A Novel Loop-mediated Isothermal Amplification Method for Identification of Four Body Fluids with Smart Phone Detection

Publication date: Available online 23 November 2019Source: Forensic Science International: GeneticsAuthor(s): Kimberly R. Jackson, Tiffany Layne, David A. Dent, Anchi Tsuei, Jingyi Li, Dorris M. Haverstick, James P. LandersAbstractMessenger RNA profiling for body fluid identification (bfID) is a useful approach to collect contextual information associated with a crime. Current methods require costly fluorescent probes, lengthy amplification protocols and/or time-consuming sample preparation. To simplify this process, we developed a bfID method that has the potential to be rapid in analysis time, inexpensive and fluorescence-free, combining a universal operating procedure with a high-throughout (microwell plate) platform for simultaneous detection of mRNA markers from whole blood, semen, saliva, and vaginal fluid. Full bfID sample preparation and analysis of 23 samples was completed in under 3 hours using smart phone optical detection and analysis and show efficacy of the method in a validated blind study. The results provide an efficient, sensitive and specific approach to supplement the current biochemical tests in a forensic laboratory.Graphical abstract
Source: Forensic Science International: Genetics - Category: Forensic Medicine Source Type: research