NCI Drug Dictionary

The NCI Drug Dictionary contains technical definitions and synonyms for drugs/agents used to treat patients with cancer or conditions related to cancer. Each drug entry includes links to check for clinical trials listed in NCI's List of Cancer Clinical Trials.

ruxolitinib phosphate
Patient Information
The phosphate salt form of ruxolitinib, an orally bioavailable Janus-associated kinase (JAK) inhibitor with potential antineoplastic and immunomodulating activities. Ruxolitinib specifically binds to and inhibits protein tyrosine kinases JAK 1 and 2, which may lead to a reduction in inflammation and an inhibition of cellular proliferation. The JAK-STAT (signal transducer and activator of transcription) pathway plays a key role in the signaling of many cytokines and growth factors and is involved in cellular proliferation, growth, hematopoiesis, and the immune response; JAK kinases may be upregulated in inflammatory diseases, myeloproliferative disorders, and various malignancies. Check for active clinical trials using this agent. (NCI Thesaurus)

Synonym:INCB-18424 phosphate
oral JAK inhibitor INCB18424
oral Janus-associated kinase inhibitor INCB18424
US brand name:Jakafi
Code name:INCB18424
Chemical structure:
  • (3R)-3-cyclopentyl-3-(4-(7h-pyrrolo(2,3-d)pyrimidin-4-yl)pyrazol-1-yl)propanenitrile phosphate (1:1)
  • 1H-pyrazole-1-propanenitrile, beta-cyclopentyl-4-(7H-pyrrolo(2,3-d)pyrimidin-4-yl)-,(betaR)-, phosphate (1:1)