A congenital CSF3R mutation in chronic neutropenia reveals a vital role for a cytokine receptor extracellular hinge motif in the response to granulocyte colony‐stimulating factor. Issue 4 (31st October 2022)

• Record Type: Journal Article
• Authors: Feyen, Jacqueline; Ernst, Martijn P. T.; van der Velden, Vincent H. J.; Valk, Peter J. M.; Broeders, Lianne; Touw, Ivo P.; Raaijmakers, Marc H. G. P.
• Is Part Of: Pediatric blood & cancer. Volume 70:Issue 4(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-10-31
• Subjects: congenital neutropenia -- CSF3 -- CSF3R -- granulopoiesis -- hinge motif; Tumors in children -- Periodicals; Blood -- Diseases -- Periodicals; Cancer in children -- Periodicals; 618.92
• DOI: 10.1002/pbc.30039
• Languages: English
• ISSNs: 1545-5009

Abstract

Abstract: We describe a patient with congenital neutropenia (CN) with a homozygous germline mutation in the colony‐stimulating factor 3 receptor gene ( CSF3R ). The patient's bone marrow shows lagging neutrophil development with subtle left shift and unresponsiveness to CSF3 in in vitro colony assays. This patient illustrates that the di‐proline hinge motif in the extracellular cytokine receptor homology domain of CSF3R is critical for adequate neutrophil production, but dispensable for in vivo terminal neutrophil maturation. This report underscores that CN patients with inherited CSF3R mutations should be marked as a separate clinical entity, characterized by a failure to respond to CSF3.