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- W2012747342 abstract "Background Acute rejection (AR) is one of the main obstacles of cardiac transplantation; however, a noninvasive diagnostic method, which reflects its pathologic nature, has not been developed yet. In this study, we prepared a specific nanobubbles targeting to the activated T cells and applied it in the ultrasound molecular imaging of AR in heart transplantation by myocardial contrast echocardiography (MCE). Methods Nanobubbles loading anti-CD25 antibody (NBspecific) or isotype control antibody (NBnonspecific) were prepared and then applied in the ultrasound molecular imaging by MCE in a rat model. MCE was performed in 24 allografts and 18 isografts that were divided into three groups, including days 2, 4, and 6 after transplantation. Confocal laser scanning microscopy was used to evaluate the binding of nanobubbles and T cells in four allografts and four isografts. Results MCE with NBspecific in allograft showed a “delayed enhancement,” and the time-intensity curve presented a second peak. The intensity and time of second peak were both positively correlated with the transplant time (P<0.01) and the pathologic grade of AR (P<0.01). Confocal laser scanning microscopy demonstrated the binding of nanobubbles and lymphocytes in myocardium post-MCE with NBspecific. Conclusions Ultrasound molecular imaging of AR after heart transplantation can be achieved by using MCE with the nanobubbles targeted to T cells. The appearance of delayed enhancement indicates the occurrence of AR, and the intensity and time of the second peak in time-intensity curve provide potential quantitative indications for diagnosis and severity of AR." @default.
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- W2012747342 date "2013-09-01" @default.
- W2012747342 modified "2023-10-03" @default.
- W2012747342 title "Ultrasound Molecular Imaging of Acute Cellular Cardiac Allograft Rejection in Rat With T-Cell–Specific Nanobubbles" @default.
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- W2012747342 doi "https://doi.org/10.1097/tp.0b013e31829b759f" @default.
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