Dual examinations for identification of urine as being of human origin and for DNA-typing from small stains of human urine

J Forensic Sci. 2008 Mar;53(2):359-63. doi: 10.1111/j.1556-4029.2008.00675.x.

Abstract

Concurrent methods for identification of urine as being of human origin, and for DNA-typing from small stains of human urine were examined. A urine stain was extracted with phosphate-buffered saline (PBS), and the extract was filtered using a Centricon-100 device. The filtrate was subjected to electrospray ionization liquid chromatography-mass spectrometry (ESI-LC-MS) for identification of human urine and a DNA-typing sample was obtained by dialfiltration of the residue using a DNA purification kit. After the purified residue was treated with an AmpflSTR Profiler PCR amplification kit, the DNA-types were analyzed by capillary electrophoresis using a Genetic Analyzer. It was possible to identify a urine stain as being of human origin, and complete DNA profiles could be successfully obtained from a urine stain which had been created by 50 microL of female urine. Serial analyses of urine stains found at a crime scene provide effective information for forensic investigation. This method is recommended for stain identification and for DNA-typing from a urine stain.

MeSH terms

  • 17-Ketosteroids / urine
  • DNA / urine*
  • DNA Fingerprinting / methods*
  • Female
  • Gas Chromatography-Mass Spectrometry
  • Humans
  • Polymerase Chain Reaction
  • Spectrometry, Mass, Electrospray Ionization

Substances

  • 17-Ketosteroids
  • DNA