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- W2103567384 abstract "Rheumatoid arthritis (RA) is a chronic inflammatory disorder leading to bone and cartilage destruction. A substantial body of evidence suggests that prostaglandin E2 (PGE2) contributes to the pathogenesis of RA, and nonsteroidal anti-inflammatory drugs, inhibitors of the synthesis of PGE2 and other prostanoids, continue to be used in the treatment of this disease. To begin to understand the mechanism by which prostaglandins modulate the pathophysiology of this disease, we examined mice lacking each of the four known PGE2 (EP) receptors after generation of collagen antibody–induced arthritis, an animal model of RA. Homozygous deletion of the EP1, EP2, or EP3 receptors did not affect the development of arthritis, whereas EP4 receptor–deficient mice showed decreased incidence and severity of disease. These animals also showed reduced inflammation as assessed by circulating IL-6 and serum amyloid A levels. Joint histopathology of EP4–/– animals revealed reduced bone destruction, proteoglycan loss, and type II collagen breakdown in cartilage compared with EP4+/+ mice. Furthermore, liver and macrophages isolated from EP4–/– animals produced significantly less IL-1β and IL-6 than control samples. Thus, PGE2 contributes to disease progression at least in part by binding to the EP4 receptor. Antagonists of this receptor might therefore provide novel agents for the treatment of RA." @default.
- W2103567384 created "2016-06-24" @default.
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- W2103567384 date "2002-09-01" @default.
- W2103567384 modified "2023-09-27" @default.
- W2103567384 title "The role of prostaglandin E2 receptors in the pathogenesis of rheumatoid arthritis" @default.
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- W2103567384 doi "https://doi.org/10.1172/jci15528" @default.
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