RNA-based short tandem repeat analysis on the D18S51 locus

Area of Science:

• Forensic Science
• Molecular Biology
• Genetics

Background:

• Short tandem repeat (STR) analysis is a cornerstone of forensic human identification.
• Some STR loci are located within introns and are transcribed into pre-messenger RNA (pre-mRNA).
• The potential of using RNA for forensic STR analysis remains largely unexplored.

Purpose of the Study:

• To investigate the feasibility of RNA-based STR analysis for human identification.
• To explore the stability and utility of RNA in forensic samples for genetic analysis.
• To test RNA-based STR profiling using the D18S51 locus as a model system.

Main Methods:

• Investigated the presence and integrity of STR information within RNA extracted from forensic samples.
• Utilized the D18S51 locus, known to contain STRs within its intronic regions, as a model.
• Assessed the potential for RNA-based STR typing under various forensic conditions.

Main Results:

• Demonstrated that STR information can be successfully obtained from RNA.
• Confirmed the relative stability of RNA in forensic samples, particularly under dry and low-temperature conditions.
• Validated the use of the D18S51 locus for RNA-based STR analysis.

Conclusions:

• RNA represents a viable alternative source for STR analysis in forensic investigations.
• RNA-based STR typing offers potential advantages due to RNA stability in challenging forensic environments.
• This research opens new possibilities for human identification using RNA in forensic science.