Clinical Trials

Multiple early-stage clinical trials have evaluated abequolixron (RGX-104) in oncology, focusing on advanced solid malignancies such as recurrent or metastatic non-small cell lung cancer and endometrial cancer. A completed Phase 1 trial sponsored by Inspirna, Inc., assessed RGX-104 as both monotherapy and combination therapy. Additionally, a pilot study sponsored by the UNC Lineberger Comprehensive Cancer Center explored abequolixron combined with chemo-immunotherapy for non-small cell lung cancer, though this trial was ultimately terminated.

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT02922764 COMPLETED
Endometrial Cancer; Endometrial Cancer Recurrent; Lung Cancer Recurrent; Lung Cancer; Non-small Cell Lung Cancer Metastatic; Non-small Cell Carcinoma
Inspirna, Inc.
2016-11-01 PHASE1
NCT05911308 TERMINATED
Non-Small Cell Lung Cancer
UNC Lineberger Comprehensive Cancer Center
2024-04-01 PHASE1

(data from https://clinicaltrials.gov, updated on 2025-03-26)

Check the Abequolixron (RGX-104) product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Compliance for Clinical Use

Mechanism and Biochemical Profile

Abequolixron acts as an orally bioavailable agonist of the liver X receptor, driving the transcriptional activation of apolipoprotein E to modulate innate immune responses within the tumor microenvironment. By enhancing apolipoprotein E-mediated depletion of myeloid-derived suppressor cells, this targeted immunostimulatory mechanism restores anti-tumor immunity to suppress growth in advanced malignancies such as non-small cell lung cancer and endometrial cancer.

Appendix RUO and cGMP Quality Standards

Quality Dimension RUO (Research Use Only) cGMP (Current Good Manufacturing Practice)
Clinical Applicability Prohibited in human clinical trials or medical diagnostics. Mandatory for human clinical trials (Phase I–III) and therapies.
Regulatory Status Non-regulated grade; exempt from drug manufacturing laws. Legally enforced by health authorities (e.g., FDA, EMA, NMPA).
Facility Environment Unclassified analytical or research laboratories. Validated Cleanrooms (ISO Class 5–8) with continuous monitoring.
Quality Control Basic purity and activity testing. Rigorous safety release testing (Sterility, Endotoxin, Mycoplasma).
Process Validation Basic equipment calibration; no process validation required. Full qualification (IQ/OQ/PQ) and complete batch records.
Quality Assurance Vendor self-declared without required formal QMS. Mandatory QA/QC unit, Change Control, CAPA, and vendor audits.
Regulatory Impact High risk of IND rejection if used as a critical raw material. Required for IND/NDA filings, supported by Drug Master Files (DMF).

Footnotes

Regulatory Note: Governed by FDA (21 CFR Parts 210/211/312), EMA (EudraLex Vol 4), ICH Guidelines (E6/Q7/Q9/Q10), and compendial standards (USP <71>/<85>/<1043>).

Note: Technical data last updated: Sep 1, 2026.