(Interferon-gamma-Secreting) T-cell populations in rejecting murine cardiac allografts: Assessment by flow cytometry
Interplay between T-helper-1 (Th1) and T-helper-2 (Th2) cells is considered important in the development of acute allograft rejection and many other immune-mediated disease processes. Existing methods for evaluating expression of Th1 and Th2 cytokines, including reverse transcriptase polymerase chai...
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Published in | The American journal of pathology Vol. 153; no. 5; p. 1383 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Hagerstown
American Society for Investigative Pathology
01.11.1998
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Abstract | Interplay between T-helper-1 (Th1) and T-helper-2 (Th2) cells is considered important in the development of acute allograft rejection and many other immune-mediated disease processes. Existing methods for evaluating expression of Th1 and Th2 cytokines, including reverse transcriptase polymerase chain reaction (RT-PCR), RNase protection assay (RPA), immunohistochemistry, and enzyme-linked immunosorbent assay (ELISA) all have limitations; alternate techniques to quantify cell populations expressing specific cytokine proteins, generate statistically analyzable data, and allow simultaneous identification of cytokine-secreting cell type are needed. To this end, we adapted a flow cytometric technique for intracellular cytokine immunofluorescence staining for use with cells isolated from solid tissue. To demonstrate the utility of the method, we determined the number of CD4+ and CD8+ cells secreting the prototypical Th1 and Th2 cytokines, interferon (IFN)-gamma, and interleukin (IL)-4 in acutely rejecting murine cardiac allografts. We also measured the cytokine production via ELISA, RPA, and semiquantitative competitive RT-PCR. The number of CD4+ cells producing IFN-gamma increased as rejection proceeded, in agreement with previous data; we detected no IL-4 production at any time, although relatively low numbers of IL-10-producing cells were identified. In addition, a high percentage of CD8+ cells, which outnumber CD4+ cells at day 6 after transplant, also produce IFN-gamma, suggesting that cytotoxic lymphocytes contribute significantly to the local cytokine milieu. This new application of intracellular cytokine staining provides a powerful methodology for studying transplantation immunology. The method may also be easily adapted to the study of other immune-mediated processes. |
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AbstractList | Interplay between T-helper-1 (Th1) and T-helper-2 (Th2) cells is considered important in the development of acute allograft rejection and many other immune-mediated disease processes. Existing methods for evaluating expression of Th1 and Th2 cytokines, including reverse transcriptase polymerase chain reaction (RT-PCR), RNase protection assay (RPA), immunohistochemistry, and enzyme-linked immunosorbent assay (ELISA) all have limitations; alternate techniques to quantify cell populations expressing specific cytokine proteins, generate statistically analyzable data, and allow simultaneous identification of cytokine-secreting cell type are needed. To this end, we adapted a flow cytometric technique for intracellular cytokine immunofluorescence staining for use with cells isolated from solid tissue. To demonstrate the utility of the method, we determined the number of CD4+ and CD8+ cells secreting the prototypical Th1 and Th2 cytokines, interferon (IFN)-gamma, and interleukin (IL)-4 in acutely rejecting murine cardiac allografts. We also measured the cytokine production via ELISA, RPA, and semiquantitative competitive RT-PCR. The number of CD4+ cells producing IFN-gamma increased as rejection proceeded, in agreement with previous data; we detected no IL-4 production at any time, although relatively low numbers of IL-10-producing cells were identified. In addition, a high percentage of CD8+ cells, which outnumber CD4+ cells at day 6 after transplant, also produce IFN-gamma, suggesting that cytotoxic lymphocytes contribute significantly to the local cytokine milieu. This new application of intracellular cytokine staining provides a powerful methodology for studying transplantation immunology. The method may also be easily adapted to the study of other immune-mediated processes. |
Author | Nagano, Hiroaki Stinn, Jennifer L Becker, Gerold Taylor, Marta K |
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Snippet | Interplay between T-helper-1 (Th1) and T-helper-2 (Th2) cells is considered important in the development of acute allograft rejection and many other... |
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Title | (Interferon-gamma-Secreting) T-cell populations in rejecting murine cardiac allografts: Assessment by flow cytometry |
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