Related Experiment Video
Updated: Sep 2, 2025
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An Allele-specific Gene Expression Assay to Test the Functional Basis of Genetic Associations
Published on: November 3, 2010
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Genotype-Phenotype Correlation Reanalysis in 83 Chinese Cases with OCRL Mutations
Lingxia Zhang1, Shugang Wang2, Ruoque Mao1
1Department of Nephrology, The Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China.
Genetics Research
|August 3, 2022
Summary
Mutations in the OCRL gene cause Lowe syndrome and Dent-2 disease. This study found that mutation type and location correlate with disease phenotype, aiding in genetic counseling for OCRL-related disorders.
Area of Science:
- Genetics
- Molecular Biology
- Clinical Medicine
Background:
- Lowe syndrome and Dent-2 disease share genetic origins, stemming from variants in the OCRL gene.
- The precise reasons for distinct clinical presentations in patients with similar OCRL gene mutations remain unclear.
Purpose of the Study:
- To investigate the genotype-phenotype correlation in Chinese patients with Lowe syndrome and Dent-2 disease.
- To determine if mutation type and location within the OCRL gene influence disease manifestation.
Main Methods:
- A cohort of 83 Chinese children with hemizygous pathogenic or likely pathogenic OCRL variants was analyzed.
- Chi-square tests were used to assess the relationship between mutation characteristics (type and location) and clinical phenotypes.
Main Results:
- Truncating OCRL mutations were significantly more frequent in Lowe syndrome (70.8%) compared to Dent-2 disease (31.4%).
- Mutations associated with Dent-2 disease were predominantly in Exon 2-12 (60.0%), whereas Lowe syndrome mutations were mainly in Exon 13-23 (81.3%).
Conclusions:
- OCRL mutation type and location are significant indicators of phenotype in Lowe syndrome and Dent-2 disease.
- Findings can enhance the interpretation of novel OCRL variants and improve genetic counseling.
- Further international collaboration is recommended for comprehensive genotype-phenotype correlation analysis.
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