Prosensa Announces Full Year 2013 Financial Results And Recent Corporate Developments

LEIDEN, The Netherlands, March 18, 2014 (GLOBE NEWSWIRE) -- Prosensa Holding N.V. (Nasdaq:RNA), the Dutch biopharmaceutical company focusing on RNA-modulating therapeutics for rare diseases with high unmet need, today reported financial results for the full year ending December 31, 2013, and provided an update on the next steps for its exon-skipping platform for the treatment of Duchenne Muscular Dystrophy (DMD).

"As we have previously stated, we are encouraged by initial findings from further analyses of the aggregate drisapersen data that suggest that treating earlier in DMD and treating longer shows a delay in the progression of the disease. These data give us the confidence to engage patient groups, clinical experts and regulators to explore a path forward for drisapersen," said Hans Schikan, CEO of Prosensa.

Mr. Schikan continued, "While the past few months have been a very important transition period for Prosensa, our primary focus has not changed, which is to improve the lives and outcomes of boys with DMD. At the start of the year we regained the rights to drisapersen and retained rights to our other development-stage compounds for DMD from GlaxoSmithKline (GSK). We are currently working closely with GSK to transfer data and other elements covered in the collaboration as soon as practicable and within 120 days of the January 12 effective date of the agreement. Concurrently, we are focused on the continued analysis of the complete drisapersen data set, preparing for possible re-dosing of boys and having a meaningful dialogue with regulatory authorities. We expect to communicate the status of these events during the second quarter of this year."

With data from more than 300 patients, Prosensa has the largest clinical data set in DMD. The Company is actively working to define the most optimal path forward for its DMD pipeline, which includes formulating a re-dosing plan for boys who have previously participated in clinical trials. In addition, it has enrolled 190 patients in a planned 250 patient study to better understand the natural history of DMD and potential biomarkers. Prosensa's current portfolio of drug candidates includes six compounds for the treatment of DMD with four compounds currently in clinical development, all of which have received orphan drug status in the United States and the European Union. The compounds utilize an innovative technique called exon-skipping to provide a personalized medicine approach to treat different populations of DMD patients. Furthermore, the Company has progressed PROSPECT, a unique research program which could enable expedited development of DMD therapeutic candidates that target multiple exons.

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