Recently, patient mutations that activate PI3K signaling have been linked to a primary antibody deficiency. Here, we used whole-exome sequencing and characterized the molecular defects in 4 patients from 3 unrelated families diagnosed with hypogammaglobulinemia and recurrent infections. We identified 2 different heterozygous splice site mutations that affect the same splice site in
Marie-Céline Deau, Lucie Heurtier, Pierre Frange, Felipe Suarez, Christine Bole-Feysot, Patrick Nitschke, Marina Cavazzana, Capucine Picard, Anne Durandy, Alain Fischer, Sven Kracker
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