Peripheral-type benzodiazepine receptor expression level as an index of organ damage and regeneration
The present invention relates to methods, reagents, and kits for assessing organ damage, such as damage due to ischemia reperfusion injury, in the course of a transplantation therapy and/or for assessing organ regeneration following transplantation therapy. The invention provides a method for determining an index of organ health in the course of transplantation therapy comprising measuring the expression level of peripheral-type benzodiazepine receptor (PBR) in the organ. Measuring the expression level of PBR is also useful for assessing the progress of organ regeneration in the course of transplantation therapy by comparing the index of organ health. The expression level of PBR may be used as a predictor of the outcome of transplantation therapy.
1. A method for determining an index of organ health in the course of transplantation therapy comprising measuring an expression level of peripheral-type benzodiazepine receptor (PBR) in an organ, wherein the organ is a kidney, whereby said index is determined by correlating the expression level of PBR with an assessment of organ health.
2. The method of claim 1 , further comprising obtaining a tissue sample of the organ and measuring the expression level of peripheral-type benzodiazepine receptor (PBR) in said tissue sample.
3. The method of claim 1 , wherein the index of organ health is an index of ischemia reperfusion injury.
4. The method of claim 1 , wherein the index of organ health is an index of ischemia reperfusion injury incident to a renal transplant procedure.
5. The method of claim 1 , wherein the expression level of peripheral-type benzodiazepine receptor is measured using a method chosen from one or more of immunohistochemistry, electrophoretic blotting, hybridization of a nucleic acid probe to mRNA, observing binding of radiolabeled ligand, observing binding of fluorescence labeled ligand, observing binding of isotopically labeled ligand, in vivo scanning using isotopically labeled ligand of PBR and combinations thereof.
6. The method of claim 1 , wherein the index of organ health is determined at one or more points in the course of transplantation therapy selected from among time of organ extraction, time of organ storage, immediately prior to organ implantation, following reperfusion in a recipient, at one or more intervals following transplantation procedure and combinations thereof.