This proposal is designed to examine the role of adhesion molecules in the intense cellular rejection seen when hyperacute rejection (HAR) is delayed in discordant xenograft models. Organs transplanted between discordant species undergo a rapid severe rejection over a matter of minutes which appears to be mediated by Compliment (C). When this HAR is delayed, by C depleting agents, the result is cellular infiltration and rejection which appears to be temporally different from allograft rejection. We propose to examine the cellular interactions between recipient leukocytes and the donor endothelium. More specifically, the role adhesion molecules play in cell recruitment and infiltration of the graft. We will examine the expression of cytokines in an attempt to shed light on the role they play. The ultimate goal is to allow for xenograft success between swine and humans to over come the donor shortage. That result is several years away but, we feel that the next barrier to xenograft transplantation is the cellular rejection seen when HAR is delayed Cellular interactions, specifically the adhesion molecule interaction between donor endothelial cells and recipient leukocyte, are central to this process. An understanding of these interactions is critical to overcoming this problem and may lead to therapeutic agents (monoclonal Ab) allowing xenografts to become a clinical reality.

Agency
National Institute of Health (NIH)
Institute
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Type
Postdoctoral Individual National Research Service Award (F32)
Project #
1F32DK009258-01
Application #
2136319
Study Section
Surgery and Bioengineering Study Section (SB)
Program Officer
Hyde, James F
Project Start
1995-10-05
Project End
Budget Start
1995-04-01
Budget End
1996-03-31
Support Year
1
Fiscal Year
1995
Total Cost
Indirect Cost
Name
University of Minnesota Twin Cities
Department
Surgery
Type
Schools of Medicine
DUNS #
168559177
City
Minneapolis
State
MN
Country
United States
Zip Code
55455