mRNA profiling for body fluid identification by reverse transcription endpoint PCR and realtime PCR

Area of Science:

• Forensic Science
• Molecular Biology
• Biochemistry

Background:

• mRNA profiling presents a novel approach for identifying body fluids in biological stains.
• Key advantages include multiplex detection and simultaneous DNA isolation without material loss.

Purpose of the Study:

• To establish and evaluate reverse transcription endpoint and realtime polymerase chain reaction (PCR) assays for body fluid identification.
• To compare the efficacy of these mRNA-based methods against conventional enzymatic and immunologic tests.

Main Methods:

• Development of reverse transcription endpoint PCR and realtime PCR assays.
• Creation of two novel multiplex PCR assays for screening and specific detection of body fluids.
• Comparison with conventional enzymatic and immunologic identification methods.

Main Results:

• Satisfying specificity, sensitivity, and suitability for biological stains were achieved.
• Demonstrated mRNA stability in stains up to two years old.
• Both endpoint and realtime PCR assays proved effective for body fluid identification in forensic stains.

Conclusions:

• mRNA profiling via endpoint and realtime PCR is a viable alternative to conventional methods for forensic body fluid identification.
• The developed multiplex assays enhance efficiency and capability in forensic analysis.