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Souza CA, Oliveira TC, Crovella S, Santos SM, Rabêlo KCN, Soriano EP, Carvalho MVD, Junior AFC, Porto GG, Campello RIC, Antunes AA, Queiroz RA, Souza SM. Validation of a reaction volume reduction protocol for analysis of Y chromosome haplotypes targeting DNA databases. Genet Mol Res 2017; 16:gmr-16-02-gmr.16029652. [PMID: 28453177 DOI: 10.4238/gmr16029652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The use of Y chromosome haplotypes, important for the detection of sexual crimes in forensics, has gained prominence with the use of databases that incorporate these genetic profiles in their system. Here, we optimized and validated an amplification protocol for Y chromosome profile retrieval in reference samples using lesser materials than those in commercial kits. FTA® cards (Flinders Technology Associates) were used to support the oral cells of male individuals, which were amplified directly using the SwabSolution reagent (Promega). First, we optimized and validated the process to define the volume and cycling conditions. Three reference samples and nineteen 1.2 mm-diameter perforated discs were used per sample. Amplification of one or two discs (samples) with the PowerPlex® Y23 kit (Promega) was performed using 25, 26, and 27 thermal cycles. Twenty percent, 32%, and 100% reagent volumes, one disc, and 26 cycles were used for the control per sample. Thereafter, all samples (N = 270) were amplified using 27 cycles, one disc, and 32% reagents (optimized conditions). Data was analyzed using a study of equilibrium values between fluorophore colors. In the samples analyzed with 20% volume, an imbalance was observed in peak heights, both inside and in-between each dye. In samples amplified with 32% reagents, the values obtained for the intra-color and inter-color standard balance calculations for verification of the quality of the analyzed peaks were similar to those of samples amplified with 100% of the recommended volume. The quality of the profiles obtained with 32% reagents was suitable for insertion into databases.
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Affiliation(s)
- C A Souza
- Laboratório de Perícia e Pesquisa em Genética Forense, Secretaria de Defesa Social de Pernambuco, , Brasil.,Programa de Mestrado em Perícias Forenses, , , Brasil
| | - T C Oliveira
- Laboratório de Perícia e Pesquisa em Genética Forense, Secretaria de Defesa Social de Pernambuco, , Brasil.,Laboratório de Imunopatologia Keizo Asami, , , Brasil
| | - S Crovella
- Laboratório de Imunopatologia Keizo Asami, , , Brasil
| | - S M Santos
- Gerência Geral de Polícia Científica, Secretaria de Defesa Social de Pernambuco, , Brasil
| | - K C N Rabêlo
- Laboratório de Perícia e Pesquisa em Genética Forense, Secretaria de Defesa Social de Pernambuco, , Brasil.,Gerência Geral de Polícia Científica, Secretaria de Defesa Social de Pernambuco, , Brasil
| | - E P Soriano
- Programa de Mestrado em Perícias Forenses, , , Brasil .,, , Brasil
| | | | | | - G G Porto
- Programa de Mestrado em Perícias Forenses, , , Brasil
| | | | - A A Antunes
- Programa de Mestrado em Perícias Forenses, , , Brasil
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Queiroz RA, Soriano EP, Carvalho MVD, Caldas-Junior AF, Souza EHA, Coelho-Junior LGTM, Campello RIC, Almeida AC, Farias RCAP, Vasconcellos A. First forensic records of termite activity on non-fossilized human bones in Brazil. BRAZ J BIOL 2016; 0:0. [PMID: 27463832 DOI: 10.1590/1519-6984.11415] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 11/19/2015] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to describe the first records of termite activity on non-fossilized human bones in Brazil. The cases reported in this study resulted from forensic analysis of six human skeletons found in northeastern Brazil between 2012 and 2014. Traces of tunnels and nests commonly produced by termites were found on several human bone surfaces as well as the specimens and characteristic signs of osteophagic activity. In four cases, the species were identified: Amitermes amifer Silvestri, 1901, Nasutitermes corniger (Motschulsky, 1855) (on two skeletons), and Microcerotermes indistinctus Mathews, 1977. In two other cases, the activity of termites on bone surfaces was evidenced by remains of nests and tunnels produced by these insects. At least in the samples of human remains available for this report, the number of termites collected was greater on bones found during autumn, the rainy season in the Northeast of Brazil. The human bones examined showed termites like insects with lots of strength at bone degradation, capable of continuing the process of decomposition of human remains even in completely skeletonized bodies.
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Affiliation(s)
- R A Queiroz
- Núcleo de Medicina e Odontologia Legal - NUMOL, R. Antônio Teotônio, s/n, CEP 58071-620, João Pessoa, PB, Brazil
| | - E P Soriano
- Núcleo de Medicina e Odontologia Legal - NUMOL, R. Antônio Teotônio, s/n, CEP 58071-620, João Pessoa, PB, Brazil.,Universidade de Pernambuco - UPE, Av. Gal Newton Cavalcanti, 1650, CEP 54753-220, Camaragibe, PE, Brazil
| | - M V D Carvalho
- Universidade de Pernambuco - UPE, Av. Gal Newton Cavalcanti, 1650, CEP 54753-220, Camaragibe, PE, Brazil.,Instituto de Medicina Legal Antônio Persivo Cunha - IMLAPC, Recife, PE, Brazil
| | - A F Caldas-Junior
- Universidade de Pernambuco - UPE, Av. Gal Newton Cavalcanti, 1650, CEP 54753-220, Camaragibe, PE, Brazil
| | - E H A Souza
- Universidade de Pernambuco - UPE, Av. Gal Newton Cavalcanti, 1650, CEP 54753-220, Camaragibe, PE, Brazil
| | - L G T M Coelho-Junior
- Universidade de Pernambuco - UPE, Av. Gal Newton Cavalcanti, 1650, CEP 54753-220, Camaragibe, PE, Brazil
| | - R I C Campello
- Universidade de Pernambuco - UPE, Av. Gal Newton Cavalcanti, 1650, CEP 54753-220, Camaragibe, PE, Brazil
| | - A C Almeida
- Universidade de Pernambuco - UPE, Av. Gal Newton Cavalcanti, 1650, CEP 54753-220, Camaragibe, PE, Brazil
| | - R C A P Farias
- Universidade Federal da Paraíba - UFPB, Cidade Universitária, CEP 58051-900, João Pessoa, PB, Brazil
| | - A Vasconcellos
- Universidade Federal da Paraíba - UFPB, Cidade Universitária, CEP 58051-900, João Pessoa, PB, Brazil
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