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CTLA4Ig combined with anti-LFA-1 prolongs cardiac allograft survival indefinitely.

Corbascio, Matthias (author)
Ekstrand, Helene (author)
Österholm, Cecilia (author)
Lund University,Lunds universitet,Enheten för forskning kring njurfunktion och njursjukdom,Kirurgi,Forskargrupper vid Lunds universitet,Renal Research Unit,Surgery,Lund University Research Groups
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Qi, Zhongquan (author)
Lund University,Lunds universitet,Enheten för forskning kring njurfunktion och njursjukdom,Kirurgi,Forskargrupper vid Lunds universitet,Renal Research Unit,Surgery,Lund University Research Groups
Simanaitis, Mecislovas (author)
Larsen, Christian P (author)
Pearson, Thomas C (author)
Riesbeck, Kristian (author)
Lund University,Lunds universitet,Klinisk mikrobiologi, Malmö,Forskargrupper vid Lunds universitet,Clinical Microbiology, Malmö,Lund University Research Groups
Ekberg, Henrik (author)
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 (creator_code:org_t)
2002
2002
English.
In: Transplant Immunology. - 1878-5492. ; 10:1, s. 55-61
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • CTLA4Ig and anti-LFA-1 are members of a new generation of immunomodulatory drugs which inhibit important signaling pathways in T cell activation. Both substances target molecules which have pivitol functions in the activation of CD4+ and CD8+ T cells and have been theorized to have an interdependent relationship. These drugs have been used independently in various treatment regimens and have shown great promise in prolonging the survival of allografts. In order to test whether these substances have synergistic or potentiating effects when combined, we performed mixed lymphocyte reactions, skin transplantation and vascularised heterotopic heart transplantation in the Balb/c (H-2(d)) to C3H/HeJ (H-2(k)) strain combination. When anti-LFA-1 and CTLA4Ig were combined at low doses, there was a substantial inhibition of lymphocyte proliferation. When each drug was used as a mono-therapy in skin graft recipients, there was no significant effect on median graft survival (anti-LFA-1, 15 days; CTLA4Ig, 16 days) when compared to untreated controls (13 days), whereas a combination of anti-LFA-1 and CTLA4Ig extended graft survival significantly to 32 days. Untreated vascularised heart grafts rejected at a median of 8 days, CTLA4Ig-treated mice rejected at a median time of 79 days and anti-LFA-1-treated mice rejected at 43 days (n = 9). When CTLA4Ig and anti-LFA-1 were combined, all animals had functioning heart grafts at 100 days after transplantation. Histological analysis of combined-therapy hearts showed no signs or only minor changes associated with chronic rejection. In conclusion, these results indicate a synergistic effect of combining anti-LFA-1 with CTLA4Ig in inhibiting lymphocyte proliferation and prolonging the survival of fully MHC-mismatched allografts.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Urologi och njurmedicin (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Urology and Nephrology (hsv//eng)

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