists in the absence of extracellular Ca2+ were also markedly suppressed by fucoidan. Reverse transcription‑polymerase chain reaction demonstrated that 0.5 and 1.0 mg/ml fucoidan treatment for 3 h decreased histamine receptor 1 expression in HeLa cells. Similarly, the expressions of purinergic receptor P2Y, G‑protein coupled (P2YR)1, P2YR2 and P2YR11 were significantly downregulated within cells pretreated with 1.0 mg/ml fucoidan for 3 h, and 0.5 mg/ml fucoidan significantly inhibited P2YR1 and P2YR11 expression. The results demonstrated that fucoidan may exert a wide spectrum of inhibitory effects on Ca2+ responses and that fucoidan may inhibit a number of different G‑protein coupled receptors associated with Ca2+ dynamics.
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January-2018
Volume 17 Issue 1

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
Wu H, Gao S, Fu M, Sakurai T and Terakawa S: Fucoidan inhibits Ca2+ responses induced by a wide spectrum of agonists for G‑protein‑coupled receptors. Mol Med Rep 17: 1428-1436, 2018.
APA
Wu, H., Gao, S., Fu, M., Sakurai, T., & Terakawa, S. (2018). Fucoidan inhibits Ca2+ responses induced by a wide spectrum of agonists for G‑protein‑coupled receptors. Molecular Medicine Reports, 17, 1428-1436. https://doi.org/10.3892/mmr.2017.8035
MLA
Wu, H., Gao, S., Fu, M., Sakurai, T., Terakawa, S."Fucoidan inhibits Ca2+ responses induced by a wide spectrum of agonists for G‑protein‑coupled receptors". Molecular Medicine Reports 17.1 (2018): 1428-1436.
Chicago
Wu, H., Gao, S., Fu, M., Sakurai, T., Terakawa, S."Fucoidan inhibits Ca2+ responses induced by a wide spectrum of agonists for G‑protein‑coupled receptors". Molecular Medicine Reports 17, no. 1 (2018): 1428-1436. https://doi.org/10.3892/mmr.2017.8035