Autosomal dominant macrothrombocytopenia with leukocyte inclusions (May-Hegglin anomaly) is linked to chromosome 22q12-13.

Published

Journal Article

Macrothrombocytopenia with leukocyte inclusions (May-Hegglin anomaly) is a rare autosomal dominant disorder characterized by thrombocytopenia, giant platelets, and Döhle body-like inclusions in leukocytes. To determine the genetic basis of this disorder, we performed a genome-wide screen for linkage in three families with May-Hegglin anomaly. For the pooled analysis of the three families, three markers on chromosome 22 had two-point logarithm-of-difference (lod) scores greater than 3, with a maximum lod score of 3.91 at a recombination fraction (theta) of 0.076 for marker D22S683. Within the largest family (MHA-1), the maximum lod score was 5.36 at theta=0 at marker D22S445. Fine mapping of recombination events using eight adjacent markers indicated that the minimal disease region of family MHA-1 alone is in the approximately 26 cM region from D22S683 to the telomere. The maximum lod score for the three families combined was 5.84 at theta=0 for marker IL2RB. With the assumption of locus homogeneity, haplotype analysis of family MHA-4 indicated the disease region is centromeric to marker D22S1045. These data best support a minimal disease region from D22S683 to D22S1045, a span of about 1 Mb of DNA that contains 17 known genes and 4 predicted genes. Further analysis of this region will identify the genetic basis of May-Hegglin anomaly, facilitating subsequent characterization of the biochemical role of the disease gene in platelet formation.

Full Text

Duke Authors

Cited Authors

  • Kelley, MJ; Jawien, W; Lin, A; Hoffmeister, K; Pugh, EW; Doheny, KF; Korczak, JF

Published Date

  • May 2000

Published In

Volume / Issue

  • 106 / 5

Start / End Page

  • 557 - 564

PubMed ID

  • 10914687

Pubmed Central ID

  • 10914687

International Standard Serial Number (ISSN)

  • 0340-6717

Digital Object Identifier (DOI)

  • 10.1007/s004390000294

Language

  • eng

Conference Location

  • Germany