Shares in Dutch RNA editing specialist Proqr Therapeutics NV (NASDAQ:PRQR) surged by as much as 88% Dec. 22 news that Eli Lilly and Co. is substantially expanding an existing preclinical alliance. It is paying Proqr an initial $75 million, which consists of an up-front payment and equity investment, a potential $50 million option fee should it decide to widen the scope of the partnership even further, and up to $2.5 billion in new research, development, and commercialization milestones. Proqr would also receive royalties on any resulting product sales.