Otsuka tops Vera with kidney drug data; Regenxbio sinks on Duchenne update
Today, a brief rundown of news involving Otsuka Pharmaceutical and Arvinas, as well as updates from Regenxbio, Vigil Neuroscience and Sagimet Biosciences that you may have missed.
Vera Therapeutics lost nearly a third of its market value Friday after Otsuka Pharmaceutical presented late-stage study data on a rival drug it's developing for the kidney disease IgA nephropathy. At a medical meeting, Otsuka said its therapy, sibeprenlimab, led to a 51% reduction in proteinuria, a key marker of kidney health, after nine months of treatment. Though cross-trial comparisons can be misleading, Vera's therapy led to a 42% reduction in proteinuria compared to placebo at a similar timepoint in its own Phase 3 study, causing investors to sell off company shares. Still, some analysts defended Vera. Jefferies' Farzin Haque cautioned not to 'overinterpret the data' and argued the two datasets 'are not clinically or statistically different for commercial uptake.' The Food and Drug Administration could approve Otsuka's drug by Nov. 28. On Monday, Vera said it intends to file an accelerated approval application in the fourth quarter. — Ben Fidler
Arvinas and partner Pfizer have filed for a U.S. approval of their experimental protein-degrading drug for breast cancer, Arvinas said Friday. The two submitted the therapy, vepdegestrant, for use in people with estrogen-receptor positive, HER2 negative breast cancer and a mutation in the ESR1 gene. The application is based on Phase 3 data presented at the American Society of Clinical Oncology meeting this week showing the drug held tumors in check longer than a standard treatment. That benefit was modest, however, and wasn't observed in the overall study population. — Delilah Alvarado
Regenxbio released new data Thursday showing a potential impact on muscle function among Duchenne muscular dystrophy patients who received its experimental gene therapy in an early-stage clinical trial. Regenxbio said those given the dose it's using in pivotal testing outperformed how historical data suggests they might on multiple widely used assessments of functional benefits. Still, shares fell by double digits, as some key information was missing from the update, the treatment's effects appear to be 'plateauing' and there is concern the data may not be strong enough to support an accelerated approval, wrote Jefferies analyst Maury Raycroft. Regenxbio expects to report pivotal data next year and has said it intends to seek a speedy approval afterwards, based on the therapy's ability to produce a tiny version of a muscle-protecting protein. — Ben Fidler
Vigil Neuroscience reported Wednesday the failure of a mid-stage trial meant to prove its most advanced drug works as intended. The study enrolled 20 people with 'ALSP,' a rare disorder hallmarked by the erosion of white matter in the brain. All participants received Vigil's drug, VGL101, which is designed to boost the TREM2 proteins that help control inflammation in the brain. The company said that while showing favorable safety and tolerability, its treatment had no beneficial effects on important markers of effectiveness or biological activity. As such, a separate, so-called long-term extension study is being discontinued. Sanofi is in the process of acquiring Vigil for access to a different TREM2-targeting medicine. Per terms of that deal, rights to VGL101 will be returned to its original licensor, Amgen. — Jacob Bell
Shares of Sagimet Biosciences have climbed nearly 40% since partner Ascletis Bioscience on Wednesday reported the company's drug denifanstat succeeded in a Phase 3 trial in China in people with moderate-to-severe acne. The drug produced 'compelling efficacy' in the trial with only mild-to-moderate side effects, which could have positive implications for its ability to treat metabolic dysfunction-associated steatohepatitis, Leerink Partners analyst Thomas Smith wrote in a research note. A 2019 partnership handed Ascletis rights in greater China to denifanstat. Sagimet could receive up to $122 million in future payments, as well as sales royalties, if the drug is approved. — Ben Fidler
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Boston Globe
20 hours ago
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Sarepta tells FDA it won't halt shipments despite patient deaths
Get Starting Point A guide through the most important stories of the morning, delivered Monday through Friday. Enter Email Sign Up 'We believe in access to drugs for unmet medical needs but are not afraid to take immediate action when a serious safety signal emerges,' FDA Commissioner Marty Makary said in a statement. Advertisement Elevidys is the first gene therapy approved in the U.S. for Duchenne's muscular dystrophy, the fatal muscle-wasting disease that affects males, though it has faced scrutiny since its clearance in 2023. The one-time treatment received accelerated approval against the recommendations of some FDA scientists who doubted its effectiveness. Bloomberg The FDA granted full approval last year and expanded the therapy's use to patients 4 years and older, including those who can no longer walk. Previously, it was only available for younger patients who were still walking. Advertisement Sarepta said Friday that its scientific review showed 'no new or changed safety signals' for younger patients with Duchenne's who have earlier stages of the disease. The company said it plans to keep the drug available for those patients. 