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.
- liver X receptor beta agonist RGX-104
An orally bioavailable agonist of the nuclear receptor liver X receptor beta (LXRbeta; NR1H2; LXR-b), with potential immunomodulating and antineoplastic activities. Upon oral administration, LXRbeta agonist RGX-104 selectively targets and binds to LXRbeta, thereby activating LXRbeta-mediated signaling, leading to the transcription of certain tumor suppressor genes and the downregulation of certain tumor promoter genes. This particularly activates the expression of apolipoprotein E (ApoE), a tumor suppressor protein, in tumor cells and certain immune cells. This activates the innate immune system, resulting in depletion of immunosuppressive myeloid-derived suppressor cells (MDSCs), tumor cells and endothelial cells in the tumor microenvironment. This reverses immune evasion, enhances anti-tumor immune responses and inhibits proliferation of tumor cells. LXRbeta, a member of the oxysterol receptor family, which is in the nuclear receptor family of transcription factors, plays a key role in cholesterol transport, glucose metabolism and the modulation of inflammatory responses; activation of LXRbeta suppresses tumor cell invasion, angiogenesis, tumor progression, and metastasis in a variety of tumor cell types. The expression of the ApoE protein becomes silenced in human cancers as they grow, become invasive, and metastasize; ApoE silencing is related to reduced survival in cancer patients. The LXR-ApoE pathway regulates the ability of cancers to evade the immune system and recruit blood vessels. Check for active clinical trials using this agent. (NCI Thesaurus)
Synonym: LXR-b agonist RGX-104 Code name: RGX 104