Identification of a novel mutation of IDS gene from a Chinese pedigree with MPS II

Yi chuan = Hereditas
Yi-bin GuoLu-Ming CHEN

Abstract

The purpose of this study was to understand the molecular genetic mechanism of mucopolysaccharidosis type II (MPS II) and to provide a prerequisite for future prenatal gene diagnosis. A preliminary diagnosis was made by qualitative detection of Urinary Glycosaminoglycans of the suspected MPS II proband. Then, mutation detection was performed on the proband and his family members with PCR and direct sequencing of PCR products. After the novel mutation of c.876 del 2 in IDS gene was detected, sequence analysis was performed on exon 6 of IDS gene of the 135 cases, which consisted of 120 randomly selected normal controls, and other 15 patients with MPS I, IV, and VI other than MPS II. Besides, the patho-genicity of the novel mutation was analyzed with the following 2 methods: conservative analysis of the sequence of muta-tion spots of different species and the direct test of the IDS enzyme activity of the patient and his relative family members. The result of uroscopy of the proband was strong positive (GAGs +++). There was a novel deletion mutation of c.876-877 del TC in the coding region of exon 6 of IDS gene, which was a hemizygous mutation. However, the mutation of his mother and sister was a heterozygous mutation. Detection of...Continue Reading

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Citations

Sep 16, 2020·International Journal of Environmental Research and Public Health·Miguel Sampayo-CorderoJordi Pérez-López

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