Oridonin suppresses transplant rejection by depleting T cells from the periphery.

Abstract:

:Oridonin is a natural compound purified from Rabdosia rubescens that has remarkable anti-inflammatory and antitumor activities. Although oridonin has been used in traditional Chinese medicine for many years to treat inflammatory diseases, the underlying mechanisms of these activities are not well understood. In this paper, we explored whether oridonin could be used in transplantation and the mechanisms of its immunosuppression. Oridonin efficacy in transplantation is manifested by prolonged graft survival and decreased graft infiltration. Oridonin induces T cell apoptosis in a concentration- and time-dependent manner. In vivo, oridonin depleted large numbers of T cells from the spleen and peripheral blood. Decreased T cell numbers resulted from apoptosis, which was accompanied by increased phagocyte numbers in the periphery. Reduction in the number of thymocytes was observed in mice treated for 8days, and CD4+CD8+ cells were more sensitive to apoptosis induced by oridonin. Additionally, successive treatment with oridonin for 16days resulted in a considerable reduction in the total number of spleen cells and spleen volume. Thus, T cell depletion may play an essential role in prolonged graft survival and immunosuppression induced by oridonin.

journal_name

Int Immunopharmacol

authors

Guo W,Zheng P,Zhang J,Ming L,Zhou C,Zhang S

doi

10.1016/j.intimp.2013.10.023

subject

Has Abstract

pub_date

2013-12-01 00:00:00

pages

1148-54

issue

4

eissn

1567-5769

issn

1878-1705

pii

S1567-5769(13)00403-7

journal_volume

17

pub_type

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