1. Pink Sheet
  2. >>Advanced Technologies
  3. >>Cell & Gene Therapies

US FDA Tweaks Guidance On Sameness Of Gene Therapies, But Questions Remain

 
• By Brenda Sandburg

In response to industry input, the agency made a few changes to its draft guidance but several issues remain uncertain, such as what constitutes ‘minor differences’ between gene therapy products.

US FDA guidance notes when gene therapy products will be deemed to be the same for orphan designation • Source: Alamy

At the request of stakeholders, the US Food and Drug Administration has added a bit more clarity on when it will consider gene therapy products to be the same for the purposes of determining an orphan drug designation or orphan exclusivity. But its final guidance still leaves unresolved questions about what may constitute “minor differences” between products.

The agency issued the guidance, “Interpreting Sameness of Gene Therapy Products Under the Orphan Drug Regulations,” on 29 September. The six-page document is very similar to the draft guidance issued in January 2020

Read the full article – start your free trial today!

Join thousands of industry professionals who rely on Pink Sheet for daily insights

  • Start your 7-day free trial
  • Explore trusted news, analysis, and insights
  • Access comprehensive global coverage
  • Enjoy instant access – no credit card required
Start Free Trial

Already a subscriber?

More from Cell & Gene Therapies

Tougher Approval Standards May Follow Vinay Prasad’s Appointment To Lead US FDA’s CBER

 
• By Sarah Karlin-Smith

Industry is concerned that Prasad may make regulatory flexibility tougher to obtain for cell and gene therapy, while vaccine and public health advocates are angry about Prasad’s criticisms of US COVID-19 policies.

Sponsors Like START Rare Disease Pilot, Will Prasad Maintain Its Momentum?

 
• By Kate Rawson

Sponsors reported faster development times for products that joined the pilot program intended to speed rare disease treatments in CBER.

Potency Assay Issues Delayed US FDA Approval Of Mesoblast’s Ryoncil For Years

 
• By Sue Sutter

The company’s failure to show its potency assays measured attributes directly related to the mesenchymal stromal cell product’s therapeutic effect highlights the importance of a robust CMC program for complex cell therapies.

Mesoblast’s Ryoncil: US FDA Changed Its Mind On Need For A Randomized Trial

 
• By Sue Sutter

Agency staff repeatedly said the BLA based on a single-arm study in 55 patients lacked substantial evidence of effectiveness in steroid-refractory acute graft-versus-host disease and a randomized trial was needed, but changed course “based on additional consideration” after a second CRL.

More from Advanced Technologies

Potency Assay Issues Delayed US FDA Approval Of Mesoblast’s Ryoncil For Years

 
• By Sue Sutter

The company’s failure to show its potency assays measured attributes directly related to the mesenchymal stromal cell product’s therapeutic effect highlights the importance of a robust CMC program for complex cell therapies.

Mesoblast’s Ryoncil: US FDA Changed Its Mind On Need For A Randomized Trial

 
• By Sue Sutter

Agency staff repeatedly said the BLA based on a single-arm study in 55 patients lacked substantial evidence of effectiveness in steroid-refractory acute graft-versus-host disease and a randomized trial was needed, but changed course “based on additional consideration” after a second CRL.

Ryoncil Chronology: Three Review Cycles, Two CRLs, One Dispute Resolution Request

 
• By Sue Sutter

The Pink Sheet’s Drug Review Profile looks at the timeline for the clinical development and US FDA review of Mesoblast’s remestemcel for graft-versus-host disease.