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Published on: February 21, 2015
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[Accurate detection of a case with Angelman syndrome (type 1) using SNP array]
Shanshan Shi1, Shaobin Lin, Yanfen Liao
1Fetal Medicine Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong 510630, China. mood0904@aliyun.com.
Summary
Single nucleotide polymorphism (SNP) array analysis identified a maternal deletion at 15q11.2q13.1 in a patient with Angelman syndrome (AS). This confirms SNP array
Area of Science:
- Genetics
- Molecular Biology
- Developmental Biology
Background:
- Angelman syndrome (AS) is a neurodevelopmental disorder often caused by deletions in the 15q11q13 region.
- Accurate diagnosis and understanding genotype-phenotype correlations are crucial for AS management.
Observation:
- A child presented with congenital malformations, intellectual disability, and developmental delay.
- G-banded karyotyping, SNP array, and FISH analysis were performed.
Findings:
- SNP array detected a de novo 6.053 Mb deletion at 15q11.2q13.1 of maternal origin.
- The deletion encompassed the critical region for AS (type 1).
- Mendelian error checking confirmed the maternal inheritance of the deletion.
Implications:
- SNP array technology accurately defines chromosomal microdeletions, aiding AS diagnosis.
- This case highlights the utility of SNP array in understanding AS genotype-phenotype correlations.
- Advanced genetic analysis improves diagnostic precision for complex neurodevelopmental disorders.
