Abstract:
:Second-set rejection is generally considered to be mediated by cytotoxic humoral antibodies. A few discordant data have been reported, however. To address this question, we have taken advantage of a model in which specific cytotoxic alloantibodies are not produced although transplantation cellular immunity develops. Following a transplant of allogeneic stem cells from fetal liver, chimeric mice (BALB/c-->CBA--i.e., H-2d-->H-2k) were obtained; virtually all peripheral blood lymphocytes and spleen cells were of BALB/c donor origin. Anti-sheep red blood cell humoral response was present, although significantly lower in chimeras than in controls. These allochimeras were hyperimmunized by skin grafts and injections of spleen cells. The survival of skin grafts and the production of antibodies were then analyzed. When hyperimmunized against a third party, B6 (H-2b), chimeric mice were not able to raise a detectable humoral response involving anti-B6 cytotoxic antibodies, yet they rejected B6 skin allografts in an accelerated fashion (8.44 +/- 0.17 days). Control CBA mice rejecting second-set B6 skin grafts within the same delay developed high-titer, specific cytotoxic antisera (mean titer = 140). These data show that cytotoxic allospecific antibodies are not indispensable in the development of second-set accelerated rejection of skin allografts.
journal_name
Transplantationjournal_title
Transplantationauthors
Aitouche A,Touraine JLdoi
10.1097/00007890-199309000-00003subject
Has Abstractpub_date
1993-09-01 00:00:00pages
503-8issue
3eissn
0041-1337issn
1534-6080journal_volume
56pub_type
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