Activated PI3K-delta syndrome

Definition:

Activated PI3K-delta syndrome (APDS) is a primary immunodeficiency characterized by recurrent respiratory infections, progressive airway damage, lymphopenia, increased circulating transitional B cells, increased immunoglobulin M, and reduced immunoglobulin G2 levels in serum and impaired vaccine responses. A dominant gain-of-function mutation has been found in the p110-delta protein, the catalytic subunit of phosphoinositide 3-kinase delta (PI3K-delta), encoded by the PIK3CD gene.

References:

[1]. Elodie Elkaim, et al. Clinical and immunologic phenotype associated with activated phosphoinositide 3-kinase δ syndrome 2: A cohort study. J Allergy Clin Immunol. 2016 Jul;138(1):210-218.e9. [Content Brief]

[2]. Ivan Angulo, et al. Phosphoinositide 3-kinase δ gene mutation predisposes to respiratory infection and airway damage. Science. 2013 Nov 15;342(6160):866-71. [Content Brief]

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