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A murine model of experimental autoimmune lens-induced uveitis using Klebsiella O3 lipopolysaccharide as a potent immunological adjuvant.

Experimental autoimmune uveitis and finally panophthalmitis could be produced in mice by repeated immunization of syngeneic eyeball extract mixed with Klebsiella O3 lipopolysaccharide (KO3 LPS) as a powerful immunological adjuvant. No ocular lesions were produced in mice given eyeball extract emulsified in complete Freund's adjuvant (CFA), KO3 LPS alone or eyeball extract alone. Histopathological changes in the ocular lesions at the early stage after the second or tertiary immunization were characterized by infiltration with inflammatory cells in the ciliary body and iris. The iridocyclitis was followed by extensive infiltration of polymorphonuclear leucocytes (PMN) into the cornea, lens and the surrounding tissues after repeated immunization. Finally, these areas were replaced by granulomatous tissues infiltrated with mononuclear cells. On the other hand, the structure of the retina and sclera was partially preserved. Those mice exhibited production of autoantibodies and development of the delayed-type hypersensitivity (DTH) to syngeneic eyeball extract. Moreover, ocular lesions could be produced in normal recipient mice by transfer of sensitized lymphocytes from hyperimmunized mice. Therefore, it was suggested that the ocular lesions produced by repeated immunization with the mixture of eyeball extract and KO3 LPS were due to the autoimmune mechanism. This might be useful to model immunological phenomena in the pathogenesis of human phacoantigenic uveitis.