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LGD-5552, an Antiinflammatory Glucocorticoid Receptor Ligand with Reduced Side Effects, in Vivo

Discovery Research, Ligand Pharmaceuticals, San Diego, California 92121

Address all correspondence and requests for reprints to: Jeffrey N. Miner, Ardea Biosciences, 4939 Directors Place, San Diego, California 92121. E-mail: jminer{at}ardeabio.com.

Treatment of inflammation is often accomplished through the use of glucocorticoids. However, their use is limited by side effects. We have examined the activity of a novel glucocorticoid receptor ligand that binds the receptor efficiently and strongly represses inflammatory gene expression. This compound has potent antiinflammatory activity in vivo and represses the transcription of the inflammatory cytokine monocyte chemoattractant protein-1 and induces the antiinflammatory cytokine IL-10. The compound demonstrates differential gene regulation, compared with commonly prescribed glucocorticoids, effectively inducing some genes and repressing others in a manner different from the glucocorticoid prednisolone. The separation between the antiinflammatory effects of LGD-5552 and the side effects commonly associated with glucocorticoid treatment suggest that this molecule differs significantly from prednisolone and other steroids and may provide a safer therapeutic window for inflammatory conditions now commonly treated with steroidal glucocorticoids.

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