Abstract
Many immune responses are dependent on the four members of the leukocyte integrin family of surface receptors. Organ transplantation triggers a range of immune responses aimed at rejecting the donor tissue. Engagement of cells of the immune system including T cells, B cells, and antigen presenting cells with each other or with the donor organ is an essential element of the rejection cascade, and this engagement is mediated by adhesions through the leukocyte integrins and their ligands. This review will first focus on the molecular mechanisms that regulate rapid activation of the leukocyte integrins by inside-out signaling that results in changes in receptor clustering on the leukocyte membrane and ligand affinity. Longer lasting changes in receptor expression through transcriptional mechanisms will also be discussed. The role of these receptors in organ transplant rejection, graft-versus-host disease, and ischemic reperfusion injury will also be reviewed. The potential of anti-adhesion therapy to prolong organ transplant survival will be discussed in both animal and patient studies.
Keywords: leukocyte integrins, transplantation, ischemic reperfusion injury, graft-versus-host
Current Medicinal Chemistry
Title: Expression and Function of the Leukocyte Integrins in Organ Transplant Rejection
Volume: 11 Issue: 4
Author(s): John D. Noti
Affiliation:
Keywords: leukocyte integrins, transplantation, ischemic reperfusion injury, graft-versus-host
Abstract: Many immune responses are dependent on the four members of the leukocyte integrin family of surface receptors. Organ transplantation triggers a range of immune responses aimed at rejecting the donor tissue. Engagement of cells of the immune system including T cells, B cells, and antigen presenting cells with each other or with the donor organ is an essential element of the rejection cascade, and this engagement is mediated by adhesions through the leukocyte integrins and their ligands. This review will first focus on the molecular mechanisms that regulate rapid activation of the leukocyte integrins by inside-out signaling that results in changes in receptor clustering on the leukocyte membrane and ligand affinity. Longer lasting changes in receptor expression through transcriptional mechanisms will also be discussed. The role of these receptors in organ transplant rejection, graft-versus-host disease, and ischemic reperfusion injury will also be reviewed. The potential of anti-adhesion therapy to prolong organ transplant survival will be discussed in both animal and patient studies.
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Cite this article as:
Noti D. John, Expression and Function of the Leukocyte Integrins in Organ Transplant Rejection, Current Medicinal Chemistry 2004; 11 (4) . https://dx.doi.org/10.2174/0929867043455945
DOI https://dx.doi.org/10.2174/0929867043455945 |
Print ISSN 0929-8673 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-533X |
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