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- W1963515901 abstract "AimTo evaluate the effect of genetic instability and degradation in archived histology samples from cancerous tumors and to investigate the validity of short tandem repeat (STR) typing of these samples and its potential effect on human identification.MethodsTwo hundred and twenty eight slides of archival pathology tissues from 13 different types of malignant tumors were compared with healthy tissues from the same individuals. DNA analysis was performed using standard techniques for forensic STR analysis, PowerPlex®16 and Identifiler® on 2 distinct sample sets. Genetic instability was assessed by comparing reference tissues with cancerous tissues derived from the same individual. Loss of heterozygosity, a ≥50% reduction in heterozygosity ratio between healthy and diseased samples, and microsatellite instability, the presence of an additional allele not present in reference tissue, were assessed. The quality of profiles obtained with respect to completeness among the archived samples and degradation using the 2 platforms were also compared.ResultsProfiles obtained using the Identifiler® system were generally more complete, but showed 3-fold higher levels of instability (86%) than those obtained using PowerPlex® 16 (27%). Instances of genetic instability were distributed throughout all loci in both multiplex STR systems.ConclusionAfter having compared 2 widely used forensic chemistries, we suggest individual validation of each kit for use with samples likely to exhibit instability combined with fixation induced degradation or artifact. A “one size fits all” approach for interpretation of these samples among commercially available multiplexes is not recommended." @default.
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- W1963515901 date "2009-06-01" @default.
- W1963515901 modified "2023-10-18" @default.
- W1963515901 title "Malignant Tumors and Forensics – Dilemmas and Proposals" @default.
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- W1963515901 doi "https://doi.org/10.3325/cmj.2009.50.218" @default.
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