Lupus & antiphospholipid syndrome

Safety, pharmacokinetics, biomarker response and efficacy of E6742: a dual antagonist of Toll-like receptors 7 and 8, in a first in patient, randomised, double-blind, phase I/II study in systemic lupus erythematosus

RMD OpenPublished Randomised controlled trial

Authors' conclusion

E6742 had a favourable safety profile and was well tolerated, with suppression of IGS responses and preliminary efficacy signals in patients with SLE.

Study context

Population
Patients with systemic lupus erythematosus (SLE)
Participants
8 / 9 / 9
Comparison
E6742 100 or 200 mg twice daily for 12 weeks vs placebo
  • E6742 100 mgn = 8
  • E6742 200 mgn = 9
  • Placebon = 9reference
Primary endpoint
Safety (TEAEs)
Methodological detailsdouble-blind, placebo-controlled, phase I/II, first in patient, two sequential cohorts
  • Double-blind
  • Placebo-controlled
  • Phase I/II
  • First in patient
  • Two sequential cohorts

Primary result

As reported in the abstract

Any TEAE
Any TEAE, E6742 pooled
58.8%

Secondary outcomes

OutcomeE6742 200 mgPlacebo
BICLA response (exploratory) · week 1257.1%33.3%
  • BICLA response (exploratory): 4/7 patients for E6742 200 mg

Pharmacokinetics (PK) parameters

Similar to previous phase I studies in healthy adults

Interferon gene signature (IGS) and proinflammatory cytokines after ex-vivo TLR7/8 agonist challenge

Immediately decreased by E6742 treatment

Safety

Any TEAE

Any TEAE

No CTCAE ≥Grade 3 treatment-emergent adverse events (TEAEs) occurred

Original publication

Safety, pharmacokinetics, biomarker response and efficacy of E6742: a dual antagonist of Toll-like receptors 7 and 8, in a first in patient, randomised, double-blind, phase I/II study in systemic lupus erythematosus. RMD Open. Published 17 September 2024. doi:10.1136/rmdopen-2024-004701

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