Diagnostic pathology · 2011
Mucopolysaccharidosis type I: molecular characteristics of two novel alpha-L-iduronidase mutations in Tunisian patients.
СтатьяНазвание и аннотация: Перевод в очереди
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Chkioua Latifa, Khedhiri Souhir, Turkia Hadhami Ben, Tcheng Rémy, Froissart Roseline, Chahed Henda, Ferchichi Salima, Ben Dridi Marie Françoise, Vianey-Saban Christine, Laradi Sandrine, Miled Abdelhedi
Аннотация
BACKGROUND: Mucopolysaccharidosis type I (MPS I) is an autosomal storage disease resulting from defective activity of the enzyme α-L-iduronidase (IDUA). This glycosidase is involved in the degradation of heparan sulfate and dermatan sulfate. MPS I has severe and milder phenotypic subtypes.
AIM OF STUDY: This study was carried out on six newly collected MPS I patients recruited from many regions of Tunisia.
PATIENTS AND METHODS: Mutational analysis of the IDUA gene in unrelated MPS I families was performed by sequencing the exons and intron-exon junctions of IDUA gene.
RESULTS: Two novel IDUA mutations, p.L530fs (1587_1588 insGC) in exon 11 and p.F177S in exon 5 and two previously reported mutations p.P533R and p.Y581X were detected. The patient in family 1 who has the Hurler phenotype was homozygous for the previously described nonsense mutation p.Y581X.The patient in family 2 who also has the Hurler phenotype was homozygous for the novel missense mutation p.F177S. The three patients in families 3, 5 and 6 were homozygous for the p.P533R mutation. The patient in family 4 was homozygous for the novel small insertion 1587_1588 insGC. In addition, eighteen known and one unknown IDUA polymorphisms were identified.
CONCLUSION: The identification of these mutations should facilitate prenatal diagnosis and counseling for MPS I in Tunisia.
AIM OF STUDY: This study was carried out on six newly collected MPS I patients recruited from many regions of Tunisia.
PATIENTS AND METHODS: Mutational analysis of the IDUA gene in unrelated MPS I families was performed by sequencing the exons and intron-exon junctions of IDUA gene.
RESULTS: Two novel IDUA mutations, p.L530fs (1587_1588 insGC) in exon 11 and p.F177S in exon 5 and two previously reported mutations p.P533R and p.Y581X were detected. The patient in family 1 who has the Hurler phenotype was homozygous for the previously described nonsense mutation p.Y581X.The patient in family 2 who also has the Hurler phenotype was homozygous for the novel missense mutation p.F177S. The three patients in families 3, 5 and 6 were homozygous for the p.P533R mutation. The patient in family 4 was homozygous for the novel small insertion 1587_1588 insGC. In addition, eighteen known and one unknown IDUA polymorphisms were identified.
CONCLUSION: The identification of these mutations should facilitate prenatal diagnosis and counseling for MPS I in Tunisia.