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CDX-527

Bispecific antibody · Immune activation, directed at Programmed cell death 1 ligand 1 (CD274) and CD27 molecule (CD27) · developed by Celldex Therapeutics

Phase 1 Most advanced trial (none active)
CLDX Developer
1 Registered trials

What is CDX-527?

CDX-527 is a bispecific antibody that binds PD-L1 on tumor cells and CD27 on immune cells, including most T-lymphocytes. It blocks PD-L1 binding to PD-1 while stimulating CD27 signaling to enhance T-cell activation and cytotoxic T-lymphocyte responses. It is being studied in multiple solid tumors, including non-small cell lung, breast, gastric, renal cell, ovarian and head and neck cancers.

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

At a glance

Drug type
Bispecific antibody
Targets
Programmed cell death 1 ligand 1 (CD274), CD27 molecule (CD27), Programmed cell death protein 1 (PDCD1) (binding partner it blocks)
Mechanism
Immune activation, directed at Programmed cell death 1 ligand 1 (CD274) and CD27 molecule (CD27)
Pathways
PD-1 signaling, CD27-mediated T-cell co-stimulation, CTL-mediated antitumor immune response, NK cell cytolytic activity
Therapy area
Oncology
Developer
Celldex Therapeutics (CLDX)
FDA status
Investigational, not approved in the US. Most advanced trial: Phase 1

🧪 Clinical trials

TrialPhaseConditionStatusSponsor
NCT04440943 Phase 1 Non-small Cell Lung Cancer Completed CLDX

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

Conditions studied

Bladder Urothelial CarcinomaBreast CancerCholangiocarcinomaEsophageal CancerFallopian Tube CancerGastric CancerHead and Neck CancerHepatic CancerMSI-H Colorectal CancerNon-small Cell Lung CancerOther Solid TumorsOvarian CancerPrimary Peritoneal CarcinomaRenal Cell Carcinoma

Other drugs acting on CD274 / CD27

More from Celldex Therapeutics

Sources

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