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2014 ; 2014
(ä): 571508
Nephropedia Template TP
Takagi R
; Kawano M
; Nakagome K
; Hashimoto K
; Higashi T
; Ohbuchi K
; Kaneko A
; Matsushita S
Int J Inflam
2014[]; 2014
(ä): 571508
PMID24971189
show ga
Allergic airway inflammation is generally considered to be a Th2-type immune
response. Recent studies, however, have demonstrated that Th17-type immune
responses also play important roles in this process, particularly in the
pathogenesis of neutrophilic airway inflammation, a hallmark of severe asthma. We
scrutinized several Kampo extracts that reportedly exhibit anti-inflammatory
activity by using in vitro differentiation system of human and mouse naïve T
cells. We found that hange-shashin-to (HST) and oren-gedoku-to (OGT) possess
inhibitory activity for Th17 responses in vitro. Indeed, wogonin and berberine,
major components common to HST and OGT, exhibit Th17-inhibitory activities in
both murine and human systems in vitro. We therefore evaluated whether wogonin
suppresses OVA-induced neutrophilic airway inflammation in OVA TCR-transgenic
DO11.10 mice. Consequently, oral administration of wogonin significantly improved
OVA-induced neutrophilic airway inflammation. Wogonin suppressed the
differentiation of naïve T cells to Th17 cells, while showing no effects on
activated Th17 cells.