IMCY-0141 Safety and Efficacy in Multiple Sclerosis - ISEMIS Study

Multiple Sclerosis, Relapsing-Remitting Clinical Trial

Official title: A Phase I/II Dose Escalation/Adaptive Design Study to Evaluate the Safety and Efficacy of IMCY-0141 in Patients With Relapsing Remitting-Multiple Sclerosis (RR-MS)

Status Active, not recruiting

Clinical Trial Summary

The IMCY-MS-001 study is a study to test a new experimental drug, IMCY-0141, for the treatment of Relapsing-Remitting Multiple Sclerosis (RR-MS).

The pathophysiology of MS with known myelin autoantigens and T cell epitopes makes this disease a particularly attractive indication for development of an immunotherapeutic based on the Imcyse technology.

Based on the unique mechanism of action of the drug, IMCY-0141 administered as early as possible after confirmation of the diagnosis may potentially switch-off the autoimmune process and limit the corresponding myelin destruction. Newly (recently) diagnosed patients will be targeted to tackle the disease at its onset.

Before launching any efficacy studies, safety of IMCY-0141 in MS patients must be evaluated with a phase I, open-label, dose escalation clinical trial to evaluate the safety of three IMCY-0141 doses followed by a phase II, double-blind, randomized study with an adaptive design to determine if any IMCY-0141 dose(s) offer superior efficacy relative to placebo and to assess immune responses and biomarker data as potential early predictors of efficacy of IMCY-0141 in adults presenting with RR-MS.

Clinical Trial Description

The Sample Size determined for this study is as follows:

Phase I:

A total of 12 patients (4 patients in each of 3 dose cohorts) are planned to be enrolled. The study sample size has been estimated as adequate to provide a reliable safety assessment of the tested doses. All primary, secondary and exploratory endpoints will be summarized by descriptive statistics (continuous variables) or frequency tables (categorical variables), by dose group and overall. Additional patients may be enrolled if requested by the IDMC (Independent Data Monitoring Committee).

Phase II:

The sample size estimation is based on the total cumulative number of CUAL observed on brain MRI scans from week 12 till week 36. The study sample size has been estimated as adequate to determine if any IMCY-0141 doses offer superior efficacy (as measured by CUAL) relative to placebo. Using the negative binomial model for CUAL, a maximum total of 150 patients are planned to be enrolled (including the 12 patients enrolled in phase I), with 30 patients randomized to each of five groups:

• Placebo

• IMCY-0141 dose 1

• IMCY-0141 dose 2

• IMCY-0141 dose 3

• DMF (open label)

During the adaptive design phase (Phase IIa), a minimum of 40 patients will be enrolled (with 8 patients randomized to each of five groups) and analyzed along with the 12 phase I patients as detailed here:

• Placebo: 8 patients

• IMCY-0141 dose 1: 8 patients + 4 phase I patients

• IMCY-0141 dose 2: 8 patients + 4 phase I patients

• IMCY-0141 dose 3: 8 patients + 4 phase I patients

• DMF (open label) : 8 patients

During the Phase IIb part, up to 98 additional patients will be enrolled in order to get up to 150 patients spread over the groups selected for Phase IIb, with a maximum 30 patients randomized to DMF. These sample sizes are sufficient to deliver Type I errors less than 5% in our chosen null scenarios, and unconditional powers greater than 75% and conditional powers greater than 90% in our two alternative scenarios. ;

Related Conditions & MeSH terms

• Multiple Sclerosis
• Multiple Sclerosis, Relapsing-Remitting
• Sclerosis

• NCT number: NCT05417269
• Study type: Interventional
• Source: Imcyse SA
• Status: Active, not recruiting
• Phase: Phase 1/Phase 2
• Start date: April 12, 2022
• Completion date: December 31, 2025