C-terminal RUNX1 mutation in familial platelet disorder with predisposition to myeloid malignancies

Int J Hematol. 2018 Dec;108(6):652-657. doi: 10.1007/s12185-018-2514-3. Epub 2018 Aug 6.

Abstract

Here we report a C-terminal RUNX1 mutation in a family with platelet disorder and predisposition to myeloid malignancies. We identified the mutation c.866delG:p.Gly289Aspfs*22 (NM_001754) (RUNX1 b-isoform NM_001001890; c.785delG:p.Gly262Aspfs*22) using exome sequencing of samples obtained from eight members of a single family. The mutation found in our pedigree is within exon eight and the transactivation domain of RUNX1. One of the affected individuals developed myelodysplastic syndrome (MDS), which progressed to acute myelogenous leukemia (AML). A search for the second hit which led to the development of MDS and later AML in this individual revealed the PHF6 gene variant (exon9:c.872G > A:p.G291E; NM_001015877), BCORL1 (exon3:c.1111A > C:p.T371P; NM_001184772) and BCOR gene variant (exon4:c.2076dupT:p.P693fs; NM_001123383), which appear to be very likely second hits participating in the progression to myeloid malignancy.

Keywords: Familial platelet disorder with predisposition to myeloid malignancies; Inherited thrombocytopenia; RUNX1.

Publication types

  • Case Reports

MeSH terms

  • Biopsy
  • Blood Platelet Disorders / blood*
  • Blood Platelet Disorders / genetics*
  • Blood Platelet Disorders / pathology
  • Child, Preschool
  • Chromosome Aberrations
  • Core Binding Factor Alpha 2 Subunit / chemistry
  • Core Binding Factor Alpha 2 Subunit / genetics*
  • DNA Mutational Analysis
  • Disease Progression
  • Family
  • Female
  • Genetic Predisposition to Disease*
  • Humans
  • Karyotype
  • Leukemia, Myeloid / diagnosis*
  • Leukemia, Myeloid / genetics*
  • Mutation*
  • Platelet Count
  • Polymorphism, Single Nucleotide

Substances

  • Core Binding Factor Alpha 2 Subunit
  • RUNX1 protein, human