Acadia Pharmaceuticals Inc. will make available by the end of this month Daybue (trofinetide), a synthetic analogue of the amino‐terminal tripeptide of IGF-1 for Rett syndrome (RS), which was greenlighted by the U.S. FDA March 10 and remains in the works for fragile X syndrome as well as undisclosed other indications.
Pricing won’t be known until later for Pfizer Inc.’s Zavzpret (zavegepant), which became the first and only calcitonin gene-related peptide receptor antagonist nasal spray approved by the U.S. FDA for acute treatment of migraine with or without aura in adults. The product is slated to launch this summer. Meanwhile, Wall Street has questions about New York-based Pfizer’s performance in the migraine space.
Molecular Templates Inc. has received IND clearance from the FDA for its novel MT-8421 engineered toxin bodies (ETB) program targeting cytotoxic T-lymphocyte protein 4 (CTLA-4) in patients with relapsed/refractory solid tumors previously exposed to checkpoint inhibitors. MT-8421 is designed to eliminate CTLA-4-expressing regulatory T cells (Tregs) in the tumor microenvironment (TME) through a direct cell-kill mechanism independent of the effector cell presence that antibodies rely upon while not affecting Tregs in the periphery.
The U.S. FDA has accepted Mesoblast Ltd.’s BLA resubmission for its allogeneic stem cell treatment remestemcel-L in children with steroid-refractory acute graft-vs.-host disease (SR-aGVHD). Mesoblast received a complete response letter from the FDA in October 2020 for remestemcel-L even though approval was highly anticipated after the FDA’s Oncologic Drugs Advisory Committee voted 9-1 that the stem cell therapy showed evidence of efficacy as a treatment for SR-aGVHD in children.
Estrella Biopharma Inc. has received FDA clearance of its IND application for lead product candidate EB-103, a T-cell therapy targeting CD19, a protein expressed on the surface of almost all B-cell leukemias and lymphomas.
Noting that the FDA had rejected its previous proposal last year to voluntarily withdraw Makena from the U.S. market, Covis Pharma BV is again offering to voluntarily withdraw the drug, which is the only drug approved to reduce the risk of preterm birth. Along with its offer, the company asked the agency “to allow for an orderly wind-down that would best serve the interests of the patients,” according to a March 6 letter from Covis’ attorney to FDA Commissioner Robert Califf and Namandjé Bumpus, the agency’s chief scientist.
Shares of Veru Inc. hit a 52-week low March 3 after the U.S. FDA declined to grant an emergency use authorization (EUA) for sabizabulin for use in hospitalized adults with moderate to severe COVID-19 who are at high risk for acute respiratory distress syndrome. The decision comes as little surprise, given the negative advisory panel vote in November, but the agency’s wording might suggest potential use for the microtubule disruptor in the future.
The U.S. development path for rare disease treatments is strewn with numerous challenges, not least of which are the regulatory hurdles. For companies developing promising candidates to treat ultra-rare diseases and the patients who are running out of time, the regulatory obstacles in the U.S. may seem almost insurmountable. And new concerns about drug development in general could make those barriers even higher.
Although the U.S. FDA’s Vaccines and Related Biological Products Advisory Committee (VRBPAC) voted unanimously, 12-0, March 1 that the data GSK plc presented was adequate to support the safety of its respiratory syncytial virus vaccine, several panelists cautioned the FDA against viewing the vote as a recommendation to license the vaccine before more data are available.
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