'We look forward to continued discussions and sharing of information with FDA,' the company said in a statement. Sarepta halted shipments last month of the therapy for older boys with Duchenne's, which gradually destroys muscle and skeletal strength, resulting in early death. The move followed the deaths of two teenage boys taking the therapy. The company also confirmed a third death Friday: a 51-year-old patient who was taking an experimental gene therapy in a trial for a different form of muscular dystrophy. Sarepta said it reported the death to the FDA on June 20. The FDA said Friday it placed that trial on hold. Sarepta noted that the gene therapy involved in the incident uses 'a different dose and is manufactured using a different process,' than Elevidys. All three patient deaths were linked to liver injury, a side effect noted in Sarepta's prescribing information. Earlier this week Sarepta announced it would add a bold warning to drug and lay off a third of its employees. The company did not mention the third patient death in its news release or conference call announcing those changes, sparking pointed criticism from Wall Street analysts. Company shares fell more than 35% Friday to close at $14.07. Cambridge, Massachusetts-based Sarepta has received FDA approval for three other Duchenne's drugs since 2016, none of which have been confirmed to work. The company has long been criticized for failing to complete several studies needed to secure full FDA approval of its drugs. Advertisement
The Hill
21 hours ago
- The Hill
Gene therapy maker Sarepta tells FDA it won't halt shipments despite patient deaths
WASHINGTON (AP) — Drugmaker Sarepta Therapeutics said late Friday it won't comply with a request from the Food and Drug Administration to halt all shipments of its gene therapy following the death of a third patient receiving one of its treatments for muscular dystrophy. The highly unusual move is a latest in a string of events that have hammered the company's stock for weeks and recently forced it to lay off 500 employees. The company's decision not to comply with the FDA also places future availability of its leading therapy, called Elevidys, in doubt. The FDA said in a statement Friday night that officials met with Sarepta and requested it suspend all sales but 'the company refused to do so.' The agency has the authority to pull drugs from the market, but the cumbersome regulatory process can take months or even years. Instead, the agency usually makes an informal request and companies almost always comply. 'We believe in access to drugs for unmet medical needs but are not afraid to take immediate action when a serious safety signal emerges,' FDA Commissioner Marty Makary said in a statement. Elevidys is the first gene therapy approved in the U.S. for Duchenne's muscular dystrophy, the fatal muscle-wasting disease that affects males, though it has faced scrutiny since its clearance in 2023. The one-time treatment received accelerated approval against the recommendations of some FDA scientists who doubted its effectiveness. The FDA granted full approval last year and expanded the therapy's use to patients 4 years and older, including those who can no longer walk. Previously, it was only available for younger patients who were still walking. Sarepta said Friday that its scientific review showed 'no new or changed safety signals' for younger patients with Duchenne's who have earlier stages of the disease. The company said it plans to keep the drug available for those patients. 'We look forward to continued discussions and sharing of information with FDA,' the company said in a statement. Sarepta halted shipments last month of the therapy for older boys with Duchenne's, which gradually destroys muscle and skeletal strength, resulting in early death. The move followed the deaths of two teenage boys taking the therapy. The company also confirmed a third death Friday: a 51-year-old patient who was taking an experimental gene therapy in a trial for a different form of muscular dystrophy. Sarepta said it reported the death to the FDA on June 20. The FDA said Friday it placed that trial on hold. Sarepta noted that the gene therapy involved in the incident uses 'a different dose and is manufactured using a different process,' than Elevidys. All three patient deaths were linked to liver injury, a side effect noted in Sarepta's prescribing information. Earlier this week Sarepta announced it would add a bold warning to drug and lay off a third of its employees. The company did not mention the third patient death in its news release or conference call announcing those changes, sparking pointed criticism from Wall Street analysts. Company shares fell more than 35% Friday to close at $14.07. Cambridge, Massachusetts-based Sarepta has received FDA approval for three other Duchenne's drugs since 2016, none of which have been confirmed to work. The company has long been criticized for failing to complete several studies needed to secure full FDA approval of its drugs. ___ The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute's Department of Science Education and the Robert Wood Johnson Foundation. The AP is solely responsible for all content.
