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Ultragenyx's (RARE) IND for mRNA Therapy, UX053 Cleared by FDA

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Ultragenyx Pharmaceutical Inc. (RARE - Free Report) announced that the FDA has cleared the investigational new drug or IND application, for its lead mRNA therapy, UX053, which is being developed for the treatment of Glycogen Storage Disease Type III (“GSDIII”). Currently there is no approved treatment option available for this indication.

Notably, GSDIII is caused by a glycogen-debranching enzyme deficiency resulting in glycogen accumulation in the liver and muscle.

The company plans to begin enrollment in a phase I/II study evaluating UX053 for the given indication in the second half of 2021.

Shares of Ultragenyx have declined 16.9% so far this year compared with the industry’s decrease of 1.7%.

price chart for RARE


Per the press release, the two-part study will investigate the safety, tolerability and efficacy of UX053 in adults with GSDIII. The part 1 of the phase I/II study will enroll up to 12 patients who will receive a single ascending dose of UX053. The part 2 of the above study is a placebo-controlled multi-ascending study of 5 doses of UX053 looking to enroll around 16 patients across four cohorts randomized 3:1 to UX053 or placebo.

Notably, Ultragenyx is developing various mRNA therapies in the preclinical studies for addressing undisclosed indications. Out of these, UX053 is the most advanced and the first mRNA program to enter clinical development for rare genetic diseases.

Please note that Ultragenyx has a collaboration agreement with California-based biotech Arcturus Therapeutics (ARCT - Free Report) for developing the above-mentioned mRNA therapies.

Zacks Rank & Stocks to Consider

Ultragenyx currently carries a Zacks Rank #4 (Sell).

Better-ranked stocks in the biotech sector include Stoke Therapeutics, Inc. (STOK - Free Report) and Repligen Corporation (RGEN - Free Report) , both carrying a Zacks Rank #2 (Buy) at present. You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here.

Stoke Therapeutics’ loss per share estimates have narrowed 2.1% for 2021 over the past 60 days.

Repligen’s earnings estimates have been revised 15.1% upward for 2021 over the past 60 days.

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