Induction of T-cell-mediated skin disease specific for antigen transgenically expressed in keratinocytes.
Transgenic mice were generated to establish an animal model for T-cell-mediated autoimmune skin disease. A membrane-bound form of OVA (mOVA) was specifically expressed under the control of the keratin 5 (K5) promoter in the epidermal and hair follicular keratinocytes of mice. Syngeneic, wild-type mice rejected the skin grafts of K5-mOVA mice with the generation of OVA-specific CTL. To study the CTL response against K5-mOVA skin, we used OT-I transgenic mice, which produce K(b)-restricted, OVA-specific CD8+ T cells. Accelerated rejection of K5-mOVA skin was demonstrated when transplanted onto OT-I mice. Furthermore, OT-I cells, when adoptively transferred into K5-mOVA mice, underwent activation and vigorous proliferation in the skin-draining lymph nodes. A bone-marrow-reconstitution assay demonstrated that K(b) presentation by bone-marrow-derived cells, but not epithelial cells, was required for this response, indicating that cross-priming was the basis for immunity in this model. Finally, transferred OT-I cells, activated by cross-priming, targeted the skin of K5-mOVA mice, resulting in development of skin lesions that were reminiscent of toxic epidermal necrolysis. We conclude that our system provides a useful model for autoimmune skin diseases and will aid understanding of the pathomechanism of drug eruption, viral exanthema, and graft-versus-host disease.
Azukizawa
Hiroaki
H
Department of Dermatology, Course of Molecular Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan.
Kosaka
Hiroshi
H
Sano
Shigetoshi
S
Heath
William R
WR
Takahashi
Isao
I
Gao
Xing-Hua
XH
Sumikawa
Yasuyuki
Y
Okabe
Masaru
M
Yoshikawa
Kunihiko
K
Itami
Satoshi
S
D000818:Animals; D015603:Keratinocytes / Q000276:immunology*; D008198:Lymph Nodes / Q000276:immunology; D051379:Mice; D008822:Mice, Transgenic; D010047:Ovalbumin / Q000235:genetics / Q000276:immunology; D012871:Skin Diseases / Q000276:immunology*; D016038:Skin Transplantation / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
D010047:Ovalbumin