Environmental and genetic (in approximately 50%) factors are responsible for the development of alcohol abuse and dependence. The main genes responsible for the risk of harmful alcohol consumption are the genes encoding the enzymes of ethanol metabolism in the human body. Ethyl alcohol is oxidized to acetaldehyde by alcohol dehydrogenases found in the liver (ADH1B, ADH1C and ADH4) and stomach (ADH7). Gastric metabolism of ethanol is able to reduce the amount of alcohol reaching the bloodstream by up to 10% of the dose taken. ADH7 gene variations could be associated as the risk of developing alcohol abuse and dependence.

Aim of the study: Analysis of tag SNPs in the ADH7 gene and determination of the relationship between those variants and the risk of developing alcohol abuse and dependence in the Polish population.

Materials and methods: Blood samples from 159 autopsies from alcohol abusers and/or addicts and 201 buccal swabs taken from controls. Genotyping was performed using the Real Time PCR method with TaqMan probes on 3 tag SNPs: rs284786, rs1154470 (within the ADH7 gene) and rs7690269 (from the intergenic region). The obtained genotypes were randomly verified by Sanger sequencing.

Results and conclusions: The results of the performed statistical analyses of the obtained genotypes did not confirm the relationship between the above-mentioned variants and a risk of developing problems with alcohol consumption, based on samples from the Polish population.

Genetic markers for the prediction of biogeographical ancestry have proved to be effective tools for law enforcement agencies for many years now. In this study, we attempted to assess the potential of insertion-deletion markers (InDel) and microsatellites (STRs) as subsidiary polymorphisms for inference of Slavic population ancestry. For that purpose, we genotyped Slavic-speaking populations samples from Belarus, the Czech Republic, Poland, Serbia, Ukraine and Russia in 46 InDels and 15 STRs by PCR and capillary electrophoresis and analyzed for between-population differentiation with the use of distance-based methods (FST, principal component analysis and multidimensional scaling). Additionally, we studied a sample from a Polish individual of well-documented genealogy whose biogeographic ancestry had previously been inferred by commercial genomic services using autosomal single nucleotide polymorphisms (SNPs), mitochondrial DNA and Y-SNP markers. For comparative purposes, we used genotype data collected in the “forInDel” browser and allele frequencies from previously published papers. The results obtained for InDels and STRs show that the Slavic populations constitute a genetically homogeneous group, with the exception of the Czechs differing clearly from the other tested populations. The analysis of the known Polish sample in the Snipper application proves the usefulness of the InDel markers on the continental level only. Conversely, microsatellites not only improve prediction, but are also informative if considered as an independent set of ancestry markers.

Donor DNA profiling can serve at least two purposes: 1) to enhance the evidential value of DNA deposited on garments/ items and 2) to provide valuable tactical information during crime scene investigation. In this review, different types of methods for the recovery of the contact DNA traces have been summarized. Additionally, with the available techniques, the unique characteristics and limitations thereof have been overviewed. The aim of this paper is to review the techniques of touch traces collection.

In medicolegal practice, rare cases involving suicidal, criminal, or accidental insulin overdose are both analytically and forensically challenging. The aim of this study is to present a model procedure in such cases, developed at the Department of Forensic Medicine and Toxicology of the Medical University of Silesia in Katowice, with particular emphasis on the possibility of additional confirmation of insulin intake by its immunohistochemical detection at the injection site. In the example case presented here, an immunohistochemical examination using FLEX Polyclonal Guinea Pig Anti-Insulin antibody (code IR002, Dako) confirmed the presence of insulin in the subcutaneous tissue of the victims. In our opinion, the method of immunohistochemical detection of insulin at the injection site can and should be used routinely in such cases.

Background: The literature reports cases of ventricular rupture in blunt chest trauma following motor vehicle accidents. It rarely describes cardiac tamponade due to rupture of the heart following blunt thoracic trauma in a physical assault. There are rare cases where fatal cardiac tamponade results from a ruptured ventricle without externally visible injuries to the chest. It is also rare for the cardiac rupture to occur on the posterior side. In our case series, the first case involved a direct blow to the left side of the chest by a projectile (brick), causing rupture of the left ventricle’s base with intact pericardium. In the second case, a direct blow to the left side of the chest led to rupture of the right ventricle’s posterior wall.

Case presentation: Here, we report two autopsy-based case series of isolated right and left ventricular rupture with cardiac tamponade in blunt thoracic trauma with a specific history and background information of assault. The first case is a 35-year-old male assaulted with a brick thrown at his chest in a moving bus; he was declared dead on arrival after a one-hour journey. The second case is a 55-year-old male assaulted with double punches in his chest and declared dead on arrival at the hospital after 30 minutes. A medicolegal autopsy and thorough investigation, in both cases, revealed cardiac tamponade due to ventricular rupture with no underlying pathology. 

Conclusion: This case series underlines the importance of systematic and complete cardiac examination in all death cases following blunt chest trauma even with minimal or no evidence of a visible injury to the chest. Rarely cardiac rupture is noticed on the posterior surface or apex of the heart. The case series illustrates a rare occurrence of cardiac rupture that requires apt investigation and certification of medicolegal causes of death to determine how the death was caused.