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Profile of the Pleximmune blood test for transplant rejection risk prediction #MMPMID26760313
Sindhi R; Ashokkumar C; Higgs BW; Levy S; Soltys K; Bond G; Mazariegos G; Ranganathan S; Zeevi A
Expert Rev Mol Diagn 2016[]; 16 (4): 387-93 PMID26760313show ga
The Pleximmune? test (Plexision Inc., Pittsburgh, PA, USA) is the first cell-based test approved by the US FDA, which predicts acute cellular rejection in children with liver- or intestine transplantation. The test addresses an unmet need to improve management of immunosuppression, which incurs greater risks of opportunistic infections and Epstein?Barr virus-induced malignancy during childhood. High-dose immunosuppression and recurrent rejection after intestine transplantation also result in a 5-year graft loss rate of up to 50%. Such outcomes seem increasingly unacceptable because children can experience rejection-free survival with reduced immunosuppression. Pleximmune test sensitivity and specificity for predicting acute cellular rejection is 84% and 81% respectively in training set?validation set testing of 214 children. Among existing gold standards, the biopsy detects but cannot predict rejection. Anti-donor antibodies, which presage antibody-mediated injury, reflect late-stage allosensitization as a downstream effect of engagement between recipient and donor cells. Therefore, durable graft and patient outcomes also require an accurate management of cellular immune responses in clinical practice.