GSK Begins Pivotal Trial For ISIS-TTR. The company earned a $7.5 million milestone payment from their partner, GlaxoSmithKline (GSK), on the initiation of a Phase II/III trial for ISIS-TTR. ISIS-TTR is an antisense drug development candidate for the treatment of transthyretin (TTR) amyloidosis, a severe and rare genetic disease characterized by progressive dysfunction of peripheral[…]