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Significance and levels of cytokines and their receptors in renal transplant recipients

Wang Ya-wei; Min Zhi-lian. (Changzheng Hospital, Second Military Medical University, Shanghai 200003)  
The levels of soluble interlukin- 2 receptor (SIL-2R), tumor necrosis factor (TNF) , and interlukin- 6 (IL-6) were measured in 72 renal allograft recipients.Patients with stable renal function and with CsA nephotoxicity demonstrated increased SIL-2R levels (256±93kU/L, 383±73kU/L VS 125±54kU/L in healthy controls, P0. 001). TNF plasma levels were undetectable, and IL- 6 serum levels were consistently low (5kU/L) in these groups. The SIL-2R levels paralleled the SCr which declined after transplantation. The serum IL-6 levels increased rapidly, reaching to the peak levels up to 18. 25±2.36kU/L on the second posttransplant day . then, declined and stabilized at 5 kU/L within ten days. At acute rejection episods, SIL-2 level was significantly higher (1 077±448kU/L, P0. 001 VS stable) preceded by the increasc of SCr by an average of 2. 2 days. The sensitivity of SIL-2R monitoring was 94. 4% and the specificity was 91. 7%. IL-6 levels also obviously increased to a median value of 59. 9±35. 2 kU/L (P0. 001) at a mean time of 1. 2 days before the clinical phenomena. Patient with acute rejection has marked increased plasma TNF (33. 67±13. 7μg/L, P0. 01) . The positive samples were 67%. In patients with infection the levels of SIL-2R. IL-6 and TNF also elevated (1 620±397kU/L, 79. 75±61kU/L and 127. 5±83. 8kU/L). The results suggest that SIL-2R, TNF and IL-6 may be considered as the indicators of acute allograft rejection.
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