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We report the analysis of the synthetic cathinones α-pyrrolidinohexiophenone (α-PHP) and α-pyrrolidinopentiophenone (α-PVP), both pyrovalerone derivatives, in blood, urine, gastric contents, main tissues and hair of a deceased person. Qualitative and quantitative analyses were performed by LC–MS-MS. All the biological samples were collected during autopsy and extracted/purified onto a solid phase extraction cartridge before instrumental analysis. The method was validated for blood and urine and proved to be highly sensitive and specific for both the synthetic cathinones (limit of detection: 0.2 ng/mL and limit of quantification: 0.5 ng/mL). Analyses provided negative results for α-PVP in all biological samples except for the 2-cm proximal hair segment, confirming that the young man had consumed in the last 2 months this compound; instead hair analysis proved that the man was a heavy α-PHP user. α-PHP was identified and quantified in biological fluids and tissues. Interestingly, bile and urine concentrations (1.2 and 5.6 ng/mL, respectively) were fairly lower than blood collected into the thoracic cavity (15.3 ng/mL). The highest concentrations were measured for lung (71.1 ng/mL) and spleen (83.8 ng/mL). Concentrations of 3.5, 7.9, 4.7 and 23.6 ng/mL were measured in liver, kidney, brain and heart, respectively. Even if it is not possible to evaluate the presence of this drug in biological samples as a cause of death, to our knowledge, this is the first case of α-PHP finding in postmortem samples, and its potential toxic effects should be elucidated in the future. [ABSTRACT FROM AUTHOR]

Aliquid chromatographic tandem mass spectrometric method for the identification and quantification of 18 cardiovascular drugs was developed in order to evaluate two cases of fatal intoxication involving diltiazem and amlodipine respectively. Samples were simply diluted and centrifuged using a three-steps procedure with methanol, acetonitrile and mobile phase. The method proved to be selective and all the validation parameters fulfilled the acceptance criteria. In particular, linearity was studied in the range limits of quantitation (LOQ)-1,000 ng/mL (LOQ ranging from 0.8 to 33.3 ng/mL for urine and from 0.7 to 41.3 ng/mL for whole blood). The method was successfully applied to two real cases involving diltiazem and amlodipine fatal intoxications, respectively. Though the subject intoxicated by diltiazem did survive several hours after drug intake, central and peripheral blood levels at autopsy were extremely high (23.4 and 13.4 mg/L, respectively); the cause could be due to the formation of a pharmacobezoar that was found in the duodenum and that could have delayed the drug absorption. Moreover, diltiazem showed postmortem redistribution. On the contrary, the amlodipine peripheral blood level in the second case was relatively low (0.17mg/L), thus confirming that even the uncontrolled intake of a less toxic calcium channel blocker can lead to death. Furthermore, blood samples were analyzed after 2 years of storage at -20°C: both diltiazem and amlodipine showed a significant degradation (70 and 99%, respectively). [ABSTRACT FROM AUTHOR]

Ethyl glucuronide (EtG) and ethyl sulfate (EtS) are specific and sensitive biomarkers for the diagnosis of acute or chronic alcohol abuse. Due to postmortem alcohol production in biological tissues, they have recently been evaluated as potential biomarkers of ethanol ingestion. This in vitro study aimed to evaluate all developmental stages of the fly Calliphora vicina L. (Calliphoridae). Different pig substrates were used during the in vitro experiments to rear C. vicina. Experiments were performed to: (i) assess the presence of EtG and EtS in larvae, pupae and insects; (ii) study variability due to the substrates characteristics; (iii) evaluate the possibility of false positives due to external alcohol contamination; and (iv) estimate the potential metabolism of ethanol by the insects. EtS was found in all of the samples where the standard was added to the substrate. Muscle provided the most reliable results. EtS was found in larvae, pupae and puparia. EtG and EtS were found in larvae and pupae collected from the body of an alcoholic found dead in his home. This study showed that maggots, pupae and puparia could be a useful matrix for the evaluation of antemortem alcohol ingestion. [ABSTRACT FROM AUTHOR]