Fucoidan选择性抑制LPS诱导巨噬细胞分泌IL-12

Immunological Journal(2006)

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Abstract
目的探讨配体fucoidan活化清道夫受体后能否抑制LPS刺激巨噬细胞分泌IL-12。方法不同剂量的fu-coidan(以多价阴离子chondroitin为阴性对照)与RAW264.7作用10 min后,加入等量的LPS刺激,检测上清中IL-12p70I、L-6和TNF-α;同时观察不同剂量fucoidan对RAW264.7贴壁的影响。结果不同剂量的fucoidan能不同程度促进LPS诱导RAW264.7分泌炎症因子IL-6和TNF-α,但却能明显地抑制IL-12的分泌;随着所加fucoidan量的增加,RAW264.7细胞的贴壁能力逐渐下降。结论Fucoidan可能通过与清道夫受体SR-A(scavenger receptor A)结合发挥其特异抑制LPS诱导巨噬细胞分泌IL-12的作用。
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Key words
RAW264.7,Interleukin-12,LPS,Fucoidan
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