Molecular analysis of the first case identified a mutation in exon 2 of the gene coding for WASP, leading to a p.Thr45Met amino acid change and confirming the diagnosis of X-linked thrombocytopenia.
Here we describe a new disease, X-linked severe congenital neutropenia (XLN), caused by a novel L270P mutation in the region of WAS encoding the conserved GTPase binding domain (GBD).
Two other nucleotide substitutions in this codon, R86L and R86H, have been reported previously, both giving rise to typical WAS symptoms, indicating a mutational hot spot in this codon.
Here we describe a new disease, X-linked severe congenital neutropenia (XLN), caused by a novel L270P mutation in the region of WAS encoding the conserved GTPase binding domain (GBD).
In total, three patients revealed low expression of WASP associated with a <i>WAS</i> gene c.1378 C>T p.Pro460Ser mutation, which has previously been reported as a pathogenic mutation in WAS and X-linked thrombocytopenia.
In total, three patients revealed low expression of WASP associated with a <i>WAS</i> gene c.1378 C>T p.Pro460Ser mutation, which has previously been reported as a pathogenic mutation in WAS and X-linked thrombocytopenia.
A recently identified WASp(I294T) mutation was shown to render WASp constitutively active in vivo, causing increased filamentous (F)-actin polymerization, high podosome turnover in macrophages, and myelodysplasia.
A recently identified WASp(I294T) mutation was shown to render WASp constitutively active in vivo, causing increased filamentous (F)-actin polymerization, high podosome turnover in macrophages, and myelodysplasia.
Scanning of the Wiskott-Aldrich syndrome (WAS) gene: identification of 18 novel alterations including a possible mutation hotspot at Arg86 resulting in thrombocytopenia, a mild WAS phenotype.
Four amino acid substitutions, Leu27Phe, Thr48Ile, Val75Met and Arg477Lys, were found in patients with congenital thrombocytopenia and no clinically evident immune defect indicating that the WASP gene is the site for mutations in X-linked thrombocytopenia as well as in WAS.
Identification of WASP mutations in patients with Wiskott-Aldrich syndrome and isolated thrombocytopenia reveals allelic heterogeneity at the WAS locus.
Herein we report 2 siblings with chronic thrombocytopenia that were diagnosed with XLT based on a missense mutation in the WASP gene (223G>A, Val75Met).