Article: Renovis Halting MS Drug After Troubles In Phase Ia.

West Coast Editor

As word surfaced of yet another possible case of brain disease linked to the withdrawn multiple sclerosis drug Tysabri, Renovis Inc. said it is ending development of REN-850, its leukocyte-traffic inhibitor for MS, because of what it described as "unexpected pharmacokinetics" in a Phase Ia trial.

Linking REN-850 with Tysabri is "probably largely off base," said Randall Moreadith, chief medical officer of South San Francisco-based Renovis.

"We never really identified what the true target [of REN-850] was," despite great efforts, he added. Tysabri is a selective adhesion molecule inhibitor that works by binding to cell-surface ...

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