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Wire · opportunities

FDA Places New Clinical Hold On RGX-121 for Hunter Syndrome

25 August 2026 · By · Wire by Fusion42

Published

25 August 2026

Topic

opportunities

◆ Sectors

Biotech

◆ Geography

United States

◆ Source

Read at cgtlive.com →

◆ Verified

Fusion42 · 26 August 2026 · Fusion42 review

The FDA has placed a new clinical hold on REGENXBIO's RGX-121 gene therapy for Hunter syndrome following detection of asymptomatic spine MRI abnormalities in five trial participants, marking the second regulatory setback for the therapy in 2026.

This Wire brief sits within Fusion42's coverage of Biotech, and 2 sources have reported it between 24 Aug 2026 and 25 Aug 2026.

◆ ◆ The Wire takeaway

You face a tougher regulatory environment for Hunter syndrome gene therapies after recurring FDA holds. Accelerate alternative programs or pivot clinical efforts to maintain momentum amid delays.

◆ Coverage

2 sources · first reported 24 Aug 2026 · latest 25 Aug 2026

◆ Related on Wire

◆ Topics

Biotechgene-therapyclinical-holdregulatory-setbackhunter-syndromeFDA