Eisai and Biogen announced that the U.S. Food and Drug Administration has accepted Eisai’s supplemental Biologics License Application, or sBLA, for LEQEMBI 100 mg/mL injection for intravenous use, supporting the conversion of the accelerated approval of LEQEMBI to a traditional approval. The LEQEMBI application has been granted Priority Review, with a Prescription Drug User Fee Act action date of July 6, 2023. The FDA is currently planning to hold an Advisory Committee to discuss this application but has not yet publicly announced the date of the meeting. LEQEMBI is a humanized immunoglobulin gamma 1 monoclonal antibody directed against aggregated soluble and insoluble forms of amyloid beta, approved under the Accelerated Approval Pathway for the treatment of Alzheimer’s Disease on January 6, 2023. Treatment with LEQEMBI should only be initiated in patients with the mild cognitive impairment or mild dementia stage of disease and confirmed presence of Abeta pathology. On the same day that LEQEMBI received its accelerated approval, Eisai submitted the sBLA to the FDA for approval under the traditional pathway. The sBLA is based on the findings from Eisai’s recently published large, global confirmatory Phase 3 clinical trial, Clarity AD. LEQEMBI met the primary endpoint and all key secondary endpoints with highly statistically significant results. I LEQEMBI was approved under accelerated approval in the U.S. and was launched in the U.S. on January 18, 2023. The accelerated approval was based on Phase 2 data that demonstrated that LEQEMBI reduced the accumulation of Abeta plaque in the brain, a defining feature of AD, and its continued approval may be contingent upon verification of LEQEMBI’s clinical benefit in a confirmatory trial. The FDA has determined that the results of Clarity AD can serve as the confirmatory study to verify the clinical benefit of lecanemab.
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