NCT05180461

Emodepside Phase II Trial for Treatment of Onchocerciasis

A Phase-II, Randomised, Double-blind, Parallel-group Trial to Investigate Emodepside (BAY 44-4400) in Subjects With Onchocerca Volvulus Infection, Comprising: Part 1 to Investigate Safety, Tolerability, Pharmacodynamics, Pharmacokinetics and Dose-Response Relationship for Efficacy (Proof-of-Concept); Part 2 to Investigate Efficacy of Selected Doses, Safety, Tolerability and Pharmacokinetics

• Status: Active Not Recruiting
• Phase: Phase 2
• Study type: Interventional
• Enrollment: 578 (estimated)
• Sponsor: Drugs for Neglected Diseases · Academic / Other
• Sex: All
• Age: 18 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

The trial evaluates safety, tolerability, pharmacodynamics, pharmacokinetics, dose-response, and efficacy of emodepside tablets, administrated as a range of dose regimens, in adults infected with Onchocerca Volvulus.

Detailed description

There is an urgent need for a macrofilaricidal drug targeting the adult stage of Onchocerca volvulus, which could be used in individual case management and, after appropriate testing, as an alternative drug to ivermectin in Mass Drug Administration (MDA) programs. Emodepside is a promising drug candidate to kill the adult and sexually mature Onchocerca volvulus. Emodepside was shown to be macrofilaricidal and microfilaricidal against a variety of filarial nematodes in non-clinical studies, and is a registered drug for animal health, commercialized by Bayer AG under the name of Profender® (in combination with praziquantel) or Procox® (in combination with toltrazuril). Three Phase I trials of emodepside with single or multiple doses of emodepside have been conducted in healthy Caucasian men. The results are encouraging and support continuation of the clinical development programme of emodepside as treatment for onchocerciasis. One of these trials also enabled the selection of a field-adapted tablet formulation, suitable for use in countries endemic for onchocerciasis. The present trial is designed in a stepwise approach starting with a proof of concept part, which is further subdivided in steps to investigate the safety, tolerability and pharmacokinetics of emodepside in the target population - Part 0 (pilot group), followed by investigations of the safety of emodepside in low and high-microfilaria carriers - Part 1a, and the dose-response relationship for efficacy of emodepside compared to placebo in microfilaria-positive patients - Part 1b. This approach allows to maximize the information regarding the safety of emodepside in the target population and to establish a dose range, in which emodepside is efficacious. Based on the information obtained from Parts 0 and 1, up to two efficacious dose regimens will be selected to carry forward into the confirmatory, active-controlled Part 2 of the trial, which will investigate the superiority of emodepside over ivermectin assessed using a clinically relevant endpoint, i.e. long-term absence of microfilariae at month 24.

Conditions

• Onchocerciasis

Interventions

Type	Name	Description
DRUG	emodepside	emodepside tablet
DRUG	matching placebo of emodepside	emodepside matching placebo tablet
DRUG	ivermectin	ivermectin tablet (overencapsulated for blinding)
DRUG	matching placebo of ivermectin	matching placebo of overencapsulated ivermectin tablet

Timeline

• Start date: 2021-08-30
• Primary completion: 2026-09-18
• Completion: 2026-10-02
• First posted: 2022-01-06
• Last updated: 2024-03-05

Locations

3 sites across 2 countries: Democratic Republic of the Congo, Ghana