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                            Library & Multimedia
 Successful nuclear DNA profiling of rootless hair shafts: a novel approach
NCJ Number
              253237
Journal

*International Journal of Legal Medicine* Volume: 132 Issue: 1 Dated: 2018 Pages: 107-115
Author(s)
          Kelly S. Grisedale;
                        Hiromi Brown;
                        Gina M. Murphy;
                        Mark R. Wilson;
                        Sudhir K. Sinha
Date Published

2018
Length
              9 pages
Annotation
              This study used an enhanced DNA extraction methodology for hairs, in combination with a recently developed novel, nuclear DNA typing assay, InnoTyper 21, to improve the success rate for obtaining informative results from highly compromised, degraded, and trace forensic samples such as rootless hair shafts.
Abstract
              Historically, rootless hair shaft samples submitted to a forensic laboratory for DNA analysis are reserved for mitochondrial DNA (mtDNA) analysis due to the presence of highly degraded as well as insufficient amounts of nuclear DNA. Although mtDNA has been very successful in obtaining results from rootless hair, this system has its limitations, namely, it is a lineage marker that cannot differentiate between maternally related genotypes. Given the high incidence of hairs as forensic evidence, there is a need for the use of a nuclear DNA test system capable of producing reliable results for hair shaft forensic evidence. The InnoTyper 21 kit is a small amplicon retrotransposon marker typing system compatible with currently used capillary electrophoresis platforms. This system contains 20 Alu element markers, ranging in size from 60 to 125 bp, making the assay highly sensitive for extremely degraded forensic samples and thus enabling recovery of nuclear DNA profiles from samples that would otherwise require mtDNA sequencing. A subset of samples was also tested with the GlobalFiler kit with less success due to the larger amplicon sizes in comparison with InnoTyper 21. Results were variable but very promising, with approximately 40 percent of the total number of hairs tested producing interpretable nuclear DNA profiles with InnoTyper 21. These results demonstrate the ability of the utilized methodologies to produce nuclear DNA results with high statistical power from rootless hair shafts. 20 references (publisher abstract modified)
      
  
          Additional Details
Grant Number(s)
        2013-DN-BX-K014


  
  
        
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        NIJ-Sponsored


  
  
        
  Publication Type
        Research (Applied/Empirical)
                                Report (Study/Research)
                                Report (Grant Sponsored)
                                Program/Project Description


  
  
        
  Award
        Assessing Sample Preparation Methods for Emerging DNA Sequencing Technologies in Human Forensic mtDNA Analysis Applications
    
  
  
Date Published: January 1, 2018
    
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