SLN-140 (Silence Therapeutics plc) is a novel small interfering RNA (siRNA) targeting protein S for the treatment of hemophilia A (HA). Researchers from the University of Bern recently presented data from studies conducted in animal models of HA, performed to evaluate the safety and efficacy of SLN-140.
After winning the backing of European regulators, Biomarin Pharmaceutical Inc. is returning to the U.S. FDA with its hemophilia A gene therapy, valoctocogene roxaparvovec, following a rejection in August 2020. It's armed with data it hopes will assuage concerns about long-term safety and benefits.
The first gene therapy to treat severe hemophilia A was among the drugs recommended for European approval by regulators from the EMA’s CHMP at its monthly meeting. Manufactured by Biomarin Pharmaceutical Inc., Roctavian (valoctocogene roxaparvovec) was recommended for conditional marketing authorization in the EU for severe hemophilia A in adults who do not have factor VIII inhibitors and no antibodies to adeno-associated virus serotype 5.
Partners Sanofi SA and Swedish Orphan Biovitrum AB (Sobi) said regulatory submissions are expected this year for once-weekly factor VIII therapy efanesoctocog alfa in hemophilia A following top-line success in a pivotal phase III study, which showed a clinically meaningful prevention of bleeds in people with severe disease receiving prophylaxis over 52 weeks. The drug, also known as BIVV-001, has fast track and orphan designations in the U.S., and the companies are banking on its extended half-life to go up against blockbuster bispecific antibody Hemlibra (emicizumab) from Roche Holding AG as well as a potential gene therapy from Biomarin Pharmaceutical Inc.
Having unveiled more data from the ongoing, global phase III Gener8-1 study with Roctavian (valoctocogene roxaparvovec, also known as valrox), Biomarin Pharmaceutical Inc. remains on track to file a regulatory submission with the FDA in the second quarter of this year for the gene therapy to treat adults with severe hemophilia A. The EMA is already reviewing a marketing authorization application.
Poseida Therapeutics Inc.’s R&D Day in February – where much of its technology was made public for the first time – created “a flood of interest” in deals and officials were “pretty selective,” said CEO Eric Ostertag, whose remarks came as the company nailed down a whopping research collaboration and exclusive license agreement with Takeda Pharmaceutical Co. Ltd. The arrangement will deploy Poseida’s Piggybac and Cas-CLOVER, as well as biodegradable DNA and RNA nanoparticle delivery technology and other genetic engineering platforms to come up with as many as eight gene therapies.
Sinocelltech Group Ltd. won market approval from China’s NMPA for SCT-800, a B-domain deleted recombinant human coagulation factor VIII, for the prophylactic treatment of severe hemophilia A in adolescent and adult patients. This marks the first homegrown drug for treating hemophilia A in China.
Officials at Sigilon Therapeutics Inc. declined to comment beyond a press release on the FDA’s clinical hold for the phase I/II study with encapsulated cell therapy SIG-001 for severe or moderately severe hemophilia A. Shares of Cambridge, Mass.-based Sigilon (NASDAQ:SGTX) closed at $6.90 on July 9, down $2.34, or 25% after Wall Street learned of the regulatory move, which came because one of three patients treated has developed inhibitors to factor VIII (FVIII).
At the recent 39th J.P. Morgan Healthcare Conference, Biomarin Pharmaceutical Inc. popped the lid off top-line results from its ongoing phase III GENEr8-1 study with valoctocogene roxaparvovec – also known as valrox, now commonly called Roctavian. Data, though encouraging, may not have quelled controversy around the prospect.
