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GB1275

Small molecule · Agonist of CD11b (ITGAM) · developed by GB006, Inc., a wholly owned subsidiary of Gossamer Bio

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

What is GB1275?

GB1275 is an orally bioavailable small molecule agonist of CD11b (ITGAM) that activates CD11b-mediated signaling to promote pro-inflammatory macrophage polarization and suppress immunosuppressive macrophage polarization. It reduces tumor-associated macrophages and myeloid-derived suppressor cells in the tumor microenvironment, promoting anti-tumor immune responses. It is studied in multiple solid tumors including pancreatic, esophageal, gastric, breast, prostate, colorectal, lung, head and neck, urothelial, renal, and hepatocellular cancers.

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

At a glance

Also known as
Investigational
Drug type
Small molecule
Targets
CD11b (ITGAM)
Mechanism
Agonist of CD11b (ITGAM)
Pathways
macrophage polarization, anti-tumor immune response, myeloid-derived suppressor cell reduction
Therapy area
Oncology
Developer
GB006, Inc., a wholly owned subsidiary of Gossamer Bio, Inc. (GOSS)
FDA status
Investigational, not approved in the US. Most advanced trial: Phase 1

🧪 Clinical trials

TrialPhaseConditionStatusSponsor
NCT04060342 Phase 1 Pancreatic Adenocarcinoma Terminated GOSS

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

Conditions studied

Castration-resistant Prostate CancerEsophageal AdenocarcinomaEsophageal Squamous Cell CarcinomaGastric AdenocarcinomaGastroesophageal Junction AdenocarcinomaHead and Neck Squamous Cell CarcinomaHepatocellular CarcinomaMicrosatellite Stable Colorectal CancerNon-small Cell Lung CancerPancreatic AdenocarcinomaRenal Cell CarcinomaSmall-cell Lung CancerTriple Negative Breast CancerUrothelial Carcinoma

Other drugs acting on ITGAM

More from GB006, Inc., a wholly owned subsidiary of Gossamer Bio

Sources

Updated Oct 3, 2026. Something wrong or missing? Report it on the GOSS 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.