Abstract
Objective
To investigate the mechanism of action of emodin for suppressing acute allograft rejection in a rat model of liver transplantation.
Methods
Brown Norway (BW) recipient rats of orthotopic liver transplantation (OLT) were divided into three groups, Group A receiving isografting (with BW rats as donor), Group B receiving allografting (with Lewis rats as donor), Group C receiving allografting and emodin treatment (50 mg/kg daily). They were sacrificed on day 7 of post-transplantation, and their hepatic histology, plasma cytokine levels, and T-cell subset expression were detected.
Results
Compared with those in Group A, rats: in Group B exhibited severe allograft rejection with a rejection activity index (RAI) of 7.67±0.98, extensive hepatocellular apoptosis with an apoptosis index (AI) of 35.83±2.32, and elevated plasma levels of interleukin-2 (IL-2), interleukin-10 (IL-10), tumor necrosis factor-α (TNF-α), CD4+ and CD4 CD4+/CD8+ ratio. However, recipients in Group C showed a decrease in histological grade of rejection and hepatocellular apoptosis, as well as a decrease in plasma levels of IL-2, TNF-α, CD4+ and CD4+/CD8+ ratio, but elevated levels of IL-10 as compared with the allograft group.
Conclusion
Post-OLT acute rejection could be attenuated by emodin, its mechanism of action may be associated with protecting hepatocytes from apoptosis, polarizing the Th 1 paradigm to Th2, and inhibiting the proliferation of CD4+ T cell in plasma.
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Supported by the National Natural Science Foundation of China (No. 30572395, No. 30973815).
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Lin, Sz., Tong, Hf., Chen, Kj. et al. Effect of emodin in suppressing acute rejection following liver allograft transplantation in rats. Chin. J. Integr. Med. 16, 151–156 (2010). https://doi.org/10.1007/s11655-010-0151-7
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DOI: https://doi.org/10.1007/s11655-010-0151-7