New FDA Flexibility in Cell and Gene Therapy Approvals
A 5/5 FDA guidance on chemistry, manufacturing, and controls flexibilities for developing human cellular and gene therapy (CGT) products is changing the landscape of regulatory approval for such products. A BioProcess International online column analyzing the guidance, which is being implemented immediately, says FDA has abandoned its long-standing requirement for three commercial validation batches for therapies that, due to small patient populations or individualized manufacturing, might be produced in only a handful of lots over their lifetimes.
The guidance discusses 13 specific agency flexibility provisions arranged in four distinct areas:
- clinical development;
- process validation;
- commercial specifications; and
- additional provisions.
“Industry experts have welcomed the clarity provided by the final guidance,” the post says. “FDA acknowledged that it can be difficult for sponsors to create CGT products using traditional product development strategies…. The agency states in the guidance, ‘Consistent with the statutory and regulatory requirements for biological products, FDA uses a flexible approach to ensuring applicable CMC requirements are met for CGT products’ It says such an approach ‘serves to help expedite development, review, and patient access to safe and effective CGT products to treat serious or life-threatening conditions [with] significant unmet medical needs.’”
The column makes clear that although the guidance eliminates procedural rigidity, it explicitly introduces no concessions to the foundational pillars of FDA quality compliance. “Regulators have drawn a firm line,” it says, “flexibility in batch quantity does not equal flexibility in data integrity, patient safety, or product purity.”