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.

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PI3K delta inhibitor HMPL 689
An orally bioavailable selective inhibitor of the delta isoform of phosphatidylinositide 3-kinase (phosphoinositide 3'-kinase delta; PI3Kd; PI3K-d), with potential antineoplastic activity. Upon oral administration, PI3K-delta inhibitor HMPL 689 selectively binds to and inhibits PI3Kd, and prevents the activation of the PI3Kd/AKT signaling pathway, and B-cell activation. This both decreases proliferation and induces cell death in PI3Kd-overexpressing tumor cells. PI3Kd plays a key role in the B-cell receptor (BCR) signaling pathway and the proliferation of hematologic cancer cells. The targeted inhibition of PI3Kd is designed to preserve PI3K signaling in normal, non-neoplastic cells and thereby to minimize serious side effects. PI3Kd, an enzyme often overexpressed in cancer cells, plays a crucial role in tumor cell regulation and survival. Check for active clinical trials using this agent. (NCI Thesaurus)

Synonym:PI3K-d inhibitor HMPL 689
Code name:HMPL 689
HMPL689
HMPL-689