Flavopiridol restores granulopoiesis in experimental models of severe congenital neutropenia.

Severe congenital neutropenia (CN) patients require life-long treatment with recombinant human granulocyte colony-stimulating factor (rhG-CSF), but some show no response. We sought to establish a therapy for CN that targets signaling pathways causing maturation arrest of granulocytic progenitors. We developed an isogenic induced pluripotent stem cell (iPSC) in vitro model of CN associated with ELANE mutations (ELANE-CN) and performed an in silico drug repurposing analysis of the transcriptomics of iPSC-generated hematopoietic stem and progenitor cells.

CRISPR-Cas9n-mediated ELANE promoter editing for gene therapy of severe congenital neutropenia.

Severe congenital neutropenia (CN) is an inherited pre-leukemia bone marrow failure syndrome commonly caused by autosomal-dominant ELANE mutations (ELANE-CN). ELANE-CN patients are treated with daily injections of recombinant human granulocyte colony-stimulating factor (rhG-CSF). However, some patients do not respond to rhG-CSF, and approximately 15% of ELANE-CN patients develop myelodysplasia or acute myeloid leukemia.