Abstract:
:Polyclonal rabbit antirat thymocyte serum (ATS) has been shown to form in situ glomerular immune aggregates following perfusion into normal rat kidney ex vivo. This may be due to the presence of T-cell-like epitopes in the rat kidney, or it may be a result of contaminating anti-connective-tissue antibodies in ATS. To exclude the latter possibility we investigated binding to the rat kidney of three different (mouse) monoclonal antirat thymocyte antibodies (anti-T-cell MoAbs), directed to Thy 1.1 antigen, as well as (control) anti-B-cell MoAbs. The MoAbs were incubated in vitro with kidney sections or perfused into the blood-free rat kidney ex vivo. It was shown using immunofluorescence (IF) and immunoelectron microscopy (IEM) (peroxidase technique) that the anti-T-cell MoAbs used, in contrast to anti-B-cell MoAbs, are able to bind with glomerular capillary walls, and with mesangial structures after incubation in vitro or perfusion ex vivo. Although staining patterns are not completely identical, the reaction product is clearly demonstrated throughout the glomerular basement membrane (GBM) and along the plasma membranes of endothelial and epithelial cells, after contact with either of the three anti-T-cell MoAbs used. It is concluded that the presence of T-cell-like epitopes in the rat kidney may lead to immune complex formation following contact with anti-T-cell MoAbs. The nephritogenicity of rabbit ATS, as well as of some batches of clinically used ATS, may also be explained by this mechanism rather than by the usually assumed presence of contaminating antibodies in these polyclonal antisera.
journal_name
Transplantationjournal_title
Transplantationauthors
Bagchus WM,Donga J,Rozing J,Hoedemaeker PJ,Bakker WWdoi
10.1097/00007890-198606000-00015subject
Has Abstractpub_date
1986-06-01 00:00:00pages
739-45issue
6eissn
0041-1337issn
1534-6080journal_volume
41pub_type
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