RNA therapy developer Proqr Therapeutics NV’s phase I/II study of adults with Usher syndrome and non-syndromic retinitis pigmentosa met all its key objectives, prompting the company to plan two parallel pivotal phase II/III studies that could start by year-end. The company wasted no time as it has already discussed next steps with the FDA to support the therapy’s registration “as soon as possible,” Aniz Girach, Proqr’s chief medical officer, told investors during a March 24 investor call.

A phase IIa study of Frequency Therapeutics Inc.’s lead candidate in treating hearing loss showed it fared no better than placebo, but the company said its faith in the candidate is bolstered by the belief the study was hampered by trial design issues and by data from another study.