Interleukin-1 (IL-1) is a key mediator in the pathogenesis of cartilag
e destruction in arthritis-related disorders. Human recombinant supero
xide dismutase (SOD) blocked IL-1-mediated cartilage destruction but h
ad no effect on IL-1-mediated changes in glycosaminoglycan and prostag
landin E2 synthesis. These data suggest that superoxide anions may be
one factor of IL-1-mediated cartilage destruction.