El Copey

Researchers are evaluating mavorixafor, a drug being studied for people aged 12 and older who have congenital or acquired primary autoimmune and idiopathic chronic neutropenic disorders. These conditions cause low neutrophil levels and lead to recurrent or serious infections. The study aims to show if mavorixafor can improve clinical outcomes and increase neutrophil counts, while also assessing its safety and tolerability. Participants will continue their current treatment during the study, which may include therapies like granulocyte-colony stimulating factor G-CSF, immunoglobulin replacement, antibiotics, or no active treatment. They will be randomly assigned to receive either mavorixafor or a placebo orally once daily for up to 52 weeks. The study uses a quadruple-blind design to compare these groups in parallel. During the trial, participants will have regular assessments to monitor infection rates and severity, neutrophil counts, antibiotic use, oral ulcers, and fatigue levels using questionnaires. An independent committee will review infections to ensure accuracy. Safety and treatment effects will be followed throughout the 52-week treatment period. The total participation may last until the study ends in late 2027.