Alberú J, Richaud-Patin Y, Vázquez-Lavista LG, de Leo C, Guzmán-Rodríguez H, Mancilla E, Correa-Rotter R, Chew-Wong A, Llorente L. In vivo IL-10 and TGF-beta production by PBMC from long-term kidney transplant recipients with excellent graft function: a possible feedback mechanism participating in immunological stability.
Clin Transplant 2004;
18:174-8. [PMID:
15016132 DOI:
10.1046/j.1399-0012.2003.00149.x]
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Abstract
BACKGROUND
Interleukin-10 (IL-10) and transforming growth factor-beta (TGF-beta) are Th2-derived multifunctional cytokines that exhibit potent immunoregulatory and anti-inflammatory properties which might prolong graft survival. The aim of this study was to explore whether spontaneous production of IL-10 and TGF-beta by blood mononuclear cells correlates with excellent long-term graft function.
METHODS
A cross-sectional study was carried out in 32 kidney transplant recipients, without albuminuria, treated with azathioprine and prednisone. Spontaneous IL-10 and TGF-beta were measured by enzyme-linked immunosorbent assay in supernatants from 24 h cultured unstimulated peripheral blood mononuclear cells. Both cytokines were also determined in 10 healthy kidney donors.
RESULTS
There was no correlation between IL-10 or TGF-beta with any variable tested, namely age, SCr, histocompatibility, and post-transplant follow-up. In vivo IL-10 production displayed a statistical trend to be higher in transplant recipients than in controls (362.3 +/- 465, range 12.5-1929.3 pg/ml, and 189 +/- 170, range 4.17-485.7 pg/ml, respectively; p = 0.08), whereas no difference was observed in TGF-beta among the same groups (134.7 +/- 79.2, range 68-421 pg/ml, and 121.4 +/- 25.8, range 75-151 pg/ml, respectively). Interestingly, a statistically significant inverse correlation was observed between IL-10 and TGF-beta in kidney transplant recipients (p = 0.03).
CONCLUSIONS
The higher IL-10 production observed in long-term kidney transplant recipients supports the notion that this cytokine contributes in decreasing allogenic immune responses and allows prolongation of allograft survival. The balance between TGF-beta and IL-10 may be of paramount importance in graft acceptance.
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