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  • Title: [Clinical phenotype and genetic analysis of a Chinese patient featuring X-linked Claes-Jensen type syndromic mental retardation].
    Author: Gao M, Xing M, Zhang K, Lyu Y, Ma J, Gai Z, Liu Y.
    Journal: Zhonghua Yi Xue Yi Chuan Xue Za Zhi; 2020 Jul 10; 37(7):736-738. PubMed ID: 32619253.
    Abstract:
    OBJECTIVE: To explore the genetic basis of a Chinese patient featuring global developmental delay. METHODS: Peripheral venous blood samples from the proband and his parents and sister were taken for the extraction of DNA. Target capture and next generation sequencing was carried out to detect genetic variants associated with the disease. Suspected variant was validated by Sanger sequencing. RESULTS: Genetic testing discovered that the proband has carried hemizygous c.150G>T and c.150+1G>T variants of the KDM5C gene which are inherited from his mother. His younger sister also carried the variants. The c.150+1G>A variant was unreported previously, which has altered a splice site and was predicted to be pathogenic by bioinformatics analysis. CONCLUSION: The hemizygous c.150+1G>T variant of the KDM5C gene, known to underlie X-linked Claes-Jensen type syndromic mental retardation, probably accounts for the disorder in the patient. Identification of this variant has enriched the variant spectrum of the KDM5C gene.
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