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Evorpacept · ALX-148

Fusion protein · Antagonist of CD47 · developed by ALX Oncology

Phase 2/3 Most advanced trial
ALXO Developer
5 Registered trials

What is Evorpacept?

Evorpacept is a fusion protein made of a high-affinity CD47 blocker, a variant of SIRPa, linked to an inactive immunoglobulin Fc region. It binds CD47 on tumor cells, blocking its interaction with SIRPa on phagocytic cells, which promotes macrophage phagocytosis of tumor cells and activates anti-tumor T-cell responses. It is studied in head and neck, gastric, ovarian and breast cancers.

Summary written with AI from the sources listed at the end of this page.

At a glance

Also known as
ALX-148
Drug type
Fusion protein
Targets
CD47, SIRPA (binding partner it blocks)
Mechanism
Antagonist of CD47
Pathways
CD47/SIRPa signaling, macrophage-mediated phagocytosis, calreticulin/LRP pro-phagocytic signaling, cytotoxic T-lymphocyte activation
Therapy area
Oncology
Developer
ALX Oncology Inc. (ALXO)
Also in trials of
JAZZ, RNAZ
FDA status
Investigational, not approved in the US. Most advanced trial: Phase 2/3
UNII
X7K762X1IJ

🧪 Clinical trials

TrialPhaseConditionStatusSponsor
NCT05002127 Phase 2/3 Gastric Cancer Active not recruiting ALXO
NCT05467670 Phase 2 Ovarian Cancer Active not recruiting ALXO
NCT05868226 Phase 1/2 HER2-positive Breast Cancer Recruiting JAZZ
NCT05027139 Phase 1/2 HER2-expressing Cancers Completed JAZZ
NCT04675294 Phase 2 Head and Neck Cancer Active not recruiting ALXO

Trials of the companies BioRadar tracks, from ClinicalTrials.gov, most advanced phase first.

Conditions studied

Gastric AdenocarcinomaGastric CancerGastroesophageal Junction AdenocarcinomaHead and Neck CancerHead and Neck Squamous Cell CarcinomaHER-2 Protein OverexpressionHER2 Mutation-Related TumorsHER2-negative Breast CancerHER2-positive Breast CancerHER2-positive Metastatic Breast CancerMetastaticMetastatic Breast CancerMetastatic CancerOvarian Cancer

Other drugs acting on CD47

More from ALX Oncology

Sources

Updated Oct 11, 2026. Something wrong or missing? Report it on the ALXO page.

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Data: FDA (Drugs@FDA, Purple Book, DailyMed), NIH (NCI Thesaurus, GSRS, RxNorm), ClinicalTrials.gov • Informational purposes only, not medical or investment advice. • All drugs A–Z

This data is for informational purposes only, not investment advice. BioRadar does not provide buy/sell recommendations. Past performance does not guarantee future results. Always do your own due diligence.