| Autor: |
Kelley, Michael J., Jawien, William, Lin, Albert, Hoffmeister, Karen, Pugh, Elizabeth W., Doheny, Kimberly F., Korczak, Jeannette F. |
| Předmět: |
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| Zdroj: |
Human Genetics; May2000, Vol. 106 Issue 5, p557-564, 8p |
| Abstrakt: |
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 (θ) of 0.076 for marker D22S683. Within the largest family (MHA-1), the maximum lod score was 5.36 at θ=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 ~26 cM region from D22S683 to the telomere. The maximum lod score for the three families combined was 5.84 at θ=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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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