PITX3 mutations associated with autosomal dominant congenital cataract in the Chinese population
Autor: | Xiujie Zheng, Chengbo Fang, Jian Li, Jiansuo Lin, Bing Luan, Haijiang Zeng, Zhen-Ning Zhang, Jianjun Chen, Sihan Lv, Zehua Wu, Delong Meng, Zilin Zhong |
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Rok vydání: | 2019 |
Předmět: |
Male
0301 basic medicine Proband Cancer Research Mutant Intracellular Space Fluorescent Antibody Technique Biology medicine.disease_cause Biochemistry Cataract 03 medical and health sciences Transactivation symbols.namesake 0302 clinical medicine Asian People Exome Sequencing Genetics medicine Humans Genetic Predisposition to Disease Molecular Biology Gene Genetic Association Studies Exome sequencing Homeodomain Proteins Sanger sequencing Mutation Computational Biology paired like homeodomain 3 gene Articles Penetrance eye diseases autosomal dominant inheritance Protein Transport 030104 developmental biology congenital cataract Gene Expression Regulation Oncology 030220 oncology & carcinogenesis symbols Molecular Medicine Female Protein Binding Transcription Factors |
Zdroj: | Molecular Medicine Reports |
ISSN: | 1791-3004 1791-2997 |
DOI: | 10.3892/mmr.2019.9989 |
Popis: | The present study aimed to identify the disease‑causing gene of a four‑generation Chinese family affected with congenital posterior subcapsular cataracts (CPSC), to additionally investigate the frequency of paired like homeodomain 3 (PITX3) mutations in Chinese patients with autosomal dominant congenital cataract (ADCC) and to analyze the pathogenesis of the mutations identified in the present study. Whole exome sequencing (WES) was utilized to identify the genetic cause of CPSC in the four‑generation family. Sanger sequencing was performed to verify the WES results and to screen for mutations of the PITX3 gene in probands of an additional 194 Chinese ADCC families. Co‑segregation analysis was performed in the family members with available DNA. Subcellular localization analyses and transactivation assays were performed for the PITX3 mutations identified. From the WES data, the c.608delC (p.A203GfsX106) mutation of PITX3 was identified in the four‑generation family with CPSC. A second PITX3 mutation c.640_656del (p.A214RfsX42) was detected in two of the additional 194 ADCC families and one of these two families exhibited incomplete penetrance. Functional studies indicated that these 2 PITX3 mutant proteins retained a nuclear localization pattern, but resulted in decreased transactivation activity, similar to other previously identified PITX3 mutations. In the present study, 2 different mutations (p.A203GfsX106 and p.A214RfsX42) in PITX3 were identified as the causative defect in a four‑generation family with CPSC and two ADCC families, respectively. The prevalence of PITX3 gene‑associated cataract was 1.54% (3/195) in the Chinese congenital cataract (CC) family cohort. In vitro functional analyses of these 2 PITX3 mutations were performed, in order to enhance understanding of the pathogenesis of CC caused by PITX3 mutations. |
Databáze: | OpenAIRE |
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