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Updated: May 12, 2026
An Electrochemiluminescence-Based Assay for MeCP2 Protein Variants
Published on: May 22, 2020
[Mutational analysis of the methyl-CpG-binding protein 2 (MECP2) gene in male autism patients]
San-mei Wang1, Ming Li, Yan-ling Yang
1Department of Pediatrics, Peking University First Hospital, Beijing 100034, China.
Objective:
To investigate mutations in the methyl-CpG-binding protein 2 (MECP2) gene in male autism patients by PCR, denaturing high-performance liquid chromatography (DHPLC) and sequencing to explore the role of mutations in MECP2 in autism patients.
Methods:
We recruited DNA samples from 44 male autism patients who matched the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DMS-IV) standards. DHPLC was used to screen the mutations in MECP2 gene, and DNA sequencing was performed for the samples with positive DHPLC results. The family members were further investigated in the patients with missense mutations in MECP2 gene.
Results:
Four cases were found to have mutations in MECP2 gene, including missense mutations of c.590C>T(T197M)in one case and c.602C>T(A201V)in one case, and synonymous mutations of c.1053C>G in one case and c.897C>T in one case. In addition, we found C>T variation in intron 3 at the +74 bp before exon 4, a SNP (rs2071569) usually detected in Chinese population. In the case with c.602C>T(A201V)mutation, his mother and maternal grandfather had the same mutation. His mother had normal phenotype, but his maternal grandfather had depressive disease.
Conclusion:
Mutations in MECP2 are present in male autism patients with relatively higher prevalence, suggesting that these mutations may play roles in the pathogenesis of autism.
Insights
Mutations in the methyl-CpG-binding protein 2 (MECP2) gene were identified in male autism patients. These MECP2 gene mutations may contribute to the development of autism spectrum disorder.
Area of Science:
- Genetics
- Neuroscience
- Developmental Biology
Context:
- Autism spectrum disorder (ASD) is a complex neurodevelopmental condition.
- The methyl-CpG-binding protein 2 (MECP2) gene plays a crucial role in neuronal development and function.
- Understanding the genetic underpinnings of ASD is essential for diagnosis and treatment.
Purpose:
- To investigate mutations in the MECP2 gene in male autism patients.
- To explore the potential role of MECP2 gene mutations in the pathogenesis of autism.
- To screen for MECP2 mutations using PCR, DHPLC, and sequencing.
Summary:
- This study analyzed DNA samples from 44 male autism patients.
- Four cases revealed mutations in the MECP2 gene, including missense and synonymous mutations.
- One patient with a c.602C>T(A201V) mutation had a mother with a normal phenotype and a maternal grandfather with depressive disease carrying the same mutation.
Impact:
- Identifies MECP2 gene mutations in a subset of male autism patients.
- Suggests a potential role for MECP2 mutations in the etiology of autism.
- Highlights the importance of genetic screening in autism research.
