Abstract
Either of two immunostimulating factors (lpr, lipopolysaccharide) enhanced the pathogenic autoimmune responses of MRL/n mice, but the serologic and immunopathologic characteristics differed. In contrast, either factor acting alone, caused minimal immunopathology in normal mice, despite autoantibody induction. Combined immunostimulation, however, caused fatal glomerulonephritis in normal-background C57BL/6 mice. These results show the profound influence of the background genome on the effects of immunostimulating agents, and show that resistance to autoimmune disease in immunologically normal mice is not absolute.
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