Abstract:
:Untreated anephric LEW rats die ca. 9 days following transplantation of LBNF1 kidney allografts. Although treatment with ART-18, a mouse antirat IL-2R mAb (300 micrograms/kg/day x 10 days), prolonged graft survival to ca. 3 weeks, the severely impaired renal function was comparable to untreated controls (creatinine levels 3-5 mg/dl). In contrast, simultaneous infusion of ART-18 and a very low dose of CsA (0.75 mg/kg x 10 days), marginally effective on its own, resulted in survival of greater than 45 days; the grafts exhibited relatively good function comparable to that in rats treated with full-dose (15 mg/kg/day) CsA. This beneficial biological effect did not depend upon elevated CsA trough levels in animals conditioned with both modalities. The CD4:CD8 ratio at the graft site was lowest (0.3-0.4) in recipients treated with ART-18 + CsA. Synergy between the two agents has been demonstrated by adoptive transfer studies in which nonspecific suppression has been conferred selectively by cells infiltrating kidney grafts in rats given ART-18 and CsA in concert but not separately (LBNF1 and WF test cardiac allograft survival ca. 12 days). In contrast, suppression in the recipient spleens was donor-specific; both CD4 and CD8 cells prolonged test graft survival. Immunohistological evaluation of renal allografts revealed that therapy with ART-18 or low-dose CsA alone failed to deplete IL-2R+ cells and prevent production of IL-2, IFN-g, and TNF. In contrast, the frequency of infiltrating IL-2R+ cells and elaboration of endogenous cytokines in non-uremic hosts receiving combination therapy was greatly depressed, stressing again synergistic interaction between ART-18 and CsA. Additionally, markedly reduced class II antigen induction, XL-fibrin deposition, and glomerulitis may also contribute to prolonged survival and satisfactory function of kidney allografts in this animal group.
journal_name
Transplantationjournal_title
Transplantationauthors
Ueda H,Hancock WW,Cheung YC,Diamantstein T,Tilney NL,Kupiec-Weglinski JWdoi
10.1097/00007890-199010000-00002subject
Has Abstractpub_date
1990-10-01 00:00:00pages
545-50issue
4eissn
0041-1337issn
1534-6080journal_volume
50pub_type
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