Celgene Corporation and bluebird bio, Inc. announced that bb2121, a chimeric antigen receptor T-cell (CAR-T) therapy targeting b-cell maturation antigen (BCMA) in previously treated patients with multiple myeloma, has been granted Breakthrough Therapy Designation (BTD) by the U.S. Food and Drug Administration (FDA) and PRIority MEdicines (PRIME) eligibility by the European Medicines Agency (EMA).

BTD designation and PRIME eligibility for bb2121 were based on preliminary clinical data from the ongoing phase 1 study CRB-401. Updated data from CRB-401 is scheduled to be presented at the 59th annual meeting of the American Society of Hematology in Atlanta during an oral presentation on Dec. 11.

“Receiving Breakthrough Therapy Designation and PRIME eligibility for bb2121 further underscores the potential of this novel cellular immunotherapy approach to multiple myeloma treatment,” said Jay Backstrom, M.D., Chief Medical Officer and Head of Global Regulatory Affairs for Celgene. “We will work closely with these agencies as we accelerate development of bb2121, a novel technology and therapy for patients with multiple myeloma.”

“Despite recent advances, multiple myeloma remains an incurable disease, and heavily pretreated patients have limited therapeutic options,” said David Davidson, M.D., Chief Medical Officer for bluebird bio. “Early data suggest that treatment with bb2121 has the potential to induce durable responses in this patient population. It is encouraging for both the FDA and EMA to identify bb2121 as a candidate for accelerated development as we continue our work with Celgene to bring this therapy to patients in need of new options.”

Breakthrough Therapy Designation is intended to expedite the development and review of drugs that are intended to treat serious or life-threatening conditions. The criteria for breakthrough therapy designation require preliminary clinical evidence that demonstrates the drug may have substantial improvement on at least one clinically significant endpoint over available therapy.

PRIME is a program launched by the EMA to enhance support for the development of medicines that target an unmet medical need. This voluntary program is based on enhanced interaction and early dialogue with developers of promising medicines, to optimize development plans and speed up evaluation so these medicines can reach patients earlier. The program focuses on medicines that may offer a major therapeutic advantage over existing treatments, or benefit patients without treatment options. These medicines are considered priority medicines by EMA. To be accepted for PRIME, a medicine must show its potential to benefit patients with unmet medical needs based on early clinical data.