Abstract:
:The immunological events mediated by, and antigen specificity of, allograft-bound lymphocytes (ABLs) are poorly understood. To further define the role of antibody-mediated rejection, a rejected allograft from a patient with primary anti-TBM disease was sterilely minced and pressed through a microscreen. The ABLs were isolated by density gradient centrifugation. Using this technique, 8.5 X 10(6) ABLs were isolated. Then 1 X 10(6) washed ABLs/ml were suspended in RPMI 1640 with 20% fetal calf serum and cultured in microtiter plates with media only, or with pokeweed mitogen (PWM) (100 micrograms/culture). The cells were incubated for 7 days and supernatants were collected and assayed for total IgG and IgM by a solid-phase enzyme immunoassay (EIA) and reactivity with normal human kidney targets by indirect immunofluorescence (IF) and immunoperoxidase (IP) techniques. Total IgG production was 500 ng/ml for both spontaneous and PWM stimulated cells. No IgM production was detected. IF and IP studies demonstrated IgG-anti-TBM antibodies in the spontaneous supernatants only. IgG antibodies reactive with peritubular capillaries (anti-PTC) were also noted. IgG-anti-TBM anti-bodies and antibodies reactive with arterioles were subsequently demonstrated by direct immunofluorescence techniques in the rejected allograft. Analysis of serum samples obtained at the time of allograft rejection showed no IF or IP reactivity with the kidney targets. Subsequent analysis of anti-TBM production by the patient's peripheral blood mononuclear cells (PBMs) showed IgM-anti-TBM only. These studies suggest that the IgG-anti-TBM and IgG-anti-PTC antibodies reactive with the allograft resulted from in situ antibody production by ABLs; the role of anti-TBM antibodies in mediating the AR is unclear, but their presence suggests recurrence of the original disease in the allograft. Anti-PTC antibodies could be important in mediation of the vascular AR.
journal_name
Transplantationjournal_title
Transplantationauthors
Jordan SC,Barkley SC,Lemire JM,Sakai RS,Cohen A,Fine RNdoi
10.1097/00007890-198602000-00008subject
Has Abstractpub_date
1986-02-01 00:00:00pages
173-6issue
2eissn
0041-1337issn
1534-6080journal_volume
41pub_type
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