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English Abstract
Journal Article
[Analysis of a patient with Retinitis pigmentosa due to a novel variant of IMPDH1 gene].
Zhonghua Yi Xue Yi Chuan Xue za Zhi = Zhonghua Yixue Yichuanxue Zazhi = Chinese Journal of Medical Genetics 2024 April 11
OBJECTIVE: To explore the genetic basis for a patient with autosomal dominant retinitis pigmentosa (RP).
METHODS: A male patient with RP treated at Gansu Provincial Maternal and Child Health Care Hospital in September 2019 was selected as the study subject. Clinical data was collected. Peripheral blood samples of the patient and his parents were subjected to whole exome sequencing (WES). Candidate variant was validated by Sanger sequencing and bioinformatic analysis.
RESULTS: The patient, a 29-year-old male, developed night blindness, amblyopia, visual field defects and optic disc abnormalities since childhood. Gene sequencing revealed that he has harbored a heterozygous c.942G>C (p.Lys314Asn) variant of the IMPDH1 gene, which was inherited from his mother, whilst his father was of the wild type. Based on the guidelines from the American College of Medical Genetics and Genomics, the c.942G>C variant was predicted as likely pathogenic (PM1+PM2_Supporting+PP3+PP1).
CONCLUSION: The c.942G>C (p.Lys314Asn) variant in the IMPDH1 gene probably underlay the RP in this patient.
METHODS: A male patient with RP treated at Gansu Provincial Maternal and Child Health Care Hospital in September 2019 was selected as the study subject. Clinical data was collected. Peripheral blood samples of the patient and his parents were subjected to whole exome sequencing (WES). Candidate variant was validated by Sanger sequencing and bioinformatic analysis.
RESULTS: The patient, a 29-year-old male, developed night blindness, amblyopia, visual field defects and optic disc abnormalities since childhood. Gene sequencing revealed that he has harbored a heterozygous c.942G>C (p.Lys314Asn) variant of the IMPDH1 gene, which was inherited from his mother, whilst his father was of the wild type. Based on the guidelines from the American College of Medical Genetics and Genomics, the c.942G>C variant was predicted as likely pathogenic (PM1+PM2_Supporting+PP3+PP1).
CONCLUSION: The c.942G>C (p.Lys314Asn) variant in the IMPDH1 gene probably underlay the RP in this patient.
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