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Graft Rejection

Increased serum levels of circulating intercellular adhesion molecule 1 predict the risk of graft rejection after bone marrow transplantation for thalassemia

Abstract

Beta thalassemia is a hereditary anemia curable by bone marrow transplantation (BMT). Class 3 patients have a much worse outcome with a high incidence of rejection after BMT. Adhesion molecules, including the intercellular adhesion molecule 1 are thought to play an essential role in the rejection process. To investigate whether increased levels of soluble intercellular adhesion molecule 1 (sICAM-1) may be predictive of graft rejection, the pretransplant serum concentration of sICAM-1 of 27 β thalassemic patients who rejected the graft was compared to that of 68 β thalassemic patients who achieved a sustained engraftment. Fifty serum samples, obtained from marrow donors, matched for age and sex, served as controls. β thalassemic patients had significantly higher sICAM-1 concentrations as compared to controls (P = 0.0001). Significantly increased levels of sICAM-1 were found in the patients who subsequently rejected the graft (mean (95% CI) = 490 ng/ml (440; 540)) as compared to those with sustained engraftment (400 ng/ml (384; 415)), (P = 0.004). The mean level of sICAM-1 in patients with early rejection was significantly higher than that in patients with late rejection (P = 0.04). This may indicate a transfusion-mediated role of sICAM-1: some β thalassemic patients with high sICAM-1 levels, induced by the transfusion support, may remain immunologically active, despite the conditioning regimen, therefore such patients are likely to have an early graft rejection. Our findings indicate that sICAM-1 could be a useful indicator of immune activation in polytransfused patients with β thalassemia who have a high risk of rejection. Determination of sICAM-1 has potential clinical implications in predicting which patients may reject after BMT.

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Centis, F., Delfini, C., Annibali, M. et al. Increased serum levels of circulating intercellular adhesion molecule 1 predict the risk of graft rejection after bone marrow transplantation for thalassemia. Bone Marrow Transplant 20, 125–128 (1997). https://doi.org/10.1038/sj.bmt.1700860

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  • DOI: https://doi.org/10.1038/sj.bmt.1700860

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