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Hakim HM, Khan HO, Ismail SA, Ayob S, Lalung J, Kofi EA, Chambers GK, Edinur HA. Assessment of autosomal and male DNA extracted from casework samples using Casework Direct Kit, Custom and Maxwell 16 System DNA IQ Casework Pro Kit for autosomal-STR and Y-STR profiling. Sci Rep 2019; 9:14558. [PMID: 31601905 PMCID: PMC6787247 DOI: 10.1038/s41598-019-51154-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 09/25/2019] [Indexed: 11/26/2022] Open
Abstract
Short repetitive regions in autosomal and Y chromosomes known as short tandem repeats (STRs) are currently used for DNA profiling in crime investigations. However, DNA profiling requires a sufficient quality and quantity of DNA template, which is often not obtained from trace evidence or degraded biological samples collected at the scene of a crime. Here, we assessed autosomal and male DNA components extracted from crime scene and mock casework samples using the Casework Direct Kit, Custom and compared the results against those obtained by extraction of matching samples using well-established Maxwell 16 System DNA IQ Casework Pro Kit. The quantity and quality of extracted DNA obtained using both Casework Direct Kit, Custom and Maxwell 16 System DNA IQ Casework Pro Kit were analyzed using PowerQuant Systems followed by autosomal and Y-chromosome STR profiling using GlobalFiler Express PCR Amplification Kit and PowerPlex Y23 System, respectively. Our results showed that the Casework Direct Kit and Maxwell 16 DNA IQ Casework Pro Kit have more or less equal capacity to extract inhibitor free DNA, but that the latter produces slightly better quality and more DNA template and subsequently higher numbers of STR allele calls for autosomal and Y-STR analyses. Nonetheless, the Casework Direct Kit, Custom is the quicker and cheaper option for extraction of good, clean DNA from high content material and might best be used for extraction of reference samples. Such reference DNA samples typically come from buccal swabs or freshly drawn blood. So, in general, they can confidently be expected to have a high nucleic acid content and to be inhibitor-free.
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Affiliation(s)
- Hashom Mohd Hakim
- DNA Databank Division (D13), Criminal Investigation Department, Royal Malaysia Police, 43200, Cheras, Selangor, Malaysia. .,School of Industrial Technology, Universiti Sains Malaysia, 11800, Pulau Pinang, Malaysia.
| | - Hussein Omar Khan
- DNA Databank Division (D13), Criminal Investigation Department, Royal Malaysia Police, 43200, Cheras, Selangor, Malaysia
| | - Siti Afifah Ismail
- DNA Databank Division (D13), Criminal Investigation Department, Royal Malaysia Police, 43200, Cheras, Selangor, Malaysia
| | - Shahrizad Ayob
- DNA Databank Division (D13), Criminal Investigation Department, Royal Malaysia Police, 43200, Cheras, Selangor, Malaysia
| | - Japareng Lalung
- School of Industrial Technology, Universiti Sains Malaysia, 11800, Pulau Pinang, Malaysia
| | - Edward Abban Kofi
- Forensic Science Programme, School of Health Sciences, Universiti Sains Malaysia, Health Campus, 16150, Kubang Kerian, Kelantan, Malaysia.,Forensic Science Laboratory, Criminal Investigation Department, Ghana Police Service, P.O. Box 505, Accra, Ghana
| | - Geoffrey Keith Chambers
- School of Biological Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, New Zealand
| | - Hisham Atan Edinur
- Forensic Science Programme, School of Health Sciences, Universiti Sains Malaysia, Health Campus, 16150, Kubang Kerian, Kelantan, Malaysia. .,Institute of Tropical Biodiversity and Sustainable Development, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia. .,Environmental Futures Research Institute, Griffith University, Nathan, Queensland, 4111, Australia.
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