scholarly journals Unexpected results found in larvae samples from two postmortem forensic cases

2021 ◽  
Author(s):  
Olwen Groth ◽  
Simon Franz ◽  
Helena Fels ◽  
Julia Krueger ◽  
Gabriele Roider ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Illicit Drugs ◽  
Synthetic Cannabinoids ◽  
Stomach Contents ◽  
Pericardial Fluid ◽  
Supplementary Information ◽  
New Psychoactive Substances ◽  
Psychoactive Substances ◽  
Toxicological Analysis

Abstract Purpose In forensics, entomological specimens can be used as additional/alternative matrices to detect xenobiotics when human specimens are limited in their application. Despite some advantages over implementing putrefied human remains, most medico-legal laboratories do not include entomotoxicological procedures as routine analytical methods. We thus applied two authentic cases to evaluate necrophagous larvae’s potential as complementary matrices for toxicological analysis after extensive postmortem decomposition. Methods Larvae and postmortem human samples, including hair, stomach contents, pericardial fluid, liver, lung, and skeletal muscle, were collected at autopsy. Samples were analyzed by liquid chromatography–tandem mass spectrometry and liquid chromatography–quadrupole time-of-flight mass spectrometry for pharmaceutical substances, illicit drugs, and new psychoactive substances, including synthetic cannabinoids, benzodiazepines, new synthetic opioids, and stimulants. Results Nearly all substances detected in human specimens, including several benzodiazepines and synthetic cannabinoids, were also detected in larvae. Surprisingly, some drugs, including the new psychoactive substances EAM-2201 and U-47700, were found exclusively in larvae and hair. The benzodiazepine etizolam was detected only in liver, lungs, and stomach contents, possibly resulting from characteristic tissue distribution in humans and/or larvae. Conclusions Antemortem external hair contamination with synthetic cannabinoids from side-stream smoke and postmortem hair contamination with substances in putrefaction fluids can be supposed in these cases. Our findings suggest that supplementary information can indeed be gained from analyzing larvae additional to those human specimens that are typically used for toxicological analysis after extensive postmortem decomposition. Nevertheless, these results represent merely two cases, requiring in-depth studies to determine whether such findings can identify acute intoxications as possible causes of death.

scholarly journals Molecular Networking: A Useful Tool for the Identification of New Psychoactive Substances in Seizures by LC–HRMS

2020 ◽  
Vol 8 ◽  
Author(s):  
Flaminia Vincenti ◽  
Camilla Montesano ◽  
Francesca Di Ottavio ◽  
Adolfo Gregori ◽  
Dario Compagnone ◽  
...  
Keyword(s):  
Natural Product ◽  
Illicit Drugs ◽  
Synthetic Cannabinoids ◽  
New Psychoactive Substances ◽  
Nmr Analysis ◽  
Psychoactive Substances ◽  
Molecular Networking ◽  
Fentanyl Analogs ◽  
Global Concern ◽  
Product Search

New Psychoactive Substances (NPS) are a global concern since they are spreading at an unprecedented rate. Despite their commerce still being limited compared to traditional illicit drugs, the identification of NPS in seizures may represent a challenge because of the variety of possible structures. In this study we report the successful application of molecular networking (MN) to identify unexpected fentanyl analogs in two seizures. The samples were extracted with 1 mL of methanol and analyzed with an untargeted data-dependent acquisition approach by LC–HRMS. The obtained data were examined using the MN workflow within the Global Natural Product Search (GNPS). A job was submitted to GNPS by including both seizures and standard mixtures containing synthetic cannabinoids and fentanyls raw files; spectra obtained from standards were used to establish representative networks for both molecular classes. All synthetic cannabinoids in the mixture were linked together resulting in a molecular network despite their different fragmentation spectra. Looking at fentanyls, all the molecules with the typical 188.143 and 105.070 fragments were combined in a representative network. By exploiting the standard networks two unexpected fentanyls were found in the analyzed seizures and were putatively annotated as para-fluorofuranylfentanyl and (iso)butyrylfentanyl. The identity of these two fentanyl analogs was confirmed by NMR analysis. Other m/z ratios in the seizures were compatible with fentanyl derivatives; however, they appeared to be minor constituents, probably impurities or synthetic byproducts. The latter might be of interest for investigations of common fingerprints among different seizures.

