TY - JOUR
T1 - Fate of MHC-matched corneal allografts in Th1-deficient hosts
AU - Hargrave, Sylvia L.
AU - Hay, Christina
AU - Mellon, Jessamee
AU - Mayhew, Elizabeth
AU - Niederkorn, Jerry Y.
PY - 2004/4
Y1 - 2004/4
N2 - PURPOSE. To determine whether the Th1 cytokine, interferon (IFN)-γ, is necessary for corneal graft rejection. METHODS. Full-thickness penetrating keratoplasties were performed in normal mice and in IFN-γ knockout (KO) mice. RESULTS. Sixty-four percent of the MHC-mismatched corneal allografts were rejected in IFN-γ KO mice. By contrast, MHC-matched corneal allografts were rejected in 50% to 77% of the wild-type hosts, but were not rejected in any of the IFN-γ KO mice or the wild-type mice treated with anti-IFN-γ monoclonal antibody. Corneal graft rejection in IFN-γ-deficient hosts was characterized by an eosinophilic infiltrate compared with a mononuclear inflammatory infiltrate in normal mice. CONCLUSIONS. IFN-γ is not necessary for the rejection of MHC-mismatched corneal grafts. However, IFN-γ and Th1 immune mechanisms are necessary for the rejection of MHC-matched corneal allografts that confront the host with foreign minor histocompatibility antigens. The immune response in atopic patients, as in IFN-γ KO mice, is characterized by cross-regulation of Th1 cytokines, such as IFN-γ. The present results indicate that MHC matching dramatically reduces the risk of corneal graft rejection when IFN-γ is depressed or absent. Thus, MHC matching may reduce the risk of corneal graft rejection in patients with atopic keratoconus.
AB - PURPOSE. To determine whether the Th1 cytokine, interferon (IFN)-γ, is necessary for corneal graft rejection. METHODS. Full-thickness penetrating keratoplasties were performed in normal mice and in IFN-γ knockout (KO) mice. RESULTS. Sixty-four percent of the MHC-mismatched corneal allografts were rejected in IFN-γ KO mice. By contrast, MHC-matched corneal allografts were rejected in 50% to 77% of the wild-type hosts, but were not rejected in any of the IFN-γ KO mice or the wild-type mice treated with anti-IFN-γ monoclonal antibody. Corneal graft rejection in IFN-γ-deficient hosts was characterized by an eosinophilic infiltrate compared with a mononuclear inflammatory infiltrate in normal mice. CONCLUSIONS. IFN-γ is not necessary for the rejection of MHC-mismatched corneal grafts. However, IFN-γ and Th1 immune mechanisms are necessary for the rejection of MHC-matched corneal allografts that confront the host with foreign minor histocompatibility antigens. The immune response in atopic patients, as in IFN-γ KO mice, is characterized by cross-regulation of Th1 cytokines, such as IFN-γ. The present results indicate that MHC matching dramatically reduces the risk of corneal graft rejection when IFN-γ is depressed or absent. Thus, MHC matching may reduce the risk of corneal graft rejection in patients with atopic keratoconus.
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U2 - 10.1167/iovs.03-0515
DO - 10.1167/iovs.03-0515
M3 - Article
C2 - 15037587
AN - SCOPUS:2142702293
SN - 0146-0404
VL - 45
SP - 1188
EP - 1193
JO - Investigative Ophthalmology and Visual Science
JF - Investigative Ophthalmology and Visual Science
IS - 4
ER -