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Individual shedder ...
Individual shedder status and the origin of touch DNA
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- Jansson, Linda (författare)
- Lund University,Lunds universitet,Teknisk mikrobiologi,Centrum för tillämpade biovetenskaper,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Applied Microbiology,Center for Applied Life Sciences,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Swedish Police Authority,Swedish Police Author, Natl Forens Ctr, Linkoping, Sweden; Lund Univ, Sweden
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- Swensson, Marie (författare)
- Lund University,Lund Univ, Sweden
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- Gifvars, Emma (författare)
- Lund University,Lund Univ, Sweden
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- Hedell, Ronny (författare)
- Swedish Police Authority,Swedish Police Author, Natl Forens Ctr, Linkoping, Sweden
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- Forsberg, Christina (författare)
- Swedish Police Authority,Swedish Police Author, Natl Forens Ctr, Linkoping, Sweden
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- Ansell, Ricky (författare)
- Linköpings universitet,Linköping University,Swedish Police Authority,Biologi,Tekniska fakulteten,Swedish Police Author, Natl Forens Ctr, Linkoping, Sweden
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- Hedman, Johannes (författare)
- Lund University,Lunds universitet,Teknisk mikrobiologi,Centrum för tillämpade biovetenskaper,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Applied Microbiology,Center for Applied Life Sciences,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Swedish Police Authority,Swedish Police Author, Natl Forens Ctr, Linkoping, Sweden; Lund Univ, Sweden
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(creator_code:org_t)
- Elsevier BV, 2022
- 2022
- Engelska.
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Ingår i: Forensic Science International: Genetics. - : Elsevier BV. - 1872-4973 .- 1878-0326. ; 56
- Relaterad länk:
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http://dx.doi.org/10... (free)
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http://www.fsigeneti...
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https://liu.diva-por... (primary) (Raw object)
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Due to improved laboratory techniques, touched surfaces and items are increasingly employed as sources of forensic DNA evidence. This has urged a need to better understand the mechanisms of DNA transfer between individuals. Shedder status (i.e. the propensity to leave DNA behind) has been identified as one major factor regulating DNA transfer. It is known that some individuals tend to shed more DNA than others, but the mechanisms behind shedder status are largely unknown. By comparing the amounts of DNA deposited from active hands (i.e. used “as usual”) and inactive hands (i.e. not allowed to touch anything), we show that some of the self-DNA deposited from hands is likely to have accumulated on hands from other parts of the body or previously handled items (active hands: 2.1 ± 2.7 ng, inactive hands: 0.83 ± 1.1 ng, paired t-test: p = 0.014, n = 27 pairs of hands). Further investigation showed that individual levels of deposited DNA are highly associated with the level of DNA accumulation on the skin of the face (Pearson's correlation: r = 0.90, p < 0.00001 and Spearman's ranked correlation: rs = 0.56, p = 0.0016, n = 29). We hypothesized that individual differences in sebum secretion levels could influence the amount of DNA accumulation in facial areas, but no such correlation was seen (Pearson's correlation: r = − 0.13, p = 0.66, n = 14). Neither was there any correlation between DNA levels on hands or forehead and the time since hand or face wash. We propose that the amount of self-DNA deposited from hands is highly influenced by the individual levels of accumulated facial DNA, and that cells/DNA is often transferred to hands by touching or rubbing one's face.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Annan medicin och hälsovetenskap -- Rättsmedicin (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Other Medical and Health Sciences -- Forensic Science (hsv//eng)
- NATURVETENSKAP -- Biologi -- Genetik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Genetics (hsv//eng)
Nyckelord
- DNA deposition
- DNA transfer
- Forensic DNA analysis
- Sebum
- Shedder status
- DNA deposition; DNA transfer; Forensic DNA analysis; Sebum; Shedder status
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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