Title |
Frequent deletions at Xq28 indicate genetic heterogeneity in Hunter syndrome
|
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Published in |
Human Genetics, March 1991
|
DOI | 10.1007/bf00194643 |
Pubmed ID | |
Authors |
Peter J. Wilson, Graeme K. Suthers, David F. Callen, Elizabeth Baker, Paul V. Nelson, Alan Cooper, J. Ed Wraith, Grant R. Sutherland, C. Phillip Morris, John J. Hopwood |
Abstract |
Hunter syndrome is a human X-linked disorder caused by deficiency of the lysosomal exohydrolase iduronate-2-sulphatase (IDS). The consequent accumulation of the mucopolysaccharides dermatan sulphate and heparan sulphate, in the brain and other tissues, often results in death before adulthood. There is, however, a broad spectrum of severity that has been attributed to different mutations of the Hunter syndrome gene. We have used an IDS cDNA clone to localise the IDS gene to Xq28, distal to the fragile X mutation (FRAXA). One-third of Hunter syndrome patients had various deletions or rearrangements of their IDS gene, proving that different mutations are common in this condition. Deletions of the IDS gene can include a conserved locus that is tightly linked to FRAXA, suggesting that deletion of nearby genes may contribute to the variable clinical severity noted in Hunter syndrome. The cDNA clone was also shown to span the X chromosome breakpoint in a female Hunter syndrome patient with an X;autosome translocation. |
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Geographical breakdown
Country | Count | As % |
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Unknown | 16 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
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Professor | 2 | 13% |
Other | 1 | 6% |
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Readers by discipline | Count | As % |
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Medicine and Dentistry | 1 | 6% |
Other | 1 | 6% |
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