Related Experiment Video
Updated: May 9, 2026
06:53
Detection and Monitoring of Tumor Associated Circulating DNA in Patient Biofluids
Published on: June 8, 2019
MS-MLPA analysis for FMR1 gene: evaluation in a routine diagnostic setting
Valentina Gatta1, Elena Gennaro, Sara Franchi
1Laboratory of Molecular Genetics, Department of Psychological, Humanities and Territorial Sciences, School of Medicine and Health Sciences, G, d'Annunzio University, via dei Vestini 31, Chieti, 66013, Italy. v.gatta@unich.it
BMC Medical Genetics
|August 7, 2013
Summary
Methylation-Specific Multiplex-Ligation-dependent Probe Amplification (MS-MLPA) is a robust assay for diagnosing Fragile X Syndrome (FXS) in males. However, it yields unreliable results for females, necessitating separate diagnostic workflows.
Area of Science:
- Genetics
- Molecular Biology
- Medical Diagnostics
Background:
- Fragile X Syndrome (FXS) is a common cause of inherited intellectual disability.
- FXS is caused by CGG repeat expansion in the FMR1 gene, leading to promoter hypermethylation.
- Traditional Southern Blot analysis for FXS is time-consuming and low-throughput.
Purpose of the Study:
- To evaluate the Methylation-Specific Multiplex-Ligation-dependent Probe Amplification (MS-MLPA) assay for FXS diagnosis.
- To assess the feasibility and impact of MS-MLPA in a routine laboratory setting.
Main Methods:
- Retrospective analysis of 44 male patients, 10 CVS samples, and 10 females previously tested by Southern Blot.
- Prospective study of 98 males, 20 females, and 1 CVS sample.
- Assessing MS-MLPA for methylation status and CGG repeat sizing of the FMR1 gene.
Main Results:
- MS-MLPA demonstrated robustness and reproducibility in detecting methylation status in male samples, including CVS.
- The assay correctly identified normal and full mutation male samples.
- MS-MLPA analysis yielded unreliable results for female samples.
Conclusions:
- A separate diagnostic workflow is recommended for male and female patients with suspected FXS.
- MS-MLPA combined with FMR1 PCR provides a reliable protocol for molecular diagnosis of FXS in males.
- The study highlights the need for sex-specific approaches in FXS molecular diagnostics.
