This is a study of mRNA-3705 in participants with isolated elevated methylmalonic acid (MMA) due to methylmalonyl-coenzyme A (CoA) mutase (MUT) deficiency. The main goal of the study is to assess safety, efficacy, pharmacokinetics, and pharmacodynamics of intravenously (IV)-infused mRNA-3705.
Phase 1 trials primarily test safety and dosing in a small number of participants (typically 20–100). Results do not yet speak to efficacy. FDA approval is typically many years away from this stage.
Phase 2 trials begin testing efficacy in a larger patient group (100–300). This is often where biotech binary events occur — positive Phase 2 data can significantly advance a company's pipeline narrative, while failures can be terminal for a program.
This trial was terminated before completion. Termination can indicate safety signals, futility findings, or business/regulatory decisions by the sponsor.
Moderna Inc (MRNA) is the sponsoring company for this trial. BiotechSign currently grades this company C (59/100) based on composite catalyst signals across its full pipeline. This trial is one data point in that overall catalyst picture.