Abstract

Abstract The TNF-α system is thought to play a central role in the reduced immunity of haemodialysis patients. The imbalance between the high levels of soluble TNF receptors R1 and R2 and the low levels of immunoactive TNF-α results in an increased TNF-α buffering capacity leading to reduced immune responses. Apart from impaired renal clearance of the receptors, inefficient TNF-α production as a result of the uraemia may also contribute to the imbalance between this cytokine and its receptors. In patients receiving a living-related kidney transplant, renal function is nearly normalized in a very short period. This restoration of renal function may result in a state of better immunocompetence, either as a result of improved clearance of the receptors or as a result of reversal of the uraemic state. To differentiate between these two possibilities, we measured TNF-a protein, mRNA and the soluble TNF receptors R1

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