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Clin Transplant. 2008 Sep-Oct;22(5):549-54. doi: 10.1111/j.1399-0012.2008.00819.x. Epub 2008 Apr 3.

Pharmacodynamic immune monitoring of NFAT-regulated genes predicts skin cancer in elderly long-term renal transplant recipients.

Author information

1
Department of Nephrology, University Hospital, University of Heidelberg, Germany. claudia.sommerer@med.uni-heidelberg.de

Abstract

INTRODUCTION:

Among elderly allograft recipients non-melanoma skin cancer (NMSC) is the most common malignancy. We have previously shown that malignancies are associated with a higher intensity of ciclosporin A (CsA)-induced immunosuppression.

METHOD:

Fifty-five long-term elderly renal transplant patients with a stable transplant function had regular skin examinations. The expression of the nuclear factor of activated T cells (NFAT)-regulated genes (interleukin-2, granulocyte-macrophage colony stimulating-factor, interferon-gamma) was determined by real-time PCR at CsA trough levels and two h after oral intake.

RESULTS:

The CsA dose was 2.0 mg/kg (0.95-3.50), with CsA trough level (C0) level 97 microg/L (33-157) and CsA two-h level (C2) 538 microg/L (350-1228). NMSC was diagnosed in 14/55 patients (25.4%). A total of 85.7% of allograft recipients with NMSC were male (p < 0.005). Age, time after transplantation, CsA dose, CsA C0 and C2 level were comparable in both groups. NFAT-regulated gene expression was signficantly lower in patients with skin cancer compared with patients without skin cancer [4.94% (0.91-13.4) vs. 11.6% (3.3-40.8), p < 0.001).

CONCLUSION:

The unproportional high incidence of NMSC in elderly long-term kidney-transplanted patients correlates with a lower NFAT-regulated gene expression which is a surrogate biomarker for a higher degree of functional immunosuppression. Further studies are required to determine whether the reduction of CsA with an increased NFAT-regulated gene expression is associated with a lower NMSC incidence.

[Indexed for MEDLINE]

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