Related Experiment Video
Updated: Sep 26, 2025

Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
Published on: April 4, 2018
[Analysis of ADNP gene variant in a child with Helsmoortel-van der Aa syndrome]
Jian Ma1, Haixia Ma, Kaihui Zhang
1Jinan Pediatric Research Institute, Children' s Hospital Affiliated to Shandong University, Jinan, Shandong 250022, China. liuyi-ly@126.com.
Objective:
To explore the genetic basis for a child manifesting with intellectual disability, language delay and autism spectrum disorder.
Methods:
Genomic DNA was extracted from peripheral blood samples of the child and his family members, and subjected to whole exome sequencing. Candidate variants were verified by Sanger sequencing and interpreted according to the guidelines of the American College of Medical Genetics and Genomics.
Results:
The child was found to harbor a heterozygous c.568C>T (p.Q190X) nonsense variant of the ADNP gene, which was not detected in either parent by Sanger sequencing.
Conclusion:
The clinical and genetic testing both suggested that the child has Helsmoortel-van der Aa syndrome due to ADNP gene mutation, which is extremely rare in China.
Related Concept Videos
Comparing Copy Number Variations and SNPs
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Human Genetics
The complex relationship between genetics and psychology is observable through common biological components such...
Genome-wide Association Studies-GWAS
GWAS does not require the identification of the target gene involved in...
Incomplete Dominance
Genetic Lingo
Epistasis Analysis

