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Comparison of Single Piece of Dandruff DNA Extraction under Microscope and EZ-tape Method / 法医学杂志
Journal of Forensic Medicine ; (6): 401-404, 2018.
Artículo en Inglés | WPRIM | ID: wpr-984952
ABSTRACT
OBJECTIVES@#To collect single piece of dandruff with microscopes to improve the regular EZ-tape method for DNA extraction and genotyping, increase the utilization of samples, reduce the miss rate as well as the proportion of genotyping results of mixed stains.@*METHODS@#The insides of the hats worn by two volunteers were stuck by EZ-tape and scotch tape respectively. DNA on EZ-tape was directly extracted using traditional method. Single piece of dandruff was collected from the scotch tapes under microscope. The two kinds of methods were both performed under continuous oscillation and standing digestion, respectively. DNA was extracted through Chelex-100 method, and STR genotypes were obtained after amplification and electrophoresis. The results of STR genotypes obtained by EZ-tape method and single piece of dandruff analytical method were compared.@*RESULTS@#Miss detections happened in 11 samples (45.8%) by EZ-tape method and only single-source typing results were obtained. Ten samples (41.7%) showed the genotype results of mixed stain and six of which showed allele insertions and deletions. The genotype results were obtained successfully using the single piece of dandruff analytical method, and two samples showed mixed stain genotype. The number of exact typing processed by oscillation was higher than that by standing digestion ( P<0.05).@*CONCLUSIONS@#The oscillation during the DNA extraction process is in favour of the DNA releasing. Single piece of dandruff analytical method can be used to obtain single-source STR genotype with high successful ratio and low miss rate. This method can be a collection method of special samples such as dandruff in forensic practice.
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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Resinas Sintéticas / ADN / Dermatoglifia del ADN / Repeticiones de Microsatélite / Alelos / Caspa / Genotipo Límite: Humanos Idioma: Inglés Revista: Journal of Forensic Medicine Año: 2018 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Resinas Sintéticas / ADN / Dermatoglifia del ADN / Repeticiones de Microsatélite / Alelos / Caspa / Genotipo Límite: Humanos Idioma: Inglés Revista: Journal of Forensic Medicine Año: 2018 Tipo del documento: Artículo