Journal of Inherited Metabolic Disease

, Volume 19, Issue 3, pp 301–308

Mucopolysaccharidosis IVA: a comparative study of polymorphic DNA haplotypes in the Caucasian and Japanese populations

  • G. M. M. Rezvi
  • S. Tomatsu
  • S. Fukuda
  • A. Yamagishi
  • A. Cooper
  • J. E. Wraith
  • H. Iwata
  • Z. Kato
  • N. Yamada
  • K. Sukegawa
  • N. Shimozawa
  • Y. Suzuki
  • N. Kondo
  • T. Orii
Article
  • 42 Downloads

Summary

Mucopolysaccharidosis IVA (MPS IVA) is an autosomal recessive disorder caused by deficiency of the lysosomal enzymeN-acetylgalactosamine-6-sulphate sulphatase (GALNS). The genetic heterogeneity at the GALNS locus was studied in 62 mutant alleles and 376 normal alleles in the Caucasian population and also in 40 mutant and 100 normal alleles in the Japanese population. For this study, six different restriction fragment length polymorphisms (RFLPs) at the GALNS locus were analysed to search for the frequency of each RFLP produced byStyI,SphI,RsaI,HaeIII,StuI andHapII restriction endonucleases. We detected a total of 27 haplotypes in the Caucasian and Japanese population. Of these 27 haplotypes, 18 haplotypes were present in the Caucasian population and the most common of these was haplotype 1 (ABHcde) in both mutant and normal alleles. In contrast, in the Japanese population we found 20 of the 27 haplotypes and the most common in mutant and normal alleles was haplotype 2 (abhcDE). Within these two populations a parent in the MPS IVA family has an average probability of greater than 77% (in the Caucasian population 77.27% and in the Japanese population 78.26%) of being heterozygous, and hence informative for linkage, at one or more GALNS RFLP sites. Our results delineate the molecular heterogeneity of MPS IVA haplotypes, as well as their significant interpopulation variation, and make prenatal diagnosis and carrier detection possible in the majority of families with one affected child.

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Copyright information

© SSIEM and Kluwer Academic Publishers 1996

Authors and Affiliations

  • G. M. M. Rezvi
    • 1
  • S. Tomatsu
    • 1
  • S. Fukuda
    • 1
  • A. Yamagishi
    • 1
  • A. Cooper
    • 2
  • J. E. Wraith
    • 2
  • H. Iwata
    • 1
  • Z. Kato
    • 1
  • N. Yamada
    • 1
  • K. Sukegawa
    • 1
  • N. Shimozawa
    • 1
  • Y. Suzuki
    • 1
  • N. Kondo
    • 1
  • T. Orii
    • 1
  1. 1.Department of PediatricsGifu University School of MedicineGifuJapan
  2. 2.Royal Manchester Children's HospitalManchesterUK

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