FDA Expands Joenja Approval to Children Aged 4 to 11 Years with APDS
The U.S. Food and Drug Administration (FDA) has expanded the approval of Joenja (leniolisib) for the treatment of activated phosphoinositide 3-kinase delta syndrome (APDS) to include children aged 4 to 11 years who weigh at least 27kg. This new approval builds upon the existing authorization for patients aged 12 years and older. APDS is a rare primary immunodeficiency caused by genetic variants in the PIK3CD or PIK3R1 genes, which are crucial for immune cell function. These variants lead to the overactivation of the PI3Kδ pathway, resulting in immunodeficiency and dysregulation. Joenja is an oral, small molecule PI3Kδ inhibitor designed to target this pathway. The FDA's decision was supported by data from a single-arm, phase 3 study involving 8 patients in the 4 to 11 age group, which showed consistent pharmacokinetic and safety profiles compared to older patients. The approval also introduces new 40mg and 50mg tablet strengths to accommodate pediatric dosing based on body weight.