To better understand the impact of B cells in this disease, we generated an inducible model of the common APDS mutation (h<i>PIK3CD</i>-E1021K; referred to as aPIK3CD) and intercrossed these mice with B cell-specific Cre models.
Here, we describe activated PI3K-δ syndrome (APDS), a PID associated with a dominant gain-of-function mutation in which lysine replaced glutamic acid at residue 1021 (E1021K) in the p110δ protein, the catalytic subunit of phosphoinositide 3-kinase δ (PI3Kδ), encoded by the PIK3CD gene.
Identification of variations in the human phosphoinositide 3-kinase p110delta gene in children with primary B-cell immunodeficiency of unknown aetiology.