Pfizer's Inclacumab Fails Phase III Trial for Sickle Cell Disease, Marking Second Setback from Global Blood Therapeutics Acquisition
Key Insights
Pfizer's investigational P-selectin inhibitor inclacumab failed to meet its primary endpoint of reducing vaso-occlusive crises in a Phase III trial for sickle cell disease.
The 48-week THRIVE-131 study enrolled 241 participants aged 16 and older but showed no significant difference in VOC rates compared to placebo.
This represents the second major disappointment from Pfizer's $5.4 billion acquisition of Global Blood Therapeutics, following Oxbryta's market withdrawal in 2024.
PfizerView company profile announced disappointing results from its Phase III THRIVE-131 study evaluating inclacumabSearch drug, an investigational P-selectinSearch term inhibitor for sickle cell diseaseSearch disease (SCD), marking another significant setback in the company's efforts to address this debilitating condition. The monoclonal antibody failed to achieve its primary endpoint of significantly reducing vaso-occlusive crisesSearch disease (VOCs) in patients with SCD.
Study Design and Results
The THRIVE-131 trial was conducted as a randomized, double-blind, placebo-controlled study over 48 weeks, enrolling 241 participants aged 16 years and older with SCD. Patients selected for the study had experienced between two to ten VOCs within the previous year. Participants were randomly assigned to receive either inclacumabSearch drug or placebo every 12 weeks throughout the study duration.
The trial's primary endpoint measured the rate of VOCs in patients receiving inclacumabSearch drug compared to those receiving placebo. However, results showed no significant difference in VOC rates between participants receiving the investigational treatment and those receiving placebo.
Company Response and Commitment
Michael Vincent, M.D., Ph.D., chief inflammation & immunology officer at PfizerView company profile, acknowledged the disappointing outcome. "We recognize this news is disappointing for the sickle cell community, and we share their disappointment," Vincent stated. "While the THRIVE-131 results did not meet our expectations, we remain committed to better understanding these results and sharing them with the medical and sickle cell community in the interest of advancing our collective understanding of sickle cell diseaseSearch disease."
Vincent emphasized PfizerView company profile's continued dedication to the therapeutic area, adding, "We remain focused on our mission of bringing much-needed treatments to patients with sickle cell diseaseSearch disease. We are deeply grateful to the participants and investigators for their contributions to this important work. Their efforts are invaluable in informing future sickle cell research."
Impact on Global Blood Therapeutics Acquisition
The inclacumabSearch drug failure represents the second major disappointment from PfizerView company profile's $5.4 billion acquisition of Global Blood TherapeuticsSearch company in 2022. The acquisition was headlined by OxbrytaSearch drug, which was subsequently withdrawn from the market in September 2024, significantly impacting the deal's outlook.
BMO Capital Markets analyst Evan Seigerman commented on the cumulative impact of these setbacks, noting, "PfizerView company profile's acquisition of Global Blood has proven disappointing with inclacumabSearch drug's failure coming after OxbrytaSearch drug's 2024 withdrawal from all approved markets."
Future Directions
Despite these challenges, PfizerView company profile has stated its continued commitment to developing treatments for sickle cell diseaseSearch disease. The company indicated it will pursue next steps in expanding its SCD treatment portfolio, including continued work with OxbrytaSearch drug and osivelotorSearch drug, as it seeks to address the significant unmet medical needs of patients living with this chronic condition.