Allogeneic Sensitization and Tolerance Induction After Corneal Endothelial Cell Transplantation in Mice.
We evaluated the allogeneic response after corneal endothelial cell transplantation in the anterior chamber (AC) in a new mouse model by examining the acquisition of a delayed-type hypersensitivity (DTH) response, induction of allogeneic AC-associated immune deviation (ACAID), and acquisition of delayed transplantation tolerance.



The corneal eyecups from C57BL/6 mice were prepared. The epithelial layer was detached with EDTA solution and treated with trypsin to release mouse-derived primary corneal endothelial cells (mpCECs). The mpCECs (1 × 104 cells) were transplanted into the AC of the eye or subcutaneously (SC) into the neck of BALB/c mice. In the mouse model of endothelial cell transplantation, the endothelial cells in a 2-mm central area of the cornea were eliminated by cryoinjury. The mpCEC transplant model was evaluated by measuring allogeneic cell survival and corneal thickness. The allospecific DTH response and ACAID induction were evaluated 1 week after transplantation. The long-term transplantation tolerance was evaluated by observing a secondary penetrating keratoplasty (PKP) performed on the same donor C57BL/6 mice.



The SC injection of mpCECs induced a DTH response, whereas the AC injection induced ACAID. However, eyes inflamed by cryoinjury showed neither the DTH response nor ACAID following AC injection. The mpCECs survived for at least 1 week after injection. Penetrating keratoplasty allografts at 8 weeks after mpCEC transplantation survived indefinitely (100%).



The mpCECs display low allogenicity in the AC and are capable of inducing allogeneic tolerance. Corneal endothelial cell transplantation into the AC may represent a safe technique for allogeneic transplantation.
Department of Ophthalmology Kyoto Prefectural University of Medicine, Kyoto, Japan 2Department of Ophthalmology, Meiji University of Integrative Medicine, Kyoto, Japan 3Department of Mechanism of Aging, Research Institute, National Center for Geriatrics and Gerontology, Aichi, Japan.
Jun
J
Yamada
Department of Ophthalmology Kyoto Prefectural University of Medicine, Kyoto, Japan.
Morio
M
Ueno
Department of Ophthalmology Kyoto Prefectural University of Medicine, Kyoto, Japan.
Munetoyo
M
Toda
Department of Ophthalmology Kyoto Prefectural University of Medicine, Kyoto, Japan.
Katsuhiko
K
Shinomiya
Department of Ophthalmology Kyoto Prefectural University of Medicine, Kyoto, Japan.
Chie
C
Sotozono
Department of Frontier Medical Science and Technology for Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan.
Shigeru
S
Kinoshita
Department of Ophthalmology Kyoto Prefectural University of Medicine, Kyoto, Japan.
Junji
J
Hamuro
D000818:Animals; D000867:Anterior Chamber / Q000276:immunology; D017690:Cell Transplantation / Q000379:methods*; D015715:Corneal Edema / Q000473:pathology / Q000601:surgery*; D016039:Corneal Transplantation / Q000379:methods*; D004195:Disease Models, Animal; D004728:Endothelium, Corneal / Q000166:cytology / Q000637:transplantation*; D006085:Graft Survival / Q000276:immunology*; D006968:Hypersensitivity, Delayed / Q000276:immunology* / Q000473:pathology; D007108:Immune Tolerance; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D014184:Transplantation, Homologous