New cell separation technique for the isolation and analysis of cells from biological mixtures in forensic caseworks

Croat Med J. 2011 Jun;52(3):293-8. doi: 10.3325/cmj.2011.52.293.

Abstract

Aim: To isolate mucosal cells of the perpetrator in a sexual assault case from a complex mixture of his mucosal cells and the victim's skin by micromanipulation prior to genomic analysis.

Methods: To capture and analyze mucosal cells we used the micromanipulation with on-chip low volume polymerase chain reaction (LV-PCR). Consensus DNA profiles were generated from 5 replicate experiments.

Results and conclusions: We validated the use of micromanipulation with on-chip LV-PCR for genomic analysis of complex biological mixtures in a fatal rape case. The perpetrator's mucosal cells were captured from nipple swabs of the victim, and a single-source DNA profile was generated from cell mixtures. These data suggest that micromanipulation with on-chip LV-PCR is an effective forensic tool for the analysis of specific cells from complex samples.

Publication types

  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Cell Separation / instrumentation
  • Cell Separation / methods*
  • Crime
  • DNA / analysis
  • Electrophoresis
  • Forensic Sciences / instrumentation
  • Forensic Sciences / methods*
  • Genetic Markers
  • Genotype
  • Homicide / statistics & numerical data*
  • Humans
  • Microsatellite Repeats / genetics*
  • Rape / statistics & numerical data*

Substances

  • Genetic Markers
  • DNA