Why Early QC Planning Matters in Cell and Gene Therapy
Late-stage CMC setbacks often begin with early QC decisions that shape cell and gene therapy timelines, costs, and regulatory outcomes
By
Laurent Claisse
June 30, 2026
1
Manufacturing or quality deficiencies accounted for 74% of Complete Response Letters issued by the FDA from 2020 to 2024.
2
Three high-profile cell and gene therapy programs faced delays or rejections in 2025 due to Chemistry, Manufacturing, and Control-related issues.
3
Early development decisions in gene therapy have significant downstream consequences, as emphasized by FDA guidance on CMC.
4
A cohesive QC strategy is essential, as it cannot be redesigned at each development stage without risking compliance and efficiency.
5
Geographical considerations in quality strategy are crucial, as operational habits can lead to documentation inconsistencies across regions.