IDUA mutational profile and genotype-phenotype relationships in UK patients with Mucopolysaccharidosis Type I.
Mucopolysaccharidosis Type I (MPS I) is a lysosomal storage disorder with varying degrees of phenotypic severity caused by mutations in IDUA. Over 200 disease-causing variants in IDUA have been reported. We describe the profile of disease-causing variants in 291 individuals with MPS I for whom IDUA sequencing was performed, focusing on the UK subset of the cohort. A total of 63 variants were identified, of which 20 were novel, and the functional significance of the novel variants is explored. The severe form of MPS I is treated with hematopoietic stem cell transplantation, known to have improved outcomes with earlier age at treatment. Developing genotype-phenotype relationships would therefore have considerable clinical utility, especially in the light of the development of newborn screening programs for MPS I. Associations between genotype and phenotype are examined in this cohort, particularly in the context of the profile of variants identified in UK individuals. Relevant associations can be made for the majority of UK individuals based on the presence of nonsense or truncating variants as well as other associations described in this report.
['Ghosh|Arunabha|A|0000-0002-8202-8693', 'Mercer|Jean|J|', 'Mackinnon|Sabrina|S|', 'Yue|Wyatt W|WW|', 'Church|Heather|H|', 'Beesley|Clare E|CE|', 'Broomfield|Alex|A|', 'Jones|Simon A|SA|', 'Tylee|Karen|K|']
D000483:Alleles D004789:Enzyme Activation D056726:Genetic Association Studies D005838:Genotype D006801:Humans D007068:Iduronidase D008059:Mucopolysaccharidosis I D009154:Mutation D010641:Phenotype D017422:Sequence Analysis, DNA D012720:Severity of Illness Index D006113:United Kingdom
IDUA genotype-phenotype relationships Mucopolysaccharidosis Type I newborn screening Hurler Hurler-Scheie Scheie genotype-phenotype correlations iduronidase