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Lawas M, Otterstatter LM, Forger LV, Gray JE, Donfack J. A quantitative method for selecting a hair for nulear DNA analysis. Forensic Sci Int Genet 2020; 48:102354. [PMID: 32674031 DOI: 10.1016/j.fsigen.2020.102354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 06/30/2020] [Accepted: 07/06/2020] [Indexed: 01/28/2023]
Abstract
This study evaluated a quantitative method to predict the success of nuclear DNA (nuDNA) typing for head hair roots, using the minor-groove DNA binding dye, 4', 6-diamidino-2-phenylindole (DAPI). The procedure was successful in staining nuclear material in hair roots, regardless of soft tissue presence or growth phase. We found that the dye can even reveal an abundance of visible nuclei in hairs that were previously assumed to be unsuitable for nuDNA analysis (e.g., telogen hairs). The value of DAPI staining is particularly evident when considering the STR typing results for telogen hairs. Here, telogen hairs with greater than 100 visible nuclei frequently produced full or high-partial STR profiles, while telogen hairs with fewer than 100 visible nuclei rarely resulted in >20 % STR allele recovery. In addition, our findings indicated no interference by DAPI in the forensic examination of hair evidence, including preparation of hairs on microscopic slides, microscopic examination, DNA extraction, quantitative PCR, and short tandem repeat (STR) typing. Furthermore, the method remained steadfast for hairs washed by sonication as well as hairs retrieved from Permount™ mounting medium. When validated, this simple, quick, and quantitative screening method can be used in casework to select a hair for nuDNA analysis, especially for hairs that were previously sent directly for mitochondrial (mt) DNA analysis based on the lack of adhering soft tissue, regardless of growth phase. Conversely, nuDNA degradation may exist in hairs which exhibit microscopic characteristics typically associated with a potential to generate successful nuclear DNA profile including stretched roots with attached root sheath. DAPI staining of hairs gives forensic examiners the ability to have more information, other than growth phase, when selecting a hair or hairs for possible nuDNA analysis.
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Affiliation(s)
- Maria Lawas
- Visiting Scientist Program, 2501 Investigation Parkway, Quantico, VA, 22135, United States; Federal Bureau of Investigation Laboratory Division, 2501 Investigation Parkway, Quantico, VA, 22135, United States
| | - Linda M Otterstatter
- Trace Evidence Unit, 2501 Investigation Parkway, Quantico, VA, 22135, United States; Federal Bureau of Investigation Laboratory Division, 2501 Investigation Parkway, Quantico, VA, 22135, United States
| | - Luisa V Forger
- Visiting Scientist Program, 2501 Investigation Parkway, Quantico, VA, 22135, United States; Federal Bureau of Investigation Laboratory Division, 2501 Investigation Parkway, Quantico, VA, 22135, United States
| | - Jade E Gray
- DNA Casework Unit, 2501 Investigation Parkway, Quantico, VA, 22135, United States; Federal Bureau of Investigation Laboratory Division, 2501 Investigation Parkway, Quantico, VA, 22135, United States
| | - Joseph Donfack
- Research and Support Unit, 2501 Investigation Parkway, Quantico, VA, 22135, United States; Federal Bureau of Investigation Laboratory Division, 2501 Investigation Parkway, Quantico, VA, 22135, United States.
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Aleksandrova VY, Bogatyreva EA, Kuklev MY, Lapenkov MI, Plakhina NV. [The aspects of the molecular-genetic investigations of human hair depending on its morphological characteristics. I. Prognostic screening]. Sud Med Ekspert 2019; 62:13-16. [PMID: 30724887 DOI: 10.17116/sudmed20196201113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The objective of the present work was to develop the method for the selection of hairs suitable for the molecular-genetic investigation of nuclear DNA. It was proposed to distinguish between five groups of hair depending on its growth phase, the presence or absence of epithelial tissues at the root terminus. An algorithm was developed for carrying out prognostic screening including the morphological and cytomorphological investigations the results of which can be used to evaluate the possibility for further genotyping.
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Affiliation(s)
- V Yu Aleksandrova
- Institute of Criminal Science, Centre of Special Technologies, Federal Security Service of the Russia, Moscow, Russia, 101000
| | - E A Bogatyreva
- Institute of Criminal Science, Centre of Special Technologies, Federal Security Service of the Russia, Moscow, Russia, 101000
| | - M Yu Kuklev
- Institute of Criminal Science, Centre of Special Technologies, Federal Security Service of the Russia, Moscow, Russia, 101000
| | - M I Lapenkov
- Institute of Criminal Science, Centre of Special Technologies, Federal Security Service of the Russia, Moscow, Russia, 101000
| | - N V Plakhina
- Institute of Criminal Science, Centre of Special Technologies, Federal Security Service of the Russia, Moscow, Russia, 101000
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Lee SY, Ha EJ, Woo SK, Lee SM, Lim KH, Eom YB. A rapid nuclear staining test using cationic dyes contributes to efficient STR analysis of telogen hair roots. Electrophoresis 2017; 38:1771-1779. [PMID: 28401988 DOI: 10.1002/elps.201700024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 04/05/2017] [Accepted: 04/05/2017] [Indexed: 11/10/2022]
Abstract
Telogen hairs presented in the crime scene are commonly encountered as trace evidence. However, short tandem repeat (STR) profiling of the hairs currently have low and limited use due to poor success rate. To increase the success rate of STR profiling of telogen hairs, we developed a rapid and cost-effective method to estimate the number of nuclei in the hair roots. Five cationic dyes, Methyl green (MG), Harris hematoxylin (HH), Methylene blue (MB), Toluidine blue (TB), and Safranin O (SO) were evaluated in this study. We conducted a screening test based on microscopy and the percentage of loss with nuclear DNA, in order to select the best dye. MG was selected based on its specific nuclei staining and low adverse effect on the hair-associated nuclear DNA. We examined 330 scalp and 100 pubic telogen hairs with MG. Stained hairs were classified into five groups and analyzed by STR. The fast staining method revealed 70% (head hair) and 33.4% (pubic hair) of full (30 alleles) and high partial (18-29 alleles) STR profiling proportion from the lowest nuclei count group (one to ten nuclei). The results of this study demonstrated a rapid, specific, nondestructive, and high yield DNA profiling method applicable for screening telogen hairs.
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Affiliation(s)
- So-Yeon Lee
- Department of Medical Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, Republic of Korea
| | - Eun-Ju Ha
- Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, Republic of Korea
| | - Seung-Kyun Woo
- Department of Medical Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, Republic of Korea
| | - So-Min Lee
- Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, Republic of Korea
| | - Kyung-Hee Lim
- Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, Republic of Korea
| | - Yong-Bin Eom
- Department of Medical Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, Republic of Korea.,Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, Republic of Korea
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