Abstract
The Janus kinase-signal transducer and activator of transcription (JAK-STAT) signaling cascade is an evolutionarily conserved signal transduction pathway that regulates many vital cellular processes, including immune function and hematopoiesis. Human genetic variants that disrupt JAK-STAT signaling are being found to cause a rapidly increasing number of diseases, including both germline-encoded inborn errors of immunity (IEI) and acquired somatic variants, causing a so-called phenocopy of the IEI. Multiple genetic mechanisms are responsible for this growing group of JAK-STAT diseases including loss-of-function, gain-of-function, and dominant negative effects. In this review, we discuss the clinical presentation and pathogenesis of all currently described JAK-STAT defects, as well as provide an overview of the guiding principles to consider in diagnosing and treating these conditions.
Published Version
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