Gene editing technologies are moving forward in preclinical development with innovative strategies designed to treat diseases at their root and even reverse them.
Gene editing technologies are moving forward in preclinical development with innovative strategies designed to treat diseases at their root and even reverse them. However, many approaches still struggle to reach target cells or tissues – either they fail to arrive, or their efficacy is low. In vivo therapies face numerous challenges, but despite these hurdles, 2025 has marked a year of remarkable progress.
Gene editing technologies are moving forward in preclinical development with innovative strategies designed to treat diseases at their root and even reverse them. However, many approaches still struggle to reach target cells or tissues – either they fail to arrive, or their efficacy is low. In vivo therapies face numerous challenges, but despite these hurdles, 2025 has marked a year of remarkable progress.
Recent comments from CDER Director George Tidmarsh suggesting that the agency may be backing away from the use of its independent expert panels for individual product approvals seem to be supported by the numbers.
Representatives of patients’ groups, industry bodies and venture philanthropy funders are calling for a renewal of the U.K. Rare Diseases Framework, to put fresh momentum behind translational research and clinical trials, streamline regulatory oversight and improve access to therapies.
The realignment within the U.S. FDA continued with reports of the removal of two high level executives. When asked by BioWorld if the Center for Biologics Evaluation and Research’s (CBER) Office of Therapeutic Products director and deputy director had been forced out and if so, why, an HHS spokesperson responded on background with a single sentence: “Center directors deserve to be supported by managers that are aligned with aggressive goals to expeditiously advance therapeutics for rare diseases using the gold standard of science.”
Children with solid tumors who relapse are being treated with the same chemotherapy they would have been given 40 years ago, as “there have been no major approvals for pediatric solid tumors,” Catherine Bollard, senior vice president and chief research officer at Children’s National Hospital, said at a June 5 FDA roundtable on cell and gene therapies (CGTs). The problem isn’t the science. Bollard said many groups are working on curative CGTs “for these children who have lost all other hope for survival.” The real gap is that “big pharma doesn’t see the business model because it’s a rare disease,” she added.
Developing a therapy for an ultra-rare condition has its challenges, including finding enough patients for clinical enrollment and convincing regulatory authorities that limited data prove the candidate is safe and effective. For that reason, Stealth Biotherapeutics Inc. has faced numerous roadblocks getting its mitochondria-targeting elamipretide across the finish line for Barth syndrome, a condition that affects about 230 to 250 males worldwide, including fewer than 150 in the U.S.
Just two months after Inozyme Pharma Inc. cut its workforce by 25% and prioritized activities to focus on a BLA filing for INZ-701 for ENPP1 deficiency, interim phase III data from its Energy 3 trial showed consistent safety and immunogenicity and increased phosphate levels in patients treated with the rare disease enzyme replacement therapy.
Barely a year after the U.S. FDA shackled Abeona Therapeutics Inc.’s cell-based gene therapy with a complete response letter, the agency has approved it for treating a rare and genetic skin disease. Zevaskyn (prademagene zamikeracel), for treating wounds in adult and pediatric patients with recessive dystrophic epidermolysis bullosa, will be priced in the U.S. at $3.1 million.
