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- W3182772095 abstract "Heart transplantation (HT) is an effective treatment for end-stage heart disease. However, acute rejection (AR) is still the main cause of death within one year after HT. AR is an acute immune response mediated by T lymphocytes, mainly CD4+ T lymphocytes. This study innovatively develops a radiolabeled probe 99mTc-HYNIC-mAbCD4 for noninvasive visualization of CD4+ T lymphocyte infiltration and detection of AR. The 99mTc-HYNIC-mAbCD4 and its isotype control 99mTc-HYNIC-IgG were successfully prepared and characterized. The specificity and affinity of the probe in vitro were assessed by cell-binding experiments. Binding of 99mTc-HYNIC-mAbCD4 to CD4+ T lymphocytes was higher than that of the macrophages and IgG probe groups, and mAbCD4 was effective in the blockade of the binding reaction. The biodistribution data confirmed the SPECT/CT images, with significantly higher levels of 99mTc-HYNIC-mAbCD4 observed in allografts compared to allograft treatment (10 mg/kg/d Cyclosporin A subcutaneously for 5 consecutive days after surgery), isografts, or in rats which received allografts injected with 99mTc-HYNIC-IgG. Histological examination confirmed more CD4+ T lymphocyte infiltration in the allograft hearts than other groups. In summary, 99mTc-HYNIC-mAbCD4 achieved high affinity and specificity of binding to CD4+ T lymphocytes and accumulation in the transplanted heart. Radionuclide molecular imaging with 99mTc-HYNIC-mAbCD4 may be a potential diagnostic method for acute cardiac rejection." @default.
- W3182772095 created "2021-07-19" @default.
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- W3182772095 date "2021-01-28" @default.
- W3182772095 modified "2023-10-17" @default.
- W3182772095 title "Noninvasive Radionuclide Molecular Imaging of the CD4-Positive T Lymphocytes in Acute Cardiac Rejection" @default.
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- W3182772095 doi "https://doi.org/10.1021/acs.molpharmaceut.0c01155" @default.
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