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Differences of microRNA expression profiles between monozygotic twins' blood samples
Chao Xiao1, Chao Pan1, Erliang Liu2
1Department of Forensic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China.
Forensic Science International. Genetics
|May 28, 2019
Summary
Distinguishing identical twins is challenging. This study found differences in microRNA (miRNA) expression within monozygotic (MZ) twin pairs, suggesting miRNAs can serve as biomarkers for twin identification.
Area of Science:
- Genetics
- Molecular Biology
- Forensic Science
Background:
- Monozygotic (MZ) twins are genetically identical, making traditional DNA typing insufficient for discrimination.
- MicroRNAs (miRNAs) are small non-coding RNAs regulating gene expression and involved in various biological processes.
- Forensic identification of MZ twins presents a significant challenge due to their identical DNA.
Purpose of the Study:
- To investigate differential microRNA expression within MZ twin pairs.
- To identify potential miRNA biomarkers for distinguishing MZ twins.
Main Methods:
- MicroRNA microarray analysis of seven healthy MZ twin pairs (different sex and age).
- Validation of differentially expressed miRNAs using real-time quantitative reverse transcription-polymerase chain reaction (qRT-PCR).
Main Results:
- A total of 545 differentially expressed miRNAs were identified across MZ twin pairs.
- A subset of differentially expressed miRNAs was consistently found across multiple twin pairs.
- qRT-PCR confirmed differential expression for specific miRNAs (e.g., miR-151a-3p, miR-142-3p).
Conclusions:
- Significant differences in miRNA expression exist within MZ twin pairs.
- MicroRNAs show promise as novel biomarkers for MZ twin identification in forensic applications.