Clinical Trials

Enpatoran is evaluated across multiple clinical trials spanning Phase 1, Phase 2, and Phase 3 studies sponsored by EMD Serono Research & Development Institute, Inc. and Merck Healthcare KGaA. The clinical development landscape targets autoimmune conditions—including systemic lupus erythematosus, cutaneous lupus erythematosus, dermatomyositis, and polymyositis—alongside healthy volunteers and individuals with renal impairment. Spanning recruitment statuses from completed and active to terminated, initial Phase 1 safety and Phase 2 dose-ranging trials support currently recruiting Phase 3 studies confirming efficacy in lupus populations.

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT07355218 RECRUITING
Systematic Lupus Erythematosus; Cutaneous Lupus Erythematosus
EMD Serono Research & Development Institute, Inc.
2026-04-01 PHASE3
NCT07332481 RECRUITING
Systemic Lupus Erythematosus (SLE); Cutaneous Lupus Erythematosus (CLE)
EMD Serono Research & Development Institute, Inc.
2026-03-10 PHASE3
NCT05540327 ACTIVE_NOT_RECRUITING
Systemic Lupus Erythematosus
Merck Healthcare KGaA, Darmstadt, Germany, an affiliate of Merck KGaA, Darmstadt, Germany
2022-09-16 PHASE2
NCT06589713 COMPLETED
Renal Impairment
Merck Healthcare KGaA, Darmstadt, Germany, an affiliate of Merck KGaA, Darmstadt, Germany
2024-09-24 PHASE1
NCT05650567 TERMINATED
Dermatomyositis; Polymyositis
EMD Serono Research & Development Institute, Inc.
2023-01-19 PHASE2
NCT06589726 COMPLETED
Healthy
Merck Healthcare KGaA, Darmstadt, Germany, an affiliate of Merck KGaA, Darmstadt, Germany
2024-09-10 PHASE1
NCT05162586 COMPLETED
Systemic Lupus Erythematosus
EMD Serono Research & Development Institute, Inc.
2022-03-31 PHASE2
NCT05110027 COMPLETED
Healthy
Merck Healthcare KGaA, Darmstadt, Germany, an affiliate of Merck KGaA, Darmstadt, Germany
2021-11-05 PHASE1

(data from https://clinicaltrials.gov, updated on 2026-08-17)

Check the Enpatoran product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Compliance for Clinical Use

Mechanism and Biochemical Profile

Enpatoran functions as a potent, selective inhibitor of Toll-like receptors 7 and 8 (TLR7/8), blocking receptor activation to inhibit downstream proinflammatory signaling cascades within innate immune cells. By dampening pathogenic endosomal TLR7/8 hyperactivation, this targeted inhibition reduces systemic inflammation and autoantibody responses, supporting its clinical evaluation for autoimmune indications such as systemic lupus erythematosus and cutaneous lupus erythematosus.

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.