Abstract

Congenital neutropenia, which refers to an inherited deficiency in neutrophils, is a rare pathologic condition that affects approximately 0.0001-0.0009% of the general population. While congenital neutropenia can result from mutations in approximately 30 genes, its leading cause is gain-of-function mutations in the ELANE gene, which encodes the neutrophil granule serine protease, neutrophil elastase. This review focuses on established and novel concepts in the genetic, molecular and cellular mechanisms underlying neutrophil elastase-dependent neutropenia, and discusses possible new avenues for neutropenia research as well as potential novel treatment options that target pathogenic elastase variants.

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