Journal
EUROPEAN JOURNAL OF VASCULAR AND ENDOVASCULAR SURGERY
Volume 20, Issue 5, Pages 419-426Publisher
W B SAUNDERS CO LTD
DOI: 10.1053/ejvs.2000.1220
Keywords
smooth muscle cells; cell proliferation; fucoidan; heparin; MAP kinase
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Objectives and design: fucoidan has previously been shown to inhibit the proliferation of arterial smooth muscle cells both in animal models and in vitro. However, the mechanisms behind the anti-proliferative effects of this polysulfated polysaccharide are not known in detail. Here, the inhibitory effect of fucoidan on mt aortic smooth muscle cell proliferation was examined and compared with the effects of heparin after stimulation with fetal calf serum, platelet-derived growth factor BE, basic fibroblast growth factor, heparin-binding epidermal growth factor, and angiotensin II. Materials and methods: the cultures were analysed with respect to cell proliferation and DNA synthesis by cell counting and measurement of H-3-thymidine incorporation. Phosphorylation of mitogen-activated protein kinase and nuclear translocation of phosphorylated mitogen-activated protein kinase were studied by immunoblotting and immunocytochemistry. Results: fucoidan was shown to be a move potent inhibitor of smooth muscle cell proliferation than heparin. Fucoidan also reduced growth factor-induced activation of mitogen-activated protein kinase and prevented nuclear translocation of phosphorylated mitogen-activated protein kinase. Conclusion:fucoidan is a more potent anti-proliferative polysulphated polysaccharide than heparin and may mediate its effects through inhibition of the mitogen-activated protein kinase pathway in a similar manner as heparin.
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