کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1981805 | 1539421 | 2013 | 5 صفحه PDF | دانلود رایگان |
• Tannic acid (TA) is highly galloylated pentagalloylglucose derived from oriental herbs.
• Germline transcript (GT) expression is indispensable for immunoglobulin (Ig) E class switching.
• PGG and TA inhibit ɛGT expression by attenuating IL-4 signaling.
• TA attenuates ovalbumin-induced IgE production in vivo.
Interleukin (IL)-4 is a critical stimulator that induces ɛ germline transcripts (ɛGT) for switch recombination to initiate immunoglobulin (Ig) E and is important in allergic disease pathogenesis. We found pentagalloylglucose (PGG) inhibited IL-4-induced ɛGT expression. PGG exerted its inhibitory function by suppressing IL-4-induced activation of IL-4Rα, JAK3 and STAT6. Furthermore, tannic acid, a higher galloylated PGG, attenuated ovalbumin-induced IgE production in vivo by inhibiting IL-4-induced ɛGT expression and the IL-4 signaling pathway. In conclusion, our results suggest that tannic acid may attenuate allergic diseases by suppressing IgE production by inhibiting IL-4-induced signaling.
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Journal: FEBS Open Bio - Volume 3, 2013, Pages 341–345