Abstract
The purpose of this review is to summarize the role that murine models of arthritis are playing in the understanding of human rheumatoid arthritis and how leukotriene B4 (LTB4) is emerging as an important target in this field. Both the collagen-induced arthritis (CIA) model and the K/BxN serum transfer arthritis model have contributed to outline the potential mechanisms involved in inflammatory arthritis. Indeed, the CIA model has contributed to the development of effective anti-TNFα and anti-IL-1β based treatments for RA that are currently in the clinic. Many recent studies in mouse models have suggested a critical role for LTB4 and its receptors in the development of inflammatory arthritis. Inhibitors of LTB4 biosynthesis as well as LTB4 receptors are protective in mouse models of RA and mice deficient in the LTB4 biosynthetic enzymes or LTB4 receptors are resistant to disease development suggesting several promising targets for RA in this pathway.
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