Amgen Receives FDA Breakthrough Therapy Designation for Investigational BiTE Antibody Blinatumomab
Amgen has announced that FDA has granted Breakthrough Therapy Designation to investigational bispecific T cell engager (BiTE) antibody blinatumomab, for adults with Philadelphia-negative (Ph-) relapsed/refractory B-precursor acute lymphoblastic leukemia (ALL), a rapidly progressing cancer of the blood and bone marrow.[1]
The Breakthrough Therapy Designation was based on the results of a Phase II trial of 189 adult patients with Ph- relapsed/refractory B-precursor ALL treated with blinatumomab. Data from the Phase II trial were most recently presented at the 50th Annual Meeting of the American Society of Clinical Oncology (ASCO) and the 19th Congress of the European Hematology Association (EHA).
"There is a high unmet need for new medicines to treat relapsed and refractory ALL patients, who have very few treatment options," said Sean E. Harper, MD, executive vice president of Research and Development at Amgen. "The results from the Phase II trial evaluating blinatumomab in adult patients with relapsed or refractory ALL are encouraging and provide a strong basis for a regulatory filing later this year and potential approval in this serious disease."
The FDA states that Breakthrough Therapy Designation is intended to expedite the development and review of drugs for 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. A Breakthrough Therapy Designation conveys all of the fast-track program features, more intensive FDA guidance on an efficient drug development program, an organizational commitment involving senior managers, and eligibility for rolling review and priority review.[2]
In the US it is estimated that more than 6000 cases of ALL were diagnosed in 2013, and in the European Union, more than 7000 cases of ALL are diagnosed each year.[3,4] In adult patients with relapsed or refractory ALL, median overall survival is just 3–5 months.[5]
References
1. www.mayoclinic.com/health/acute-lymphocytic-leukemia/DS00558.
2. www.fda.gov/RegulatoryInformation/Legislation/FederalFoodDrugandCosmeticActFDCAct/SignificantAmendmentstotheFDCAct/FDASIA/ucm341027.htm.
3. Siegel R, Naishadham D, Jemal A. Cancer statistics, 2013. Ca Cancer J Clin. 2013;63:11-30.
4. Gatta G, Maarten van der Zwan J, Casali P, et. al. Rare cancers are not so rare: The rare cancer burden in Europe. Eur J Cancer. 2011;47:2493-2511.
5. Advani A.S. New immune strategies for the treatment of acute lymphoblastic leukemia: Antibodies and chimeric antigen receptors. Hematology Am Soc Hematol Educ Program. 2013;2013:131-7.
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