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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Sun, Z-G Wang, Z. Zhu, L-M Fang, Y-S Yu, L-Z Xu, H. |
| Description | Country affiliation: China Author Affiliation: Sun ZG ( Department of Thoracic Surgery, Jinan Central Hospital Affiliated to Shandong University, Jinan, China.) |
| Abstract | Long-term xenograft survival is limited by delayed xenograft rejection, and monocytes are thought to play an important role in this process. Although typically considered a T cell surface marker, interleukin 2 the receptor chain CD25 is also functional on monocytes. We hypothesized that CD25 expression on monocytes functions to augment monocyte activation in xeno-specific cellular responses. Xenogeneic mixed lymphocyte-endothelial cell reactions were used to study the role of CD25 in facilitating xenogeneic cell-mediated immune responses an in vitro. We also tested the effect of the anti-CD25 antibody daclizumab on monocyte-mediated T cell activation during xeno-specific cellular responses. Co-culture with porcine endothelial cells (PEC) elicited a pronounced proliferative response by human peripheral blood mononuclear cells (PBMC) that was accompanied by upregulation of CD25 and CD40 on CD14(+) monocytes. CD4(+) cells proliferated in response to PEC-conditioned monocytes, while blockade of CD25 with daclizumab reduced CD4(+) cell proliferation in the presence of PEC-conditioned monocytes. In addition, daclizumab inhibited proliferation of PBMC in responses to PEC. Analysis of monocytes from PBMC-PEC cocultures by flow cytometry indicated that daclizumab inhibited CD40 upregulation on PEC-activated monocytes. These data demonstrate that CD25 blockade prevents xenogeneic cellular responses by directly blocking CD25 expression on both activated T cells and monocytes. CD25 blockade on T cells or monocytes may indirectly affect upregulation of CD40 on xenoreactive monocytes. Our data strengthen the rationale for incorporating CD25 directed therapy in discordant xenotransplantation. |
| File Format | HTM / HTML |
| ISSN | 00411345 |
| Issue Number | 4 |
| Volume Number | 44 |
| e-ISSN | 18732623 |
| Journal | Transplantation Proceedings |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2012-05-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Transplantation__semicolon__medicine Antigens, Cd40 Metabolism Cd4-positive T-lymphocytes Immunology Cell Communication Endothelial Cells Interleukin-2 Receptor Alpha Subunit Monocytes Animals Antibodies, Monoclonal, Humanized Pharmacology Antigens, Cd14 Drug Effects Cell Proliferation Cells, Cultured Coculture Techniques Flow Cytometry Graft Rejection Humans Immunoglobulin G Interferon-gamma Antagonists & Inhibitors Lymphocyte Activation Swine Time Factors Transplantation, Heterologous Up-regulation Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Transplantation Surgery |
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