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Clinical Trial Summary

The principal purpose is the study of the regulation of the expression of ephrin-B1 by immunofluorescence in kidney biopsies of patients with Chronic transplant glomerulopathy (CTG) compared to biopsies prior to the CTG, in same patients. Level of fluorescence in CTG biopsy will be the experimental reference value.


Clinical Trial Description

Chronic transplant glomerulopathy (CTG) is a specific lesion of kidney transplantation and a poor prognostic factor affecting transplant survival. Diagnosis remains only microscopic and lesions are irreversible. Recent studies prove that there is a strong correlation between CTG and antibody mediated rejection (AMR) with a possible link with chronic aggression of the endothelial cell. However, for unknown reason, all AMR does not lead to a CTG. Our recent data on mice demonstrated that ephrin-B1 is expressed in the glomerular endothelial cells and knockout mice for the gene encoding ephrin-B1 develop progressively ultrastructural glomerular lesions close to modifications observed in CTG, as well as proteinuria and chronic renal failure, suggesting that ephrin B1 could participate to CTG. Moreover, in a preliminary study on human kidney transplant biopsy we observed decrease in ephrin-B1 immunofluorescence on glomerulus when CTG, even in low grade. These data, and ultrastructural modifications in Knock Out (KO) mice suggest that early regulation of kidney expression of ephrin-B1 in the glomerulus may occur during the process leading to the CTG as antibody-mediated kidney rejection (AMR).

The purpose of the study is to determinate if ephrin-B1 expression is modified in CTG. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT02147210
Study type Observational
Source University Hospital, Toulouse
Contact
Status Completed
Phase N/A
Start date September 2013
Completion date December 2016

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