alexa Intracellular IFN-γ and IL-2 expression monitoring as surrogate markers of the risk of acute rejection and personal drug response in de novo liver transplant recipients.
Medicine

Medicine

Internal Medicine: Open Access

Author(s): Milln O, RafaelValdivia L, Torradem E, Lpez A, Fortuna V,

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Abstract Biomarker monitoring is needed in transplantation to reflect individual response to immunosuppressive drugs and graft outcome. We evaluated intracellular expression and soluble production of interferon-(IFN)-γ and interleukin-(IL)-2 as predictive biomarkers of acute rejection (AR) and personal drug response. Pharmacokinetic-pharmacodynamic profiles were determined in 47 de novo liver recipients treated with tacrolimus, mycophenolate mofetil and prednisone. Of the 47 patients, AR occurred in nine. There were no differences in drug concentrations between rejectors and non-rejectors. A pre-transplantation cut-off value of 55.80\% for \%CD8(+)-IFN-γ(+) identified patients at high risk of AR with a sensitivity of 75\% and a specificity of 82\%. In the first week post-transplantation, patients with a \% inhibition for soluble IFN-γ, \%CD8(+)-IFN-γ(+) and \%CD8(+)-IL2(+) lower than 40\% developed AR, showing low susceptibility to immunosuppressive drugs. Therefore, effector-T-cell response monitoring may help physicians to identify personal response to treatment and patients at high risk of AR. Copyright © 2012 Elsevier Ltd. All rights reserved. This article was published in Cytokine and referenced in Internal Medicine: Open Access

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