Research
The gene therapy market is projected to reach $5.1 billion by 2025, with in vivo gene therapy holding a 42.5% market share. This growth is driven by the adoption of AAV-based vectors for treating various rare diseases, particularly in neurological and musculoskeletal conditions.
In Vivo Gene Therapy commanded the largest share at 42.5% in 2025, translating to approximately $5.1 billion in revenue, driven by the widespread adoption of AAV-based vectors for direct patient administration across neurological, hepatic, ocular, and musculoskeletal rare diseases. In vivo approaches are preferred for conditions where target cells are difficult to remove and return, such as CNS disorders ... In Vivo Gene Therapy commanded the largest share at 42.5% in 2025, translating to approximately $5.1 billion in revenue, driven by the widespread adoption of AAV-based vectors for direct patient administration across neurological, hepatic, ocular, and musculoskeletal rare diseases. In vivo approaches are preferred for conditions where target cells are difficult to remove and return, such as CNS disorders and dystrophinopathies, and the continued refinement of AAV serotypes for diverse tissue tropisms is sustaining this segment's leadership. The CNS delivery challenge — historically a significant technical barrier — is being addressed through novel AAV capsids with enhanced brain penetration, intrathecal delivery methods, and MRI-guided focused ultrasound techniques for blood-brain barrier opening, all of which are meaningfully expanding the addressable neurological rare disease opportunity. Hematological Disorders represented the second-largest disease area with 28.7% market share in 2025, driven by the commercial maturity and clinical efficacy demonstrated in hemophilia A and B, beta-thalassemia, and sickle cell disease — the latter benefiting from both gene therapy and gene editing approaches. The most commonly targeted rare diseases in the gene therapy market include spinal muscular atrophy (SMA, addressed by Zolgensma), hemophilia A and B, Duchenne muscular dystrophy (DMD, addressed by Elevidys), sickle cell disease and beta-thalassemia (addressed by Casgevy and Zynteglo), RPE65-associated retinal dystrophy (addressed by Luxturna), and various lysosomal storage disorders. CRISPR technology has become a transformational force in the rare disease gene therapy market, with the 2023-2024 approval of Casgevy marking the world's first CRISPR-based medicine for sickle cell disease and beta-thalassemia. The CRISPR gene therapy sub-segment is projected to grow at 24.8% CAGR through 2034 and could address 15-20 distinct rare diseases by 2030. Next-generation CRISPR variants including base editors and prime editors are entering clinical trials for conditions such as progeria, phenylketonuria, and various forms of inherited blindness.
Original title: “Gene Therapy Rare Disease Market Research Report 2034”