El Copey

Researchers are evaluating the effectiveness, safety, and tolerability of mavorixafor in people aged 12 and older who have congenital or acquired primary autoimmune and idiopathic chronic neutropenic disorders. These participants experience repeated and/or serious infections due to low neutrophil levels. The study aims to show clinical benefit by increasing circulating neutrophils and reducing infection rates. Participants will continue their existing treatments, which may include granulocyte-colony stimulating factor (G-CSF), immunoglobulin replacement, prophylactic antibiotics, or observation without active treatment. They will be randomly assigned to receive either mavorixafor or a placebo, with both drugs given according to a set schedule. The study is double-blind and placebo-controlled, conducted across multiple centers. During the study, researchers will monitor participants for up to 52 weeks, focusing on the annual infection rate and the number of participants achieving a positive response in absolute neutrophil count. Participants will undergo regular assessments, including blood tests to measure neutrophil levels and evaluations for infections. The study includes safety monitoring and requires participants to maintain stable doses of their background therapies unless safety concerns arise.