A Phase 1b/2, Multicenter, Randomized, Double-blind, Placebo-controlled Study to Investigate A) the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Multiple Ascending Doses of IM-101 in Adult Participants with Generalized Myasthenia Gravis, and B) the Efficacy and Safety of Treatment of IM-101 in Adult Participants with Generalized Myasthenia Gravis and Ocular Myasthenia Gravis

Generalized Myasthenia Gravis and Ocular Myasthenia Gravis

[Part A, Multiple Ascending Dose Cohorts] Incidence of TEAEs, including clinically significant changes in physical examinations or ECGs during study treatment [Part B, Expansion Cohorts] Incidence of TEAEs including clinically significant changes in physical examinations or ECGs during study treatment, [Part A, Multiple Ascending Dose Cohorts] Incidence of treatment-emergent SAEs [Part B, Expansion Cohorts] Incidence of SAEs during study treatment, [Part A, Multiple Ascending Dose Cohorts] Incidence of TEAEs leading to premature study intervention discontinuation [Part B, Expansion Cohorts] Incidence of AEs that led to premature discontinuation, [Part A, Multiple Ascending Dose Cohorts] Incidence of AESIs during study treatment period [Part B, Expansion Cohorts] Incidence of AESIs during study treatment period, [Part B, Expansion Cohorts] 1. gMG cohorts: Change from baseline to Week 16 in the MG-ADL total score 2. oMG cohort: Change from baseline to Week 16 in MGII ocular score

[Part A, Multiple Ascending Dose Cohorts] Incidence and prevalence of ADAs and NAb to IM-101 [Part B, Expansion Cohorts] Incidence and prevalence of ADAs and NAb of IM-101 over time, [Part A, Multiple Ascending Dose Cohorts] Changes from baseline in vital signs, laboratory assessments, and other safety variables [Part B, Expansion Cohorts] Changes from baseline in vital signs, laboratory assessments, and other safety variables, Part A; Serum PK IM-101, Cmax, tmax, AUC0-tau, Ctrough, CL, Vz, t1/2, ratio for Cmax & AUC0-tau Part B [gMG] 1.Change from baseline to wk16 in QMG total; MGC scale; MG-QoL15r 2. %age participants with MG-ADL ≥ 2-point & ≥ 3-point change at Wk16 3. %age participants with MSE; MG-ADL of 0 or 1 [oMG] 1.Change from baseline to Wk16 in MG-ADL ocular domain & MGII total score 2.Quantitative change from baseline to Wk16 in QMG total score [All]1.%age requiring rescue therapy over 16-wk treatment period, [Part A, Multiple Ascending Dose Cohorts] Obtain serum IM-101 concentration for modeling and simulation [Part B, Expansion Cohorts] CH50, AH50, and total C5 and free C5 at baseline and timepoints during and following treatment, [Part A, Multiple Ascending Dose Cohorts] CH50, AH50, and total C5 and free C5 at baseline and timepoints during and following treatment [Part B, Expansion Cohorts] 1. Serum IM-101 concentrations over the treatment period 2. Sparse sample collections to support population PK modeling and simulations

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