scholarly journals Sex and Gender Differences in the Effects of Novel Psychoactive Substances

2020 ◽  
Vol 10 (9) ◽  
pp. 606
Author(s):  
Liana Fattore ◽  
Matteo Marti ◽  
Rafaela Mostallino ◽  
Maria Paola Castelli
Keyword(s):  
Gender Differences ◽  
Illicit Drugs ◽  
Drugs Of Abuse ◽  
Subjective Effects ◽  
Synthetic Cannabinoids ◽  
New Psychoactive Substances ◽  
Sex And Gender ◽  
Psychoactive Substances ◽  
And Gender ◽  
Sex And Gender Differences

Sex and gender deeply affect the subjective effects and pharmaco-toxicological responses to drugs. Men are more likely than women to use almost all types of illicit drugs and to present to emergency departments for serious or fatal intoxications. However, women are just as likely as men to develop substance use disorders, and may be more susceptible to craving and relapse. Clinical and preclinical studies have shown important differences between males and females after administration of “classic” drugs of abuse (e.g., Δ9-tetrahydrocannabinol (THC), morphine, cocaine). This scenario has become enormously complicated in the last decade with the overbearing appearance of the new psychoactive substances (NPS) that have emerged as alternatives to regulated drugs. To date, more than 900 NPS have been identified, and can be catalogued in different pharmacological categories including synthetic cannabinoids, synthetic stimulants (cathinones and amphetamine-like), hallucinogenic phenethylamines, synthetic opioids (fentanyls and non-fentanyls), new benzodiazepines and dissociative anesthetics (i.e., methoxetamine and phencyclidine-derivatives). This work collects the little knowledge reached so far on the effects of NPS in male and female animal and human subjects, highlighting how much sex and gender differences in the effects of NPS has yet to be studied and understood.

scholarly journals Rapid Simultaneous Determination of 11 Synthetic Cannabinoids in Urine by Liquid Chromatography-Triple Quadrupole Mass Spectrometry

2022 ◽  
Author(s):  
Jianbing Wu ◽  
Fang Zhang ◽  
Xing Ke ◽  
Wei Jia ◽  
xuzhi wan ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Solid Phase ◽  
Synthetic Cannabinoids ◽  
Correlation Coefficients ◽  
High Sensitivity ◽  
New Psychoactive Substances ◽  
Triple Quadrupole ◽  
Rat Urine ◽  
Limit Of Quantitation

Synthetic cannabinoids are a series of synthetic substances that mimic the effects of natural cannabinoids and produce a much stronger toxicity than natural cannabinoids, which have become the most abused family of new psychoactive substances. A solid-phase extractive-liquid chromatography-triple quadrupole/linear ion trap mass spectrometry method was developed to determine 11 synthetic cannabinoids in rat urine. The factors affecting recovery were optimized, and Oasis HLB was selected to extract synthetic cannabinoids simultaneously. The results showed that the linear correlation coefficients of the synthetic cannabinoids ranged from 0.993 to 0.999, and the limit of quantitation ranged from 0.01 to 0.1 ng/mL, and the spiked recoveries ranged from 69.90% to 118.39%. This method has the advantages of good purification ability, simple operation, and good reproducibility, and can be used for the high sensitivity analysis of various synthetic cannabinoids in urine.

8. Drugs and toxicology

2020 ◽  
pp. 93-106
Author(s):  
Jim Fraser
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Liquid Chromatography ◽  
Drug Screening ◽  
Analytical Techniques ◽  
Body Fluids ◽  
New Psychoactive Substances ◽  
Psychoactive Substances ◽  
The Dead ◽  
Initial Drug

‘Drugs and toxicology’ provides an overview of the range and complexity of forensic drug examination. The work of a forensic toxicologist involves the analysis of body fluids and tissues to determine the presence or absence of drugs in the living or the dead. The effects of drugs such as cannabis, heroin, new psychoactive substances, GHB, and alcohol are considered. Following an initial drug screening, the most common analytical techniques for identifying and quantifying drugs are various combinations of liquid chromatography and gas chromatography with mass spectrometry. Once a drug has been identified, the next question that arises is: what is the significance of this?

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