Abstract：
ETHNOPHARMACOLOGICAL RELEVANCE:Triptolide (TPT), a component of the Chinese herb Triptergium wilfordii, has potent immunosuppressive and anti-inflammatory activity and is used clinically in recipients of kidney transplantation. AIM OF THE STUDY:This work aimed to investigate the effect of TPT on the differentiation of regulatory T lymphocytes (Tregs) from CD4+ cells in rats. MATERIALS AND METHODS:MACS-purified rat CD4+ cells were costimulated with anti-CD3 and anti-CD28 in the presence of TGF-beta to induce the expression of FoxP3, which was detected by flow cytometry. TPT and cyclosporine A (CsA) were separately added into the cultures to observe the effect on the expression of FoxP3. Kidney transplantation was performed in rats that either received no treatment or were treated with TPT after transplantation. RESULTS:TPT treatment enhanced the expression of FoxP3 in CD4+ cells, whereas CsA inhibited the FoxP3 expression. In the rat kidney transplantation model, the recipient rats treated with TPT survived longer than the control rats (18-19.83 vs 6.83 days, P<0.05). Meanwhile, the FoxP3+ T cells in the spleens of treated rats were higher than those from the untreated rats (12.4% vs 4.7%, P<0.05). CONCLUSIONS:These data suggest that TPT may promote the differentiation of CD4+ cells to FoxP3+ Tregs. This would be at least one of the pathways responsible for the immunosuppressive activity of TPT.
journal_name
J Ethnopharmacoljournal_title
Journal of ethnopharmacologyauthors
Zhang G,Liu Y,Guo H,Sun Z,Zhou YHdoi
10.1016/j.jep.2009.06.020subject
Has Abstractpub_date
2009-08-17 00:00:00pages
41-6issue
1eissn
0378-8741issn
1872-7573pii
S0378-8741(09)00394-8journal_volume
125pub_type
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