4D Molecular Therapeutics Inc.’s gene therapy, 4D-150, in wet age-related macular degeneration (wet AMD) produced positive phase IIb data as the company preps two phase III studies set to begin this year.

As the hunt goes on for a better treatment in wet age-related macular degeneration (AMD), landmark analyses of two batches of phase II gene therapy data billed as positive were disclosed during the American Society of Retina Specialists annual meeting in Stockholm, where 4D Molecular Therapeutics Inc. and Adverum Biotechnologies Inc. offered findings.

With Adverum Biotechnologies Inc.’s preliminary safety and efficacy data made public from the ongoing Luna phase II trial testing gene therapy ixoberogene soroparvovec (ixo-vec) in wet age-related macular degeneration (AMD), Wall Street promptly began stacking the results against those of competitors. CEO Laurent Fischer pointed out that ixo-vec boasts the “highest rate of injection-free patients of any study of any program at any dose.”

Adverum Biotechnologies Inc. CEO Laurent Fischer said the firm chose the more prudent route in scrapping development of gene therapy ADVM-022 (AAV.7m8-aflibercept) for diabetic macular edema (DME) as a result of dose-limiting toxicity in the phase II Infinity trial.

Earlier this month, an update on phase I/IIa data rolled out from Rockville, Md.-based Regenxbio Inc. with RGX-314 for age-related wet macular degeneration (AMD). The company has a pivotal program in subretinal delivery of the compound set to start by the end of this year, and questions about routes of administration – always an issue in AMD – continue to simmer.

Following FDA approval of Novartis AG's VEGF-A inhibitor, Beovu, in wet age-related macular degeneration earlier this month, speculation immediately started on how much market share that new therapeutic will capture at the expense of Regeneron Pharmaceutical Inc.'s Eylea.