DNA quantification of blood samples pre-treated with pyramidon / 法医学杂志

OBJECTIVE@#To study DNA quantification and STR typing of samples pre-treated with pyramidon.@*METHODS@#The blood samples of ten unrelated individuals were anticoagulated in EDTA. The blood stains were made on the filter paper. The experimental groups were divided into six groups in accordance with the storage time, 30 min, 1 h, 3 h, 6 h, 12 h and 24h after pre-treated with pyramidon. DNA was extracted by three methods: magnetic bead-based extraction, QIAcube DNA purification method and Chelex-100 method. The quantification of DNA was made by fluorescent quantitative PCR. STR typing was detected by PCR-STR fluorescent technology.@*RESULTS@#In the same DNA extraction method, the sample DNA decreased gradually with times after pre-treatment with pyramidon. In the same storage time, the DNA quantification in different extraction methods had significant differences. Sixteen loci DNA typing were detected in 90.56% of samples.@*CONCLUSION@#Pyramidon pre-treatment could cause DNA degradation, but effective STR typing can be achieved within 24 h. The magnetic bead-based extraction is the best method for STR profiling and DNA extraction.

Estudio histopatológico del hígado de ratas tratadas con aminopirina y nitrito de sodio / Histopathologic study of the liver of rat treated with aminopyrine and sodium nitrite

Se informa que entre los productos que contienen aminas terciarias se encuentra la aminopirina, conocida como el analgésico piramidón, la cual es fácilmente nitrosable en condiciones de pH moderadamente ácido. Se expresa que el compuesto resultante de la nitrosación es la dimetilnitrosamina (DMN), un agente altamente hepatotóxido y carcinogénico, especialmente al nivel del hígado, donde es metabolizado. Se señala que el modelo experimental, mediante la utilización de ratas albinas hembras con un peso de 100 a 140 g, a las cuales les fue administrada diariamente la aminopirina y el nitrito de sodio aisladamente y en combinación, durante 35 días, confirma la hepatotoxicidad de la combinación, de acuerdo con los cambios hísticos observados que corresponden a alteraciones del tipo cirrótico