Abstract:
:We previously reported that fucoidan, a dietary fiber purified from seaweed, inhibited IgE production by B cells in vitro. In this study, we examined the effect of fucoidan on IgE production in vivo. The OVA-induced increase of plasma IgE was significantly suppressed when fucoidan was intraperitoneally, but not orally, administered prior to the first immunization with OVA. The production of IL-4 and IFN-gamma in response to OVA in spleen cells isolated from OVA-sensitized mice treated with fucoidan in vivo was lower than that from mice treated without fucoidan. Moreover, the flow cytometric analysis and ELISpot assay revealed that the administration of fucoidan suppressed a number of IgE-expressing and IgE-secreting B cells, respectively. These results indicate that fucoidan inhibits the increase of plasma IgE through the suppression of IgE-producing B cell population, and the effect of fucoidan in vivo is crucially dependent on the route and timing of its administration.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Yanase Y,Hiragun T,Uchida K,Ishii K,Oomizu S,Suzuki H,Mihara S,Iwamoto K,Matsuo H,Onishi N,Kameyoshi Y,Hide Mdoi
10.1016/j.bbrc.2009.07.031subject
Has Abstractpub_date
2009-09-25 00:00:00pages
435-9issue
3eissn
0006-291Xissn
1090-2104pii
S0006-291X(09)01361-8journal_volume
387pub_type
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