Analysis of patients with severe congenital neutropenia (SCN) may shed light on the delicate balance of factors controlling differentiation, maintenance, and decay of neutrophils. We identify 9 distinct homozygous mutations in the gene encoding Jagunal homolog 1 (JAGN1) in 14 SCN patients. JAGN1-mutant granulocytes are characterized by ultrastructural defects, paucity of granules, aberrant N-glycosylation of multiple proteins, and increased apoptosis. JAGN1 participates in the secretory pathway and is required for granulocyte-colony stimulating factor receptor-mediated signaling. JAGN1 emerges as a factor necessary in differentiation and survival of neutrophils.

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The PROTECT technique is a promising new approach to significantly reduce thrombus fragmentation and, hence distal embolization during MT. This safe and efficient technique needs to be validated in larger trials to confirm our results.

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