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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
대한한방내과학회 대한한방내과학회지 대한한방내과학회지 제31권 제2호
발행연도
2010.1
수록면
189 - 200 (12page)

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Objectives : Regulatory T cells can reduce inflammation and allergic reactions through their inhibitory functions. Gardeniae Fructus(GF) is a Heat-clearing herb used in traditional Korean medicine, and a wide range of studies on its anti- inflammatory effects are being carried out. The authors investigated the effect that Gardeniae Fructus has on regulatory T cells. Methods : The authors screened 14 herbs for their effects on regulatory T cells. 100mg of each herb were separately dissolved in 1ml of sterile saline and the supernatant was harvested after 10 minutes of centrifuge at 15,000 rpm. The supernatant was filtered through a 0.2 μm syringe filter, and the resulting stock was refrigerated at 4℃. The stock was diluted before testing and used at a final concentration of 0.01μg/ml. CD4+CD25+ T cells from healthy BALB/c spleens were used as natural regulatory T cells (nTreg), and CD4+CD25- T cells were used as reactive T cells. CD4+CD25+ and CD4+CD25- T cells were activated with anti-CD3e (10㎍/㎖)/anti-CD28 (1㎍/㎖) and cultured. IL-10 from supernatant of the culture medium was measured by IL-10 cytokine ELISA. The percentages, cell numbers, phenotype and function of CD4+CD25+ Treg cells were determined by flow cytometry. Results : Gardeniae Fructus was shown to be the most potent herb among the 14 herbs tested for suppressing CD4+ CD25- reactive T cell proliferation by stimulating CD4+CD25+ natural regulatory T cells. Gardeniae Fructus induces IL-10 secretion increase by stimulating CD4+CD25+ natural regulatory T cells, and indirectly suppresses CD4+CD25- reactive T cell proliferation through increasing CD25 (IL-2 receptor α) expression and thus promoting bonding with IL-2. Gardeniae Fructus did not directly affect CD4+CD25- reactive T cell proliferation. Conclusions : Gardeniae Fructus suppressed reactive T cell proliferation through inducing increases in IL-10 secretion and CD25 (IL-2 receptor α) expression.

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